Charging protection structure of lithium battery

The utility model discloses a charging protection structure of a lithium battery, which comprises a shell, a mounting seat is fixed on the outer wall of one side of the shell through a bolt, a lithium battery body is fixed on the inner wall of the bottom of the shell through a bolt, a socket is arranged on one side of the lithium battery body, and a plug is inserted into the socket. Protruding blocks are integrally connected to the outer walls of the top and the bottom of the plug, a hydraulic cylinder is fixed to the outer wall of one side of the mounting base through bolts, and a fixing block is fixed to the output end of the hydraulic cylinder through bolts. When the temperature sensor senses that heat dissipated when the lithium battery body in the shell is charged reaches a set maximum value, a signal is transmitted to the controller, the controller starts the hydraulic cylinder to push the fixed block and the convex block to move, the convex block can drive the plug to be pulled out of the socket, and a