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Beam welding of a multi-sheet work stack with a single common welding interface

A technology of stacking structure and welding interface, which is applied in the direction of welding/welding/cutting items, electron beam welding equipment, structural parts, etc., and can solve problems such as non-optimal fusion welding

Active Publication Date: 2012-09-26
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, energy beam welding of workpiece stacks with three or more layers of panels, especially when the various panels are constructed of dissimilar materials, can result in suboptimal fusion welding

Method used

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  • Beam welding of a multi-sheet work stack with a single common welding interface
  • Beam welding of a multi-sheet work stack with a single common welding interface
  • Beam welding of a multi-sheet work stack with a single common welding interface

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Embodiment Construction

[0017] Referring to the drawings, wherein like reference numerals indicate like parts, in figure 1 The welded assembly 10 is shown in as an exemplary battery module of the type that may be used in automotive, industrial, domestic or various other applications. Other multi-piece assemblies constructed with multiple sheet stacks or workpiece stacks, i.e. three or more layers, can be formed via this method, figure 1 The battery modules are used for illustration purposes only.

[0018] An exemplary battery module may be configured as a rechargeable Li-ion polymer battery, but is not limited to such a design. In one embodiment, the battery module may be configured to provide a voltage output sufficient to power one or more traction motors on a hybrid electric vehicle (HEV), electric vehicle (EV), extended-range electric vehicle (EREV), etc. (not shown) provides electrical power, eg, about 300 to 400 VDC or higher, depending on the application. Such levels are typical for electri...

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PUM

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Abstract

A method for beam welding a multi-sheet work stack includes positioning a first sheet adjacent to a second sheet, and positioning a third sheet adjacent to the second sheet such that a single common welding interface is defined. An energy beam is directed onto the interface until a fusion weld forms along the interface. The third sheet may define a flange or a tab portion. The flange portion may be placed in direct contact with the first sheet along the interface, while the tab portion may be inserted into a slot of the second sheet to contact the first sheet at the interface. The beam may be a laser or ion beam. The lower melting temperature sheet may be positioned farther from the source of the energy beam than the other sheets. The welded assembly may be a battery module, with the sheets being an interconnect member and battery tabs.

Description

technical field [0001] The present invention relates to the energy beam welding of multi-layer workpiece stacks, ie workpiece stacks having three or more layers of panels, and to assemblies constructed in accordance with this method. Background technique [0002] Laser welding is a widely used commercial process in which a laser beam illuminates a targeted area of ​​a workpiece stack. Electron beams can be used in a similar manner. The irradiated material becomes liquefied due to the intensity of the laser beam. A weld joint or seam is formed as the liquefied material cools. Energy beam welding may be used to form a fusion weld completely through the thickness of a pair of adjacent panels in a typical workpiece stack having two layers of panels. However, energy beam welding of workpiece stacks having three or more layers of panels, especially when the various panels are constructed of dissimilar materials, can result in suboptimal fusion welding. Contents of the inventi...

Claims

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Application Information

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IPC IPC(8): B23K26/20B23K13/00B23K28/00H01M50/531
CPCB23K13/00Y02E60/12B23K2203/12H01M2/22H01M2/26B23K28/00B23K26/3213B23K2203/10B23K26/20H01M2/20B23K15/0046B23K2201/36B23K26/24B23K26/32B23K2101/36B23K2103/08B23K2103/10B23K2103/12Y10T29/49108Y02E60/10H01M50/528H01M50/531
Inventor W.W.蔡T.B.斯托顿X.赵
Owner GM GLOBAL TECH OPERATIONS LLC