Patent ID: 11862998
Assignee: HITACHI ASTEMO, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  G | IPC H

Claim 0:
1. A battery management device comprising
a cell controller that performs balancing for adjusting voltages of a plurality of secondary batteries; and
a control unit that controls the cell controller,
wherein the cell controller includes a main timer for measuring an elapsed time for stopping the cell controller, and a stop management unit that stops the cell controller when the main timer is abnormal,
wherein a first power supply that supplies power to the main timer and the stop management unit, and a second power supply that supplies power to the control unit, are different from each other,
wherein the stop management unit includes a sub-timer that is provided separately from the main timer and measures the elapsed time, and
wherein the cell controller stops when the elapsed time measured by the main timer reaches a balancing time set by the control unit, or when the elapsed time measured by the sub-timer reaches a predetermined stop time longer than the balancing time.