What are the ways to analyze the quality of the 18650 lithium battery pack?

1. The fastest inspection method is to test the internal resistance and the maximum discharge current. A good quality lithium battery pack 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 relatively stable battery is a good battery. 2. Look at the appearance. The fullness of the appearance, such as a lithium battery of about 2000mAh, is relatively large. The workmanship is more delicate or the packaging is more plump. 3. Look at the hardness. The middle part of the lithium battery can be squeezed gently or moderately by hand. The hardness is moderate, and there is no soft squeeze feeling, which proves that the lithium battery is a relatively high-quality battery. 4. Look at the weight. Remove the outer packaging and feel whether the weight of the battery is heavy. If the weight is heavy, it is a high-quality battery. 5. During the live working process of the 18650 lithium battery pack, if the battery poles are not hot after continuous discharge for about 10 minutes, it proves that the battery protection board system is perfect. Generally, the quality of lithium batteries with high-quality protection boards is better than ordinary lithium batteries. Lithium batteries are assembled in the following forms. One is a soft package, that is, aluminum-plastic composite film packaging. The polymer material of this form of lithium battery can be made into any shape; the second is aluminum shell packaging, which is generally suitable for large-capacity lithium batteries , There is a possibility of burning when damaged, but there is basically no possibility of explosion. 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: Do you know what is important for the installation of lithium battery packs?