WINDING PIN, WINDING APPARATUS, BATTERY MANUFACTURING DEVICE, AND WINDING METHOD

A winding apparatus includes a winding pin, a pair of first clamp pins configured to move away from each other after the winding pin is withdrawn from an electrode assembly to stretch the electrode assembly, and second clamp pin(s) configured to support an upper half portion of the electrode assembly in a process of stretching the electrode assembly. The winding pin includes a winding pin body, with an outer peripheral surface thereof being provided with a pair of first grooves spaced apart along a circumferential direction of the winding pin body and configured to accommodate the first clamp pins. The outer peripheral surface of the winding pin body is further provided with second groove(s) spaced apart from the first grooves along the circumferential direction of the winding pin body and configured to accommodate the second clamp pin(s).