Honda Motor Co., Ltd.
Power supply system for vehicle

Abstract:

Provided is a power supply system for a vehicle, which can reduce a voltage of a main circuit to a specified voltage or less within a specified time after a vehicle collision. The power supply system for the vehicle includes: a high voltage battery, a driving motor connected to a driving wheel, a high voltage circuit transferring electric power between the high voltage battery and the driving motor, a secondary side voltage sensor acquiring a secondary side voltage which is a voltage in the high voltage circuit, and a system ECU executing discharge control for operating the high voltage circuit and reducing the secondary side voltage when a discharge start condition is established. After the discharge start condition is established, the system ECU starts a discharge control process after executing a standby control process for standing by for the start of the discharge control process for a predetermined time.