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公开(公告)号：US20240234725A1
公开(公告)日：2024-07-11
申请号：US18523957
申请日：2023-11-30
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.
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公开(公告)号：US20240283028A1
公开(公告)日：2024-08-22
申请号：US18704135
申请日：2022-12-22
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.
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公开(公告)号：US20240222685A1
公开(公告)日：2024-07-04
申请号：US18574031
申请日：2022-12-30
发明人： Xuhui ZHANG , Baoyu WANG , Hui CHEN , Yao ZHANG
IPC分类号： H01M10/04 , H01M4/136 , H01M10/0525 , H01M10/0567 , H01M10/42
CPC分类号： H01M10/0468 , H01M4/136 , H01M10/0567 , H01M10/42 , H01M10/0525 , H01M2010/4292
摘要： Disclosed are a secondary battery and an electrical device. The secondary battery includes a positive electrode plate and a negative electrode plate, and the secondary battery satisfies 0.258≤CB/PD≤0.700.
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公开(公告)号：US20240313267A1
公开(公告)日：2024-09-19
申请号：US18712766
申请日：2022-12-29
发明人： Yao ZHANG , Mingwang WANG , Xuhui ZHANG , Baoyu WANG , Hui CHEN
IPC分类号： H01M10/42 , H01M4/131 , H01M4/133 , H01M4/136 , H01M10/0525
CPC分类号： H01M10/42 , H01M4/131 , H01M4/133 , H01M4/136 , H01M10/0525 , H01M2010/4292
摘要： A secondary battery and an electrical device are disclosed. The secondary battery includes: a positive electrode plate including both a positive current collector and a positive active material layer disposed on the positive current collector; and a negative electrode plate including both a negative current collector and a negative active material layer disposed on the negative current collector; where the secondary battery satisfies: 0.5≤(σ1/σ2)/CB≤9.4. The present application balances rates of deintercalating lithium of the positive electrode plate and the negative electrode plate by defining a relationship between a surface density and a Cell Balance (CB) value, so as to prevent the secondary battery from lithium plating or from decreasing the capacity during its operation, thereby increasing the life of the secondary battery.
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公开(公告)号：US20240105909A1
公开(公告)日：2024-03-28
申请号：US18522315
申请日：2023-11-29
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.
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