Method for preparing lithium battery

Lithium battery production process:

The first step - electrode slurry preparation

Mainly, the electrode active material, the binder, the solvent, and the like are mixed together, and the mixture is sufficiently stirred and dispersed to form slurry.

The second step - coating

The slurry prepared in the first step is uniformly applied to a current collector (aluminum foil or copper foil, etc.) at a specified thickness, and the solvent is dried.

The third step - the pole piece die cutting

The pole piece produced in the previous step is die cut into a specified size shape.

The fourth step - lamination

The positive and negative electrodes and the separator are assembled together, and after the glue is finished, a polar core is formed.

Step 5 - Assembling the soft pack battery

The pole core produced in the previous step is loaded into the aluminum plastic film which has been punched, and the top seal, the side seal, etc. (and a mouth injection liquid) are formed to form a soft pack battery which is not filled with liquid.

The sixth step - injection

A specified amount of electrolyte is injected into the inside of the soft pack. Of course, the battery core should be baked, and the liquid injection operation is carried out in a low humidity environment, and the moisture content is too good.

Step 7 - Battery Seal

The gas inside the cell is withdrawn and sealed in a vacuum environment.

Method 1: The special solvent and binder for pulping are separately mixed with the powdery positive and negative active materials, and stirred at a high speed to form slurry of positive and negative materials.

Method 2, the coating film is uniformly coated on the surface of the metal foil, and dried to form positive and negative pole pieces respectively.

Method 3, assembly according to the positive electrode sheet - the diaphragm - the negative electrode sheet - the diaphragm is placed in the order from top to bottom, after winding to form the battery core, and then into the electrolyte, sealing and other processes, that is, complete the battery The assembly process is made into a finished battery.

Method 4: The product is charged and discharged with a dedicated battery charging and discharging device and each battery is tested, and a qualified finished battery is screened to complete the production.

A "lithium battery" is a type of battery using a lithium metal or a lithium alloy as a negative electrode material and using a nonaqueous electrolyte solution. Lithium metal batteries were first proposed and studied by Gilbert N. Lewis in 1912. In the 1970s, M.S. Whittingham proposed and began researching lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal are very demanding on the environment. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream.

Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. The fifth-generation lithium-metal battery of rechargeable batteries was born in 1996, and its safety, specific capacity, self-discharge rate and performance price ratio are better than lithium-ion batteries. Due to its own high technical requirements, only a few companies in the country are producing such lithium metal batteries.

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