Comparative analysis of energy density between lithium iron phosphate battery and ternary lithium ion battery

Comparative analysis of the performance of lithium iron phosphate batteries and lithium ternary batteriesCompare the performance of lithium iron phosphate materials and ternary lithium ion batteries, lithium iron phosphate and lithium ternary batteries are safe, energy density, charge and discharge efficiency Lithium iron and lithium ternary batteries, etc. In today's power lithium battery market, there are important lithium iron phosphate batteries and ternary lithium ion 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 batteries, and safety is also one of the most important indicators of power lithium-ion batteries. Then, the differences and connections between the two lithium-ion batteries are introduced from four aspects: energy density and safety, temperature adaptability, and charge and discharge efficiency. 1. Comparative analysis of the energy density of lithium iron phosphate and ternary lithium ion batteries 1. The energy density of lithium iron phosphate batteries is very different from ordinary lithium ion batteries. At present, the new energy vehicle subsidy standard takes the energy density of the battery pack system as an important indicator. It should be noted here that the energy density of the automotive power lithium battery pack produced by Lilang Battery has reached 125Wh/kg. 2 Energy density, the energy density of lithium iron phosphate battery cells is usually 90-120wh/kg, and the energy density of ternary lithium ion battery cells can reach 200wh/kg, and the energy density advantage of ternary lithium ion batteries is more obvious. This is also the large number of online ternary lithium-ion battery production lines in China in recent years, coupled with the persistence of the technical direction of ternary lithium-ion batteries in Japan and South Korea, which has injected strong confidence into the market. Comparative analysis of the safety of lithium iron phosphate and lithium ternary batteries We understand that in terms of material system, the decomposition temperature of the positive electrode material of the ternary lithium ion battery is about 200 ℃, and the decomposition temperature of the positive electrode material of the lithium iron phosphate battery is about 700 ℃. In the laboratory test environment, there is basically no fire in short-circuit lithium iron phosphate battery cells, and there is no ternary lithium ion battery. When using ternary lithium ion batteries, higher requirements are especially placed on thermal management. Regarding the vehicle battery pack, its safety measures are more complete and scientific. Effectively manage the lithium-ion battery through BMS, so that the battery is in a safe working state. Comparative analysis of the temperature adaptability of lithium iron phosphate and ternary lithium ion batteries my country has a vast territory and a complex climate. From the northernmost provinces of Northeast China to the southernmost island of Hainan, the temperature changes are very abundant. In Beijing, for example. As an important market for electric vehicles in Beijing, the highest temperature in summer is around 40℃, and the highest temperature in winter is around minus 16℃ or even lower. This temperature range is obviously suitable for ternary lithium-ion batteries with better low-temperature performance. And pay attention to the high temperature resistance of lithium iron phosphate batteries, which will appear a little thin in winter in Beijing. In addition, the high temperature resistance of ternary lithium-ion batteries is not much different from that of lithium iron phosphate. Ternary lithium ion battery or lithium iron phosphate battery can be seen from the figure above, with 25℃ as the standard room temperature, under the principle of lithium ion battery, lithium iron phosphate and lithium ternary battery are discharged at 55℃ and 25℃ respectively The discharge capacity is basically the same. At -20°C, the advantages of ternary lithium-ion batteries and lithium iron phosphate batteries are more obvious. 4. Comparative analysis of charging and discharging efficiency of lithium iron phosphate and ternary lithium ion batteries. In addition to battery life, charging is also an important part of the actual use of electric vehicles. The charging efficiency of ternary lithium ion batteries is much better than that of lithium iron phosphate batteries. Big advantage. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous: Can two batteries in parallel double the battery life of the drone?