How to pack and how to distinguish good from bad 18650 lithium battery pack?

How to pack the 18650 lithium battery pack? The way to pack battery packs for 18650 lithium batteries is to test the material batteries, and connect them in parallel and series to the voltage and capacity you want. Install the protection circuit, and then test the finished product. After the test is completed, insulation packaging can be done. How to distinguish the quality of the 18650 lithium battery pack? 1. The fastest inspection method is to detect the internal resistance and the maximum discharge current. A good quality lithium battery pack has a 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 lightly or moderately with the hand. The hardness is moderate, and there is no soft squeezing feeling, which proves that the lithium battery is a relatively high-quality battery. 4. Look at the weight. Remove the outer packaging and feel the weight of the battery is heavier. If the weight is heavy, it is a high-quality battery. 5. During the live working process of the 18650 lithium battery pack, continue to discharge for about 10 minutes if the battery poles are not hot, 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. There are several forms of lithium battery assembly, one is 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. The third type is steel packaging. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Is it safe?