公开(公告)号：US20220118840A1

公开(公告)日：2022-04-21

申请号：US17421875

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: B60K1/04 ,  B60L50/64 ,  B60L50/60 ,  H01M50/317 ,  H01M50/249 ,  H01M50/209 ,  H01M50/119

Abstract: A power battery pack includes: a pack body; a plurality of cells, disposed in the pack body; the cell having a length L0, a width H0, and a thickness D0, where at least one cell meets: L0>H0≥D0, a length direction of the cell is arranged along a width direction of a vehicle body of the electric vehicle, and in the width direction of the electric vehicle, the length L0 of the cell and a size W of the vehicle body of the electric vehicle in the width direction meet: 46%≤L0/W≤76%; or at least one cell meets: L0>H0≥D0, a length direction of the cell is arranged along a length direction of a vehicle body of the electric vehicle, and in the length direction of the electric vehicle, the length L0 of the cell and a size X of the vehicle body of the electric vehicle in the length direction meet: 40%≤L0/W≤76%.

公开(公告)号：US20210126293A1

公开(公告)日：2021-04-29

申请号：US17017461

申请日：2020-09-10

Applicant: BYD COMPANY LIMITED

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

IPC: H01M10/42 ,  H01M2/10 ,  H01M2/36 ,  H01M10/0525 ,  H01M10/0585

Abstract: The present invention provides a lithium-ion battery, including: a housing and a separator located inside the housing, where the separator separates internal space of the housing into a plurality of accommodation cavities, battery core sets are disposed inside the accommodation cavities, the battery core sets each include at least one pole shank, and the battery core sets are connected in series; and at least one separator is provided with a liquid injection hole, and the liquid injection hole is used to connect two adjacent accommodation cavities on two sides of the separator; and a block mechanism, where the block mechanism is located inside the housing, the block mechanism enables the liquid injection hole to be in a predetermined state, and the predetermined state includes an open state and a closed state. The battery provided in the present invention ensures isolation and safety of each battery core set while facilitating liquid injection.

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：US20230110488A1

公开(公告)日：2023-04-13

申请号：US17792246

申请日：2021-01-08

Applicant: BYD COMPANY LIMITED

Inventor： Yan ZHU ,  Shichao HU

IPC: H01M50/119 ,  B60L50/64 ,  H01M50/133 ,  H01M50/15 ,  H01M50/159 ,  H01M50/184 ,  H01M50/209 ,  H01M10/04

Abstract: A battery (100), a battery module, a battery pack (200), and an electric vehicle are provided. The battery (100) includes a metal housing (11), a packaging member, and multiple electrode core assemblies (12). The packaging member includes two packaging portions (13) that are arranged opposite to each other. The packaging member has an internal space. The two packaging portions (13) are joined at a predetermined position to divide the internal space of the packaging member into multiple sealed accommodating cavities. At least one sealed accommodating cavity is provided with the electrode core assembly (12). The metal housing (11) is sleeved outside the packaging member.

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.

公开(公告)号：US20230076552A1

公开(公告)日：2023-03-09

申请号：US17988053

申请日：2022-11-16

Applicant: BYD COMPANY LIMITED

Inventor： Shichao HU ,  Yan ZHU

IPC: H01M50/538 ,  H01M50/289 ,  H01M50/682

Abstract: A battery core assembly includes an encapsulation film and multiple electrode core assemblies disposed in the encapsulation film. The electrode core assemblies are connected to form an electrode core string, and each of the electrode core assemblies includes at least one electrode core. A spacer is disposed between two adjacent electrode core assemblies, the first spacer divides an accommodating space inside the encapsulation film into multiple accommodating cavities, cavity walls of the accommodating cavities includes the first spacer and the encapsulation film connected to the first spacer, and the electrode core assemblies are respectively accommodated in the accommodating cavities. The first spacer includes at least one first liquid reservoir, and the at least one first liquid reservoir communicates with one of accommodating cavities on both sides of the first spacer.