At present, solid-state batteries mainly tend to adopt pouch design, and pouch batteries have great potential for the advantages of lamination process, high energy density and gel packaging technology. As a key material for pouch battery encapsulation, the amount of aluminum-plastic film is expected to increase.
Semi-solid-state and solid-state batteries, as the focus of next-generation battery research and development, have further boosted the demand for aluminum-plastic films. At the same time, with the surge in battery shipments in the field of power batteries and energy storage, the shipments of pouch lithium batteries have also risen rapidly.
According to SPIR, the market demand for aluminum plastic film in China is expected to grow to 1.41 billion square meters by 2025.
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Overview of the aluminum-plastic film industry
Aluminum plastic film is a special packaging material for lithium-ion batteries, which is widely used in pouch batteries and blade batteries, mainly playing the role of protecting internal electrodes and isolating the external environment.
Compared with packaging materials such as steel shell and aluminum shell, it is thinner and more flexible in design, providing effective protection for the battery.
From a structural point of view, the aluminum-plastic film is composed of three layers of composite structure: the outer nylon layer provides protection, the middle aluminum foil layer realizes barrier, and the inner heat-sealing layer ensures that the package is sealed, and these three layers are tightly combined by the adhesive to form a whole.
Aluminum-plastic film product structure:
Source: Battery Alliance.com
The technical difficulty of the production of aluminum-plastic film is mainly reflected in the three major links of raw material selection, production process and equipment manufacturing.
The quality of raw materials has a direct impact on the key performance indicators of aluminum-plastic film, such as depth of punching, electrolyte resistance and service life. In terms of production equipment, the production of aluminum-plastic film requires a variety of high-precision equipment, such as aluminum foil coating machine, dry laminating machine, etc. Core equipment such as coating machines require very high precision, which increases the technical complexity of production.
The production equipment of power aluminum-plastic film is more demanding, usually requiring customized high-precision equipment, and the customization cycle is usually more than 15 months.
Diagram of aluminum-plastic film industry chain:
Source: Die-Cut Coated Family
The competition pattern and leading position in the aluminum-plastic film market
The characteristics of aluminum-plastic film investment are its asset-light operation model, high profit margins and strict requirements for product performance. In addition, the technical content of aluminum-plastic film can bring considerable profits to enterprises.
The technical threshold for the production of aluminum-plastic film in mainland China is relatively high, resulting in a high dependence on imports for a long time.
Originally jointly developed by Japan's Showa Denko and Sony, the global and domestic aluminum plastic film market is mainly controlled by a few foreign companies such as Japan Printing (DNP) and Showa Denko. In recent years, the domestic technology has gradually matured, and mainland aluminum-plastic film enterprises are also actively increasing investment to expand production capacity.
Global market pattern of aluminum-plastic film:
Source: Public collation
In the competitive landscape of the global aluminum-plastic film market, domestic enterprises occupy a total of about 25% of the market share, and the domestic substitution space is very broad.
The production technology of aluminum-plastic film has high barriers, requiring the product to have excellent barrier, punching ability, puncture resistance, and other characteristics, and to ensure the consistency of product performance after mass production, which are all technical problems. Therefore, aluminum-plastic film has become the only core material in the current pouch battery that has not yet been localized on a large scale.
The concentration of the aluminum-plastic film industry in the domestic market is relatively high, which is significantly higher than that of other battery materials. The profit margins of industry leaders are also maintained at a high level, such as the gross profit margin of leading enterprises is stable at about 30%.
At present, domestic suppliers of aluminum-plastic film include Zijiang Enterprise, Putailai, Enjie, Daoming Optics, Mingguan New Materials, Fosu Technology, Huazheng New Materials, Yinglian Shares, Haishun New Materials, etc. #固态电池##铝塑膜##锂电池##新能源汽车##财经#
On the whole, the current domestic aluminum-plastic film is mainly used in the field of low-end consumer electronics. In the field of high-end consumer electronics and power batteries, products still rely on the supply of overseas enterprises. With the continuous acceleration of process innovation and R&D, leading manufacturers are expected to lead the industry to enhance their competitiveness in the global market and accelerate the pace of domestic substitution.
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