公开(公告)号：US20240356012A1

公开(公告)日：2024-10-24

申请号：US18758271

申请日：2024-06-28

Applicant: Ningde Amperex Technology Limited

Inventor： Bing JIANG ,  Feng ZHOU ,  Qingwen ZHANG

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/583 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/0416 ,  H01M4/583 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: An electrochemical device includes a negative electrode. The negative electrode includes a negative current collector and a negative active material layer disposed on at least one surface of the negative current collector. In an infrared spectroscopy test, the negative active material layer exhibits at least a first peak and a second peak in a wavenumber range of 2500 cm−1 to 3200 cm−1. This indicates that the negative active material layer contains an additive, and the additive increases the production efficiency of the negative electrode, thereby increasing the production efficiency of the electrochemical device. In addition, the electrochemical device exhibits a high discharge capacity.

公开(公告)号：US20230275323A1

公开(公告)日：2023-08-31

申请号：US18300713

申请日：2023-04-14

Applicant: Ningde Amperex Technology Limited

Inventor： Bing JIANG ,  Kefei WANG

IPC: H01M50/491 ,  H01M10/0525 ,  H01M4/64 ,  H01M4/38 ,  H01M4/62 ,  H01M4/58

CPC classification number: H01M50/491 ,  H01M10/0525 ,  H01M4/64 ,  H01M4/386 ,  H01M4/625 ,  H01M4/58 ,  H01M4/622 ,  H01M2004/027

Abstract: An electrode plate includes a current collector and a membrane, where the membrane includes a primer layer provided on a surface of the current collector and an active substance layer provided on a surface of the primer layer, and the primer layer includes a first binder and a first conductive agent; where adhesion between the membrane and the current collector is greater than or equal to 20 N/m. This electrode plate can alleviate problems in the prior art such as easy film fall-off of the electrode plate due to low adhesion of part of the active material close to the surface of the electrode current collector.

公开(公告)号：US20230275226A1

公开(公告)日：2023-08-31

申请号：US18300794

申请日：2023-04-14

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Bing JIANG ,  Qingwen ZHANG ,  Changchao DU

IPC: H01M4/583 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/38

CPC classification number: H01M4/583 ,  H01M4/0404 ,  H01M4/622 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/38 ,  H01M2004/027

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, and an electrolyte, the negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, the negative electrode mixture layer includes a negative electrode active substance, there is specific adhesion strength for the negative electrode active substance, and the electrolyte includes propionate. The electrochemical apparatus has improved high-temperature storage performance and overcharge protection performance.

公开(公告)号：US20220123357A1

公开(公告)日：2022-04-21

申请号：US17485807

申请日：2021-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Bing JIANG

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/62 ,  H01M4/583 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/0567

Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, and the negative electrode mixture layer includes a negative electrode active substance. An elongation at a yield point of the negative electrode mixture layer and D50 of the negative electrode active substance satisfy a specified relationship, and the electrolyte includes a compound having a cyano group.

公开(公告)号：US20240274801A1

公开(公告)日：2024-08-15

申请号：US18436115

申请日：2024-02-08

Applicant: Ningde Amperex Technology Limited

Inventor： Bing JIANG ,  Tao LIU ,  Feng ZHOU ,  Qingwen ZHANG

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/139 ,  H01M10/0525 ,  H01M50/536

CPC classification number: H01M4/366 ,  H01M4/139 ,  H01M10/0525 ,  H01M50/536 ,  H01M2004/021

Abstract: An electrochemical device includes a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate. The first electrode plate includes a current collector, a tab, and an active layer. The tab is electrically connected to and extends out of the current collector. The active layer is disposed on a surface of the current collector. The active layer includes a first active layer and a second active layer. In a first direction, the first active layer is located on a side of the second active layer facing the tab, and is adjacent to or partially overlaps the second active layer. In a second direction, the first active layer and the second active layer extend in a strip shape. The cohesive force of the first active layer is greater than the cohesive force of the second active layer.

公开(公告)号：US20220123288A1

公开(公告)日：2022-04-21

申请号：US17215484

申请日：2021-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Bing JIANG ,  Kefei WANG

IPC: H01M4/38 ,  H01M4/66 ,  H01M10/0562 ,  H01M4/62

Abstract: A negative electrode includes a current collector and an active substance layer arranged on the current collector, and an ionic conductivity of the active substance layer is 0.01 S/m to 1 S/m. The ionic conductivity of the active substance layer is defined as 0.01 S/m to 1 S/m, so that the electrochemical device can meet requirements for fast charging, and meanwhile, lithium plating on a surface of the negative electrode of the electrochemical device can be inhibited in a fast-charging condition, ensuring safety performance of the electrochemical device.