Pulse laser welding aluminum alloy material, and battery case
A pulsed laser, battery shell technology, applied in laser welding equipment, battery boxes/jackets, lithium batteries, etc. Changes and other problems, to achieve the effect of preventing the formation of local abnormal parts
Inactive Publication Date: 2013-03-13
KOBE STEEL LTD
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Problems solved by technology
[0016] However, the problem with the pulse laser welding of the A1000 series aluminum material is that the material composition such as impurities in the raw material and the surface condition of the raw material affect the welded fusion width and penetration depth, and the fusion zone is prone to sudden changes.
Therefore if Figure 7 As shown, after a large molten pool is suddenly formed on the welding line, it solidifies to form an abnormal part 22 locally, and discontinuity of the weld part 20 is likely to occur.
Method used
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[0072] Hereinafter, examples and comparative examples of the present invention will be described in comparison. Table 1 below shows the composition of the aluminum materials used in this test. Regarding the viscosity of these test materials, the above-mentioned image 3 The assay device shown was used for assay. In addition, the stomata incidence rate is based on the above Figure 4 Measured as indicated.
[0073] [Table 1]
[0074]
[0075] [Table 2]
[0076]
[0077] In Examples 1 to 7 and Comparative Examples 1 to 7 in Table 1, an aluminum material 10 with a plate thickness of 1 mm is made such as Figure 5 As shown in the perspective view of , the end faces are butted against each other, and the butt joints are welded with a pulsed laser. The circular welded portion 20 formed and solidified by one pulsed laser is continuously overlapped and formed along the welded line as the laser moves. The welding machine uses a pulsed YAG laser, the welding speed is 30 mm / m...
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Abstract
This aims to provide a pulse laser welding aluminum alloy material, which can prevent the occurrence of an abnormal portion, when an A1000-series aluminum material is welded with a pulse laser, so that a satisfactory welded portion can be homogeneously formed, and a battery case. The pulse laser welding aluminum alloy material is made of an A1000-series aluminum material, and has a viscosity of 0.0016 Pas or less in a liquid phase. Alternatively, the pulse laser welding aluminum alloy material has such a porosity generation rate of 1.5 ([mu]m 2 / mm) or less in the pulse-laser welded portion as is numerically defined by dividing the porosity total area ([mu]m 2 ), as indicated by the product of the sectional area and the number of porosities, by the length (mm) of an observation section.
Description
[0001] This application is a divisional application of application number: 200880123084.0, application date: 2008.12.18, and invention title: "Aluminum alloy material and battery case for pulse laser welding". technical field [0002] The invention relates to an aluminum alloy material for pulse laser welding suitable for sealing welding by pulse laser welding and a battery casing manufactured by using the aluminum alloy material through pulse laser welding. Background technique [0003] Conventionally, nickel-hydrogen batteries have been mainly used as fuel cells for automobiles, but in recent years, lithium-ion batteries used in mobile phones and personal computers have been studied due to reasons such as light weight and high operating voltage. [0004] Lithium-ion batteries are constructed so that the battery case including the case and cover can function as an electrode, and aluminum with high conductivity is used as the material for the battery case. In addition, becau...
Claims
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IPC IPC(8): C22C21/00H01M2/02B23K26/21B23K26/32H01M50/119H01M50/159H01M50/169
CPCY02E60/12H01M2/0257H01M10/052H01M2002/0297C22C21/00H01M2/0285Y02E60/10H01M50/131H01M50/169H01M50/159H01M50/119
Inventor 松本刚小林一德笹部诚二
Owner KOBE STEEL LTD