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    END COVER ASSEMBLY AND LITHIUM SECONDARY BATTERY HAVING THE SAME
    42.
    发明公开
    END COVER ASSEMBLY AND LITHIUM SECONDARY BATTERY HAVING THE SAME 审中-公开
    端盖和锂二次电池

    公开(公告)号：EP2377183A1

    公开(公告)日：2011-10-19

    申请号：EP10740917.9

    申请日：2010-02-09

    Applicant: Shanghai BYD Company Limited

    Inventor： CHE, Guoyong ,  SUN, Huajun

    IPC: H01M2/04 ,  H01M10/0525

    CPC classification number: H01M2/348 ,  H01M2/0413 ,  H01M2/1241 ,  H01M2200/00 ,  H01M2200/10 ,  H01M2200/106

    Abstract: An end cover assembly (100) for a lithium secondary battery is provided. The assembly (100) comprises: a sealing member (2) having an accommodating portion (21) therein for accommodating an upper cap (1), a thermal-sensitive member (7) disposed under the upper cap (1), and a metal bottom plate (6) disposed under the thermal sensitive member (7). A skirt portion (61) of the metal bottom plate (6) is flanged upwardly to wrap the thermal-sensitive member (7) and the upper cap (1) respectively with an insulating member (8) being disposed between the upper cap (1) and the metal bottom plate (6) for preventing the upper cap (1) from electrically contacting the metal bottom plate (6). Further, a lithium ion battery (200) having the end cover assembly (100) as described above is provided.

    LITHIUM BATTERY AND PREPARATION METHOD THEREFOR, CHARGING METHOD, AND POWER VEHICLE
    47.
    发明公开
    LITHIUM BATTERY AND PREPARATION METHOD THEREFOR, CHARGING METHOD, AND POWER VEHICLE 审中-实审

    公开(公告)号：EP4345943A1

    公开(公告)日：2024-04-03

    申请号：EP22831582.6

    申请日：2022-05-30

    Applicant: BYD Company Limited

    Inventor： PAN, Yi ,  MA, Yongjun ,  GUO, Zizhu ,  WANG, Liangjun ,  SUN, Huajun

    IPC: H01M4/134 ,  H01M10/052 ,  H01M10/44

    Abstract: The present disclosure a lithium battery and a preparation method thereof, a charging method and a powered vehicle. The lithium battery includes a positive electrode plate, a negative electrode plate, a separator located between the positive electrode plate and the negative electrode plate, and an electrolyte solution. The negative electrode material layer of the negative electrode plate includes a lithium-silicon composite negative electrode active material. The negative electrode material layer has a protective layer on the surface or the lithium-silicon composite negative electrode active material has a protective layer on the surface. The protective layer includes a polymer matrix and a lithium salt. When the lithium battery is fully charged, the lithium-silicon composite negative electrode active material includes elemental lithium and a lithium-silicon alloy Li 4.4 Si, and the elemental lithium accounts for 15%-95% by mole of the lithium-silicon composite negative electrode active material.

    POWER BATTERY PACK AND ELECTRIC VEHICLE
    48.
    发明公开
    POWER BATTERY PACK AND ELECTRIC VEHICLE 审中-公开

    公开(公告)号：EP4343941A2

    公开(公告)日：2024-03-27

    申请号：EP23220492.5

    申请日：2019-06-21

    Applicant: BYD Company Limited

    Inventor： HE, Long ,  SUN, Huajun ,  JIANG, Wenfeng ,  LU, Zhipei ,  ZHENG, Weixin ,  TANG, Jianglong ,  ZHU, Yan ,  WANG, Xinyue ,  HE, Kefeng

    IPC: H01M50/249

    Abstract: Provided are a power battery pack and an electric vehicle. The power battery pack includes: a pack body, where an accommodating space is defined in the pack body, the pack body is provided therein with at least one widthwise cross beam or lengthwise cross beam, the widthwise cross beam extends along a width direction of the power battery pack, the lengthwise cross beam extends along a length direction of the power battery pack, and the accommodating space is divided into a plurality of accommodating chambers by the at least one widthwise cross beam or lengthwise cross beam; and a plurality of cells, disposed in the pack body and directly arranged in the accommodating chambers, where at least one cell is arranged in each accommodating chamber to form a cell array. The power battery pack according to the embodiments of this application has advantages of high space utilization, large energy density, long battery life, high reliability, low costs, high quality, and the like.

    BATTERY PACK AND ELECTRIC VEHICLE
    49.
    发明公开
    BATTERY PACK AND ELECTRIC VEHICLE 审中-公开

    公开(公告)号：EP4329081A2

    公开(公告)日：2024-02-28

    申请号：EP23214628.2

    申请日：2020-10-29

    Applicant: BYD Company Limited

    Inventor： SUN, Huajun ,  LU, Zhipei ,  PENG, Qingbo ,  WAN, Long ,  ZHU, Yan

    IPC: H01M50/502

    Abstract: The present disclosure provides a battery pack and an electric vehicle. The battery pack includes a sealed housing, and at least one housing structural beam and multiple electrode core strings electrically connected to one another located in the housing. The housing includes a housing body, including a top plate and a bottom plate arranged opposite to each other in a first direction. The structural beam is located between the top plate and the bottom plate, the at least one structural beam divides the interior of the housing into multiple accommodating cavities, the at least one structural beam is connected to the top plate and the bottom plate, and at least one electrode core string is provided in at least one accommodating cavity. An atmospheric pressure in the accommodating cavity is lower than an atmospheric pressure outside the housing. A mounting portion is provided on the housing, and the mounting portion is configured to be connected and fixed to an external load. The electrode core string includes multiple electrode core assemblies sequentially disposed in a second direction and connected in series. The electrode core assembly is encapsulated in an encapsulation film. A length direction of the electrode core string extends in the second direction.

    BATTERY PACK, VEHICLE, AND ENERGY STORAGE DEVICE
    50.
    发明公开
    BATTERY PACK, VEHICLE, AND ENERGY STORAGE DEVICE 审中-公开

    公开(公告)号：EP4329067A2

    公开(公告)日：2024-02-28

    申请号：EP23220826.4

    申请日：2019-06-21

    Applicant: BYD Company Limited

    Inventor： HE, Long ,  SUN, Huajun ,  JIANG, Wenfeng ,  LU, Zhipei ,  ZHENG, Weixin ,  TANG, Jianglong ,  ZHU, Yan ,  WANG, Xinyue ,  HE, Kefeng

    IPC: H01M50/249

    Abstract: The invention basically relates to a battery pack, comprising a cell array and a support member, wherein the cell array comprises a plurality of cells, at least one of the cells comprises a cell body and electrode terminals extending out of the cell body and configured to output a current inside the cell body, the at least one cell comprises a casing and a core located inside the casing, a supporting region is formed on the casing, and the cell is connected to the support member through the supporting region and is supported by the support member the cell body being substantially a cuboid with a length L, 600 mm≤L≤2500 mm, a thickness D, and a height H; the length L of the cell body being greater than or equal to the height H of the cell body and the height H of the cell body being greater than or equal to the thickness D of the cell body, wherein the cell meets 4≤L/H≤21 and 23≤L/D≤208.

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