Soft-pack batteries usually use a lamination process. During the production and preparation process, the generated burrs and dust are likely to cause short circuit of the battery and cause great battery safety hazards. Therefore, it is particularly important to control the pole piece burr dust during the production and preparation process of the soft pack battery.

　　The soft pack battery cell usually adopts the lamination process, rather than the winding method usually adopted by the square battery cell. In the process of die-cutting and lamination of soft-pack batteries, the burrs and dust produced can easily cause short circuit of the battery and cause great potential battery safety hazards. Therefore, it is particularly important to control the burr dust of the pole pieces during the production and preparation of soft-pack batteries.

　　Pole piece burr refers to the stretching and bending of the section base material produced by the punching of the pole piece. In the die-cutting and lamination processes, controlling the size of the burrs during punching, reducing the dust generated during punching, and avoiding the generation of burrs during the transfer of pole pieces have become the most important problems facing these two processes. To solve these problems, we must first understand the causes of burrs and dust.

　　There are three main reasons for the generation of burr dust on the pole piece: 1) the method of punching; 2) the structure of the punching die; 3) the material and processing accuracy of the punching die.

　　According to the causes of burrs and dust, the solution can be improved from the following aspects in the future:

　　1. Optimize the existing mold structure;

　　2. Improve the precision of mold manufacturing and assembly;

　　3. Use laser die cutting machine;

　　4. The die-cutting and lamination integrated machine is adopted. The die-cutting and lamination integrated machine can directly enter the lamination platform after the pole piece is punched, avoiding collision and friction between the pole piece and the magazine, and completely solving the potential risk of poor pole piece.