Bidirectional charging vehicle-mounted charging system with poor contact prevention function

The invention discloses a bidirectional vehicle-mounted charging system with a poor contact prevention function and relates to the technical field of vehicle charging. The system comprises a plug connected with a charging pile and a vehicle-mounted socket hinged with a dust cover, one side of the vehicle-mounted socket is connected with a connecting device, and the vehicle-mounted socket and the connecting device are mounted in a vehicle. A charging device and a discharging device are installed in the connecting device, the vehicle-mounted socket is in contact with the plug for charging, the vehicle-mounted socket is not in contact with the plug during discharging, and a conversion device is arranged in the connecting device and used for conversion between charging and discharging. The plug is provided with the electromagnetic limiting assembly, it can be guaranteed that the plug and the vehicle-mounted socket always keep tight contact in the power-on period, the plug is further provided with the threaded hol