公开(公告)号：EP4345932A1

公开(公告)日：2024-04-03

申请号：EP22852334.6

申请日：2022-08-05

Applicant: BYD Company Limited

Inventor： YUAN, Xiaotao ,  XU, Zhan ,  CHEN, Peixing ,  WU, Xuanwei ,  HE, Kefeng

IPC: H01M4/13 ,  H01M4/139 ,  H01M10/0525

Abstract: An electrode, a preparation method for an electrode, and a battery are provided. The electrode includes n electrode plate layers sequentially stacked. The electrode plate layer close to a membrane side of the battery is the 1 st layer, and the electrode plate layer close to a current collector side is the n th layer. N is a natural number greater than or equal to 2. An electrode material of the electrode plate layer at the 1 st layer includes first particles, and an electrode material of the electrode plate layer at each layer from the 2 nd layer to the n th layer includes at least the first particles and second particles. An average particle size of the first particles is greater than an average particle size of the second particles. Porosity of the electrode plate layers gradually increases layer by layer in a direction from the n th layer to the 1 st layer.

公开(公告)号：EP4345952A1

公开(公告)日：2024-04-03

申请号：EP22848593.4

申请日：2022-07-27

Applicant: BYD Company Limited

Inventor： YUAN, Xiaotao ,  XU, Zhan ,  BAO, Chunxiao ,  GE, Liping ,  HE, Kefeng

IPC: H01M4/62

Abstract: A positive electrode and a battery are provided. The positive electrode includes a current collector layer and an active component layer. The active component layer covers at least one surface of the current collector layer. The active component layer includes an active material and a conductive component. The conductive component includes at least one of a one-dimensional conductive material, a zero-dimensional conductive material, and a two-dimensional conductive material.

公开(公告)号：EP4345933A1

公开(公告)日：2024-04-03

申请号：EP22872071.0

申请日：2022-09-22

Applicant: BYD Company Limited

Inventor： YUAN, Xiaotao ,  XU, Zhan ,  WU, Xuanwei ,  YE, Tao ,  HE, Kefeng

IPC: H01M4/13 ,  H01M4/62

Abstract: A lithium-ion battery electrode, a preparation method thereof, and a lithium-ion battery are disclosed. The electrode includes a current collector and n electrode plate layers laminated on the current collector, n being an integer greater than or equal to 2. The electrode plate layer contains a pore-forming agent. A content of the pore-forming agent in the electrode plate layers gradually increases along a direction gradually away from the current collector. The pore-forming agent is selected from an electrolyte solution additive which is solid at normal temperature.

公开(公告)号：EP4550439A1

公开(公告)日：2025-05-07

申请号：EP23830371.3

申请日：2023-06-28

Applicant: BYD Company Limited

Inventor： SUN, Huajun ,  YUAN, Xiaotao ,  HE, Kefeng ,  XU, Zhan ,  GE, Liping

IPC: H01M4/13

Abstract: A secondary battery electrode plate and a preparation method therefor, and a secondary battery. The secondary battery electrode plate comprises a current collector and a first active material layer, wherein the first active material layer is located on a surface of the current collector and contains first active substance particles, and the first active substance particles have an equivalent sphericity X 1 as represented by formula X 1 = 3/(S 1 R 1 ρ 1 ), where 0.05 ≤ X 1 ≤ 0.8; R 1 is the median radius of the first active substance particles in the unit of µm; S 1 is the specific surface area of the first active substance particles in the unit of m 2 /g; and ρ 1 is the true density of the first active substance particles in the unit of g/cm 3 .

公开(公告)号：EP4489094A1

公开(公告)日：2025-01-08

申请号：EP23762991.0

申请日：2023-03-03

Applicant: BYD Company Limited

Inventor： GE, Liping ,  HAO, Rong ,  ZHUANG, Minghao ,  SU, Bizhe ,  XU, Zhan

IPC: H01M4/13 ,  H01M4/139

Abstract: An electrode plate and a method for preparation therefor, and a lithium battery are provided. The electrode plate includes an electrode active material layer. The electrode active material layer includes a three-dimensional conductive network base, and an electrode active material and a binder that are loaded on the three-dimensional conductive network base. The three-dimensional conductive network base and the electrode active material satisfy a relational expression below: d × 6 D 2 × m ρ / πD 3 6 ≤ V ≤ D 3 − πD 3 6 × m ρ / πD 3 6 where V is an actual volume of the three-dimensional conductive network base, whose unit is cm 3 ; m is mass of the electrode active material, whose unit is g; D is a D50 particle size of the electrode active material, whose unit is µm; ρ is true density of the electrode active material, whose unit is g/cm 3 ; and d is a thickness of a single carbon atom layer, and a value of d is 0.334 nm.