公开(公告)号：EP4535530A1

公开(公告)日：2025-04-09

申请号：EP23815130.2

申请日：2023-05-29

Applicant: BYD Company Limited

Inventor： WAN, Long ,  LU, Zhipei ,  PENG, Qingbo ,  ZHU, Yan ,  TAN, Zhijia

IPC: H01M50/231 ,  H01M50/224 ,  H01M50/233 ,  H01M50/242 ,  H01M50/249

Abstract: A battery protective bottom plate, a battery pack composite protective structure and a vehicle. The battery protective bottom plate comprises an upper fiber reinforced resin layer, a metal plate and a lower fiber reinforced resin layer, wherein the metal plate is located between the upper fiber reinforced resin layer and the lower fiber reinforced resin layer, and the following condition is satisfied: (I) 1 ≤ ρ 2 ∗ d 1 + d 2 + d 3 / d 2 ρ 2 + ρ 1 ∗ d 1 + ρ 3 ∗ d 3 / d 1 + d 3 ∗ σ 1 ∗ d 1 + σ 3 ∗ d 3 / d 1 + d 3 σ 2 ≤ 2 .

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.

公开(公告)号：EP4535534A1

公开(公告)日：2025-04-09

申请号：EP23815131.0

申请日：2023-05-29

Applicant: BYD Company Limited

Inventor： WAN, Long ,  LU, Zhipei ,  PENG, Qingbo ,  TAN, Zhijia ,  LI, Jianqiang

IPC: H01M50/244 ,  H01M50/24 ,  H01M50/231

Abstract: A battery protection bottom plate, a composite protection structure for a battery pack, and a vehicle. The battery protection bottom plate comprises an upper fiber reinforced resin layer, a metal plate, a fiber reinforced resin frame, and a lower fiber reinforced resin layer; the metal plate and the fiber reinforced resin frame are located between the upper fiber reinforced resin layer and the lower fiber reinforced resin layer; the metal plate is located inside the fiber reinforced resin frame; the top surface of the fiber reinforced resin frame is integrally connected to the upper fiber reinforced resin layer; the bottom surface of the fiber reinforced resin frame is integrally connected to the lower fiber reinforced resin layer.

公开(公告)号：EP4535535A1

公开(公告)日：2025-04-09

申请号：EP23815138.5

申请日：2023-05-29

Applicant: BYD Company Limited

Inventor： WAN, Long ,  PENG, Qingbo ,  TAN, Zhijia ,  LEI, Song ,  YANG, Shenglin

IPC: H01M50/244 ,  H01M50/242 ,  H01M50/231 ,  H01M50/218 ,  H01M50/249

Abstract: A battery protection bottom plate, a composite protection structure for a battery pack, and a vehicle. The battery protection bottom plate comprises an upper fiber-reinforced resin layer, a metal plate and a lower fib er-reinforced resin layer, the metal plate being located between the upper fiber-reinforced resin layer and the lower fiber-reinforced resin layer. The upper fiber-reinforced resin layer and the lower fiber-reinforced resin layer meet the following conditions: 0.4≤d 2 /d 1 ≤2, wherein d 1 is the thickness of the lower fiber-reinforced resin layer measured in mm, and d 2 is the thickness of the upper fiber-reinforced resin layer measured in mm.

公开(公告)号：EP4535531A1

公开(公告)日：2025-04-09

申请号：EP23815139.3

申请日：2023-05-29

Applicant: BYD Company Limited

Inventor： WAN, Long ,  LU, Zhipei ,  PENG, Qingbo ,  ZHU, Yan ,  TAN, Zhijia

IPC: H01M50/231 ,  H01M50/224 ,  H01M50/233 ,  H01M50/242 ,  H01M50/249

Abstract: A battery pack composite protection structure and a vehicle. The battery pack composite protection structure comprises a battery pack and a battery protection bottom plate, the battery protection bottom plate comprising a metal plate; the battery protection bottom plate is located below the battery pack, a buffer zone being formed between the battery pack and the battery protection bottom plate; the buffer zone and the metal plate satisfy the following conditions: (I), d is the thickness of the metal plate in mm; σ is the tensile strength of the metal plate in MPa; ε is the elongation at break of the metal plate; and h is the height of the buffer zone, in mm.

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.