There are many types of batteries available for selection on the market. Today, Shenzhen lithium battery manufacturers will come with you to see which of the many batteries are safer.
At present, domestic lithium batteries for electric vehicles are classified into lithium iron phosphate, lithium manganate and ternary lithium materials according to different cathode materials. However, due to the difference in materials, the performance of the battery varies greatly, and the safety factor is also different.
1. Lithium iron phosphate battery: A lithium ion battery using lithium iron phosphate as a positive electrode material. Lithium iron phosphate has high heat stability and low electrolyte oxidizing ability, so it has high safety; but its defect is low electrical conductivity, which requires modification technology to improve. As a result, the volume is too large and the electrolyte is used in a large amount. Moreover, due to the large capacity, the battery consistency is poor, and currently, lithium iron phosphate technology is still under study.
2. Lithium manganate battery: A lithium ion battery using lithium manganate as a positive electrode material. A cathode material with low cost, safety and low temperature performance, but the material itself is not stable and is easily decomposed to generate gas. Therefore, it is mostly used in combination with other materials to reduce the cost of the battery core, but its cycle life is attenuated faster, bulging is prone to occur, the high temperature performance is poor, and the life is relatively short.
3. Three-element lithium battery: a lithium battery using nickel-cobalt-manganese oxide as a positive electrode material and graphite as a negative electrode material. Energy density ranks high in all lithium battery technologies , around 250kwh/m3. The ternary lithium battery is highly sensitive to temperature and will decompose at around 200 degrees. Moreover, the chemical reaction of the ternary lithium material at high temperatures is more intense, and oxygen molecules are released, and the electrolyte burns rapidly under the action of high temperature, causing an explosion accident. Therefore, the ternary lithium battery can not be used in terms of safety performance, high temperature resistance, life, power discharge effect and the like.
Based on the above analysis, the ternary materials and lithium iron phosphate and lithium manganate are used as positive electrode materials, and each has its own advantages in the application of lithium batteries. If it is safe, the lithium iron phosphate is more worthy of the current choice, and the improvement of safety of ternary lithium has been the direction of major manufacturers.