Explanation of the processing process of lithium battery

Lithium battery processing technology flow explains the processing process and control: raw material inspection, raw material pre-solution, ingredient inspection, vacuum induction smelting, fast-cooling ingot semi-finished product, thermal solution, cracking powder production, screening, vacuum or nitrogen-filled packaging finished product inspection. 1. Exercise: 1. The key to material pre-solution is to remove contaminants and oxides on the surface of the raw materials to ensure the cleanliness of the raw materials. 2. The process requires the supplier to supply a bill of materials, and the quality inspection department has to conduct an experiment to store and reserve the solution if the composition and impurity content meet the process requirements. 3. Vacuum induction melting should be filled with argon under a vacuum of 0.1 Pa, melted into an alloy at 1300 degrees Celsius, and the ingot should be rapidly cooled to obtain an alloy with fine grains and evenly arranged. 4. According to different conditions, the raw materials should make up for the burning loss of rare earth, manganese and other volatile elements. 2. 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 arrangement should be fine and fine without looseness and impurities; 2. Electrochemical capability: You should meet the company's specifications Ask, otherwise you can’t refuse. 3. Chemical composition: The chemical composition of the alloy should be consistent with the design composition. 3. Thermal solution: The vacuum thermal solution furnace is selected and maintained by filling argon after vacuum pumping. The key to the thermal solution process is to make the product averagely stable (eliminate internal stress), to ensure the alloy's platform pressure, good averageness and good cycle life characteristics. The focus is to ensure the temperature and vacuum, and measure the oxygen content. 4. The whole process of alloy cracking, powder making, and packaging is completely closed under argon maintenance to ensure that the alloy has a very low oxygen content. There are four aspects to finished product inspection. 1. Physical function, particle size dispersion, and bulk rate conform to company specifications; 2. Appearance: no discoloration, oxidation, or agglomeration on the surface 3. Electrochemical function: electrochemical capacity, charge and discharge characteristics, cycle life, high current pulse of the alloy Discharge characteristics and temperature characteristics. The inner packaging adopts nylon composite plastic bag vacuum double-layer packaging, the whole box adopts nitrogen plastic bag packaging, and the outer box adopts carton packaging. 4. Chemical characteristics: alloy powder composition, impurity content, alloy PCT curve conform to company specifications; Statement: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact and delete the previous article: Analysis of several lithium battery capacities Detection method