Aluminum alloy strip applied to new energy power battery shells and preparation method thereof

A technology for power batteries and aluminum alloy strips, which is applied in the field of aluminum alloy strips for new energy power battery shells and its preparation, can solve problems such as high ear-making rate, poor laser welding performance, and poor deep drawing performance, and is easy to promote , the effect of improving performance

Active Publication Date: 2016-11-16
CHINALCO RUIMIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the material cannot fully meet the product requirements, and has defects such as poor deep drawing performance, high ear making rate, and poor laser welding performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An aluminum alloy strip for a new energy power battery case, the composition of which is: Si 0.1wt%, Fe 0.7wt%, Cu0.06wt%, Mn 1.2wt%, Mg 0.04wt%, Ti 0.01wt%, the balance for Al.

[0021] A method for preparing the above-mentioned aluminum alloy strip for new energy power battery case, the specific steps are:

[0022] (1) According to the composition of the aluminum alloy strip, the aluminum alloy raw material is semi-continuously cast into an aluminum alloy flat ingot after smelting, refining, online deslagging and degassing;

[0023] (2) After the flat ingot is sawed and face milled, it is heated to 580°C for 10 hours to perform homogenization heat treatment;

[0024] (3) Then it is hot rolled out of the furnace, the thickness of hot rolling is 2.0mm, and the finishing temperature of hot rolling is 360°C;

[0025] (4) Roll the hot-rolled plate to a certain thickness on the cold rolling mill, and reserve 15% of the cold-rolled processing rate of the finished product; ...

Embodiment 2

[0031] An aluminum alloy strip for a new energy power battery case, the composition of which is: Si 0.4wt%, Fe 0.4wt%, Cu0.14wt%, Mn 1.0wt%, Mg 0.03wt%, Ti 0.03wt%, the balance for Al.

[0032] A method for preparing the above-mentioned aluminum alloy strip for new energy power battery case, the specific steps are:

[0033] (1) According to the composition of the aluminum alloy strip, the aluminum alloy raw material is semi-continuously cast into a flat ingot after melting, refining, online deslagging and degassing;

[0034] (2) After the flat ingot is sawed and milled, it is heated to 600°C for 4 hours, and then homogenized heat treatment is carried out;

[0035] (3) Then it is hot rolled out of the furnace, the thickness of the hot rolling is 8.0mm, and the finishing temperature of the hot rolling is 280°C;

[0036] (4) Roll the hot-rolled plate to a certain thickness on the cold rolling mill, and reserve 25% of the cold-rolled processing rate of the finished product;

[...

Embodiment 3

[0042] An aluminum alloy strip for a new energy power battery case, the composition of which is: Si 0.2wt%, Fe 0.6wt%, Cu0.08wt%, Mn 1.1wt%, Mg 0.02wt%, Ti 0.02wt%, the balance for Al.

[0043] A method for preparing the above-mentioned aluminum alloy strip for new energy power battery case, the specific steps are:

[0044] (1) According to the composition of the aluminum alloy strip, the aluminum alloy raw material is semi-continuously cast into an aluminum alloy flat ingot after smelting, refining, online deslagging and degassing;

[0045] (2) After the flat ingot is sawed and milled, it is kept at 590°C for 8 hours for homogenization heat treatment;

[0046] (3) Then it is hot rolled out of the furnace, the thickness of hot rolling is 5.0mm, and the finishing temperature of hot rolling is 320°C;

[0047] (4) Roll the hot-rolled plate to a certain thickness on the cold rolling mill, and reserve 40% of the cold-rolled processing rate of the finished product;

[0048] (5) P...

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Abstract

The invention belongs to the field of preparation of aluminum alloy strips and particularly relates to an aluminum alloy strip applied to new energy power battery shells and a preparation method thereof. The aluminum alloy strip comprises the following components: 0.1-0.4wt% of Si, 0.4-0.7wt% of Fe, 0.06-0.14wt% of Cu, 1.0-1.2wt% of Mn, smaller than 0.05wt% of Mg, 0.01-0.03wt% of Ti and the balance of Al. Through the aluminum alloy strip, the components of the aluminum alloy strip are optimized on the basis of 3003 alloys; through reasonable distribution of homogenization heat treatment, a hot rolling process, an annealing process and a cold rolling process, the aluminum alloy strip can meet high deep drawing performance and can achieve effective laser welding with a cover plate. The preparation method of the aluminum alloy strip is economical and is easy to popularize.

Description

technical field [0001] The invention belongs to the field of preparation of aluminum alloy strips, and in particular relates to an aluminum alloy strip for new energy power battery shells and a preparation method thereof. Background technique [0002] The punching process of the new energy power battery case has a large amount of deformation, many punching passes, and a complicated production process, which puts forward high requirements on the comprehensive performance of the material, especially the deep drawing performance and laser welding performance, and not only requires the material to have a small thickness Deviation, good surface quality, good plasticity, small yield ratio, low lug rate and excellent laser welding performance are also required to ensure the safety of the battery during service. At present, this material cannot fully meet the product requirements, and has defects such as poor deep drawing performance, high ear making rate, and poor laser welding p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22F1/04
CPCC22C21/00C22F1/04
Inventor 阙石生乔建博黄瑞银罗筱雄廖明顺
Owner CHINALCO RUIMIN
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