公开(公告)号：US20240072259A1

公开(公告)日：2024-02-29

申请号：US17894687

申请日：2022-08-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael A. Lelli ,  Seung-Woo Chu ,  Gayatri V. Dadheech

IPC: H01M4/62 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M10/0525 ,  H01M2004/027

Abstract: A system including a lithium-ion battery cell is disclosed. The lithium-ion battery cell includes a first electrode. The first electrode includes a current collector including a surface and an electrode coating formed from an electrode coating slurry and disposed on the current collector. The electrode coating slurry includes a plurality of flakes of flake graphite. Each of the plurality of flakes includes two parallel planar surfaces and an edge plane defined by the two parallel planar surfaces. The edge planes of the plurality of flakes are statistically facing toward the surface of the current collector. The first electrode further includes a conductive material including a high aspect ratio nano-sized carbon material. The carbon material is configured for providing attractive forces between components of the electrode coating. The lithium-ion battery cell further includes a second electrode, a separator disposed between the first electrode and the second electrode, and an electrolyte.

公开(公告)号：US20250023088A1

公开(公告)日：2025-01-16

申请号：US18351833

申请日：2023-07-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Liang Xi ,  Michael V. Pyrtko ,  SriLakshmi Katar ,  Michael A. Lelli

IPC: H01M10/04 ,  H01M50/103 ,  H01M50/46 ,  H01M50/538

Abstract: A hexagonal battery cell. The battery cell may include a wound jelly roll within a hexagonally shaped case. The jelly roll may include a separator layer sandwiched between a cathode layer and an anode layer, with the separator, cathode, and anode layers wound together relative to a central axis. The hexagonally shaped case may surround a perimeter of the jelly roll.

公开(公告)号：US20240030514A1

公开(公告)日：2024-01-25

申请号：US17870150

申请日：2022-07-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Taylor R. Garrick ,  Michael A. Lelli

IPC: H01M10/6556 ,  H01M10/613 ,  H01M10/6568 ,  H01M10/643

CPC classification number: H01M10/6556 ,  H01M10/613 ,  H01M10/6568 ,  H01M10/643

Abstract: An electrochemical battery cell includes a plurality of first electrodes, a plurality of second electrodes, a plurality of layers interleaved between and stacked in an electrode stack along a central stack axis with the first and second electrodes, a first current collector, and a second current collector. The second current collector includes an elongated cylinder and a fluidic coupler, the second current collector extends axially through the central stack cavity, and the second current collector includes a flow channel extending longitudinally between a first end and a second end.

公开(公告)号：US20230054685A1

公开(公告)日：2023-02-23

申请号：US17407487

申请日：2021-08-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael A. Lelli ,  Jing Gao

IPC: H01M10/0583 ,  H01M50/538 ,  H01M50/533

Abstract: Presented are stacked electrode designs for electrochemical devices, methods for making/using such electrochemical devices, and lithium-class cylindrical and prismatic battery cells with stacked electrode architectures. An electrochemical device employs multiple first (e.g., anode) electrodes and multiple second (e.g., cathode) electrodes, each of which includes an active (anode/cathode) electrode material borne by an electrode body and a flexible tab projecting from the electrode body. Multiple electrically insulating separators are interleaved between and stacked along a central stack axis with the electrodes to define an electrode stack. A first electrically conductive current collector fully or partially surrounds the electrode stack and interference fits with the electrode tabs of the first electrodes to electrically connect thereto. A second electrically conductive current collector is disposed inside the first current collector, aligned substantially parallel with the central stack axis, and interference fit with the electrode tabs of the second electrodes to electrically connect thereto.