公开(公告)号：EP4311008A2

公开(公告)日：2024-01-24

申请号：EP23214631.6

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

公开(公告)号：EP4160766A1

公开(公告)日：2023-04-05

申请号：EP21812612.6

申请日：2021-05-24

Applicant: BYD Company Limited

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

IPC: H01M10/0525

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: 80 d 2 ρ C p × 1.12 nL n + 1 W + 1.35 L W + 0.337 n + 4.49 2000 .

公开(公告)号：EP4160752A1

公开(公告)日：2023-04-05

申请号：EP21811877.6

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: 3 ≤ A = d 2 ρ C p × 1.35 L W ≤ 850 .

公开(公告)号：EP4156388A1

公开(公告)日：2023-03-29

申请号：EP20936964.4

申请日：2020-11-11

Applicant: BYD Company Limited

Inventor： WANG, Xiaopeng ,  PENG, Qingbo ,  LU, Zhipei ,  ZHU, Jianhua ,  ZHU, Yan

IPC: H01M50/112

Abstract: The present disclosure provides a battery pack housing, a battery pack, and an electric vehicle. The housing includes a housing body, where the housing body includes multiple connected sub-housings, and at least one sub-housing is provided with at least one reinforcing plate therein. The sub-housing includes a top plate and a bottom plate arranged opposite to each other in a first direction, where the first direction is a height direction of the housing. The reinforcing plate is located between the top plate and the bottom plate, the at least one reinforcing plate is connected to the top plate and the bottom plate, and the at least one reinforcing plate divides the interior of a corresponding sub-housing into multiple accommodating cavities. A mounting portion is provided on the housing, which is configured to be connected and fixed to an external load. The battery pack housing according to the present disclosure has high structural strength, high space utilization rate, simple structure, high assembly efficiency, and high versatility.

公开(公告)号：EP4148895A1

公开(公告)日：2023-03-15

申请号：EP21808919.1

申请日：2021-04-16

Applicant: BYD Company Limited

Inventor： HU, Shichao ,  ZHANG, Mingming ,  ZHU, Yan

IPC: H01M50/51 ,  H01M50/593

Abstract: The present disclosure provides a battery, a battery pack and a vehicle. The battery includes a housing and multiple electrode core assemblies packaged in the housing. Each of the electrode core assemblies includes a packing film and at least one electrode core, and the at least one electrode core is located in an accommodating cavity defined by the packing film. A spacer is arranged between every two of the electrode core assemblies connected in series. Each of the electrode core assemblies includes a first electrode and a second electrode. The first electrode and the second electrode extend out of the packing film. The first electrode of one electrode core assembly of the every two of the electrode core assemblies connected in series is connected to the second electrode of the other electrode core assembly, and a connecting portion between the first electrode and the second electrode correspondingly connected is accommodated in a through hole. The spacer includes an outer circumferential surface facing an inner surface of the housing. At least one first positioning portion is formed on the outer circumferential surface of the spacer, at least one second positioning portion corresponding one-to-one to the at least one first positioning portion is formed on the inner surface of the housing, and the at least one first positioning portion is engaged with the corresponding at least one second positioning portion to fix the spacer and the housing.

公开(公告)号：EP4142027A1

公开(公告)日：2023-03-01

申请号：EP20932320.3

申请日：2020-10-29

Applicant: BYD Company Limited

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

IPC: H01M50/112

Abstract: The present disclosure provides a battery pack and an electric vehicle. The battery pack includes a housing, at least one structural beam located in the housing, 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 at least one structural beam is located between the top plate and the bottom plate, the at least one structural beam is connected to the top plate and the bottom plate, the at least one structural beam divides the interior of the housing into multiple accommodating cavities, and at least one electrode core string is provided in at least one accommodating cavity. 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 multiple electrode core assemblies are encapsulated in an encapsulation film. A length direction of the electrode core string extends in the second direction.

公开(公告)号：EP4138180A1

公开(公告)日：2023-02-22

申请号：EP21807919.2

申请日：2021-04-20

Applicant: BYD Company Limited

Inventor： HU, Shichao ,  ZHU, Yan

IPC: H01M50/10 ,  H01M50/50 ,  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 an electrode core assembly (12) encapsulated in the encapsulation film. The electrode core assembly includes an electrode core assembly body (123) and two electrode lead-out members (122) of opposite polarities electrically connected to the electrode core assembly body. The electrode core assembly body includes at least two electrode cores (121) connected in parallel. Each of the electrode cores includes an electrode core body (1211) and two tabs (1213) of opposite polarities that are electrically connected to the electrode core body. The electrode core assembly body further includes a tab support (124). The two electrode lead-out members are respectively electrically connected to one of the tab supports located two sides of the electrode core assembly body in a first direction. Moreover, the present disclosure further provides a battery, a battery pack, and a vehicle.

公开(公告)号：EP4109651A1

公开(公告)日：2022-12-28

申请号：EP21757406.0

申请日：2021-02-04

Applicant: BYD Company Limited

Inventor： HU, Shichao ,  PENG, Qingbo ,  ZHU, Yan

IPC: H01M50/209 ,  H01M50/51

Abstract: A cell (100), a battery module (300), a battery pack (200), and an electric vehicle (1000) are provided. The cell (100) includes a metal housing (11) and at least one electrode core assembly array (14) encapsulated inside the metal housing (11). The electrode core assembly array (14) includes N rows and M columns of electrode core assemblies (12), and the electrode core assembly (12) includes an encapsulation film and at least one electrode core encapsulated inside the encapsulation film. In a length direction of the cell (100), the electrode core assemblies (12) are arranged in rows and each row includes M electrode core assemblies (12). In a thickness or height direction of the cell (100), the electrode core assemblies (12) are arranged in columns and each column includes N electrode core assemblies (12). The N electrode core assemblies (12) in each column are connected in series to form an electrode core assembly string (13). The M electrode core assembly strings (13) are connected in series. M and N are integers greater than 1. An air pressure between the metal housing (11) and the encapsulation film is lower than an air pressure outside the metal housing (11).

公开(公告)号：EP4102630A1

公开(公告)日：2022-12-14

申请号：EP21757581.0

申请日：2021-02-07

Applicant: BYD Company Limited

Inventor： YUAN, Wansong ,  YAN, Haipeng ,  JIANG, Xi ,  ZOU, Xiangda ,  ZHU, Yan

IPC: H01M50/207

Abstract: A cell array (20), including a plurality of cells (10) arranged in sequence is provided. Each of the plurality of cells (10) includes a housing (100) and an electrode core (201). The electrode core (201) includes an electrode plate. The electrode plate includes a current collector and a coating layer arranged on the current collector. The cell array (20) satisfies the following formula 1: (1 - JR w ) + (SR w - 1) = 10%-15%. JR w is an expansion space for the electrode core (201) inside each of the plurality of cells (10) in a first direction, SR w is an expansion space outside the plurality of cells (10) in the first direction, and a thickness direction of each of the plurality of cells (10) is defined as the first direction. JR w = P w /(Cell w - K w - Cw). SR w = (M w -MN w )/(Cell n × Cell w ).

公开(公告)号：EP4087024A1

公开(公告)日：2022-11-09

申请号：EP20913488.1

申请日：2020-12-29

Applicant: BYD Company Limited

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

IPC: H01M50/10 ,  H01M50/20

Abstract: A cell, a battery pack, and an electric vehicle are provided in the present disclosure. The cell includes a hermetical metal housing and at least two hermetical accommodating cavities, multiple electrode core assemblies, and an encapsulation film arranged in the metal housing. The electrode core assemblies are arranged along a first direction. The electrode core assemblies are connected in series. A length of each electrode core assembly extends along the first direction. The electrode core assembly includes an electrode core assembly body and a first electrode and a second electrode configured to lead out a current. The first electrode and the second electrode are respectively arranged on two sides of the electrode core assembly body along the first direction. At least one of the accommodating cavities is defined by the encapsulation film, and the electrode core assembly body is arranged in the accommodating cavity. A length of the cell extends along the first direction. The length of the cell ranges from 400 mm to 2500 mm. A thickness of the cell extends along a second direction perpendicular to the first direction. A ratio of the length to the thickness of the cell ranges from 5 to 250.