Patent ID: 11945384
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  F | IPC B  F  H

Claim 13:
14. A power supply backup method to be used for a backup power supply system, the method comprising:
causing a main power supply to supply electric power to a load while failure of the main power supply does not occur; and
causing the backup power supply system to supply electric power to the load while failure of the main power supply occurs, wherein:
the backup power supply system includes a first auxiliary power supply and a second auxiliary power supply which are capable of supplying electric power to the load, and
a second duration until the second auxiliary power supply becomes capable of supplying electric power to the load is shorter than a first duration until the first auxiliary power supply becomes capable of supplying electric power to the load,
the first duration is a duration until the first auxiliary power supply becomes capable of supplying electric power to the load since the first auxiliary power supply starts to be charged, and
the second duration is a duration until the second auxiliary power supply becomes capable of supplying electric power to the load since the second auxiliary power supply starts to be charged.