One-way plug type charging system and temperature protection method during charging

The invention discloses a one-way plug type charging system. The one-way plug type charging system comprises an automobile charging port, a charging cable and a charging pile. One end of the charging cable is fixedly connected with the charging pile. The end, far away from the charging pile, of the charging cable is fixedly connected with a charging plug connected with the automobile charging port selectively. A temperature sensor is fixedly connected inside the charging plug. A current control device is fixedly connected in the charging pile. Through the one-way plug type charging system, an electrombile can be charged fast and conveniently, and meanwhile a temperature protection function is achieved, so that charging is safe and reliable. Through a temperature protection method during charging, the charging pile can have temperature safe protection performance during charging of the electrombile, and the phenomenon that during plugging connection, the charging plug is infirm or damaged and consequently charging overheating and an accident occur is prevented.