Analyze the critical process flow of lithium battery pack processing

In the processing technology of lithium battery packs, pole piece production is the foundation and battery cell production is the core, and battery packaging is related to the quality of the finished lithium battery. The detailed process of the lithium battery pack processing process includes positive electrode slurry drawing, negative electrode drawing slurry, positive electrode sheet, negative electrode sheet, steel shell assembly, liquid injection and testing, and packaging. It can be seen that each processing link in the lithium battery pack processing process is closely related to product quality and safety. Every link in the lithium battery processing process must be strictly and carefully managed, so as to improve the lithium battery pack products. Safety performance. The first step-preparation of electrode slurry is to mix electrode active materials, binders, solvents, etc., and stir and disperse sufficiently to form a slurry. The second step-coating The slurry prepared in the first step is evenly coated on the current collector (aluminum foil or copper foil, etc.) with a specified thickness, and the solvent is dried. The third step-pole piece punching cut the pole piece produced in the previous step into the specified size and shape. Step 4-Assemble the positive and negative plates and the separator together by lamination, and form the pole core after the glue is applied. Step 5-Assemble the soft pack battery. Put the pole core processed in the previous step into the aluminum-plastic film that has been flushed, and complete the top seal, side seal, etc. (and leave a mouth for injection) to form a non-injected soft Pack batteries. Step 6-Liquid injection: Inject the specified amount of electrolyte into the soft-packed cell. Of course, the battery cell needs to be baked, and the liquid injection operation is carried out in a low humidity environment, too much moisture content is not good. The seventh step-the battery is sealed in a vacuum environment to extract the gas inside the battery and complete the sealing. With the rapid development of electric vehicles and automobiles, the power supply on vehicles has also developed rapidly. However, there are many problems in the processing of lithium battery packs, which has caused the quality of battery products in the market to be very uneven. The later cycle life of the capacity cannot reach the designed service life, which has a lot to do with the magical processing technology of the lithium battery pack in the processing. The structure of the battery is composed of a shell, an upper cover, a pole plate, a separator, a bus bar, a pole, a bridge protection plate, and a terminal. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Briefly describe lithium battery recycling technology