公开(公告)号：US20230275228A1

公开(公告)日：2023-08-31

申请号：US18129360

申请日：2023-03-31

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wei Tao ,  Ruitao Wu ,  Fei Wu

IPC: H01M4/587 ,  H01M4/133

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M2004/021

Abstract: An electrochemical device includes a positive electrode plate which includes a positive active material layer and a negative electrode plate which includes a negative current collector, a first negative active material layer, and a second negative active material layer. In a length direction, the first negative active material layer includes a first edge and a second edge opposite to the first edge. In the length direction, the second negative active material layer includes a third edge and a fourth edge opposite to the third edge. In the length direction, the positive active material layer includes a fifth edge and a sixth edge opposite to the fifth edge. The third edge protrudes beyond the first edge and the fifth edge in the length direction. A distance between the first edge and the fifth edge in the length direction of the negative electrode plate is less than 2 mm.

公开(公告)号：US20230327218A1

公开(公告)日：2023-10-12

申请号：US18181209

申请日：2023-03-09

Applicant: Ningde Amperex Technology Limited

Inventor： Ting Guan ,  Ruitao Wu ,  Shan Zhu ,  Fei Wu

IPC: H01M50/538 ,  H01M10/0525 ,  H01M10/0587

CPC classification number: H01M10/0587 ,  H01M10/0525 ,  H01M50/538 ,  H01M2220/30

Abstract: An electrochemical apparatus includes an electrode assembly, where the electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator for separating the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode current collector, a positive electrode active material layer, and a non-active material layer. The positive electrode active material layer is formed on a surface of the positive electrode current collector, and the non-active material layer is formed on a surface of the positive electrode active material layer away from the positive electrode current collector. In a first direction, the non-active material layer has a thickness of 1 µm to 20 µm, where the first direction is a thickness direction of the positive electrode current collector. A diffusion rate of lithium ions in the non-active material layer is less than that in the positive active material layer.