903242 battery pack

Introduction to the important process flow of 903242 battery pack production

In the production process of lithium-ion battery packs, pole piece production is the foundation, battery cell production is the core, and battery assembly is related to the quality of lithium-ion battery finished products. The specific links of the lithium-ion battery pack production process include positive electrode slurry pulling, negative electrode slurry pulling, positive pole piece, negative pole piece, steel shell assembly, liquid injection and testing, and packaging.

It can be seen that each production link of the lithium-ion battery pack production process is closely related to product quality and safety. Every link in the lithium-ion battery production process must be strictly and carefully managed to improve the safety performance of lithium-ion battery pack products.

The first step - electrode slurry preparation

It is important to mix the electrode active material, binder, solvent, etc. together, stir and disperse them fully, and form a slurry.

The second step - coating

The slurry prepared in the first step is evenly coated on the current collector (aluminum foil or copper foil, etc.) with a specified thickness, and the solvent is dried.

The third step - pole piece punching

The pole piece produced in the previous step is punched into a specified size and shape.

Step 4 - Lamination

Assemble the positive and negative plates and diaphragms together, and after gluing, form the pole core.

Step 5 - Assemble soft pack battery

Insert the pole core produced in the previous step into the aluminum-plastic film with the pits already punched, and complete the top seal, side seal, etc. (leave a hole for liquid injection), to form a soft pack battery without liquid injection.

Step 6 - Liquid injection

Inject a specified amount of electrolyte into the soft pack battery cell. Of course, the battery cell must be baked and the liquid injection operation must be performed in a low humidity environment. Too much moisture content is not good.

Step 7 - Battery sealing

Extract the gas inside the battery cell in a vacuum environment and complete the sealing.

With the rapid development of electric vehicles and automobiles, the power supply on the vehicle has also developed rapidly, but there are many problems in the production of lithium-ion battery packs, resulting in uneven quality of battery products on the market. The capacity of the lithium-ion battery pack in the later cycle life cannot reach the designed service life. This has a lot to do with the unique production process of the lithium-ion battery pack in production.

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