How are the lithium-ion safety features achieved?

How to realize the safety features of lithium ion 1) The automatic shut-off protection of the diaphragm at 135°C adopts the international advanced Celgars2300PE-PP-PE three-layer composite film. When the temperature of the battery reaches 120℃, the membrane pores on both sides of the PE composite membrane are closed, the internal resistance of the battery increases, and the temperature rises inside the battery slows down. When the temperature of the battery reaches 135℃, the PP membrane pores are closed, the internal circuit of the battery is open, and the battery is no longer Increase the temperature to ensure that the battery is safe and reliable. 2) Adding additives to the electrolyte. When the battery is overcharged and the battery voltage is higher than 4.2V, the electrolyte additives polymerize with other substances in the electrolyte, the internal resistance of the battery is greatly increased, and a large-area open circuit is formed inside the battery. No longer heating up. 3) Battery cover composite structure The battery cover adopts a scored explosion-proof ball structure. When the battery heats up, part of the gas that occurs during the internal activation of the battery expands, and the internal pressure of the battery increases, and the pressure reaches a certain degree of nicking and breaking and deflation. 4) Various environmental abuse detections Conduct various abuse tests, such as external short circuit, overcharge, acupuncture, impact, incineration, etc., to investigate battery safety performance. At the same time, the battery is subjected to temperature shock tests and mechanical performance tests such as vibration, drop, and shock to investigate the performance of the battery in the actual use environment. 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: Lithium battery manufacturing process and analysis of lithium battery processing raw materials