公开(公告)号：US12136747B2

公开(公告)日：2024-11-05

申请号：US17868887

申请日：2022-07-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Wayne W. Cai ,  Thomas Alumoottil ,  Jennifer T. Bracey ,  Teresa J. Rinker ,  Cammi L. Siu

IPC: H01M50/536 ,  B23K20/10 ,  B23K101/36

Abstract: A method for manufacturing a battery cell having electrode foils protruding from a cell pouch includes positioning the cell pouch in a fixture such that distal end sections of the foils extend outward from the fixture. The method includes clamping the distal end sections in a curvilinear guide clamp to cause the distal end sections to taper into an electrode foil stack, and then translating the clamp a predetermined distance toward the fixture to displace the distal end sections by the predetermined distance. The method also includes trimming the distal end sections using a trim tool, positioning a sonotrode and an anvil adjacent opposite surfaces of the stack, and ultrasonically welding the stack to a conductive lead tab using the sonotrode to thereby form a welded joint within the battery cell. The sonotrode may be multi-sided with different knurl patterns for performing different welding processes.

公开(公告)号：US20240030564A1

公开(公告)日：2024-01-25

申请号：US17868887

申请日：2022-07-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Wayne W. Cai ,  Thomas Alumoottil ,  Jennifer T. Bracey ,  Teresa J. Rinker ,  Cammi L. Siu

IPC: H01M50/536 ,  B23K20/10

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

Abstract: A method for manufacturing a battery cell having electrode foils protruding from a cell pouch includes positioning the cell pouch in a fixture such that distal end sections of the foils extend outward from the fixture. The method includes clamping the distal end sections in a curvilinear guide clamp to cause the distal end sections to taper into an electrode foil stack, and then translating the clamp a predetermined distance toward the fixture to displace the distal end sections by the predetermined distance. The method also includes trimming the distal end sections using a trim tool, positioning a sonotrode and an anvil adjacent opposite surfaces of the stack, and ultrasonically welding the stack to a conductive lead tab using the sonotrode to thereby form a welded joint within the battery cell. The sonotrode may be multi-sided with different knurl patterns for performing different welding processes.