Why is lithium iron phosphate the safest battery?

Lithium iron phosphate is the safest battery. As of October 2015, more than 20,000 electric buses in my country have installed CATL power lithium-ion batteries, all of which have achieved zero accidents. As a battery supplier, battery safety has always been the focus of CATL's attention, especially in new energy vehicles. If the safety of power lithium-ion batteries is ignored, the entire new energy bus industry may be endangered. As the core component of the new energy bus, what specific requirements do customers have for the application of power lithium-ion batteries? Hu Jianguo analyzed and pointed out that it includes at least three aspects: safety, reliability and durability. In terms of safety, Hu Jianguo said that the current mature lithium iron phosphate battery technology has been able to minimize the possibility of battery fire; in terms of reliability, CATL’s power lithium-ion battery also guarantees fewer failures and higher Attendance: In terms of durability, CATL is committed to synchronizing the life cycle of power lithium-ion batteries with the life cycle of vehicles. How important is lithium iron phosphate battery-powered lithium-ion battery to the safety of urban buses? Chaoyang District Hu said that the characteristics of urban buses include more adults than fewer adults, no matter what the weather is bad, operation in the city, and any public safety Accidents, according to the characteristics of urban public transportation, it is very difficult for people to escape after the accident, so when using buses equipped with powered lithium-ion batteries, you should pay more attention to the safety of powered lithium-ion batteries. From a product perspective, how is CATL's power lithium-ion battery safe? Hu Jianguo first pointed out that the safety of the battery system should be understood from two aspects: First, the entire process. Starting from the quantum dynamics simulation analysis of the battery, the mechanism analysis, the selection and design of battery materials, the design of the battery, the design of the battery system and the entire manufacturing process must be under safe control. Second, in all aspects, battery system safety includes electrical safety, functional safety, mechanical safety, and chemical safety. As for the chemical safety of the battery system, he believes that the most important thing is the safety of the battery. The safety of the battery should consider how to reduce the probability of heat loss from the selection of battery raw materials, battery design and manufacturing process. He said that CATL is not recommended for use in passenger cars, even though CATL has been processed in batches, using 3-element batteries in passenger cars, and the energy density of the battery has reached 180 watt-hours per kilogram. One is that the safety maturity of lithium iron phosphate batteries is higher than that of ternary (low heat loss probability), and the other is that the energy density of the lithium iron phosphate battery system can meet the needs of passenger cars. Because the volume and space of passenger cars are relatively tidy, the group's efficiency is very high when designing the battery system, as high as 78%. Therefore, for bus users, not only the energy density of the battery, but also the energy density of the battery system installed on the bus. The current energy density of CATL's lithium iron phosphate batteries is 100 watt-hours per kilogram, which means that one ton of batteries can withstand 100 degrees of electricity. CATL has always hoped to be able to assemble more mature and safer products into passenger cars, which is the responsibility of CATL people. In order to ensure electrical safety and mechanical safety and electrical connection, when the battery group CATL will choose a mature welding process instead of the traditional screw connection, to ensure that in the long run, in the case of mechanical shock and thermal shock, stable machinery can be guaranteed The structure and the battery system are connected, and there will be no problems such as loose mechanical and electrical connections. In the design of the battery system, CATL performs simulation first, and then tests and evaluates. The simulation content ranges from micro to macro, including quantum dynamics, mechanical structure topology optimization, topography optimization, size optimization, heat generation analysis, heat loss control, thermal field distribution, mode, vibration fatigue, impact, rock impact, etc. Be able to know the process of each step instead of designing a product through trial and error. After the samples come out at each stage, a full range of tests and verifications must be done in accordance with the standards. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Analyze the development of medical equipment battery technology