How aluminum-plastic film, the raw material for power 2000mah 18650 battery, breaks technical barriers

　　How does aluminum-plastic film, the raw material for power 2000mah 18650 battery, break technical barriers? Lithium battery composite aluminum-plastic film is currently one of the most technically difficult aspects in the field of lithium battery materials. Far more than the separator, positive electrode, negative electrode, and electrolyte. Because of this, it has also become the last place among lithium battery materials that has not yet been truly localized.

　　At present, the performance of my country's lithium battery material aluminum-plastic film products, only a few technical indicators of a few companies can reach the level of Japanese companies. The main problems are electrolyte resistance and penetration depth. The penetration depth of domestic aluminum-plastic film is in About 5mm, Japan and South Korea are at 8mm, or even 15mm. Overall, there is still a certain gap with foreign products.

　　Especially the reaction conditions and precision control. In this high-precision material manufacturing process, the difference is often a thousand miles, and the difficulty of process control is reflected in the millimeter.

　　Domestic aluminum plastic film manufacturers have the following five major difficulties:

　　1) The quality of aluminum foil is poor and the surface treatment process is backward: due to the use of water to wash out oil and "chromic anhydride" passivation treatment, it causes great pollution. At the same time, due to the surface tension of water, the oil in the micropores of the aluminum foil cannot be cleaned, causing defects in subsequent processes;

　　2) The water treatment process of aluminum foil will produce "hydrogen embrittlement", so the domestic aluminum-plastic film has poor tearing resistance;

　　3) The surface of the aluminum foil is coated with a UV layer, the stiffness of the aluminum foil is not enough, it is easy to wrinkle during dry lamination, and the yield of wide-width products is poor;

　　4) For CPP, laminating machines are mainly used in China for laminating. When combined with the surface of aluminum foil with high thermal conductivity, it is easy to curl and produce lamellar crystals;

　　5) Due to domestic adhesive formula technology, the product is prone to delamination and peeling problems.

　　How does aluminum-plastic film, the raw material for power 2000mah 18650 battery, break technical barriers?

　　Aluminum-plastic film is an essential packaging material for flexible packaging 2000mah 18650 battery, which mainly protects the internal cells. Due to the advantages of flexible shape and size, lightweight design, and large specific capacity, soft-pack 2000mah 18650 battery encapsulated by aluminum plastic film are widely used in the field of consumer electronics and new energy vehicles.

　　Aluminum-plastic film is an important material for packaging soft-pack 2000mah 18650 battery and plays a vital role in the quality of soft-pack batteries. As the key link with the highest barriers in the lithium battery industry chain, the global aluminum-plastic film market has been monopolized by a few Japanese companies, accounting for about 70% of the global market share. At present, domestic enterprises have gradually matured after years of accumulation of technology and are gradually realizing large-scale production.

　　There are high technical barriers in the field of aluminum-plastic film. Daoming people must dare to bite hard bones, dare to venture into dangerous shoals, break through the oligopoly of foreign-funded enterprises, continue to explore and innovate, and do not become technical vassals of other countries. Key technologies must be relied on by themselves. Gradually narrow the gap between domestic aluminum-plastic film process stability and stamping resistance and foreign companies. As the demand for aluminum-plastic films continues to strengthen, localization is imperative in the future.

　　With the fierce competition in the lithium battery industry, domestic lithium battery manufacturers are urgently demanding to reduce the cost of lithium battery raw materials. It is the general trend and the inevitable way to replace imported aluminum plastic films with domestic ones.

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