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    Device for preparing electrode assembly and preparation method of electrode assembly
    34.
    发明授权
    Device for preparing electrode assembly and preparation method of electrode assembly 有权

    公开(公告)号：US11476492B2

    公开(公告)日：2022-10-18

    申请号：US17058463

    申请日：2020-06-02

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Chengdu Liang ,  Yiruo Wang ,  Chao Yang ,  Minghao Tang ,  Xiao Wang ,  Jiang Lin ,  Chuangchuang Xiang

    IPC: H01M10/04

    Abstract: The present application relates to a device for preparing an electrode assembly and a preparation method of the electrode assembly. Wherein the device for preparing the electrode assembly includes: a winding assembly; a plurality of first electrode plate unwinding apparatuses, configured to provide a plurality of first electrode plates for the winding assembly; and at least one second electrode plate unwinding apparatus, configured to provide at least one second electrode plate for the winding assembly, wherein a polarity of the first electrode plate is opposite to a polarity of the second electrode plate; and wherein the winding assembly is configured to wind the plurality of first electrode plates and the at least one second electrode plate, to form an electrode assembly. The present application is used for improving winding efficiency of the electrode assembly.

    Secondary battery, battery module, and device using secondary battery as power source
    36.
    发明授权
    Secondary battery, battery module, and device using secondary battery as power source 有权

    公开(公告)号：US11424500B2

    公开(公告)日：2022-08-23

    申请号：US17120593

    申请日：2020-12-14

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Chengyou Xing ,  Chengdu Liang ,  Ningsheng Wu ,  Wenlong Kang ,  Peng Wang ,  Quankun Li ,  Lingyan Jiang

    IPC: H01M50/116

    Abstract: The present disclosure relates to a secondary battery, a battery module, and a device using the secondary battery as a power source. The secondary battery includes a casing and a top cover for connecting with the casing. The casing includes an end portion provided with an opening. The top cover is used to cover the opening of the casing. The top cover includes an inserting portion extending into the casing from the opening. A plurality of notches are provided on an inner side of the end portion of the casing or on a side wall of the inserting portion facing the casing. In the secondary battery, the battery module, and the device using the secondary battery as a power source according to the present disclosure, the secondary battery can reduce the possibility of short circuit occurring in the electrode assembly and improve the operational safety of the secondary battery.

    Lithium-ion battery and apparatus
    37.
    发明授权
    Lithium-ion battery and apparatus 有权

    公开(公告)号：US11316197B2

    公开(公告)日：2022-04-26

    申请号：US17128581

    申请日：2020-12-21

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Tiancheng Yi ,  Chunhua Hu ,  Yao Jiang ,  Shushi Dou ,  Chengdu Liang

    IPC: H01M10/0567 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D295/15 ,  C07D403/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/02

    Abstract: The present application provides a lithium-ion battery and an apparatus, and the lithium-ion battery includes an electrode assembly and an electrolytic solution, the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separation film. A positive active material of the positive electrode sheet includes Lix1Coy1M1-yO2-z1Qz1, 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolytic solution contains vinylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, and an additive A. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

    Electrolyte and electrochemical device
    38.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US11316195B2

    公开(公告)日：2022-04-26

    申请号：US16343448

    申请日：2017-07-18

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Zijun Xu ,  Chunhua Hu ,  Tiancheng Yi ,  Yingjie Zhan ,  Chengdu Liang

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/42

    Abstract: Energy storage materials, and specifically, an electrolyte and an electrochemical device, where the electrolyte includes an additive A and an additive B, the additive A is selected from multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one sulfonate compound. The electrochemical device includes the above electrolyte. The electrolyte can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, meanwhile the electrolyte can be adsorbed on catalytically active sites of the graphite surface to form a stable SEI film, thereby effectively reducing side reactions. The electrochemical device using the electrolyte has good high temperature and high voltage cycle performance and storage performance.

    Solid electrolyte sheet and preparation method thereof, battery and device including the same
    40.
    发明授权
    Solid electrolyte sheet and preparation method thereof, battery and device including the same 有权

    公开(公告)号：US11217822B2

    公开(公告)日：2022-01-04

    申请号：US16972824

    申请日：2020-06-17

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Chengdu Liang ,  Chengyong Liu ,  Bobing Hu ,  Jiawei Fu ,  Qian Li ,  Meng Cheng ,  Yongsheng Guo

    IPC: H01M10/0562 ,  H01M10/0525 ,  H01M10/0585

    Abstract: The present application provides a preparation method for a solid electrolyte, including: acquiring an initial reaction mixture including a lithium precursor, a central atom ligand and an organic solvent; acquiring a modified solution including a borate ester and the organic solvent; mixing the initial reaction mixture and the modified solution, and drying to acquire an initial product; performing a grinding, cold press and heat treatment to the initial product to obtain the solid electrolyte. In the preparation method provided by the present application, a B and O co-doped sulphide solid electrolyte can be obtained by modifying the sulphide solid electrolyte with the borate ester as a doping raw material. The ionic conductivity of the prepared sulphide solid electrolyte is significantly improved, which is also conducive to improvement of energy density of the all-solid-state batteries.

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