| 摘要 |
PROBLEM TO BE SOLVED: To appropriately implement power supply to an electric load which is connected to the side of a secondary storage battery while interposing a connection switch, in a power supply system comprising a first storage battery, the second storage battery and the connection switch conducting and cutting off both the storage batteries.SOLUTION: An in-vehicle power supply system comprises: a rotor 10 connected to an output shaft of an internal combustion engine of a vehicle and including a power generation function for generating power, a start function for starting the internal combustion engine and an output assist function for assisting output of the internal combustion engine; a lead storage battery 20 and a lithium ion storage battery 30 connected in parallel to the rotor 10, respectively; and a MOS switch 50 provided in a feeder 15 electrically connecting both the storage batteries for switching conduction and cutoff between the lead storage battery 20 and the rotor 10, and the lithium ion storage battery 30. Further, an ECU 80 cuts off the lead storage battery 20 and the rotor 10 from the lithium ion storage battery 30 by controlling the MOS switch 50 into a cutoff state when the rotor 10 performs start and output assist. |
