Patent ID: 11885852
Assignee: GS YUASA INTERNATIONAL LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  B  H  Y | IPC G  H

Claim 0:
1. A battery management device that manages an energy storage device to which a shunt resistor is connected, the battery management device comprising:
a current measurement unit that measures a current flowing through the shunt resistor using a pair of signal wires connected to both ends of the shunt resistor;
a connecting wire that connects the signal wire to a reference potential source via an opening/closing switch; and
a determination unit that determines presence or absence of a failure in which connection between the pair of signal wires via the shunt resistor becomes defective based on a change in current measured by the current measurement unit when the opening/closing switch is opened and closed,
wherein the reference potential source is a ground,
wherein the current measurement unit measures a voltage between the pair of signal wires and measures a current based on the voltage,
wherein the pair of connecting wires are connected to the pair of signal wires via a resistor having a resistance higher than a resistance of the shunt resistor, and
wherein the determination unit determines that the failure has occurred when a current measured by the current measurement unit approaches 0 in a state where the opening/closing switch is closed as compared with a current measured by the current measurement unit in a state where the opening/closing switch is open.