Do you know what problems are generally encountered during the processing of lithium battery packs?

The production process of lithium battery packs mainly includes aluminum plastic film forming process, top side sealing process, liquid injection, pre-sealing process, standing, forming, fixture shaping process, etc. The following discusses the specific manufacturing process of the lithium battery pack. In the aluminum-plastic film forming process, the surface of the aluminum foil is treated with water to wash out the oil and chromic anhydride passivation. Due to the tension of the water surface, the oil in the micropores of the aluminum foil cannot be cleaned, resulting in defects in the subsequent process. The surface of the aluminum foil is coated with a UV layer, the stiffness of the aluminum foil is not enough, and the dry method is prone to wrinkles. When the adhesive is not effective enough when it is configured, it is easy to cause delamination and peeling of the aluminum-plastic film. When the liquid injection lithium battery pack is in the liquid injection step, if the water content in the liquid injection chamber is high, it will react with the solute lithium hexafluorophosphate to generate HF acid, which has a great impact on the electrochemical performance and safety performance of the battery. If the lithium battery pack stays in the injection chamber for too long, it will absorb more water and also generate HF acid. In the process of chemical transformation, the formation of the SEI film will be affected by the constituent materials and the external temperature. If there is a problem in the formation of the SEI film, the irreversible capacity of the lithium battery pack for the first charge and discharge will increase, and the charge and discharge efficiency of the electrode material will also be reduced. There are many steps in the processing of lithium battery packs, and if you want to process a lithium battery pack with qualified product quality, you must ensure that each step does not go wrong. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Do you know the correct charging method for lithium battery packs?