VEHICLE POWER SUPPLY DEVICE

A vehicle power supply device includes: equipment disposed on an electrical path leading to a DC inlet of an electrified vehicle; and a DC connector disposed on the electrical path. The DC connector includes a first connector attached to a housing of the equipment. The first connector includes a terminal disposed inside the housing and a bus bar fastening portion provided at a tip of the terminal. The equipment includes a bus bar disposed inside the housing and including one end connected to a component of the equipment. The bus bar includes a connector fastening portion fastened to the bus bar fastening portion via a fastener, and a metal Z-shaped spring that expands and contracts in a direction parallel to a stretching direction of the bus bar at the end on the other end side.