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The ternary material power lithium ion battery industrialization project will be built
On the morning of September 4th, 2011, China Automotive Technology and Research Center held a press conference of “Ternary Materials Power Lithium Ion Battery Industrialization Project” during the “2011 China Automotive Industry Development (TEDA) International Forum”. "Ternary Material Power Lithium Ion Battery Industrialization Project" is a joint project established by China Automotive Technology and Research Center and Japan's well-known power lithium-ion battery research and development company, Japan Insine Co., Ltd., and established a joint venture in Shanghai. Energy Co., Ltd., to undertake this industrialization project. Shanghai Ka Nai New Energy Co., Ltd. settled in Jiading Industrial Zone, Shanghai, covering an area of 35,000 square meters with a total investment of 1 billion yuan. After completion, it will reach a capacity of 100 million ampere hours. The new energy automobile industry is a national strategic emerging industry. The key technical difficulty lies in battery technology. At present, the domestic battery technology level has become a bottleneck restricting the development of new energy automobile industry. The successful operation of the "power lithium-ion battery based on ternary materials for the positive electrode" will launch a high-performance ternary material power lithium-ion battery to the domestic market. It is a breakthrough in the power battery technology of the vehicle and will promote The development of the new energy automobile industry. It is understood that the project will be industrialized power lithium-ion battery products have many new features. In terms of materials, the product adopts the internationally advanced material system: the positive electrode is a ternary material, the negative electrode is a mixture of artificial graphite and other advanced negative electrode materials, which improves the comprehensive performance of the product; the laminated soft packaging process is adopted in the structure. The structure has uniform current collection, good heat dissipation, and improved battery rate performance and safety; the product adopts a patented membrane to greatly improve the safety of the battery body, and the single battery and the module have been dropped. After safety evaluation tests such as extrusion, acupuncture, hot box, over-charge and over-discharge, the results fully meet the national standards for battery regulations; based on the application of special diaphragm materials, the liquid retention capacity and porosity of the diaphragm are improved. To reduce the internal resistance of the battery, the product is charged and discharged at a rate of 1 times, and the discharge depth is 80% of DOD. After 3000 cycles, the capacity can still be maintained above 85%. The project will produce a 25Ah power battery with a weight ratio of up to 160Wh/kg. Compared with lithium iron phosphate battery, it is more than 30% higher, which can reduce the weight of the whole vehicle and increase the driving range. In view of the material system mentioned above, the polarization is small and the temperature rise is low under high current charging and discharging current. The battery can sustain 3C charging, 5C discharge (instantaneous 10C) high input and output capacity; reasonable electrolyte ratio and formula, battery discharge temperature range is -20~45°C, charging temperature range is 0~45°C; Using a number of patented manufacturing processes, the powder pretreatment technology ensures the uniformity of powder mixing and slurry mixing; the special chemical conversion process ensures the stability of the battery film formation, thus ensuring the battery batch between Stability, as well as the battery's charge storage performance, greatly improve product consistency. The production equipments are all imported from abroad, and the Japanese employees are responsible for the production and quality management of the products, so that the standard deviation of product capacity is less than 0.08Ah, the matching rate is high, and the system cost is reduced.