Discuss the current main production technology and process of lithium-ion batteries

　　 Lithium-ion battery is mainly composed of four parts: positive electrode, negative electrode, non-aqueous electrolyte and separator. At present, the most popular lithium batteries in the market are lithium iron phosphate batteries and ternary lithium batteries. The raw materials of the positive electrodes of the two are quite different, and the production process is relatively close, but the process parameters need to change greatly. If the lithium iron phosphate is completely replaced with a ternary material, the rectification effect of the old production line is not good. For battery manufacturers, it is necessary to replace a large area of equipment on the production line.

　　 Lithium-ion battery is mainly composed of four parts: positive electrode, negative electrode, non-aqueous electrolyte and separator. At present, the most popular lithium batteries in the market are lithium iron phosphate batteries and ternary lithium batteries. The raw materials of the positive electrodes of the two are quite different, and the production process is relatively close, but the process parameters need to change greatly. If the lithium iron phosphate is completely replaced with a ternary material, the rectification effect of the old production line is not good. For battery manufacturers, it is necessary to replace a large area of equipment on the production line.

　　 Ternary polymer lithium battery refers to a lithium battery that uses lithium nickel cobalt manganese oxide as the positive electrode material. The actual ratio of nickel cobalt manganese can be adjusted according to specific needs. Because the ternary lithium battery has a higher energy density (currently, the energy density of ternary lithium batteries in the first-class power battery manufacturers such as Ningde Times can generally reach 200Wh/kg-220Wh/kg. The industry predicts that the ternary battery cell will be reached by 2020. Energy density will reach the level of 300Wh/kg), the passenger car market has begun to turn to ternary lithium batteries, and in passenger cars with higher safety requirements, lithium iron phosphate is more popular. With the development of all-electric passenger cars, ternary lithium batteries are occupying an increasingly important position.　　 The energy density and cost of the two materials are different. Different cars and different car companies have different choices. The production process of the two is roughly the same. The difference is mainly reflected in the use and proportion of materials, the difference in specific process parameters, the equipment cannot be produced in the same line, and the cost of simply transforming and switching capacity is higher (three-dimensional material vs. Requirements such as vacuum dehumidification are strict, and the previous lithium iron phosphate production line basically has no dehumidification requirements), so multiple home appliance core factories will simultaneously deploy and purchase equipment separately in their capacity planning.