公开(公告)号：US11695160B2

公开(公告)日：2023-07-04

申请号：US16254865

申请日：2019-01-23

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Qiang Tao ,  Chao Gao ,  Qiang Zheng ,  Zhanzhao Fang

IPC: H01M10/05 ,  H01M4/04 ,  H01M4/13 ,  H01M10/0587 ,  H01M4/131 ,  H01M4/1391 ,  H01M10/0525

CPC classification number: H01M10/0587 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/1391 ,  H01M10/0525

Abstract: The present application relates to an electrochemical device. Specifically, the present application provides a cell, wherein the cell is formed by winding or stacking a first electrode and a second electrode which are arranged at an interval, and a separator is disposed between the first electrode and the second electrode. Wherein the first electrode includes a first current collector, and the first current collector includes a coated region coated with a first active material and an uncoated region without the first active material; the uncoated region is at least partially provided with an insulating layer. The adhesion between the insulating layer and the first current collector is not less than about 0.5 N/m. The electrochemical device provided by the present application has improved safety performance.

公开(公告)号：US12166213B2

公开(公告)日：2024-12-10

申请号：US16365449

申请日：2019-03-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Qiang Zheng ,  Qi Dang ,  Zhanzhao Fang ,  Qiang Tao

IPC: H01M4/66 ,  H01M10/0587 ,  H01M50/449 ,  H01M50/534 ,  H01M50/536

Abstract: The present application relates to an electrode sheet, a battery cell and a battery. The electrode sheet includes a current collector and a protective layer. The current collector includes a coated region provided with an active material layer and an uncoated region without being provided with the active material layer. The protective layer is provided on at least a part of a surface of the uncoated region, and has a porosity of 0% to 95%. For the electrode sheet according to the present application, by providing the current collector with the protective layer, the contact resistance may be increased when the electrode sheet is short-circuited, and the discharge power and the thermal runaway probability of the battery cell may be reduced when the battery cell is internally short-circuited, thereby improving the safety performance of the battery cell.