公开(公告)号：US20240387936A1

公开(公告)日：2024-11-21

申请号：US18318111

申请日：2023-05-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Meng JIANG ,  Erik Brandon GOLM ,  Meinan HE ,  Louis G. HECTOR, JR. ,  Feng FENG

IPC: H01M50/325 ,  H01M10/647 ,  H01M50/383

Abstract: A pouch battery cell includes a pouch enclosure and a battery cell arranged in the pouch enclosure. A first terminal is connected to the battery cell through the pouch enclosure. A second terminal is connected to the battery cell through the pouch enclosure. A check valve includes a first gas channel in fluid communication with an inner volume of the pouch enclosure and a second gas channel. The check valve vents gas from the pouch enclosure when a difference between pressure at the first gas channel and the second gas channel is greater than a predetermined pressure difference and restricts flow of gas from the second gas channel to the first gas channel.

公开(公告)号：US20240072242A1

公开(公告)日：2024-02-29

申请号：US17897959

申请日：2022-08-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Meng JIANG ,  Gongshin QI ,  Louis G. HECTOR, JR.

IPC: H01M4/36 ,  H01M4/04

CPC classification number: H01M4/364 ,  H01M4/0404 ,  H01M4/623

Abstract: A method for forming an electrode for an electrochemical cell that cycles lithium ions is provided. The method includes contacting a precursor electroactive material and a conductive material to a polymeric solution including a first solvent and a binder material to form a first admixture; applying a mixing force to the first admixture to form a first mixture; drying the first mixture to form a plurality of electroactive material agglomerates, each agglomerate including an electroactive material particle in contact with the conductive material via the binder material; contacting the plurality of electroactive material agglomerates to a second solvent to form a second admixture, the binder material being insoluble in the second solvent; applying a mixing force to the second admixture to form a second mixture; and disposing the second mixture on or near one or more surfaces of a current collector to form the electrode.

公开(公告)号：US20230155108A1

公开(公告)日：2023-05-18

申请号：US17526762

申请日：2021-11-15

Applicant: GM Global Technology Operations LLC

Inventor： Meng JIANG ,  Xiaosong HUANG ,  Marissa Marie KERRIGAN

IPC: H01M4/131 ,  H01M4/1391 ,  H01M4/66 ,  H01M10/0525

CPC classification number: H01M4/131 ,  H01M4/1391 ,  H01M4/667 ,  H01M4/663 ,  H01M10/0525

Abstract: Methods of making a thick multilayer electrode for an electrochemical cell that cycles lithium are provided. The methods may include forming the multilayer electrode on a current collector by forming a plurality of electrode units to define an electrode stack on the current collector. Each unit of the plurality of electrode units comprises an electroactive material layer comprising a plurality of electroactive particles and an interfacial conductive material layer comprising a plurality of graphene nanoparticles. The electrode stack has a thickness of greater than or equal to about 100 micrometers and is capable of winding and withstanding a bend angle of greater than or equal to a radius of curvature of less than or equal to about 1 radian/inch while remaining substantially free of macrocracks.