Lithium battery knowledge popularization! Which electric vehicle battery is safer?

At present, domestic lithium batteries for electric vehicles can be categorized into a variety of lithium iron phosphate, lithium manganese and lithium ternary materials according to their cathode materials. However, due to the different materials, the performance of the battery is uneven, and the safety factor is not the same.

1. Lithium iron phosphate batteries: lithium ion batteries with lithium iron phosphate as the cathode material. Lithium iron phosphate has high thermal stability and low electrolyte oxidation capacity, so it has high safety. However, its disadvantage is its low conductivity, which needs to be improved by modification techniques. As a result, the battery has a large volume and a large amount of electrolyte.lithium ion battery VS lead acid battery In addition, due to the large capacity, the consistency of the battery is poor. At present, lithium ferrous phosphate technology is still under research.

2, lithium manganate battery: lithium manganate battery can be used lithium manganate as a cathode material of lithium ion battery. This kind of impact battery development has the advantages of low cost, good safety and low temperature performance. However, the lithium manganate material technology itself is not too stable, and is prone to decomposition process to produce different gases. Therefore, it is usually used by using it with other materials as well as hybrid systems to reduce the cost of the cells. However, Li-Mn2O4 batteries have a fast cyclic economic life decay, which can lead to bulging, poor high temperature performance, and relatively short life studies.

Ternary lithium batteries: Ternary lithium batteries use lithium nickel cobalt manganese oxide (LNCMO) as the anode material and graphite as the anode material of lithium batteries. The energy density of ternary Li-ion batteries is the highest of all Li-ion battery technologies, about 250 kWh/m3. However, ternary lithium-ion batteries are very sensitive to temperature and decompose at around 200 degrees. In addition, the chemical reaction of lithium ternary materials is even more violent at high temperatures, releasing oxygen molecules and causing the electrolyte to burn and explode rapidly. Therefore, the performance of lithium ternary battery is not good in terms of safety, high temperature resistance, life and power discharge effect.

Based on the above analysis, ternary materials, lithium ferrous phosphate and lithium manganate have their own advantages as cathode materials in the application of lithium batteries. If safety is the premise of choice, lithium ferrous phosphate is a more worthwhile option at present, while the improvement of the safety performance of ternary lithium batteries has always been the direction of research and development of major manufacturers.

With the development of science and technology, the future of electric vehicle battery technology may be safer and more efficient.lithium battery vs lead acid Therefore, consumers should consider a variety of factors when choosing EV batteries, including safety, energy density, cycle life, etc., and make the most appropriate choice according to their individual needs. At the same time, the government and relevant departments should also strengthen the regulation and standardization of EV batteries to ensure that EV batteries sold on the market meet the safety requirements and safeguard the rights and interests of consumers and the safety of personal property.

In conclusion, understanding the characteristics and safety of different types of EV batteries is an important part of consumers' choice of EVs. By comparing the advantages and disadvantages of lithium iron phosphate, lithium manganate and lithium ternary batteries, we can better understand their performance in different aspects. While each battery has its unique advantages and limitations, lithium iron phosphate batteries are more advantageous in terms of safety. However, as technology continues to evolve, there is reason to believe that safer and more efficient EV battery technologies will emerge in the future. Therefore, consumers should consider various factors when choosing batteries for electric vehicles and make the most suitable choice according to their own needs. At the same time, the government and relevant departments should also strengthen regulation and standardization to ensure that EV batteries sold in the market meet safety requirements and protect consumer rights and interests as well as life and property safety.