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.

公开(公告)号：EP3907775A1

公开(公告)日：2021-11-10

申请号：EP19908966.5

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: H01M2/10 ,  H01M10/613 ,  H01M10/625 ,  H01M10/6554 ,  H01M10/6556 ,  H01M10/6568 ,  B60L50/64

Abstract: Provided are a power battery pack and an electric vehicle. The power battery pack includes: a pack body; and a plurality of cells, directly arranged in the pack body. The cell extends from a first side of the pack body to a second side of the pack body, and the first side and the second side are disposed opposite to each other. The first side of the pack body is provided with a first side wall, the second side of the pack body is provided with a second side wall, an end of the cell is supported by the first side wall, and the other end of the cell is supported by the second side wall.

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%.

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.

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.

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).

公开(公告)号：EP3907776A1

公开(公告)日：2021-11-10

申请号：EP19909472.3

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: H01M2/10 ,  H01M10/613 ,  H01M10/625 ,  H01M10/6554 ,  H01M10/6556 ,  H01M10/6568 ,  B60L50/64

Abstract: A battery pack and an electric vehicle are provided. The battery pack includes a housing; and a plurality of cells, provided in the housing, wherein the sum V1 of the volumes of the plurality of cells and the volume V2 of the battery pack satisfy V1/V2≥55%. The battery pack has a first direction and a second direction perpendicular to each other. A length direction of the cell is arranged along the first direction of the battery pack, and the plurality of cells are arranged along the second direction of the battery pack. The cell comprises a cell body, and the length of the cell body is 400-2500 mm.

公开(公告)号：EP3726625A1

公开(公告)日：2020-10-21

申请号：EP18888794.7

申请日：2018-12-13

Applicant: BYD Company Limited

Inventor： HE, Long ,  SHEN, Xi ,  JIANG, Luxia ,  JIANG, Wenfeng

IPC: H01M2/34

Abstract: A battery system and an electric vehicle are disclosed. The battery system includes at least one series circuit, a pouch battery and at least one first cell connected to the pouch battery in series being disposed in the series circuit, and a current interrupt device being disposed on the first cell; and the current interrupt device of the first cell being configured to interrupt an internal current of the first cell when at least one of the pouch battery and the first cell is abnormal.

公开(公告)号：EP3357109B1

公开(公告)日：2020-02-05

申请号：EP16874876.2

申请日：2016-12-15

Applicant: BYD Company Limited

Inventor： FENG, Dali ,  SONG, Wei ,  HU, Jialing ,  JIN, Lina ,  SHAN, Jun ,  HE, Long

IPC: H01M2/14 ,  H01M2/16 ,  D01D5/00 ,  D01F6/74 ,  H01M10/052 ,  D01F6/18 ,  D01F6/76

公开(公告)号：EP3493297A1

公开(公告)日：2019-06-05

申请号：EP17845206.6

申请日：2017-08-14

Applicant: BYD Company Limited

Inventor： HU, Jialing ,  SHAN, Jun ,  WU, Jinxiang ,  HE, Long

IPC: H01M2/16 ,  H01M2/14 ,  H01M10/052

Abstract: The disclosure relates to the field of lithium-ion batteries, and discloses a polymer composite membrane and a method for preparing same. The disclosure further includes a lithium-ion battery for which the foregoing polymer composite membrane is used. The polymer composite membrane includes a porous base membrane and a heat-resistant fiber layer covering at least one side surface of the porous base membrane, where materials of the heat-resistant fiber layer contain a first polymeric material and a second polymeric material.