公开(公告)号：US20240006597A1

公开(公告)日：2024-01-04

申请号：US18467973

申请日：2023-09-15

Applicant: Ningde Amperex Technology Limited

Inventor： Dou YING ,  Shengqi LIU ,  Kefei WANG

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/62 ,  H01M50/124 ,  H01M50/122

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M4/623 ,  H01M50/124 ,  H01M50/122 ,  H01M2004/021

Abstract: An electrochemical device includes an electrode plate, the electrode plate includes: a first current collector; a first tab protruding from the first current collector; a first active material layer disposed on at least one surface of the first current collector; and an insulation layer disposed along a side edge of the first current collector towards the first tab and abutted against the first active material layer. The insulation layer includes a first region and a second region, the first region is disposed towards the first tab, the second region is disposed away from the first tab and abutted against the first active material layer, and a thickness of the first region of the insulation layer is less than a thickness of the second region of the insulation layer.

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.

公开(公告)号：US20230395787A1

公开(公告)日：2023-12-07

申请号：US18454363

申请日：2023-08-23

Applicant: Ningde Amperex Technology Limited

Inventor： Shengqi LIU ,  Xiaohu CAI ,  Kefei WANG ,  Qingwen ZHANG

IPC: H01M4/36 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M2004/028

Abstract: An electrochemical device includes a positive electrode, the positive electrode includes a current collector and a film layer containing a positive active material. The film layer is disposed on at least one surface of the current collector. The positive active material includes a primary particle and/or a secondary particle. When a mass percent A of the primary particle in the positive active material based on a mass of the positive active material satisfies 20%≤A≤100%, the film layer, the positive active material, and the current collector satisfy: Dl≥Dv99−Dc; and, when a mass percent A′ of the primary particle in the positive active material based on the mass of the positive active material satisfies 0≤A′≤20%, the film layer, the positive active material, and the current collector satisfy: Dl≥1.1 Dv99.

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.