Patent application number | Description | Published |
20100026241 | APPARATUS AND METHOD FOR BALANCING OF BATTERY CELL'S CHARGE CAPACITY - An apparatus for balancing charge capacity of battery cell includes a voltage sensing/discharging circuit having a battery with cell group, a switching unit for selectively connecting both terminals of each battery cell to conductive lines, capacitor connected to the conductive lines, a voltage amplifying unit connected to both terminals of capacitor via a first switch, and a discharge resistance connected to both terminals of capacitor via a second switch; and a voltage balancing unit for controlling the switching unit in ON state of first switch to connect both terminals of each battery cell to the conductive lines and then sense voltage of each battery cell through the voltage amplifying unit, and controlling the switching unit in OFF state of first switch to charge voltage of balancing-requiring cell to the capacitor and then turning on the second switch to discharge charged voltage of capacitor through the discharge resistance. | 02-04-2010 |
20100085009 | CELL BALANCING APPARATUS AND METHOD - Disclosed is a cell balancing apparatus and method using a voltage variation pattern of a battery cell, which measures voltage of each cell, estimates OCV or SOC of each cell using a voltage variation pattern of each cell including a present voltage and a past voltage, and eliminates a deviation in OCV or SOC between the cells through comparison of the estimated OCV or SOC of each cell. In estimating the OCV of each cell, an output voltage error due to IR drop is corrected. Thus, SOC of each cell may be accurately estimated. And, an accurate estimation of SOC may render substantial elimination for a SOC deviation of each cell. Furthermore, SOC estimating using an output voltage leads to an active cell balancing even during charge and discharge of battery, thereby minimizing an SOC deviation of each cell. | 04-08-2010 |
20100174499 | APPARATUS FOR ESTIMATING OPEN CIRCUIT VOLTAGE OF BATTERY, APPARATUS FOR ESTIMATING STATE OF CHARGE OF BATTERY, AND METHOD FOR CONTROLLING THE SAME - An apparatus for estimating an OCV of a battery includes a voltage sensing unit for measuring a battery output voltage; a temperature sensing unit for measuring a battery temperature; a data storing unit for periodically receiving the battery output voltage and temperature data from the sensing units and storing the data in a memory; an OCV variation estimating unit for calculating an OCV variation from a varying pattern of battery output voltages measured in the past and at the present, stored in the memory, by applying a mathematical model defining a correlation between the varying pattern and the OCV variation, and estimating an OCV at a current stage by reflecting a correction factor corresponding to the battery temperature on the calculated OCV variation; and an OCV estimating unit for estimating an OCV at the current stage by reflecting the estimated OCV variation on the OCV estimated at a last stage. | 07-08-2010 |
20100253287 | APPARATUS FOR BALANCING OF BATTERY PACK HAVING FUNCTION OF PREVENTION OF OVER-DISCHARGE - An apparatus balances a charging voltage of each battery cell of a battery pack. The apparatus includes a discharge resistor installed on a conductive line connected to both ends of a battery cell in parallel; a balance signal relay unit for relaying a charging voltage of the battery cell according to a balance control signal; and a discharge switching unit for receiving the relayed charging voltage of the battery cell as a driving voltage and connecting the battery cell to the discharge resistor to discharge the battery cell if the driving voltage is over an effective voltage level. This apparatus prevents overcharging of a battery cell, caused by a failure of a control processor, while balancing a charging voltage of battery cells. Also, the control processor may be protected against an electric impact by electrical insulation from a discharge circuit. Accordingly, the safety of the battery pack is improved. | 10-07-2010 |
20100324848 | APPARATUS AND METHOD FOR TESTING STATE OF CHARGE IN BATTERY - Disclosed is an apparatus and method for estimating a state of charge (SOC) in a battery, in which the battery SOC is estimated using a fusion type soft computing algorithm, thereby accurately estimating the battery SOC in a high C-rate environment. The apparatus includes a detector unit for detecting current, voltage and temperature of a battery cell; and soft computing unit for outputting a battery SOC estimation value of processing the current, the voltage and the temperature detected by the detector unit using a radial function based on a neural network algorithm. Especially, the soft computing unit combines the neural network algorithm with any one of a fuzzy algorithm, a genetic algorithm (GA), a cellular automata (CA) algorithm, an immune system algorithm, and a rough-set algorithm, and thereby adaptively updates the parameters of the neural network algorithm. | 12-23-2010 |
20110032653 | APPARATUS AND METHOD FOR CONTROLLING A RELAY IN ELECTRIC DRIVE VEHICLE - Disclosed is a relay control apparatus and method for electric drive vehicles. The apparatus controls turn-off of a relay operative to connect an electric drive unit with a battery pack for supplying electrical power to the electric drive unit, and comprises a current sensor for measuring and outputting a residual current flowing between the battery pack and the electric drive unit; and a controller for, in a situation requiring turn-off of the relay, receiving the measured residual current value, comparing the measured residual current value with a reference value for the residual current, and controlling to maintain the ON-state of the relay or to turn off the relay on the basis of the comparison results. | 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 |
20110204898 | APPARATUS AND METHOD FOR MEASURING CURRENT AND VOLTAGE OF SECONDARY BATTERY PACK IN SYNCHRONIZATION MANNER - Provided is an apparatus for measuring current and voltage of a secondary battery pack in synchronization manner, comprising a voltage measurement circuit for periodically measuring and outputting the level of a charging voltage of each of a plurality of battery cells contained in a battery pack; a current measurement circuit for periodically measuring and outputting the level of current flowing into or out of the battery pack; and a control unit for synchronizing a time difference between a current measurement time point of the battery pack and a voltage measurement time point of each battery cell with a reference delay time. | 08-25-2011 |
20120074906 | APPARATUS AND METHOD FOR BALANCING CHARGE CAPACITY OF BATTERY CELL - An apparatus for balancing charge capacity of battery cell includes a voltage sensing/discharging circuit having a battery with cell group, a switching unit for selectively connecting both terminals of each battery cell to conductive lines, capacitor connected to the conductive lines, a voltage amplifying unit connected to both terminals of capacitor via a first switch, and a discharge resistance connected to both terminals of capacitor via a second switch; and a voltage balancing unit for controlling the switching unit in ON state of first switch to connect both terminals of each battery cell to the conductive lines and then sense voltage of each battery cell through the voltage amplifying unit, and controlling the switching unit in OFF state of first switch to charge voltage of balancing-requiring cell to the capacitor and then turning on the second switch to discharge charged voltage of capacitor through the discharge resistance | 03-29-2012 |
20120191390 | APPARATUS FOR ESTIMATING OPEN CIRCUIT VOLTAGE OF BATTERY, APPARATUS FOR ESTIMATING STATE OF CHARGE OF BATTERY, AND METHOD FOR CONTROLLING THE SAME - An apparatus for estimating an OCV of a battery includes a voltage sensing unit for measuring a battery output voltage; a temperature sensing unit for measuring a battery temperature; a data storing unit for periodically receiving the battery output voltage and temperature data from the sensing units and storing the data in a memory; an OCV variation estimating unit for calculating an OCV variation from a varying pattern of battery output voltages measured in the past and at the present, stored in the memory, by applying a mathematical model defining a correlation between the varying pattern and the OCV variation, and estimating an OCV at a current stage by reflecting a correction factor corresponding to the battery temperature on the calculated OCV variation; and an OCV estimating unit for estimating an OCV at the current stage by reflecting the estimated OCV variation on the OCV estimated at a last stage. | 07-26-2012 |
20130063088 | SYSTEM AND METHOD FOR CHARGING BATTERY PACK - Disclosed are a system and method for charging a battery pack. The system uses a recovery vehicle to quickly charge a vehicle battery pack. The system includes a charging power supply module equipped in the recovery vehicle, quick charging power lines placed in the vehicle battery pack, a quick charge switch placed in the quick charging power lines, and a control module. | 03-14-2013 |
20140218041 | METHOD AND APPARATUS FOR ESTIMATING MAXIMUM POWER OF BATTERY BY USING INTERNAL RESISTANCE OF THE BATTERY - Disclosed is a method for estimating the maximum power of a battery, which can inexpensively perform an estimation of the maximum power of a battery in a relatively simple manner of using the internal resistance of the battery, which has a correlation with and a largest effect on the maximum power of the battery. The method includes the steps of: measuring an internal resistance and a temperature of the battery and estimating a state of charge, if an estimation of the maximum power of the battery is requested; and reading a value of the maximum power of the battery, which corresponds to the measured temperature, the estimated state of charge, and the measured internal resistance, from a table in which the internal resistances and the maximum powers of the battery are mapped according to the temperatures and states of charge. | 08-07-2014 |
Patent application number | Description | Published |
20110115789 | IMAGE DISPLAYING APPARATUS AND IMAGE SIGNAL PROCESSING METHOD OF THE SAME - Disclosed is an image displaying apparatus for displaying a received three-dimensional (3D) image signal as a two-dimensional (2D) image or a 3D image, and a method for performing the same. In the method, the 3D image signal is divided into left and right eye signals. Based on a user's selection, the 3D image signal is either displayed as the 3D image, by alternately displaying the left and right eye signals, or displayed as the 2D image, by consecutively displaying either the left eye signals or the right eye signals. | 05-19-2011 |
20110115890 | SHUTTER GLASSES FOR STEREOSCOPY, IMAGE DISPLAY SYSTEM COMPRISING THE SAME AND CONTROL METHOD THEREOF - Disclosed are shutter glasses for viewing a stereoscopic image including: a left-eye shutter; a right-eye shutter; and a controller which generates an error signal indicating an error if at least one of a first and a second error condition exists, wherein the first error condition is internal to the shutter glasses, and the second error condition is external to the shutter glasses. | 05-19-2011 |
20110128357 | STEREOSCOPIC GLASSES, DISPLAY DEVICE AND DRIVING METHOD OF THE SAME - Disclosed are a display device and a driving method of the same, the display device including: a receiver; a signal processor which processes a video signal; a display unit which displays a stereoscopic image based on the video signal; a sync signal output unit which outputs a sync signal to stereoscopic glasses so that left eye shutter and right eye shutter are opened and closed corresponding to left eye image and right eye image displayed on the display unit; a power supply; and a controller which outputs the sync signal at an initial mode, controls the sync signal output unit so that a power saving mode and a check mode are alternately repeated, and controls the power supply to stop supplying power to the sync signal output unit during the power saving mode, so the sync signal can be selectively output to stereoscopic glasses, thereby reducing power consumption. | 06-02-2011 |