公开(公告)号：US20240413339A1

公开(公告)日：2024-12-12

申请号：US18396949

申请日：2023-12-27

Applicant: BYD COMPANY LIMITED

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

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/36

Abstract: A 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：US20240290970A1

公开(公告)日：2024-08-29

申请号：US18399468

申请日：2023-12-28

Applicant: BYD COMPANY LIMITED

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

IPC: H01M4/58 ,  H01M4/02 ,  H01M4/1397

CPC classification number: H01M4/5825 ,  H01M4/1397 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028

Abstract: An electrode includes n electrode plate layers sequentially stacked. The electrode plate layer close to a membrane side of the battery is the 1st layer, and the electrode plate layer close to a current collector side is the nth layer. N is a natural number greater than or equal to 2. An electrode material of the electrode plate layer at the 1st layer includes first particles, and an electrode material of the electrode plate layer at each layer from the 2nd layer to the nth 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 nth layer to the 1st layer.

公开(公告)号：US20240154121A1

公开(公告)日：2024-05-09

申请号：US18404634

申请日：2024-01-04

Applicant: BYD COMPANY LIMITED

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

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391

CPC classification number: H01M4/62 ,  H01M4/043 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/623 ,  H01M4/625

Abstract: A lithium-ion battery 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：US20220255066A1

公开(公告)日：2022-08-11

申请号：US17614285

申请日：2020-05-27

Applicant: BYD COMPANY LIMITED

Inventor： Yi PAN ,  Rong HAO ,  Na CHEN ,  Xiaotao YUAN

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505

Abstract: Disclosed herein are a composite cathode material for a lithium-ion battery, a lithium-ion battery, and a vehicle. A core of the cathode material is a lithium-nickel-cobalt-manganese oxide material. A surface layer of the cathode material is a lithium-nickel-cobalt oxide material doped with an element E. There is a transition layer between the core and the surface layer. The transition layer is a lithium-nickel-cobalt-manganese oxide material doped with the element E. A content of the element E in the transition layer shows a decreasing trend in a direction from the surface layer of the cathode material to the core. A general formula for the composition of the transition layer is Li1+mNi1-x-y-zCoxMnyEzO2. 0≤m≤0.1, 0.01≤x≤0.1, 0.01≤y≤0.1, and 0.01≤z≤0.1. E is at least one of Al, Zr, Ti, Y, Ba or Sr.