Automatic replacement device for electric vehicle battery

The invention discloses an automatic replacement device for an electric vehicle battery, and belongs to mechanical devices capable of improving the working efficiency when electric vehicle batteries are replaced. The device is composed of a vehicle-mounted base, a push rod motor, a battery fixing frame, a guiding wheel, an electromagnet, a micro switch, a single-chip microcomputer, a stroke switchand a linear guide rail. The battery fixing frame is fixed to the vehicle-mounted base through the linear guide rail and used for limiting motion in the perpendicular direction; a battery box is fixed to the battery fixing frame through the electromagnet, and the push rod motor is fixed to the battery fixing frame through a slidable groove and used for pushing the battery box and the battery fixing frame to move horizontally; the guiding wheel is fixed to the vehicle-mounted base through a bolt and used for controlling the motion direction of the battery; the single-chip microcomputer, the micro switch and the stroke