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：EP4142025A1

公开(公告)日：2023-03-01

申请号：EP21808008.3

申请日：2021-04-20

Applicant: BYD Company Limited

Inventor： HU, Shichao ,  ZHU, Yan

IPC: H01M50/10 ,  H01M50/20

Abstract: The present disclosure provides a battery core assembly (10), a battery (100), a battery pack (200), and a vehicle (300). The battery core assembly includes an encapsulation film (11) and multiple electrode core assemblies (12) encapsulated in the encapsulation film. The electrode core assemblies are connected in series to form an electrode core string, and the electrode core assembly includes at least one electrode core (121). A first spacer ring (13) is provided between at least two adjacent battery assemblies. The first spacer ring is joined to the encapsulation film to divide an accommodating space inside the encapsulation film into multiple accommodating cavities (110). At least one first spacer ring is provided with at least one first liquid reservoir (132), and each first liquid reservoir communicates with one of the accommodating cavities at both sides of the first spacer ring. Moreover, the present disclosure further provides a battery, a battery pack, and a vehicle based on the battery core assembly provided in the present disclosure.

公开(公告)号：EP4102622A1

公开(公告)日：2022-12-14

申请号：EP21757504.2

申请日：2021-02-07

Applicant: BYD Company Limited

Inventor： YUAN, Wansong ,  ZOU, Xiangda ,  DENG, Dongjun ,  CHEN, Wenhui ,  ZHU, Yan

IPC: H01M50/107 ,  H01M10/625

Abstract: A battery case (100) is provided, including a plurality of side plates. A first side plate (110) has the largest area among the plurality of side plates, and at least one first side plate (110) includes a first portion (111) and a second portion (112). The first portion (111) is a curved surface concave toward inside of the battery case (100). A three-dimensional coordinate system is established in a first direction, a second direction, and a third direction, and the second direction is perpendicular to the first side plate. A curvature of the first portion is less than a curvature of an ellipsoid, the curvature of the ellipsoid is obtained from an ellipsoid function, and the ellipsoid function is: ((x-a)/i) 2 +((y-b)/j) 2 +((z-c)/k) 2 =1, where, a, b, c, i, j, and k are determined according to coordinates of at least four points that are different from each other, and x, y, and z are coordinates of the three directions of the ellipsoid function.

公开(公告)号：EP4068496A1

公开(公告)日：2022-10-05

申请号：EP20907650.4

申请日：2020-10-23

Applicant: BYD Company Limited

Inventor： LU, Peng ,  LU, Zhipei ,  WANG, Xinyue ,  DENG, Dongjun ,  ZHU, Yan

IPC: H01M50/572

Abstract: A cover plate assembly, a battery, a battery module, a power battery pack, and an electric vehicle are disclosed. The cover plate assembly includes a cover plate body (1), a first electrode terminal (2), a second electrode terminal, and a resistive coating (3). The second electrode terminal is insulatively connected with the cover plate body (1). The first electrode terminal (2) is electrically connected with the cover plate body (1) by the resistive coating (3). The resistive coating (3) includes a weak portion (331). When a current flowing through the resistive coating (3) is greater than a predetermined threshold, the weak portion (331) is melted to disconnect the cover plate body (1) from the first electrode terminal (2).

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：EP3905369A1

公开(公告)日：2021-11-03

申请号：EP19902817.6

申请日：2019-07-30

Applicant: BYD Company Limited

Inventor： REN, Zhenghua ,  LU, Zhipei ,  GUO, Kun ,  PENG, Qingbo ,  ZHU, Yan

IPC: H01M2/10

Abstract: The present disclosure relates to a battery tray and a power battery pack. The battery tray includes a tray body. The tray body includes a base plate (10) and a side beam (20), and the side beam (20) is disposed around the base plate (10) and defines, together with the base plate (10), an accommodating space for battery cells (200). The base plate (10) is formed therein with an air passage, and the base plate (10) is provided with several inlet vents (31) and at least one exhaust vent. The inlet vent (31) is configured to introduce a flame, smoke or gas discharged from the battery cell (200) into the air passage, and the exhaust vent is configured to discharge the flame, smoke or gas inside the air passage.

公开(公告)号：EP3565029A1

公开(公告)日：2019-11-06

申请号：EP17888533.1

申请日：2017-07-05

Applicant: BYD Company Limited

Inventor： ZHU, Jianhua ,  LAI, Qing ,  TONG, Zhiwei ,  ZHU, Yan

IPC: H01M2/34

Abstract: A protection device for a battery pack, a battery pack and a vehicle are provided. The battery pack comprises a plurality of batteries. The protection device is disposed between two adjacent batteries and comprises: a first connecting assembly, a second connecting assembly and a conductive connecting assembly. The first connecting assembly is opposite to a first battery in the two adjacent batteries, and the first connecting assembly is adapted to be electrically connected with a housing of the first battery. The second connecting assembly is opposite to a second battery in the two adjacent batteries, the second connecting assembly is adapted to be electrically connected with a housing of the second battery, and the second connecting assembly is opposite to the first connecting assembly. The conductive connecting assembly is used for being electrically connected with terminals of the first battery and the second battery, and is adapted to be electrically connected with the first connecting assembly and the second connecting assembly, respectively, to be configured as an overload protection circuit. The protection device has a normal state and an alarm state. When the protection device is in the normal state, the first connecting assembly and the second connecting assembly are spaced apart, and the overload protection circuit is open. When the protection device is in the alarm state, the first connecting assembly is electrically connected with the housing of the first battery, the second connecting assembly is electrically connected with the housing of the second battery, at least one of the first connecting assembly and the second connecting assembly moves to be electrically connected with each other, and the overload protection circuit is closed.