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

Claim 7:
8. 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 main timer sets a start time for the cell controller according to a balancing time set by the control unit,
wherein the cell controller stops when the elapsed time reaches the start time,
wherein the elapsed time begins when the balancing commences and ends at the start time, and
wherein the stop management unit shortens the elapsed time when the elapsed time becomes abnormally long in the main timer.