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    ELECTRODE PLATE AND ELECTROCHEMICAL DEVICE
    61.
    发明申请
    ELECTRODE PLATE AND ELECTROCHEMICAL DEVICE 有权

    公开(公告)号：US20210296654A1

    公开(公告)日：2021-09-23

    申请号：US17335034

    申请日：2021-05-31

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Chengdu Liang ,  Jing Li ,  Wei Li ,  Qingrui Xue ,  Zige Zhang ,  Yang Zhang

    IPC: H01M4/66 ,  H01M4/62

    Abstract: The electrode plate according to the present application includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, wherein the current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer, the conductive layer has a single-sided thickness D2 satisfying: 30 nm≤D2≤3 μm; and a conductive primer layer containing a first conductive material and a binder is provided between the current collector and the electrode active material layer, and the first conductive material in the conductive primer layer comprises at least one of a one-dimensional conductive material and a two-dimensional conductive material. The electrode plate of the present application has good workability, and the electrochemical device including the electrode plate has high energy density, good electrical performance and long-term reliability.

    Electrolyte and battery
    62.
    发明授权
    Electrolyte and battery 有权

    公开(公告)号：US11121406B2

    公开(公告)日：2021-09-14

    申请号：US16357549

    申请日：2019-03-19

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Shushi Dou ,  Chunhua Hu ,  Tiancheng Yi ,  Zijun Xu ,  Chengdu Liang

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569

    Abstract: This application provides an electrolyte and a battery. The electrolyte comprises an electrolytic salt and an organic solvent comprising a cyclic carbonate and a chain carbonate. The electrolyte further comprises an additive A and an additive B, wherein the additive A is a positive-electrode film-forming additive, the additive B is a negative-electrode film-forming additive, and the reduction potential of the additive B is higher than that of the cyclic carbonate, and the electrolyte has a conductivity of 6 mS/cm to 10 mS/cm at 25° C. The electrolyte of the present application can improve the cycle performance and storage performance of the battery, in particular, improve the cycle performance and storage performance of the battery under high temperature and high voltage conditions, and at the same time balance the low-temperature performance of the battery.

    Secondary battery, battery pack and device using battery
    63.
    发明授权
    Secondary battery, battery pack and device using battery 有权

    公开(公告)号：US11114716B1

    公开(公告)日：2021-09-07

    申请号：US17136786

    申请日：2020-12-29

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Xinxiang Chen ,  Peng Wang ,  Yuanbao Chen ,  Zhijun Guo ,  Yulian Zheng ,  Chengdu Liang ,  Wei Li

    IPC: H01M50/148 ,  H01M50/183 ,  H01M10/058 ,  H01M50/636 ,  H01M10/0525

    Abstract: A secondary battery, a battery pack and a device using the battery are provided, wherein the end cover assembly includes: an end cover with a through hole for injection of electrolyte and an accommodating part, the accommodating part is arranged on a side far away from a shell of the end cover and is arranged along a circumferential direction of the through hole; a sealing element; and a cover body for covering at least part of the sealing element, the cover body is rotatable and includes a limiting part; when the cover body rotates to a first position, the limiting part is located inside the accommodating part to limit separation of the cover body from the end cover; when the cover body rotates to a second position, the limiting part and the accommodating part are misplaced to realize separation of the cover body from the end cover.

    Secondary battery and electrode member thereof
    64.
    发明授权
    Secondary battery and electrode member thereof 有权

    公开(公告)号：US11101493B2

    公开(公告)日：2021-08-24

    申请号：US16268364

    申请日：2019-02-05

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Chengdu Liang ,  Zige Zhang ,  Qingrui Xue ,  Wei Li ,  Jing Li ,  Pengxiang Wang

    IPC: H01M10/04 ,  H01M2/02 ,  H01M50/116

    Abstract: The present disclosure provides a secondary battery and an electrode plate thereof. The electrode member comprises an insulating substrate, a first conducting layer and an active material layer; the first conducting layer is provided on a surface of the insulating substrate, the active material layer is provided at a side of the first conducting layer away from the insulating substrate; the first conducting layer is provided with a stripe-shape groove extending in a height direction, the stripe-shape groove is used for releasing stress of the first conducting layer. The secondary battery comprises an electrode assembly, the electrode assembly comprises the electrode member.

    Current collector, electrode plate of the same and battery
    65.
    发明授权
    Current collector, electrode plate of the same and battery 有权

    公开(公告)号：US11024854B2

    公开(公告)日：2021-06-01

    申请号：US16209425

    申请日：2018-12-04

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang

    IPC: H01M4/66 ,  H01M2/34 ,  H01M10/48 ,  H01M10/0525 ,  H01M10/052 ,  H01M10/42 ,  H01M4/64 ,  H01M50/581

    Abstract: The present application relates to a current collector, an electrode plate, a battery and usages thereof. The current collector includes at least one conductive layer configured to support an electrode active material layer, and an insulation layer configured to support the at least one conductive layer. The conductive layer has a room temperature film resistance RS satisfying 0.01Ω/□≤RS≤0.15Ω/□. The current collector can significantly increase resistance in short-circuit and reduce current in the short-circuit, and reduce heat generated during the short-circuit and improving safety performance. The heat can be totally absorbed by the battery. Therefore, the resulted temperature rise of the battery is small, the damage to the battery caused by the short circuit can be limited to a “point”, and only a “point break” is formed, without influencing normal operation of the battery in a short time.

    Positive electrode plate and electrochemical battery
    67.
    发明授权
    Positive electrode plate and electrochemical battery 有权

    公开(公告)号：US10892473B2

    公开(公告)日：2021-01-12

    申请号：US16152199

    申请日：2018-10-04

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Ying Wang ,  Yongsheng Guo ,  Chengdu Liang ,  Xiqing Wang ,  Shuojian Su ,  Qian Liu

    IPC: H01M4/00 ,  H01M4/136 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/02 ,  H01M10/054

    Abstract: The present disclosure provides a positive electrode plate and an electrochemical battery. The positive electrode plate comprises a positive electrode current collector and a positive electrode film. The positive electrode film is provided on the positive electrode current collector and comprises a positive electrode active material and a binder. The positive electrode active material comprises a prussian blue analogue material, the binder is an oil-soluble binder, an area density of the positive electrode film is 5 mg/cm2˜30 mg/cm2. In the positive electrode film of the present disclosure, the prussian blue analogue material is used together with the oil-soluble binder, and the area density of the positive electrode film is controlled within a certain range, so that introduction of the water molecule can be reduced during the preparation process and coating process of a positive electrode slurry, and cycle performance of the electrochemical battery can be improved.

    Electrolyte and battery
    68.
    发明授权
    Electrolyte and battery 有权

    公开(公告)号：US10862170B2

    公开(公告)日：2020-12-08

    申请号：US16343326

    申请日：2017-07-18

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Tiancheng Yi ,  Chunhua Hu ,  Li Hao ,  Yingjie Zhan ,  Chengdu Liang

    IPC: H01M10/0567 ,  H01M10/0525

    Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and a battery using the electrolyte. The electrolyte contains an additive selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof. The addition of the multi-cyano six-membered N-heterocyclic compound as an additive in the electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material and inhibit oxidation of the electrolyte. The battery using the electrolyte according the present disclosure has good cycle performance at high temperature and high voltage and good storage performance, while gas production of the battery is reduced.

    ELECTROLYTE AND ELECTROCHEMICAL DEVICE
    69.
    发明申请
    ELECTROLYTE AND ELECTROCHEMICAL DEVICE 审中-公开

    公开(公告)号：US20190326634A1

    公开(公告)日：2019-10-24

    申请号：US16370973

    申请日：2019-03-30

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Tiancheng Yi ,  Chunhua Hu ,  Lu Miao ,  Zijun Xu ,  Chengdu Liang

    IPC: H01M10/0567

    Abstract: This application provides an electrolyte and an electrochemical device, wherein the electrolyte comprises an additive A and an additive B, the additive A is present in an amount of 0.001% to 10% by mass in the electrolyte, and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte. This application can improve the cycle performance and storage performance of the electrochemical device, especially the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions.

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