Why is BYD reversed from lithium iron phosphate to ternary materials?

Recently, BYD said that the company's future plug-in hybrid vehicles will try to use ternary batteries. Before that, BYD has always liked lithium iron phosphate batteries. As a leading company that has always supported lithium iron phosphate regardless of materials and new energy vehicles, why has its attitude changed suddenly? NCM is currently the most mainstream ternary data, and it is also considered to be the future development trend. NCM refers to the ternary material of nickel cobalt manganese oxide lithium. After adjusting the ratio of nickel, cobalt, and manganese, different electrode characteristics are obtained. The current domestic route is still dominated by lithium iron phosphate. Lithium iron phosphate has a better cycle stability function, and the cost is relatively low. Its theoretical energy density is about 160Wh/kg, almost reaching the ceiling of energy density. For example, after doping with single or multiple ions, higher capacity is obtained, and the specific discharge capacity at 1C exceeds 120mAh/g. However, it should be noted that the improvement in energy density can increase the energy density of the battery year-on-year. In addition, a series of issues such as data stability, safety, data cost, and complexity of production processes still need to be resolved. Therefore, these exciting laboratory data still have a long way to go before they become product parameters. The congenital deficiencies of lithium iron lithium have caused more companies to pay attention to ternary data. Most manufacturers of lithium iron phosphate have begun to pay attention to the development of ternary materials. Some of them (such as Tianjin Lishen and AVIC Lithium Battery) have already started mass production of ternary materials lithium batteries. The difference between ternary data and phosphoric acid data. From the comparison of data function alone, ternary data has great advantages, especially the specific capacity and compaction density. The theoretical maximum value of lithium iron phosphate gram specific capacity 170, 155 is basically the upper limit of lithium iron phosphate. At present, the only technology that can be broken is the compaction density, and there is no substantial progress. The difference in standard voltage is a physiological shortcoming that cannot be changed. Comparison of ternary and lithium iron phosphate 18650 batteries (compared with batteries from a top ten company) The basic capacity of ternary batteries is about 2200mAh, and the LFP batteries are at 1500mAh, which is 45% higher than LFP batteries. Basically It can be said that on the 18650 battery, the LFP cell does not have any advantages. The cycle times of LFP batteries are three times that of ternary batteries. Actually, as far as we know, the cycle times of ternary batteries can be 800-1000. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.