How to choose a good lithium battery?

How to choose a good lithium battery? On April 15, the new national standard for electric vehicles was officially implemented. With the country's stricter regulations on new standards for electric vehicle weight and other aspects, lithium batteries are becoming the best choice for more and more electric vehicle batteries. Now, various brands of lithium batteries on the market are mixed together, 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, you can distinguish the packaging of lithium battery products And appearance. Although the general product looks deceptive, some inferior products can also be screened out from the outside. 2. The components of the lithium battery to be compared are proportional to the capacity. If it is a polymer lithium battery, the difference in the components is too large, and the capacity must be insufficient, but there are differences in the capacity of some batteries. 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. Choose a multimeter with a 20A range and directly short-circuit the electrodes of the two lithium batteries. The current should generally be about 10A or even higher, and it can last for a period of time. It is relatively stable and is a good battery. 4. Work on the test site. During the work process of the lithium battery, if the utility pole that is 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 that of the ordinary lithium battery. . Look at most of the batteries used in cell lithium batteries are soft pack batteries and 18650 batteries, which are also commonly used data for lithium batteries. The first thing to check is whether the battery is brand new, because there are some unpopular small workshops on the market that use second-hand batteries to make lithium batteries. Soft-packed lithium battery, also known as 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 explode. The current electric vehicle battery is mainly 18650 battery, which mainly uses lithium iron phosphate and lithium manganate and ternary data. The packaging of 18650 batteries is generally made of steel. If the manufacturer has problems in 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. Previous: Power Lithium-ion Battery Management System Hardware Design Technology