公开(公告)号：EP4525141A1

公开(公告)日：2025-03-19

申请号：EP23794831.0

申请日：2023-03-15

Applicant: BYD Company Limited

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

IPC: H01M10/615 ,  H01M10/625 ,  H01M10/657

Abstract: The present disclosure provides a heating system for heating a power battery, and an electric vehicle. 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 of the motor 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 battery cell group and the second battery cell group. 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：EP4517928A1

公开(公告)日：2025-03-05

申请号：EP23794786.6

申请日：2023-03-08

Applicant: BYD Company Limited

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

IPC: H01M10/60

Abstract: Provided are a heating system for heating a power battery, and an electric vehicle. A power battery comprises a first battery cell group (1) and a second battery cell group (2) which are connected in series. The heating system comprises an inverter (3), an alternating current motor (4), a first controller (6), and a connection line (S 1), midpoints of three bridge arms of the inverter (3) being connected in a one-to-one correspondence manner to head ends of three-phase coils of the alternating current motor (4), the first controller (6) being used for inputting a drive signal to the inverter (3), the first battery cell group (1), the second battery cell group (2), the inverter (3), the alternating current motor (4) and the connection line (S1) constituting an alternating current self-heating loop, at least one heating device (7) being connected in series in the connection line, and the heating device (7) being used for heating the first battery cell group and/or the second battery cell group.

公开(公告)号：EP4369496A2

公开(公告)日：2024-05-15

申请号：EP24167374.8

申请日：2019-06-21

Applicant: BYD Company Limited

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

IPC: H01M50/249

CPC classification number: B60K1/04 ,  B60K2001/043820130101 ,  H01M50/249 ,  H01M2220/2020130101 ,  H01M50/131 ,  H01M50/209 ,  H01M50/103 ,  H01M50/367 ,  H01M10/6554 ,  H01M10/6556 ,  H01M10/6567 ,  H01M10/6568 ,  H01M10/6569 ,  H01M10/625 ,  H01M50/119 ,  Y02E60/10

Abstract: A cell for a battery pack, a battery pack and an electric vehicle are provided. The cell for a battery pack comprising: a cell body (110) having a length L, a width H, a thickness D, a surface area S and a volume V, the length L of the cell body being greater than the width H, and the width H of the cell body being greater than the thickness D, and satisfy: L/H=4−21,S/V=0.1mm−1−0.35mm−1,D/V=0.0000065mm−2−0.00002mm−2.

公开(公告)号：EP4369491A2

公开(公告)日：2024-05-15

申请号：EP24167368.0

申请日：2019-06-21

Applicant: BYD Company Limited

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

IPC: H01M50/249

CPC classification number: B60K1/04 ,  B60K2001/043820130101 ,  H01M50/249 ,  H01M2220/2020130101 ,  H01M50/131 ,  H01M50/209 ,  H01M50/103 ,  H01M50/367 ,  H01M10/6554 ,  H01M10/6556 ,  H01M10/6567 ,  H01M10/6568 ,  H01M10/6569 ,  H01M10/625 ,  H01M50/119 ,  Y02E60/10

Abstract: A battery pack and an electric vehicle are provided. The battery pack includes a housing (200) comprising a vehicle tray (210) that is fitted and connected to a vehicle body; or a housing being formed on a vehicle body; and a plurality of cells, provided in the housing, wherein the sum V1 of the volumes of the plurality of cells and the volume V2 of the battery pack satisfy V1/V2≥55%. The battery pack has a first direction and a second direction perpendicular to each other. A length direction of the cell is arranged along the first direction of the battery pack, and the plurality of cells are arranged along the second direction of the battery pack. The housing accommodates only one cell along the first direction; and the cell comprises a cell body, and the length of the cell body is 400-2500 mm.

公开(公告)号：EP4328070A3

公开(公告)日：2024-05-01

申请号：EP23214634.0

申请日：2020-10-29

Applicant: BYD Company Limited

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

IPC: H01M50/112 ,  H01M10/613 ,  H01M10/625 ,  H01M10/647 ,  H01M10/6557 ,  H01M50/10 ,  H01M50/204 ,  H01M50/207 ,  H01M50/209 ,  H01M50/211 ,  H01M50/224 ,  H01M50/242 ,  H01M50/249 ,  H01M50/291 ,  H01M50/358 ,  H01M50/367 ,  B60L50/64

CPC classification number: Y02E60/10 ,  Y02T10/70 ,  B60L50/64 ,  H01M10/613 ,  H01M10/625 ,  H01M10/647 ,  H01M50/10 ,  H01M50/204 ,  H01M50/211 ,  H01M50/224 ,  H01M50/242 ,  H01M50/249 ,  H01M50/291 ,  H01M50/358 ,  H01M10/6557 ,  H01M50/207 ,  H01M50/209 ,  H01M50/367

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：EP4350864A2

公开(公告)日：2024-04-10

申请号：EP24159357.3

申请日：2019-06-21

Applicant: BYD Company Limited

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

IPC: H01M50/249

Abstract: The invention basically relates to a battery pack, comprising a cell array and a support member, wherein the cell array comprises a plurality of cells, at least one of the cells comprises a cell body and electrode terminals extending out of the cell body and configured to output a current inside the cell body, the at least one cell comprises 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 cell body being substantially a cuboid with a length L, 600 mm≤L≤2500 mm, a thickness D, a height H and a volume V; the length L of the cell body being greater than or equal to the height H of the cell body and the height H of the cell body being greater than or equal to the thickness D of the cell body, wherein the cell meets 0.0005mm-2≤L/V≤0.002mm-2 and 4≤L/H≤21 and 23≤L/D≤208.

公开(公告)号：EP4318781A3

公开(公告)日：2024-04-10

申请号：EP23214629.0

申请日：2020-10-29

Applicant: BYD Company Limited

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

IPC: H01M50/10 ,  H01M50/105 ,  H01M10/625 ,  H01M10/6557 ,  H01M50/207 ,  H01M50/209 ,  H01M50/211 ,  H01M50/224 ,  H01M50/244 ,  H01M50/249 ,  H01M50/30 ,  H01M50/367 ,  B60L50/64 ,  H01M10/613 ,  H01M10/6555 ,  H01M50/242 ,  H01M50/276 ,  H01M50/588 ,  H01M50/593 ,  H01M50/502 ,  B60L58/26

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：EP4311008A3

公开(公告)日：2024-04-10

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: H01M50/10 ,  H01M50/105 ,  H01M10/625 ,  H01M10/6557 ,  H01M50/207 ,  H01M50/209 ,  H01M50/211 ,  H01M50/224 ,  H01M50/244 ,  H01M50/249 ,  H01M50/30 ,  H01M50/367 ,  B60L50/64 ,  H01M10/613 ,  H01M10/6555 ,  H01M50/242 ,  H01M50/276 ,  H01M50/588 ,  H01M50/593 ,  H01M50/502 ,  B60L58/26

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：EP4328070A2

公开(公告)日：2024-02-28

申请号：EP23214634.0

申请日：2020-10-29

Applicant: BYD Company Limited

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

IPC: B60L50/64

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：EP4113729A1

公开(公告)日：2023-01-04

申请号：EP21759605.5

申请日：2021-01-28

Applicant: BYD Company Limited

Inventor： SUN, Huajun ,  WANG, Gaowu ,  LIU, Guoxiong ,  ZHU, Yan

IPC: H01M50/50 ,  H01M50/583 ,  H01M50/20 ,  B60L3/00 ,  B60L50/64

Abstract: Disclosed are a battery pack (200) and an electric vehicle. The battery pack (200) includes at least one battery unit (21). The battery unit (21) includes at least one battery string (1006). The battery string (1006) includes one or at least two cells (100). A voltage difference across the battery string (1006) is less than or equal to 60 V. When the battery string (1006) includes at least two cells (100), the cells (100) in the battery string (1006) are arranged sequentially along a first direction, and the first direction is parallel to a direction from the tail of the vehicle to the head of the vehicle.