公开(公告)号：US20250023058A1

公开(公告)日：2025-01-16

申请号：US18901099

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Dongdong HAN ,  Qingwen ZHANG ,  Xiaoqian LIU

IPC: H01M4/66 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M10/42

Abstract: An electrochemical device, including a positive electrode, where the positive electrode includes a positive electrode current collector, a first protective layer, and a first positive electrode active material layer. The positive electrode current collector includes a first surface and a second surface opposite to each other, and the first protective layer is disposed between the first surface and the first positive electrode active material layer. The first surface includes a first region and a second region, where the first region is provided with the first positive electrode active material layer, and the second region is not provided with the first positive electrode active material layer. An area of the first region is A1 cm2, an area of the second region is A2 cm2, and an area of the first protective layer is A3 cm2, satisfying: 0.5≤A3/(A1+A2)≤1. The electrochemical device of this application has significantly improved safety performance.

公开(公告)号：US20230343962A1

公开(公告)日：2023-10-26

申请号：US18320486

申请日：2023-05-19

Applicant: Ningde Amperex Technology Limited

Inventor： Dongdong HAN

IPC: H01M4/66 ,  H01M4/62

CPC classification number: H01M4/622 ,  H01M4/667 ,  H01M2004/028

Abstract: A positive electrode, including a positive electrode current collector, a positive electrode active material layer, and a coating, where the positive electrode active material layer and the coating are provided on a surface of the positive electrode current collector, and adhesion between the coating and the positive electrode current collector is greater than or equal to 5 N/m. The coating is provided, the coating and the positive electrode current collector are designed, and the adhesion of the coating to the positive electrode current collector is improved so that the safety performance of electrode assemblies containing such positive electrode can be effectively improved. When the electrochemical apparatus is impacted or penetrated by an external force, the coating with high adhesion can improve the structural stability of the electrode assembly containing the coating and reduce the occurrence of short circuits between electrode plates, thereby improving safety performance of the electrochemical apparatus.

公开(公告)号：US20250030002A1

公开(公告)日：2025-01-23

申请号：US18901390

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Xingyong WANG ,  Dongdong HAN ,  Kefei WANG

IPC: H01M4/62 ,  H01M10/052 ,  H01M10/0587

Abstract: An electrochemical apparatus includes an electrode assembly. The electrode assembly includes an electrode plate; the electrode plate includes a current collector; the current collector includes a first region and a second region; an active material layer is arranged on the first region; and a functional layer is arranged on the second region, and the functional layer includes an organic polymer and inorganic particles, where the thickness of the functional layer is H1, where 1 μm≤H1≤15 μm; and Dv90 of the inorganic particles satisfies: 1 μm≤Dv90≤4.5 μm.

公开(公告)号：US20230261186A1

公开(公告)日：2023-08-17

申请号：US18302268

申请日：2023-04-18

Applicant: Ningde Amperex Technology Limited

Inventor： Xiaohu CAI ,  Shengqi LIU ,  Dongdong HAN ,  Kefei WANG

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/131

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M2004/028

Abstract: A positive electrode and an electrochemical apparatus and an electronic apparatus containing the same. A positive electrode, the positive electrode including a current collector and a positive electrode active substance layer are disposed on the current collector, where the positive electrode active substance layer includes a positive electrode active material and graphene; and a ratio Dv50/D1 of a particle size Dv50 of the positive electrode active material to a sheet diameter D1 of the graphene is 0.45-4.5.

公开(公告)号：US20240243265A1

公开(公告)日：2024-07-18

申请号：US18621801

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Dongdong HAN ,  Qingwen ZHANG ,  Shengqi LIU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M4/366 ,  H01M4/623 ,  H01M10/0567 ,  H01M2004/028 ,  H01M10/0525 ,  H01M2300/0025

Abstract: A positive electrode includes a current collector and a positive electrode active material layer. The positive electrode active material layer is located on at least one surface of the current collector and includes a first positive electrode active material layer and a second positive electrode active material layer. The first positive electrode active material layer is located between the current collector and the second positive electrode active material layer, where an adhesion force between the current collector and the first positive electrode active material layer is F1 N/m, and a cohesion force of the second positive electrode active material layer is F2 N/m, the positive electrode satisfying F1/F2≥6.

公开(公告)号：US20230275273A1

公开(公告)日：2023-08-31

申请号：US18300727

申请日：2023-04-14

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Dongdong HAN ,  Jun GUO ,  Shengqi LIU

IPC: H01M10/0567 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0568

CPC classification number: H01M10/0567 ,  H01M4/0404 ,  H01M4/625 ,  H01M10/0568 ,  H01M2004/021

Abstract: An electrochemical apparatus includes an electrode and an electrolyte. The electrode includes a current collector, an intermediate layer disposed on the current collector, and an active material layer disposed on the intermediate layer. The intermediate layer has a specific area ratio to the active material layer. The electrolyte includes a sulfur-oxygen double bond-containing compound. The electrochemical apparatus has improved direct current internal resistance and safety performance.