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Aluminum alloy sheet for electric cell case, having excellent moldability, heat dissipation, and weldability

A technology of aluminum alloy plate and battery casing, which is applied in the directions of large-sized batteries/battery packs, small-sized batteries/battery packs, welding equipment, etc. Deformation recovery, excellent shape freezing effect

Inactive Publication Date: 2014-12-10
NIPPON LIGHT METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Indeed, although the 1000 series has stable weldability and excellent formability, it has the problem of low strength

Method used

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  • Aluminum alloy sheet for electric cell case, having excellent moldability, heat dissipation, and weldability
  • Aluminum alloy sheet for electric cell case, having excellent moldability, heat dissipation, and weldability
  • Aluminum alloy sheet for electric cell case, having excellent moldability, heat dissipation, and weldability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0099] Fabrication of the final board

[0100] Various prescribed ingots were measured and blended, and 6 kg (a total of 8 test materials) ingots were inserted and charged into No. 20 crucibles coated with a release material. These crucibles were inserted into an electric furnace, melted at 780° C. to remove dross, and then the temperature of the melt was kept at 760° C., and then 6 g of fluxes for deslagging were wrapped in aluminum foil and added by extrusion with a phosphorizer.

[0101] Next, insert the spray gun into the melt, put N 2 Gas was blown in at a flow rate of 1.0 L / min for 10 minutes to perform degassing treatment. Then, it was left to rest for 30 minutes, and the dross floating on the surface of the melt was removed with a stirring rod, and the disc sample was taken into a mold for component analysis with a sample spoon.

[0102] Next, the crucibles were sequentially taken out from the electric furnace with a jig, and molten aluminum was cast in a preheated...

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Abstract

Provided is a 3000 series aluminum alloy sheet having heat-dissipating characteristics applicable to large lithium ion cell containers, and also having excellent moldability, shape-freezing properties, and laser weldability. The aluminum alloy sheet is a cold-rolled, annealed material having a component composition of, by mass, 0.05 to less than 0.3% Fe, 0.6 to 1.5% Mn, and 0.05 to 0.6% Si, with the balance being Al and impurities, the impurities being, by mass, less than 0.35% Cu and less than 0.05% Mg; and displaying an IACS electrical conductivity exceeding 45%, a 0.2% proof stress of 40 to less than 60 MPa, and an elongation value of 20% or more. Alternatively, the aluminum alloy sheet may be an as-cold-rolled material displaying an IACS electrical conductivity exceeding 45%, a 0.2% proof stress of 60 to less than 150 MPa, and an elongation value of 3% or more. To further increase the electrical conductivity, one or more of, by mass, 0.001 to 0.5% Co, 0.005 to 0.05% Nb, and 0.005 to 0.05% V may be included.

Description

technical field [0001] The present invention relates to an aluminum alloy plate excellent in formability, heat dissipation and weldability for use in containers for secondary batteries such as lithium ion batteries. Background technique [0002] Al—Mn-based 3000-series alloys are increasingly used as raw materials for manufacturing containers for secondary batteries such as lithium-ion batteries because they are relatively excellent in strength, formability, and laser weldability. After forming into the desired shape, it is sealed by laser welding and used as a container for secondary batteries. Based on the above-mentioned 3000-series alloys and existing 3000-series alloys, an aluminum alloy plate for secondary battery containers with improved strength and formability has been further developed. [0003] For example, Patent Document 1 describes an aluminum alloy plate for a prismatic battery case, which is characterized in that the composition of the aluminum alloy plate h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22F1/04H01M2/02C22F1/00H01M50/119H01M50/131
CPCH01M2/02C22F1/04C22C21/00C22F1/00H01M50/131H01M50/119B23K35/286B23K35/0233Y02E60/10
Inventor 铃木健太大和田安志堀久司水岛一光
Owner NIPPON LIGHT METAL CO LTD
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