Decompose the advantages and disadvantages of lithium iron phosphate batteries and ternary lithium batteries

Ternary lithium battery: If the ternary lithium battery has an internal short circuit or the positive electrode material meets water, there will be an open flame. Therefore, the general ternary lithium battery will have a layer of steel protection. Tesla has carried out all-round protection for the battery pack, but in extreme collision accidents, there are still hidden dangers of fire. Lithium iron phosphate battery: Lithium iron phosphate battery is much more stable. Even if the battery plate 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. Living). Therefore, in terms of safety performance, lithium iron phosphate batteries are slightly better. Energy density: Ternary lithium battery: Ternary lithium battery has a higher energy density and higher voltage, so a battery pack with the same weight has a larger battery capacity, and the car can run farther and faster. Service life: Ternary lithium battery: The theoretical life of a ternary lithium battery is 2000 charge-discharge cycles, but in actual use, after 900 charge-discharge cycles, the battery capacity basically decays to 55%. However, if each battery charge and discharge is controlled to work in a cycle of 0%-50% or 25%-75%, even after 3000 charge-discharge cycles, the battery capacity can basically be maintained at about 70%, but this requires Very good battery management system. Lithium iron phosphate battery: Even after 3000 times of 0-100% charging and discharging, the capacity of the lithium iron phosphate battery will decrease to 80%. Therefore, the battery management system of the lithium iron phosphate battery is not so complicated, and it is further reduced. The research and development cost of the whole vehicle is reduced. Cost of use: Our country has abundant reserves of lithium ore, iron oxide and phosphate, and there are advantages in manufacturing lithium iron phosphate batteries. Since my country lacks cobalt ore, it will be difficult to manufacture ternary lithium batteries that must use cobalt. Therefore, it is very practical for many Chinese car companies (including battery companies) to develop lithium iron phosphate batteries. Therefore, currently on the market using ternary lithium batteries for electric vehicles, the power lithium-ion batteries are basically foreign brand products (Japan Panasonic, South Korea SK, etc.), and the price is correspondingly more expensive than the models using lithium iron phosphate batteries (same level) some. Low temperature decay ability: The discharge performance of ternary lithium battery at low temperature is better than that of lithium iron phosphate battery. 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: Analysis of common misunderstandings in the use of lithium batteries