公开(公告)号：US20200280048A1

公开(公告)日：2020-09-03

申请号：US16875124

申请日：2020-05-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Meng Kang ,  Tianquan Peng ,  Yuliang Shen ,  Jiazheng Wang ,  Libing He

IPC: H01M4/133 ,  H01M4/583 ,  H01M10/0525

Abstract: The disclosure relates to a secondary battery comprising a negative electrode plate the same. Specifically, the present disclosure provides secondary battery, comprising a negative electrode plate, the negative electrode plate comprises a negative electrode current collector and a negative electrode layer coated on at least one surface of the negative electrode current collector, the negative electrode layer comprising a negative electrode active material, wherein the negative electrode active material comprises a graphite material, and the negative electrode layer fulfills the condition: 0.75≤7.8/D50+1.9*D50/(VOI)2≤2.0, wherein D50 represents a volume distribution average particle diameter of particles of the negative electrode active material in micron; VOI represents the OI value of the negative electrode layer. The secondary battery has the combination of high energy density, fast charge, and long cycle life.

公开(公告)号：US10700344B2

公开(公告)日：2020-06-30

申请号：US16199246

申请日：2018-11-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Meng Kang ,  Tianquan Peng ,  Yuliang Shen ,  Jiazheng Wang ,  Libing He

IPC: H01M4/133 ,  H01M4/583 ,  H01M10/0525 ,  H01M10/48 ,  H01M4/02

Abstract: The disclosure relates to a negative electrode plate and a secondary battery comprising the same. Specifically, the present disclosure provides a negative electrode plate comprising a negative electrode current collector and a negative electrode layer coated on at least one surface of the negative electrode current collector, the negative electrode layer comprising a negative electrode active material, wherein the negative electrode active material comprises a graphite material, and the negative electrode layer fulfills the condition: 0.45≤7.8/D50+1.9*D50/(VOI)2≤3.1, wherein D50 represents a volume distribution average particle diameter of particles of the negative electrode active material in micron; VOI represents the OI value of the negative electrode layer. The negative electrode plate can allow that a secondary battery containing the same has the combination of high energy density, fast charge, and long cycle life.

公开(公告)号：US20190097271A1

公开(公告)日：2019-03-28

申请号：US16199240

申请日：2018-11-26

Applicant: Contemporary Amperex Technology CO., Limited

Inventor： Jiazheng WANG ,  Meng Kang ,  Tianquan Peng ,  Yuliang Shen ,  Libing He

IPC: H01M10/0583 ,  H01M10/04 ,  H01M4/04 ,  H01M4/66

Abstract: The disclosure relates to a negative electrode plate and a secondary battery comprising the same. Specifically, the disclosure provides a negative electrode plate comprising a negative electrode current collector and a negative electrode layer coated on at least one surface of the negative electrode current collector, the negative electrode layer comprising a negative electrode active material, wherein the negative electrode active material comprises graphite, and the negative electrode layer meets: 4×L×VOI−¼×Dn10≤25, wherein L represents the thickness of single-side negative electrode layer on the negative electrode current collector in millimeter; Dn10 represents the particle diameter corresponding to 10% of the number distribution of particles of the negative electrode active material in micrometer; VOI represents the orientation index of the negative electrode layer. The negative electrode plate can allow that a secondary battery containing the same has the combination of high energy density, fast charge, and long cycle life.

公开(公告)号：US11296321B2

公开(公告)日：2022-04-05

申请号：US16395707

申请日：2019-04-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuliang Shen ,  Meng Kang ,  Tianquan Peng ,  Jiazheng Wang ,  Libing He

IPC: H01M4/583 ,  H01M4/133 ,  C01B32/20 ,  H01M4/02

Abstract: The present disclosure provides a negative electrode plate and a battery, the negative electrode plate comprises a negative current collector and a negative film, the negative film is provided on at least one surface of the negative current collector and comprises a negative active material, the negative active material comprises graphite, and the negative electrode plate satisfies a relationship: 0.27≤P×1.1/G+2/VOI≤1.3, P represents a porosity of the negative film, G represents a graphitization degree of the negative active material, VOI represents an OI value of the negative film. The battery of the present disclosure can have the characteristics of long cycle life, high energy density and excellent dynamics performance at the same time.

公开(公告)号：US11296320B2

公开(公告)日：2022-04-05

申请号：US16395700

申请日：2019-04-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Tianquan Peng ,  Yuliang Shen ,  Meng Kang ,  Jiazheng Wang ,  Libing He

IPC: H01M4/583 ,  H01M10/0525 ,  H01M4/02

Abstract: The present disclosure provides a secondary battery, the secondary battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte, the positive electrode plate comprises a positive current collector and a positive film, the positive film is provided on at least one surface of the positive current collector and comprises a positive active material, the negative electrode plate comprises a negative current collector and a negative film, the negative film is provided on at least one surface of the negative current collector and comprises a negative active material, the negative active material comprises graphite, and an average particle diameter of the positive active material represented by D50 and a thickness of the negative film represented by Hn satisfy a relationship: 6≤0.06Hn×(4−1/D50)≤31. The battery of the present disclosure has the characteristics of excellent dynamics performance and long cycle life at the same time.

公开(公告)号：US20190334172A1

公开(公告)日：2019-10-31

申请号：US16389760

申请日：2019-04-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng KANG ,  Tianquan Peng ,  Yuliang Shen ,  Libing He

IPC: H01M4/587 ,  H01M4/133

Abstract: The present disclosure provides a negative electrode plate and a battery, the negative electrode plate comprises a negative current collector and a negative film, the negative film is provided on at least one surface of the negative current collector and comprises a negative active material. The negative active material comprises graphite, and an OI value of the negative film represented by VOI and a pressing density of the negative film represented by PD satisfy a relationship: 0.7≤(80/VOI+43/PD)×PD/VOI≤21.5, where a unit of the pressing density of the negative film represented by PD is g/cm3. The battery of the present disclosure can have the characteristics of fast charging speed, high energy density, good safety performance and long cycle life at the same time.

公开(公告)号：US11177477B2

公开(公告)日：2021-11-16

申请号：US16389760

申请日：2019-04-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng Kang ,  Tianquan Peng ,  Yuliang Shen ,  Libing He

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

Abstract: The present disclosure provides a negative electrode plate and a battery, the negative electrode plate comprises a negative current collector and a negative film, the negative film is provided on at least one surface of the negative current collector and comprises a negative active material. The negative active material comprises graphite, and an OI value of the negative film represented by VOI and a pressing density of the negative film represented by PD satisfy a relationship: 0.7≤(80/VOI+43/PD)×PD/VOI≤21.5, where a unit of the pressing density of the negative film represented by PD is g/cm3. The battery of the present disclosure can have the characteristics of fast charging speed, high energy density, good safety performance and long cycle life at the same time.

公开(公告)号：US11133494B2

公开(公告)日：2021-09-28

申请号：US16875124

申请日：2020-05-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Meng Kang ,  Tianquan Peng ,  Yuliang Shen ,  Jiazheng Wang ,  Libing He

IPC: H01M4/133 ,  H01M4/583 ,  H01M10/0525 ,  H01M10/48 ,  H01M4/02

Abstract: The disclosure relates to a secondary battery comprising a negative electrode plate the same. Specifically, the present disclosure provides secondary battery, comprising a negative electrode plate, the negative electrode plate comprises a negative electrode current collector and a negative electrode layer coated on at least one surface of the negative electrode current collector, the negative electrode layer comprising a negative electrode active material, wherein the negative electrode active material comprises a graphite material, and the negative electrode layer fulfills the condition: 0.75≤7.8/D50+1.9*D50/(VOI)2≤2.0, wherein D50 represents a volume distribution average particle diameter of particles of the negative electrode active material in micron; VOI represents the OI value of the negative electrode layer. The secondary battery has the combination of high energy density, fast charge, and long cycle life.

公开(公告)号：US11088361B2

公开(公告)日：2021-08-10

申请号：US16389752

申请日：2019-04-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng Kang ,  Tianquan Peng ,  Yuliang Shen ,  Jiazheng Wang ,  Libing He

IPC: H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/058 ,  H01M4/02

Abstract: The present disclosure provides a secondary battery, the secondary battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte, the negative electrode plate comprises a negative current collector and a negative film, the negative film is provided on at least one surface of the negative current collector and comprises a negative active material. The secondary battery satisfies relationships 3.9≤G×3.5+2.8/CB≤6.2 and 1.23≤0.55/VOI+CB×1.2≤2.80 at the same time. The battery of the present disclosure has the characteristics of high energy density and excellent dynamics performance, and the battery of the present disclosure also has the characteristic of long cycle life while charged under a large rate and a fast speed.

公开(公告)号：US10658703B2

公开(公告)日：2020-05-19

申请号：US16199240

申请日：2018-11-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiazheng Wang ,  Meng Kang ,  Tianquan Peng ,  Yuliang Shen ,  Libing He

IPC: H01M4/13 ,  H01M10/0583 ,  H01M4/04 ,  H01M4/587 ,  H01M4/133 ,  H01M4/66 ,  H01M10/04 ,  H01M4/02

Abstract: The disclosure relates to a negative electrode plate and a secondary battery comprising the same. Specifically, the disclosure provides a negative electrode plate comprising a negative electrode current collector and a negative electrode layer coated on at least one surface of the negative electrode current collector, the negative electrode layer comprising a negative electrode active material, wherein the negative electrode active material comprises graphite, and the negative electrode layer meets: 4×L×VOI−¼×Dn10≤25, wherein L represents the thickness of single-side negative electrode layer on the negative electrode current collector in millimeter; Dn10 represents the particle diameter corresponding to 10% of the number distribution of particles of the negative electrode active material in micrometer; VOI represents the orientation index of the negative electrode layer. The negative electrode plate can allow that a secondary battery containing the same has the combination of high energy density, fast charge, and long cycle life.