What are the causes of flatulence in soft-pack lithium batteries?

Causes of flatulence of soft-packed lithium batteries Poor packaging: moisture in the air enters the inside of the cell during the production process, causing the electrolyte to decompose and produce gas. Excessive water content in the battery: In the process, once the water content exceeds the standard, the electrolyte will fail and produce gas. Corrosion: The core of the soft-packed lithium battery is corroded, the aluminum layer is consumed by the reaction, and it loses its barrier to water, resulting in flatulence. Surface damage: Damaged by external force, puncture causes moisture to enter the inside of the cell. In addition, the chemical properties of lithium materials are too active, which brings extremely high risks. When lithium metal is exposed to the air, it will undergo a violent oxidation reaction with oxygen. Bump: Aluminum material is very easy to deform, and it will be easily knocked. The larger the battery cell and the larger the air bag, the easier it is to damage. Short circuit: The contact between the positive and negative electrodes causes a short circuit, and the polymer lithium battery cell generates gas or even smoke. Internal short circuit: Shrinkage, curling, breakage, and burr piercing the separator of polymer lithium battery will cause internal open circuit and bulge. Overcharge and overdischarge: The polymer soft pack battery is overcharged or overdischarged, and the protective plate is abnormal, and the battery cell will be seriously deflated. Solution to flatulence of soft-packed lithium battery 1. Wipe the surface of the lithium battery first, so that it is convenient to paste transparent glue behind. 2. Use a needle to gently pierce the outermost layer of the bulge. Only the outermost layer can be pierced. Do not pierce deeply, only the outermost layer. 3. Clamp it with a wooden board, squeeze out the air inside, and squeeze slowly. Until the squeeze is clean. 4. Immediately stick the small holes with transparent glue, stick a few more layers, and it will be good. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the characteristics of lithium battery termination tape?