公开(公告)号：US20240421289A1

公开(公告)日：2024-12-19

申请号：US18814587

申请日：2024-08-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Liangbin Liu ,  Jiazheng Wang ,  Zijian Lv ,  Yuan Li ,  Jingxian Deng ,  Donggen Xiong ,  Xiaobin Dong

IPC: H01M4/36 ,  C01B32/21 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0525

Abstract: Provided are a negative electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus. The negative electrode active material includes: a core material; and a first coating layer provided on at least part of a surface of the core material, where the first coating layer includes a porous carbon material and nano silicon-based particles, and the nano silicon-based particles are embedded into pore structures of the porous carbon material.

公开(公告)号：US20240266618A1

公开(公告)日：2024-08-08

申请号：US18640009

申请日：2024-04-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qingwei Yan ,  Jiazheng Wang ,  Xiaobin Dong

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/139 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587

CPC classification number: H01M10/4235 ,  H01M4/139 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/027 ,  H01M2220/20

Abstract: This application relates to a secondary battery 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 each of 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 each of 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 barrier layer is provided on a surface of the non-reaction zone. This application also relates to a preparation method of secondary battery, a battery module, a battery pack, and an electric apparatus.

公开(公告)号：US11961993B2

公开(公告)日：2024-04-16

申请号：US17056958

申请日：2019-12-06

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/133 ,  H01M4/139 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M4/02 ,  H01M10/0525

CPC classification number: H01M4/133 ,  H01M4/139 ,  H01M4/364 ,  H01M4/366 ,  H01M4/386 ,  H01M4/387 ,  H01M4/583 ,  H01M2004/027 ,  H01M10/0525 ,  H01M2220/20

Abstract: This application relates to a secondary battery and an apparatus including the secondary battery. Specifically, the secondary battery of this application includes a negative electrode plate, where the negative electrode plate includes a negative current collector and negative film layers where the negative film layers include a first negative film layer and a second negative film layer, the first negative film layer is disposed on at least one surface of the negative current collector and includes a first negative active material, and the second negative film layer is disposed on the first negative film layer and includes a second negative active material; the first negative active material includes natural graphite, and the second negative active material includes artificial graphite; the first negative active material satisfies 4.0≤COI1≤7.0; and the second negative active material satisfies 2.2≤COI2≤4.2.

公开(公告)号：US11658335B2

公开(公告)日：2023-05-23

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: H01M4/587 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/04 ,  H01M4/02

CPC classification number: H01M10/0525 ,  H01M4/0404 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0427 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

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 0.05 C, 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：US20240413332A1

公开(公告)日：2024-12-12

申请号：US18424880

申请日：2024-01-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiazheng Wang ,  Qingwei Yan ,  Xiaobin Dong

IPC: H01M4/62 ,  B60L50/64 ,  H01M4/02 ,  H01M4/133 ,  H01M4/36 ,  H01M4/587

Abstract: Provided are a battery cell, a battery and an electric device. The battery cell includes a positive electrode plate and a negative electrode plate, the negative electrode plate includes a negative electrode current collector, a negative electrode active material layer arranged on at least one surface of the negative electrode current collector, and a lithium supplement layer, wherein the negative electrode active material layer includes a first portion and a second portion connected with the first portion, the first portion exceeds the positive electrode plate, the second portion is arranged corresponding to the positive electrode plate, and the lithium supplement layer is arranged on at least part of a surface of the first portion away from the negative electrode current collector. The negative electrode plate of the present application can improve the first Coulomb efficiency, cycle performance and storage performance of the battery cell.

公开(公告)号：US20240170641A1

公开(公告)日：2024-05-23

申请号：US18424867

申请日：2024-01-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaobin Dong ,  Jiazheng Wang ,  Qingwei Yan

IPC: H01M4/13 ,  H01M4/02 ,  H01M4/62

CPC classification number: H01M4/13 ,  H01M4/628 ,  H01M2004/021 ,  H01M2004/027

Abstract: Provided are a secondary battery and a battery module, battery pack, and electric apparatus containing such secondary battery. The secondary battery includes: a positive electrode plate including a positive electrode film layer; a separator; and a negative electrode plate. The negative electrode plate includes: a first negative electrode film layer, the first negative electrode film layer being provided opposite the positive electrode film layer with the separator therebetween; and a second negative electrode film layer, the second negative electrode film layer including a negative electrode film layer not provided opposite the positive electrode film layer, and the second negative electrode film layer including a central region and a peripheral region surrounding the central region, where a lithium source used for supplementing lithium to the first negative electrode film layer is stored in at least a portion of the peripheral region of the second negative electrode film layer.

公开(公告)号：US11901546B2

公开(公告)日：2024-02-13

申请号：US17547291

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/133 ,  H01M10/0525 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/587 ,  H01M4/02

CPC classification number: H01M4/133 ,  H01M4/1393 ,  H01M4/364 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2220/20

Abstract: The present application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery. Particularly, the secondary battery comprises a negative electrode plate, wherein the negative electrode plate comprises a negative electrode current collector and a negative electrode film, and the negative electrode film comprises a first negative electrode film and a second negative electrode film; the first negative electrode film is disposed on at least one surface of the negative electrode current collector and comprises a first negative electrode active material; and the second negative electrode film is disposed on the first negative electrode film and comprises a second negative electrode active material; the first and second negative electrode active materials both comprise artificial graphite; the first negative electrode active material comprises primary particles, and a number percentage of the primary particles in the first negative electrode active material A satisfies A≥50%.

公开(公告)号：US20230282829A1

公开(公告)日：2023-09-07

申请号：US18174652

申请日：2023-02-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaobin Dong ,  Jiazheng Wang

IPC: H01M4/587 ,  C01B32/205

CPC classification number: H01M4/587 ,  C01B32/205 ,  H01M2004/027

Abstract: An artificial graphite and preparation method thereof, negative electrode plates, secondary batteries, battery modules, battery packs, and electrical device are provided. In some embodiments, the artificial graphite has a particle size of Dv5016 μm and an air oxidation peak temperature Tpeak of 830° C., wherein the air oxidation peak temperature Tpeak of artificial graphite refers to the highest peak temperature of a differential thermo-gravimetric analysis curve obtained when the artificial graphite is subjected to a thermo-gravimetric test having a weighing mass of 10±0.05 mg, with a purging gas of air, an airflow rate of 60 mL/min, and a heating rate of 5° C./min, in a test temperature range of 40° C. to 950° C. By the present application, the resulting secondary batteries have higher first-cycle Coulomb efficiency and longer cycle life under the premise of good fast charging performance.

公开(公告)号：US11646416B2

公开(公告)日：2023-05-09

申请号：US17566691

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/583 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/02

CPC classification number: H01M4/583 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028

Abstract: This application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery. In particular, the negative electrode plate comprises a negative current collector and a negative electrode film, wherein the negative electrode film comprises a first negative electrode film and a second negative electrode film, the first negative electrode film is disposed on at least one surface of the negative current collector and comprises a first negative electrode active material, the first negative electrode active material comprises graphite, and the particle size uniformity of the first negative electrode active material is from 0.4 to 0.6; the second negative electrode film is disposed on the first negative electrode film and comprises a second negative electrode active material, the second negative electrode active material comprises artificial graphite, and the particle size uniformity of the second negative electrode active material is from 0.25 to 0.45.

公开(公告)号：US20220123306A1

公开(公告)日：2022-04-21

申请号：US17566691

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/583

Abstract: This application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery. In particular, the negative electrode plate comprises a negative current collector and a negative electrode film, wherein the negative electrode film comprises a first negative electrode film and a second negative electrode film, the first negative electrode film is disposed on at least one surface of the negative current collector and comprises a first negative electrode active material, the first negative electrode active material comprises graphite, and the particle size uniformity of the first negative electrode active material is from 0.4 to 0.6; the second negative electrode film is disposed on the first negative electrode film and comprises a second negative electrode active material, the second negative electrode active material comprises artificial graphite, and the particle size uniformity of the second negative electrode active material is from 0.25 to 0.45.