How to identify power lithium-ion batteries through UL certification?

UL's testing and inspection of power lithium-ion batteries are embodied in seven standards, namely, shell, electrolyte, use (overcurrent protection), leakage, mechanical test, charge and discharge test, and identification. Among them, mechanical test and charge-discharge test are the two core links with more content. The mechanical test means that the power lithium-ion battery is under pressure through the transformation of mechanical force and mechanical force, and the state shown is the result of the mechanical test. The mechanical test also has seven aspects: extrusion, impact, acceleration, vibration, thermal shock, thermal cycle testing and high-altitude simulation. A qualified power lithium ion battery should be able to achieve three nos after the above test: no leakage, no fire , No explosion is a qualified battery product. Previously, the general Volt electric vehicle fire test that caused widespread concern occurred when the LG lithium-ion battery was mechanically tested. Charge-discharge test is a test method for judging the performance of lithium-ion batteries by the performance of the battery under normal and abnormal conditions. The charge-discharge test also includes five aspects: charge-discharge cycle, short-circuit test, abnormal charge detection, forced discharge test, and overcharge. Among them, the charge and discharge cycle is a normal test. It is required that the battery cell be charged and discharged according to the manufacturer's requirements at 25°C. The cycle is reached when the capacity is 25% of the initial nominal capacity or the cycle is terminated after 90 days. The sample does not appear safe Sexual events. The remaining four items are abnormal tests, in simple terms, three over one short: overcharge, overdischarge, overcurrent, and short circuit test. Test the resistance of power lithium-ion batteries to overcharge, over-discharge, high current, and short-circuit resistance. The scientific use of lithium-ion battery charging is a factor that seriously affects the life of lithium-ion batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.