Jointly undertaken by Xiamen University and China Aviation Lithium Battery (Luoyang) Co., Ltd., the “Technical Development of Functional Separator for High-Safety Power Battery†project supported by the National High-Tech Research and Development Program (863 Program) has completed an annual output of 3 million square meters The functional diaphragm test line, on this basis, completed the formulation curing, slurry, coating, slitting process technology development, formed production capacity, and carried out ceramic diaphragm battery design, trial production and testing. The implementation of this project is a key link to improve and supplement the lack of China's lithium-ion power battery industry chain, and to improve the safety of the production and application of lithium-ion power batteries.
This project promotes the development of safety functional separators for power lithium-ion batteries, promotes the engineering of related technologies and materials, and develops high-safety lithium ion battery functional separator production technologies to achieve high performance and low cost of functional separator products. The actual application needs are the goal. Using substrate film surface treatment technology and inorganic ceramic powder dispersion technology to optimize the coating effect of ceramic powder, establish the dose-effect relationship between coating thickness, ceramic type, particle size, surface characteristics, etc. and battery performance. The rules of the parameters, the developed diaphragm has both Shutdown function and high heat resistance, and the technical indicators have reached the world advanced level.
At present, the heat-shrinkage rate of polyethylene membrane coated with aluminum oxide of 3μm thickness at 150 degrees Celsius for 2 hours is less than 2%, the performance is better than similar foreign products, and the cost can be controlled at 10 yuan / square meter Application prospects. After the product developed by the project is put into production, it will be widely used in automotive lithium-ion power batteries and lithium-ion batteries for digital products. This will greatly improve the safety of lithium-ion batteries.
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