The latest original variable angle speed rotation technology makes the linear speed of the diaphragm and pole piece feed relatively constant, that is, to achieve the purpose of constant tension during the winding process, and to ensure that the battery core is wound neatly and uniformly. The two-roll diaphragm is unwinding actively, and the diaphragm tension signal is detected in real time by an encoder connected to the tension swing arm shaft. After being processed by the PLC, the diaphragm unwinding stepper motor actively follows the tension change and variable speed unwinding to achieve constant diaphragm tension purpose. At the same time supplemented by the company's latest cylinder tension control technology, the tension can be automatically and smoothly adjusted during the winding process