Lithium-ion battery assembly process

- Sep 07, 2018 -

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. The earliest battery came from the great inventor Edison, using the reaction: Li + MnO2 = LiMnO2 The reaction is a redox reaction, discharge. 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. Now lithium batteries have become mainstream. The process technology of lithium-ion batteries is very strict and complicated. Here are just a few of the main processes:

1. Pulping A special solvent and a binder are mixed with a powdery positive and negative active material, and stirred at a high speed to form a slurry of positive and negative materials.

2. Coating film The prepared slurry was uniformly coated on the surface of the metal foil and dried to prepare positive and negative electrode sheets, respectively.

3. Assembling according to the positive electrode sheet--separator--negative electrode sheet--the separator is placed in the order from top to bottom, and the battery core is wound up, and then the electrolyte is injected into the sealing process to complete the assembly of the battery. Process to make a finished battery.

4. Chemicalization Charge and discharge test the finished battery with a dedicated battery charge and discharge device, test each battery, and select qualified finished batteries to be shipped.