公开(公告)号：EP4481919A1

公开(公告)日：2024-12-25

申请号：EP23815140.1

申请日：2023-05-29

Applicant: BYD Company Limited

Inventor： TAN, Zhijia ,  WAN, Long ,  PENG, Qingbo ,  WANG, Ran ,  SUN, Zenan

IPC: H01M50/231 ,  H01M50/224 ,  H01M50/227 ,  H01M50/249 ,  H01M50/244 ,  H01M50/24 ,  H01M50/242 ,  H01M50/236

Abstract: In order to overcome the problem of the corrosion resistance of existing battery pack bottom protection plates being insufficient due to a surface PVC layer peeling under impact, the present application provides a battery protection bottom plate, comprising a protection layer, a metal plate and a fiber-reinforced resin layer. The metal plate is located between the protection layer and the fiber-reinforced resin layer, and the metal plate and the fiber-reinforced resin layer satisfy the condition in formula I. 0.4 ≤ d 1 d 2 * e − ε 0 ∗ σ 2 σ 0 ∗ ε 2 + 0.5 ≤ 2.0
In addition, further disclosed in the present application are a battery pack composite protection structure comprising the battery protection bottom plate, and a vehicle.

公开(公告)号：EP4546532A1

公开(公告)日：2025-04-30

申请号：EP23826567.2

申请日：2023-06-21

Applicant: BYD Company Limited

Inventor： LIAO, Zhengyuan ,  WANG, Xiaolong ,  LU, Zhipei ,  LIU, Xufeng ,  SUN, Zenan

IPC: H01M50/258 ,  H01M50/30 ,  H01M50/358 ,  H01M50/204 ,  H01M50/244 ,  H01M50/249 ,  B60L50/64

Abstract: A battery pack and a vehicle. The battery pack comprises a sealing cover, a tray, a plurality of battery cells, insulating layers, and at least one connecting sheet, wherein the tray is connected to the sealing cover to define an accommodating cavity; the plurality of battery cells are arranged in the accommodating cavity; the side of each battery cell facing away from the sealing cover is provided with a first explosion-proof valve; each insulating layer is arranged on the side of the battery cell facing away from the sealing cover; the connecting sheet is arranged on the insulating layer; the battery cells are electrically connected by means of the connecting sheet; and each insulating layer is provided with a gas emission portion configured to make the outside be in communication with the first explosion-proof valve.

公开(公告)号：EP4525170A1

公开(公告)日：2025-03-19

申请号：EP23802997.9

申请日：2023-05-11

Applicant: BYD Company Limited

Inventor： ZHU, Yan ,  SUN, Zenan ,  LIU, Xufeng ,  WANG, Xinyue

IPC: H01M50/342

Abstract: A vehicle provided with a battery pack, the battery pack comprising a battery or a battery module, the battery comprising an explosion-proof valve, the explosion-proof valve comprising an explosion-proof valve body, an edge of the explosion-proof valve body being provided with a connection segment, the explosion-proof valve body being provided with a notched groove, the explosion-proof valve body being provided with an opening area, and the opening area being located on the radial inner side of the connection segment. In the depth direction of the notched groove, the shape of the orthographic projection of the explosion-proof valve body and the shape of the orthographic projection of the opening area are both non-circular, the outer edge of the orthographic projection of the opening area is a predetermined opening boundary, the area of the orthographic projection of the opening area is S opening , the area of the orthographic projection of the connection segment is S connection , the area of the orthographic projection of the explosion-proof valve body is S total , and S opening , S connection and S total meet: 10% connection /(S total -S opening )

公开(公告)号：EP4525169A1

公开(公告)日：2025-03-19

申请号：EP23802994.6

申请日：2023-05-11

Applicant: BYD Company Limited

Inventor： WANG, Xinyue ,  CHEN, Guangan ,  GAO, Xin ,  WANG, Cuicui ,  SUN, Zenan

IPC: H01M50/342 ,  H01M50/258 ,  H01M50/249

Abstract: A vehicle, comprising a battery pack. The battery pack comprises a battery or a battery module. The battery comprises an explosion-proof valve. The explosion-proof valve comprises an explosion-proof valve body. The explosion-proof valve body has an opening region, and the opening region is provided with an explosion-proof notched groove at the edge thereof. The explosion-proof notched groove comprises a first straight line section, two arc sections and at least one second straight line section. Two ends of the first straight line section are connected to the two arc sections, respectively; at least one of the ends of the second straight line section is connected to the arc section; and the first straight line section is arranged parallel to the second straight line section. In a depth direction of the explosion-proof notched groove, an orthographic projection of the opening region is in an oblong shape. An outer edge of the orthographic projection of the opening region is a predetermined opening boundary, and the area of the orthographic projection of the opening region is S, where S=a×b+π×b 2 /4, S≥80mm 2 , and b≥6mm.

公开(公告)号：EP4447210A1

公开(公告)日：2024-10-16

申请号：EP23745923.5

申请日：2023-01-10

Applicant: BYD Company Limited

Inventor： WAN, Long ,  LU, Zhipei ,  PENG, Qingbo ,  TAN, Zhijia ,  SUN, Zenan

IPC: H01M50/231

Abstract: The present disclosure discloses a protective plate for a battery pack, a battery pack and a vehicle. The protective plate includes a first fiber-resin composite layer, a metal layer and a buffering layer laminated in sequence.