Bidirectional power supply system applicable to plug-in hybrid electric vehicle

The present invention provides a bidirectional power supply system applicable to a plug-in hybrid electric vehicle. On the basis of configuring the direct current fast charging technology, one distribution relay is added to the plug-in hybrid electric vehicle provided with a power assembly having the range extender function, and the corresponding software control function is fulfilled, and thus the vehicle can outwards provide direct current according to needs; on the basis of configuring the alternating current slow charging technology, a vehicle-mounted battery charger is provided for bidirectional conversion (AC/DC&DC/AC, that is, alternating current is converted into direct current and direct current is converted into alternating current), and the corresponding software control function is fulfilled, and thus the vehicle can outwards provide alternating current according to needs. The bidirectional power supply system applicable to the plug-in hybrid electric vehicle has the functions of providing charging rescue when electric energy of the electric vehicle is used up and the electric vehicle breaks down in the field, and providing power supply for household appliances in the field.