公开(公告)号：US20220416346A1

公开(公告)日：2022-12-29

申请号：US17777819

申请日：2020-10-19

Applicant: BYD COMPANY LIMITED

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

IPC: H01M50/242 ,  H01M50/209 ,  H01M50/264

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 lateral surfaces. The bottom surface of the cell faces a bottom surface of the casing. The lateral surfaces include a first lateral surface and two opposite second lateral surfaces. The first lateral surface has a largest area among the lateral surfaces. An area of the first lateral surface is greater than an area of the bottom surface and the area of the first lateral surface is greater than an area of the top surface. The N cells are arranged in sequence. The second lateral surfaces of two adjacent cells are arranged opposite to each other. The reinforcing member is fixedly bonded to the first lateral surface of each cell in Q adjacent cells. N>Q≥2.

公开(公告)号：US20220126705A1

公开(公告)日：2022-04-28

申请号：US17422124

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: B60L50/60 ,  B60K1/04 ,  H01M50/209 ,  H01M50/249 ,  H01M50/244 ,  H01M50/543 ,  H01M50/271 ,  H01M50/317 ,  H01M10/42 ,  H01M10/613 ,  H01M10/625 ,  H01M10/647 ,  H01M10/6551

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, each of the plurality of cells has a first size, and the first size is a maximum value of spacings between pairs of imaginary parallel planes that clamp the cell; at least one cell satisfies 600 mm≤first size≤2500 mm, and is supported by the support member; and a normal direction of two parallel planes corresponding to the first size is a direction Q, a battery placement area is defined in the battery pack, the cell array is located in the battery placement area, and each of the plurality of cells extends from one side of the battery placement area to another side of the battery placement area along the direction Q.

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：US20250038350A1

公开(公告)日：2025-01-30

申请号：US18912109

申请日：2024-10-10

Applicant: BYD COMPANY LIMITED

Inventor： Huajun SUN ,  Wansong YUAN ,  Xinyue WANG ,  Yan ZHU ,  Dongjun DENG

IPC: H01M50/342 ,  B60R16/04 ,  H01M50/103

Abstract: A battery includes a battery shell and an anti-explosion valve disposed on the battery shell. A notch groove is disposed on the anti-explosion valve. The anti-explosion valve comprises an opening region. In a depth direction of the notch groove, an outer edge of an orthographic projection of the opening region is an opening boundary, an area S1 of the orthographic projection of the opening region in mm2 and a capacity A of the battery in Ah meet: S1>0.5 A.

公开(公告)号：US20250038306A1

公开(公告)日：2025-01-30

申请号：US18917868

申请日：2024-10-16

Applicant: BYD COMPANY LIMITED

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

IPC: H01M10/6572 ,  H01M10/615 ,  H01M10/617 ,  H01M10/625 ,  H01M10/63

Abstract: A heating system for heating a battery, includes an inverter including three bridge arms, an alternating current motor, a first controller, and a connection line. A positive electrode of the battery connects to upper bridge arms of the inverter. A negative electrode of the battery connects to lower bridge arms of the inverter. Midpoints of the three bridge arms connects to head ends of three coils of the alternating current motor respectively. Tail ends of the three coils connects together as a neutral point. A first end of the connection line connects to the neutral point, and a second end of the connection line connects to the battery. The first controller inputs a drive signal to the inverter. The battery, the inverter, the alternating current motor, and the connection line form an alternating current self-heating loop. A heating device connects to the connection line, and heats the battery.

公开(公告)号：US20250038305A1

公开(公告)日：2025-01-30

申请号：US18916997

申请日：2024-10-16

Applicant: BYD COMPANY LIMITED

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

IPC: H01M10/6572 ,  H01M10/615 ,  H01M10/625

Abstract: A power battery comprises a first cell group and a second cell group connected in series. The heating system comprises an inverter, an AC motor, a first controller, and a plurality of connection lines. The midpoints of three bridge arms of the inverter are connected to the head ends of three-phase coils of the AC motor in a one-to-one correspondence. The tail ends of the AC motor are connected together to form a neutral point. First ends of the connection lines are connected to the neutral point of the AC motor. Second ends of the connection lines are connected to a connection point between the first cell group and the second cell group. The first controller is configured to input a drive signal to the inverter. The first cell group, the second cell group, the inverter, the AC motor, and the connection lines form an AC self-heating loop.

公开(公告)号：US20230198068A1

公开(公告)日：2023-06-22

申请号：US17972120

申请日：2022-10-24

Applicant: BYD COMPANY LIMITED

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

IPC: H01M50/24 ,  H01M50/30 ,  H01M50/505 ,  H01M50/211 ,  H01M50/509 ,  H01M50/569 ,  H01M50/291 ,  H01M50/249 ,  B60K1/04

CPC classification number: H01M50/24 ,  H01M50/394 ,  H01M50/505 ,  H01M50/211 ,  H01M50/509 ,  H01M50/569 ,  H01M50/291 ,  H01M50/249 ,  B60K1/04 ,  H01M2220/20

Abstract: A 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, and 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.

公开(公告)号：US20230093575A1

公开(公告)日：2023-03-23

申请号：US18070850

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 ,  H01M50/531 ,  H01M4/70 ,  H01M4/66 ,  H01M50/103

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 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

公开(公告)号：US20230079318A1

公开(公告)日：2023-03-16

申请号：US17991693

申请日：2022-11-21

Applicant: BYD COMPANY LIMITED

Inventor： Huajun SUN ,  Yan ZHU

IPC: H01M50/289 ,  H01M50/249 ,  H01M50/271 ,  H01M50/51 ,  H01M50/512 ,  H01M50/211 ,  H01M50/121 ,  H01M50/124 ,  B60L50/64

Abstract: This application provides a battery pack, a vehicle, and an energy storage device. The battery pack includes at least one battery sequence. The battery sequence includes a plurality of batteries. A thickness of each battery extends along a first direction. The plurality of batteries are successively arranged along the first direction to form the battery sequence. At least one of the batteries includes a casing and a core packaged in the casing. A gap exists between at least two neighboring batteries. A ratio of the gap to the thickness of the battery is c, and c satisfies the following relational expression: c/a=0.01-0.5, where a represents an expansion rate of the battery.