VEHICULAR POWER SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a vehicular power supply system capable of preventing battery exhaustion while securing operation of a system which is never to be shut down.

SOLUTION: The vehicular power supply system supplies power to a plurality of loads in a vehicle from a battery mounted on the vehicle, and it is provided with a battery management means 4 constantly supplied with power from the battery 1 and connected with an input part 90 and an output part 100 relevant to the system which is never to be shut down, a vehicular stoppage detecting means 27 detecting stoppage of the vehicle, and cutoff means 6 and 7 cutting off power supply to all loads 30 and 60 of the plurality of loads except the battery management means 4. The battery management means 4 drives the cutoff means 6 and 7 when vehicular stoppage is detected by the vehicular stoppage detecting means 27.

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