公开(公告)号：US20240339621A1

公开(公告)日：2024-10-10

申请号：US18746076

申请日：2024-06-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Kaiming Deng ,  Lei Lu ,  Yalong Wang ,  Zheng Wang ,  Linzhen Yu ,  Changyuan Hu ,  Shisong Li ,  Shunhao Dai

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/04

CPC classification number: H01M4/623 ,  H01M4/0411 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028

Abstract: Provided are a secondary battery including an electrode sheet, the electrode sheet including: a current collector and an active material layer; the active material layer is provided on at least one surface of the current collector; the active material layer is divided into a first region and a second region in its thickness direction; the first region is located in a direction close to the surface of the current collector, the thickness of the first region accounts for ½ of the thickness of the active material layer, the binder content in the first region is denoted as A; the second region is located in a direction away from the surface of the current collector, the thickness of the second region accounts for ½ of the thickness of the active material layer, and the binder content in the second region is denoted as B; the electrode sheet satisfies: 1