Introduce the basic knowledge of the lithium battery manufacturing technology and packaging

Source: 2020 - 03 - 23 days of hits: time to introduce basic knowledge of the lithium battery manufacturing technology and packaging lithium battery in the combination of energy density and power density has incomparable advantage, therefore they are widely used in portable electronic products, power and electric/hybrid vehicles, and other fields. Below the authors introduce the manufacture of lithium-ion batteries for you basic knowledge of the process and packaging. Lithium battery method, the structure of the different structure of different material similar process, but there is a new equipment for lithium ion batteries is mainly composed of the positive and negative, nonaqueous electrolytes, and membrane of four parts. At present, the market more mainly lithium iron phosphate batteries and lithium-ion batteries ternary lithium batteries, and the anode materials is different. Production process close to each other, but the process parameters need to do a lot of change. If use ternary material instead of the lithium iron phosphate, the old production line rectification effect is not good. In terms of battery manufacturers, the production line equipment are in need of replacement. Lithium battery manufacturing process: before, during and after the three process, accounting for about 35% / 30% / 35% lithium-ion battery production process is complicated, the main production of the first electrode manufacturing process mixed coating stage ( Before) , the winding of the battery into the liquid phase ( In the middle) And to encapsulate packaging test phase ( After) Value, ( Purchase amount) About ( ) : 35 - 40% ( 30 to 35) % ( 30 to 35) %。 Differences in main equipment from different suppliers, the differences between the proportion of import/domestic products, etc. , and common technology basis, value proportion error, but basically accord with the proportion. Correspond to the lithium electricity production technology of lithium electricity equipment mainly include vacuum mixer, coating machine, roller, etc. Intermediate process mainly includes the die-cutting machine, winding machine, laminating machine, injection machine, etc. Process after the include chemical machine, testing equipment, technology, warehousing and logistics automation, etc. In addition, the battery production need packaging automation equipment. Lithium-ion batteries in production process: battery center and the connection of lithium battery pole piece manufacturing the result of the front-end process is to complete the preparation of the positive and negative lithium-ion batteries, the first working procedure is stirring. Will is negative solid-state batteries materials evenly mixed, and join the solvent, using vacuum mixer to mix it into a slurry. A mixture of ingredients is the basis of lithium electricity the follow-up process, blend of high quality is subsequent coating and rolling technology the basis of high quality to complete. Coating and rolling process is after the procedure, the coating process after. If incurred during the process of cutting burr, subsequent equipment, electrolyte injection process, even in the process of using battery pose a safety hazard. Lithium power, therefore, the front-end equipment in the process of production, such as mixer, coating machine, road roller, slitting machine, etc. , is the center of the battery manufacturing equipment, related to the quality of the whole production line. Therefore, the front-end equipment value ( The amount) Accounts for the highest percentage of the li-ion battery automatic production line, about 35%. Lithium electricity middle period of the process flow, power first, after winding layers in lithium battery manufacturing process, the intermediate process is mainly completed cells forming, the main technological process including the membrane, membrane winding, die-cutting, battery winding, laminated molding, etc. This is a competition between the domestic equipment manufacturers was areas, accounts for about 30% of the value of lithium battery production line.