Aluminum foil for high-extension high-deep-drawing-power aluminum-plastic film and production process of aluminum foil

Abstract

The invention discloses an aluminum foil for a high-elongation high-deep-drawing power aluminum-plastic film and a production process of the aluminum foil. The aluminum foil for the high-elongation high-deep-drawing power aluminum-plastic film comprises the following raw material alloys in percentage by weight: 0.03-0.12% of Si, 1.0-1.4% of Fe, 0.01-0.03% of Ti, 0.001-0.01% of Cu, 0.003-0.02% of Mn, less than 0.05% of other single aluminum, 0.015% of other aluminum and more than or equal to 98% of Al. The aluminum foil for the power aluminum-plastic film has the advantages of good surface quality, good stability, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, and the product consistency is good, the deep drawability can reach 7.5 mm or above, and the ductility is 20% or above. By systematically improving a casting, hot rolling and cold rolling production process, an aluminum-plastic film aluminum foil rolling process and an annealing process, the aluminum foil for the power aluminum-plastic film has relatively excellent cold stamping forming capacity and good quality stability and consistency, and has important significance in replacing an imported aluminum foil for the power aluminum-plastic film.

Description

Technical field [0001] The present invention relates to the technical field of soft-clad battery packaging, in particular, refers to a production process of aluminum foil with high-profile high-profile power aluminum plastic film. Background technique [0002] Aluminum plastic film is mainly made of a package material for soft bag batteries mainly consisting of nylon / aluminum foil / CPP three-layer substances and composite glue, and the advantages of soft bag battery using aluminum plastic film have significant safety performance, and shape variable. , Save volume, life expectancy, etc., is the current battery material preferred by power. At present, the world's power aluminum plastic film market is basically Japanese and Korean monopoly. The aluminum foil material that truly applies to the dynamic aluminum plastic film is basically imported. As new energy vehicles have accelerated, the demand for soft bag is continuously increased, and the driving force is aluminum The demand ...

AI Technical Summary

Problems solved by technology

[0024] 1. The existing aluminum foil for power aluminum-plastic film uses 8079 alloy plate. Although its control range meets the requirements of the national standard, the control range of the composition is still relatively wide. When the stability is mass-produced, the stability of the product is not easy to guarantee

[0025] 2. The existing aluminum foil for power aluminum-plastic film uses forward grinding during the hot rough rolling process, and the roller brush speed is 300-400rpm. After hot rough rolling, the surface texture of the aluminum foil for aluminum-plastic film is relatively rough, and there are black lines on the surface, which affects product surface quality

[0026] 3. When the existing aluminum foil for power aluminum-plastic film is annealed in the middle of the cold rolling process, the temperature is 400-430°C. Using this temperature is easy to produce iron-containing dirt during the annealing process. The alloy itself of the existing aluminum foil for power aluminum-plastic film High iron content. Under the action of high temperature, part of the iron element is dissolved and precipitated, which affects the surface quality.

[0027] 4. In the existing cutting process, the Lutz blade is passive, and there will be cracks, gaps and burrs in the cutting edge;

[0028] 5. The deep drawing performance of the existing aluminum foil for power aluminum-plastic film can only reach 7.0mm, and the elongation rate can only reach 18%.

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