Patents by Inventor Jiazheng WANG

Jiazheng WANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220336844
    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.
    Type: Application
    Filed: July 4, 2022
    Publication date: October 20, 2022
    Inventors: Meng Kang, Xiaobin Dong, Jiazheng Wang, Libing He
  • Publication number: 20220336845
    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.
    Type: Application
    Filed: July 5, 2022
    Publication date: October 20, 2022
    Inventors: Xiaobin Dong, Jiazheng Wang, Meng Kang, Libing He
  • Patent number: 11469409
    Abstract: The present invention provides a negative electrode plate and a battery. The negative electrode plate comprises a negative current collector and a negative film that is provided on at least one surface of the negative current collector and comprises a negative active material. The negative film meets the follow relations: 6.0?PD×Dv50?32.0 and 0.2?PD/Dn10?12.0. The negative electrode plate of the present invention has excellent dynamic performance, and the battery of the present invention has both excellent dynamic performance and long cycle life.
    Type: Grant
    Filed: April 15, 2021
    Date of Patent: October 11, 2022
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Jiazheng Wang, Yuliang Shen, Meng Kang, Libing He, Baojian Zhu, Lei Chen
  • Patent number: 11469418
    Abstract: The present application provides a negative electrode sheet and a battery. The negative electrode sheet includes a negative current collector and a negative electrode film provided on at least one surface of the negative current collector and including a negative active material, and the negative electrode film satisfies: 4?P×[(30?Dv50)/2+2×(10?M)]?20. P represents a porosity of the negative electrode film; Dv50 represents a volume median particle diameter of the negative active material, and a unit is ?m; M represents a capacity per unit area of a negative electrode film, and a unit is mAh/cm2. The negative electrode sheet of the present application has the characteristics of excellent dynamics performance, and the battery of the present application also has the characteristics of excellent dynamics performance, long cycle life and high energy density at the same time.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: October 11, 2022
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Jiazheng Wang, Meng Kang, Yuliang Shen, Libing He
  • Publication number: 20220166009
    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%.
    Type: Application
    Filed: December 10, 2021
    Publication date: May 26, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Jiazheng Wang, Xiaobin Dong, Libing He
  • Publication number: 20220123287
    Abstract: The present application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery.
    Type: Application
    Filed: December 31, 2021
    Publication date: April 21, 2022
    Applicant: Contemporay Amperex Technology Co., Limited
    Inventors: Jiazheng Wang, Meng Kang, Xiaobin Dong, Yuliang Shen, Libing He
  • Publication number: 20220123306
    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.
    Type: Application
    Filed: December 31, 2021
    Publication date: April 21, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Meng KANG, Jiazheng Wang, Xiaobin Dong, Libing He
  • Patent number: 11296321
    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.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: April 5, 2022
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Yuliang Shen, Meng Kang, Tianquan Peng, Jiazheng Wang, Libing He
  • Patent number: 11296320
    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.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: April 5, 2022
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Tianquan Peng, Yuliang Shen, Meng Kang, Jiazheng Wang, Libing He
  • Publication number: 20220102701
    Abstract: The present application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery.
    Type: Application
    Filed: December 10, 2021
    Publication date: March 31, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Meng KANG, Jiazheng Wang, Xiaobin Dong, Libing He
  • Publication number: 20220102788
    Abstract: This application discloses a secondary battery and an apparatus containing the secondary battery. The secondary battery secondary battery includes an electrode assembly including a cell and tabs extending from the cell, the cell includes a negative electrode plate, the negative electrode plate includes a negative current collector and a negative electrode film arranged on at least one surfaces of the negative current collector and including a negative active material, wherein the negative active material includes artificial graphite including secondary particles; and the cell satisfies 5 cm?0.5×?{square root over (a2+b2)}?15 cm, and a?15 cm, wherein a is the maximum size of the cell in the direction that the tabs extend, in cm; and b is the maximum size of the cell in a direction perpendicularly intersecting with the direction that the tabs extend, in cm.
    Type: Application
    Filed: December 8, 2021
    Publication date: March 31, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Xiaobin Dong, Jiazheng Wang, Meng Kang, Libing He
  • Publication number: 20220102711
    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.
    Type: Application
    Filed: December 10, 2021
    Publication date: March 31, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Meng KANG, Xiaobin DONG, Jiazheng WANG, Libing HE
  • Patent number: 11283061
    Abstract: The present disclosure provides a battery and a testing method of an active specific surface area of an electrode plate. The 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 negative active material comprises graphite, and an active specific surface area of the negative electrode plate is 1 cm2/g˜15 cm2/g. In the present disclosure, by reasonably controlling the active specific surface area of the negative electrode plate can make the battery have the characteristics of high energy density and excellent dynamics performance at the same time.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: March 22, 2022
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Yuliang Shen, Meng Kang, Jiazheng Wang, Libing He, Qiqi Zuo
  • Publication number: 20220059864
    Abstract: The present application relates to a negative electrode plate and a secondary battery. Specifically, the present application provides a negative electrode plate comprising a negative electrode current collector and an negative electrode film coated on at least one surface of the negative electrode current collector and containing the negative active material, wherein the negative electrode plate satisfies 0.6?0.7×P×(D90?D10)/D50+B/3?8.0, wherein P refers to the porosity of the negative electrode film; B refers to the active specific surface area of the negative electrode film, and the unit thereof is m2/g; D10 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 10%, D90 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 90%, and D50 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 50%.
    Type: Application
    Filed: November 5, 2021
    Publication date: February 24, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Yuliang SHEN, Meng KANG, Jiazheng WANG, Libing HE
  • Patent number: 11237215
    Abstract: The present application provides a method for determining fast charge performance of a negative electrode plate and a method for designing a negative electrode plate. By utilizing the method(s) according to the present application, the charging speed of a negative electrode plate can be quickly evaluated and the design period of a negative electrode plate in a fast charge battery can be greatly shortened.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: February 1, 2022
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Jiazheng Wang, Meng Kang, Xiaobin Dong, Yuliang Shen, Libing He
  • Publication number: 20210336244
    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 satisties 4.0?COI1?7.0; and the second negative active material satisties 2.2?COI2?4.2.
    Type: Application
    Filed: December 6, 2019
    Publication date: October 28, 2021
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Meng KANG, Xiaobin DONG, Jiazheng WANG, Libing HE
  • Patent number: 11133494
    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.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: September 28, 2021
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Meng Kang, Tianquan Peng, Yuliang Shen, Jiazheng Wang, Libing He
  • Patent number: 11114659
    Abstract: The present application provides a negative electrode sheet and a secondary battery. The negative electrode sheet includes a negative current collector and a negative electrode film provided on at least one surface of the negative current collector and comprising a negative active substance. The negative electrode sheet also satisfies: 0.3?a×(1.1/b+0.02×c)?6.0, where a represents the specific surface area of the negative electrode film, and the unit is m2/g; b represents the compaction density of the negative electrode film, and the unit is g/cm3; c represents the cohesive force between the negative electrode film and the negative current collector, and the unit is N/m. The present application can make the negative electrode sheet have excellent dynamics performance, and meanwhile ensure that the secondary battery has good dynamics performance and cycle performance without sacrificing energy density.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: September 7, 2021
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Meng Kang, Yuliang Shen, Jiazheng Wang, Libing He
  • Publication number: 20210249650
    Abstract: The present application provides a negative electrode sheet and a secondary battery. The negative electrode sheet includes a negative current collector and a negative electrode film provided on at least one surface of the negative current collector and comprising a negative active substance. The negative electrode sheet also satisfies: 0.3?a×(1.1/b+0.02×c)?6.0, where a represents the specific surface area of the negative electrode film, and the unit is m2/g; b represents the compaction density of the negative electrode film, and the unit is g/cm3; c represents the cohesive force between the negative electrode film and the negative current collector, and the unit is N/m. The present application can make the negative electrode sheet have excellent dynamics performance, and meanwhile ensure that the secondary battery has good dynamics performance and cycle performance without sacrificing energy density.
    Type: Application
    Filed: October 14, 2019
    Publication date: August 12, 2021
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Meng KANG, Yuliang SHEN, Jiazheng WANG, Libing HE
  • Publication number: 20210249656
    Abstract: The present application provides a negative electrode sheet and a battery. The negative electrode sheet includes a negative current collector and a negative electrode film provided on at least one surface of the negative current collector and including a negative active material, and the negative electrode film satisfies: 4?P×[(30?Dv50)/2+2×(10?M)]?20. P represents a porosity of the negative electrode film; Dv50 represents a volume median particle diameter of the negative active material, and a unit is ?m; M represents a capacity per unit area of a negative electrode film, and a unit is mAh/cm2. The negative electrode sheet of the present application has the characteristics of excellent dynamics performance, and the battery of the present application also has the characteristics of excellent dynamics performance, long cycle life and high energy density at the same time.
    Type: Application
    Filed: October 15, 2019
    Publication date: August 12, 2021
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Jiazheng WANG, Meng KANG, Yuliang SHEN, Libing HE