Performance decomposition of power lithium battery

The disadvantages of lithium cobalt oxide are relatively short life, low thermal stability and limited load capacity. Like other cobalt hybrid lithium batteries, lithium cobalt oxide uses graphite anodes, and its cycle life is critically limited by the solid electrolyte interface, which shows the gradual thickening of the SEI film and the problem of anode lithium plating during fast charging or low-temperature charging. Lithium cobalt oxide is excellent in terms of high specific energy, but it can only provide general performance in terms of power characteristics, safety and cycle life. At present, there are fewer models using lithium iron phosphate batteries, and its thermal stability is the current lithium battery for vehicles. The best of them, and because the amount of lithium iron phosphate is related to the smaller number of lithium batteries, the burden on its BMS battery management system is less. However, because the battery energy density of lithium iron phosphate batteries is 100-110Wh/kg, the cruising range of the same weight battery is much worse than that of ternary lithium batteries, so most car companies on the market have not adopted it. Lithium manganese oxide batteries can be discharged at a current of 20-30A and have moderate heat accumulation. It is also possible to apply up to 50A1 second load pulse. Lithium manganese oxide is used in power tools, medical equipment, and hybrid and pure electric vehicles; the capacity of lithium manganese oxide is about one third lower than that of lithium cobalt oxide, and the design flexibility allows engineers to choose to maximize the life of the battery , Or increase the maximum load current or capacity. At present, most car companies use ternary lithium batteries, mainly because the energy density of ternary lithium batteries is higher, 200Wh/kg, but the disadvantage of ternary lithium batteries is poor stability. When the temperature is 250- At 350°C, the internal composition begins to be analyzed, and under the same battery energy conditions, the number of monomers of the ternary lithium battery is much greater than that of the lithium iron phosphate battery, which also puts forward higher requirements for its BMS battery management system. With the support and vigorous promotion of policies, my country's new energy industry has developed rapidly in recent years. With the increase in the energy density of lithium batteries and the greatly increased endurance range, it also reduces the mileage anxiety of users using electric vehicles. Models for dealing with mileage anxiety such as charging, battery replacement, and mobile replenishment are also being tried. With the improvement of various technologies, the era of new energy vehicles is gradually accelerating. 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: Analysis of the three major advantages of using lithium iron phosphate battery packs in the communications industry