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.

公开(公告)号：US20240339734A1

公开(公告)日：2024-10-10

申请号：US18750296

申请日：2024-06-21

Applicant: Ningde Amperex Technology Limited

Inventor： Sen ZHANG ,  ZhiFang DAI ,  Hai LONG ,  Qingwen ZHANG

IPC: H01M50/538 ,  H01M10/04 ,  H01M10/0587

CPC classification number: H01M50/538 ,  H01M10/0431 ,  H01M10/0587

Abstract: An electrochemical device includes an electrode assembly. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator. A plurality of first tabs are disposed on the first electrode plate. The separator is disposed between the first and second electrode plates. The first electrode plate, the separator, and the second electrode plate are stacked and wound. The first tabs are connected to a region of the first electrode plate other than first inner layers and first outer layers. The first inner layers include N layers along a direction from a start layer to an end layer of the first electrode plate. The first outer layers include M layers starting from the end layer of the first electrode plate along a direction from the end layer to the start layer of the first electrode plate, where M≥1, and N≥3.