Patent application number | Description | Published |
20080215199 | VEHICLE-USE DUAL VOLTAGE TYPE POWER SUPPLY APPARATUS - The vehicle-use dual voltage type power supply apparatus including a high voltage power supply system and a low voltage power supply system has a configuration that the target power generation cost is calculated individually for each of the two power supply systems in accordance with SOC as a variable of its own battery, so that the electricity cost reduction type power generation control can be performed individually for each of the two power supply systems. | 09-04-2008 |
20090078400 | TEMPERATURE CONTROL DEVICE FOR ON-BOARD BATTERY PACK - A temperature control device has a heat exchanger recovering heat from exhaust gas of an engine, a water circulating passage in which a cooling water is circulated while receiving the recovered heat, an air conditioning unit heating air with the hot cooling water of the passage to produce a temperature controlled air, an air duct, a water heater attached to the bottom surface of a battery pack, and an electric heater attached side surfaces of the pack. The conditioning unit blows the controlled air against the battery pack through the duct. The water heater receives the hot cooling water of the passage and raises the temperature of the battery pack. The electric heater subsidiarily warms the battery pack with heat generated from electric power of the pack. | 03-26-2009 |
20090195430 | ANALOG-TO-DIGITAL CONVERTING APPARATUS WITH LOWER TEMPERATURE DEPENDENCE - In an A/D converting apparatus, a converting unit has an input terminal and an input-output characteristic. The input-output characteristic has temperature dependence, and the converting unit carries out a process of converting an input voltage signal to digital data. A temperature determining unit has information representing a relationship between a variable of an output of the converting unit and a variable of a temperature around the converting unit according to the temperature dependence of the input-output characteristic of the converting unit. When the specified voltage is applied to the input terminal of the converting unit, the temperature determining unit determines a value of the temperature around the converting unit based on the information and the specified voltage. A reducing unit reduces temperature dependence of the process of converting an input voltage signal to digital data based on the determined value of the temperature around the converting unit. | 08-06-2009 |
20090251103 | VOLTAGE DETECTING APPARATUS WITH VOLTAGE CONTROLLED OSCILLATOR AND BATTERY STATE CONTROL SYSTEM - In a voltage detecting apparatus, a voltage controlled oscillator, when an input voltage is applied thereto, outputs a signal with a logical value that is periodically inverted. A detector counts a number of logical inversion of the output signal from the voltage controlled oscillator over an interval between edges of pulses of a pulse signal to thereby generate, based on the counted number of logical inversion, digital data as a detected result of the input voltage. A determiner determines whether a reduction of a time required to detect the input voltage is higher in priority than an increase of a resolution of detection of the input voltage. A variably setting unit variably sets a frequency of the pulse signal based on a result of the determination of whether the reduction of the time required to detect the input voltage is higher in priority than the increase of the resolution of detection of the input voltage. | 10-08-2009 |
20110001352 | POWER SOURCE APPARATUS FOR VEHICLE - A power source apparatus mounted to a vehicle is equipped with a lead-acid battery and a lithium battery. An open circuit voltage and an internal resistance of each of the batteries are determined to satisfy the following conditions (a1), (a2), and (a3): (a1) In the use range of SOC of the lead-acid battery and the use range of SOC of the lithium battery, there is an equal voltage point Vds at which the open circuit voltage V | 01-06-2011 |
20110025271 | STATE MONITORING APPARATUS FOR ASSEMBLED BATTERY - The state monitoring apparatus includes a high-voltage side monitoring section having monitoring units assigned to respective unit batteries and a low-voltage side monitoring section having a control device. The monitoring units measures the voltages of the unit batteries upon reception of a voltage measurement command transmitted from the control device, and determines whether or not the measured voltages are within a predetermined range. This determination is transmitted to the control device. If this determination is negative, the control device limits a charge/discharge current of the assembled battery, and then causes the monitoring units to transmit the measured voltages. | 02-03-2011 |
20110043393 | DEVICE FOR CONVERTING ANALOG SIGNAL INTO DIGITAL VALUES AND CORRECTING THE VALUES - An analog to digital converting device has a first converter nonlinearly converting an analog level into a first digital value every first sampling period, shorter than a second sampling period, with low precision, a second converter linearly converting the analog level into a second digital value every second sampling period with high precision, and a controller determining a correction equation by using the second digital value having a high precision in each second sampling period so as to renew the equation every second sampling period, and correcting the first digital values, obtained in each second sampling period, to corrected digital values according to the corresponding correction equation to output the corrected digital value as a digital value, obtained by substantially linearly converting the analog level, every first sampling period. | 02-24-2011 |
20110260544 | POWER SUPPLY UNIT HAVING PLURALITY OF SECONDARY BATTERIES - The power supply unit includes a lead secondary battery (first battery) that is capable of being charged with power generated by an alternator (power generator); a lithium secondary battery (second battery) that is electrically connected in parallel to the lead secondary battery, capable of being charged with power generated by the alternator (power generator), and has higher output density or higher energy density than the lead secondary battery; and a switching means that is electrically connected between the alternator and the lead secondary battery, and the lithium secondary battery, and switches between conduction and blocking. The switching means is configured by a plurality of MOS-FETs (semiconductor switches) being connected in series such that respective parasitic diodes present in the semiconductor switches face opposite directions. | 10-27-2011 |
20140091767 | POWER SOURCE APPARATUS FOR VEHICLE - A power source apparatus mounted to a vehicle is equipped with a lead-acid battery and a lithium battery. An open circuit voltage and an internal resistance of each of the batteries are determined to satisfy the following conditions (a1), (a2), and (a3): (a1) In the use range of SOC of the lead-acid battery and the use range of SOC of the lithium battery, there is an equal voltage point Vds at which the open circuit voltage V0 (Pb) of the lead-acid battery becomes equal to the open circuit voltage V0 (Li) of the lithium battery; (a2) The relationship of V0 (Li)>V0 (Pb) is satisfied in the upper limit side of the use range of SOC of the battery; and (a3) A terminal voltage Vc (Li) of the lithium battery is not more than a set voltage Vreg of a regulator when a maximum current flows in the lithium battery. | 04-03-2014 |