公开(公告)号：US20230040013A1

公开(公告)日：2023-02-09

申请号：US17792658

申请日：2021-01-04

Applicant: BYD COMPANY LIMITED

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

IPC: H01M50/24 ,  H01M50/249 ,  H01M50/271 ,  H01M50/30 ,  H01M50/51 ,  H01M50/224

Abstract: A battery pack and an electric vehicle are provided. The battery pack includes a battery sequence. The battery sequence includes multiple cells. A thickness of each cell extends along a first direction. The multiple cells are arranged in sequence along the first direction to form the battery sequence. At least one of the cells includes a metal shell and an electrode core packaged in the metal shell. An air pressure inside the metal shell is lower than an air pressure outside the metal shell. A gap is provided between at least two adjacent cells. A ratio of the gap to the thickness of the cell ranges from 0.001 to 0.15.

公开(公告)号：US20220416357A1

公开(公告)日：2022-12-29

申请号：US17778987

申请日：2020-11-19

Applicant: BYD COMPANY LIMITED

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

IPC: H01M50/298 ,  H01M50/51 ,  H01M50/519 ,  H01M50/184

Abstract: The present disclosure provides a battery, including: a housing (10); a plurality of accommodating cavities (60) arranged in the housing; a partition plate (20) for separating two adjacent accommodating cavities (60); an electrode core assembly (30), received in one of the accommodating cavities (60), the electrode core assembly (30) including at least one electrode core, and a plurality of electrode core assemblies (30) being sequentially arranged in a first direction and connected in series; a plurality of sampling wires, electrically connected to the plurality of electrode core assemblies (30) correspondingly; and a wire harness channel, receiving the plurality of sampling wires. A battery module, a battery pack, and an electric vehicle are further provided.

公开(公告)号：US20220416343A1

公开(公告)日：2022-12-29

申请号：US17777938

申请日：2020-10-22

Applicant: BYD COMPANY LIMITED

Inventor： Long HE ,  Huajun SUN ,  Yan ZHU ,  Liangwen TAN ,  Long WAN

IPC: H01M50/209 ,  H01M50/218 ,  H01M10/6555 ,  H01M10/613 ,  H01M10/625 ,  B60L50/64

Abstract: This application relates a battery pack and an electric vehicle. The battery pack includes a housing provided with a bottom surface and a top surface. A battery assembly is arranged in the housing. The battery assembly includes a structural reinforcing member and a cell sequence formed by connecting multiple cells. An outer surface of the cell includes a bottom surface, a top surface, first lateral surfaces, and two opposing second lateral surface. The bottom surface of the cell faces the bottom surface of the housing, and the top surface of the cell faces the top surface of the housing. The first lateral surface has a largest area. The multiple cells are arranged with second lateral surfaces thereof facing each other to form the cell sequence, and the structural reinforcing member is fixedly bonded with a first lateral surface of each cell in the cell sequence. The battery assembly abuts with the bottom surface of the housing to be supported in the housing.

公开(公告)号：US20210126231A1

公开(公告)日：2021-04-29

申请号：US17019852

申请日：2020-09-14

Applicant: BYD COMPANY LIMITED

Inventor： Chuanfu WANG ,  Long HE ,  Huajun SUN ,  Jianhua ZHU ,  Zhipei LU ,  Yan ZHU ,  Shichao HU

IPC: H01M2/10 ,  B60L50/64 ,  H01M2/36

Abstract: A battery includes a case and a battery core assembly disposed in the case, the battery core assembly includes a plurality of battery core groups and an receiving space holding the plurality of battery core groups, the battery core groups are connected in series, and the battery core group includes at least one battery core; a separator plate is disposed between at least two adjacent battery core groups, the separator plate divides the receiving space into a plurality of receiving cavities, each of the receiving cavities holds one or more battery core groups , and a cavity wall of the receiving cavity comprised by a connection of the separator plate and a separation membrane; and the battery further includes a liquid injection channel and the liquid injection channel in a sealed state, the liquid injection channel is disposed on at least one of the separation membranes and the separator plates.

公开(公告)号：US20250046942A1

公开(公告)日：2025-02-06

申请号：US18902375

申请日：2024-09-30

Applicant: BYD COMPANY LIMITED

Inventor： Huajun SUN ,  Xinyue Wang ,  Wansong Yuan ,  Yan Zhu ,  Pingan Duan

IPC: H01M50/342 ,  H01M50/249

Abstract: A vehicle has a battery pack. The battery pack includes a battery or a battery module. The battery includes a battery shell and an explosion-proof valve. The explosion-proof valve is arranged on the battery shell. The volume of the battery is V, and the unit of V is mm3. The explosion-proof valve is provided with a notch groove, and the explosion-proof valve has an opening region. In a depth direction of the notch groove, an outer edge of the orthographic projection of the opening region is a predetermined opening boundary, the area of the orthographic projection of the opening region is S, and the unit of S is mm2. S and V satisfy 0.3 mm−1≤(5000×S)/V≤6 mm−1.

公开(公告)号：US20250033530A1

公开(公告)日：2025-01-30

申请号：US18917096

申请日：2024-10-16

Applicant: BYD COMPANY LIMITED

Inventor： Ke ZHANG ,  Zizhu GUO ,  Yi PAN ,  Yan ZHU ,  Huajun SUN

IPC: B60L58/24 ,  B60L15/00 ,  B60L58/27 ,  H01M10/615 ,  H01M10/625 ,  H01M10/63 ,  H01M10/6571 ,  H01M50/51 ,  H05B6/10

Abstract: A power battery comprises a first battery cell group and a second battery cell group that are not equal in electromotive force and connected in series. The heating system comprises an inverter, an alternating-current motor, and a first controller. Midpoints of three bridge arms of the inverter are connected to head ends of three-phase coils of the motor in a one-to-one correspondence manner, and tail ends of the motor are connected together to form a neutral point. The neutral point is connected to a first connection point by means of a connection line, and the first connection point is a connection point between the first and second battery cell groups. The first controller is used for inputting a driving signal to the inverter. The first battery cell group, the second battery cell group, the inverter, the motor, and the connection line form an alternating-current self-heating loop.

公开(公告)号：US20240105962A1

公开(公告)日：2024-03-28

申请号：US18521727

申请日：2023-11-28

Applicant: BYD COMPANY LIMITED

Inventor： Yi PAN ,  Jing XIE ,  Zizhu GUO ,  Huajun SUN

IPC: H01M4/66 ,  H01M4/74 ,  H01M10/052 ,  H01M10/658

CPC classification number: H01M4/667 ,  H01M4/666 ,  H01M4/742 ,  H01M10/052 ,  H01M10/658 ,  H01M2004/027

Abstract: A current collector includes: a first polymer layer; a metal layer, the metal layer being disposed on a side of the first polymer layer; and a second polymer layer, the second polymer layer being disposed on a side of the metal layer far away from the first polymer layer; and in a direction from the first polymer layer to the second polymer layer, the current collector having a number of through-holes that penetrate the current collector.

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：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.