Are ternary lithium ion batteries and lithium iron phosphate batteries safe?

Are ternary lithium-ion batteries safe? Ternary lithium ion battery refers to a lithium ion battery that uses lithium nickel cobalt manganese ternary cathode material for the positive electrode material. There are many kinds of positive electrode materials for lithium ion batteries, including lithium cobalt oxide, lithium manganate, lithium nickelate, and ternary material. , Lithium iron phosphate, etc. The ternary lithium-ion battery is regarded by the industry as a fast-growing one in the battery technology of pure electric vehicles at home, in contrast to the lithium iron phosphate battery. Regarding electric vehicles, whether it is a commercial or a passenger, it is all about personal safety, and safety must be put first! Ternary lithium-ion batteries are very unreliable in terms of safety. In a car accident, an external impact will damage the battery barrier and cause a short circuit. The heat emitted during the short circuit will cause the battery to run out of thermal control and quickly increase the temperature above 300°C. The thermal stability of ternary lithium-ion batteries is poor. Oxygen molecules will be resolved when the stalemate is less than 300°C. The flammable electrolyte and carbon materials in the battery will stop at a point, and the heat present will further increase the positive It will deflagrate within a period of time. In contrast, another widely used lithium iron phosphate battery can freeze to 700-800°C, and will not resolve oxygen molecules, so it is much safer. Precisely based on serene considerations, in my country, passenger cars equipped with ternary lithium-ion batteries were not able to enter the list of new energy vehicles recommended by the Ministry of Industry and Information Technology. When the ternary lithium ion battery is charged and discharged, because the iron ion oxidation ability is not strong, it will not release oxygen, naturally it is difficult to produce redox reactions with the electrolyte, which makes the charging and discharging process of the ternary lithium ion battery in a peaceful situation in. Not only that, it is difficult for ternary lithium-ion batteries to produce violent redox reverberations during high-rate discharge and even overcharge-discharge processes. At the same time, after lithium is deintercalated, the final volume of the unit cell will be reduced by the lattice change, which just offsets the new volume of the carbon anode in the reverberation. Therefore, the ternary lithium ion battery can maintain the physical layout during charging and discharging. The same, eliminates the hidden danger of battery bursting due to the increase in volume. Generally, the ternary lithium-ion battery pack also has a balance management system, which guarantees the safety of the lithium-ion battery through key parameter control, which is the cooperative characteristic of various lithium-ion battery packs. The safety of the battery of electric vehicles is very important. The advantages of ternary lithium-ion batteries are small size and high energy density, and they are suitable for small vehicles and light-powered vehicles. But if the skills pass the test and the quality is well controlled, it can also be used on large cars. Are lithium iron phosphate batteries safe? The theoretical capacity of the lithium iron phosphate battery is 170mAh/g, and the actual available capacity of the material is 160mAh/g. In terms of safety, the heat of lithium iron phosphate does not increase, and the electrolyte oxidizing power is low, so the safety is high; but the disadvantages are low conductivity, too large volume, and large amount of electrolyte. Due to the large capacity, the consistency of the battery is poor. . Lithium iron phosphate battery is the most peaceful cathode material for lithium ion batteries at present, and does not contain any heavy metal elements harmful to the human body. Oxygen is difficult to precipitate in its olivine layout, which improves the invariance of the material. The production process of lithium iron phosphate batteries is roughly communicated with other types of lithium ion batteries. The focus of the process includes: batching, coating, rolling, sheeting, and winding. In the batching process, the conductive performance of lithium iron phosphate material is relatively poor, so the particles are generally made smaller. The objective result of this is: the inner column is more symmetrical, which promotes the formation of a balanced voltage platform. Maybe keep the state of the battery unchanged. The P-O bond in the lithium iron phosphate crystal is stable and difficult to resolve. Even at high temperature or overcharge, it will not collapse or form a strong oxidizing substance like lithium cobalt oxide communication layout, so it has a splendid security. Some reports pointed out that a small number of samples were found to be burned during acupuncture or short-circuit attempts in actual manipulation, but no explosion occurred. 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: What is the impact of lithium-ion battery charge and discharge rate on battery performance?