Laser welding technology of automobile power battery aluminum alloy shell

A technology for automobile power battery and aluminum alloy shell, which is applied in the field of laser welding technology of automobile power battery aluminum alloy shell, can solve the problems of low production efficiency, large linear expansion coefficient, increased heat input, etc., and achieves cost saving and tensile strength. Good, increase the effect of welding aspect ratio
CN105033385AInactive Publication Date: 2015-11-11SOUTH CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA NORMAL UNIVERSITY
Publication Date
2015-11-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a laser welding technology of an automobile power battery aluminum alloy shell. According to the technology, under the protection of inert gases, a welding line of aluminum alloy is welded in a laser brazing manner. The pulse width of the laser ranges from 3 ms to 7 ms. A preheating stage, a heating stage and an insulating stage are included in the pulse range, wherein the preheating stage is not smaller than 1 ms, the heating stage is not smaller than 1 ms, and the insulating stage is not smaller than 1 ms. The power of the preheating stage and the power of the insulating stage range from 3 kw to 4 kw. The power of the heating stage is increased and then reduced, and the peak power ranges from 6 kw to 8.5 kw. The laser welding technology of the automobile power battery aluminum alloy shell is superior in tensile performance.
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Description

technical field

[0001] The invention relates to the field of manufacturing automobile power battery casings, in particular to a laser welding process for the aluminum alloy casing of automobile power batteries. Background technique

[0002] The invention relates to a laser welding waveform of an industrial pure aluminum shell of an automobile lithium ion battery, belonging to the field of automobile power battery manufacturing.

[0003] Lithium-ion batteries have attracted much attention due to their high specific energy, low self-discharge, long cycle life, no memory effect and environmental protection. The development momentum of lithium-ion batteries is extremely rapid. Lithium-ion batteries have been used in notebook computers, mobile phones, VCRs, small medical equipment, motorcycles, bicycles, cameras, and other fields, the application research of lithium-ion batteries in electric vehicles, aviation, aerospace, navigation, and military fields is also being actively car...

Claims

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