The ternary lithium battery can not be used in the analysis of the causes of electric buses

Source: 2020 - 04 - 01 hits: giving time ternary lithium battery can not be used for electric bus reason why three lithium-ion battery pack can not be used in electric buses. According to the related media reports, the department of suspended because of the ternary lithium battery materials energy density is larger, there is a big security risk, do not apply to the bus operation. Ternary lithium battery energy is high, it is an important direction of the development of the lithium battery in the future. However, its security has always been the controversy of the industry, it still needs further examination. Three reasons ternary lithium battery can not be used in electric buses lithium batteries with higher energy and better cycle performance, is an important direction of the development of the lithium battery in the future. The ministry is considering the further development of new energy car safety technical threshold, and arrange to open the existing ternary lithium battery passenger vehicle safety standard system models such as risk review. He made it clear that, by the end of the ternary lithium battery bus listed in the catalog of new energy automobile application demonstration. Low ternary material high temperature flammable ternary lithium battery data initial decomposition occurs in about 200 ℃, the elementary decomposition of lithium iron phosphate data in 700 - 800℃。 And chemical reaction of the ternary lithium is more and more intense, in under the action of heat will release oxygen molecules, the activation electrolyte burning, triggered a chain reaction. Lithium iron phosphate releasing oxygen molecules in the process of decomposition, combustion is less intense. Low battery capacity is big, poor heat dissipation in addition to the security risks of three metadata, bus battery of large capacity also increases the risk of ternary lithium battery pack. Is inversely proportional to the safety and energy storage battery, the battery can be used to release the energy, the greater the security risks of its existence, pure electric vehicles usually dozens of kilowatt hours of battery capacity, and hundreds of kilowatt hours of pure electric vehicle battery capacity, battery capacity, also increases the size of the battery and its heat dissipation function, you can add a security question. Lack of recognition system is due to a lack of detection principle, made the ternary lithium battery system safety testing difficult. Single battery driving conditions to plan for lithium-ion battery pack, through strengthening the monitoring of the whole production process, for driving the ternary system to contribute to the safety of lithium-ion batteries, but need the blessing of the corresponding safety inspection principle.