公开(公告)号：US20230170484A1

公开(公告)日：2023-06-01

申请号：US18069187

申请日：2022-12-20

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Quanguo LI ,  Qian LIU ,  Yonghuang YE ,  Jianfu HE ,  Fajun HUANG ,  Chunpeng YU ,  Dejun XIAO

IPC分类号： H01M4/62 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525

CPC分类号： H01M4/623 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/625 ,  H01M2004/028

摘要： A positive electrode sheet includes a current collector, a resistance layer disposed on the current collector, and a positive electrode active material layer. The current collector includes a coating region and a non-coating region. The resistance layer includes a conductive agent and a first binder. The positive electrode active material layer includes a positive electrode active material, a conductive agent, and a second binder. A resistance of the resistance layer is greater than a resistance of the positive electrode active material layer. In a cross section of the positive electrode sheet, a projection of a part of the positive electrode active material layer on the current collector overlaps with a projection of the resistance layer on the current collector, and a projection of another part of the positive electrode active material layer on the current collector does not overlap with the projection of the resistance layer on the current collector.

公开(公告)号：US20240186479A1

公开(公告)日：2024-06-06

申请号：US18441607

申请日：2024-02-14

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Dejun XIAO ,  Chunpeng YU ,  Jiahua CHEN ,  Quanguo LI ,  Jingxuan SUN ,  Qian LIU

IPC分类号： H01M4/04 ,  H01M4/02 ,  H01M10/647 ,  H01M50/209 ,  H01M50/249

CPC分类号： H01M4/0404 ,  H01M10/647 ,  H01M50/209 ,  H01M50/249 ,  H01M2004/021 ,  H01M2004/027

摘要： A negative electrode plate includes a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector. The negative electrode film layer includes a middle coating region and edge coating regions located on two opposite sides of the middle coating region. Thickness A1 of the edge coating region in a fully-discharged state, thickness B1 of the edge coating region in a fully-charged state, thickness A2 of the middle coating region in the fully-discharged state, and thickness B2 of the middle coating region in the fully-charged state satisfy (B1−A1)/A1>(B2−A2)/A2.