Patent ID: 11891001
Assignee: HONDA MOTOR CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A vehicle power supply system being mounted on a vehicle, the vehicle power supply system comprising:
a main power supply system including a main low-voltage power supply and a normal load; and
a backup power supply system including a backup low-voltage power supply and an emergency important load and connected to the main power supply system, wherein:
the backup power supply system is configured to supply electric power of the backup low-voltage power supply to the main power supply system;
the backup power supply system includes: a switching device configured to switch connection and cut-off with the main power supply system; and a backup power supply control device that controls the switching device;
the backup power supply control device is configured to:
execute a backup low-voltage power supply state estimation processing of estimating whether the backup low-voltage power supply is in a state allowing supplying electric power for operating the emergency important load when the vehicle power supply system transitions from an OFF state to an ON state;
output a signal indicating whether the backup low-voltage power supply is in a state allowing supplying electric power for operating the emergency important load;
output a signal indicating that the backup low-voltage power supply is in a state allowing supplying electric power for operating the emergency important load, without executing the backup low-voltage power supply state estimation processing, in a case in which a state of the vehicle satisfies a predetermined condition; and
execute the backup low-voltage power supply state estimation processing, and output a signal indicating that the backup low-voltage power supply is in a state allowing supplying electric power for operating the emergency important load based on an estimation result of the backup low-voltage power supply state estimation processing, in a case in which the state of the vehicle does not satisfy the predetermined condition.