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1.发明公开公开(公告)号：US20230417834A1
公开(公告)日：2023-12-28
申请号：US18208372
申请日：2023-06-12
发明人： Pingchao Hao , Zhiyi Zhang , Yanan Guo , Xiao Yan , Enhai Zhao , Zhou Yang , Zhimin Zhou , Xiaohua Chen
IPC分类号： G01R31/367 , G01R31/388
CPC分类号： G01R31/367 , G01R31/388
摘要： The invention discloses a method, a system and a storage medium for solid-phase concentration correction of a lithium battery. The method includes establishing an electrochemical model of the lithium battery; initializing a solid phase concentration in the electrochemical model to be a first solid phase concentration; simulating the simulated output voltage of the lithium battery in a preset period according to the electrochemical model, the preset current and the first solid-phase concentration; acquiring the actual output voltage of the lithium battery in the preset period; calculating an error coefficient between the simulation output voltage and the actual output voltage, and presetting an error threshold corresponding to the error coefficient; and when the error coefficient is greater than the error threshold, performing iterative correction on the first solid phase concentration until the error coefficient is not greater than the error threshold, and outputting the corrected second solid phase concentration.
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公开(公告)号：US20230408584A1
公开(公告)日：2023-12-21
申请号：US18206669
申请日：2023-06-07
发明人： Danfei Gu , Mingchen Jiang , Siyuan Chen , Xiao Yan , Enhai Zhao , Peng Ding , Pei Song , Weikun Wu , Xiaohua Chen
IPC分类号： G01R31/367 , G01R31/378
CPC分类号： G01R31/367 , G01R31/378
摘要： The invention provides an electrochemical model based method for early warning for a lithium battery, including establishing a three-dimensional electrochemical model for the lithium battery, and dividing the lithium battery into three portions respectively including a positive electrode, a negative electrode and a separator; performing spatial discretization on the three-dimensional electrochemical model according to a preset accuracy to establish the four-dimensional spatial coordinates of the lithium battery; obtaining a current lithium ion concentration in each position of the lithium battery by simulation based on the four-dimensional space coordinates, a historical lithium ion concentration and a historical diffusion coefficient of the lithium battery; and performing early warning for the lithium battery according to the current lithium ion concentration in each position. The method adopts the volumetric SOC or surface SOC of the lithium battery for operation management, which is direct and objective, and can be is applied to most external environments.
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公开(公告)号：US20230384384A1
公开(公告)日：2023-11-30
申请号：US18198332
申请日：2023-05-17
发明人： Pingchao Hao , Weikun Wu , Xiaohua Chen , Danfei Gu , Xiao Yan , Enhai Zhao , Pei Song , Peng Ding
IPC分类号： G01R31/3835 , H01M10/44 , H02J7/00 , G01R31/367
CPC分类号： G01R31/3835 , H01M10/44 , H02J7/0047 , G01R31/367
摘要： The invention discloses a method and a device for detecting the lithium intercalation amounts of lithium ion battery electrodes and a battery management system therewith. The method comprises acquiring lithium intercalation ranges of electrodes; obtaining a first characteristic point and a second characteristic point on the characteristic curves of electrode potentials; obtaining a small current rate charging and discharging curve; calculating the charging capacity-open circuit voltage curve; obtaining the third characteristic point and the fourth characteristic point on the charging capacity-open circuit voltage curve; and calculating the amounts of the lithium intercalations of the positive and negative electrodes based on relationships of the characteristic points, the electrode lithium intercalations and the charging capacity The invention can realize nondestructive detection of the amounts of lithium intercalation in the positive and negative electrodes of the lithium-ion battery without disassembly of the lithium-ion battery.
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4.发明公开公开(公告)号：US20230236265A1
公开(公告)日：2023-07-27
申请号：US18101237
申请日：2023-01-25
发明人： Weikun Wu , Peng Ding , Danfei Gu , Pingchao Hao , Pei Song , Xiao Yan , Enhai Zhao , Xiaohua Chen , Guopeng Zhou , Mingchen Jiang , Longfei Ye
IPC分类号： G01R31/396 , G01R31/367 , G01R31/392 , G01R31/388
CPC分类号： G01R31/396 , G01R31/367 , G01R31/392 , G01R31/388
摘要： The invention provides a method, a system and a terminal device for analyzing states of battery packs in a battery cluster. The method includes acquiring cell voltages of each battery pack in the battery cluster within a preset time; performing data cleaning on the acquired cell voltages; calculating a voltage standard score of each cell based on the cell voltages after data cleaning; calculating a mean value and a standard deviation of said voltage standard score; for each battery pack, plotting scattered points based on the mean value and the standard deviation, and performing closed curve fitting to the scattered points to obtain a closed curve; and analyzing the state of the battery pack based on the closed curve.
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5.发明公开公开(公告)号：US20230280404A1
公开(公告)日：2023-09-07
申请号：US18115130
申请日：2023-02-28
发明人： Pingchao Hao , Danfei Gu , Xiao Yan , Enhai Zhao , Pei Song , Peng Ding , Weikun Wu , Xiaohua Chen
IPC分类号： G01R31/367 , G01R31/3842
CPC分类号： G01R31/367 , G01R31/3842 , H02J7/0048
摘要： The invention provides method and device for battery state-of-charge (SOC) estimation. The method comprises establishing an electrochemical model for a battery; setting an initial value of the current SOC of the battery, and determining an initial distribution of solid-phase lithium ion concentrations in the electrochemical model according to the initial value of the SOC; performing a charge/discharge test on the battery, collecting measured voltage and current of the battery after a first time interval; calculating an output voltage and a distribution of the solid-phase lithium ion concentrations at a current acquisition time based on the measured current and the initial distribution of the solid-phase lithium ion concentrations; and when a voltage difference between the output voltage and the measured voltage is within a preset range, estimating the current SOC value of the battery based on the distribution of the solid-phase lithium ion concentration at the current acquisition time.
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6.发明公开公开(公告)号：US20240069116A1
公开(公告)日：2024-02-29
申请号：US18237483
申请日：2023-08-24
发明人： Peng Ding , Yanwen Zhang , Weikun Wu , Haowen Ren , Zonglin Cai , Xiaohua Chen , Xiao Yan , Enhai Zhao , Pei Song , Danfei Gu , Pingchao Hao
IPC分类号： G01R31/389 , G01R31/371 , H02J7/00
CPC分类号： G01R31/389 , G01R31/371 , H02J7/0047
摘要： The invention discloses a method, a system, an electronic device, and a storage medium for determining performance of a power battery. The method includes the following steps: acquiring historical data of the power battery in at least two charging processes; determining, according to historical data in one charging process, a dQ/dV curve and a direct current internal resistance corresponding to said charging process; calculating a relative change rate of internal resistance capacity in any two charging processes; and determining the performance of the power battery according to the relative change rate of internal resistance capacity and a relative change rate of internal resistance capacity range corresponding to fault type. The invention can effectively determine whether the performance of the power battery is abnormal by combining, in the two charging processes, the target peak value of a dQ/dV curve of the power battery and the change in direct current internal resistance.
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公开(公告)号：US20240027529A1
公开(公告)日：2024-01-25
申请号：US18222552
申请日：2023-07-17
发明人： Danfei Gu , Siyuan Chen , Mingchen Jiang , Xiao Yan , Enhai Zhao , Xiaohua Chen
IPC分类号： G01R31/367 , G01R31/3835
CPC分类号： G01R31/367 , G01R31/3835
摘要： The invention discloses method system for detecting lithium precipitation of lithium batteries. The method includes acquiring voltage-time data of lithium batteries of a battery module; performing feature extraction on the voltage-time data to obtain voltage-time data of charging and discharging in accordance with a preset range; performing an inflection point judgment on the voltage-time data of the charging and discharging; determining that there exists the inflection point, and grading the inflection point time when the inflection point occurs; and detecting an amount of lithium precipitation of the lithium batteries based on the grade of the inflection point time. The method combines data feature extraction and electrochemical model in big data and establishes a series of log and threshold system to detect and monitor lithium precipitation and early warn for lithium batteries.
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8.发明公开公开(公告)号：US20230361593A1
公开(公告)日：2023-11-09
申请号：US18139406
申请日：2023-04-26
发明人： Pei Song , Zhiyi Zhang , Yanan Guo , Danfei Gu , Pingchao Hao , Peng Ding , Weikun Wu , Guopeng Zhou , Wenfu Wang , Xiao Yan , Enhai Zhao , Xiaohua Chen
IPC分类号： H02J7/00
CPC分类号： H02J7/007182 , H02J7/00302 , H02J7/00306 , H02J7/0048
摘要： The invention provides method, apparatus and storage medium for adjusting the charging-discharging efficiency ratio of an energy storage power station. The method comprises before charging, determining theoretical charging electric quantity, theoretical charging average power, initial charging voltage and initial charging current; in the charging process, adjusting the current charging current by using a preset step length; responding to meeting the charging cutoff condition, ending the charging process, and recording the charging power, charging average power and actual charging time during the charging process; before discharging, determining theoretical discharging electric quantity, theoretical discharge average power and initial discharge current; in the discharging process, adjusting the current discharging current by using a preset step length; and responding to meeting the discharge cutoff condition, ending the discharge process, and recording the discharging electric quantity, the discharge average power and the actual discharge time duration during the discharge process.
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9.发明公开公开(公告)号：US20230236252A1
公开(公告)日：2023-07-27
申请号：US18101218
申请日：2023-01-25
发明人： Peng Ding , Xiao Yan , Enhai Zhao , Danfei Gu , Pingchao Hao , Pei Song , Weikun Wu , Xiaohua Chen , Guopeng Zhou , Mingchen Jiang
IPC分类号： G01R31/374 , G01R31/3828 , H02J7/00
CPC分类号： G01R31/374 , G01R31/3828 , H02J7/00718 , H02J7/007182
摘要： The invention provides methods, devices and non-transitory tangible computer-readable storage media for estimating a state of charge of a battery and extracting a charging curve of the battery. The method for estimating the state of charge of the battery includes estimating a first state of charge of the battery; determining a charging curve that conforms to the present charging scenario, wherein the present charging scenario is characterized by at least one of parameters including an ambient temperature, a charging rate, an internal resistance, a state of health, a lifespan, and an open circuit voltage of the battery; and correcting the first state of charge according to the charging curve to obtain a final state of charge of the battery.
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10.发明公开公开(公告)号：US20240289413A1
公开(公告)日：2024-08-29
申请号：US18503206
申请日：2023-11-07
发明人： Xiaohua Chen , Zhimin Zhou , Qiong Wei , Xiao Yan , Enhai Zhao , Pingchao Hao , Zhou Yang
IPC分类号： G01R31/367 , G01R31/396
CPC分类号： G06F17/11 , G01R31/367 , G01R31/396 , G06F17/18
摘要： Provided are a method and an apparatus for identifying a parameter of a battery model, an electronic device, and a storage medium. The method includes: obtaining to-be-identified parameters from an electrochemical model to form individuals; calculating a first fitness for each individual; determining a cell parameter if any individual has a first fitness less than a fitness threshold; sorting the individuals in an ascending order based on magnitudes of the first fitness, and partition the individuals into two parts in a case that each individual has a first fitness greater than or equal to the fitness threshold; updating to sub-individuals obtained from partition; calculating a second fitness for each individual, compare the second fitness with the first fitness, and retain an individual having a smaller fitness; and terminates if a fitness of the retained individual is less than the fitness threshold.
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