As a new type of energy storage device, lithium battery has now been used in all aspects of life. However, lithium batteries are more active, and are more likely to catch fire and explode than lead-acid batteries, causing great losses to users. Many electric bicycles now use lithium batteries, but the safety problem of lithium batteries has been plaguing us. So how to choose a lithium battery that is safe and has good battery life? Topband lithium battery to share with you:

There are two main reasons for the fire and explosion of lithium batteries in electric vehicles. One is that the current of the lithium battery is too large during charging, which causes the lithium battery to overcharge and heat up, and finally causes the battery to explode due to thermal runaway.

The second is the violent collision of the lithium battery, which leads to the destruction of the internal diaphragm, which leads to a huge chemical reaction in the internal short circuit of the battery, and a large amount of heat is released to cause a fire risk.

According to statistics, the probability of a lithium battery electric vehicle catching fire is 3 in 10,000, mainly caused by improper charging and failure of the battery protection board. The two major safety protection structures of lithium batteries are its PACK technology and BMS protection board (battery management system).

Common electric vehicle battery packs include soft packs and hard packs. Soft packs are cheaper than hard packs, but have a much lower safety factor and poor shock resistance and heat resistance. Generally speaking, hard pack lithium batteries are used. The battery is better.

The big brand lithium battery attaches great importance to the BMS protection board, which is equivalent to the safety switch of the lithium battery. The BMS protection board of the inferior lithium battery uses inferior materials, and the temperature of the lithium battery cannot be well monitored during charging and discharging, which will lead to Thermal runaway.

The quality of the cells is also related to the safety of electric vehicles. Lithium battery cells are divided into A-level cores, B-level cores, and C-level cores. Many low-quality lithium batteries sold by manufacturers use B-grade cells that have been eliminated from automobiles, or C-grade cells that have been ballasted in factories for a long time. The capacity and performance of these two types of cells are worse, and the battery life performance is also worse.

The types of lithium battery materials for electric vehicles can be divided into three categories: ternary lithium battery, lithium iron phosphate, and lithium manganate. Among them, the ternary lithium of the same level has the largest capacity and the longest battery life, and the lithium iron phosphate has a lower capacity, but has the largest number of cycles and a better safety factor, but the cost is the highest. On the market, lithium iron phosphate batteries are used in high-end models of lithium batteries.

The material of the lithium battery, the quality of the protective plate, the PCAK technology and the capacity of the battery are all necessary considerations when we buy a car. Users only need to know the factory information of the battery through the label information on the outer packaging of the battery. For battery products without this information, you should be careful when you buy them.

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.