Japanese lithium battery aluminum plastic film production technology takes advantage

At present, there are two main production processes for lithium battery aluminum plastic films at home and abroad: the dry production process represented by Showa in Japan and the thermal production process represented by DNP in Japan.

The dry process production process was jointly developed by Showa Japan and Sony Japan. Since Sony's electrolyte is solid and does not require the performance of aluminum plasticizer electrolytic fluid, Showa's dry process in Japan uses a follow-up agent. The electrolytic performance of the secondary agent is relatively poor, which affects the service life of the lithium battery aluminum plastic film to a certain extent. The hot production process is an aluminum plastic film product jointly developed by the Japanese DNP and the Japanese Nissan company to produce automobile electric cores., It is superior to the Japanese Showa in terms of electrolytic performance.

Japanese Fujimori lithium battery aluminum plastic film production process also used Japanese DNP thermal technology, in 2011 Japan Fujimori began to enter the Chinese market. However, at present, Fujimori's products can not be used for export core, mainly because of technical plagiarism of Japanese DNP, and export products will be restricted by patents.

At present, the aluminum plastic film produced by domestic companies is mainly used to produce lithium batteries on digital products, which is mainly limited by technology. At present, the aluminum plastic film produced in China has a short development time and the product quality is not stable. Therefore, domestic lithium battery manufacturers do not use domestically produced aluminum plastic film on a large scale.

1, Japan Showa lithium battery aluminum plastic film production process

ShowadenkoALF was jointly developed and launched with Sony Corporation of Japan in 1999. In 2001, it was led by Showa Electric and launched the second-generation aluminum plastic film. Launched in mainland China in 2003, showadenkoALF currently occupies an important market share in the polymer lithium-ion battery market.

As the world's largest and most complete manufacturer of polymer lithium-ion battery materials, Showa Aluminum Plastics has absolute advantages in terms of raw material quality stability, supply continuity, and R&D technology.

The advantages of Showa aluminum plastic film include: low cost, fast supply; Smooth and flat appearance, no trachoma, folds; The impulse depth performance is good, and it can meet the requirements of most polymer lithium ion cores(up to 8 to 10 mm with Showa deep depth equipment); Thermal sealing performance; Under appropriate temperature, pressure, and time conditions, Showa aluminum plastic film sealing strength, sealing insulation, sealing is much better than similar products; Electrolytic performance, Showa aluminum plastic film inner layer is a high-purity CPP, has a good resistance to electrolytic corrosion performance. Showa Electric Aluminum Plastics is widely used in polymer lithium ion batteries such as MP3, mobile phones, tablets, handheld computers,special models, UPS, and electric bicycles.

2, Japanese DNP lithium battery aluminum plastic film production process

The Japanese DNP aluminum plastic film production technology has been developed since 2001 and is produced by dry methods adopted by Showa in Japan.

From the schematic diagram of the structure of the dry method and the heat method, it can be seen that the main difference between the heat method and the dry method is that the heat method uses MPP in the production process, and MPP is a modified PP. Also known as acidic PP, MPP has a high thermal bonding performance, so aluminum foil layer and CPP film can not be applied to the production of lithium battery aluminum plastic film.

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