公开(公告)号：US20230347450A1

公开(公告)日：2023-11-02

申请号：US18006523

申请日：2021-07-19

Applicant: BYD COMPANY LIMITED

Inventor： Xinjun JIANG ,  Xiaobo TANG ,  Xiaoyong ZHANG ,  Jian ZHANG ,  Jianjun WANG

IPC: B23K26/38 ,  H01M4/139 ,  H01M4/04

CPC classification number: B23K26/38 ,  H01M4/139 ,  H01M4/0471

Abstract: The present disclosure discloses a method and device for forming a groove on an electrode plate. The method for forming a groove on an electrode plate includes: thinning an active material layer by a laser method, where the active material layer is located in a to-be-grooved area of the electrode plate; and removing the thinned active material layer by a physical removal method to form an accommodating groove that exposes the current collector layer. By adopting a combination of the laser method and the physical removal method, the present disclosure, the present disclosure, on the one hand, can quickly remove the active material layer in the to-be-grooved area, and on the other hand, can avoid damaging the current collector layer. This ensures the processing precision, speeds up the production and improves the product yield.

公开(公告)号：US20230048047A1

公开(公告)日：2023-02-16

申请号：US17977821

申请日：2022-10-31

Applicant: BYD COMPANY LIMITED

Inventor： Xinjun JIANG ,  Jian ZHANG ,  Lei LEI

IPC: H01M10/0587 ,  H01M4/13

Abstract: An electrode sheet includes a current collector and a first active material layer on a first surface of the current collector. The first active material layer includes a main portion and a first buffer portion. The main portion includes a first inner surface and an outer surface. The first inner surface is attached to the current collector, and the outer surface is parallel to the first inner surface. The first active material layer has a height that is a vertical distance from the outer surface to the first inner surface. The first buffer portion includes a second inner surface, a buffer surface, and an inner wall surface defining a first groove. A first end of the buffer surface is connected to the outer surface, a second end of the buffer surface is connected to the inner wall surface. The inner wall surface is shorter than the first active material layer.

公开(公告)号：US20240128551A1

公开(公告)日：2024-04-18

申请号：US18392593

申请日：2023-12-21

Applicant: BYD COMPANY LIMITED

Inventor： Liwei LIANG ,  Shumin HU ,  Yuanyuan CHEN ,  Jian ZHANG ,  Jinzhong OUYANG

IPC: H01M50/103 ,  H01M50/15

CPC classification number: H01M50/103 ,  H01M50/15

Abstract: a first, a second, a third, and a fourth side plates of a battery casing are connected in sequence. The first and the third side plates are arranged opposite to each other, and the first side plate is shorter than the third side plate. The second and the fourth side plates are arranged opposite to each other, and the fourth side plate is shorter than the second side plate. A connecting plate adapted to mount a tab of a battery is provided between the first and the fourth side plates and connected to the first and the fourth side plates, and the connecting plate is shorter than the second and the third side plates. The first, the second, the third, and the fourth side plates and the connecting plate are located at the same side of a support plate, and work with the support plate to define an accommodating cavity.

公开(公告)号：US20230052214A1

公开(公告)日：2023-02-16

申请号：US17977043

申请日：2022-10-31

Applicant: BYD COMPANY LIMITED

Inventor： Xinjun JIANG ,  Jian ZHANG ,  Lei LEI

IPC: H01M4/70 ,  H01M50/46

Abstract: An electrode sheet includes a current collector and a first active material layer coated on a first surface of the current collector. The first active material layer includes a first groove, and the first groove includes a first side wall, a second side wall, and a third side wall. The first side wall and the second side wall are arranged parallel to each other, and the third side wall connects the first side wall and the second side wall. The first groove has a width that is a distance from the first side wall to the second side wall, and a length of a surface contour of a cross-section view of the third side wall is greater than the width of the first groove.

公开(公告)号：US20240021936A1

公开(公告)日：2024-01-18

申请号：US18373963

申请日：2023-09-28

Applicant: BYD COMPANY LIMITED

Inventor： Guosheng TANG ,  Liwei LIANG ,  Shumin HU ,  Jian ZHANG ,  Jinzhong OUYANG

IPC: H01M50/202 ,  H01M50/271 ,  H01M50/224

CPC classification number: H01M50/202 ,  H01M50/271 ,  H01M50/224

Abstract: A battery housing includes an upper housing and a lower housing. The lower housing includes a bottom portion and first side walls, the first side walls extend upward from edges of the bottom portion, the bottom portion and the first side walls enclose a cavity, and at least one of the first side walls having a first flange on an end of the first side wall away from the bottom portion. The upper housing is located above the lower housing, the upper housing includes a top portion and a second flange, a second concave structure is disposed at a joint between the second flange and the top portion, the first flange is in contact with the second flange by welding to obtain melt, and the melt is disposed in the second concave structure.

公开(公告)号：US20240014471A1

公开(公告)日：2024-01-11

申请号：US18472532

申请日：2023-09-22

Applicant: BYD COMPANY LIMITED

Inventor： Guosheng TANG ,  Liwei LIANG ,  Shumin HU ,  Jian ZHANG ,  Jinzhong OUYANG

IPC: H01M50/103 ,  H01M50/15

CPC classification number: H01M50/103 ,  H01M50/15 ,  H01M50/169

Abstract: A battery housing includes a first housing and a second housing. An accommodating space with an opening is defined by a bottom plate, two first side plates and two second side plates of the first housing. The second housing includes a body, and two first extending plates and two second extending plates arranged on a peripheral edge of the body. An avoiding region is formed on one second side plate. In a first direction, a width of the second extending plate corresponding to the second side plate provided with the avoiding region is smaller than or equal to a width of the avoiding region, and additionally, a width of the two first extending plates is greater than a width of the second extending plate. The second housing covers the opening of the first housing, and the two first extending plates and the two first side plates are fixedly connected.