ONBOARD POWER-SOURCE DEVICE

摘要

Provided is an onboard power-source device wherein current does not easily stray between a main battery and an auxiliary battery that supply power to the outside. The onboard power-source device comprises an onboard main battery and an onboard auxiliary battery. The onboard power-source device also comprises a plurality of diode pairs and a switch that is connected in parallel to all of the diode pairs. The auxiliary battery is connected to the main battery via the switch. The two diodes of the diode pairs have opposite forward directions and are connected in series.