Is it safe for new energy vehicles to use ternary lithium batteries?

Ternary lithium battery refers to a lithium battery that uses lithium nickel cobalt manganese oxide as the positive electrode material and graphite as the negative electrode material. Compared with lithium iron phosphate, the ternary lithium battery has higher energy density, better low-temperature discharge performance, and higher charging efficiency. Under high temperature conditions, the ternary materials of the ternary lithium battery will undergo analysis at 200°C, and a violent chemical reaction will occur, releasing oxygen atoms, and will easily burn or explode in high-temperature applications. Ternary lithium batteries are currently the choice of many big car companies. For example, well-known car companies such as BAIC New Energy, BYD, Tesla, and Lifan Motors all use this type of battery. From the technical aspect of the battery itself, although the ternary lithium battery has higher energy density and relatively low price than its two mainstream power lithium-ion batteries, its safety is objectively lower than that of lithium iron phosphate batteries and manganese. Lithium acid battery. Although the battery management system of a well-known brand of electric vehicles using ternary lithium batteries is very powerful, the stability of ternary lithium batteries is inherently relatively poor, even if it adopts a safety protection design that enhances the outer guard plate, cooling system, etc. , But it is still difficult to fully guard against spontaneous combustion accidents of Tesla electric vehicles. It can be seen that the technical route of battery materials is also an important factor leading to frequent fires of new energy vehicles. However, because ternary cathode materials have advantages in battery specific energy, specific power, high-rate charging, and low-temperature performance, ternary lithium batteries will also have better cycle performance. In addition, from the point of view of adaptation policies, because the energy density requirements will be higher in the future, the potential of ternary lithium batteries will also be brought into full play. Coupled with the current continuous enhancement of battery management technology for ternary lithium batteries, its safety performance is naturally very guaranteed. With the state's supervision and testing of new energy vehicles, the current driving safety of new energy vehicles on the market is still very good. As long as the lithium battery is used and charged in accordance with the formal procedures and methods, there will be no major problems In the past, most of the spontaneous combustion vehicles that appeared in the country were black cars with insufficient safety index, and drivers failed to ensure standard use when charging. How safe is the ternary lithium battery? Ternary lithium batteries have poor thermal stability. Oxygen molecules will be analyzed when the temperature is less than 300°C. The flammable electrolyte and carbon materials in the battery will stop at a point. The heat that appears will further aggravate the positive electrode analysis. It will deflagrate within time. In contrast, another widely used lithium iron phosphate battery can last up to 700-800°C without analyzing oxygen molecules, which is much safer. In passenger cars, I know that many excellent companies have done enough for the safety of ternary materials lithium batteries. Our judgment on battery safety should be based on whether it can meet the safety requirements as the standard, and not on the material. Ternary material batteries have a variety of different formulations, and different companies have different safety standards. It cannot be simply said that ternary materials are not safe. But whether it is a ternary lithium battery or a lithium iron phosphate battery, they cannot avoid the hidden dangers of flammability and explosion. Simply put, a large amount of heat will be generated during the charging and discharging of lithium batteries, which will cause the internal temperature of the battery to rise and the temperature unevenness between the single cells, which will cause the new energy of the battery to be unstable. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to extend battery life in life?