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

Manufacturers' methods for testing the quality of lithium battery packs. The important test contents of manufacturers are: capacitance test, charge test, discharge test, short circuit test, internal resistance test, voltage test, resistance test, overcurrent protection test, kit test, etc The 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 determine 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. 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. Users can measure the internal resistance and discharge current of the lithium battery pack quality method. If they have relevant tools, they can test the internal resistance and the maximum discharge current. A good quality lithium battery has very small internal resistance and a large maximum discharge current. Use a multimeter with a 20A range to directly short the two electrodes of the lithium battery. The current should generally be about 10A, or even higher, and it can be maintained for a period of time. A good lithium battery pack is relatively stable. Look at the fullness of the appearance. For example, the general lithium battery pack of about 2000mAh is relatively large. The workmanship is more delicate or the packaging is more plump. 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: How to make a lithium battery pack?