公开(公告)号：US20250112220A1

公开(公告)日：2025-04-03

申请号：US18477108

申请日：2023-09-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Raghavendra Saikrishna Keerthi MANDA ,  Daniel Gerardo GONZALEZ ,  Jeffery Thomas WHITE, JR. ,  Srilakshim KATAR ,  Subrahmanyam GORIPARTI ,  Liang XI

IPC: H01M4/04

Abstract: A method of annealing an exposed metal edge margin of a coated battery electrode strip to relieve stress and reduce wrinkling includes applying a magnetic field through an apertured magnetic shield to the exposed metal edge margins. The magnetic field induces eddy currents that heat the exposed metal edge margins to an annealing temperature, while the magnetic shield blocks the magnetic field near the near the coating to protect it from overheating. An apparatus for annealing an exposed metal edge margin of a coated battery electrode strip includes a source of magnetic field and an apertured magnetic shield. In an alternative embodiment, the apparatus includes a laser is for heating the exposed metal edge margin without overheating the coating.