What are the detection methods for lithium battery performance testing?

What are the methods for testing the performance of lithium batteries? Method one, self-discharge test The self-discharge test of nickel-cadmium and nickel-metal hydride batteries is: because the standard charge retention test time is too long, generally 24-hour self-discharge is used to quickly test its charge To maintain the capacity, discharge the battery at 0.2C to 1.0V. Charge at 1C for 80 minutes, leave it for 15 minutes, discharge at 1C to 10V, measure its discharge capacity C1, and then charge the battery at 1C for 80 minutes, and leave it for 24 hours to measure the 1C capacity C2, C2/C1×100% should be less than 15%. The self-discharge test of lithium batteries is: generally 24-hour self-discharge is used to quickly test its charge retention capacity, and the battery is discharged at 0.2C to 3.0V, constant current and constant voltage 1C Charge to 4.2V, cut-off current: 10mA, after 15 minutes of storage, discharge at 1C to 3.0V to measure the discharge capacity C1, then charge the battery with constant current and constant voltage 1C to 4.2V, cut-off current 100mA, and measure 1C after 24 hours The capacity C2, C2/C1×100% should be greater than 99%. Method 2: Internal resistance measurement The internal resistance of a lithium battery refers to the resistance that the current flows through the battery when the battery is working. It is generally divided into AC internal resistance and DC internal resistance. Since the internal resistance of the rechargeable battery is very small, the internal resistance of the DC is measured. During resistance, since the electrode is easily polarized and the polarized internal resistance appears, its true value cannot be measured; and the AC internal resistance can be measured to avoid the influence of the polarized internal resistance, and the true internal value can be obtained. The AC internal resistance test method is : Utilize the characteristic that the lithium battery is equivalent to an active resistance, give the battery a constant current of 1000HZ, 50mA, and a series of processing such as voltage sampling, rectification and filtering to accurately measure its resistance. Method three, internal pressure test The internal pressure test of the lithium battery is: (UL standard) The simulated battery is tested at an altitude of 15240m (low pressure 11.6kPa) to check whether the lithium battery leaks or bulges. 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 kinds of pollution will be caused by processing lithium batteries?