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Aluminum alloy plate for battery box and manufacturing method thereof

A technology of aluminum alloy plate and manufacturing method, which is applied in the direction of metal rolling, can solve the problems of battery box pressure resistance drop, easy expansion, deformation, etc., and achieve the effect of excellent strength and high productivity

Inactive Publication Date: 2009-09-23
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when reducing the thickness of the existing aluminum alloy plate made of JISA3003 alloy or the like, there is a problem that deformation is likely to occur, and the pressure resistance of the battery box is lowered, and expansion is likely to occur even under the action of a small internal pressure.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1～12、 comparative example 16～29

[0053] Aluminum alloys having the compositions shown in Table 1 were melt-cast to form ingots, and the ingots were soaked at 550° C. for 4 hours. The homogenized ingot is hot-rolled and then cold-rolled to form a rolled sheet having a thickness of approximately 0.7 mm. Then, the rolled sheet was heated at 500° C. / min to 520° C., held at this temperature for 30 seconds, and then cooled at 500° C. / min. to perform intermediate annealing. Finally, final cold rolling was performed at a rolling reduction of 30% to obtain an aluminum alloy plate with a plate thickness of 0.5 mm.

Embodiment 13～15、 comparative example 30～36

[0055] An aluminum alloy having the composition shown in Table 2 (the same composition as in Example 1) was melt-cast to form an ingot, and the ingot was soaked at the temperature shown in Table 2 for 4 hours. The homogenized ingot is hot-rolled and then cold-rolled to form a rolled sheet having a predetermined thickness. Further, intermediate annealing was performed on the rolled sheet at the heating rate, annealing temperature (holding for 30 seconds) and cooling rate shown in Table 2. Finally, the final cold rolling was performed at the rolling reduction shown in Table 2 to obtain an aluminum alloy plate with a plate thickness of 0.5 mm. In addition, the specifications and evaluation results of Example 1 are also described in Table 2.

[0056] (Cu solid solution)

[0057] The solid solution amount of Cu in the Al parent phase of the obtained aluminum alloy plate was measured using the hot phenol residue extraction method. A predetermined amount of aluminum alloy plate wa...

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Abstract

The present invention provides an aluminum alloy plate for a secondary battery box with an excellent strength, compressional resistance and stress retentivity resistance even through implementing a thin wall treatment, the aluminum alloy plate is composed of aluminum alloy containing Mn: more than 0.4 mass percent and less than 1.5 mass percent, Cu: more than 1.0 mass percent and less than 4.0 mass percent apart from 1.0 mass percent, Mg: more than 0.2 mass percent and less than 1.2 mass percent, Si: more than 0.05 mass percent and less than 0.5 mass percent, Fe: more than 0.05 mass percent and less than 0.60 mass percent, Zn is less than 0.10 mass percent, the remain contains Al and unavoidable impurity, and a rate of Cu relative to a fixed dissolving amount of the Cu content to Al parent phase is more than 0.8.

Description

technical field [0001] The present invention relates to an aluminum alloy plate suitable for battery boxes such as lithium ion secondary battery boxes and a method for manufacturing the aluminum alloy plate. Background technique [0002] Lithium-ion secondary batteries are widely used as power sources for mobile phones, notebook computers, and the like. In the material of the case (hereinafter referred to as the battery case) for the exterior of the secondary battery, aluminum such as JISA3003 alloy has been used conventionally in order to satisfy the miniaturization and weight reduction of the battery, and to form the workability of the battery case. alloy. In such a battery, the internal pressure of the battery case rises during charging and discharging. In addition, when electronic equipment equipped with batteries is placed in a high-temperature environment in a motor vehicle in summer, the battery box itself also rises from 60°C to 90°C. Due to the temperature rise, n...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/06C22C21/12C22C1/02C22F1/04C22F1/047C22F1/057C21D1/26C21D8/00
CPCY02E60/12B21B3/00C22C21/12C22F1/057
Inventor 小林一德
Owner KOBE STEEL LTD