Are ternary lithium-ion batteries safe? What is the prospect of ternary lithium-ion batteries

Is the ternary lithium-ion battery safe in the end? The ternary lithium-ion battery is also the choice of many big car companies. Such as the common famous car companies such as Beiqi Energy, BYD, Tesla, Lifan Motors, etc., all use this kind of battery. From the technical level of the battery itself, although the ternary lithium-ion battery has higher energy density and relatively low price than its two mainstream power lithium batteries, its safety is objectively lower than that of lithium iron phosphate batteries and lithium iron phosphate batteries. Lithium manganate battery. Although the battery management system of a well-known brand of electric vehicles using ternary lithium-ion batteries is very powerful, the stability of ternary lithium-ion batteries is inherently relatively poor, even if it uses enhanced outer guards, cooling systems, etc. Protection design, but it is still difficult to completely prevent 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-ion batteries will also have better cycle performance. In addition, from the perspective of adaptation policies, the potential of ternary lithium-ion batteries will also be brought into full play because the energy density requirements will be higher in the future. Coupled with the current continuous strengthening of battery management technology for ternary lithium-ion batteries, its safety performance is naturally very guaranteed. With the country'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-ion battery is used and charged in accordance with the formal procedures and methods, there will not be much The problem is that most of the spontaneous combustion vehicles that have appeared in the country before are black cars with insufficient safety indicators, and drivers have failed to ensure standard use when charging. Ternary lithium-ion batteries have poor thermal stability. Oxygen molecules will be decomposed when the temperature is less than 300°C. The flammable electrolyte and carbon materials in the battery will stop at a point, and the heat will further aggravate the decomposition of the positive electrode. It will deflagrate within a period of time. In contrast, another widely used lithium iron phosphate battery can last to 700-800°C without decomposing oxygen molecules and is much safer. In the judgment of battery safety, whether it can meet the safety requirements is the standard, not 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. The prospect of ternary lithium-ion batteries In fact, the market has already given a clear answer on the choice of technical routes for power lithium batteries. Judging from the choice of mainstream international car companies, the one-sided situation of the ternary route has been formed, including Toyota, Volkswagen, Ford, BMW, Tesla and other car companies have adopted the three main models in their electric or plug-in hybrid main models. Yuan power lithium battery. According to statistics, there are 21 companies whose main business is ternary batteries in the four batches of battery catalogs published, accounting for 68%. On the evening when the fourth batch of catalogs was released, Yang Zao, a researcher of new energy vehicles at the Zheshang Securities Research Institute, published an analysis and research report entitled Catalog Issue, 10 times the space for the ternary battery industry: Affected by the dual influence of policies and the market, The penetration rate of ternary power lithium batteries in the fields including passenger cars and logistics vehicles will increase steadily. It is expected that the market demand in 2020 will have more than 10 times the room for growth compared with 2016. Since the state announced the policy of suspending the application of ternary power lithium batteries in commercial vehicles in the first half of the year, the downstream market has subsequently declined significantly, directly affecting the development of ternary battery companies. In terms of vehicle power lithium batteries, the current mainstream is still ternary batteries, which have relatively more efficient performance. Jian Liang said so. In addition, Huang Yanzhong believes that the battery catalog is only a short time to ease the pressure on domestic battery companies. Foreign investment status is not a reason for not being able to enter the catalog. The two joint ventures of Weihong Power and Shanghai Jiexin successfully entered the catalog this time, which means that it is only a matter of time before Samsung and LG enter the catalog. Domestic companies need to grasp the valuable market window to seize the market. , Enhance the ability, and face the fierce competition in the future. 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: What is a lithium ion battery? Introduction to the working principle of lithium-ion batteries