Performance comparison of lithium iron phosphate battery and ternary lithium battery

Performance comparison of lithium iron phosphate batteries and ternary lithium batteries In today's power lithium-ion battery market, there are important lithium iron phosphate batteries and ternary lithium batteries. The important feature of the two is the difference in energy density and safety. Energy density is related to the endurance of power lithium-ion batteries, and safety is also one of the most important goals of power lithium batteries. Next, let us analyze the difference and connection between the two lithium batteries from the four aspects of energy density and safe power generation, temperature adaptability, and charge and discharge power: The energy density of the lithium iron phosphate battery is very different from that of the ternary lithium battery. different. The current subsidy standard for new energy vehicles uses the energy density of the battery pack system as an important indicator. The policy stipulates that when the energy density of the battery system exceeds 120Wh/kg, it can enjoy 1.1 times the subsidy, and only 1 times the subsidy between 90Wh/kg and 120Wh/kg. It is necessary to explain here that the energy density of the automotive power lithium-ion battery pack processed by the nominal technology battery has reached 125Wh/kg. The energy density of lithium iron phosphate battery cells is usually 90-120wh/kg, and the energy density of ternary lithium battery cells can reach 200wh/kg. The advantages of the energy density of ternary lithium batteries are more obvious, which is also In recent years, a large number of online reasons for the location of the ternary lithium battery processing line, coupled with the persistence of the technical direction of the ternary lithium battery in Japan and South Korea, have injected strong confidence into the market. Safety We know that in the material system, the differentiation temperature of the cathode material of the ternary lithium battery is about 200℃, and the differentiation temperature of the lithium iron phosphate battery of the cathode material of the vacuum ball sealer is about 700℃. In the laboratory test environment, the short-circuited lithium iron phosphate battery cell did not catch fire at all. Otherwise, the ternary lithium battery should put forward higher requirements for thermal management when using the ternary lithium battery. Regarding vehicle battery packs, safety measures are becoming more and more sophisticated and scientific. Effectively manage the lithium battery through BMS to keep the battery in a safe operating state. Temperature Adaptability my country has a vast territory and chaotic climate. From the three northernmost provinces of Northeast China to the southernmost island of Hainan, temperature changes are very abundant. In Beijing, for example. As an important shopping center for electric vehicles, the highest temperature in Beijing in summer is around 40°C, while the highest temperature in winter is around -16°C or even lower. This temperature range is obviously suitable for low-temperature ternary lithium batteries with better performance. Lithium iron phosphate batteries emphasize the ability to withstand high temperatures, which will be a little weak in winter in Beijing. More importantly, the high temperature resistance of ternary lithium batteries is not much different from that of lithium iron phosphate. In addition to battery life, charging and discharging power is also an important part of the practical application of electric vehicles. Ternary lithium batteries have great advantages over lithium iron phosphate batteries in terms of charging power. It can be seen from the table that when the ternary lithium battery and the lithium iron phosphate battery are charged below 10C, there is no significant difference in the constant current ratio. When the charging exceeds 10C, the constant current ratio and charging power of the lithium iron phosphate battery drop rapidly. Lithium iron phosphate is still the same as the three on the market, and each has its own advantages. With the rapid development of battery technology, revolutionary changes will also occur in the near future. The mature technology of ternary lithium battery and lithium iron phosphate battery occupy a place in the market by virtue of their respective advantages. 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 lithium batteries for un38.3 test items