公开(公告)号：US20220328938A1

公开(公告)日：2022-10-13

申请号：US17228868

申请日：2021-04-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chih-chang Chen ,  Teresa J. Rinker ,  Hongliang Wang ,  Eric G. Hartnagle

IPC: H01M50/536 ,  B23K20/10 ,  B23K26/24 ,  B23K26/70

Abstract: A method and associated device for joining a battery cell tab to a plurality of foils associated with a plurality of electrodes of a battery cell are described. This includes arranging the plurality of foils in a stack, and joining, via a first joining device, the plurality of foils, wherein the first joining device defines a joining region. A portion of the battery cell tab is arranged on the plurality of foils, and joined, via a second joining device, to the plurality of foils. The second joining device generates a weld joint that is encompassed within the joining region defined by the first joining device. In doing so, weld quality and strength of internal welds in a battery cell may be improved by reducing the occurrence of porosities and cracks in the foil/tab weld joints.

公开(公告)号：US11710879B2

公开(公告)日：2023-07-25

申请号：US17228868

申请日：2021-04-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chih-chang Chen ,  Teresa J. Rinker ,  Hongliang Wang ,  Eric G. Hartnagle

IPC: B23K20/00 ,  H01M50/536 ,  B23K20/10 ,  B23K26/70 ,  B23K26/24 ,  B23K101/36

CPC classification number: H01M50/536 ,  B23K20/10 ,  B23K26/24 ,  B23K26/702 ,  B23K2101/36

Abstract: A method and associated device for joining a battery cell tab to a plurality of foils associated with a plurality of electrodes of a battery cell are described. This includes arranging the plurality of foils in a stack, and joining, via a first joining device, the plurality of foils, wherein the first joining device defines a joining region. A portion of the battery cell tab is arranged on the plurality of foils, and joined, via a second joining device, to the plurality of foils. The second joining device generates a weld joint that is encompassed within the joining region defined by the first joining device. In doing so, weld quality and strength of internal welds in a battery cell may be improved by reducing the occurrence of porosities and cracks in the foil/tab weld joints.

公开(公告)号：US10249857B2

公开(公告)日：2019-04-02

申请号：US15466363

申请日：2017-03-22

Applicant: GM Global Technology Operations LLC

Inventor： Steven Daniel Lorentz ,  Chih-chang Chen ,  Wayne W. Cai ,  Nikolay Kondratyev ,  Roger M. Brisbane

IPC: H01M2/10 ,  H01M2/20 ,  B23K26/21 ,  B23K101/00

Abstract: A battery assembly includes a plurality of battery cells each including a cell tab and a bus bar connected to the cell tabs of adjacent battery cells. The bus bar including a pair of 180 degree bend regions that each define a channel for receiving a respective cell tab and a cut-out region defining an opening having opposing edge portions that allows direct access to the cell tab within the cut-out region. A weld line connects the cell tab to at least one of the opposing edge portions within the cut-out region.