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    NEGATIVE ELECTRODE PLATE, SECONDARY BATTERY AND APPARATUS THEREOF
    26.
    发明申请
    NEGATIVE ELECTRODE PLATE, SECONDARY BATTERY AND APPARATUS THEREOF 有权

    公开(公告)号：US20220209226A1

    公开(公告)日：2022-06-30

    申请号：US17697930

    申请日：2022-03-18

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Cheng LI ,  Qisen HUANG ,  Xin LIU ,  Changliang SHENG ,  Shiwen WANG ,  Xianghui LIU ,  Jia PENG ,  Mingling LI ,  Chengdu LIANG

    IPC: H01M4/38 ,  H01M4/583 ,  H01M4/66 ,  H01M4/04

    Abstract: This application relates to a negative electrode plate, a secondary battery and apparatus thereof. The secondary battery of the present application comprises a negative electrode plate, the negative electrode plate comprises a composite current collector and a negative electrode active material layer disposed on at least one surface of the composite current collector, the negative electrode active material layer comprises a silicon-based active material, the silicon-based active material accounts for 0.5 wt % to 50 wt % of total mass of the negative electrode active material layer, and the composite current collector comprises a polymer support layer and a metal conductive layer disposed on at least one surface of the polymer support layer, and the composite current collector has a brittleness parameter C ranging from 0.03 to 0.5. The secondary battery and the negative electrode plate achieve good coordination between the current collector and the negative electrode active material layer.

    POSITIVE ELECTRODE CURRENT COLLECTOR, POSITIVE ELECTRODE PLATE, ELECTROCHEMICAL DEVICE, AND APPARATUS
    27.
    发明申请
    POSITIVE ELECTRODE CURRENT COLLECTOR, POSITIVE ELECTRODE PLATE, ELECTROCHEMICAL DEVICE, AND APPARATUS 有权

    公开(公告)号：US20220085379A1

    公开(公告)日：2022-03-17

    申请号：US17536103

    申请日：2021-11-29

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Xin LIU ,  Shiwen WANG ,  Qisen HUANG ,  Cheng LI ,  Mingling Ll ,  Jia PENG ,  Xianghui LIU

    IPC: H01M4/66 ,  H01M4/36 ,  H01M10/0525

    Abstract: The present application discloses a positive electrode current collector, a positive electrode plate, an electrochemical device, and an apparatus. The positive electrode current collector includes a polymer material-based support layer and an aluminum-based conductive layer disposed on at least one surface of the support layer; a thickness D1 of the aluminum-based conductive layer, a tensile strength T of the support layer, and a thickness D2 of the support layer satisfy a relational formula 0.01≤(200×D1)/(T×D2)≤0.5, in the formula D1 and D2 are in the same unit, and T is in MPa. The positive electrode current collector has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the positive electrode current collector, the positive electrode plate and the electrochemical device and their reliability during use.

    POSITIVE ELECTRODE CURRENT COLLECTOR, POSITIVE ELECTRODE PIECE, ELECTROCHEMICAL DEVICE AND APPARATUS
    29.
    发明申请
    POSITIVE ELECTRODE CURRENT COLLECTOR, POSITIVE ELECTRODE PIECE, ELECTROCHEMICAL DEVICE AND APPARATUS 有权

    公开(公告)号：US20210111412A1

    公开(公告)日：2021-04-15

    申请号：US17132173

    申请日：2020-12-23

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Chengdu LIANG ,  Qisen HUANG ,  Shiwen WANG

    IPC: H01M4/66

    Abstract: A positive electrode current collector, a positive electrode piece, an electrochemical device and an apparatus, where the positive electrode current collector includes a support layer and a conductive layer provided on the support layer, where a material of the conductive layer is aluminum or aluminum alloy, and a thickness Di of the conductive layer is 300 nm≤D1≤2 μm; an elongation at break B of the support layer is 10000%≥B≥12%, and a volume resistivity of the support layer is greater than or equal to 1.0×10−5 Ω·m; when a tensile strain of the positive electrode current collector is 2%, a square resistance growth rate Ti of the conductive layer is T1≤10%. The positive electrode current collector provided in the present application can simultaneously take into account both high safety performance and electrical performance.

    CURRENT COLLECTOR, ELECTRODE PLATE INCLUDING THE SAME AND ELECTROCHEMICAL DEVICE
    30.
    发明申请
    CURRENT COLLECTOR, ELECTRODE PLATE INCLUDING THE SAME AND ELECTROCHEMICAL DEVICE 审中-公开

    公开(公告)号：US20200295377A1

    公开(公告)日：2020-09-17

    申请号：US16342831

    申请日：2018-12-05

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Chengdu LIANG ,  Huafeng HUANG ,  Qisen HUANG

    IPC: H01M4/66 ,  H01M10/0525

    Abstract: The present disclosure relates to the field of battery and, in particular, relates to a current collector, an electrode plate including the current collector, and an electrochemical device. The current collector of the present disclosure includes an insulation layer and a conductive layer. The insulation layer is used to support the conductive layer. The conductive layer is used to support an electrode active material layer and is located on at least one surface of the insulation layer. The insulation layer has a density smaller than that of the conductive layer. The insulation layer has a thickness of D1 satisfying 1 μm≤D1≤10 μm. The conductive layer has a thickness of D2 satisfying 200 nm≤D2≤1.5 μm. The insulation layer has a tensile strength greater than or equal to 150 MPa.

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