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    SECONDARY BATTERY, APPARATUS, ARTIFICIAL GRAPHITE AND PREPARATION METHOD THEREOF
    2.
    发明申请
    SECONDARY BATTERY, APPARATUS, ARTIFICIAL GRAPHITE AND PREPARATION METHOD THEREOF 有权

    公开(公告)号：US20210313575A1

    公开(公告)日：2021-10-07

    申请号：US17345201

    申请日：2021-06-11

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Rui SHEN ,  Libing HE ,  Yuanyuan LI

    IPC: H01M4/587 ,  H01M4/133 ,  C01B32/205

    Abstract: The present application discloses a secondary battery comprising a negative electrode plate, an apparatus including the secondary battery, an artificial graphite and a preparation method thereof, the negative electrode plate comprising a negative active material, wherein the negative active material comprises an artificial graphite having a volume average particle size Dv50 of 12 μm to 22 μm, and satisfying: 12≤Dv50×SSA≤25, in which SSA is the specific surface area of artificial graphite, in m2/g; the negative electrode plate has a compaction density of 1.6 g/cm3 to 1.75 g/cm3 and an OI value of at most 15, wherein the OI value represents a ratio C004/C110, in which C004 is the peak area of the diffraction peak of 004 crystal plane of artificial graphite in the negative electrode plate and C110 is the peak area of the diffraction peak of 110 crystal plane of artificial graphite in the negative electrode plate.

    NEGATIVE ELECTRODE PLATE, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND APPARATUS
    3.
    发明申请
    NEGATIVE ELECTRODE PLATE, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND APPARATUS 有权

    公开(公告)号：US20210135200A1

    公开(公告)日：2021-05-06

    申请号：US17051187

    申请日：2019-10-14

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Jianjun MA ,  Libing HE

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

    Abstract: This application provides a negative electrode plate, a secondary battery, a battery module, a battery pack, and an apparatus. The negative electrode plate includes a negative current collector and a plurality of active substance layers on the negative current collector. The plurality of active substance layers include at least a first active substance layer and a second active substance layer. The first active substance layer includes a first negative active substance, and the second active substance layer includes a second negative active substance. A ratio of gram capacity of the negative active substance of the first active substance layer to thickness of the first active substance layer is 3.5-10.0. A ratio of gram capacity of the negative active substance of the second active substance layer to thickness of the second active substance layer is 6.5-23.0.

    NEGATIVE ELECTRODE SHEET AND BATTERY
    6.
    发明申请
    NEGATIVE ELECTRODE SHEET AND BATTERY 有权

    公开(公告)号：US20210249656A1

    公开(公告)日：2021-08-12

    申请号：US16973536

    申请日：2019-10-15

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Jiazheng WANG ,  Meng KANG ,  Yuliang SHEN ,  Libing HE

    IPC: H01M4/583 ,  H01M4/38

    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 μm; 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.

    NEGATIVE ELECTRODE PLATE AND BATTERY
    8.
    发明申请
    NEGATIVE ELECTRODE PLATE AND BATTERY 审中-公开

    公开(公告)号：US20190341612A1

    公开(公告)日：2019-11-07

    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 ,  C01B32/20

    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.

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