公开(公告)号：EP4160753A1

公开(公告)日：2023-04-05

申请号：EP21814514.2

申请日：2021-05-24

Applicant: BYD Company Limited

Inventor： SUN, Huajun ,  WANG, Gaowu ,  LIN, Wensheng ,  ZHAO, Ling ,  ZHU, Yan

IPC: H01M4/66 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0587

Abstract: The present disclosure provides a lithium ion battery, a power battery module, a battery pack, an electric vehicle and an energy storage device. The lithium ion battery includes a casing and an electrode core packaged in the casing. The electrode core includes a positive electrode sheet, a negative electrode sheet, and a separator located between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode material layer loaded on the positive electrode current collector. Among the positive electrode current collector, the positive electrode material layer, the negative electrode sheet, and the separator, the one with the lowest melting point is defined as an effective component. The effective component meets: 1 ≤ d 2 ρ C p × 1.12 nL n + 1 W ≤ 500 .

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：EP4057440A1

公开(公告)日：2022-09-14

申请号：EP20890941.6

申请日：2020-11-19

Applicant: BYD Company Limited

Inventor： SUN, Huajun ,  ZHU, Yan ,  WANG, Xinyue

IPC: H01M50/636 ,  H01M10/04

Abstract: This application provides a battery (100), which comprises a housing (1) and a plurality of accommodating cavities (11) located in the housing (1), wherein two adjacent accommodating cavities (11) are isolated by a partition plate, an electrode core assembly (2) comprising at least one electrode core is arranged in the accommodating cavity (11), and a plurality of electrode core assemblies (2) are sequentially arranged along a first direction and connected in series. A liquid guide hole and a gas guide hole are provided on the partition plate, wherein the liquid guide hole and the gas guide hole are used to bring two adjacent accommodating cavities (11) at both sides of the partition plate into communication. The battery (100) also includes a blocking mechanism that enables the liquid guide hole to be in a settable state comprising an open state and a closed state.

公开(公告)号：EP3933955A1

公开(公告)日：2022-01-05

申请号：EP19919444.0

申请日：2019-07-25

Applicant: BYD Company Limited

Inventor： SUN, Huajun ,  LU, Zhipei ,  TANG, Jianglong ,  JIANG, Wenfeng ,  ZHU, Yan

IPC: H01M2/10

Abstract: The present disclosure relates to a power battery pack, an energy storage device, an electric vehicle. The power battery pack includes an accommodating device (200) and a plurality of cells (100), the accommodating device (200) includes a plurality of accommodating regions, and each accommodating region has a first side edge (201) and a second side edge (202) and cells (100) disposed between the first side edge and the second side edge. A distance between the first side edge (201) and the second side edge (202) along a first direction varies with different accommodating regions, each cell (100) includes a first end and a second end, and a distance between the first end and the second end matches a distance between a corresponding first side edge (201) and a corresponding second side edge (202).

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：EP2628204B1

公开(公告)日：2018-06-06

申请号：EP11832049.8

申请日：2011-10-13

Applicant: Shenzhen BYD Auto R&D Company Limited ,  BYD Company Limited

Inventor： WU, Guanglin ,  SUN, Huajun ,  PAN, Liying

IPC: H01M2/30 ,  H01M2/32 ,  H01M2/06 ,  H01M10/0525

CPC classification number: H01M2/06 ,  H01M2/30 ,  H01M2/32 ,  H01M10/0525 ,  H01M2200/103 ,  H01M2200/106

Abstract: A battery comprise: a housing made by a metal or a metal alloy; a battery core in the housing comprising a positive plate, a separator and a negative plate; an electrolyte in the housing; a cover assembly having a positive terminal electrically connected with the positive plate and a negative terminal electrically connected with the negative plate; and a protection component to prevent the housing from being corroded by the electrolyte.

公开(公告)号：EP4550439A1

公开(公告)日：2025-05-07

申请号：EP23830371.3

申请日：2023-06-28

Applicant: BYD Company Limited

Inventor： SUN, Huajun ,  YUAN, Xiaotao ,  HE, Kefeng ,  XU, Zhan ,  GE, Liping

IPC: H01M4/13

Abstract: A secondary battery electrode plate and a preparation method therefor, and a secondary battery. The secondary battery electrode plate comprises a current collector and a first active material layer, wherein the first active material layer is located on a surface of the current collector and contains first active substance particles, and the first active substance particles have an equivalent sphericity X 1 as represented by formula X 1 = 3/(S 1 R 1 ρ 1 ), where 0.05 ≤ X 1 ≤ 0.8; R 1 is the median radius of the first active substance particles in the unit of µm; S 1 is the specific surface area of the first active substance particles in the unit of m 2 /g; and ρ 1 is the true density of the first active substance particles in the unit of g/cm 3 .

公开(公告)号：EP4503201A1

公开(公告)日：2025-02-05

申请号：EP23826443.6

申请日：2023-06-20

Applicant: BYD Company Limited

Inventor： GUO, Zizhu ,  HAN, Xiaoyan ,  MA, Yongjun ,  PAN, Yi ,  SUN, Huajun

IPC: H01M4/62 ,  H01M4/13

Abstract: The present application discloses a negative electrode sheet, a secondary battery, and an electrical device. The negative electrode sheet comprises a negative current collector and a negative electrode active material layer; the negative electrode active material layer is disposed on the surface of the negative current collector; the negative electrode active material layer comprises a negative electrode active material and an additive having compression and rebound properties; after the pressure X is applied in the thickness direction of the negative electrode sheet, the rebound rate of the negative electrode sheet is 2%-40%, and the compression rate of the negative electrode sheet is 2%-40%; and the pressure X satisfies the following: 0.3 Mpa≤X≤5 Mpa.

公开(公告)号：EP4329081A3

公开(公告)日：2024-04-10

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: H01M50/10 ,  H01M50/105 ,  H01M10/625 ,  H01M10/6557 ,  H01M50/207 ,  H01M50/209 ,  H01M50/211 ,  H01M50/224 ,  H01M50/244 ,  H01M50/249 ,  H01M50/30 ,  H01M50/367 ,  B60L50/64 ,  H01M10/613 ,  H01M10/6555 ,  H01M50/242 ,  H01M50/276 ,  H01M50/588 ,  H01M50/593 ,  H01M50/502 ,  B60L58/26

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.

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.