Patent ID: 8035247

Claim:
A power supply device to be mounted on a vehicle, comprising: a power storage device configured to be chargeable and dischargeable; a power line; a connection unit having a connecting state electrically connecting said power storage device to said power line and a disconnecting state electrically isolating said power storage device from said power line; a power supply unit obtaining a supplied power, from an outside of the vehicle, according to a power command, and providing said supplied power to said power line; an accessory load connected to said power line; a voltage detecting unit detecting a voltage on said power line; and a control device controlling at least said connection unit, said power supply unit and said accessory load, wherein when said accessory load is driven by said supplied power, said control device sets said connection unit in said disconnecting state, and produces said power command based on a predetermined target value of the voltage on said power line and a result of detecting by said voltage detecting unit such that said detecting result of said voltage detecting unit attains said target value.