Aluminum alloy strip for battery shell and manufacturing method of aluminum alloy strip

A technology of aluminum alloy strips and battery casings, which is applied in the field of aluminum alloy strips for battery casings and its manufacture, to achieve the effects of eliminating crystal structure, increasing tissue density, and reducing the amount of solid solution

Inactive Publication Date: 2021-01-08
JIANGSU ALCHA ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide an aluminum alloy strip for battery case and its manufacturing method, which can solve the above-mentioned problems existing in the preparation of aluminum alloy strip by the existing continuous casting and rolling process

Method used

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  • Aluminum alloy strip for battery shell and manufacturing method of aluminum alloy strip
  • Aluminum alloy strip for battery shell and manufacturing method of aluminum alloy strip
  • Aluminum alloy strip for battery shell and manufacturing method of aluminum alloy strip

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Embodiment 1

[0029] The invention discloses a method for preparing an aluminum alloy strip for a battery casing:

[0030] (1) Smelting and refining: Fe, Mn, Si, Cu raw materials are put into the smelting furnace according to the weight percentage of Fe 0.55%, Mn 0.95%, Si 0.20%, Cu0.08%, so that the smelting The temperature of the melt is 740-745°C; then it is put into a static furnace and refined at 735-740°C for 18 minutes. , the adding speed is 0.30m / min, and the difference ΔTi of Ti content in launder and static furnace is controlled to be 0.015%;

[0031] By adding Ti in the launder in the form of AlTi5B1 filaments, the amount of Ti addition and burning loss can be precisely controlled, which helps to control the value of ΔTi, thereby ensuring the effective Ti content in the final solidification process and ensuring the subsequent preparation process. Grain refinement effect;

[0032] (2) Continuous casting and rolling: put the above-mentioned smelted and refined alloy into the cont...

Embodiment 2

[0045]The invention discloses a method for preparing an aluminum alloy strip for a battery casing:

[0046] (1) Smelting and refining: the raw materials of Fe, Mn, Si, and Cu are put into the smelting furnace according to the weight percentage of Fe 0.75%, Mn 1.15%, Si 0.40%, and Cu 0.10%, so that the smelting The temperature of the melt is 750-755°C; then it is put into a static furnace and refined at 745-750°C for 16 minutes. During this process, Ti with a mass percentage of 0.042% is added in the form of AlTi5B1 wire , the adding speed is 0.30m / min, and the difference ΔTi of Ti content in launder and static furnace is controlled to be 0.020%;

[0047] By adding Ti in the launder in the form of AlTi5B1 filaments, the amount of Ti addition and burning loss can be precisely controlled, which helps to control the value of ΔTi, thereby ensuring the effective Ti content in the final solidification process and ensuring the subsequent preparation process. Grain refinement effect; ...

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Abstract

The invention discloses an aluminum alloy strip for a battery shell and a manufacturing method of the aluminum alloy strip. The aluminum alloy strip comprises the following components in percentage byweight: 0.55%-0.75% of Fe, 0.20%-0.40% of Si, 0.08%-0.10% of Cu, 0.95%-1.15% of Mn, 0.015%-0.020% of delta Ti and the balance of Al. Delta Ti is the content difference value of Ti in a launder and astanding furnace. The manufacturing method comprises the steps of smelting and refining; continuous casting and rolling; double-stage desolventizing annealing; and cold rolling. The alloy cooling solidification speed in the continuous casting and rolling process is effectively reduced, the solid solution amount of Mn in the alloy is reduced, segregation and unbalanced crystalline structures are eliminated, fine grain structures are formed in the alloy, and the distribution uniformity of alloy elements is improved; and the tensile strength of a finished product of the prepared aluminum alloy strip ranges from 140 MPa to 165 MPa, the yield strength is larger than or equal to 130 MPa, the ductility is larger than or equal to 8%, and the mechanical property is excellent.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy strip, in particular to an aluminum alloy strip for a battery casing and a method for manufacturing the same. Background technique [0002] In recent years, aluminum alloy strips have been widely used in the manufacture of battery cases due to their excellent comprehensive machining performance, good corrosion resistance, light specific gravity, good heat dissipation performance and strong anti-electromagnetic interference performance. Due to the large amount of deformation in the stamping process of the battery case, many stamping processes, complex stamping process, precise mold design, and asymmetrical large-strain deep-drawing deformation; under the premise of ensuring the necessary plasticity, it must also have sufficient strength and Hardness, must also have good corrosion resistance, chemical stability and surface quality. [0003] At present, the Al-Mn series deformed alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03B22D11/00C21D1/26C22F1/04C21D8/02
CPCB22D11/003C21D1/26C21D8/0236C21D8/0268C22C1/026C22C1/03C22C21/00C22F1/04
Inventor 张全成朱振东章建华吴永新俞玥时坚
Owner JIANGSU ALCHA ALUMINUM CO LTD
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