公开(公告)号：US20230086598A1

公开(公告)日：2023-03-23

申请号：US18070876

申请日：2022-11-29

Applicant: BYD COMPANY LIMITED

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

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M4/66 ,  H01M4/58 ,  H01M4/583

Abstract: The present disclosure provides a lithium ion battery, 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 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：US20230080969A1

公开(公告)日：2023-03-16

申请号：US17989585

申请日：2022-11-17

Applicant: BYD COMPANY LIMITED

Inventor： Huajun SUN ,  Xiaopeng WANG ,  Qingbo PENG ,  Zhipeng LU ,  Yan ZHU

IPC: H01M50/207 ,  H01M50/112 ,  H01M50/291 ,  H01M50/244 ,  H01M50/531 ,  H01M50/588 ,  H01M50/591 ,  H01M50/174 ,  H01M50/548 ,  H01M50/51 ,  H01M50/512 ,  H01M50/474 ,  H01M50/477 ,  H01M50/342 ,  H01M10/613 ,  H01M10/625 ,  H01M10/6567 ,  H01M50/249 ,  B60L50/64

Abstract: A battery pack includes a housing and multiple electrode core strings electrically connected to each other and disposed in the housing. The housing includes a housing body which includes sub-housings connected to each other. A sub-housing includes at least one reinforcing plate and a top plate and a bottom plate oppositely arranged in a first direction. The reinforcing plate is arranged between and is connected to the top plate and the bottom plate, and divides an interior of the corresponding sub-housing into multiple accommodating cavities. At least one accommodating cavity includes at least one electrode core string which includes electrode core assemblies connected and arranged in a second direction. The electrode core assemblies are disposed in an encapsulation film. A length of the electrode core string extends in the second direction. The housing includes a mounting component that is configured to be connected and fixed to an external load.

公开(公告)号：US20230070599A1

公开(公告)日：2023-03-09

申请号：US17800664

申请日：2021-02-07

Applicant: BYD COMPANY LIMITED

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

IPC: H01M10/04 ,  H01M10/658 ,  H01M10/44

Abstract: A cell array, including a plurality of cells arranged in sequence is provided. Each of the plurality of cells includes a housing and an electrode core. The electrode core includes an electrode plate. The electrode plate includes a current collector and a coating layer arranged on the current collector. The cell array satisfies the following formula 1: (1−JRw)+(SRw−1)=10%−15%. JRw is an expansion space for the electrode core inside each of the plurality of cells in a first direction, SRw is an expansion space outside the plurality of cells in the first direction, and a thickness direction of each of the plurality of cells is defined as the first direction. JRw=Pw/(Cellw−Kw−Cw). SRw=(Mw−MNw)/(Celln×Cellw).

公开(公告)号：US20230069873A1

公开(公告)日：2023-03-09

申请号：US17988006

申请日：2022-11-16

Applicant: BYD COMPANY LIMITED

Inventor： Shichao HU ,  Yan ZHU ,  Xin GAO

IPC: H01M50/176 ,  H01M50/103 ,  H01M50/249 ,  H01M50/209

Abstract: The present disclosure provides a battery core assembly, a battery, a battery pack, and a vehicle. The battery core assembly includes an encapsulation film and an electrode core assembly. The electrode core assembly is arranged in an accommodating cavity defined by the encapsulation film, and the electrode core assembly includes at least one electrode core. The electrode core assembly includes a first electrode lead-out member and a second electrode lead-out member for current output, and a cap is arranged in the accommodating cavity at a first end portion of the electrode core assembly. The first end portion of the electrode core assembly has the first electrode lead-out member, and the cap includes an electrode lead-out hole, where the first electrode lead-out member passes through the electrode lead-out hole.

公开(公告)号：US20230059574A1

公开(公告)日：2023-02-23

申请号：US17792318

申请日：2021-01-04

Applicant: BYD COMPANY LIMITED

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

IPC: H01M50/119 ,  H01M10/04 ,  H01M50/186 ,  H01M50/103 ,  H01M50/451 ,  H01M50/317 ,  H01M50/51 ,  H01M50/529

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

公开(公告)号：US20230055300A1

公开(公告)日：2023-02-23

申请号：US17797370

申请日：2021-02-04

Applicant: BYD COMPANY LIMITED

Inventor： Huajun SUN ,  Qingbo PENG ,  Shichao HU ,  Yan ZHU ,  Xin GAO

IPC: B60L50/64 ,  B60L50/60 ,  H01M50/119 ,  H01M50/548 ,  H01M50/209 ,  H01M50/249

Abstract: A battery pack and a vehicle are provided. The battery pack is fixed to the vehicle and is configured to provide electric energy for the vehicle. The battery pack includes a cell array. The cell array includes at least one cell. The cell includes electrode terminals for leading out current. A first direction is defined as a front-to-rear direction of the vehicle. The electrode terminals are oriented parallel to the first direction.

公开(公告)号：US20230042566A1

公开(公告)日：2023-02-09

申请号：US17972099

申请日：2022-10-24

Applicant: BYD COMPANY LIMITED

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

IPC: H01M50/244 ,  H01M50/249 ,  B60L50/60 ,  B60L50/64

Abstract: The present disclosure provides a battery pack housing, a battery pack, and an electric vehicle. The battery pack housing includes a housing body and at least one structural beam disposed in the housing body. The at least one structural beam divides the internal space of the housing body into a number of accommodation cavities. The housing body includes a top plate and a bottom plate arranged opposite to each other in a first direction, the first direction is a height direction of the battery pack housing, and the structural beam is located between and attached to the top plate and the bottom plate. The battery pack housing comprises a mounting part for connecting mounting portion for a fixed connection with an external load. The battery pack housing disclosed in the present disclosure has relatively high strength and stiffness as well as high space utilization.

公开(公告)号：US20230041540A1

公开(公告)日：2023-02-09

申请号：US17971901

申请日：2022-10-24

Applicant: BYD COMPANY LIMITED

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

IPC: H01M50/291 ,  H01M50/211 ,  H01M50/271 ,  H01M50/509 ,  H01M50/242 ,  H01M50/224 ,  H01M50/178 ,  H01M50/548 ,  H01M50/503 ,  B60L50/64

Abstract: A battery pack includes a 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 is connected to the top plate and the bottom plate, and 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.

公开(公告)号：US20230041144A1

公开(公告)日：2023-02-09

申请号：US17792657

申请日：2021-01-12

Applicant: BYD COMPANY LIMITED

Inventor： Huajun SUN ,  Zhipei LU ,  Yan ZHU ,  Shichao HU

IPC: H01M50/211 ,  H01M50/119 ,  H01M50/103 ,  H01M50/105 ,  H01M50/121 ,  H01M50/124 ,  H01M50/133 ,  H01M50/209 ,  H01M50/249

Abstract: A cell (100) is provided, which includes a metal housing (11) and multiple electrode core strings encapsulated in the metal housing (11). The multiple electrode core strings are arranged in a second direction and sequentially connected in series. Each of the electrode core strings includes an encapsulation film (13) and multiple electrode core assemblies (12) arranged in a first direction and sequentially connected in series. The electrode core assemblies (12) are encapsulated in the encapsulation film (13). An air pressure between the metal housing (11) and the encapsulation film (13) is lower than an air pressure outside the metal housing (11).

公开(公告)号：US20220416336A1

公开(公告)日：2022-12-29

申请号：US17781306

申请日：2020-10-23

Applicant: BYD COMPANY LIMITED

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

IPC: H01M50/164 ,  H01M50/159 ,  H01M50/543 ,  H01M50/148 ,  H01M50/593

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).