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    Wound electrode assembly with empty foil segment
    3.
    发明授权
    Wound electrode assembly with empty foil segment 有权

    公开(公告)号：US11329309B2

    公开(公告)日：2022-05-10

    申请号：US17013702

    申请日：2020-09-07

    Applicant: Ningde Amperex Technology Limited

    Inventor： Jing Jiang ,  Liangzhen Xiao

    IPC: H01M10/04 ,  H01M10/0587

    Abstract: A wound electrode assembly, including a first electrode plate including a first current collector and a second electrode plate including a second current collector, wherein the second electrode plate includes a second empty foil segment, the second empty foil segment surrounds the first electrode plate, the second empty foil segment is configured as a tail segment of the second electrode plate, in the second empty foil segment, a surface of the second current collector opposite to the first electrode plate is coated with active substance, a surface of the second current collector away from the first electrode plate is coated with the active substance. The wound electrode assembly to effectively avoids lithium dendrite while improving the utilization of the battery material and the energy density of the battery, thereby improving the safety performance of the battery.

    BATTERY AND DEVICE
    4.
    发明申请
    BATTERY AND DEVICE 审中-公开

    公开(公告)号：US20190319251A1

    公开(公告)日：2019-10-17

    申请号：US16203601

    申请日：2018-11-28

    Applicant: Ningde Amperex Technology Limited

    Inventor： Liangzhen Xiao

    IPC: H01M2/26 ,  H01M10/04

    Abstract: The present application provides a battery including an electrode tab assembly that including an electrode tab and a protective layer arranged on the electrode tab including a first connecting layer arranged outside the protective layer, and a package film including a second connecting layer arranged outside the first connecting layer; after the electrode tab assembly is packaged, a first step and a second step are formed outside the package film, and the first step and the second step have a first thickness h and a second thickness j in a first direction of the battery. An object of the present application is to provide a battery capable of ensuring high sealing strength without leakage and penetration.

    SEPARATOR AND LITHIUM ION BATTERY
    5.
    发明申请
    SEPARATOR AND LITHIUM ION BATTERY 审中-公开

    公开(公告)号：US20190319245A1

    公开(公告)日：2019-10-17

    申请号：US16174385

    申请日：2018-10-30

    Applicant: Ningde Amperex Technology Limited

    Inventor： Liangzhen Xiao ,  Kefei Wang ,  Qiao Zeng

    IPC: H01M2/16 ,  H01M10/0525

    Abstract: The present application provides a separator and a lithium ion battery, the separator comprises a first porous substrate, a second porous substrate and a third porous substrate, wherein the second porous substrate is arranged between the first porous substrate and the third porous substrate, and a tensile strength of the separator in amachine direction is greater than a tensile strength of the separator in a transverse direction. The use of the separator of the present application can improve the thermal stability and safety performance of the lithium ion battery.

    Electrolyte and electrochemical device
    6.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US12107220B2

    公开(公告)日：2024-10-01

    申请号：US18626867

    申请日：2024-04-04

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Kefei Wang ,  Qiao Zeng ,  Liangzhen Xiao ,  Fei Wu

    IPC: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

    CPC classification number: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037

    Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 6, about 30 wt %≤Z≤about 50 wt %, and about 0.01≤(Y/Z)≤about 0.3; wherein the dinitrile compound is one or more compounds selected from adiponitrile, 1,4-dicyano-2-butene, and ethylene glycol bis(2-cyanoethyl) ether; and the trinitrile compound is one or more compounds selected from 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile; 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile; 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane; 1,1,1-tris(cyanoethoxymethylene)ethane; 1,1,1-tris(cyanoethoxymethylene)propane; 3-methyl-1,3,5-tris(cyanoethoxy)pentane; 1,2,7-tris(cyanoethoxy)heptane; 1,2,6-tris(cyanoethoxy)hexane; 1,2,5-tris(cyanoethoxy)pentane; and any combination thereof.

    Wound-type electrode assembly
    8.
    发明授权
    Wound-type electrode assembly 有权

    公开(公告)号：US11658344B2

    公开(公告)日：2023-05-23

    申请号：US16194539

    申请日：2018-11-19

    Applicant: Ningde Amperex Technology Limited

    Inventor： Peipei Guo ,  Liangzhen Xiao ,  Wei Gao ,  Kefei Wang ,  Yi Zhao ,  Ping He

    IPC: H01M10/0587 ,  H01M10/04 ,  H01M50/536 ,  H01M4/70 ,  H01M10/0525

    CPC classification number: H01M10/0587 ,  H01M4/70 ,  H01M10/0431 ,  H01M50/536 ,  H01M10/0525

    Abstract: The present disclosure provides a wound-type electrode assembly comprising a first and second electrode plates, a first and second electrode tabs, and a separator. The first and second electrode plates include a first current collector and active substance layer, and a second current collector and active substance layer. Two surfaces of the first current collector of the first winding start section of the first electrode plate are not coated with first active substance layer and defined as a first start blank current collector, the first start blank current collector is welded to a first electrode tab. The second pole piece comprises a second groove, a bottom of which is a second current collector and a circumference thereof is a second active substance layer; the second electrode tab is accommodated in the second groove and electrically connected to the second current collector at the second groove.

    Electrolyte and electrochemical device
    9.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US10833363B2

    公开(公告)日：2020-11-10

    申请号：US16211853

    申请日：2018-12-06

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Kefei Wang ,  Qiao Zeng ,  Liangzhen Xiao ,  Fei Wu

    IPC: H01M10/0566 ,  H01M10/0525 ,  H01M4/13

    Abstract: The present application relates to an electrolyte and an electrochemical device comprising the electrolyte. The electrolyte comprises a dinitrile compound, a trinitrile compound, and propyl propionate, wherein, based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %≤(X+Y)≤about 11 wt % . . . (1), about 0.1≤(X/Y)≤about 8 . . . (2)}. The electrolyte of the present application is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.

    Wound cell having single-side coated areas
    10.
    发明授权
    Wound cell having single-side coated areas 有权

    公开(公告)号：US10651511B2

    公开(公告)日：2020-05-12

    申请号：US15649820

    申请日：2017-07-14

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Liangzhen Xiao ,  Qiao Zeng ,  Kefei Wang

    IPC: H01M10/0587 ,  H01M10/04 ,  H01M10/0525 ,  H01M10/12 ,  H01M10/14 ,  H01M10/28

    Abstract: Provided is a wound cell, formed by winding of a first and second separator, a first and second electrode plate from start ends thereof, outermost circle of second electrode plate includes second single-side coated area, surface of which facing center of the wound cell is second blank current collector area not coated with second active material, portion of first electrode plate opposite to second blank current collector area includes first single-side coated area, surface of which away from the center of the wound cell is first blank current collector area not coated with first active material; tail end of first electrode plate contains first blank foil area, portion of second electrode plate opposite to first blank foil area contains second blank foil area; start ends of first and second single-side coated area are located at two opposite sides in thickness direction of the cell.

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