What are the critical processes for lithium battery pack processing?

Mixing material (positive and negative active material + conductive agent + binder + dispersant), coating, rolling, slitting, welding, winding (or gasket), sticking adhesive paper into the cell shell, welding, sealing, etc.; basically the whole The battery processing technology in the industry is similar. The important difference is that the equipment is different or the battery products are different. For example, the soft-packed lithium battery packs are generally laminated, cylindrically wound, squarely wound and laminated; resulting in the battery core not being wound during the winding process. The same; the most important and core technology is mixing and coating, as well as the final formation. The processing technology of lithium battery packs is more complicated. The processing technology mainly covers the stirring and coating stage of electrode production, the winding and liquid injection stage of battery cell synthesis, and the packaging test stage of chemical packaging. The value of the battery is about (35~40 %):(30~35)%:(30~35)%. According to Coating Online, the difference is mainly due to the difference in equipment suppliers, the difference in the ratio of imported/domestic products, etc. The process flow is basically the same, and the proportion of value is deviated but the overall proportion is in line with this ratio. The lithium battery equipment corresponding to the first process of lithium battery pack processing mainly includes vacuum mixer, coating machine, roller press, etc.; the middle process mainly includes die cutting machine, winding machine, stacker, liquid injection machine, etc.; the latter process includes Formation machine, sub-volume test equipment, process warehousing logistics automation, etc. In addition, the processing of battery packs requires Pack automation equipment. In the lithium battery manufacturing process, the middle process is critical to complete the formation of the battery. The critical process includes film making, pole piece winding, die cutting, cell winding forming and lamination forming, etc. The current domestic equipment manufacturers are relatively fiercely competitive. One category accounts for about 30% of the value of lithium battery pack processing lines. Lithium battery back-end process: the core part of the lithium battery pack’s back-end processing process is the four processes of volume-dividing, forming, testing, and packaging, which account for about 35% of the value of the processing line. Formation and capacity separation are the most important links in the subsequent process, and the formed battery is tested for activation. Due to the long charge and discharge detection cycle of the battery, the value of the equipment is the highest. The main purpose of the formation process is to charge and activate the cells after the liquid injection and packaging, and the volumetric process is to detect the battery capacity and other electrical performance parameters and perform classification after the battery is activated. Formation and volume separation are respectively completed by the forming machine and the volume dividing machine, which are usually completed by an automated volumetric forming system. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to test the power of lithium iron phosphate battery