How to choose a good lithium-ion 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-ion batteries are becoming the best choice for more and more electric vehicle batteries. Now, various brands of lithium-ion batteries on the market are mixed together, and it is difficult to tell whether they are good or bad! Next, the editor of Topband lithium battery will give you some tips for choosing a good lithium-ion battery!

Check the appearance and packaging

First, the packaging and appearance of lithium-ion battery products can be distinguished. Although the general product looks deceptive, some inferior products can also be screened out from the appearance.

Components compared

The components of a lithium-ion battery are proportional to the capacity. If it is a polymer lithium-ion battery, the difference in the components is too large, and the capacity must be insufficient, but the capacity of some batteries itself is different. In addition, it can also be seen from the packaging that the weight of the battery is relatively heavy, if the heavy person prefers high-quality lithium-ion batteries.

Test internal resistance and maximum current

In fact, the fastest way to test the performance of a Li-ion battery is to test its internal resistance and maximum discharge current. High-quality lithium-ion battery with small internal resistance and large maximum discharge current. Choose a multimeter with a 20A range and directly short-circuit the electrodes of two lithium-ion batteries. The current should generally be around 10A, or even higher, and it can last for a period of time. Relatively stable is a good battery.

Test site work

During the power-on operation of the lithium-ion battery, if the utility pole that continues to discharge for about 10 minutes does not heat up, it means that the battery guard system is perfect.

Look at cells

Most of the batteries used in lithium-ion batteries are soft pack batteries and 18650 batteries, which are also common data for lithium-ion batteries. The first thing to check is whether the battery is brand new, as there are some unpopular small workshops on the market that use used batteries to make lithium-ion batteries. Soft-packed lithium-ion battery, also known as polymer battery, is a soft-packed electrolyte, a gel-like battery that can be made into a variety of shapes, with high battery safety and no explosion.

The current electric vehicle battery is mainly 18650 battery, which mainly uses lithium iron phosphate and lithium manganate and ternary data. The packaging of the 18650 battery is generally a steel shell. If the manufacturer has problems in production and the quality is not good enough, it is easy to explode.

Shenzhen Topband Battery Co., Ltd.，established in 2006, is a wholly-owned subsidiary of Shenzhen Topband Co., Ltd. (002139.SZ). We focus on lithium iron phosphate batteries,with independent research and development in cells and BMS. With the ability to integrate the entire industry chain, we are committed to providing customers with one-stop lithium battery solutions and services. Our quality products are widely used in energy storage and light power.