公开(公告)号：US20240145791A1

公开(公告)日：2024-05-02

申请号：US18407451

申请日：2024-01-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qingwei Yan ,  Xiaobin Dong ,  Jiazheng Wang

IPC: H01M10/42 ,  H01M4/04 ,  H01M4/139 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M10/4235 ,  H01M4/0402 ,  H01M4/139 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/027

Abstract: A secondary battery is provided, including a positive electrode plate and a negative electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer provided on two surfaces of the positive electrode current collector, the negative electrode plate includes a negative electrode current collector and a negative electrode film layer provided on two surfaces of the negative electrode current collector, and the negative electrode film layer includes a reaction zone opposite the positive electrode film layer and a non-reaction zone not opposite the positive electrode film layer, where a lithium supplement layer and a barrier layer are provided on the non-reaction zone. A preparation method of secondary battery, a battery module, a battery pack, and an electric apparatus are also provided.

公开(公告)号：US11901557B2

公开(公告)日：2024-02-13

申请号：US17547277

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Meng Kang ,  Xiaobin Dong ,  Jiazheng Wang ,  Libing He

IPC: H01M4/587 ,  H01M4/04 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/133 ,  H01M4/02

CPC classification number: H01M4/587 ,  H01M4/0404 ,  H01M4/133 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: The present application discloses a negative electrode active material and a method for preparing the same, a secondary battery, and an apparatus including the secondary battery. The negative electrode active material includes a core and a coating layer covering the surface of the core, the core includes artificial graphite, the coating layer includes amorphous carbon, and the particle size uniformity of the negative electrode active material is from 0.25 to 0.45.

公开(公告)号：US11682788B2

公开(公告)日：2023-06-20

申请号：US17810646

申请日：2022-07-05

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiaobin Dong ,  Jiazheng Wang ,  Meng Kang ,  Libing He

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/587 ,  H01M4/66 ,  H01M4/02

CPC classification number: H01M10/0525 ,  H01M4/0404 ,  H01M4/587 ,  H01M4/661 ,  H01M2004/021 ,  H01M2004/027

Abstract: Embodiments provide a secondary battery and an apparatus containing the secondary battery. The secondary battery includes a negative electrode plate. The negative electrode plate includes a copper-based current collector and a negative electrode film layer disposed on at least one surface of the copper-based current collector and including a negative electrode active material, and the negative electrode active material includes graphite. The negative electrode plate satisfies Tx≥25, where Tx is as defined in the specification.

公开(公告)号：US20220336844A1

公开(公告)日：2022-10-20

申请号：US17810610

申请日：2022-07-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Meng Kang ,  Xiaobin Dong ,  Jiazheng Wang ,  Libing He

IPC: H01M10/0525 ,  H01M4/587 ,  H01M4/04 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/04

Abstract: Embodiments provide a secondary battery and a preparation method thereof, and a battery module, battery pack, and apparatus containing such secondary battery. In those embodiments, a negative electrode plate includes a negative-electrode current collector and a negative-electrode film layer that is disposed on at least one surface of the negative-electrode current collector and that includes a negative-electrode active material. The negative-electrode active material contains graphite, and the negative electrode plate satisfies that, when the negative electrode plate and a lithium metal sheet constitute a button battery which is discharged to 5.0 mV at 0.05C, a capacity increment curve V-dQ/dV of the button battery has a third-order lithiation phase transition peak of graphite at position 0.055V-0.085V.

公开(公告)号：US20220166009A1

公开(公告)日：2022-05-26

申请号：US17547264

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiazheng Wang ,  Xiaobin Dong ,  Libing He

IPC: H01M4/36 ,  H01M4/133 ,  C01B32/205 ,  C01B32/05

Abstract: The present application discloses a negative electrode active material and a method for preparation thereof, a secondary battery, and an apparatus including the secondary battery. The negative electrode active material includes a core and a coating layer covering a surface of the core, the core includes artificial graphite, the coating layer includes amorphous carbon, the negative electrode active material has a surface area average particle size D(3,2) denoted as A, the negative electrode active material has a surface area average particle size D(3,2) denoted as B after powder compaction under a pressure of 20 kN, and the negative electrode active material satisfies: 72%≤B/A×100%≤82%.