Entries |
Document | Title | Date |
20080224710 | HEAVY DUTY BATTERY SYSTEM TESTER AND METHOD - A systematic method and system for testing the charging and starting systems of a vehicle, which requires each individual test to pass before proceeding is provided. In addition, the invention incorporates an improved alternator test that determines whether the alternator belt is slipping using data read using a vehicle data port. Further, the invention provides a battery bank test that correlates the voltage before and after a load is applied to the battery bank to the batteries' conditions. When testing the starter, the oil temperature is read via the vehicle data port, allowing for a determination of whether the current draw is abnormally high. | 09-18-2008 |
20080278172 | VOLTAGE SENSOR MODULE AND VOLTAGE MONITORING APPARATUS - Provided is a voltage sensor module monitoring a voltage of each of a plurality of battery cells, including: first and second terminals each receiving a voltage applied between both ends of the plurality of battery cells; third and fourth terminals each receiving a voltage applied between both ends of a battery cell to be monitored which is included in the plurality of battery cells; a first reference voltage generation circuit connected to each of the first and second terminals and generating a first reference voltage based on the voltage applied between the both ends of the plurality of battery cells; and a first comparator circuit comparing a first regulated voltage generated based on a voltage applied between the third and fourth terminals, with the first reference voltage. As a result, low voltage detection can be performed with accuracy even when an output of a battery cell decreases. | 11-13-2008 |
20080303529 | Vehicle, Power Supply Device of Vehicle, and Current Detection Device - A vehicle comprises a battery, i.e. a power storage unit having a capacity different from a reference capacity, a current sensor for detecting a current inputted to the power storage unit or outputted therefrom and delivering the detection value by converting it depending on the ratio of the capacity of the power storage unit to the reference capacity, and a controller performing current integration by receiving the output from the current detecting section and judging charged state of the power storage unit. The current sensor preferably comprises a sensor for measuring a current flowing through wiring connected with the power storage unit, and a converting section for converting the sensor output depending on the ratio of the capacity of the power storage unit to the reference capacity. When the capacity of the power storage unit is equal to n times of the reference capacity, the converting section delivers the sensor output while multiplying by 1/n. | 12-11-2008 |
20090121721 | DEVICE FOR MONITORING CELL VOLTAGE - A device for monitoring a rechargeable battery having a number of electrically connected cells includes at least one current interruption switch for interrupting current flowing through at least one associated cell and a plurality of monitoring units for detecting cell voltage. Each monitoring unit is associated with a single cell and includes a reference voltage unit for producing a defined reference threshold voltage and a voltage comparison unit for comparing the reference threshold voltage with a partial cell voltage of the associated cell. The reference voltage unit is electrically supplied from the cell voltage of the associated cell. The voltage comparison unit is coupled to the at least one current interruption switch for interrupting the current of at least the current flowing through the associated cell, with a defined minimum difference between the reference threshold voltage and the partial cell voltage. | 05-14-2009 |
20090128158 | VOLTAGE DETECTION DEVICE AND ELECTRIC VEHICLE INCLUDING VOLTAGE DETECTION DEVICE - A voltage detection device for accurately correcting detection errors with voltage greater than an internal reference voltage. The device includes a first switch group of switches for obtaining the voltage across a battery block in a battery pack. A charge-discharge unit has two or more capacitors connected in series or in parallel. A voltage detector detects discharge voltage of the capacitors. In a first period, the capacitors are series-connected and charged with the voltage of the battery block. In a second period, the capacitors charged in the first period are series-connected and discharged, and the voltage detector detects the discharge voltage. In a third period, the capacitors are parallel-connected and each capacitor is charged with an internal reference voltage. In the fourth period, the capacitors charged in the third period are series-connected and discharged, and the detection error is corrected using the discharge voltage as a reference. | 05-21-2009 |
20090128159 | BATTERY PACK ANOMALY DETECTING METHOD AND BATTERY PACK - An anomaly detecting method for a battery pack including a secondary battery made up of at least one cell and a voltage detecting circuit for measuring cell voltage of the secondary battery comprises the steps of measuring the cell voltage, judging by using the measured cell voltage whether predefined anomaly judgment conditions to be used in determining that at least one of an internal short circuit of the cell and an anomaly of the voltage detecting circuit has occurred are satisfied, and determining that at least one of the internal short circuit of the cell and the anomaly of the voltage detecting circuit has occurred if the anomaly judgment conditions are judged to have been satisfied. The anomaly detecting method prevents in advance continued execution of charge operation when the cell voltage does not reach a threshold voltage due to an internal short circuit of the cell or an anomaly of the voltage detecting circuit. | 05-21-2009 |
20090146664 | BATTERY STATE OF HEALTH MONITORING SYSTEM AND METHOD - A state-of-health monitoring and prognosis method and system for a battery includes a signal preprocessing module for monitoring battery terminal voltage and current and extracting a portion of the battery terminal voltage and current corresponding to an engine cranking event. Battery voltage loss that occurs during said engine cranking event is estimated from the extracted portion of battery terminal voltage and current by a voltage loss estimation module. The estimated battery voltage loss is compared with a predetermined voltage loss threshold to determine battery state-of-health by a state-of-health evaluation module. | 06-11-2009 |
20090174411 | ABNORMAL VOLTAGE DETECTOR APPARATUS FOR DETECTING VOLTAGE ABNORMALITY IN ASSEMBLED BATTERY - An abnormal voltage detector apparatus is provided for an assembled battery including a plurality of battery blocks connected in series to each other. In the abnormal voltage detector apparatus, a detecting part detects whether or not each of the battery blocks is in a voltage abnormality state by comparing either one of a voltage of each battery block and each battery measuring voltage, that is a voltage lowered from the voltage of each battery block, with a predetermined reference voltage, generates each of abnormality detecting signals containing information about a detected result, calculates a time ratio of a time interval, for which the assembled battery is in a voltage abnormality state, to a predetermined time interval, based on the abnormality detecting signals, and detects a voltage abnormality of the assembled battery based on a calculated time ratio. | 07-09-2009 |
20090237087 | Power source health assessment methods and systems thereof - A method and system for assessing health of a power source includes measuring voltage and current of a power source in a system using a device in the system as the load. An internal resistance of the power source is determined based on the measured voltage and current. A health assessment of the power source is determined and provided based at least on the determined internal resistance and a stored baseline internal resistance for the power source. | 09-24-2009 |
20090261838 | Battery monitor for marine applications - A battery monitor for marine applications which includes a first voltage comparator circuit which compares the voltage input of a marine battery to a first predetermined reference voltage; an audible alarm which operates when the voltage comparator circuit determines that the voltage input of the marine battery is below that of the first predetermined reference voltage, and wherein the battery monitor draws less than 100 milliamps of current on a continuous basis while monitoring the voltage input of the marine battery. | 10-22-2009 |
20090322340 | Method for battery state-of-health monitoring using battery voltage during vehicle starting - A method is provided for determining a battery's state-of-health. An initial battery voltage is measured after a first voltage drop during an initiation of an engine cranking phase. A battery voltage is monitored during the remainder of the engine cranking phase. A lowest battery voltage is determined during the remainder of the engine cranking phase. A determination is made if a voltage difference between the lowest battery voltage and the initial battery voltage at the initiation of the engine cranking phase is less than a voltage threshold. A low battery state-of-health is identified in response to the voltage difference being less than the voltage threshold. | 12-31-2009 |
20100079146 | BATTERY INFORMATION ACQUIRING APPARATUS - There is an apparatus includes a voltage acquiring unit which acquires an inter-terminal voltage of the battery cell; a battery information acquiring circuit which acquires battery information of the battery cell with the acquired voltage being supplied as a power supply voltage and; a transformer configured to have a primary winding and a secondary winding, the primary winding being connected to a common wire; a communication circuit which transmits a signal of the battery information to a management unit, supplied with the acquired voltage as a power supply voltage; a rectification circuit which rectifies a signal of a predetermined frequency from the management unit to generate a DC voltage; and a control circuit which controls the supply of the power supply voltages to the battery information acquiring circuit and the communication circuit, the control circuit being supplied with the DC voltage as a power supply voltage. | 04-01-2010 |
20100123463 | BATTERY END-POINT VOLTAGE DETECTION METHOD AND BATTERY END-POINT VOLTAGE DETECTION SYSTEM - Battery driven display device includes a battery, first and second comparators, non-volatile memory, controller driven by the voltage of the battery, and display device. Non-volatile memory stores the first and second reference voltages of the first and second comparators measured by using stabilized power supply. Controller detects when the first and second reference voltages of the first and second comparators become lower than the voltage of the battery when battery is connected, and determines the time at which end-point voltage of the battery will be reached based on the first and second detection times at the time of measurement and the measured reference voltages. | 05-20-2010 |
20100127710 | FUEL CELL SYSTEM - A fuel cell system is configured to have: a voltage superimposing unit that superimposes a predetermined AC signal on an output voltage of a fuel cell; a unit that detects an output voltage value of a battery device, the output voltage value varying as the fuel cell output voltage value on which the AC signal has been superimposed varies; a battery device voltage comparison unit that compares the detected battery device output voltage value with a predetermined threshold voltage; and a measurement permission determination unit that determines whether the AC impedance measurement is permitted or not based on whether or not the battery device output voltage value exceeds the threshold voltage. The fuel cell system can protect the battery device in the impedance measurement of the fuel cell based on an AC impedance method. | 05-27-2010 |
20100213947 | BATTERY ASSEMBLY WITH ENHANCED PROPERTIES - A battery assembly for use in an aircraft. The battery assembly may include a battery and a circuit configured to monitor the battery in situ. The circuit may include at least one sensor positioned to sense at least one property of the battery and a processor in communication with the sensor. The battery assembly may also include a battery housing, wherein the battery and the circuit are positioned within the battery housing. A method for evaluating a battery in an electric device. The method may include collecting operational information from the battery. The operational information may be collected without removing the battery from the electric device. The method may also include comparing the operational information to a degradation routine describing a property of the battery and calculating a capacity of the battery. | 08-26-2010 |
20100231226 | Device and Method for Determining Replacement of Storage Battery - A control unit ( | 09-16-2010 |
20100244847 | Battery Monitoring System - A battery monitoring system, comprises a battery state detection circuit that detects battery states of a plurality of battery cells that are connected in series, based on respective cell voltages of the plurality of battery cells, and a control circuit that monitors state of a battery cell, based on each cell voltage of the plurality of battery cells. The control circuit inputs pseudo voltage information to the battery state detection circuit, and thereby diagnoses whether or not the battery state detection circuit is operating normally. | 09-30-2010 |
20100283472 | VERFAHREN ZUR UBERWACHUNG DER RESTSTANDZEIT EINER BATTERIE - A method for monitoring the remaining service life of a battery used for operating a field device in automation technology. The present power consumption of the battery is ascertained. Then, during a first phase of life, power consumption of the battery ascertained during operation of the field device is compared with a predetermined threshold value. In the case of exceeding the predetermined threshold value, during a second phase of life, the battery is exposed to defined load spikes at predetermined time intervals. Voltage collapses corresponding to the defined load spikes are detected, and a warning report is generated when the voltage collapses reach a predetermined maximum limit value. | 11-11-2010 |
20100308834 | APPARATUS FOR DETECTING A STATE OF SECONDARY BATTERY - A lithium-ion secondary battery includes an aluminum case, an electrolytic solution, a positive plate, a negative plate, a positive terminal, a negative terminal, and voltage sensors. The positive terminal and the negative terminal project to the outside of the case while being insulated from the case. The voltage sensor is connected between the case and the positive terminal and detects the potential of the positive terminal with respect to a potential VR of the case. The voltage sensor is connected between the case and the negative terminal and detects the potential of the negative terminal with respect to the potential VR of the case. From the detected results, the states of the positive plate and the negative plate are separately detected. | 12-09-2010 |
20110012605 | CURRENT BASED OVERVOLTAGE AND UNDERVOLTAGE DETECTOR - With batteries or cells, particularly lithium ion cells, it is important to determine when one or more cells have entered a fault condition (i.e., overvoltage or undervoltage). Conventional circuits employ measuring circuits that use multiple bandgap circuits and high voltage components. These conventional circuits, however, consume a great deal of area because of the use of these multiple bandgap circuits and the high voltage components. Here, a circuit is provided that reduces the number of bandgap circuits and reduces the number of high voltage components, reducing the area consumed and reducing the overall cost of production compared to conventional circuits. | 01-20-2011 |
20110031975 | Battery-Driven Power Tool and Battery Pack Therefor - A battery pack includes a chargeable battery, a battery voltage detecting section, and a determining section. The battery voltage detecting section is configured to detect a battery voltage output from the rechargeable battery. The determining section is configured to determine a voltage level status of the rechargeable battery based on the battery voltage detected by the battery voltage detecting section. The determining section is free from determining the voltage level status when a rate of change in the battery voltage is equal to or greater than a predetermined criteria. Such a battery pack is used for a power tool. | 02-10-2011 |
20110031976 | VOLTAGE MEASURING APPARATUS FOR ASSEMBLED BATTERY - A voltage measuring apparatus measures an output voltage of an assembled battery in which a plurality of unit cells are connected in series and are divided into a plurality of blocks. The apparatus includes: a block voltage detection section which detects a voltage of at least one of the plurality of blocks and provides an analog voltage signal; a reference power supply which generates a reference voltage; a sampling voltage generation section which generates a sampling voltage based on the reference voltage; a storage for storing voltage date corresponding to the sampling voltage; and an A/D conversion section of the block voltage detection section that digitizes the sampling voltage with the reference voltage for A/D conversion. A difference between the digitized sampling voltage and the voltage data is calculated and it is determined that abnormality occurs in the A/D conversion section when the difference is larger than a threshold. | 02-10-2011 |
20110037476 | METHOD AND APPARATUS FOR DETECTING ABNORMALITY OF CURRENT SENSOR IN BATTERY PACK - Disclosed are a method and an apparatus for detecting abnormality of a current sensor operative to measure a charge or discharge current of a battery pack. The method comprises measuring current and voltage of the battery pack; and detecting abnormality of the current sensor by comparing variations in current and voltage over a predetermined time with a current reference value and a voltage reference value, respectively. | 02-17-2011 |
20110074434 | END OF LIFE DETECTION FOR A BATTERY - One particular implementation conforming to aspects of the present invention takes the form of a method for detecting the end of life of a battery for an electronic device. The method may include calculating the voltage of the battery in an unloaded state, holding the sampled unloaded battery voltage, measuring a loaded battery voltage, calculating the difference between the unloaded and loaded battery voltages and amplifying the calculated difference. Other implementations may take the form of a circuit to perform one or more of the operations of the above method. The circuit may include a sample and hold section and a differential amplifier to provide the amplified difference to a microcontroller for analysis. The microcontroller may also provide a warning or indication to the device or to a user of the device when the battery nears the end of life. | 03-31-2011 |
20110074435 | VOLTAGE MONITOR WITH SELF DIAGNOSTIC FUNCTION - In a voltage monitor, an abnormality detecting unit receives first information outputted from a first obtaining unit and second information outputted from a second obtaining unit, and determines that an abnormality that affects on at least one of first and second diagnostic thresholds arises in the voltage monitor when the first information is different from the second information. The abnormality detecting unit receives a first forced signal outputted from a first forced-output unit and a second forced signal outputted from a second forced-output unit. The abnormality detecting unit determines whether a timing at which the level of the first diagnostic threshold is switched for each step is deviated from a timing at which the level of the second diagnostic threshold is switched for a corresponding step based on a result of a comparison between the first forced signal and the second forced signal. | 03-31-2011 |
20110101987 | ABNORMALITY DETERMINATION SYSTEM FOR SECONDARY BATTERY - An abnormality determination system may include a secondary battery that includes a battery case including a positive terminal and a negative terminal, a switch unit that connects electrically the positive terminal to the battery case based on a first control signal, the switch unit breaking electrically a connection between the positive terminal and the battery case based on a second control signal, a voltage measurement unit that measures a voltage of the battery case, and a determination unit that determines an abnormality of the secondary battery based on the voltage. | 05-05-2011 |
20110121836 | METHOD OF CONTROLLING SECONDARY BATTERY - A method of controlling a secondary battery is disclosed. The method includes repeatedly disconnecting and connecting the secondary battery and a load as a result of a sensed current being greater than a maximum load current value, and maintaining the connected or the disconnected state according to a comparison of a second sensed current and the maximum load current value. | 05-26-2011 |
20110133745 | METHOD AND APPARATUS FOR BATTERY POWER PRE-CHECK AT SYSTEM POWER-ON - A system including at least one electronic component and a battery check circuit. When a power consumption level of the at least one electronic component is increased, the battery check circuit determines whether to provide power from a battery to the at least one electronic component by comparing a power level of the battery to a first power level. | 06-09-2011 |
20110148425 | SYSTEMS AND METHODS FOR DETECTING AN OPEN CELL TAP IN A BATTERY PACK - A method is provided for detecting an open cell tap condition in a battery pack. The method includes: applying a detection voltage across an electrical impedance that is coupled to a measurement node, where the detection voltage exceeds voltage measures at a node disposed between serially coupled battery cells of the battery pack and the measurement node is coupled by a circuit path to said node; measuring the voltage at the measurement node while the detection voltage is being applied; and detecting a break in the circuit path when the voltage measured at the measurement node is substantially equal to the detection voltage. | 06-23-2011 |
20110156713 | APPARATUS FOR CALCULATING POLARIZATION VOLTAGE OF SECONDARY BATTERY AND APPARATUS FOR ESTIMATING STATE OF CHARGE OF THE SAME - There is provided an apparatus that calculates a polarization voltage of a secondary battery. A temperature sensor detects a temperature of the secondary batter; a voltage sensor detects a voltage of the secondary battery; and a current sensor detect an electric current of the secondary battery. A battery ECU calculates a polarization voltage based on the electric current and adaptively sets an upper limit value and a lower limit value of the polarization voltage according to a temperature characteristic of the secondary battery. The calculated polarization voltage is compared with an upper limit value and a lower limit value, whereby the polarization voltage is corrected. An SOC is estimated based on the corrected polarization voltage. | 06-30-2011 |
20110234232 | SORTING MACHINE OF BATTERY CELL AND SORTING METHOD THEREOF - A battery cell sorting machine includes an inserting unit into which a battery cell is inserted, a measuring unit on which the inserted battery cell is placed, an open circuit voltage (OCV) measuring unit configured to measure an OCV of the battery cell placed on the measuring unit, a loading unit configured to discharge the battery cell placed on the measuring unit, a discharge voltage measuring unit configured to measure a discharge voltage of the battery cell discharged by the loading unit, and a control unit configured to sort battery cells placed on the measuring unit into different groups, wherein the control unit is configured to calculate a voltage differential between the OCV and the discharge voltage of each of the battery cells and to sort the battery cells having corresponding voltage differential ranges between the OCV and the discharge voltage into one group. | 09-29-2011 |
20110273182 | DETECTING THE VOLTAGE IN BATTERY CELLS - The invention relates to an evaluation circuit for detecting the voltage in battery cells of a battery system which are preferably connected in series. The evaluation circuit includes serially connected resistors, the number of which is equal to the number of battery cells for which the voltage is to be detected. One of the resistors is associated with each of the battery cells. The evaluation circuit further includes a power source for generating a current that is continuous in some sections and is applied to the serially connected resistors, a number of comparators equal to the number of resistors to compare a voltage released at a resistor associated with a battery cell to the voltage in the battery cell with which the resistor is associated, and output a respective output signal when the voltage released at a resistor associated with a battery cell is equal to, exceeds, or drops below the voltage in the battery cell, and an evaluation circuit for deriving the voltage in each battery cell on the basis of a point in time when the respective output signal is output and on the basis of the variation of the current that is continuous in some sections. | 11-10-2011 |
20110309840 | BATTERY ANOMALY DETERMINATION APPARATUS AND BATTERY ANOMALY WARNING APPARATUS - A memory stores information that stipulates a standard variable value of a battery residual quantity of a battery during an electric power supply in association with a consumed electric current. A battery anomaly determination apparatus specifies a standard variable value of the battery residual quantity corresponding to a total consumed electric current of loads connected with a battery mounted in a vehicle based on the information stored in the memory, and compares the specified standard variable value of the battery residual quantity with a detection value of the battery residual quantity of the battery mounted in the vehicle, thereby determining and warning an anomaly of the battery. | 12-22-2011 |
20120001639 | VOLTAGE MONITOR - A first monitor circuit | 01-05-2012 |
20120019253 | METHOD FOR DETERMINING AN AGING CONDITION OF A BATTERY CELL BY MEANS OF IMPEDANCE SPECTROSCOPY - The invention relates to a method for determining an aging condition of a battery cell. The method has the following steps of a) providing a battery cell, b) recording an impedance spectrum of the battery cell, c) determining an evaluation quantity based on the measured impedance spectrum, and d) determining an aging condition of the battery cell based on a comparison of the evaluation quantity to a reference value. | 01-26-2012 |
20120025835 | Sensor Arrangement for an Energy Storage Device and a Method of Using the Same - A sensor arrangement and method that may be used with a variety of different energy storage devices, including battery packs found in hybrid vehicles, battery electric vehicles, and other types of vehicles. Some battery monitoring systems, such as those designed to monitor and/or control lithium-ion battery packs, may require individual voltage readings for each and every cell. If a battery monitoring system component—even one that provides just one of these sensor readings—malfunctions or otherwise experiences a fault condition, then it may be necessary to bring the entire vehicle in for service. The exemplary sensor arrangement and method may be used to control a series of balancing switches in the sensor arrangement in such a way that enables the vehicle to detect fault conditions and to continue operating successfully in the event that such fault conditions occur. | 02-02-2012 |
20120032682 | BATTERY OPTIMIZATION AND PROTECTION IN A LOW POWER ENERGY ENVIRONMENT - A method and apparatus for providing battery optimization and protection in a low power energy environment is presented. A current configuration of a battery module including a plurality of a particular type of battery is determined. A voltage level of the battery module is detected. A determination is made whether the current configuration of the battery module is a preferred configuration for the particular type of batteries of the battery module. When the determination is that the current configuration of the battery module is not the preferred configuration for the particular type of batteries of the battery module, then the battery module is reconfigured to a preferred configuration for the particular type of batteries of the battery module. | 02-09-2012 |
20120038365 | LIQUID LEAKAGE PROPAGATION RESTRAINING STRUCTURE FOR ELECTRICITY STORAGE DEVICE AND BUS BAR MODULE - In a liquid leakage propagation restraining structure, a voltage detection terminal that detects the voltage of an electricity storage device is connected to an electrode of the electricity storage device so that a crimp contact surface side of the voltage detection terminal to which an electric cable is crimped faces in the direction opposite the direction to the electrode. Therefore, the structure restrains the electrolytic solution that has leaked out and propagated to the electric cable from entering the interior of the core wire of the electric cable. | 02-16-2012 |
20120056624 | VOLTAGE MONITORING USING BITSTREAM SIGNAL PROCESSING - Systems and methods are provided for monitoring a voltage. A level shifter is configured to generate a current proportional to the voltage of the battery cell. A delta-sigma modulator is configured to convert the current into a first density modulated bitstream representing the voltage of the battery cell. A first reference source is configured to provide a second density modulated bitstream representing a first threshold voltage. A first comparator is configured to compare the first density modulated bitstream and the second density modulated bitstream. | 03-08-2012 |
20120062237 | Method and Apparatus for Charging a Battery - A method of testing a battery is provided the method may include: (a) applying a heavy load to the battery, (b) measuring the voltage V | 03-15-2012 |
20120062238 | Battery Controller and Voltage Abnormality Detection Method - A battery controller for controlling an assembled battery configured by connecting battery groups each including battery cells, includes: voltage measuring units that are provided respectively for the battery groups each to measure a voltage of each of the battery cells included in a corresponding battery group; a minimum value detecting unit that detects a minimum value of the battery cells for each of the battery groups based upon the measured voltage of each of the battery cells; a reference value setting unit that sets a reference value used to determine an abnormal voltage drop for each of the battery groups based upon the measured voltage of each of the battery cells; and an abnormality determining unit that makes a determination that an abnormal voltage drop is present, if a difference between the reference value and the minimum value exceeds a predetermined value, for each of the battery groups. | 03-15-2012 |
20120081126 | BATTERY MONITORING SYSTEM WITH A SWITCHING MODE TOPOLOGY - A battery monitoring system for a battery including multiple battery cells is disclosed. The battery monitoring system includes multiple first switch sets coupled across the battery cells respectively, an energy storage element, and a comparator coupled to the energy storage element via a second switch set. The energy storage element samples cell voltages of the battery cells via the first switch sets respectively. The comparator compares a respective cell voltage with a first reference signal to determine whether a fault condition occurs on a respective battery cell. The second switch set and one of the first switch sets are turned on alternately. | 04-05-2012 |
20120081127 | METHOD FOR EVALUATING THE ABILITY OF A BATTERY TO START - The charge state of a battery powering a starter of a motor vehicle is evaluated to determine whether the battery voltage is sufficiently high to re-start an internal combustion engine during a stop/start operating mode. The engine is operated to drive a generator so that the generator output voltage is at a level below a setpoint value for a time period. At the end of the time period, the battery voltage is measured and if it exceeds a threshold voltage the battery charge state is determined to be sufficient to re-start the engine. The threshold voltage is approximately equal to the rated battery voltage. If the measured battery voltage is below the threshold voltage value, indicating that the battery will not have sufficient charge to re-start the motor, automatic shut-off of the engine when the vehicle stops is suppressed. | 04-05-2012 |
20120105071 | BATTERY TESTING DYNAMIC DELTA VOLTAGE MEASUREMENT - A method of evaluating battery packs is described. The method includes measuring a cell open voltage for each battery cell group in a section of battery cells; measuring a voltage under charge, or a voltage under load, or both, at a predetermined time interval for each battery cell group in the section of battery cells; determining the magnitude of the difference between the open cell voltage and the voltage under charge, or the voltage under load, or both, for each battery cell group in the section of battery cells by subtracting the voltage under charge from the cell open voltage, or subtracting the voltage under load from the cell open voltage, or both; and determining if the magnitude of the difference between the open cell voltage and the voltage under charge, or the voltage under load, or both, for each battery cell group in the section of battery cells exceeds a predetermined level. | 05-03-2012 |
20120112755 | BATTERY VOLTAGE MONITORING CIRCUIT - A battery voltage monitoring circuit includes a first power supply terminal to be connected to the positive terminal of a battery pack having rechargeable cells connected in series; a first supply voltage sensing terminal to be connected to the positive terminal of the battery pack; a first resistor connected between the first power supply terminal and the first supply voltage sensing terminal; a second supply voltage sensing terminal to be connected to the negative terminal of a first rechargeable cell of the rechargeable cells, the first rechargeable cell being on the positive terminal side of the battery pack and connected to the positive terminal of the battery pack; a second resistor connected between the second supply voltage sensing terminal and the first power supply terminal; and a first comparator configured to compare a voltage at the first power supply terminal and a voltage at the first supply voltage sensing terminal. | 05-10-2012 |
20120119748 | BATTERY VOLTAGE MEASUREMENT SYSTEM AND BATTERY VOLTAGE MEASUREMENT METHOD - The present invention provides a battery voltage measurement system and battery voltage measurement method that may reduce the size of the battery voltage measurement system. A regulator generates a constant voltage based on a battery voltage, and inputs the constant voltage to an analog input terminal of an AID converter. The battery voltage is directly inputted to a reference voltage terminal of the AID converter via a terminal (a pad). The A/D converter uses the battery voltage as a reference voltage, determines the level of the input voltage which is the constant voltage, in respect to the reference voltage, and outputs a conversion result. The conversion results increase with a decrease in the battery voltage. Accordingly, the battery voltage is measured and monitored by a processing section on the basis of the conversion results. | 05-17-2012 |
20120133370 | Battery System for Vehicle, On-Vehicle Battery Module, and Cell Controller - A battery system for vehicle comprises a battery unit that is constituted with a plurality of serially connected cell groups each include a plurality of serially connected battery cells, integrated circuits that are each disposed in correspondence to one of the cell groups of the battery unit and each measure terminal voltages at the battery cells in the corresponding cell group, and a signal transmission path through which one of the integrated circuits is connected to another one of the integrated circuits or to a circuit other than that of the integrated circuits. | 05-31-2012 |
20120139547 | Systems and Methods of Cell Imbalance Detection - Example embodiments of the systems and methods of cell imbalance detection disclosed herein may prevent any cell of a multi-cell battery pack from exceeding over voltage conditions of the battery. In an example embodiment, automatic cell imbalance detection may be performed using two cells in series. The example embodiment determines the relative cell voltages. If a difference between the two cells of more than a certain threshold is detected, a cell balancing circuit may be activated to discharge the cell with the higher voltage. Example embodiments use no microprocessor, nor an ADC. An advantage of this approach over previous solutions is the relative knowledge of the cell voltages. | 06-07-2012 |
20120139548 | ANALOG SWITCH, BATTERY PACK INCLUDING THE SAME AND BATTERY VOLTAGE MEASURING METHOD - A battery pack is provided. The battery pack includes first battery cells, a second battery cell coupled to one of the first battery cells, a voltage sensing and balancing circuit for measuring voltages of the first battery cells and for maintaining voltage balance between the first battery cells, a controller that includes an analog-to-digital (A/D) converter, and an analog switch for measuring a voltage value of the second battery cell and for transferring the measured voltage value to the A/D converter. The controller is for controlling charging and discharging of the first and second battery cells. The analog switch includes a flying capacitor, a first switch unit for transferring a voltage between the second battery cell and the flying capacitor, a second switch unit for transferring a voltage of the flying capacitor to the A/D converter, and a first diode for protecting a voltage source from a surge current. | 06-07-2012 |
20120139549 | MEASURING ISOLATED HIGH VOLTAGE AND DETECTING ISOLATION BREAKDOWN WITH MEASURES FOR SELF-DETECTION OF CIRCUIT FAULTS - A system for making high voltage measurements to measure a voltage of a battery pack and detect of an isolation fault. The system includes a first resistive divider comprising at least a first resistive element and a second resistive element. The system also includes a second resistive divider comprising the second resistive element and a third resistive element. The system also includes a plurality of switches comprising a first switch and a second switch coupled between the second resistive element and the battery pack. The system further includes a controller configured to control the plurality of switches to operate in first mode to measure the voltage of the battery pack based on a voltage produced by the first resistive divider, and to control the plurality of switches to operate in at least a second mode to detect an isolation fault based on a voltage produced by the second resistive divider. | 06-07-2012 |
20120146652 | ASSEMBLED BATTERY SYSTEM AND FAILURE DETECTION METHOD OF ASSEMBLED BATTERY SYSTEM - An assembled battery system is disclosed that includes a plurality of serially-connected battery cells; voltage detecting lines connectable at one ends to electrodes of the battery cells of the assembled battery; electric resistors serially-connected at one ends to the other ends of the voltage detecting lines; capacitors connected to the other ends of the electric resistors, each of the capacitors being configured to electrically interconnect one of the voltage detecting lines and the other voltage detecting line; voltage measuring circuits connected respectively to each of the voltage detecting lines; electrically openable short-circuiting switches arranged between the capacitors and the voltage measuring circuits and parallel-connected to the capacitors; and a monitoring circuit that detects a difference between a first measurement result and a second measurement result with respect to each of the short-circuiting switches and a failure of the voltage detecting lines, the short-circuiting switches or the voltage measuring circuits. | 06-14-2012 |
20120176140 | METHOD FOR PRODUCING SECONDARY BATTERY - Disclosed is method for producing a secondary battery, which enables the selection of a secondary battery having a defect caused by a micro short-circuit with high accuracy. Specifically disclosed is a step (S | 07-12-2012 |
20120182021 | DIFFERENTIAL CURRENT MONITORING FOR PARALLEL-CONNECTED BATTERIES - A system for determining battery characteristics based on differential current monitoring includes a first battery; a second battery, the second battery being connected in parallel with the first battery; and a differential current measurement module comprising at least one current measuring device, the differential current measurement module being configured to determine a differential current associated with the first battery and the second battery. A method for determining battery characteristics based on differential current monitoring includes determining a differential current associated with a first battery and a second battery, the first battery being connected in parallel with the second battery. | 07-19-2012 |
20120194199 | BATTERY VOLTAGE MONITORING APPARATUS - The battery voltage monitoring apparatus has a structure in which, for each adjacent two of battery cells, the positive electrode of the battery cell on the higher voltage side and the negative electrode of the battery cell on the lower voltage side are connected to a corresponding one of common terminals provided in an RC filter circuit. The common terminal is branched into first and second branches respectively connected with a first resistor and a second resistor. The first and second resistors are connected to a corresponding one of positive side detection terminals and a corresponding one of negative side detection terminals, respectively. A capacitor is connected across a corresponding one of pairs of the positive side and negative side detection terminals. Switches for making short circuits respectively between the positive side detection terminals and between the negative side detection terminals corresponding to each adjacent two battery cells are provided. | 08-02-2012 |
20120306505 | ELECTRICAL APPARATUS AND VERIFICATION METHOD FOR BATTERY MODULE THEREOF - An electrical apparatus including a battery module and a battery verification module is disclosed. The battery module has a verification circuit and an identification resistor. When the battery module is connected to the battery verification module, the battery verification module obtains a type information of the battery module according to the voltage level on a coupled point between a reference resistor and the identification resistor. The battery verification module transmits a verification request to the verification circuit to allow the verification circuit to transmit a verification signal to the battery verification module through a coupled path between the reference resistor and the identification resistor. The reference resistor is built in the battery verification module. | 12-06-2012 |
20130015860 | Method And System For Determining A Target State of Charge To Charge A Battery In A Vehicle Using External Electric PowerAANM Crombez; Dale ScottAACI LivoniaAAST MIAACO USAAGP Crombez; Dale Scott Livonia MI US - A system and method is provided for determining a target state of charge (SOC) to charge a storage battery in an electric vehicle using electric power from an external power source. Charging the storage battery to the target SOC occurs prior to starting a drive cycle of the vehicle. The target SOC is determined based on a profile of regenerative braking energy expected to be recovered and a profile of energy expected to be used from the battery during a portion of a future drive cycle. | 01-17-2013 |
20130049761 | BATTERY STACK CELL MONITOR - A battery monitor system for determining a cell voltage between a low side contact and a high side contact of a cell in situ as one of a plurality of cells connected in series to form a battery. The system uses an arrangement of switches and capacitors to shift relatively high absolute voltages of a battery stack to a relative low voltage level so lower voltage electronics can be used to monitor cell voltages. The system may be configured to provide a single ended measurement or a differential measurement indicative of a cell voltage. The differential measurement may be advantageous to correct or offset signal noise caused by electromagnetic interference (EMI). | 02-28-2013 |
20130049762 | Battery Management - Battery management may be provided. First, a battery string in a battery bank may be charged for a charge time. After charging the battery string, the battery string may be isolated from charging for a rest time. Once the charging and resting from charging is complete, a test open circuit voltage for each battery in the first battery string may be measured. In addition, a defective indicator that a battery is defective may be recorded in a database. Next, a battery may be loaded with a preset load for a load time. After loading the battery, a test load voltage for each of the batteries loaded with the preset load may be measured. A second defective indicator that a battery is defective may be recorded in the database when the test load voltage for the second battery is greater than a load voltage differential. | 02-28-2013 |
20130057293 | VOLTAGE MONITORING CIRCUIT, TEST METHOD THEREFOR, AND VOLTAGE MONITORING SYSTEM - A voltage monitoring circuit includes a plurality of voltage input terminals which input a voltage across each of a plurality of series-coupled battery cells, a selection circuit which, by selecting two of the voltage input terminals, selects a voltage across one of the battery cells; an A/D converter which converts the voltage across the battery cell into a digital value, a control unit which sends the digital value to an external controller, a ground wiring which is coupled to a ground terminal for inputting a ground level voltage for the voltage monitoring circuit, the ground terminal being among the voltage input terminals, and through which the voltage monitoring circuit is supplied with the ground level voltage, a terminal which is supplied with a lowest fixed potential, and a switch circuit which is coupled between the first terminal and the ground wiring. | 03-07-2013 |
20130069661 | DIAGNOSTIC USE OF A PLURALITY OF ELECTRICAL BATTERY PARAMETERS - In at least one embodiment, a power management module measures different observable quantities of a battery, such as terminal voltage or current, and measures a voltage response of the battery based upon the measurements. The measured voltage response of the battery is compared to a plurality of reference voltage responses, which may be determined for authentic batteries, for example. If the measured voltage response corresponds to each of the reference voltage responses, the battery is authenticated for use with an electronic device. If necessary, additional voltage responses may be measured and compared against corresponding reference voltage responses until the battery is authenticated by a sufficient number of corresponding responses. A relative condition of the battery, such as an age or state of health, may also be estimated based on the measured voltage response of the battery. | 03-21-2013 |
20130076364 | BATTERY DETECTION METHOD - A battery detection method detecting if a voltage to be tested falls within a voltage range between a highest voltage of a rechargeable battery and a highest detection voltage. If the voltage to be tested is less than the highest detection voltage, further determine if the voltage to be tested reaches a target voltage within a test time period. If the voltage to be tested reaches the target voltage after the test time period expires, determine that the voltage to be tested is from a rechargeable battery. If the voltage to be tested reaches the target voltage within the test time period, determine that the voltage to be tested is from a non-rechargeable battery. Accordingly, the battery detection method can easily detect if a voltage to be tested is from a rechargeable battery. | 03-28-2013 |
20130088236 | BATTERY-MONITORING DEVICE - A battery-monitoring device that monitors a state of charge of each battery cell constituting a battery is provided, including: a voltage detection circuit that individually detects a voltage of the battery cell; a voltage comparison circuit that individually compares the voltage of the battery cell and a threshold voltage, and outputs a signal having a first level when the voltage of the battery cell is equal to or greater than the threshold voltage, and a signal having a second level when the voltage of the battery cell is less than the threshold voltage; and a determination unit that determines the overcharged state of the battery cell when at least one condition is satisfied from among two conditions of: a voltage detection value which is input from the voltage detection circuit being equal to or greater than a threshold; and a signal which is input from the voltage comparison circuit being a first level. | 04-11-2013 |
20130093429 | BATTERY GAUGE ESTIMATION DEVICE - A battery gauge estimation device is disclosed, having an impedance element, a switch, a control circuit, a voltage detection circuit, and an estimation circuit. The impedance element is coupled between a first terminal and a second terminal of a battery, and the switch is coupled between the impedance element and the first terminal of the battery. The control circuit configures the switch to be intermittently conducted at a predetermined frequency. The voltage detection circuit detects the voltage difference between the terminals of the impedance element. The estimation circuit generates a remaining power estimation according to the detected voltage difference. | 04-18-2013 |
20130106428 | BATTERY VOLTAGE MONITORING APPARATUS | 05-02-2013 |
20130127474 | CONTROL PROCESSING METHOD OF ENERGY-SAVING CELL AND BASE STATION - Disclosed are a control processing method of an energy-saving cell and a base station. The method comprises: a base station to which a basic coverage cell belongs judging whether a current load state is greater than or equal to a preset energy saving threshold, where more cells are required to participate in a service when the current load state is greater than or equal to the preset energy saving threshold, and the basic coverage cell refers to a cell unable to be turned off or enter an energy saving state in order to ensure continuity; when the current load state is greater than or equal to the preset energy saving threshold, the base station to which the basic coverage cell belongs determining a distribution state of a current service load of a serving cell; the base station to which the basic coverage cell belongs determining, according to information of an energy-saving cell and the distribution state of the current service load, the energy-saving cell to be deactivated, the energy-saving cell being a cell capable of entering the energy saving state; and the base station to which the basic coverage cell belongs deactivating the determined energy-saving cell. The present invention provides a solution for selectively activating and deactivating an energy-saving cell among different systems, and can optimize the existing energy saving technology, and improve the energy utilization rate of the entire network. | 05-23-2013 |
20130162259 | REFERENCE REUSE IN HIGH VOLTAGE STACK MONITORING - A system and method for developing highly accurate measurements by calibrating monitoring units with the known accurate measurements of an adjacent monitoring unit, thereby limiting the number of accurate references needed to accurately read a component stack. In a voltage stack having multiple packs with multiple cells per pack, a voltage reference with a known accuracy may be associated with a single pack. A monitoring unit may measure the overall voltage of the first pack and the combined voltage potential of the first pack and an adjacent pack. A second monitoring unit, having a different reference voltage, may then measure the overall voltage of the second pack. The two measurements of the second pack voltage may be compared and a correction factor may be calculated that may be used to correct subsequent measurements from the second pack. | 06-27-2013 |
20130162260 | METHOD AND CELL MONITORING UNIT FOR MONITORING A RECHARGEABLE BATTERY - A method for monitoring a rechargeable battery ( | 06-27-2013 |
20130169282 | DETECTION CIRCUITS FOR BATTERIES - A detection circuit includes a sensing unit, a signal reference source, and a detecting unit. The sensing unit provides a sensed signal by sensing an input signal representing a status of a battery. The signal reference source comprises a reference node and determines a signal reference at the reference node, and receives and is biased by the sensed signal at the same reference node to generate a trigger signal indicative of a difference between the sensed signal and the signal reference. The detecting unit is coupled to the signal reference source and generates an output signal according to the trigger signal to indicate an abnormal condition is present in the battery. | 07-04-2013 |
20130176033 | BATTERY PROTECTION DEVICE AND TESTING METHOD THEREOF - A battery protection device is disclosed in the present invention. The battery protection device includes a voltage detecting circuit and a controller coupled to the voltage detecting circuit. The voltage detecting circuit includes a testing unit, a switch coupled to the testing unit, a comparator coupled to an input voltage source and the switch for comparing a value of the input voltage source with a value of the switch, and a determining unit coupled to the comparator for outputting a determining signal when receiving a prompting signal from the comparator. The controller is for receiving an external testing command to switch the switch from a reference voltage source from a testing voltage source via the testing unit, so as to inspect whether the voltage detecting circuit is normal by the determining signal of the determining unit. | 07-11-2013 |
20130187659 | BATTERY SYSTEM FOR VEHICLE, ON-VEHICLE BATTERY MODULE, AND CELL CONTROLLER - A battery system for vehicle comprises a battery unit that is constituted with a plurality of serially connected cell groups each include a plurality of serially connected battery cells, integrated circuits that are each disposed in correspondence to one of the cell groups of the battery unit and each measure terminal voltages at the battery cells in the corresponding cell group, and a signal transmission path through which one of the integrated circuits is connected to another one of the integrated circuits or to a circuit other than that of the integrated circuits. | 07-25-2013 |
20130187660 | VOLTAGE MEASURING APPARATUS FOR PLURAL BATTERY - In a voltage measuring apparatus for a plural battery according to the present invention, each of voltage detecting ICs ( | 07-25-2013 |
20130234719 | VOLTAGE MONITORING APPARATUS FOR PLURAL BATTERY - A fail signal indicating overcharge/overdischarge of unit cells detected by voltage detecting ICs ( | 09-12-2013 |
20130241565 | METHOD FOR ESTIMATING VEHICLE BATTERY PARAMETERS - A method and system for accurately estimating one or more vehicle battery parameters, such as state-of-charge (SOC). In an exemplary embodiment, a battery control module gathers standard battery readings for estimating SOC at a relatively slow sampling rate. The battery control module receives adjustment data from one or more control modules located around the vehicle, where the control modules gather readings at faster sampling rates and then provide the information to the slower battery control module. The adjustment data from the faster control modules is representative of energy consumption and/or generation events that occur in between the readings taken by the battery control module at the slower sampling rate, and enable the method to make a more accurate and complete estimate of SOC. | 09-19-2013 |
20130241566 | SEMICONDUCTOR CIRCUIT, BATTERY MONITORING SYSTEM, AND DIAGNOSIS METHOD - A semiconductor circuit, battery monitoring system, diagnostic program and diagnosis method are provided enabling appropriate self-diagnosis of a measurement unit. An output value (A-B) output through respective power supply lines V (Vn, Vn−1), a cell selector switch, and a level shift circuit from an AD converter and an output value (B) of a directly input reference voltage B output from the AD converter are summed together. Diagnosis is made that no abnormality such as a defect has occurred when the summed value is substantially the same as a reference voltage A. | 09-19-2013 |
20130257443 | SEMICONDUCTOR DEVICE AND BATTERY MONITORING SYSTEM - A semiconductor device including: lines connected to lines between respective neighboring battery cells of plural battery cells connected in series; at each of the battery cells, a voltage detection portion that detects a battery voltage value of the battery cell based on a voltage provided by the lines connected to the high potential side of the battery cell and to the low potential side of the battery cell; and at each of the lines, a regulation portion that regulates current to make a first current and a second current cancel out, the first current being caused to flow in a first direction in the resistor element by the battery cell at the high potential side of the line, and the second current being caused to flow in a second direction in the resistor element by the battery cell at the low potential side of the line. | 10-03-2013 |
20130265058 | BATTERY MONITORING SYSTEM USING TIME-BASED SIGNALS - Systems and methods for monitoring a battery stack having a plurality of cells are provided. One system includes a plurality of time delay circuits. Each of the time delay circuits is electrically coupled to at least one of the plurality of cells. The time delay circuits are configured to execute a time delay in response to receiving a trigger signal and output a time delay marking signal indicating that the time delay has elapsed. The time delay is based on a voltage of the cell(s) to which the respective time delay circuit is electrically coupled. The system further includes a control circuit configured to receive the time delay marking signal from each of the time delay circuits and, for each received time delay marking signal, to determine the voltage of the at least one of the plurality of cells associated with the respective time delay marking signal. | 10-10-2013 |
20130265059 | System and Method for Verifying a Reference Voltage for Battery Cell Monitoring - Systems and methods for verifying a reference voltage within a battery pack are disclosed. In one example, an assessment of a reference voltage is made via a band-gap voltage of a microcontroller. The system and method may be particularly useful determining whether or not the reference voltage has drifted from a desired voltage. | 10-10-2013 |
20130285667 | VOLTAGE DETECTION CIRCUIT - A voltage detection circuit for a secondary battery. A secondary battery is composed of a plurality of battery blocks (B | 10-31-2013 |
20130307550 | STATE OF CHARGE INDICATORS FOR BATTERY PACKS - A state-of-charge (SOC) indicator for a battery pack is provided. The operation of the indicator is changed from a first mode to a second mode if a mechanism is activated, and is changed to a third mode if the mechanism remains activated after a timer expires. The indicator consumes a first amount of power in the second mode, and consumes a second amount of power which is less than the first amount in the third mode. The indicator blinks with a regular frequency when the SOC is less than a threshold. A comparator compares a divided signal and a reference signal during a first time interval, and the indicator displays the SOC based upon the comparison result during a second time interval separated from the first time interval. | 11-21-2013 |
20130314095 | BATTERY DEGRADATION DETERMINING DEVICE - A battery block | 11-28-2013 |
20130320990 | DEVICE AND METHOD FOR EQUALIZING CURRENT DRAIN FROM A BATTERY STACK - Embodiments of the present invention may provide a battery monitor for a battery system that avoids current loops. A battery monitor may be provisioned as an integrated circuit and may include a pair of supply pins for reception of power to the integrated circuit, a third high impedance pin, and a voltage regulation circuit. When the circuits are deployed, the supply pins of several battery monitors may be connected to each other to form a stack. The high impedance inputs of each battery monitor may be coupled to low voltage terminals of an associated battery cell. A voltage reference circuit within the battery monitor may maintain the voltage at a low voltage supply of the monitors at a level that matches the voltage present on the high impedance input. Thus, the voltages on the monitors' low voltage supplies may be regulated. As a result, no current should flow through the high impedance pins of the battery monitor. All current flow should occur through a single loop that extends through the entire stack of battery monitors. | 12-05-2013 |
20130328567 | BATTERY-TYPE DETERMINATION APPARATUS, BATTERY-TYPE DETERMINATION METHOD, AND ELECTRONIC APPARATUS - A battery-type determination apparatus includes a battery installation unit equipped with battery connection terminals in which a battery is installed, a voltage detector that detects a voltage generated by Seebeck effect between a battery connection terminal and an electrode of the battery, a temperature rise controller that raises a temperature at a contact point between the electrode of the battery and the battery connection terminal, and a type determination unit that determines a type of the battery installed in the battery installation unit, based on the voltage detected by the voltage detector with the temperature risen at the contact point. | 12-12-2013 |
20130342212 | DIAGNOSTIC DEVICE FOR DEGRADATION OF RECHARGEABLE LI-ION BATTERY - A diagnostic device which can measure quickly and has simple circuit is provided. A charge/discharge circuit | 12-26-2013 |
20140015535 | DEVICES, SYSTEMS, AND METHODS FOR BATTERY CELL FAULT DETECTION - A battery cell assembly includes a battery cell, a pouch, and a conductive lead. The pouch surrounds the battery cell and includes an inner insulative jacket, an outer insulative jacket, and a conductive foil disposed between the inner and outer insulative jackets. The conductive lead extends through the outer insulative jacket and is electrically coupled to the conductive foil. The conductive lead is configured to electrically couple to battery circuitry for monitoring a voltage on the conductive foil to determine a fault condition. The battery circuitry may include measurement circuitry for measuring the voltage on the conductive foil and logic circuitry for determining a fault condition based on the measured voltage. | 01-16-2014 |
20140028322 | Battery System having Battery Contactors and a Diagnostic Device for Monitoring the Functional State of the Contactors and Associated Diagnostic Method - A battery system comprises a battery including a plurality of battery cells and can be connected on an input side to a direct voltage intermediate circuit via at least one contactor, and a diagnostic device configured to diagnose a state of the at least one contactor. The battery system includes a monitoring circuit with a first branch in which the at least one contactor is arranged, and a second branch which is connected parallel thereto and in which a voltage source configured to generate a reference voltage is connected. The diagnostic device is arranged so as to evaluate a diagnostic current which is dependent on the reference voltage and flows in the monitoring circuit, and serves to determine a fault state of the at least one contactor based on a measured current value or a current profile of the diagnostic current. | 01-30-2014 |
20140043031 | System and Device for Determining Electric Voltages - A method and to a system can be used for measuring electric voltages in batteries with a number of battery cells. A measuring circuit includes at least one digital analog converter that constitutes, in combination with a number of comparators, an analog digital converter to determine the electric voltages of the battery cells. The comparators compare a reference voltage generated by the digital analog converter with the electric voltage of the battery cells over a number of separate measuring channels to the individual battery cells. | 02-13-2014 |
20140055144 | DETERMINATION SYSTEM AND DETERMINATION METHOD FOR DETERMINING WHETHER METAL LITHIUM IS PRECIPTATED IN A LITHIUM ION SECONDARY BATTERY, AND VEHICLE EQUIPPED WITH THE DETERMINATION SYSTEM - A determination system for determining whether metal lithium is precipitated in a lithium ion secondary battery includes: a discharging unit that causes the lithium ion secondary battery to perform constant current discharge until a voltage of the lithium ion secondary battery becomes a voltage corresponding to a predetermined low state of charge; a natural increase acquisition unit that acquires a natural increase in voltage of the lithium ion secondary battery after the constant current discharge is terminated; and a precipitation determining unit the compares the acquired natural increase with a predetermined threshold, that determines that the metal lithium is not precipitated when the natural increase is larger than or equal to the threshold, and that determines that the metal lithium is precipitated when the natural increase is smaller than the threshold. | 02-27-2014 |
20140077818 | METHODS FOR TESTING LITHIUM ION BATTERY AND EVALUATING SAFETY OF LITHIUM ION BATTERY - A method for testing a lithium ion battery is disclosed. An under-test lithium ion battery including a cathode active material is provided. A reference voltage value is set according to the cathode active material. The under-test lithium ion battery is over charged, while an actual voltage change of the under-test lithium ion battery is tested during the over charging. A maximum voltage value is recorded before a first decrease in the actual voltage change of the under-test lithium ion battery during the over charging. The maximum voltage value is compared with the reference voltage value. A method for evaluating a safety of a lithium ion battery is also disclosed. | 03-20-2014 |
20140152317 | SYSTEMS AND METHODS TO PROTECT AGAINST OVER-DISCHARGE IN A BATTERY SYSTEM - A battery system may include a plurality of subdivisions, such as battery cells or sub-packs. A measurement system configured to determine a subdivision electrical parameter associated with each of a plurality of subdivisions. A battery control may identify a subdivision satisfying a criterion based on the plurality of subdivision electrical parameters. According to some embodiments, the battery control system may determine a ratio of the subdivision electrical parameter of the identified subdivision to the electrical parameter of the battery pack. The ratio may be used to scale the electrical parameter associated with the battery pack by the ratio. According to other embodiments, the subdivision electrical parameter associated with the identified subdivision may be provided to a battery state estimation system. The scaled electrical parameter or the electrical parameter associated with the identified subdivision may be used by a battery state estimation system to generate an estimated battery state. | 06-05-2014 |
20140184236 | BATTERY CONTROL APPARATUS AND BATTERY SYSTEM - A battery control apparatus which can calculate a state of charge of a battery with high accuracy is provided. The battery control apparatus of the invention determines whether or not an open circuit voltage of a battery cell is within a high sensitivity range in which the open voltage of the battery cell changes by a specified amount or more with respect to a change in the state of charge of the battery cell, and if within the high sensitivity range, calculates the state of charge by using a previously held correspondence relation table between the state of charge of the battery and the open voltage, and if not within the high sensitivity range, uses a previous state of charge calculation result stored in a storage part. | 07-03-2014 |
20140210482 | METHOD AND APPARATUS FOR REDUCING COMMON MODE VARIATIONS IN A VOLTAGE SENSING COMPONENT - A method and apparatus that reduce common mode variations experienced by a voltage sensing component. A measurement component such as a BATFET or an external sensing resistor, receives, at its source, a voltage from the top of a battery having a voltage VPH_PWR. A voltage sensing component, such as an ADC, is powered by the voltage from the battery. A power referenced component, such as a power referenced LDO, tracks the voltage from the battery and outputs the tracked voltage minus a predetermined voltage amount to a negative side of the voltage sensing component. | 07-31-2014 |
20140239964 | BATTERY SYSTEM AND MANAGEMENT METHOD - A system and method for monitoring the status of a system of battery strings is described. The battery string current is measured by a current sensor urged into contact with a metallic element in which the battery string current is flowing. The time history of the battery string current and voltage is interpreted to determine whether the battery string is discharging, charging or in a fully charged state. A moving average current in the charging state is used to establish a threshold for determining whether a thermal runaway condition exists. The moving average is maintained at the value that existed at a time when the battery string has been disconnected from the system current bus. | 08-28-2014 |
20140239965 | BATTERY CELL SCANNING SYSTEMS AND METHODS - Systems and methods for scanning a battery cell to identify internal faults are disclosed. In certain embodiments, a method for scanning a battery cell for faults may comprise generating an input signal across first and second charge plates disposed on each side of the battery cell. An open circuit voltage of the battery cell generated in response to the input signal may be measured. The measured open circuit voltage may be compared with a reference signal associated with a reference battery cell having no faults. Based on the comparison, a fault and/or a possible fault within the battery cell being scanned may be identified. | 08-28-2014 |
20140285208 | METHOD FOR INSPECTING BATTERY - A method for inspecting a battery, comprising: a first withstanding voltage determination step of housing an electrode laminate within a package and applying a first voltage between a positive electrode terminal and a negative electrode terminal to perform a first withstanding voltage determination in a state in which an electrolyte solution is not poured in the package; and a second withstanding voltage determination step of applying a second voltage which is higher than the first voltage between the positive electrode terminal or the negative electrode terminal and metallic layers of pair of laminate films to perform a second withstanding voltage determination in the state in which the electrolyte solution is not poured in the package. | 09-25-2014 |
20140300366 | ELECTRICAL DEVICE SYSTEM AND BATTERY PACK - An electrical device system having a battery pack, an electrical device, and a charging device, includes: a current detecting unit that detects a battery current flowing through the battery during a charge to or a discharge from the battery; a battery state detecting unit that detects at least one of a battery voltage and a temperature of a heat generating unit; and a determining unit that estimates an amount of change in at least one of the battery voltage and the temperature of the heat generating unit, based on the battery current, and calculates an amount of actual change in at least one of the battery voltage and the temperature of the heat generating unit, wherein the determining unit determines that the current detecting unit is abnormal, when the difference between the calculated amount of actual change and the estimated amount of change is a default value or more. | 10-09-2014 |
20140368208 | CELL STATE ESTIMATION DEVICE - After discharging has been stopped, a transient response component of the voltage remaining in the cell unit is calculated as an initial remaining voltage value (V | 12-18-2014 |
20150048839 | BATTERY FUEL GAUGE CALIBRATION - Accurate charge measurement based on a calibration factor is described. According to certain aspects, the amount of charge stored in a battery is accumulated over time and adjusted using a calibration factor. In one embodiment, the calibration factor is determined by generating a replica current which comprises a scaled factor of a battery charging current. A calibration reference voltage is measured based on the replica current, and a charge reference voltage is measured based on the battery charging current. A calibration factor is determined based on the charge reference voltage and the calibration reference voltage. In turn, the amount of charge in a battery is accumulated over time using the calibration factor. In various embodiments, the calibration factor provides a factor by which a relatively-low tolerance reference circuit is adjusted, to achieve higher accuracy without substantially increased cost. | 02-19-2015 |
20150077128 | METHOD FOR SENSING OPEN STATE OF BATTERY OF ELECTRONIC PARKING BRAKE SYSTEM - Disclosed is a method for sensing an open state of a battery of an electronic parking brake system, including: setting a target voltage value of the battery; judging an operation state of an EPB; applying current to a motor so as to prevent an operation state of the EPB from being changed according to the operation state of the EPB; measuring a present voltage value of the battery; comparing the target voltage value of the battery and the present voltage value; and recognizing, when the present voltage value is equal to or smaller than the target voltage value, the opening as an opening error of the battery. | 03-19-2015 |
20150102819 | LITHIUM-ION ENERGY STORE WITH MEASURING CELL AND METHODS FOR DETERMINING PROPERTIES OF THE LITHIUM-ION ENERGY STORE - A lithium-ion energy store ( | 04-16-2015 |
20150323609 | BATTERY MONITORING DEVICE AND BATTERY SYSTEM MONITORING DEVICE - A battery monitoring device for monitoring a cell group made by connecting a plurality of single battery cells in series includes a reference voltage generation circuit configured to generate a variable reference voltage, a switching circuit configured to select, as a measurement target voltage, any one of a plurality of types of voltages including the cell voltages of the single battery cells in the cell group and the reference voltage, and an AD converter configured to measure the measurement target voltage which is selected by the switching circuit, and output a digital signal according to the measurement result. | 11-12-2015 |
20150331061 | MULTI-PHASE POWER METER CONFIGURED FOR MONITORING GENERATOR BATTERY VOLTAGE - Disclosed herein are embodiments of systems and methods for determining the state of health of a generator battery set and its ability to supply generator starter motor with start-up energy by capturing a profile of voltage across terminals of the battery during a supply of electrical energy from the battery to the starter and comparing the captured voltage profile to a reference voltage profile to determine if a difference between the captured voltage profile and reference voltage profile exceeds an acceptable amount. | 11-19-2015 |
20150377979 | METHOD FOR TESTING AN ENERGY STORE IN A MOTOR VEHICLE - A motor vehicle has a first energy store for the operation of multiple vehicle systems and a second energy store which, at least, provides the electrical energy needed to start the motor vehicle, and a control device. A method for testing a first energy store includes connecting the first energy store to a load having a lower impedance than the minimum total impedance of a parallel circuit composed of a fixed selection of the vehicle systems for a fixed time interval by means of the control device, measuring a voltage dropping on the first energy store by means of the voltage measuring device, at least once within the time interval, and outputting a signal by means of the control device if the voltage falls below a predefined limiting value, | 12-31-2015 |
20160003919 | BATTERY VOLTAGE PROFILE MONITORING DURING GENERATOR START - Disclosed herein are embodiments of systems and methods for determining the state of health of a generator battery set and its ability to supply generator starter motor with start-up energy by capturing a profile of voltage across terminals of the battery during a supply of electrical energy from the battery to the starter and comparing the captured voltage profile to a reference voltage profile to determine if a difference between the captured voltage profile and reference voltage profile exceeds an acceptable amount. | 01-07-2016 |
20160069964 | BATTERY STATE DETECTION DEVICE - In a battery state detection device, a μCOM detects that, during charge by a charge part, a voltage between both electrodes of a secondary battery has reached a predetermined measurement start voltage set higher than a voltage between the both electrodes of the secondary battery at the time of complete discharge, and detects that, during the charge by the charge part, the voltage between the both electrodes of the secondary battery has reached a predetermined measurement finish voltage set higher than the measurement start voltage. Then, the μCOM measures an amount of integrated power given to the secondary battery in a period from the detection of the measurement start voltage to the detection of the measurement finish voltage, and detects an SOH of the secondary battery based on the amount of integrated power measured by integrated power amount measurement unit. | 03-10-2016 |
20160154064 | Switching status check with circuit parts of an insulation monitor | 06-02-2016 |
20160161367 | DEVICE AND METHOD FOR DETECTING VEHICLE ENGINE STATE - A device for detecting a vehicle engine state includes a power input terminal and a power monitoring unit. The power input terminal is electrically connected to a battery. The power monitoring unit is electrically connected to the power input terminal and configured to detect a battery voltage of the battery and to update a standby threshold voltage predefined in the power monitoring unit according to a standby level of the battery in a steady state whenever an engine shuts down. The power monitoring unit is configured to compare the detected battery voltage and the updated standby threshold voltage, and to determine if the engine is activated according to a result of the comparison. A vehicle engine state detecting method is also disclosed herein. | 06-09-2016 |
20160161563 | Devices for Measuring Voltage of a Power Supply, Detection Devices, and Temperature Controllers - Disclosed are exemplary embodiments of devices for measuring voltage of a power supply. Also disclosed are exemplary embodiments of detection devices and temperature controllers comprising such devices for measuring voltage of a power supply. In exemplary embodiments, a device for measuring the voltage of a power supply generally includes a resistor, a capacitor, and a control unit. One end of the capacitor is connected with the resistor, while the other end of the capacitor is connected to ground. The control unit is connected with the power supply. The control unit includes a comparator connected with the capacitor, a reference power supply connected with the comparator, a timer, and a computing unit. | 06-09-2016 |
20160202323 | SYSTEM FOR ESTIMATING STATE OF HEALTH OF BATTERY OF ELECTRIC VEHICLE | 07-14-2016 |