With three layers of composite diaphragm leveraging the lithium battery market

Driven by the downstream new energy automobile industry, the global lithium ion battery diaphragm industry develops rapidly. But China's diaphragm market in the low-end areas of concentrated development, three diaphragm products rely on a small number of American and Japanese manufacturers supply. Benji material danit sees this market opportunity, makes use of the advantages of material research and preparation technology, develops the three-layer composite diaphragm product, and launches the differentiation competition with domestic diaphragm enterprises.

Based on the research and development of materials to force the diaphragm industry

As the company is optimistic about the development prospect of lithium battery membrane and aluminum plastic film industry, benji materials, the world's fourth largest polarizer manufacturer specializing in the material discipline, has been actively engaged in the research and development of lithium battery materials. Until recently, it has fully owned benji material danit.

From danit is born, it has unique advantages of benq materials, with the parent company of polymer processing, film extruding, volume of rolling process, the precision coating such as the core technology as the foundation, combined with strict factory management standards, integrated technology, material, process and control, after several years hard research and development, successfully developed a three-layer composite membrane with high technical content (PP/PE/PP) products.

According to su yandeng, director of product technology department of benji materials co., LTD., the technical difficulty of PP, PE and PB three-layer composite diaphragm is very large, and this technology has not been successfully developed in China.

At present, benq material danit three layer composite film products have passed the domestic and foreign key cell factory verification and started mass production, and continue to promote to the Japanese market. The product has the characteristics of low temperature closed-hole and wide blocking temperature range, and can meet the requirements of no fire and no explosion during overcharge test, with high safety performance. Compared with other diaphragm products, the product has certain advantages in strength and air permeability of empty hole.

In addition to the three-layer composite membrane products, the lithium battery material products developed by bennit also include single-layer membrane (PP), ceramic coating film and aluminum plastic film. Through independent formula design and process technology, the ceramic coating can not only meet the needs of domestic battery factories, but also continuously develop low moisture content products to reach the level required by Japanese first-class battery factories. The regular products of aluminum plastic film have also reached the level of Japanese and Korean large factories through customer verification.

Differentiation to avoid low price competition

According to the plan of China's new energy automobile industry, China's new energy automobile production will reach 5 million in total by 2020. Based on this, the demand for power batteries will reach 200G watt-hours, and the demand for diaphragm will be about 1.5 billion to 2 billion square meters. The development space of the market segment brought by the new energy automobile industry is undoubtedly huge, but the key to seize this market is to provide high-end quality products.

Su yan lamp said, benq material danit composite three-layer diaphragm safety than the current market dry, wet process of the diaphragm is higher, at the same time the cost of wet process diaphragm is lower. Therefore, in terms of the cost performance of the product, the bench-based material danit three-layer composite diaphragm has a greater competitive advantage in the market.

Based on the firm confidence in the products, in 2016 benq material danit invested in two production lines of three-layer composite diaphragm, with an annual production capacity of 80 million square meters. According to the plan, the production capacity of benq material danit three-layer composite diaphragm will reach 100 million square meters in 2018 and 400 million square meters in 2020, ranking among the top 10 diaphragm enterprises in the world.

Benq material danit hopes that the three-layer composite diaphragm technology can be widely used in China, so that the domestic cell factory can be used in high safety, high quality diaphragm products. At present, the benq material danit also in the existing technical process to do further research and development. Benq material danit believes that only by continuously improving the quality of products and competing with the same industry in a differentiated way, it can finally go longer and longer in the industry.

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