What are the specific methods for testing the quality of lithium battery packs?

The sub-capacity test is a standard, regular and fast charge-discharge test with 0.2C, 0.5C and 1C respectively. It is important to activate the lithium battery pack and judge its capacity and performance. Charge and discharge test The charge and discharge test is to judge whether the charging and discharging circuit of the lithium battery pack is working normally. The test has certain requirements regarding charging voltage and current. Short circuit test The purpose of the short circuit test is to judge whether the short circuit protection function of the lithium battery pack is normal. Under normal circumstances, the test method is to use a microcomputer tester. When testing, it should be noted that the short-circuit time should be less than three seconds. It is not possible to use the multimeter current or voltage file for short-circuit testing. Internal resistance test The internal resistance test is an indicator to judge the self-consumption of the lithium battery pack. When the internal resistance is too large, it will affect the discharge or even fail to discharge. Over-current protection test When the lithium battery pack is fully charged, use an adjustable resistor to adjust the discharge current to gradually increase the current. When the discharged current is greater than a certain voltage value, the discharge loop current will be disconnected and become zero. The current before the recording current is disconnected is the overcurrent protection current. 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: What are the methods to analyze the quality of 18650 lithium battery packs?