Charging protection device for electric motor sweeper

The utility model provides an electric sweeper charging protection device which comprises a charging socket, the charging socket is connected with a vehicle-mounted charger, and a zero line and a live line which are connected between the charging socket and the vehicle-mounted charger are connected with the two ends of an intermediate relay coil respectively. Two ends of a normally open contact of the intermediate relay are respectively connected with the control power supply and a coil of the high-voltage relay, the other end of the coil of the high-voltage relay is grounded, and two ends of a normally closed contact of the intermediate relay are respectively connected with the switching power supply and the key switch; the two ends of a normally open contact of the high-voltage relay are connected with the positive electrode of the vehicle-mounted charger and the positive electrode of the lead-acid battery pack respectively, and the negative electrode of the vehicle-mounted charger is connected with the neg