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Aluminum alloy for preparing battery shell

A battery shell and aluminum alloy technology, which is applied to battery pack parts, circuits, electrical components, etc., can solve the problems of laser welding prone to trachoma, high air leakage quality defect rate, easy shell expansion, etc., to reduce shell The effect of reducing mouth and surface deformation, reducing the welding defect rate, and increasing the internal space of the shell

Active Publication Date: 2010-02-17
ZHENGZHOU BAK BATTERY CO LTD
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Problems solved by technology

[0005] Because the aluminum alloy itself is relatively soft, the following problems are prone to occur in the process of shell processing and battery production: 1. The elongation rate is too large, about 6%, which causes the shell to be stretched during the thin-walled shell process. 2. It is easy to cause deformation of the shell mouth and plane after being impacted or squeezed by external force during packaging and transportation; 3. Laser welding is prone to blisters, and the rate of air leakage is high. , if pressure or gas is generated inside the cell, the shell is prone to expansion, which will lead to the degradation or scrapping of the cell, resulting in large economic losses

Method used

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  • Aluminum alloy for preparing battery shell
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Embodiment Construction

[0019] Hereinafter, the present invention will be described in detail with reference to examples, but these examples should not be construed in any way to limit the scope of the present invention.

[0020] As shown in the following table 1, it is based on weight percentage, the aluminum alloy made of the alloy composition of the present invention is compared with A3003P-H14 in different examples, wherein the embodiments (1-15) are the material compositions of the present invention, and the comparative example ( 16) is the material composition of A3003P-H14.

[0021] Table 2 shows the mechanical properties of the aluminum alloy in Table 1. It can be seen from Table 2 that the tensile strength and yield strength of 1-15 are significantly better than A3003P-H14, and the elongation is more than 50% lower than that of A3003P-H14 aluminum alloy.

[0022] Table 1 is the chemical composition of the experimental aluminum alloy in weight percentage, and the balance is aluminum and impur...

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Abstract

The invention relates to an aluminum alloy for manufacturing cell shell, which is composed of the following components in weight percentage: 0.1%<Si<0.3%, 0.2%<Fe<0.55%, 0.12%<Cu<1.0%, 0.25%< Mg<0.6%,0.5%<Mn<2%, 0.05%<Zr<0.3% and 0.05<=Ti<=0.1, and other elements are 0.05% at most for each and 0.15% at most for all and the rest element is aluminum. The invention provides an aluminum alloy for manufacturing cell shell with high tensile strength, high yield strength and low elongation percentage.

Description

【Technical field】 [0001] The invention relates to a novel material aluminum alloy, in particular to an aluminum alloy used for manufacturing battery case materials. 【technical background】 [0002] With the development of electronic technology, the demand for mobile power sources with high specific energy has intensified. Because lithium-ion batteries have the advantages of small size, light weight, high voltage, high capacity, long cycle life, good safety performance, high discharge voltage, and large specific energy, they are widely used in mobile phones, digital cameras, notebook computers, etc. Among the product electronic devices, in recent years, the scope of application has been gradually expanded to many fields such as electric vehicles, space technology, and national defense industry. With the continuous upgrading of high-end electronic products, the electronic machine is gradually developing towards short, small, light, thin and other trends, and under the general ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00H01M2/02H01M50/119H01M50/131
CPCY02E60/10
Inventor 吴抗叶丽华潘启明
Owner ZHENGZHOU BAK BATTERY CO LTD
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