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release time:2023-10-16 Hits: Popular:AG11 battery
Lithium-ion battery production process Stirring, coating, winding, and testing are the main production processes of lithium batteries. 1. Slurry stirring is an important part of lithium-ion battery equipment. The positive electrode slurry of lithium-ion batteries is composed of adhesives, conductive agents, positive electrode materials, etc., and the negative electrode slurry is composed of adhesives, graphite carbon powder, etc.; positive and negative electrodes slurry
Lithium-ion battery production process
Stirring, coating, winding, and testing are important production processes for lithium-ion batteries.
1. Slurry stirring is an important part of lithium-ion battery equipment. The positive electrode slurry of lithium-ion batteries is composed of adhesives, conductive agents, positive electrode materials, etc., and the negative electrode slurry is composed of adhesives, graphite carbon powder, etc.; positive and negative electrodes The preparation of slurry includes the mixing, dissolution, and dispersion of liquids and liquids and liquids and solid materials. The quality of slurry dispersion directly affects the quality and performance of lithium-ion batteries.
2. Coating determines the consistency and excellence of the battery and occupies a technical position in battery manufacturing. Regardless of the type of battery produced (cylindrical or prismatic, for example), the coating machines used in manufacturing are the same; different types of batteries require different types of winding machines.
Low temperature lithium iron phosphate battery 3.2V 20A -20℃ charging, -40℃ 3C discharge capacity ≥70%
Charging temperature: -20~45℃ -Discharge temperature: -40~+55℃ -40℃ Support maximum discharge rate: 3C -40℃ 3C discharge capacity retention rate ≥70%
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3. In addition to lithium-ion battery winding machines, there are also capacitor winding machines, textile winding machines, etc. According to the operation mode of the machine, it can be divided into manual winding machine, semi-automatic winding machine and fully automatic winding machine.
4. The importance of testing items has become increasingly prominent. Lithium-ion batteries are easy to burn or explode due to short circuit, overcharge, etc. In applications, they will be combined with protective boards to form finished batteries; in applications with high energy density, lithium-ion batteries need to be combined in series and parallel to form a lithium-ion battery pack. managed by the battery management system (BMS).
It can be seen that the lithium-ion battery production process is relatively long, including more than 50 processes, and correspondingly requires more than 50 types of equipment. The entire manufacturing process can be divided into four process sections: pole piece production, cell assembly, cell activation detection and battery packaging. Among them, equipment related to pole piece production is called front-end equipment, cell production-related equipment is mid-range equipment, and cell activation detection is and battery packaging devices are back-end devices.
In recent years, lithium-ion battery production has developed toward integration, line-integration, and automation. Lithium-ion battery automated production lines provide customers with standardized products. Traditional development methods cannot cope with the rapidly changing needs of customers.
The quality of lithium-ion batteries is of vital importance. The main problem in the current domestic lithium-ion battery industrialization is poor battery quality consistency. The reason is mostly due to manual operation and poor equipment accuracy resulting in large system errors and the inability to sustain production. To fundamentally solve the problem of poor quality consistency in batch production of lithium-ion batteries, we must also improve the control accuracy of production equipment and the level of automation of the production line.
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