How to choose a high-quality lithium battery?

How to choose a good lithium battery? On April 15, the new national standard for electric vehicles was officially implemented. As the country's new standards on the weight of electric vehicles become more and more stringent, lithium batteries have become the best choice for electric vehicle batteries. Nowadays, various brands of lithium batteries on the market are good and bad, and it is difficult to distinguish between good and bad! Next, the author will give you some tips for choosing a good lithium battery! 1. Check the appearance and packaging First of all, you can identify the packaging and appearance of the lithium battery product . Although the general product looks deceptive, some inferior products can also be screened out from the outside. 2. Comparing components The components of the lithium battery are proportional to the capacity. If it is a polymer lithium battery, the difference in the components is too large and the capacity will inevitably be insufficient, but some batteries have their own differences in capacity. In addition, it can also be seen from the packaging that the weight of the battery is relatively heavy, if heavy people tend to high-quality lithium batteries. 3. Test the internal resistance and maximum current. In fact, the fastest way to test the performance of a lithium battery is to test its internal resistance and maximum discharge current. High-quality lithium batteries have low internal resistance and large maximum discharge current. Select the 20A range of the multimeter, and directly short-circuit the two-electrode lithium battery. The current should generally be about 10A, or even higher, and it can last for a period of time. It is a relatively stable battery. 4. Work on the test site During the live operation of the lithium battery, if the utility pole that has been continuously discharged for about 10 minutes does not generate heat, it indicates that the battery protection board system is perfect. Generally, the quality of the high-quality protection board lithium battery is better than the ordinary one. lithium battery. Look at most of the batteries used in cell lithium batteries are soft package batteries and 18650 batteries, which are also commonly used materials for lithium battery packaging. The first thing to check is whether the battery is brand new, because there are some small factories in the market that use second-hand batteries to make lithium batteries. The soft-packed lithium battery, also known as a polymer battery, is a kind of soft-packed electrolyte, a gel-like battery that can be made into a variety of shapes, and the battery is safe and will not burst. The current electric vehicle battery is mainly 18650 battery, which mainly uses lithium iron phosphate and lithium manganate and ternary materials. 18650 batteries are generally packaged in steel casing. If the manufacturer has problems during the processing and the quality is not up to the standard, it will cause blasting problems. 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. Previous: Principles of UPS battery capacity selection