公开(公告)号：US20230369636A1

公开(公告)日：2023-11-16

申请号：US18357408

申请日：2023-07-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xitong WANG ,  Daichun TANG ,  Xinxin DU ,  Honggang YU

IPC: H01M10/04 ,  H01M10/42 ,  H01M50/383 ,  H01M50/103

CPC classification number: H01M10/0431 ,  H01M10/4235 ,  H01M50/383 ,  H01M50/103

Abstract: An electrode assembly, a battery cell, a battery, and an electric device are described. The electrode assembly includes a first electrode plate, a second electrode plate, and a first insulation layer, the first electrode plate and the second electrode plate being wound to form the electrode assembly, where a winding terminating end of the first electrode plate exceeds a winding terminating end of the second electrode plate by at least half a turn so that the first electrode plate entirely covers an outer surface of an outermost turn of the second electrode plate, and the first insulation layer being applied on an outer surface of an outermost turn of the first electrode plate. According to this application, the terminating end of the first electrode plate is set to exceed the second electrode plate by at least half a turn.

公开(公告)号：US20250015250A1

公开(公告)日：2025-01-09

申请号：US18888349

申请日：2024-09-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Daichun TANG ,  Yaxi TIAN ,  Xitong WANG ,  Tingzhen JI ,  Yurun XIA ,  Xiangyan CHEN

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

Abstract: The present application provides a negative electrode plate and the method for preparing the same, a secondary battery, and an electrical device. The negative electrode plate includes a negative electrode current collector, and a negative electrode film layer arranged on at least one surface of the negative electrode current collector, wherein the negative electrode film layer comprises infiltrating cavity which opens in a direction away from the negative electrode current collector and extend in a first direction; and wherein the negative electrode film layer has a dimension in the first direction denoted as A in μm, the infiltrating cavity has a dimension in the first direction denoted as A1 in μm, and the negative electrode plate satisfies 0.1≤A1/A≤1, and optionally, 0.2≤A1/A≤1.