公开(公告)号：US20240194952A1

公开(公告)日：2024-06-13

申请号：US18411755

申请日：2024-01-12

Applicant: Ningde Amperex Technology Limited

Inventor： Weiyuan ZHOU ,  Hai LONG ,  Zhifang DAI ,  Qingwen ZHANG

IPC: H01M10/0587 ,  H01M4/04 ,  H01M10/0525

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

Abstract: An electrochemical apparatus includes a battery cell formed by a first electrode plate, a separator, and a second electrode plate through winding, where the first electrode plate includes a current collector, a tab, and an active substance layer. The current collector includes a first surface facing toward the interior of the battery cell and a second surface facing away from the interior of the battery cell; the tab is electrically connected to the current collector and extends out of the current collector; and the active substance layer is provided on the first surface and the second surface of the current collector. A winding start end of the first electrode plate is provided as a single-sided zone, an insulating coating is provided on the first surface of the current collector located in the single-sided zone, and the active substance layer is provided on the second surface.

公开(公告)号：US20250054973A1

公开(公告)日：2025-02-13

申请号：US18921499

申请日：2024-10-21

Applicant: Ningde Amperex Technology Limited

Inventor： Weiyuan ZHOU ,  Sen ZHANG ,  Yajie LI

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/583 ,  H01M4/62 ,  H01M4/66

Abstract: A winding single-sided region starting section of a first current collector, a surface facing the center of an electrode assembly is provided with a first protective layer and a surface facing away from the center of the electrode assembly is provided with a first active material layer; and for a winding single-sided region ending section of a second current collector, a surface facing away from the center of the electrode assembly is provided with a second protective layer, and a surface facing the center of the electrode assembly is provided with a second active material layer. A ratio of a unit area weight of the first protective layer to a unit area weight of the first active material layer is (0.03-0.75):1, and a ratio of a unit area weight of the second protective layer to a unit area weight of the second active material layer is (0.03-0.75):1.