公开(公告)号：US20230207786A1

公开(公告)日：2023-06-29

申请号：US18059431

申请日：2022-11-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Liangbin Liu ,  Jiazheng Wang ,  Zijian Lv ,  Qingwei Yan ,  Binyi Chen

IPC: H01M4/36 ,  H01M4/134 ,  H01M10/04

CPC classification number: H01M4/366 ,  H01M4/134 ,  H01M10/0468 ,  H01M2004/027

Abstract: The present application provides a secondary battery including a negative electrode sheet, and the negative electrode sheet includes: a negative electrode current collector; a first negative film layer provided on at least one surface of the negative electrode current collector; and a second negative film layer provided on a surface of the first negative film layer; where the first negative film layer includes a first negative active material and a first conductive agent, and the first negative active material includes a silicon-based material; and a mass proportion of the silicon-based material in the first negative film layer is greater than or equal to 30%, and a mass proportion of the first conductive agent in the first negative film layer is greater than or equal to 25%. A battery cell of the secondary battery of the present application does not easily expand and has good cycle performance.

公开(公告)号：US12074327B2

公开(公告)日：2024-08-27

申请号：US18052430

申请日：2022-11-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiazheng Wang ,  Binyi Chen ,  Xuan Li ,  Na Liu ,  Chuying Ouyang

IPC: H01M4/62 ,  C01B32/205

CPC classification number: H01M4/625 ,  C01B32/205 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40

Abstract: An artificial graphite satisfies: PD5t/PD0.5t≤1.35, where PD5t is a compacted density of the artificial graphite measured under a pressure of 5 ton, and PD0.5t is a compacted density of the artificial graphite measured under a pressure of 0.5 ton.

公开(公告)号：US20230216028A1

公开(公告)日：2023-07-06

申请号：US18182403

申请日：2023-03-13

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Binyi Chen ,  Jiazheng Wang ,  Qingwei Yan

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M4/133 ,  H01M4/134

CPC classification number: H01M4/364 ,  H01M4/38 ,  H01M4/587 ,  H01M4/133 ,  H01M4/134 ,  H01M2004/027

Abstract: A negative electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device are provided. The negative electrode plate includes a negative current collector and a negative film layer disposed on the negative current collector. The negative film layer includes a first negative film layer and a second negative film layer. The second negative film layer is located between the negative current collector and the first negative film layer. The second negative film layer includes a metal element M, and an atomic radius rM of M and an atomic radius rLi of Li satisfy




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