Patent ID: 8896266

Claim:
An electric charging system in which an electric vehicle is provided with a power receiving connector that is connected to an electric storage device via a relay unit, and the power receiving connector is connected to a power supply connector of an electric charger, whereby charging power is supplied to the electric storage device from the electric charger, the electric charging system comprising: a information storage unit that stores information on a weld failure that occurs at the relay unit; a connection detection unit that detects a connection state between the power receiving connector and the power supply connector; a first warning unit that issues a sound-based warning when the power receiving connector is not connected to the power supply connector under a state where a weld failure occurs at the relay unit and does not issue a sound-based warning when the power receiving connector is connected to the power supply connector under a state where a weld failure occurs at the relay unit; and a second warning unit that issues a light-based warning when a weld failure occurs at the relay unit, regardless of the connection sate of the power receiving connector and the power supply connector, wherein the relay unit includes a first relay that is disposed at one of a pair of current carrying lines connecting the electric storage device and the power receiving connector and a second relay that is disposed at the other one of the pair of the current carrying lines; a sound-based warning issued by the first warning unit when a weld failure occurs at both of the first relay and the second relay is different from a sound-based warning issued by the first warning unit when a weld failure occurs at either one of the first relay and the second relay; and a light-based warning issued by the second warning unit when a weld failure occurs at both of the first relay and the second relay is different from a light-based warning issued by the second warning unit when a weld failure occurs at either one of the first relay and the second relay.