How to choose the Grade A lithium-ion lifepo4 battery cells?
Lithium battery cathode materials mainly include ternary materials, lithium iron phosphate, lithium cobaltate, lithium manganate and so on. Among them, lithium iron phosphate is more often used in the field of power batteries and large energy storage; lithium manganate is mainly used in the field of power batteries and energy storage, and more mixed with ternary materials.
Lithium-ion battery application prospects are indeed very bright, it can be used not only for electronic products, power tools, and energy storage and even in electric vehicles are also recognized as otherwise the choice, so the future is bright.
The lithium-ion battery has the characteristics of light weight, large energy storage, high power, no pollution, etc. It is also more and more widely used in various fields, and its research and production have made great progress. Lithium-ion batteries in electric vehicles as a power source have become a new trend in the development of electric vehicles. Although many electric vehicles are still using lead-acid batteries, but with the promotion and use of lithium batteries, it is believed that lithium batteries will replace lead-acid batteries as the main power source of electric vehicles.
Next I give you a few tricks how to pick out a good lithium battery!
1, check the appearance and packaging
First, you can look at the packaging and appearance of lithium battery products. Although the appearance does not necessarily represent the root of a product, but a good product will not leave a worn out appearance, the appearance of a certain deceptive, but also from the appearance of screening out some inferior products.
2, Compare the weight
Although the lithium battery is small and large capacity, but its weight is proportional to its capacity, if it is a lithium polymer battery, the weight difference is too large, the capacity will certainly be insufficient, although there are some differences in the size of the battery itself capacity. In addition, you can also sense from the outer packaging whether the weight of the battery is relatively heavy, if the heavy is biased toward high-quality lithium batteries, so you can choose a a relatively heavy lithium battery
3, test the internal resistance and maximum current
If the conditions allow, you can choose to test the maximum current of internal resistance, because the fastest way to judge the performance of lithium batteries is to test the internal resistance and maximum discharge current. Good quality lithium battery, the internal resistance is very small, and the maximum discharge current is very large. For example, using a 20A range multimeter, directly shorted to the two electrodes of the lithium battery, the current should generally be about 10A, or even higher, and can be maintained for a period of time, relatively stable is a good battery.
4, testing the work with electricity
General lithium battery with high quality protection plate quality are better than ordinary lithium batteries, in the lithium battery charged work process, continuous discharge for about 10 minutes battery poles do not get hot for lithium batteries with high quality protection plate, and the battery protection plate system is perfect.
5, look at the battery cell
Most of the cells used in lithium batteries are soft pack cells and 18650 cells, which are also the more common materials for lithium battery pack cells. First of all, check whether the core is brand new, because there are some bad small workshops on the market using second-hand cores to make lithium batteries. Soft pack lithium battery cells, also known as polymer cells, is a soft pack electrolyte in the form of gel, can be made into a variety of shapes, high battery safety, will not explode.
