Which is the higher energy density of ternary lithium battery and lithium iron phosphate battery pack

Which ternary lithium battery or lithium iron phosphate battery pack has the highest energy density? A ternary polymer lithium battery refers to a lithium battery that uses nickel cobalt manganese lithium ternary cathode material as the cathode material. The ternary composite cathode material precursor product is Using nickel salt, cobalt salt, and manganese salt as raw materials, the ratio of nickel, cobalt and manganese can be adjusted according to actual conditions. The ternary lithium battery is characterized by high energy density and higher voltage, so the battery capacity of the battery pack of the same weight is larger, and the distance of the car is longer and the speed can be faster. But its weakness lies in its poor stability. If there is an internal short circuit or the cathode material encounters water, there will be an open flame. The lithium iron phosphate battery pack is much more stable. Even if the battery board is punctured or short-circuited, it will not explode and burn, and will not catch fire when exposed to a high temperature of 350°C (the ternary lithium battery cannot hold it at 180-250°C). Therefore, in terms of safety performance, the lithium iron phosphate battery pack is slightly better. Ternary lithium battery energy density: 300Wh/kg energy density successfully broke through my country's ternary lithium battery and entered the era of high energy density 3.0. Recently, my country has made a major breakthrough in the development of high nickel cathode materials and power lithium-ion battery cells. Tianjin Lishen Battery Co., Ltd. has developed an NCA ternary high specific energy power lithium battery with an energy density of more than 300wh/kg. Industry concerns. In addition, in terms of the ternary lithium battery to be followed up, BYD’s ternary lithium battery has the conditions for mass production, and the energy density has reached 200Wh/kg. The goal of BYD's ternary lithium battery is to reach 240Wh/kg in 2018 and 300Wh/kg in 2020. Industry insiders said that the current single energy density of ternary lithium batteries is close to the limit, and it is difficult to break through. To further increase the energy density of ternary lithium batteries, it is necessary to further increase the proportion of nickel in the battery. However, after the proportion of nickel in the battery increases, due to the poor thermal stability of high nickel, the thermal reaction inside the battery will be very intense, and safety issues are worrying. Relying on the ternary lithium battery technology route, it is very difficult to achieve the energy density of power lithium-ion battery 350Wh/kg. Therefore, the industry hopes to rely on solid-state batteries to further increase battery energy density. Energy density of BYD lithium iron phosphate battery: At present, the single energy density of BYD lithium iron phosphate battery pack is 150Wh, and BYD plans to continue to increase the energy density to 160Wh. In addition to lithium iron phosphate batteries, BYD is also simultaneously developing ternary lithium batteries. If the technology of ternary lithium batteries is combined with lithium iron phosphate batteries and some adjustments are made to the original practice of using graphite as a negative electrode material, then around 2020 , BYD plans to increase the single energy density of lithium iron phosphate battery packs to 200Wh. BYD's lithium iron phosphate battery has a single energy density of 150Wh/kg, and BYD's ternary lithium battery has an energy density of 200Wh/kg. It can be seen that the advantages of ternary lithium materials over lithium iron phosphate batteries are still very clear. Another battery company in Shenzhen, BAK Battery's ternary material power lithium-ion battery cell energy density is nearly 220Wh/kg, which is relatively high in the industry. Comparing the energy density of lithium iron phosphate batteries and ternary lithium batteries The energy density of lithium iron phosphate batteries is far less than that of ternary lithium batteries, but its safety is generally considered to be better than that of ternary lithium batteries. Let me talk about energy density first. At present, the subsidy standard for new energy vehicles depends on the energy density of the battery system. The detailed policy is that when the energy density of the battery system exceeds 120Wh/kg, you can enjoy 1.1 times the subsidy, which is between 90Wh/ Only 1 times subsidy can be enjoyed between kg and 120Wh/kg. It is known that it is not difficult for the current lithium iron phosphate batteries on the market to achieve 90Wh/kg after improvement, but there are very few companies that can achieve 120Wh/kg. BYD has always been focusing on lithium iron phosphate batteries, and this technology is at the leading level in China. Previously, there were rumors that BYD had developed high-energy density lithium iron phosphate batteries with a capacity density of 150Wh/kg, which is comparable to ternary lithium The battery is almost equivalent. 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: Why is a ternary lithium battery easier to ignite spontaneously than a lithium phosphate battery?