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Method for producing 8021 aluminum alloy soft package foil for lithium battery by cast rolling method

An aluminum alloy and lithium battery technology, which is applied in the field of aluminum processing, can solve the problems of poor puncture resistance and stability, poor bonding performance, poor cold stamping formability, etc., to eliminate metal rolling resistance, reduce hydrogen and Oxidized slag content, good sealing effect

Active Publication Date: 2020-06-12
JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing 8021 aluminum alloy soft wrapping foil for lithium batteries and its manufacturing method have the following problems: the existing soft wrapping foil for aluminum-plastic film has low barrier properties, poor cold stamping formability, poor puncture resistance and poor stability, resulting in During the lamination process of aluminum-plastic film, its adhesion and lamination performance is not good, and it is easy to fall off and delaminate; therefore, it is urgent to provide an 8021 aluminum alloy soft wrapping foil for lithium batteries with good folding resistance, stamping resistance and good sealing performance and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for producing 8021 soft-packed aluminum foil for lithium batteries by casting and rolling, the mass percentages of each element in the aluminum foil are as follows: Fe=1.61%, Si0.12%, Cu0.05%, Mn0.05%, Mg0.01 %, Cr<0.05%, Zn<0.05%, Ti0.042%, and the rest is Al.

[0029] The preparation method of the above-mentioned 8021 aluminum alloy soft package foil for the lithium battery comprises the following steps:

[0030] (1) Smelting process: a. Add aluminum ingots into the melting furnace and smelt at 700-760°C. After smelting for 4-6 hours, the aluminum hydration level will be reduced. Calculate and add appropriate amount of various intermediate alloys and / or metal additives, stir and then smelt for 1 to 2 hours, then carry out 2 times of refining. After refining, continue to smelt for 0.5 to 1 hour, and then carry out a particle refining before turning down the furnace, which is complete Smelting operation in the smelting furnace; b. Import the molten aluminum af...

Embodiment 2

[0033] A method for producing 8021 soft-packed aluminum foil for lithium batteries by casting and rolling, wherein the mass percentages of each chemical component in the melt after smelting are: the mass percentages of each element in the aluminum foil are as follows: Fe1.56%, Si0.15 %, Cu0.05%, Mn0.03%, Mg0.01%, Cr3 / h, the hydrogen content of the front box aluminum liquid is 0.11mL / (100g*Al), the temperature of the front box aluminum liquid is 693°C, the size of the roll gap is 5.28mm, the casting and rolling area is 52mm, and the production speed is 750mm / min. The thickness of the slab is 7.0mm; the homogenization and annealing process of the casting and rolling slab: the material temperature is 500°C, and the holding time is 8h. All the other are the same as example 1. The tensile strength of the final 8021 soft wrapping foil material is 110Mpa, the elongation reaches 20%, the cupping value is 8.1mm, and the pinhole rate is 0 / m 2 .

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Abstract

The invention relates to a method for producing 8021 aluminum alloy soft package foil for a lithium battery through a cast rolling method, and belongs to the field of aluminum processing. The method comprises the steps of smelting, cast rolling of a strip billet, cast rolling coil annealing, cold rolling, intermediate annealing, foil rolling, finished product annealing, coil separation, inspection, packaging and warehousing; the cast-rolled strip billet is formed by smelting an aluminum alloy melt according to chemical components of 8021 aluminum alloy and then cast-rolling the aluminum alloymelt into a metal strip billet; and the temperature of a front box is 680-700 DEG C, the liquid level height of the front box is 150-240 mm, the cast rolling speed is 0.65-0.85 m / min, and the thickness of a plate blank is 5.5-7.5 mm. The 8021 alloy aluminum foil blank produced through the cast rolling method has good metallurgical performance and machining structure performance, the production cycle of the cast rolling method is shorter than that of a hot rolling method, energy is saved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of aluminum material processing, and in particular relates to a method for producing 8021 aluminum alloy soft wrapping foil for lithium batteries by casting and rolling. Background technique [0002] Aluminum alloy soft wrapping foil is one of the key materials for lithium batteries. Aluminum alloy soft wrapping foil for 8021 batteries has the characteristics of high plasticity, good corrosion resistance, good electrical conductivity and thermal conductivity, good formability and certain strength. Widely used in the electronics industry. However, the existing 8021 aluminum alloy soft wrapping foil for lithium batteries and its manufacturing method have the following problems: the existing soft wrapping foil for aluminum-plastic film has low barrier properties, poor cold stamping formability, poor puncture resistance and poor stability, resulting in During the lamination process of aluminum-plastic film, its adhesion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/06C22C1/02C22F1/04
CPCC22C21/00C22C1/026C22C1/06C22F1/04
Inventor 左源董则防符豪万宝伟陈建华王雪云王毓玮殷文奇
Owner JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
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