Power supply system, power supply system failure diagnosis method, and system controller

摘要

Reduce diagnosis time. The power supply system (10, 20, 30, 40) includes a battery device (13, 23, 33, 43), a switch (14, 24, 34, 44) connected in series to each battery device, and A voltmeter (15, 25, 35, 45) for measuring the voltage of a circuit composed of a battery device and a switch, and controls a power supply system in which power supply devices (10, 20, 30, 40) are connected in parallel The device that turns on at least one power supply device performs a failure diagnosis based on the voltage value of the power supply device to which the switch in the off state belongs.