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公开(公告)号:US11801574B2
公开(公告)日:2023-10-31
申请号:US16811627
申请日:2020-03-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Chih-Chang Chen , Jacob W. Disbro , Robert H. Dietze
IPC: B23K28/02 , B23K33/00 , B23K26/322 , B23K26/244 , H01M10/0525 , H01M50/531 , B23K37/02 , B23K101/36 , B23K103/10
CPC classification number: B23K28/02 , B23K26/244 , B23K26/322 , B23K33/002 , H01M10/0525 , H01M50/531 , B23K37/02 , B23K2101/36 , B23K2103/10
Abstract: Presented are metalworking systems for joining metallic workpieces, methods for forming and welding such workpieces, and lithium-ion battery pouch cells with anodized aluminum tabs joined via knurling and laser welding. A method for laser welding abutting sections of a workpiece or stackup of workpieces includes receiving, via a workpiece support frame, one or more metallic workpieces each with a surface having applied thereto a treatment layer. This treatment layer releases a gas during welding. A metalworking device forms a knurl pattern into the workpiece surface with the treatment layer. The knurl pattern includes a network of channels, such as one or more series of mutually parallel, rectilinear vent channels, designed to exhaust therethrough the gas released from a welded section of the treatment layer. A laser welding device thereafter welds a joint region of the surface(s) of the one or more metallic workpiece with the knurl pattern.
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公开(公告)号:US20210276134A1
公开(公告)日:2021-09-09
申请号:US16811627
申请日:2020-03-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Chih-Chang Chen , Jacob W. Disbro , Robert H. Dietze
IPC: B23K28/02 , B23K33/00 , B23K26/322 , B23K26/244 , H01M2/26 , H01M10/0525
Abstract: Presented are metalworking systems for joining metallic workpieces, methods for forming and welding such workpieces, and lithium-ion battery pouch cells with anodized aluminum tabs joined via knurling and laser welding. A method for laser welding abutting sections of a workpiece or stackup of workpieces includes receiving, via a workpiece support frame, one or more metallic workpieces each with a surface having applied thereto a treatment layer. This treatment layer releases a gas during welding. A metalworking device forms a knurl pattern into the workpiece surface with the treatment layer. The knurl pattern includes a network of channels, such as one or more series of mutually parallel, rectilinear vent channels, designed to exhaust therethrough the gas released from a welded section of the treatment layer. A laser welding device thereafter welds a joint region of the surface(s) of the one or more metallic workpiece with the knurl pattern.
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