Which ternary lithium battery or lithium iron phosphate battery is more suitable for electric vehicles?

Which ternary lithium-ion power lithium-ion battery or lithium iron phosphate battery is more suitable for electric vehicles? At noon on February 18, 2020, Tesla announced that it was discussing the use of lithium iron phosphate as a domestically produced type 3 with Ningde City, shocking the industry. Tesla has been using 18650 ternary lithium batteries. Under the influence of ternary lithium batteries, most traditional cars and new cars in my country also use ternary batteries. So why should Tesla consider using lithium iron phosphate batteries? The two most important reasons are price and cycle life. The first is price. According to the introduction of Ouyang Minggao, the academician of the Chinese Academy of Sciences, the kWh capital system of lithium iron phosphate can now reach 600 yuan/kWh, and the 811 kWh capital ternary system, even if it is like Tesla is afraid of 1,000 yuan/kWh , Or even higher, an ordinary new energy vehicle company may cost 1,200 yuan/kWh. Take the 50-degree battery mid-stream car model as an example. If lithium iron phosphate is used, the capital is 30,000 yuan, and the 3 yuan lithium battery is used, and the capital is between 500,000 yuan and 60,000 yuan. The difference in BOM cost of 2-3 million yuan is very high for OEMs. With the reduction and suspension of new energy vehicle subsidies, electric vehicles will have to rely on lithium iron phosphate to compete with gasoline vehicles in price. The bill is easy to calculate. A fuel car with an official price of 150,000 yuan has a BOM of around 105,000 yuan. Generally speaking, the fuel vehicle powertrain accounts for about 25% of the BOM cost, about 26,000 yuan. If the lithium iron phosphate package is used, the cost can be as low as 30,000 yuan, plus 5,000 yuan for other motor drive systems. In addition to policy factors such as double points, purchase tax reduction and exemption, electric vehicles are a little more expensive than fuel vehicles by several thousand yuan, and they are very competitive. The other is battery life. Although there will be some different data in different given situations, in general, the number of charging cycles for an ordinary electric vehicle using a ternary lithium battery is about 800, while the number of charging cycles for an electric vehicle using lithium iron phosphate is about 2500. Assuming that the NEDC driving range is 500 kilometers after the model is fully charged, the total life cycle mileage of the tern-based lithium battery electric vehicle is 400,000 kilometers, and the total life cycle mileage of the lithium iron phosphate electric vehicle can reach 1.25 million kilometers. As for private cars, in their life cycle, they can run 200,000 to 300,000 kilometers, and the battery life of 400,000 kilometers is basically sufficient. But for certain types of commercial vehicles, such as taxis, buses, and trucks, lithium iron phosphate is more competitive because a taxi can easily travel 1 million kilometers in a few years. If you use a ternary lithium battery, you have to buy a car three times, and you can buy a car with lithium iron phosphate. This is also for safety reasons, in the commercial vehicle category, in the energy storage category, lithium iron phosphate is in a dominant position. However, once the automatic control function is implemented, even for private cars, the requirements for the total battery distance will be greatly increased, because the utilization rate of private cars will be greatly increased. Tesla's self-driving artificial intelligence (self-drivingAI) FSD chip is currently being loaded in batches. Musk said that he hopes to have a fleet of driverless taxis by the end of 2020 and plans to process 1 million cars. In this case, extending the cycle life of lithium iron phosphate is certainly a better way. So what will domestic manufacturers do? The picture below shows the proportion of installed capacity of lithium iron phosphate batteries and ternary batteries in my country's automobile industry over the years. It can be seen that the ternary ratio is increasing year by year and is currently in the mainstream. However, at the same time, it should be noted that starting from 2019, domestic OEMs will start using lithium iron phosphate ternary batteries due to subsidies and serious setbacks for the safety of the poor, and Tesla's demonstration will further accelerate the domestic conversion of phosphoric acid Lithium iron. The domestic development trend should be: (1) Lithium iron phosphate is important for commercial vehicles and energy storage. (2) Hybrid vehicles are mainly made of iron phosphate and lithium. (3) Passenger cars are divided into low-end models/high-end models, using lithium iron phosphate; high-end models/special high-end models, starting at 3 yuan. By 2020, there will be many models of lithium iron phosphate on the market, let us wait and see. 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 post: Energy density analysis of various battery types