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A kind of 8021 soft-pack aluminum foil for lithium battery and production method thereof

A production method and technology of lithium batteries, which are applied in the field of aluminum alloys, can solve problems such as poor product quality stability, difficult material manufacturing, lithium battery liquid leakage, etc., achieve good sealing, eliminate segregation of ingot components, and improve grain structure performance effect

Active Publication Date: 2018-08-28
HENAN MINGTAI AL INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulty of material manufacturing and poor product quality stability, 8021 lithium battery soft pack products produced in Japan are currently mainly used in China. Domestic materials have defects such as high strength, low elongation, surface stripes, excessive pinholes, and low cup convexity. Eliminate quality problems such as lithium battery fluid leakage

Method used

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  • A kind of 8021 soft-pack aluminum foil for lithium battery and production method thereof

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Comparison scheme
Effect test

Embodiment 1

[0040] A kind of 8021 soft package aluminum foil for lithium battery, the mass percent of each element in the described aluminum foil is as follows:

[0041] Si is 0.09%, Fe=1.4%, Cu is 0.04%, Mn is 0.04%, Mg is 0.04%, Cr is 0.04%, Zn is 0.03%, Ti=0.02%, and the rest is Al.

Embodiment 2

[0043] A kind of 8021 soft package aluminum foil for lithium battery, the mass percent of each element in the described aluminum foil is as follows:

[0044] Si is 0.08%, Fe=1.45%, Cu is 0.03%, Mn is 0.03%, Mg is 0.04%, Cr is 0.03%, Zn is 0.04%, Ti=0.025%, and the rest is Al.

Embodiment 3

[0046] A kind of 8021 soft package aluminum foil for lithium battery, the mass percent of each element in the described aluminum foil is as follows:

[0047] Si is 0.06%, Fe=1.5%, Cu is 0.02%, Mn is 0.02%, Mg is 0.03%, Cr is 0.02%, Zn is 0.02%, Ti=0.03%, and the rest is Al.

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Abstract

The invention discloses lithium-battery 8021 soft packaging aluminum foil and a production method thereof. Aluminum alloy containing Si, Fe, Cu, Mn, Mg, Cr, Zn, Ti and the balance Al is smelted and subjected to ingot casting, then an ingot is subjected to surface milling and soaking treatment; and the lithium-battery 8021 soft packaging aluminum foil is obtained after the steps of hot rolling, cold rolling, annealing, foil rolling, roll combining, combined roll annealing and roll dividing. The lithium-battery 8021 soft packaging aluminum foil prepared through the good technological process is a finished product in the O state, the ductility reaches 18-20%, the cupping value is larger than or equal to 7 mm, and the fracture resistance, stamping resistance and the like of the soft packaging aluminum foil are effectively improved. The aluminum foil has no holes or pinholes completely, so that a lithium battery soft package prepared from the aluminum foil has good airtightness and is free of liquid leakage and safe to use. The lithium-battery 8021 soft packaging aluminum foil has good social and economical benefits and broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an 8021 soft-wrapped aluminum foil for lithium batteries and a production method thereof. technical background [0002] Aluminum foil has the characteristics of light material, high barrier property, shading, anti-ultraviolet, moisture-proof, anti-corrosion, heat insulation, long shelf life, clean and hygienic, etc. In deep processing and utilization, it has the characteristics of easy bending, excellent adhesion and heat sealing performance, and excellent surface printing performance and decorative effect. Therefore, aluminum foil is an excellent packaging material and has broad application prospects in the packaging industry. Moreover, the one-time consumption of aluminum foil is produced, and the market demand is large. [0003] According to statistics, more than 70% of aluminum foil in Europe is used in various packaging products. In the United States, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/06C22F1/04H01M2/02
CPCC22C1/06C22C21/00C22F1/04H01M50/116Y02E60/10
Inventor 李国锋何延武李发辉
Owner HENAN MINGTAI AL INDUSTRIAL CO LTD
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