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Aluminum alloy plate for battery case and manufacturing method thereof

A technology of aluminum alloy plate and battery case, which is applied in the field of aluminum alloy, can solve the problem of high cost and achieve the effect of excellent laser welding

Active Publication Date: 2017-05-10
FURUKAWA SKY ALUMINUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the formation of oxides can be prevented by controlling the atmosphere of the storage place of the formed or processed material, it is expensive, so an aluminum alloy plate that does not need to control the atmosphere and has excellent corrosion resistance after long-term storage

Method used

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  • Aluminum alloy plate for battery case and manufacturing method thereof
  • Aluminum alloy plate for battery case and manufacturing method thereof
  • Aluminum alloy plate for battery case and manufacturing method thereof

Examples

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Embodiment

[0107] Hereinafter, the present invention will be described in more detail based on examples of the present invention and comparative examples. Among them, the conditions other than the scope of the claimed protection are the conditional scope of the conventional method. These examples of the present invention and comparative examples do not limit the technical scope of the present invention.

[0108] Examples 1-16 of the present invention and comparative examples 17-27

[0109] Using aluminum alloys having the compositions shown in Table 1, ingots having a thickness of 550 mm were cast by a semi-continuous casting method. However, the component of less than 0.01% was set to 0.00%. The obtained ingot was subjected to the surface cutting step shown in Table 2, and then subjected to a homogenization treatment step at a temperature of 540° C. and a holding time of 4 hours. Next, the ingot was once cooled to room temperature. Then, after the cooled ingot was subjected to the s...

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Abstract

The present invention provides an aluminum alloy plate for a battery case, which is excellent in laser weldability, formability, and corrosion resistance after long-term storage, and a method for producing the same. The aluminum alloy plate for a battery case is composed of an aluminum alloy, and the aluminum alloy contains Fe: 0.8 to 2.0 mass% (hereinafter referred to as %), Si: 0.03 to 0.20%, Cu: 0 to 1.00%, Ti: 0.004 to 0.050%, Mg and Mn are controlled to be Mg: 0.02% or less and Mn: 0.02 % or less, the remainder is composed of Al and unavoidable impurities, and Al—Fe with a circle-equivalent diameter of 1.0 to 16.0 μm in the metal structure at a depth of at least 5 μm from the surface of the aluminum alloy plate with the final thickness in the thickness direction The average equivalent circle diameter of the intermetallic compound is 1.3 to 1.9 μm, and the coefficient of variation of the equivalent circle diameter is 0.55 or less. 0.30 or less.

Description

technical field [0001] The present invention relates to an aluminum alloy plate having excellent laser weldability, formability, and corrosion resistance after long-term storage, which is suitable as a case for batteries such as lithium ion batteries used in automobiles, mobile phones, digital cameras, and notebook personal computers. And a method capable of producing the excellent aluminum alloy with good yield. In addition, the aluminum alloy plate obtained by the present invention can also be used as a battery cover. Background technique [0002] Lithium-ion secondary batteries often use aluminum materials for both case materials including a cover and a lid. Typically, the cover is manufactured by deep drawing and thinning of an aluminum or aluminum alloy sheet by pressing. The cover is formed by punching or machining an aluminum plate or an aluminum alloy plate into a predetermined shape to be joined to the cover, and is provided with holes or recesses for mounting ter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00B21B3/00B22D11/00B22D11/049B22D11/22C22C21/12C22F1/04H01M2/02H01M2/04C22F1/00H01M50/119H01M50/133
CPCB22D11/00B22D11/049B22D11/22B21B3/00C22C21/00C22C21/12C22F1/00C22F1/04Y02E60/10H01M50/133H01M50/119
Inventor 大菅广岳热田贤铃木义和
Owner FURUKAWA SKY ALUMINUM CORP