-
公开(公告)号：US12107220B2
公开(公告)日：2024-10-01
申请号：US18626867
申请日：2024-04-04
发明人： Kefei Wang , Qiao Zeng , Liangzhen Xiao , Fei Wu
IPC分类号： H01M10/0566 , H01M4/13 , H01M4/64 , H01M4/70 , H01M10/0525 , H01M10/0567 , H01M10/0569
CPC分类号： H01M10/0566 , H01M4/13 , H01M4/64 , H01M4/70 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M2300/0025 , H01M2300/0034 , H01M2300/0037
摘要： An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 6, about 30 wt %≤Z≤about 50 wt %, and about 0.01≤(Y/Z)≤about 0.3; wherein the dinitrile compound is one or more compounds selected from adiponitrile, 1,4-dicyano-2-butene, and ethylene glycol bis(2-cyanoethyl) ether; and the trinitrile compound is one or more compounds selected from 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile; 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile; 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane; 1,1,1-tris(cyanoethoxymethylene)ethane; 1,1,1-tris(cyanoethoxymethylene)propane; 3-methyl-1,3,5-tris(cyanoethoxy)pentane; 1,2,7-tris(cyanoethoxy)heptane; 1,2,6-tris(cyanoethoxy)hexane; 1,2,5-tris(cyanoethoxy)pentane; and any combination thereof.
-
公开(公告)号：US20230327218A1
公开(公告)日：2023-10-12
申请号：US18181209
申请日：2023-03-09
IPC分类号： H01M50/538 , H01M10/0525 , H01M10/0587
CPC分类号： H01M10/0587 , H01M10/0525 , H01M50/538 , H01M2220/30
摘要： 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.
-
公开(公告)号：US11769910B2
公开(公告)日：2023-09-26
申请号：US18076882
申请日：2022-12-07
发明人： Kefei Wang , Qiao Zeng , Liangzhen Xiao , Fei Wu
IPC分类号： H01M4/64 , H01M4/13 , H01M10/0566 , H01M10/0525 , H01M10/0567 , H01M10/0569
CPC分类号： H01M10/0566 , H01M4/13 , H01M4/64 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M2300/0025 , H01M2300/0034 , H01M2300/0037
摘要： An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2.2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 2.3, about 5 wt %≤Z≤about 50 wt %, 1 wt %
-
公开(公告)号：US10833363B2
公开(公告)日：2020-11-10
申请号：US16211853
申请日：2018-12-06
发明人： Kefei Wang , Qiao Zeng , Liangzhen Xiao , Fei Wu
IPC分类号： H01M10/0566 , H01M10/0525 , H01M4/13
摘要： The present application relates to an electrolyte and an electrochemical device comprising the electrolyte. The electrolyte comprises a dinitrile compound, a trinitrile compound, and propyl propionate, wherein, based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %≤(X+Y)≤about 11 wt % . . . (1), about 0.1≤(X/Y)≤about 8 . . . (2)}. The electrolyte of the present application is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.
-
公开(公告)号：US12095299B2
公开(公告)日：2024-09-17
申请号：US17033835
申请日：2020-09-27
IPC分类号： H02J7/00
CPC分类号： H02J7/0048 , H02J7/0071 , H02J7/00712 , H02J7/007182
摘要： A method for charging a battery includes charging the battery with a charging current at a constant current during an mth charge and discharge cycle; a first state of charge SOC1 of the battery when the constant current charging phase in any one charge and discharge cycle ends is the same as a standard state of charge SOC0, SOCb≤SOC0≤SOCa+k. SOCa is a state of charge or a preset value of the battery at the end of the constant current charging phase during an nth charge and discharge cycle, SOCb is a state of charge or a preset value of the battery at the end of the constant current charging phase during an (m−1)th charge and discharge cycle, SOCb≤SOC0≤SOCa+k, 0≤k≤10%, and SOCa+k≤100%.
-
公开(公告)号：US12088136B2
公开(公告)日：2024-09-10
申请号：US17281355
申请日：2019-10-21
CPC分类号： H02J7/007182 , H01M10/44 , H01M10/48 , H02J7/0049 , H02J7/00714
摘要： A method of charging a battery, including: in an mth charge and discharge cycle, constant-current charging a battery to a first cut-off voltage Um at a charging current, where m is any two or more integers of 1, 2, 3, . . . , x, and Um has different values in at least two charge and discharge cycles. The method shortens fully charged time of a battery and further ensure that phenomena of lithium precipitation and overcharge do not occur on the battery, thereby prolonging a service life of the battery.
-
公开(公告)号：US20230275228A1
公开(公告)日：2023-08-31
申请号：US18129360
申请日：2023-03-31
CPC分类号： H01M4/587 , H01M4/133 , H01M2004/021
摘要： 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：US11611111B2
公开(公告)日：2023-03-21
申请号：US16454875
申请日：2019-06-27
发明人： Kefei Wang , Fei Wu , Jinli Wang , Jibin Geng
IPC分类号： H01M10/0587 , H01M10/04 , H01M10/0525 , H01M50/538 , H01M50/466 , H01M50/536
摘要： A cell includes a flat electrode assembly formed by superposing and winding respective first ends of a first electrode sheet, a first separator, a second electrode sheet, and a second separator. A first electrode tab is connected to the first electrode sheet, and a second electrode tab is connected to the second electrode sheet. The second electrode sheet includes a second current collector, a second outer membrane arranged on a surface facing away from a center of the cell, and a second inner membrane arranged on a surface facing the center of the cell. Respective starting ends of the second outer membrane and the second inner membrane are located on the second current collector between the first end of the second electrode sheet and a second bend. The second inner membrane is provided with an inner uncoated region at least at the second bend.
-
公开(公告)号：US11522222B2
公开(公告)日：2022-12-06
申请号：US17064782
申请日：2020-10-07
发明人： Kefei Wang , Qiao Zeng , Liangzhen Xiao , Fei Wu
IPC分类号： H01M10/0566 , H01M10/0525 , H01M10/0567 , H01M10/0569
摘要： An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %≤(X+Y)≤about 11 wt % . . . (1), about 0.1≤(X/Y)≤about 8 . . . (2)}. The electrolyte further includes at least one selected from the group consisting of a cyclic carbonate ester having a carbon-carbon double bond, a fluorinated chain carbonate ester, a fluorinated cyclic carbonate ester, and a compound having a sulfur-oxygen double bond. The electrolyte is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.
-
公开(公告)号：US10955484B2
公开(公告)日：2021-03-23
申请号：US16214746
申请日：2018-12-10
发明人： Fei Wu , Juan Jin , Kefei Wang
IPC分类号： G01R31/389 , G01R31/3842 , G01R31/367 , G01R31/392
摘要： The present disclosure relates to the field of battery state monitoring technologies, and in particular, to a battery state monitoring method and apparatus. The method is: monitoring a voltage value and a current value of an output end of a battery; determining a battery impedance value based on the voltage value; calculating an impedance voltage-drop value based on the current value and the battery impedance value; calculating an open circuit voltage of the battery based on the voltage value and the impedance voltage-drop value; when a difference of the open circuit voltage between two consecutive calculations is greater than or equal to a threshold, judging that the battery state is abnormal; and when the difference of the open circuit voltage between two consecutive calculations is determined to be lower than the threshold, updating the battery impedance value based on the voltage value and the current value. By using the foregoing method, the battery state is judged by verifying a relationship between a set threshold and a difference of the open circuit voltage between two consecutive calculations, thereby improving the accuracy of battery safety judgment. A possibility of a safety accident occurring in a battery can be predicted, thereby reducing or avoiding a risk of fire outbreak of a device caused due to a battery safety fault of the device.
-
-
-
-
-
-
-
-
-
搜索结果
28 条记录 (耗时 0.04 秒)
