In-vehicle power supply device

Abstract

Provided is an in-vehicle power supply device that is less susceptible to the occurrence of sneak current between a main battery and a sub-battery that supply power externally. The in-vehicle power supply device includes a main battery for in-vehicle use, a sub-battery for in-vehicle use, a switch, a main power supply path, a sub-power supply path, a relay, and wiring. The switch has a first end connected to the main battery and the main power supply path, and a second end connected to the sub-battery. The relay has a first contact connected to a sub-power supply path, and a second contact connected to the second end. The first contact and the second contact form a pair. The wiring is a connection path that connects the first end and the first contact, and supplies power from the main battery to the sub-power supply path.

Dependencies are inferred from the claim text.