Lithium battery manufacturing process, what are the lithium battery production and testing equipment? The lithium battery production process is quite complex. Objectively speaking, the production process of lithium batteries is not very consistent for each manufacturer, but most of them are inseparable from these links: material preparation-homogenization-coating-rolling-slitting-baking-winding-in Shell - laser welding - baking - liquid injection - pre-filling - sealing - cleaning - aging - full inspection - warehousing - shipping.

　　Lithium battery manufacturing process

　　Objectively speaking, the lithium battery manufacturing process is divided into three major sections, one is pole piece production, the other is cell production, and the third is battery assembly. In the lithium battery production process, pole piece production is the foundation, battery core production is the core, and battery assembly is related to the quality of the finished lithium battery. The specific steps of the lithium battery production process include positive electrode slurrying, negative electrode slurrying, positive electrode sheets, negative electrode sheets, steel case assembly, liquid injection and testing, and packaging.

　　At present, the cell manufacturing processes of power lithium batteries mainly include winding and lamination. The corresponding battery structures are mainly cylindrical, square, and soft-packed. Cylindrical and square batteries are mainly produced using the winding process, while soft-packed batteries are Mainly using lamination technology.

　　Lithium battery manufacturing has high requirements on equipment performance, accuracy, stability and automation level. Take the preparation of electrode slurry in the lithium battery production process as an example. This link is the most front-end link and the most important link in the entire production process. After all, the electrode slurry mixing and dispersion process has an impact on product quality of more than 30%. %.

　　It can be seen that all aspects of the lithium battery production process are closely related to product quality and safety. Each link in the lithium battery production process must be strictly and carefully managed in order to improve the safety performance of lithium battery products. .

　　Lithium battery production process

　　Lithium battery production process and control: raw materials → raw material inspection → raw material pretreatment → ingredients → ingredient inspection → vacuum induction melting → rapid cooling ingot casting → semi-finished product inspection → heat treatment → coarse crushing → milling → screening → post-processing → vacuum or Nitrogen filling packaging→finished product inspection→product.

　　What are the lithium battery production and testing equipment?

　　In the process of producing lithium battery products, lithium battery measurement has become more and more important. Maybe because of a slight error, this batch of products will become scrapped products, and this situation is most common among mass-produced manufacturers. This is also The most important point to note. Therefore, it is becoming more and more important to choose lithium battery testing equipment.

　　1. X/β-ray surface density measuring instrument

　　2. Laser thickness gauge

　　3. Multiple synchronous tracking systems

　　The production process of lithium batteries is relatively complex. The main production process mainly covers the stirring and coating stage of electrode production, the winding and liquid injection stage of cell synthesis, and the packaging and testing stage of chemical encapsulation. The value ratio is about (35~40% ): (30~35)%: (30~35)%. According to Coating Online, the differences mainly come from different equipment suppliers, differences in the proportion of imported/domestic products, etc. The process flow is basically the same, and the value ratio is deviated but generally consistent with this ratio.

　　The lithium battery equipment corresponding to the front-end process of lithium battery production mainly includes vacuum mixers, coating machines, roller presses, etc.; the middle-stage process mainly includes die-cutting machines, winding machines, laminating machines, liquid injection machines, etc.; the back-stage process includes formation machines. , volumetric testing equipment, process warehousing and logistics automation, etc. In addition, the production of battery packs also requires Pack automation equipment.

　　In the lithium battery manufacturing process, the middle process is mainly to complete the forming of the battery. The main process includes sheeting, pole piece winding, die cutting, cell winding and lamination forming, etc. It is currently a fierce competition among domestic equipment manufacturers. A field that accounts for about 30% of the value of lithium battery production lines.

　　The lithium battery Pack production line is relatively simple. The core processes include loading, bracket pasting, welding, testing and other processes. The core equipment is a laser welding machine and various pasting and testing equipment.

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