What kind of lithium ion battery has the best quality?

01Check the appearance and packaging First of all, you can judge lithium-ion battery products from the packaging and appearance. Although the appearance of general products is deceptive to a certain extent, some inferior products can also be screened out from the appearance. 02Comparing weight The weight of lithium ion batteries is directly proportional to the capacity. If it is a polymer lithium ion battery, if the weight difference is too large, the capacity will definitely be insufficient, but there are differences in the size of the capacity of some batteries. In addition, you can also feel the weight of the battery from the outer packaging. If the weight is heavy, it is biased towards high-quality lithium-ion batteries. 03 Detection of internal resistance and maximum current In fact, the fastest inspection method to determine the performance of lithium-ion batteries is to detect internal resistance and maximum discharge current. Good quality lithium-ion batteries have very small internal resistance and large maximum discharge current. Use a multimeter with a 20A range and directly short the two electrodes of the lithium-ion 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. 04 Test live working. During the live working process of the lithium-ion battery, 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-ion batteries with high-quality protection boards is better than ordinary lithium-ion batteries . 05Look at the battery cells Most of the batteries used in lithium-ion batteries are soft-pack batteries and 18650 batteries, which are also common materials for lithium-ion battery packs. First check whether the batteries are brand new, because there are some bad small workshops on the market that use second-hand batteries to make lithium-ion batteries. Soft-packed lithium batteries, also known as polymer batteries, are batteries with a gel-like soft-packed electrolyte that can be made into various shapes. The battery is safe and will not explode. The current electric vehicle batteries are basically 18650 batteries, which are mainly made of lithium iron phosphate, lithium manganate and ternary. The packaging of 18650 batteries is generally made of steel. If the manufacturer has problems during processing and the quality is not good enough, it is easy to explode. 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. Previous article: What about polymer lithium ion batteries?