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    POWER BATTERY PACK AND ELECTRIC VEHICLE
    3.
    发明公开
    POWER BATTERY PACK AND ELECTRIC VEHICLE 审中-公开

    公开(公告)号：EP4329057A2

    公开(公告)日：2024-02-28

    申请号：EP23220824.9

    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: H01M50/103

    Abstract: The present invention basically relates to a power battery pack, configured to provide power for an electric vehicle and comprising: a pack body; a plurality of cells, disposed in the pack body, the cell having a length L 0 , a width H 0 , and a thickness D 0 , wherein L 0 >H 0 ≥D 0 ; when the power battery pack is placed on the electric vehicle, a length direction of the cell extends along a width direction or a length direction of the electric vehicle; when the length direction of the cell extends along the width direction of the electric vehicle, the length L 0 of the cell and a size W of a vehicle body of the electric vehicle in the width direction meet: 46%≤L 0 /W≤76%; or when the length direction of the cell extends along the length direction of the electric vehicle, the length L 0 of the cell and a size X of the vehicle body of the electric vehicle in the length direction meet: 40%≤L 0 /X≤76%, at least one of the cells, comprising a battery body, the battery body having a length L, a width H, a thickness D, and a volume V, the length L of the battery body being greater than the width H, and the width H of the battery body being greater than the thickness D, wherein the battery body meets: 400mm≤L≤2500mm and H/V=0.0001 mm -2 to 0.00015 mm -2 .

    BATTERY PACK AND ELECTRIC VEHICLE
    4.
    发明公开
    BATTERY PACK AND ELECTRIC VEHICLE 审中-公开

    公开(公告)号：EP4060794A1

    公开(公告)日：2022-09-21

    申请号：EP20890804.6

    申请日：2020-10-19

    Applicant: BYD Company Limited

    Inventor： HE, Long ,  SUN, Huajun ,  ZHU, Yan ,  TAN, Liangwen ,  WAN, Long

    IPC: H01M50/10 ,  H01M50/242

    Abstract: A battery pack and an electric vehicle are provided. The battery pack includes a casing and a battery assembly arranged inside the casing. The battery assembly includes a battery unit and a reinforcing member. The battery unit includes N cells. At least some of the cells in the battery unit are connected by M reinforcing members. An outer surface of each of the cells includes a bottom surface, a top surface, and side surfaces. The bottom surface of the cell faces a bottom surface of the casing. The side surfaces include a first side surface and two opposite second side surfaces. The first side surface has a largest area among the side surfaces. An area of the first side surface is greater than an area of the bottom surface and the area of the first side surface is greater than an area of the top surface. The N cells are arranged in sequence. The second side surfaces of two adjacent cells are arranged opposite to each other. The reinforcing member is fixedly bonded to the first side surface of each cell in Q adjacent cells. N>Q≥2.

    BATTERY SEPARATOR AND LITHIUM ION BATTERY AND PREPARATION METHOD OF SAME
    6.
    发明公开
    BATTERY SEPARATOR AND LITHIUM ION BATTERY AND PREPARATION METHOD OF SAME 审中-公开

    公开(公告)号：EP3490032A1

    公开(公告)日：2019-05-29

    申请号：EP17845213.2

    申请日：2017-08-15

    Applicant: BYD Company Limited

    Inventor： JIN, Lina ,  SHAN, Jun ,  HU, Gang ,  HE, Long

    IPC: H01M2/14

    Abstract: The present disclosure relates to the field of lithium-ion batteries, and discloses a battery separator and a lithium-ion battery, and preparation methods thereof. The battery separator includes a porous base membrane and a bonding layer attached to at least one side surface of the porous base membrane, wherein the bonding layer contains an acrylate crosslinked polymer and a styrene-acrylate crosslinked copolymer and/or a vinylidene fluoride-hexafluoropropylene copolymer, and the porosity of the bonding layer is 40-65%.

    POWER BATTERY PACK AND ELECTRIC VEHICLE
    7.
    发明公开
    POWER BATTERY PACK AND ELECTRIC VEHICLE 审中-公开

    公开(公告)号：EP4343942A2

    公开(公告)日：2024-03-27

    申请号：EP23220620.1

    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.

    POWER BATTERY HEATING METHOD FOR ELECTRIC AUTOMOBILE, DEVICE, AND AUTOMOBILE
    8.
    发明公开
    POWER BATTERY HEATING METHOD FOR ELECTRIC AUTOMOBILE, DEVICE, AND AUTOMOBILE 审中-公开

    公开(公告)号：EP4155120A1

    公开(公告)日：2023-03-29

    申请号：EP21814346.9

    申请日：2021-05-25

    Applicant: BYD Company Limited

    Inventor： HE, Long ,  DENG, Linwang ,  FENG, Tianyu ,  LIU, Sijia

    IPC: B60L58/27 ,  B60L58/00 ,  B60L58/10 ,  B60L58/24 ,  H01M10/615 ,  H01M10/625 ,  H01M10/6571 ,  H01M10/637

    Abstract: The present disclosure discloses a power battery heating method and device for an electric vehicle and a vehicle. The method includes: acquiring a heating power demand of a power battery; acquiring power demand information of a driving module of the electric vehicle in real time, and determining a current heating power of the power battery according to the power demand information; acquiring a compensating heating current according to the heating power demand and the current heating power when the current heating power is less than the heating power demand; causing, during control of the driving motor to drive the electric vehicle into operation according to the power demand information by the motor controller, the motor controller to regulate a control current of the driving motor according to the compensating heating current, so that the driving motor outputs a high-frequency oscillation current equal to the compensating heating current; and causing the power battery to perform self-heating according to the high-frequency oscillation current outputted by the driving motor. According to the present disclosure, the high-frequency oscillation current outputted by the driving motor is increased to satisfy a self-heating demand of the power battery while it is ensured that the power demand information is satisfied, thereby improving the heating rate and efficiency.

    BATTERY, BATTERY MODULE, BATTERY PACK, AND ELECTRIC VEHICLE
    9.
    发明公开
    BATTERY, BATTERY MODULE, BATTERY PACK, AND ELECTRIC VEHICLE 审中-公开

    公开(公告)号：EP4084203A1

    公开(公告)日：2022-11-02

    申请号：EP21741556.1

    申请日：2021-01-04

    Applicant: BYD Company Limited

    Inventor： HE, Long ,  SUN, Huajun ,  HU, Shichao ,  YUAN, Wansong ,  ZHU, Yan

    IPC: H01M50/242

    Abstract: A battery, a battery module, a battery pack, and an electric vehicle are provided. The battery includes a metal shell (11) and a plurality of electrode core assemblies (12) sealed in the metal shell (11) and arranged in sequence. The electrode core assemblies (12) are connected in series. Each of the electrode core assemblies (12) includes at least one electrode core. The electrode core assemblies (12) are sealed in a packaging film (13). An air pressure between the metal shell (11) and the packaging film (13) is lower than an air pressure outside the metal shell (11). An air pressure inside the packaging film (13) is lower than the air pressure between the metal shell (11) and the packaging film (13).

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