Patent ID: 11936005
Assignee: AESC JAPAN LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  G  Y | IPC B  G  H

Claim 0:
1. A power supply device, comprising:
a plurality of battery packs connected in parallel to a load;
a plurality of battery controllers corresponding to the plurality of battery packs in a one-to-one correspondence; and
a relay configured to connect or disconnect each of the battery packs to or from the load,
wherein the plurality of battery controllers has a master-slave configuration including a master controller and at least one slave controller, and each of the master controller and the at least one slave controller is configured to execute a self-diagnosis and a mechanical operation diagnosis of a mechanical component including the relay before connecting the battery packs to the load,
wherein each of the master controller and the at least one slave controller is configured to perform communication between the master controller and the at least one slave controller by using a first communication scheme and a second communication scheme that has a communication period shorter than a communication period of the first communication scheme,
wherein during executing the self-diagnosis, the master controller and the at least one slave controller are configured to perform the communication by using the first communication scheme, and
wherein during executing the mechanical operation diagnosis, which is executed after the executing the self-diagnosis is completed, the master controller and the at least one slave controller are configured to perform the communication by using the second communication scheme.