ON-BOARD CHARGER FOR ELECTRIC VEHICLE, RELAY CONTROL METHOD THEREOF, AND BIDIRECTIONAL CHARGING SYSTEM FOR ELECTRIC VEHICLE COMPRISING SAME

An on-board charger for an electric vehicle includes a vehicle port configured to be connected to an external charger comprising a first relay located on an internal first power supply path, a power converter, a second relay located on a second power supply path between the vehicle port and the power converter, and a controller configured to turn off the first relay and the second relay in response to triggering a vehicle-to-grid (VG) protection operation based on power-related parameters.