Winding and unwinding mechanism, rolling device, pole piece processing equipment and battery production system

The utility model relates to a winding and unwinding mechanism, a rolling device, pole piece processing equipment and a battery production system, the winding and unwinding mechanism is applied to the rolling device for preparing a dry-method pole piece, the rolling device comprises a calendering roller and a composite roller which are arranged at an interval, and the winding and unwinding mechanism comprises a driving part, a winding part and a winding part; the take-up and pay-off roller is rotatably arranged around the axis of the take-up and pay-off roller, is in driving connection with the driving part and is used for winding the diaphragm; wherein the driving piece has a first state for driving the winding and unwinding roller to wind the membrane and a second state for driving the winding and unwinding roller to unwind the membrane; and the winding and unwinding roller is used for winding the membrane from the calendering roller under the driving of the driving piece or unwinding the membrane to the composite roller. The driving part can be switched between the first state and the second state, so that integration of film winding and unwinding can be achieved, the overall structure is simplified, rapid switching of winding and unwinding can be achieved through switching of the driving part between the first state and the second state, and operation flexibility is improved.