Abstract: A power control apparatus according to an embodiment includes acquisition circuitry and determination circuitry. The acquisition circuitry is configured to acquire a voltage of a secondary battery during charging. The determination circuitry is configured to determine a maximum current to be used during charging of the secondary battery using a difference between an upper limit voltage and the acquired voltage.

Abstract: According to one embodiment, a vehicle-use storage battery system includes a storage battery, a main circuit, a circuit breaker, a storage battery management unit, a first determiner, and a second determiner. The main circuit is electrically connected to the storage battery. The circuit breaker is disposed between the storage battery and the main circuit to make or break the electrical connection therebetween. The storage battery management unit manages an operating state of the storage battery. The first determiner determines whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker. The second determiner determines, on the basis of at least one of operating states of the storage battery management unit, the first determiner, and the circuit breaker, whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker.

Abstract: A power control apparatus according to an embodiment includes an acquisition unit and a determination unit. The acquisition unit acquires information relating to a voltage and an electric current of a chargeable/dischargeable secondary battery during charging/discharging. The determination unit determines a maximum current of the secondary battery during charging on the basis of the information acquired by the acquisition unit so that the voltage of the secondary battery does not exceed a predetermined voltage.

Abstract: According to one embodiment, a vehicular storage battery device includes a housing, battery boxes, and a common cooling passage. The battery boxes are disposed in the housing. Each of the battery boxes houses an electric cell as a vehicle power source and includes a heat transporting part transporting heat generated in the battery box to outside of the battery box. The common cooling passage is disposed in the housing. The common cooling passage is provided with an inlet for taking in a fluid and an outlet for discharging the fluid having passed through the passage. The inlet and the outlet are open in a direction different from a traveling direction of the vehicle. The heat transporting part of each of the battery boxes is exposed to inside of the passage.

Abstract: According to an embodiment, a battery module includes, for example, a plurality of battery cells, a first chassis, and a connection member. The battery cells are aligned in a first direction. The first chassis includes a plurality of first compartments in which the battery cells are housed one by one, and at least one second compartment that is partitioned in the first direction. The connection member includes a body that is housed in the second compartment; a pair of connection terminals that is mounted on a first face of the body and is electrically connectable to the electrodes of the battery cells via a conductive member, the first face facing in a second direction intersecting with the first direction; and a conductor that extends across the pair of connection terminals.

Abstract: A storage battery device includes a battery unit, a first circuit breaker, a second circuit breaker, and a control unit. The first circuit breaker switches between connecting and disconnecting a first-electrode side of the battery unit and an external device. The second circuit breaker switches between connecting and disconnecting a second-electrode side of the battery unit and the external device. The control unit supplies power to the first circuit breaker and the second circuit breaker in sequence with the power supplied to the second circuit breaker offset relative to the power supplied to the first circuit breaker by a time period equal to or longer than a time difference required for a sum of currents flowing through the first circuit breaker and the second circuit breaker to reach an upper bound current that is set as an upper bound of a current.

Abstract: A storage battery management device includes a connector, storage, a drive voltage controller, a determiner, and a current sensor controller. The connector is connectable to a current sensor. The storage stores current sensor information including an output range of normal output values and each current-sensor type indicating a type of a current sensor connectable to the connector in association with each other. The drive voltage controller causes a current to flow through a current sensor while varying a voltage to be applied to the current sensor. The determiner determines, based on whether an output value that is received via the connector from the current sensor falls in the output range corresponding to the current-sensor type, the current-sensor type of the current sensor connected to the connector. The current sensor controller controls the current sensor in accordance with the determined current-sensor type.

Abstract: A battery pack includes a casing, a plurality of battery cells, and a first connector, for example. The casing includes a first outer wall and a protrusion that is provided on the first outer wall and protrudes outward from the first outer wall. The battery cells include an electrode terminal and are housed in the casing. The first connector is provided on the protrusion and is electrically connected to the electrode terminal.

Abstract: A storage battery device includes: first and second battery systems including a plurality of first and second battery modules and a plurality of first and second monitoring units detecting module information that is information related to the battery modules, and respectively having first and second identification information; and a battery management unit configured to receive a lower-level communication frame containing the monitoring identification information and the module information from the monitoring units, and transmit, to an upper-level device of the battery management unit, an upper-level communication frame that contains individual identification information assigned to each of the monitoring units based on system identification information assigned to the battery systems, and the monitoring identification information, that also contains the module information detected by the first or the second monitoring unit corresponding to the individual identification information, and that has a larger data

Abstract: A battery pack includes a first casing, a plurality of battery cells, and a second screw, for example. The first casing is supported by a support member and includes an insulating first outer wall. The battery cells are housed in the first casing. The first outer wall is provided with a second screw that is connectable to a first screw. The first casing is supported by the support member with the first screw fitted into the second screw, placing the support member in-between the first screw and the second screw.

Abstract: A battery module includes: a battery cell unit including a plurality of battery cells connected together in series or series-parallel; a cell monitoring unit configured to monitor temperatures and voltages of the battery cells; and a plurality of overtemperature/overvoltage detecting units of n systems (n: an integer greater than or equal to 2). The overtemperature/overvoltage detecting units of the n systems are configured to independently detect an overtemperature or an overvoltage of the battery cells as an abnormal state, and to mutually notify one another of results of the detection. Each of the overtemperature/overvoltage detecting units is configured to, upon being notified that the abnormal state is detected from another overtemperature/overvoltage detecting unit of another system in the battery module, operate on the assumption that the overtemperature/overvoltage detecting unit detects the abnormal state.

Abstract: According to one embodiment, a storage battery device includes a battery group, a charge-and-discharge control FET unit, and a drive controller. The battery group includes a plurality of battery cells connected in series. The charge-and-discharge control FET unit is connected to a low potential side of the battery group and includes at least a pair of N-channel MOSFETs source terminals of which are back-to-back connected. The drive controller outputs a drive control signal to a gate terminal of the respective N-channel MOSFETs included in the charge-and-discharge control FET unit. The drive control signal is generated based on a potential level of the source terminals.

Abstract: An apparatus according to an embodiment, includes an output terminal; a switch which switches an output state of the output terminal; a battery module which outputs temperature information of a battery cell embedded therein; a contactor which electrically connects a main circuit and the battery module; a BMU which compares a temperature of the battery cell based on the temperature information and a first threshold, opens the contactor and switches the output state, when the temperature of the battery cell is equal to or higher than the first threshold; and a SSU which compares a temperature of the battery cell based on the temperature information with a second threshold, opens the contactor when the temperature of the battery cell is equal to or higher than the second threshold, and switches the output state, wherein the first threshold is lower than the second threshold.

Abstract: According to one embodiment, a cell monitoring device that performs monitoring of a cell module under control of a battery management device (BMD), includes a communication controller and a control device. The communication controller is capable of being connected to BMD through a communication line. The control device performs an activation processing of the communication controller at a time of initialization, and controls the cell monitoring device. The control device performs a reboot processing of the communication controller in a period shorter than a period of detecting an error condition of the communication controller by BMD when a second voltage drops to be below an operation allowable voltage of the communication controller in a state in which a first voltage is above a certain operation allowable voltage. The first voltage represents a power supply voltage of the control device. The second voltage represents a power supply voltage of the communication controller.

Abstract: A storage battery management device manages storage battery systems in a power system, each storage battery systems having a storage battery device. The management device includes a SOC estimation table in which a relationship between an open circuit voltage of the storage battery device and the SOC is stored in advance; a measurement control unit that sets a predetermined SOC area where the open circuit voltage and the SOC can be considered as a monotonic function by discharging or charging a storage battery device of SOC measurement target between storage battery systems, and measures the open circuit voltage of the storage battery device of SOC measurement target by electrically disconnecting the storage battery device from a power supply/demand channel; and an estimation unit that estimates the SOC of the storage battery device by referring to the SOC estimation table based on the open circuit voltage measured in the SOC area.

Abstract: According to one embodiment, a wiring diagnostic apparatus of embodiments includes a counter, an acquirer, and an abnormality determiner. The counter counts the number of battery modules connected to a plurality of first communication lines to which a plurality of battery modules are connected to form a communication channel for each of the first communication lines. The acquirer acquires identification information for identifying a battery module connected to a corresponding second communication line among battery modules connected to a plurality of second communication lines each forming a communication channel with a first communication line via the second communication line. The abnormality determiner determines an abnormality in a wiring relationship of the first communication line or the second communication line on the basis of the number of battery modules counted by the counter and identification information acquired by the acquirer.

Abstract: According to one embodiment, a battery control apparatus according to an embodiment includes a counter, a serial information setter, and an information transmitter. The counter counts, for communication lines to which a plurality of battery modules are connected to form communication channels, the number of battery modules connected to each of the communication lines. The serial information setter sets a series of pieces of information about the battery modules connected to the plurality of communication lines as information for identifying the battery modules on the basis of the number of battery modules counted by the counter. The information transmitter transmits, to an external apparatus, management information in which status information of each of the battery modules is associated with each piece of the series of pieces of information set by the serial information setter.

Abstract: A storage battery management device is configured to manage storage battery systems each including a plurality of battery boards and a power adjustment devices corresponding to the battery boards. The storage battery management device is configured to compensate charging power and discharging power of a battery board used in a diagnosis for the battery board, inside the storage battery systems by transmitting and receiving the charging power or the discharging power between power adjustment devices of the storage battery systems, when performing the diagnosis while causing the storage battery systems to remain operated. Therefore, it is possible to diagnose a control device of a battery board without affecting an electric grid.

Abstract: A storage battery management device manages a plurality of battery units in a storage battery system including the battery units having a plurality of battery cells and a power adjustment device connected to the battery units via respective contactors and connected to a main circuit. The storage battery management device includes a minimum value determination unit and a controller. The minimum value determination unit, from the battery units in which a difference between a maximum cell voltage and a minimum cell voltage of the battery cells forming each of the battery units is equal to or less than a certain value, determines a minimum value of the minimum cell voltage. The controller controls a cell balance process of the battery unit managed by itself, by using the minimum value of the minimum cell voltage determined by the minimum value determination unit as a cell balance target voltage.

Abstract: According to one embodiment, a vehicle-use storage battery system includes a storage battery, a main circuit, a circuit breaker, a storage battery management unit, a first determiner, and a second determiner. The main circuit is electrically connected to the storage battery. The circuit breaker is disposed between the storage battery and the main circuit to make or break the electrical connection therebetween. The storage battery management unit manages an operating state of the storage battery. The first determiner determines whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker. The second determiner determines, on the basis of at least one of operating states of the storage battery management unit, the first determiner, and the circuit breaker, whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker.