As the core equipment in the middle stage of lithium battery cell manufacturing, the winding machine can wind the diaphragm and positive and negative electrode pieces into a single lithium ion battery cell, and realize the efficient production of the cell through high rotation speed. Tension control precision is a key factor affecting the quality of battery products. In the process of high speed winding, the difference between the winding speed and the winding speed will cause the tension of the pole piece to change, leading to the sudden break of the tape. Therefore, lithium battery manufacturers need to adjust the speed of winding and unwinding by observing the moment when the core breaks the tape and the state before breaking the tape, so as to improve the production of broken tape and ensure product quality and production efficiency.