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.

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.