公开(公告)号：US20240234725A1

公开(公告)日：2024-07-11

申请号：US18523957

申请日：2023-11-30

申请人： Sunwoda Mobility Energy Technology Co., Ltd.

发明人： Peng LIU ,  Man LI ,  Yun CHEN ,  Chunbo CHU

IPC分类号： H01M4/583 ,  H01M10/0525

CPC分类号： H01M4/583 ,  H01M10/0525 ,  H01M2004/027

摘要： Disclosed are batteries and electrical apparatuses. Non-faradaic capacitance of the negative electrode plate is Cdl nF, the sphericity of the negative active material contained in the negative electrode plate is S, and Cdl and S satisfy 0.5≤Cdl×S≤5. By adjusting Cdl value and sphericity S, so that they are in the range of 0.5≤Cdl×S≤5, which can effectively reduce the specific surface area of the negative active material, increase the tap density, so that the negative electrode plate has a high tap density without causing overpressure phenomenon. Furthermore, the mechanical stress experienced by the negative active materials of the negative electrode plate during rolling is minimized, and the reaction area with the electrolyte is minimized, it has good liquid retention properties, thereby avoiding the occurrence of gas generation and swelling, so that the batteries have excellent rate performance and cycle performance.

公开(公告)号：US20240283028A1

公开(公告)日：2024-08-22

申请号：US18704135

申请日：2022-12-22

申请人： SUNWODA MOBILITY ENERGY TECHNOLOGY CO., LTD.

发明人： Peng LIU ,  Yun CHEN ,  Man LI ,  Guoxian LV ,  Chunbo CHU

IPC分类号： H01M10/0567 ,  H01M4/02 ,  H01M4/133 ,  H01M4/587

CPC分类号： H01M10/0567 ,  H01M4/133 ,  H01M4/587 ,  H01M2004/027 ,  H01M2300/0025

摘要： A secondary battery and a power consumption device are provided in the present application. The secondary battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte solution. The negative electrode plate has a non-faradaic capacitance Cdl nF satisfying 1≤Cdl≤5. The electrolyte solution includes an additive, and the additive includes a silicon-containing compound. In the present application, by reasonably adjusting the relationship between the non-faradaic capacitance of the negative electrode plate and content of the additive in the electrolyte solution, the secondary battery has characteristics of high capacity and rapid charging.

公开(公告)号：US20240105909A1

公开(公告)日：2024-03-28

申请号：US18522315

申请日：2023-11-29

申请人： Sunwoda Mobility Energy Technology Co., Ltd.

发明人： Man LI ,  Yun CHEN ,  Peng LIU ,  Chunbo CHU

IPC分类号： H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0568 ,  H01M10/42

CPC分类号： H01M4/133 ,  H01M4/366 ,  H01M4/587 ,  H01M10/0568 ,  H01M10/4235 ,  H01M2004/027

摘要： A secondary battery and an electrochemical device are provided. The secondary battery includes a positive electrode plate, a separator, an electrolyte solution, and a negative electrode plate. The negative electrode plate includes a negative electrode current collector, and a negative electrode active material layer disposed on the negative electrode current collector. Non-faradaic electric quantity Q C of the negative electrode plate satisfies: 0.05≤Q≤2.5, wherein Q=Cdl×ΔU, Cdl nF is non-faradaic capacitance of the negative electrode plate, and ΔU V is potential interval of the negative electrode active material layer.