Chaowei has multiple technical routes in parall -Lithium - Ion Battery Equipment

Chaowei Battery adheres to multiple technical routes in parallel -Lithium - Ion Battery Equipment

Recently, the Ministry of Industry and Information Technology released the "Catalogue of Recommended Models for the Promotion and Application of New Energy Vehicles", in which no ternary electric commercial buses have been found, which means that the models that have not entered the "Catalogue" will not be able to enjoy government subsidies and purchase tax-exempt (10%) vehicles. Preferential policies. A "suspend order" for ternary lithium batteries has thrown a "bomb" into China's new energy vehicle industry, which is advancing rapidly, which has triggered a technical battle for lithium battery research and development, and has also brought huge uncertainty to the development of the industry. sex. Some manufacturers take the high-level route--diplomatic credentials, and some take the grass-roots route--jointly sign the letter, which is very lively.(Lithium - Ion Battery Equipment)

Among the many opinions standing in line, Dr. Kirk, vice president of the Chaowei Group Research Institute and a national expert, said in an exclusive interview with reporters that because Chaowei has always adhered to multiple technical routes and products of various specifications in parallel, the power batteries put into the market in batches Among the products, there are not only the main lithium iron phosphate battery system, but also the ternary material system. Therefore, the ternary lithium battery was temporarily suspended, which has little impact on Chaowei's production plan.

Ternary lithium battery has a tragic fate

At present, as the two major camps in the power battery industry, ternary lithium batteries and lithium iron phosphates have their own advantages in performance. The ternary lithium battery has high energy density, fast charge and discharge speed, but poor stability and safety; while the technology of lithium iron phosphate is relatively mature, the safety performance is relatively outstanding, but the energy density is relatively low.

In the initial stage of domestic power battery industrialization, considering the technological maturity, many companies choose to mass-produce lithium iron phosphate batteries. In February last year, the Ministry of Science and Technology issued the "National Key Research and Development Program for New Energy Vehicles Key Special Implementation Plan", proposing that the energy density of car power batteries should reach 200Wh/kg by the end of 2015. Judging from the indicators specified therein, the ternary lithium battery is currently the most likely battery system to achieve the goal. The ternary lithium battery industry, bathed in the sunshine of government policies, has also ushered in a "spring" of rapid development. Many battery companies, including Tianjin Zhongju and Wanxiang, have reversed the trend and invested a lot of money, equipment, human resources research and development, and increased production of ternary lithium batteries. As soon as this "suspend order" came out, "safety" hit many companies, causing a great uproar and making the fate of ternary lithium batteries erratic.

Suspension order sparks security battle

The Ministry of Industry and Information Technology has temporarily suspended ternary lithium batteries, while other types of power batteries such as lithium iron phosphate are not affected. Does this mean that batteries such as lithium iron phosphate are safer than ternary material systems?

Kirk doesn't think so. He said that the safety of new energy vehicles and the safety of lithium-ion battery systems depend on many factors including the cathode material system of lithium-ion batteries, not just the cathode material itself. Accidents such as Shenzhen Wuzhoulong vehicle catching fire and Xiamen bus catching fire were not caused by ternary lithium batteries, which shows that the safety of single materials does not represent the safety of power battery systems or vehicles.

Also at the China Electric Vehicle 100 Conference, Ouyang Minggao, a professor at the Department of Automotive Engineering of Tsinghua University, reported the statistical results of China's new energy vehicle safety accidents. The results show that the accident mainly comes from short circuit caused by collision, external short circuit caused by battery water ingress, electrical connection failure, battery overcharge, external short circuit caused by battery leakage and other factors.

Previously, some experts said that the safety problems caused by battery materials only account for 10% of the problems faced by new energy vehicles, while the safety hazards caused by battery management systems are as high as 40%. "In the whole lithium-ion battery, the battery management system is the weakest link and the main reason for safety failure." Sun Yanxian, general manager of Chaowei Chuangyuan Lithium Battery



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