Abstract: A power supply device includes a main power supply, a sub-power supply, a main power supply path, a sub-power supply path, a power supply selector switch, and a load selector switch group. The main power supply path is connected to the main power supply. The sub-power supply path is different from the main power supply path and is connected to the sub-power supply. The load selector switch group is disposed between the main power supply path and the sub-power supply path, and the load unit, and performs switching so as to connect one of the main power supply path and the sub-power supply path to the load unit and to disconnect the other from the load unit, according to switching of the power supply selector switch.

Abstract: A power supply device includes a main power supply, a sub-power supply, a main power supply path, a sub-power supply path, a power supply selector switch, and a load selector switch group. The main power supply path is connected to the main power supply. The sub-power supply path is different from the main power supply path and is connected to the sub-power supply. The load selector switch group is disposed between the main power supply path and the sub-power supply path, and the load unit, and performs switching so as to connect one of the main power supply path and the sub-power supply path to the load unit and to disconnect the other from the load unit, according to switching of the power supply selector switch.

Abstract: One-side plates of first and second condensers are connected to a one-side electrode of one of a plurality of secondary cells. First switches connect the other-side electrode of the secondary cell to the other-side plate of one of the first condenser and the second condenser. An MCU controls the first switches to connect the other-side electrode of the secondary cell to the other-side plate of the first condenser when the plurality of secondary cells is in a first state, and then connect the other-side electrode of the secondary cell to the other-side plate of the second condenser when the plurality of secondary cells is in a second state. A differential amplifier circuit outputs a differential voltage of voltages of the other-side plates of the first condenser and the second condenser. A cell monitoring IC detects states of the secondary cells based on the differential voltage.

Abstract: A battery pack includes a high-voltage battery which includes a plurality of unit cells which are connected, a step-down circuit which is disposed between the high-voltage battery and a load, and steps-down voltage applied from the high-voltage battery, a control unit which executes step-down control so that the step-down circuit performs the step-down, and a casing which accommodates the high-voltage battery and the step-down circuit and the control unit.

Abstract: One-side plates of first and second condensers are connected to a one-side electrode of one of a plurality of secondary cells. First switches connect the other-side electrode of the secondary cell to the other-side plate of one of the first condenser and the second condenser. An MCU controls the first switches to connect the other-side electrode of the secondary cell to the other-side plate of the first condenser when the plurality of secondary cells is in a first state, and then connect the other-side electrode of the secondary cell to the other-side plate of the second condenser when the plurality of secondary cells is in a second state. A differential amplifier circuit outputs a differential voltage of voltages of the other-side plates of the first condenser and the second condenser. A cell monitoring IC detects states of the secondary cells based on the differential voltage.

Abstract: A battery state notifying unit, a bus bar module, a battery pack and a battery state monitoring system are provided, and allow for reduction of the number of electric wires guided to a unit monitoring a battery state, and the signal voltage applied to the electric wires. A battery power source system is provided with a battery state notifying unit corresponding to each battery pack. The battery state notifying unit generates battery state information indicating the electrode voltage and temperature of the battery cells 21, and transmits the battery state information to the battery state monitoring unit. The battery state information is based on a cell voltage signal corresponding to electrode voltage outputted from terminal fittings of the battery pack, and a cell temperature signal corresponding to voltage outputted from the temperature sensor.

Abstract: A voltage measurement device for measuring an output voltage of a battery assembly includes voltage addition sections that add a predetermined voltage value to output voltages of the cells, voltage detection sections that detect addition voltages which are output voltages of the voltage addition sections corresponding to the cells of the individual blocks, A/D converting sections that digitize analog voltage signals of the addition voltages detected by the voltage detection sections, and a control section that outputs voltage measurement request signals to the voltage detection sections respectively, and that acquires the addition voltages, subtracts the predetermined voltage value from the acquired addition voltages and provides voltage values after the subtractions, as the output voltages of the cells.

Abstract: A voltage measuring apparatus includes polarity detection units that are each provided for a respective one of cells to detect polarities of the voltages output from the cells, absolute value detection units that are each provided for the respective one of the cells to detect absolute values of the voltages, A/D conversion units that are each provided for a respective one of a plurality of blocks and which includes at least one cell, to digitalize the absolute values of the voltages in correspondence with the cell of the respective blocks, and voltage detection units that calculate the output voltages with the polarities for the respective cells based on the digitalized absolute values of the voltages and the polarities of the voltages to detect the total voltages of the output voltages with the polarities for each of the blocks.

Abstract: A voltage measurement device for measuring an output voltage of a battery assembly includes voltage addition sections that add a predetermined voltage value to output voltages of the cells, voltage detection sections that detect addition voltages which are output voltages of the voltage addition sections corresponding to the cells of the individual blocks, A/D converting sections that digitize analog voltage signals of the addition voltages detected by the voltage detection sections, and a control section that outputs voltage measurement request signals to the voltage detection sections respectively, and that acquires the addition voltages, subtracts the predetermined voltage value from the acquired addition voltages and provides voltage values after the subtractions, as the output voltages of the cells.

Abstract: [Problem to be Solved] To provide a battery state notifying unit, a bus bar module, a battery pack and a battery state monitoring system allowing the number of electric wires guided to a unit monitoring a battery state to reduce, and signal voltage applied to the electric wires to lower. [Solution] A battery power source system 1 is provided with a battery state notifying unit 40 corresponding to each the battery pack 10, wherein the battery state notifying unit 40 generating battery state information of digital signal including information indicating electrode voltage and temperature of the battery cells 21, and transmitting the battery state to the battery state monitoring unit 60, the information being based on cell voltage signal corresponding to electrode voltage outputted from terminal fittings 33 of the battery pack 10, and cell temperature signal corresponding to voltage outputted from temperature sensor 34.

Abstract: The battery voltage adjusting device includes: a voltage detecting means provided corresponding to a block including at least one unit cell of an on-vehicle high voltage battery consisting of a plurality of the unit cells connected in series and detecting a terminal voltage of the unit cell in the block; a charge-discharge means charging or discharging the unit cell in the block on the basis of the terminal voltage of the unit cell detected by the voltage detecting means; a temperature detecting means detecting a temperature of the unit cell; and a changing means changing a time period, from a time point when the charge-discharge means finishes to charge or discharge the unit cell to a time point when the voltage detecting means detects the terminal voltage of the unit cell, on the basis of the temperature of the unit cell detected by the temperature detecting means.

Abstract: The state-of-charge adjusting apparatus which enables to shorten a time to reach a capacity equalization is provided. A CPU extracts a block consisting of a plurality of unit cells connected continuously to each other, the plurality of the unit cells each having a voltage higher than a target voltage, and connects both ends of each block to a discharge resistance to make each block discharge. Thereafter, the CPU extracts a unit cell having a voltage higher than the target voltage and connects both ends of the extracted unit cell to the discharge resistance to make the extracted unit cell discharge until the voltage of the extracted unit cell reaches the target voltage.

Abstract: The battery voltage adjusting device includes: a voltage detecting means provided corresponding to a block including at least one unit cell of an on-vehicle high voltage battery consisting of a plurality of the unit cells connected in series and detecting a terminal voltage of the unit cell in the block; a charge-discharge means charging or discharging the unit cell in the block on the basis of the terminal voltage of the unit cell detected by the voltage detecting means; a temperature detecting means detecting a temperature of the unit cell; and a changing means changing a time period, from a time point when the charge-discharge means finishes to charge or discharge the unit cell to a time point when the voltage detecting means detects the terminal voltage of the unit cell, on the basis of the temperature of the unit cell detected by the temperature detecting means.

Abstract: Providing a charge condition adjusting apparatus, which can shorten a time for equalization of each charge in unit cells, a low-voltage CPU selects each smallest unit cell in the each cell block, which has each smallest voltage between the both electrodes, from among plural unit cells structuring the cell blocks. The low-voltage CPU controls ON/OFF of a block-discharging switch to connect the both electrodes of each cell block and each block-discharging resistor for discharging the each cell block until the each voltage between the both electrodes of the selected smallest unit cell reaches the target voltage. Successively, the low-voltage CPU controls ON/OFF of a selecting switches and a cell-discharging switch to connect the both electrodes of each unit cell and each cell-discharging resistor to discharge the each unit cell until the each voltage between the both electrodes of the unit cells reaches the target voltage.

Abstract: The state-of-charge adjusting apparatus which enables to shorten a time to reach a capacity equalization is provided. A CPU extracts a block consisting of a plurality of unit cells connected continuously to each other, the plurality of the unit cells each having a voltage higher than a target voltage, and connects both ends of each block to a discharge resistance to make each block discharge. Thereafter, the CPU extracts a unit cell having a voltage higher than the target voltage and connects both ends of the extracted unit cell to the discharge resistance to make the extracted unit cell discharge until the voltage of the extracted unit cell reaches the target voltage.

Abstract: Providing a charge condition adjusting apparatus, which can shorten a time for equalization of each charge in unit cells, a low-voltage CPU selects each smallest unit cell in the each cell block, which has each smallest voltage between the both electrodes, from among plural unit cells structuring the cell blocks. The low-voltage CPU controls ON/OFF of a block-discharging switch to connect the both electrodes of each cell block and each block-discharging resistor for discharging the each cell block until the each voltage between the both electrodes of the selected smallest unit cell reaches the target voltage. Successively, the low-voltage CPU controls ON/OFF of a selecting switches and a cell-discharging switch to connect the both electrodes of each unit cell and each cell-discharging resistor to discharge the each unit cell until the each voltage between the both electrodes of the unit cells reaches the target voltage.

Abstract: A method and apparatus for judging deterioration of a battery are provided, thereby a correct judgement for the deterioration of the battery can be timely carried out so as to replace the battery with another if it is necessary.

Abstract: A method and an apparatus for regulating state of charge in a battery assembly in which respective voltages across unit cells can be equalized in a short time. Among a plurality of unit cells B1 to B4 . . . Bn, the unit cell having the largest voltage across the cell is referred to as the largest unit cell, and the unit cell having the smallest voltage across the cell is referred to as the smallest unit cell. Electric charge is transferred from the largest unit cell to a capacitor CB so that the voltage across the capacitor CB may be made higher than the voltage across the largest unit cell. Thereafter, the electric charge is transferred from the capacitor CB to the smallest unit cell thereby to equalize the voltages across the unit cells.

Abstract: A method and an apparatus for regulating state of charge in a battery assembly in which respective voltages across unit cells can be equalized in a short time. Among a plurality of unit cells B1 to B4 . . . Bn, the unit cell having the largest voltage across the cell is referred to as the largest unit cell, and the unit cell having the smallest voltage across the cell is referred to as the smallest unit cell. Electric charge is transferred from the largest unit cell to a capacitor CB so that the voltage across the capacitor CB may be made higher than the voltage across the largest unit cell. Thereafter, the electric charge is transferred from the capacitor CB to the smallest unit cell thereby to equalize the voltages across the unit cells.

Abstract: A method and apparatus are provided, by which a state of charge of a battery is accurately computed without being influenced by the polarization effect. An estimated voltage of the battery 13 in a constant load discharge with a predetermined large current value is estimated from a voltage-current characteristic when the discharge current of the constant load discharging process by the battery 13 that is in an equilibrium state is decreasing from the predetermined large current value corresponding to a maximum supplying electric power to the load. A difference between the estimated voltage and an open circuit voltage, which estimates the estimated voltage and is a terminal voltage of the battery 13 that is in an equilibrium state before the start of the constant load discharge by using the predetermined large current value, is calculated.