What methods can detect the quality of lithium batteries?

How to test the quality of lithium batteries: 1. The fastest test method is to test the internal resistance and maximum power-off current. A high-quality lithium battery has very small internal resistance and a large maximum power-off current. Adopt a multimeter with a 20A range, and the two electrodes of a direct- and short-circuit lithium battery. The current should generally be organized at 10A, so that it is higher, and can be maintained for a period of time. The best battery is related to quietness. 2. Take a look at your appearance. The fullness of the surface, such as the lithium battery of the general 2000mAh organization, is relatively large. Singers are more exquisite than those whose packaging is more full. 4. The weight of the instrument. Cancel the outer packaging to see whether the battery weight is relatively heavy, if the weight is heavy, it is attributed to high-quality batteries. 5. In the process of working with lithium batteries, if the battery diodes are not hot for 10 minutes after the battery is kept out of power, it indicates that the battery protection board system is complete. The quality of lithium batteries that are generally worn with high-quality protection boards are better than those of common lithium batteries. The important reasons for the defects in the test are: 1. The power-off time (essentially 266 minutes) is slightly less than the 5 hours determined by the national standard, that is, the power-off current is slightly larger. If the internal resistance of the battery is considered, the test will be cut off slightly. Too small. 2. The accuracy of the constant current source is not enough, which is lower than the national standard requirement (current innovation within 1%), which is mainly caused by the transistor temperature innovation. 3. The accuracy of the ammeter is lower than that required by the national standard (should be ≤0.5 accuracy). Statement: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.