公开(公告)号：US20210249725A1

公开(公告)日：2021-08-12

申请号：US17049732

申请日：2019-06-21

Applicant: BYD COMPANY LIMITED

Inventor： Long HE ,  Huajun SUN ,  Wenfeng JIANG ,  Zhipei LU ,  Weixin ZHENG ,  Jianglong TANG ,  Yan ZHU ,  Xinyue WANG ,  Kefeng HE

IPC: H01M50/209 ,  B60K1/04 ,  B60L50/64 ,  B60L50/60 ,  H01M50/244 ,  H01M50/249 ,  H01M10/613 ,  H01M10/625 ,  H01M10/6554

Abstract: A battery pack, a vehicle, and an energy storage device are provided. The battery pack includes a cell array and a support member, where the cell array includes a plurality of cells, the cell has a first dimension, and the first dimension is a maximum spacing between two imaginary parallel planes sandwiching the cell; and at least one of the cells 600 mm≤first dimension≤2500 mm the at least one cell includes a casing and a core located inside the casing, a supporting region is formed on the casing, and the cell is connected to the support member through the supporting region and is supported by the support member. The support member is connected to the supporting region to support the cell.

公开(公告)号：US20210175572A1

公开(公告)日：2021-06-10

申请号：US17048947

申请日：2019-06-21

Applicant: BYD COMPANY LIMITED

Inventor： Long HE ,  Huajun SUN ,  Wenfeng JIANG ,  Zhipei LU ,  Weixin ZHENG ,  Jianglong TANG ,  Yan ZHU ,  Xinyue WANG ,  Kefeng HE

IPC: H01M50/209 ,  H01M50/249 ,  H01M50/383 ,  B60K1/04

Abstract: A battery pack, a vehicle, and an energy storage device are provided. The battery pack includes: a battery pack housing and a plurality of rectangular cells, the battery pack housing having a first direction and a second direction perpendicular to the first direction; where the battery pack has a dimension greater than or equal to 600 mm along the first direction, and at least one rectangular cell accommodating unit is formed in the battery pack housing; the plurality of rectangular cells are arranged in the rectangular cell accommodating unit along the second direction; the rectangular cell extends along the first direction, and one rectangular cell is disposed in each rectangular cell accommodating unit along the first direction; the rectangular cell has a thickness of D, a length of L, and a height of H; the battery pack has a dimension greater than or equal to L along the first direction; and a length direction of at least one rectangular cell extends from one side of the rectangular cell accommodating unit to the other side of the rectangular cell accommodating unit along the first direction, and meets: L>H, L>D, 600 mm≤L≤2500 mm, 23≤L/D≤208.

公开(公告)号：US20200058908A1

公开(公告)日：2020-02-20

申请号：US16499790

申请日：2018-03-16

Applicant: BYD COMPANY LIMITED

Inventor： Weixin ZHENG ,  Xi SHEN ,  Jianhua ZHU ,  Luxia JIANG ,  Yan ZHU

IPC: H01M2/02 ,  B60K1/04 ,  B60L50/64

Abstract: A battery cover assembly includes a cover plate, an electrode inner terminal and an electrode outer terminal. The electrode inner terminal is electrically connected to the electrode outer terminal through a current interrupt structure disposed on the cover plate. The current interrupt structure includes a sealed chamber configured to fill a gas-producing medium therein. The sealed chamber is configured to make the gas-producing medium to be electrically connected to positive electrodes and negative electrodes of a battery. When a voltage difference between the positive electrodes and negative electrodes of the battery exceeds a rated value, the gas-producing medium is capable of producing gas, to disrupt the electrical connection between the electrode inner terminal and the electrode outer terminal under the action of the pressure of the gas.

公开(公告)号：US20190273227A1

公开(公告)日：2019-09-05

申请号：US16348419

申请日：2017-11-07

Applicant: BYD COMPANY LIMITED

Inventor： Yi ZENG ,  Weixin ZHENG ,  Jianhua ZHU ,  Yan ZHU

IPC: H01M2/10 ,  H01M10/613

Abstract: A power battery base includes a tray and a liquid cooling tube disposed on the tray, wherein the tray includes a bottom plate and side plates disposed around the periphery of the bottom plate, the bottom plate and the side plates jointly form a receiving cavity for receiving a power battery pack, the bottom plate is provided with at least one beam, the beam divides the bottom plate into at least two sub-bottom plates, the liquid cooling tube is laid on at least one of the sub-bottom plates, and the liquid cooling tube is disposed across the beam that it passes through.

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：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.