公开(公告)号：US20250129811A1

公开(公告)日：2025-04-24

申请号：US18493722

申请日：2023-10-24

Applicant: GM Global Technology Operations LLC

Inventor： Ying Lu ,  Junjie Ma ,  Hui-Ping Wang ,  Mitchell Poirier ,  Scott A. Hooker

IPC: F16B5/08

Abstract: A weldment assembly includes a first component and a second component configured to be coupled to the first component. Additionally, the first component and the second component are coupled through a first linear stitch and a second linear stitch disposed parallel to the first linear stitch.

公开(公告)号：US20250044181A1

公开(公告)日：2025-02-06

申请号：US18364731

申请日：2023-08-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Hassan GHASSEMI-ARMAKI ,  Ranajit Ghosh ,  Junjie Ma ,  Robin James ,  Blair E. Carlson

IPC: G01M3/38

Abstract: A leak detection system for a battery enclosure for one of a rechargeable energy storage system, a battery cell, a battery module, and/or a battery pack includes a gas delivery system configured to selectively provide a trace gas to the battery enclosure. A first optical gas imaging sensor is configured to generate images of a surface of the battery enclosure after the gas delivery system charges the battery enclosure with trace gas. The images are used to selectively detect a gas cloud adjacent to the surface of the of the battery enclosure. The gas cloud is used to determine a location of a gas leak on the surface of the battery enclosure.

公开(公告)号：US20240095425A1

公开(公告)日：2024-03-21

申请号：US17933495

申请日：2022-09-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  Arizona Board of Regents on behalf of Arizona State University

Inventor： Ying Lu ,  Junjie Ma ,  Hui-ping Wang ,  Mitchell Poirier ,  Baixuan Yang ,  Jay Oswald

IPC: G06F30/27 ,  B23K9/095

CPC classification number: G06F30/27 ,  B23K9/0953

Abstract: Systems and methods are provided for predicting microhardness properties of a weld that defines a weld joint between at least two workpieces. The system includes a processor programmed to: receive temperature data that includes temperature values each attributed to a corresponding one of a plurality of points of the weld at corresponding times during a welding process used to produce the weld, determine peak temperature values and cooling rate values for each of the points of the weld based on the temperature values, predict a three-dimensional (3D) distribution of microhardness values of the weld based on a machine learning method that evaluates the peak temperature values and the cooling rate values, and generate display data based on the 3D distribution of microhardness values.

公开(公告)号：US20250001522A1

公开(公告)日：2025-01-02

申请号：US18343456

申请日：2023-06-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Teresa Jean RINKER ,  Masoud Mohammadpour ,  Junjie Ma ,  Chih-Chang Chen

IPC: B23K26/21 ,  H01M50/566

Abstract: A method for joining external tabs of a battery cell to a terminal includes providing a battery cell stack including C cathode electrodes, A anode electrodes, and S separators, where C, S and A are integers greater than one. The method includes arranging a stack of external tabs of one of the C cathode electrodes and the A anode electrodes on a terminal; creating a trench in the stack of external tabs of the one of the C cathode electrodes and the A anode electrodes at a weld location during a first laser processing step; and welding the stack of external tabs of the one of the C cathode electrodes and the A anode electrodes at the weld location during a second laser processing step.

公开(公告)号：US20240116133A1

公开(公告)日：2024-04-11

申请号：US18045585

申请日：2022-10-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Junjie Ma ,  John Forrest ,  William A. Keller ,  Baixuan Yang ,  Michael G. Poss ,  Blair E. Carlson

IPC: B23K26/042 ,  B23K26/06 ,  B23K26/211 ,  B23K26/70

CPC classification number: B23K26/042 ,  B23K26/0648 ,  B23K26/211 ,  B23K26/705

Abstract: Systems and methods determine alignment between a wire and a laser beam in laser joining. A system for checking alignment of a wire relative to a beam of a laser includes a controller configured to align, by tooling, the beam with a sensor system. A laser generates the beam across the wire, with the beam directed to the sensor system. The sensor system measures light intensity of the beam. A processor computes a feature parameter representative of an alignment between the wire and the beam. The processor determines whether the feature parameter is within the process specifications.