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    POSITIVE CURRENT COLLECTOR, POSITIVE PLATE, ELECTROCHEMICAL DEVICE AND APPARATUS
    1.
    发明申请
    POSITIVE CURRENT COLLECTOR, POSITIVE PLATE, ELECTROCHEMICAL DEVICE AND APPARATUS 有权

    公开(公告)号：US20220123322A1

    公开(公告)日：2022-04-21

    申请号：US17645499

    申请日：2021-12-22

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Chengdu LIANG ,  Qisen HUANG ,  Shiwen WANG

    IPC: H01M4/66

    Abstract: Positive current collector, positive plate, electrochemical device and apparatus are disclosed. The positive current collector includes a support layer and a metal conductive layer disposed on the support layer, where a ratio of a density of the metal conductive layer to an intrinsic density of a material of the metal conductive layer is greater than or equal to 0.89, and the material of the metal conductive layer is selected from one or more of aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy. The positive current collector can provide simultaneously both low weight and high electrical performance, thus enabling the electrochemical device to achieve both high weight energy density and electrochemical performance at the same time.

    LITHIUM ION SECONDARY BATTERY, BATTERY CORE, NEGATIVE ELECTRODE PLATE, AND APPARATUS
    2.
    发明申请
    LITHIUM ION SECONDARY BATTERY, BATTERY CORE, NEGATIVE ELECTRODE PLATE, AND APPARATUS 有权

    公开(公告)号：US20210151770A1

    公开(公告)日：2021-05-20

    申请号：US17128090

    申请日：2020-12-19

    Applicant: Contemporary Amperex Technology Co., Limited

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

    IPC: H01M4/66 ,  H01M10/0525 ,  H01M4/04

    Abstract: The present disclosure provides a lithium ion secondary battery, a battery core, a negative electrode plate and an apparatus containing the lithium ion secondary battery. The lithium ion secondary battery includes a battery core and an electrolytic solution, the battery core including a positive electrode plate comprising a positive current collector and a positive active material layer, a separator, and a negative electrode plate comprising a negative current collector and a negative active material layer, wherein the positive current collector and/or the negative current collector are a composite current collector, the composite current collector comprises a polymer-based support layer and a conductive layer disposed on at least one surface of the support layer, and the composite current collector has a thermal conductivity in a range of 0.01 W/(m·K) to 10 W/(m·K), preferably in a range of 0.1 W/(m·K) to 2 W/(m·K).

    Separator, Method For Preparing Separator And Electrochemical Device Containing Separator
    5.
    发明申请
    Separator, Method For Preparing Separator And Electrochemical Device Containing Separator 审中-公开

    公开(公告)号：US20190207191A1

    公开(公告)日：2019-07-04

    申请号：US16211526

    申请日：2018-12-06

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Huafeng HUANG ,  Qisen HUANG ,  Shiwen WANG ,  Chengdu LIANG

    IPC: H01M2/16 ,  H01M2/14 ,  C23C14/00 ,  C23C14/08 ,  C23C14/28 ,  C23C14/02 ,  H01M10/0525

    Abstract: A separator, a method for preparing the separator, and an electrochemical device containing the separator. The separator includes a substrate and an inorganic layer disposed on at least one side of the substrate. The substrate is a porous substrate. The inorganic layer is a dielectric layer containing no binder. The inorganic layer has a thickness of 20 nm to 2000 nm. A mass of the inorganic layer is M1, a mass of the substrate is M2, and M1/M2 is greater than or equal to 0.05 but smaller than or equal to 7.5. An interfacial peeling force between the inorganic layer and the substrate is not smaller than 30 N/m. The interfacial wettability and thermal shrinkage resistance performance of the separator are effectively improved while the separator has a certain mechanical strength. The separator can have favorable mechanical strength and thermal shrinkage percentage and high energy density.

    NEGATIVE ELECTRODE CURRENT COLLECTOR, NEGATIVE ELECTRODE PLATE AND ELECTROCHEMICAL DEVICE
    7.
    发明申请
    NEGATIVE ELECTRODE CURRENT COLLECTOR, NEGATIVE ELECTRODE PLATE AND ELECTROCHEMICAL DEVICE 有权

    公开(公告)号：US20220085380A1

    公开(公告)日：2022-03-17

    申请号：US17537516

    申请日：2021-11-30

    Applicant: Contemporary Amperex Technology Co., Limited

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

    IPC: H01M4/66 ,  H01M4/02

    Abstract: The present application discloses a negative electrode current collector, a negative electrode plate and an electrochemical device. The negative electrode current collector includes an organic support layer and a copper-based conductive layer disposed on at least one surface of the organic support layer; and a copper-based crystal grain size in the copper-based conductive layer is from 10 nm to 500 nm. The negative electrode current collector provided by the present application has good mechanics properties while having less weight and good electrical conductivity and current collection performance, which can improve preparation yields of the negative electrode current collector, the negative electrode plate and the electrochemical device and their safety and reliability during use, and enables the electrochemical device to have relatively high gravimetric energy density and good electrochemical performance.

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