Abstract: A battery control device that: computes a potential power output capable of being output by a second battery capable of supplying power to onboard equipment of a vehicle in place of a first battery for supplying power to the onboard equipment, measures a temperature of the second battery, and determines whether or not the second battery is a suitable substitute for the first battery depending on whether or not the measured temperature is a preset set temperature or above.

Abstract: A vehicle battery controller includes a sensor configured to acquire information on a subordinate battery configured to back up a main battery during autonomous driving, a DDC provided between the main battery and the subordinate battery, a switching circuit configured to switch a connection state of the subordinate battery between a connection state for manual driving and a connection state for the autonomous driving, and an electronic control unit configured to control charging and discharging of the subordinate battery by controlling the DDC and the switching circuit based on the information acquired by the sensor. The electronic control unit permits the autonomous driving when determination is made, through first battery control, that the subordinate battery can output backup power. The electronic control unit determines whether the subordinate battery can output the backup power by executing second battery control having higher accuracy than that of the first battery control.

Abstract: A vehicle battery controller includes a sensor configured to acquire information on a subordinate battery configured to back up a main battery during autonomous driving, a DDC provided between the main battery and the subordinate battery, a switching circuit configured to switch a connection state of the subordinate battery between a connection state for manual driving and a connection state for the autonomous driving, and an electronic control unit configured to control charging and discharging of the subordinate battery by controlling the DDC and the switching circuit based on the information acquired by the sensor. The electronic control unit permits the autonomous driving when determination is made, through first battery control, that the subordinate battery can output backup power. The electronic control unit determines whether the subordinate battery can output the backup power by executing second battery control having higher accuracy than that of the first battery control.

Abstract: A bus bar module includes bus bars and block circuits. A voltage detection circuit included in each block circuit detects voltage values of electric storage elements via lines connected to the respective bus bars. The number of the electric storage elements assigned to a first block circuit is an even number equal to or larger than a minimum number and smaller than a maximum number. The number of the electric storage elements assigned to a second block circuit is equal to or larger than the minimum number and smaller than the maximum number. The number of the electric storage elements assigned to each third block circuit is the maximum number.

Abstract: A bus bar module includes bus bars and block circuits. A voltage detection circuit included in each block circuit detects voltage values of electric storage elements via lines connected to the respective bus bars. The number of the electric storage elements assigned to a first block circuit is an even number equal to or larger than a minimum number and smaller than a maximum number. The number of the electric storage elements assigned to a second block circuit is equal to or larger than the minimum number and smaller than the maximum number. The number of the electric storage elements assigned to each third block circuit is the maximum number.

Abstract: A battery monitoring device includes a first unit arranged outside a plurality of stacks each of which includes cells; a plurality of second units arranged in each of the stacks to output voltage data of the cells; a signal line that connects the second units and the first unit in a daisy chain mode; and a detection unit that detects a stack voltage wherein the first unit determines that a disconnection is generated on the signal line when a response is not received from the plurality of second units via the signal line after sending data is sent to the plurality of second units via the signal line and, determines on which path of the signal line, a forward path or a backward path, the disconnection is generated based on a difference between the stack voltage and a total of all detected output voltages sent from the second units.

Abstract: A bus bar module may have a bus bar including a battery side terminal portion and a connection portion. The battery side terminal portion may electrically connect electrode terminals of two adjacent battery cells of a battery assembly. The connection portion may electrically connect the battery side terminal portion and a terminal of a circuit side member associated with the battery assembly. The bus bar may be configured as a single member.

Abstract: A bus bar module may include a circuit side member associated with a battery assembly having a plurality of battery cells arranged next to each other in an arrangement direction, and a bus bar electrically connecting the circuit side member with the battery cells of the battery assembly. A gas discharge duct may be integrated with the circuit side member and configured to allow flow therethrough of gas discharged from safety valves associated with the battery cells.

Abstract: A battery monitor apparatus includes: a first control unit disposed outside a plurality of battery stacks each including battery cells; a plurality of second control units disposed respectively in the plurality of battery stacks, the second control units determining an output voltage of the battery cells and outputting voltage data representing the determined voltage; and a signal line connecting the plurality of second control units and the first control unit in a daisy chain system, wherein the second control units receive a data signal transmitted from the first control unit and transmit a response signal responding to the data signal, via the signal line, and the first control unit determines that the signal line is disconnected, when the response signal is not received via the signal line within a prescribed time period after transmitting the data signal to the plurality of second control units via the signal line.