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Battery tab joint by reaction metallurgy

A metal alloy, joint surface technology, applied in the direction of welding/welding/cutting items, welding equipment, non-electric welding equipment, etc., can solve the problems of deterioration of surrounding materials or joints, increased cost, etc.

Active Publication Date: 2012-01-11
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of solder with fluxes, especially for aluminum, can lead to the formation of corrosive flux residues that, if not removed by cleaning operations, can degrade surrounding materials or joints over time
These operations add cost and in some cases are not possible depending on the assembly sequence

Method used

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  • Battery tab joint by reaction metallurgy
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  • Battery tab joint by reaction metallurgy

Examples

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Embodiment Construction

[0075] The invention relates to a solid-state welding process for joining metal or metal alloy workpieces. A reaction product including a flowing low melting temperature liquid-containing material is temporarily formed between the joining surfaces. The flow material is formed as a reaction product between the surface to be joined and a pre-set material that is specifically selected for its ability to react with the base metal alloy. Under the action of the applied force, the reaction product is removed from the joint and leaves a clean oxide-free aluminum or copper surface. The clean oxide-free aluminum or copper surface is formed under continued pressure Metal to metal bond. This process can be implemented to manage the consumption and deformation of the facing surface of the workpiece.

[0076] In many embodiments of the present invention, this process can be used to form a solid welding interface between a copper metal or alloy or aluminum metal or alloy workpiece and anothe...

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Abstract

The invention relates to a battery tab joint by reaction metallurgy. Concretely, copper metal or metal alloy workpieces and / or aluminum metal or metal alloy workpieces are joined in a solid state weld by use of a reactive material placed, in a suitable form, at the joining surfaces. Joining surfaces of the workpieces are pressed against the interposed reactive material and heated. The reactive material alloys or reacts with the workpiece surfaces consuming some of the surface material in forming a liquid-containing reaction product comprising a low melting liquid that removes oxide films and other surface impediments to a welded bond across the interface. Further pressure is applied to expel the reaction product and to join the workpiece surfaces in a solid state weld bond.

Description

[0001] Cross references to related applications [0002] This application relates to US Application No. 12 / 420,927 entitled "Welding Light Metal Workpieces by Reaction Metallurgy" filed on April 9, 2009, which is hereby incorporated by reference. Technical field [0003] The present invention generally relates to a welding process, and more particularly to a solid-state welding process for joining workpieces of metals or metal alloys such as aluminum metal or alloy or copper metal or alloy. Background technique [0004] The joining of metals such as aluminum alloys or copper alloys is complicated by the presence of rapidly forming oxide layers and their inherently high electrical and thermal conductivity. Spot welding can be difficult and requires preparation of the workpiece surface, high current, high force, and mechanically aligned and stable electrodes. Due to the reaction between the aluminum workpiece alloy and the copper electrode or the welding of the copper workpiece alloy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/00
CPCB23K2203/10B23K2203/12B23K20/021B23K20/16B23K2103/10B23K2103/12Y10T428/12736Y10T428/12903
Inventor D.R.西勒J.G.施罗特
Owner GM GLOBAL TECH OPERATIONS LLC
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