Comparison of production process of benchmark enterprise of lithium battery aluminum plastic film -- Showa of Japan VS DNP of Japan

There are two main types of lithium battery aluminum-plastic film production process at home and abroad: dry process production technology represented by Showa and thermal method production process represented by Japanese DNP. Dry process production technology is researched and developed by Japan Showa and Japan SONY together. Because SONY electrolyte is solid, it does not need aluminum-plastic film electrolyte resistance. Japan Showa uses agents in the dry process. The electrolytic resistance of agents is poor, which to a certain extent, affects the lithium battery service life of aluminum composite membrane. Heat production process is made up by DNP Japan and Japan Nissan to produce automotive batteries and joint develop aluminum-plastic film products. It is superior to Showa in electrolytic resistance.

Japan Fujimori lithium-ion batteries in the production of aluminum-plastic film also adopted the DNP thermal process technology in Japan, Japanese Fujimori began to enter the Chinese market in 2011.But now Japan Fujimori batteries cannot be used for export, the main reason is that technology from DNP Japan, exports will be subject to the conditions of the patent.

The current domestic production of aluminum composite membrane mainly for the production of lithium batteries on digital products, is mainly restricted by technology. The current domestic production of aluminum-plastic film because the research time is shorter, product quality is not stable, so the current domestic lithium battery production enterprises was not used large-scale domestic production of aluminum composite membrane.

1, Showa lithium battery aluminum-plastic film production process

Showa aluminum composite membrane (Showa denko ALF) launched joint development with Japan's Sony company in 1999, 2001, dominated by Showa denko, introduced the second generation of aluminum-plastic film;3 years in mainland China market promotion, Showa denko ALF in at the moment polymer lithium ion batteries in the market occupies an important share of the market.

Showa aluminum composite membrane as the world's largest, most complete line of polymer lithium ion battery materials manufacturers, supply stability in raw material quality and sustainability, R&D technology, etc., has the absolute advantage.

Showa aluminum composite membrane for dry process production, its structure diagram as shown below:

Showa aluminum composite membrane has the advantages of: low cost, fast delivery; Appearance is smooth level off, without trachoma, fold; Deep impact performance is good, can meet the requirements of most of the polymer lithium ion batteries (Showa blunt deep equipment can be matched up to 8 ~ 10 mm);Heat sealing performance; Under the condition of appropriate temperature, pressure, time, Showa aluminum composite membrane sealing strength, sealing, insulation, sealing is far superior to similar products; The electrolyte resistance, Showa aluminum membrane lining for high purity CPP, has good resistance to corrosion of the electrolyte performance. Showa denko aluminum-plastic film is widely used in MP3, mobile phones, tablet PC, PDA, aeromodelling, UPS, electric bicycles and other polymer lithium ion batteries.

2, Japan DNP lithium battery aluminum-plastic film production process

Japan DNP aluminum-plastic film production technology research and development since 2001, with Japan Showa adopts dry process production.

From dry and hot method of two kinds of production process can be seen in the structure diagram, is the main difference between thermal method and dry method, thermal method is used in the process of production the MPP, the MPP is a kind of modified PP, also known as acid PP, MPP has higher thermal joint performance, so in the production of lithium battery aluminum-plastic film aluminum foil layer and the CPP film in between cannot apply adhesives.

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