Reasons why electric buses are not suitable for installing ternary lithium batteries

The reason why electric buses are not suitable for installing ternary lithium batteries, Zhang Xiangmu, the director of the equipment industry department of the Ministry of Industry and Information Technology, said that the ternary lithium battery cars with electric vehicle suspensions in the 100th my country Association Forum Conference 2016 were included in the promotion and promotion of new energy vehicles. The catalog of application recommended models expresses our country’s concerns about the safety of power lithium-ion batteries. In fact, in the new car catalog published by the Ministry of Industry and Information Technology on January 14 this year, there are no bus products equipped with ternary data batteries. The reason Zhang Xiangmu gave is that ternary lithium batteries have high specific energy and good circulation function, which is an important development direction for lithium batteries in the future. However, my country started late in this field and there are not enough products for the safety development and verification of passenger cars. . The Ministry of Industry and Information Technology is considering further raising the threshold of new energy passenger vehicle safety technology and arranging to carry out the risk assessment of vehicle models such as ternary lithium battery passenger vehicles under the current safety standard system. He made it clear that before the end of the review, ternary lithium battery buses will be suspended from being included in the 'New Energy Vehicle Promotion and Application Analysis Model Catalog.' ■The high-temperature ternary data of ternary flammable materials poses a greater security risk. Huang xuejie, a researcher at the Institute of Physics of the Chinese Academy of Sciences, said that based on previous relevant experience, the nickel-cobalt-aluminumternel-18650 battery will automatically heat above 180°C. This is difficult to control after a fire, and the lithium iron phosphate data will be hot. It is relatively safe to release above 250°C. From the data characteristics alone, the two types of data will start and diverge after reaching a certain temperature. The initial differentiation of ternary lithium data occurs at around 200°C, and the initial differentiation of lithium iron phosphate data occurs at 700-800°C. Moreover, the chemical reaction of ternary lithium is becoming more and more intense. Under high temperature applications, oxygen molecules will be released to activate the combustion of the electrolyte and trigger a chain reaction. Lithium iron phosphate does not release oxygen molecules during the differentiation process, and the combustion is not so violent. Therefore, judging from the characteristics of the positive data of lithium batteries, ternary lithium is simpler than lithium iron phosphate. ■Large battery capacity and poor heat dissipation. In addition to the safety risks of ternary data, the large capacity of bus batteries also increases the risk of ternary batteries. The yellow mark, battery safety, and batteries that store energy inversely can release energy. The greater the safety risk there is, the battery capacity of pure electric vehicles is generally tens of kilowatt hours, and the battery capacity of pure electric vehicles is hundreds of kilowatt hours. With the increase of capacity, the volume of the battery is also increased, and its heat dissipation function adds the possibility of a safety issue. Huang Xuejie told reporters that power lithium-ion batteries made of lithium batteries must advance their safety functions. The larger the single battery, the higher the safety policy requirements. In addition, the safety of the battery system is not just a question of a single battery. Liu Yanlong, secretary general of the my country Chemical and Physical Power Industry Association, believes that the battery packs, battery pack skills, charging methods, usage methods, maintenance methods, maintenance system reliability, and the usefulness of communication protocols of electric vehicles will all affect the safety of battery packs. ■Lack of a judgment system It is precisely because of the lack of a domestic review system that it is difficult to conduct safety reviews of the ternary battery system. The single battery group will be based on planning the vehicle usage conditions of the battery pack, and by strengthening the monitoring of the entire process of processing, it can help to improve the safety of the ternary battery system, but it must be determined through the corresponding safety review system. Liu Yanlong told reporters, my country lacks a corresponding review system. 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: How many types of explosions of lithium batteries?