What are the specific lithium battery processing procedures and processes?

Processing process and control original data → original data inspection → original data pre-solving → ingredients → ingredient inspection → vacuum induction melting → rapid cooling ingot casting → semi-finished product inspection → thermal solution → coarse crushing → powder making → screening → post-solving → vacuum Or nitrogen-filled packaging→finished product inspection→product A: exercise: 1) Process requirements information The supplier supplies the material list, and the QC department also conducts a test. The components and impurities content that meet the process requirements are resolved and stored for use. 2) The key to pre-solving the quality of materials is to eliminate the pollutants and oxide layers on the surface of the original materials to ensure the cleanliness of the original materials. 3) The ingredients should be based on different conditions to make up the burning loss of certain volatile elements such as rare earths and manganese according to the specified goals. 4) Vacuum induction smelting should be filled with argon gas under a vacuum of 0.1Pa, and each component metal is melted into an alloy at a high temperature of 1300°C, and then rapidly cooled to cast an ingot to obtain an alloy with refined grains and an even structure. B: Semi-finished products: The inspection of semi-finished products has three aspects: 1) Appearance: The appearance of the alloy should have metallic luster, no obvious oxidation and discoloration, and the alloy structure should be average and fine, free of looseness and impurities; 2) Chemical composition: the chemical composition of the alloy should be in accordance with the planned composition Consistent; 3) Electrochemical capacity: Should be satisfied with the company's specification requirements, otherwise it can not be transferred down. C: Thermal solution: use a vacuum thermal solution furnace, and then fill it with argon for maintenance after vacuuming. The thermal solution process is critical to homogenize and stabilize the product (eliminate internal stress), ensure the flat platform pressure of the alloy, outstanding uniformity and outstanding cycle life characteristics. Focus on ensuring temperature and vacuum, and do oxygen content determination. D: The whole process of alloy coarse crushing, powder making and packaging are all closed under argon maintenance to ensure that the oxygen content of the alloy is very low. The finished product inspection has four aspects: 1) Appearance: no discoloration, oxidation, and agglomeration on the outside; 2) Physical properties, particle size distribution, and loose packing ratio conform to company specifications; 3) Chemical characteristics: alloy powder composition and impurity content, alloy The PCT curve conforms to the company's specifications; 4) Electrochemical performance: the electrochemical capacity, charge and discharge characteristics, cycle life, high current pulse discharge characteristics and temperature characteristics of the alloy. The inner packaging of the product is a nylon composite plastic bag vacuum double-layer packaging, and the whole box is packed in a plastic bag filled with nitrogen. The outer box: a carton. 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 it. Previous post: Is the equalization of lithium battery packs really effective in improving battery consistency?