CN117317417B - State evaluation method for battery energy storage system - Google Patents
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
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- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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Abstract
The invention discloses a state evaluation method of a battery energy storage system, which relates to the technical field of battery energy storage, and realizes intelligent judgment of maintenance requirements, optimization of maintenance adjustment and operation performance and determination of maintenance frequency by comprehensively evaluating electrolyte state and performance data, which is helpful for improving reliability and performance of the battery energy storage system, reducing maintenance cost and maintenance time, and can obtain electrolyte state evaluation coefficients of each battery in a battery pack and judge whether maintenance is needed according to analysis of electrolyte state data, so that blind maintenance can be avoided, maintenance cost and maintenance time are reduced, and simultaneously, electrolyte maintenance adjustment values are analyzed according to the state evaluation coefficients of the battery to be maintained, which is helpful for improving maintenance effects, prolonging service life of the battery, and judging maintenance requirements and maintenance period of the electrolyte by analyzing maintenance times and operation time of the electrolyte.
Description
Technical Field
The invention relates to the technical field of battery energy storage, in particular to a state evaluation method of a battery energy storage system.
Background
The battery energy storage system is a key energy storage device for balancing energy supply and demand, providing a standby power supply and adjusting the frequency of a power grid, electrolyte is an important component in battery energy storage, the state of the electrolyte has an important influence on the performance and the service life of a battery, and in order to ensure the reliability and the performance of the battery energy storage system, the state of the battery energy storage system is important to evaluate, so that a battery energy storage system state evaluation method is needed.
The state evaluation method of the battery energy storage system in the prior art often depends on experience and expertise, lacks scientific basis and guidance, so that the effect of maintenance adjustment is often uncertain, and the expected effect can not be achieved, and obviously, the evaluation method has at least the following problems: 1. in the prior art, monitoring and evaluation on the state of the electrolyte are lacking, abnormal conditions of the electrolyte cannot be found in time, which may lead to performance degradation of the battery pack and even cause faults, so that a poor maintenance effect may be caused, and if maintenance adjustment cannot be performed individually, an optimal maintenance effect may not be achieved, and the reliability and the service life of the whole battery energy storage system are affected.
2. Meanwhile, the lack of reasonable distribution of the operation optimization adjustment value after the maintenance of each battery to be maintained is completed in the prior art may result in low operation efficiency, the performance evaluation coefficient of each battery after the maintenance is completed is different, if the reasonable operation optimization adjustment is not performed, the advantages and the potential of each battery may not be fully utilized, some batteries may be overused, and other batteries may not obtain sufficient operation opportunities, which may result in the reduction of the energy utilization efficiency of the whole battery energy storage system.
Disclosure of Invention
In view of the above-mentioned technical shortcomings, the present invention aims to provide a battery energy storage system state evaluation method.
In order to solve the technical problems, the invention adopts the following technical scheme: the invention provides a battery energy storage system state evaluation method, which comprises the following steps: step one, acquiring state data: and acquiring state data corresponding to electrolyte of each battery in the storage battery pack, wherein the state data comprises solute concentration, conductivity and pH value.
Judging the state of electrolyte: according to the state data corresponding to the electrolyte of each battery in the storage battery pack, the state data corresponding to the electrolyte of each battery in the storage battery pack is analyzed, a state evaluation coefficient corresponding to the electrolyte of each battery in the storage battery pack is obtained, whether the electrolyte of each battery in the storage battery pack needs maintenance or not is judged, and the electrolyte of each battery in the storage battery pack which is judged to need maintenance is recorded as each battery to be maintained.
Step three, maintaining analysis of the adjustment value: and according to the state evaluation coefficients corresponding to the batteries to be maintained, further analyzing electrolyte maintenance adjustment values corresponding to the batteries to be maintained, and maintaining the batteries to be maintained according to the corresponding electrolyte maintenance adjustment values.
Step four, acquiring performance data: and when the maintenance of each battery to be maintained is completed, acquiring corresponding performance data of each battery to be maintained after the maintenance is completed, wherein the performance data comprises the internal resistance, the charging efficiency and the discharging efficiency of the battery.
Step five, analyzing performance data: and analyzing the corresponding performance data of each battery to be maintained after the maintenance is completed according to the corresponding performance data of each battery to be maintained after the maintenance is completed, and obtaining the corresponding performance evaluation coefficient of each battery to be maintained after the maintenance is completed.
Step six, analyzing operation optimization adjustment values: and according to the corresponding performance evaluation coefficient after the maintenance of each battery to be maintained is completed, further analyzing the corresponding operation optimization adjustment value after the maintenance of each battery to be maintained is completed, and optimizing each battery to be maintained according to the corresponding operation optimization adjustment value after the maintenance of each battery to be maintained is completed.
Step seven, analysis of maintenance frequency: the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are obtained, further the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are analyzed, the maintenance frequency corresponding to the electrolyte of each battery in the storage battery pack is obtained, and whether the electrolyte of each battery in the storage battery pack needs to be replaced or not is judged.
Preferably, the acquiring the state data corresponding to the electrolyte of each battery in the storage battery pack specifically includes the following steps: a1, an electrolyte solute concentration sensor, a conductivity sensor and a pH sensor are arranged in the electrolyte of each cell in the storage battery pack.
A2, acquiring the solute concentration corresponding to the electrolyte of each cell in the storage battery through an electrolyte solute concentration sensor arranged in the electrolyte of each cell in the storage battery.
A3, acquiring the conductivity corresponding to the electrolyte of each cell in the storage battery through a conductivity sensor arranged in the electrolyte of each cell in the storage battery.
And A4, acquiring the pH value corresponding to the electrolyte of each battery in the storage battery pack through a pH sensor arranged in the electrolyte of each battery in the storage battery pack.
Preferably, the analyzing the state data corresponding to the electrolyte of each cell in the storage battery pack specifically includes the following steps: the solute concentration, the conductivity and the pH value corresponding to the electrolyte of each battery in the storage battery are respectively recorded as、/>Andwherein->Indicating the corresponding number of each cell, +.>N is any integer greater than 2, and is substituted into a calculation formulaObtaining state evaluation coefficients corresponding to electrolyte of each battery in the storage battery pack>Wherein->、/>、/>Respectively isStandard solute concentration, standard conductivity and standard pH value corresponding to electrolyte of battery in set storage battery pack>、/>、/>Respectively set weighting factors corresponding to electrolyte solute concentration, conductivity and pH value of cells in the storage battery.
Preferably, the step of determining whether the electrolyte of each cell in the storage battery needs maintenance comprises the following specific steps: comparing the state evaluation coefficient corresponding to the electrolyte of each battery in the storage battery with the state evaluation coefficient corresponding to the electrolyte of the set standard battery, judging that the electrolyte of the battery in the storage battery does not need to be maintained if the state evaluation coefficient corresponding to the electrolyte of a certain battery in the storage battery is greater than or equal to the state evaluation coefficient corresponding to the electrolyte of the set standard battery, and judging that the electrolyte of the battery in the storage battery needs to be maintained if the state evaluation coefficient corresponding to the electrolyte of the certain battery in the storage battery is less than the state evaluation coefficient corresponding to the electrolyte of the set standard battery, so as to judge whether the electrolyte of each battery in the storage battery needs to be maintained or not.
Preferably, the analyzing the electrolyte maintenance adjustment value corresponding to each battery to be maintained includes the following specific analysis process: comparing the state evaluation coefficient corresponding to each battery to be maintained with the state evaluation coefficient corresponding to each electrolyte maintenance adjustment value in the database, and if the state evaluation coefficient corresponding to a certain battery to be maintained is the same as the state evaluation coefficient corresponding to a certain electrolyte maintenance adjustment value in the database, taking the electrolyte maintenance adjustment value corresponding to the state evaluation coefficient in the database as the electrolyte maintenance adjustment value corresponding to the battery to be maintained, so that the electrolyte maintenance adjustment value corresponding to each battery to be maintained is analyzed.
Preferably, the correspondence of each battery to be maintained after maintenance is completedThe data can be analyzed, and the specific analysis process is as follows: the internal resistance, charging efficiency and discharging efficiency of the corresponding battery after the maintenance of each battery to be maintained are respectively recorded as、And->Wherein->Indicating the corresponding number of each battery to be maintained, < >>M is any integer greater than 2, and is substituted into a calculation formula +.>Obtaining corresponding performance evaluation coefficients of each battery to be maintained after maintenance is completed>Wherein->、/>、/>Respectively corresponding to the internal resistance, the standard charging efficiency and the standard discharging efficiency of the set battery to be maintained after the maintenance is finished>、/>、/>Respectively is set up asAnd after the maintenance of the battery to be maintained is completed, the weight factors corresponding to the internal resistance, the charging efficiency and the discharging efficiency of the battery are represented by a natural constant.
Preferably, the analyzing the operation optimization adjustment value corresponding to each battery to be maintained after maintenance is completed includes the following steps: comparing the performance evaluation coefficient corresponding to each battery to be maintained after maintenance is completed with the performance evaluation coefficient corresponding to each operation optimization adjustment value in the database, and if the performance evaluation coefficient corresponding to each battery to be maintained after maintenance is completed is the same as the performance evaluation coefficient corresponding to a certain operation optimization adjustment value in the database, using the operation optimization adjustment value corresponding to the performance evaluation coefficient in the database as the operation optimization adjustment value corresponding to each battery to be maintained after maintenance is completed, and analyzing the operation optimization adjustment value corresponding to each battery to be maintained after maintenance is completed in this way.
Preferably, the maintenance frequency corresponding to the electrolyte of each cell in the storage battery pack is obtained by the following specific obtaining process: the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are respectively recorded asAnd->Wherein->Indicating the corresponding number of each cell, +.>N is any integer greater than 2, substituted into the calculation formula +.>Obtaining maintenance frequency corresponding to electrolyte of each battery in the storage battery pack>Wherein->Represented as a battery packA correction factor corresponding to the electrolyte maintenance frequency of the battery.
Preferably, the step of determining whether the electrolyte of each cell in the storage battery needs to be replaced comprises the following specific steps: comparing the maintenance frequency corresponding to the electrolyte of each battery in the storage battery with the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, if the maintenance frequency corresponding to the electrolyte of a certain battery in the storage battery is smaller than or equal to the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, judging that the electrolyte of the battery in the storage battery does not need to be replaced, and if the maintenance frequency corresponding to the electrolyte of the certain battery in the storage battery is larger than the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, judging that the electrolyte of the battery in the storage battery needs to be replaced, and judging whether the electrolyte of each battery in the storage battery needs to be replaced or not in this way.
The invention has the beneficial effects that: 1. according to the invention, through comprehensively evaluating the state and performance data of the electrolyte, the intelligent judgment of maintenance requirements, the optimization of maintenance adjustment and operation performance are realized, and the maintenance frequency can be determined, so that the reliability and performance of the battery energy storage system are improved, and the maintenance cost and maintenance time are reduced.
2. According to the invention, according to the analysis of the electrolyte state data, the electrolyte state evaluation coefficient of each battery in the battery pack can be obtained, and whether maintenance is needed or not is judged, so that blind maintenance can be avoided, the maintenance cost and the maintenance time are reduced, meanwhile, according to the state evaluation coefficient of the battery to be maintained, the electrolyte maintenance adjustment value is analyzed, and personalized maintenance adjustment can be carried out for different batteries, thereby being beneficial to improving the maintenance effect and prolonging the service life of the battery.
3. According to the invention, the maintenance frequency of the electrolyte can be obtained by analyzing the maintenance times and the operation time of the electrolyte, which is helpful for judging the maintenance requirement and the maintenance period of the electrolyte and timely carrying out replacement or other maintenance operations.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the steps of the method of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention is shown in fig. 1, and a method for evaluating the state of a battery energy storage system, which comprises the following steps: step one, acquiring state data: and acquiring state data corresponding to electrolyte of each battery in the storage battery pack, wherein the state data comprises solute concentration, conductivity and pH value.
In a specific embodiment, the acquiring the state data corresponding to the electrolyte of each cell in the storage battery pack specifically includes the following steps: a1, an electrolyte solute concentration sensor, a conductivity sensor and a pH sensor are arranged in the electrolyte of each cell in the storage battery pack.
A2, acquiring the solute concentration corresponding to the electrolyte of each cell in the storage battery through an electrolyte solute concentration sensor arranged in the electrolyte of each cell in the storage battery.
A3, acquiring the conductivity corresponding to the electrolyte of each cell in the storage battery through a conductivity sensor arranged in the electrolyte of each cell in the storage battery.
And A4, acquiring the pH value corresponding to the electrolyte of each battery in the storage battery pack through a pH sensor arranged in the electrolyte of each battery in the storage battery pack.
Judging the state of electrolyte: according to the state data corresponding to the electrolyte of each battery in the storage battery pack, the state data corresponding to the electrolyte of each battery in the storage battery pack is analyzed, a state evaluation coefficient corresponding to the electrolyte of each battery in the storage battery pack is obtained, whether the electrolyte of each battery in the storage battery pack needs maintenance or not is judged, and the electrolyte of each battery in the storage battery pack which is judged to need maintenance is recorded as each battery to be maintained.
In a specific embodiment, the analyzing the state data corresponding to the electrolyte of each cell in the storage battery pack specifically includes the following steps: the solute concentration, the conductivity and the pH value corresponding to the electrolyte of each battery in the storage battery are respectively recorded as、/>And->Wherein->Indicating the corresponding number of each cell, +.>N is any integer greater than 2, substituted into the calculation formula +.>Obtaining state evaluation coefficients corresponding to electrolyte of each battery in the storage battery pack>Wherein->、/>、/>Respectively isStandard solute concentration, standard conductivity and standard pH value corresponding to electrolyte of battery in set storage battery pack>、/>、/>Respectively set weighting factors corresponding to electrolyte solute concentration, conductivity and pH value of cells in the storage battery.
It should be noted that the number of the substrates,、/>、/>are all greater than 0 and less than 1.
In a specific embodiment, the determining whether the electrolyte of each cell in the storage battery needs maintenance includes the following specific determining process: comparing the state evaluation coefficient corresponding to the electrolyte of each battery in the storage battery with the state evaluation coefficient corresponding to the electrolyte of the set standard battery, judging that the electrolyte of the battery in the storage battery does not need to be maintained if the state evaluation coefficient corresponding to the electrolyte of a certain battery in the storage battery is greater than or equal to the state evaluation coefficient corresponding to the electrolyte of the set standard battery, and judging that the electrolyte of the battery in the storage battery needs to be maintained if the state evaluation coefficient corresponding to the electrolyte of the certain battery in the storage battery is less than the state evaluation coefficient corresponding to the electrolyte of the set standard battery, so as to judge whether the electrolyte of each battery in the storage battery needs to be maintained or not.
Step three, maintaining analysis of the adjustment value: and according to the state evaluation coefficients corresponding to the batteries to be maintained, further analyzing electrolyte maintenance adjustment values corresponding to the batteries to be maintained, and maintaining the batteries to be maintained according to the corresponding electrolyte maintenance adjustment values.
In a specific embodiment, the electrolyte maintenance adjustment value corresponding to each battery to be maintained is analyzed, and the specific analysis process is as follows: comparing the state evaluation coefficient corresponding to each battery to be maintained with the state evaluation coefficient corresponding to each electrolyte maintenance adjustment value in the database, and if the state evaluation coefficient corresponding to a certain battery to be maintained is the same as the state evaluation coefficient corresponding to a certain electrolyte maintenance adjustment value in the database, taking the electrolyte maintenance adjustment value corresponding to the state evaluation coefficient in the database as the electrolyte maintenance adjustment value corresponding to the battery to be maintained, so that the electrolyte maintenance adjustment value corresponding to each battery to be maintained is analyzed.
Step four, acquiring performance data: and when the maintenance of each battery to be maintained is completed, acquiring corresponding performance data of each battery to be maintained after the maintenance is completed, wherein the performance data comprises the internal resistance, the charging efficiency and the discharging efficiency of the battery.
Step five, analyzing performance data: and analyzing the corresponding performance data of each battery to be maintained after the maintenance is completed according to the corresponding performance data of each battery to be maintained after the maintenance is completed, and obtaining the corresponding performance evaluation coefficient of each battery to be maintained after the maintenance is completed.
In a specific embodiment, the analyzing the corresponding performance data after the maintenance of each battery to be maintained is completed includes the following specific analysis process: the internal resistance, charging efficiency and discharging efficiency of the corresponding battery after the maintenance of each battery to be maintained are respectively recorded as、/>And->Wherein->Indicating the corresponding number of each battery to be maintained, < >>M is any integer greater than 2, and is substituted into a calculation formula +.>Obtaining corresponding performance evaluation coefficients of each battery to be maintained after maintenance is completed>Wherein->、/>、/>Respectively corresponding to the internal resistance, the standard charging efficiency and the standard discharging efficiency of the set battery to be maintained after the maintenance is finished>、/>、/>And respectively setting weight factors corresponding to the internal resistance, the charging efficiency and the discharging efficiency of the battery after the maintenance of the battery to be maintained is completed, wherein e represents a natural constant.
It should be noted that the number of the substrates,、/>、/>are all greater than 0 and less than 1.
Step six, analyzing operation optimization adjustment values: and according to the corresponding performance evaluation coefficient after the maintenance of each battery to be maintained is completed, further analyzing the corresponding operation optimization adjustment value after the maintenance of each battery to be maintained is completed, and optimizing each battery to be maintained according to the corresponding operation optimization adjustment value after the maintenance of each battery to be maintained is completed.
In a specific embodiment, the analyzing the operation optimization adjustment value corresponding to each battery to be maintained after maintenance is completed includes the following steps: comparing the performance evaluation coefficient corresponding to each battery to be maintained after maintenance is completed with the performance evaluation coefficient corresponding to each operation optimization adjustment value in the database, and if the performance evaluation coefficient corresponding to each battery to be maintained after maintenance is completed is the same as the performance evaluation coefficient corresponding to a certain operation optimization adjustment value in the database, using the operation optimization adjustment value corresponding to the performance evaluation coefficient in the database as the operation optimization adjustment value corresponding to each battery to be maintained after maintenance is completed, and analyzing the operation optimization adjustment value corresponding to each battery to be maintained after maintenance is completed in this way.
According to the invention, according to the analysis of the electrolyte state data, the electrolyte state evaluation coefficient of each battery in the battery pack can be obtained, and whether maintenance is needed or not is judged, so that blind maintenance can be avoided, the maintenance cost and the maintenance time are reduced, meanwhile, according to the state evaluation coefficient of the battery to be maintained, the electrolyte maintenance adjustment value is analyzed, and personalized maintenance adjustment can be carried out for different batteries, thereby being beneficial to improving the maintenance effect and prolonging the service life of the battery.
Step seven, analysis of maintenance frequency: the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are obtained, further the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are analyzed, the maintenance frequency corresponding to the electrolyte of each battery in the storage battery pack is obtained, and whether the electrolyte of each battery in the storage battery pack needs to be replaced or not is judged.
It should be noted that the step of replacing the electrolyte includes stopping the operation of the battery pack and ensuring safe operation, discharging the electrolyte from the battery according to the direction of the battery manufacturer, cleaning the inside of the battery, ensuring no residual electrolyte, and adding a new electrolyte to the battery according to the direction of the battery manufacturer.
In a specific embodiment, whatThe maintenance frequency corresponding to the electrolyte of each battery in the storage battery pack is obtained, and the specific obtaining process is as follows: the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are respectively recorded asAnd->Wherein->Indicating the corresponding number of each cell, +.>N is any integer greater than 2, and is substituted into a calculation formulaObtaining maintenance frequency corresponding to electrolyte of each battery in the storage battery pack>Wherein->Expressed as a correction factor corresponding to the electrolyte maintenance frequency of the cells in the battery.
It should be noted that the number of the substrates,greater than 0 and less than 1.
In another specific embodiment, the determining whether the electrolyte of each cell in the storage battery needs to be replaced includes the following specific determining process: comparing the maintenance frequency corresponding to the electrolyte of each battery in the storage battery with the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, if the maintenance frequency corresponding to the electrolyte of a certain battery in the storage battery is smaller than or equal to the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, judging that the electrolyte of the battery in the storage battery does not need to be replaced, and if the maintenance frequency corresponding to the electrolyte of the certain battery in the storage battery is larger than the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, judging that the electrolyte of the battery in the storage battery needs to be replaced, and judging whether the electrolyte of each battery in the storage battery needs to be replaced or not in this way.
According to the invention, the maintenance frequency of the electrolyte can be obtained by analyzing the maintenance times and the operation time of the electrolyte, which is helpful for judging the maintenance requirement and the maintenance period of the electrolyte and timely carrying out replacement or other maintenance operations.
According to the invention, through comprehensively evaluating the state and performance data of the electrolyte, the intelligent judgment of maintenance requirements, the optimization of maintenance adjustment and operation performance are realized, and the maintenance frequency can be determined, so that the reliability and performance of the battery energy storage system are improved, and the maintenance cost and maintenance time are reduced.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar arrangements may be substituted by those skilled in the art, without departing from the principles of the invention or beyond the scope of the invention as defined in the description.
Claims (5)
1. A method for evaluating the state of a battery energy storage system, comprising:
step one, acquiring state data: acquiring state data corresponding to electrolyte of each battery in the storage battery pack, wherein the state data comprises solute concentration, conductivity and pH value;
judging the state of electrolyte: according to the state data corresponding to the electrolyte of each battery in the storage battery pack, analyzing the state data corresponding to the electrolyte of each battery in the storage battery pack to obtain a state evaluation coefficient corresponding to the electrolyte of each battery in the storage battery pack, judging whether the electrolyte of each battery in the storage battery pack needs maintenance or not, and marking the electrolyte of each battery in the storage battery pack which is judged to need maintenance as each battery to be maintained;
the state data corresponding to the electrolyte of each battery in the storage battery pack is analyzed, and the specific analysis process is as follows:
the solute concentration, the conductivity and the pH value corresponding to the electrolyte of each battery in the storage battery are respectively recorded as、/>And->Wherein->Indicating the corresponding number of each cell, +.>N is any integer greater than 2, and is substituted into a calculation formulaObtaining state evaluation coefficients corresponding to electrolyte of each battery in the storage battery pack>Wherein->、/>、/>Respectively corresponding to the standard solute concentration, standard conductivity and standard pH value of the electrolyte of the cells in the set storage battery pack,>、/>、/>respectively setting weight factors corresponding to electrolyte solute concentration, conductivity and pH value of cells in the storage battery pack;
step three, maintaining analysis of the adjustment value: according to the state evaluation coefficients corresponding to the batteries to be maintained, further analyzing electrolyte maintenance adjustment values corresponding to the batteries to be maintained, and maintaining the batteries to be maintained according to the corresponding electrolyte maintenance adjustment values;
the electrolyte maintenance adjustment values corresponding to the batteries to be maintained are analyzed, and the specific analysis process is as follows:
comparing the state evaluation coefficient corresponding to each battery to be maintained with the state evaluation coefficient corresponding to each electrolyte maintenance adjustment value in the database, and if the state evaluation coefficient corresponding to a certain battery to be maintained is the same as the state evaluation coefficient corresponding to a certain electrolyte maintenance adjustment value in the database, using the electrolyte maintenance adjustment value corresponding to the state evaluation coefficient in the database as the electrolyte maintenance adjustment value corresponding to the battery to be maintained, so as to analyze the electrolyte maintenance adjustment value corresponding to each battery to be maintained;
step four, acquiring performance data: when the maintenance of each battery to be maintained is completed, acquiring corresponding performance data of each battery to be maintained after the maintenance is completed, wherein the performance data comprises the internal resistance, the charging efficiency and the discharging efficiency of the battery;
step five, analyzing performance data: according to the corresponding performance data of each battery to be maintained after maintenance is completed, analyzing the corresponding performance data of each battery to be maintained after maintenance is completed, and obtaining the corresponding performance evaluation coefficient of each battery to be maintained after maintenance is completed;
the corresponding performance data of each battery to be maintained after maintenance is completed is analyzed, and the specific analysis process is as follows:
the internal resistance, charging efficiency and discharging efficiency of the corresponding battery after the maintenance of each battery to be maintained are respectively recorded as、/>Andwherein->Indicating the corresponding number of each battery to be maintained, < >>M is any integer greater than 2, and is substituted into a calculation formulaObtaining corresponding performance evaluation coefficients of each battery to be maintained after maintenance is completed>Wherein->、/>、/>Respectively corresponding to the internal resistance, the standard charging efficiency and the standard discharging efficiency of the set battery to be maintained after the maintenance is finished>、/>、/>Respectively setting weight factors corresponding to the internal resistance, the charging efficiency and the discharging efficiency of the battery after the maintenance of the battery to be maintained is completedE represents a natural constant;
step six, analyzing operation optimization adjustment values: according to the corresponding performance evaluation coefficient after the maintenance of each battery to be maintained is completed, further analyzing the corresponding operation optimization adjustment value after the maintenance of each battery to be maintained is completed, and optimizing each battery to be maintained according to the corresponding operation optimization adjustment value after the maintenance of each battery to be maintained is completed;
the operation optimization adjustment values corresponding to the batteries to be maintained after maintenance is completed are analyzed, and the specific analysis process is as follows:
comparing the corresponding performance evaluation coefficient after the maintenance of each battery to be maintained with the performance evaluation coefficient corresponding to each operation optimization adjustment value in the database, and if the corresponding performance evaluation coefficient after the maintenance of a certain battery to be maintained is the same as the performance evaluation coefficient corresponding to a certain operation optimization adjustment value in the database, using the operation optimization adjustment value corresponding to the performance evaluation coefficient in the database as the operation optimization adjustment value corresponding to the battery to be maintained after the maintenance of the battery to be maintained is completed, so as to analyze the operation optimization adjustment value corresponding to the battery to be maintained after the maintenance of the battery to be maintained is completed;
step seven, analysis of maintenance frequency: the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are obtained, further the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are analyzed, the maintenance frequency corresponding to the electrolyte of each battery in the storage battery pack is obtained, and whether the electrolyte of each battery in the storage battery pack needs to be replaced or not is judged.
2. The method for evaluating the state of a battery energy storage system according to claim 1, wherein the step of acquiring the state data corresponding to the electrolyte of each battery in the battery pack comprises the following steps:
a1, installing an electrolyte solute concentration sensor, a conductivity sensor and a pH sensor in electrolyte of each battery in a storage battery pack;
a2, acquiring the solute concentration corresponding to the electrolyte of each battery in the storage battery through an electrolyte solute concentration sensor arranged in the electrolyte of each battery in the storage battery;
a3, acquiring the conductivity corresponding to the electrolyte of each battery in the storage battery through a conductivity sensor arranged in the electrolyte of each battery in the storage battery;
and A4, acquiring the pH value corresponding to the electrolyte of each battery in the storage battery pack through a pH sensor arranged in the electrolyte of each battery in the storage battery pack.
3. The method for evaluating the state of a battery energy storage system according to claim 1, wherein the step of determining whether the electrolyte of each battery in the battery pack requires maintenance comprises the following steps:
comparing the state evaluation coefficient corresponding to the electrolyte of each battery in the storage battery with the state evaluation coefficient corresponding to the electrolyte of the set standard battery, judging that the electrolyte of the battery in the storage battery does not need to be maintained if the state evaluation coefficient corresponding to the electrolyte of a certain battery in the storage battery is greater than or equal to the state evaluation coefficient corresponding to the electrolyte of the set standard battery, and judging that the electrolyte of the battery in the storage battery needs to be maintained if the state evaluation coefficient corresponding to the electrolyte of the certain battery in the storage battery is less than the state evaluation coefficient corresponding to the electrolyte of the set standard battery, so as to judge whether the electrolyte of each battery in the storage battery needs to be maintained or not.
4. The method for evaluating the state of a battery energy storage system according to claim 1, wherein the maintenance frequency corresponding to the electrolyte of each battery in the battery pack is obtained by the following steps:
the maintenance times and the operation time corresponding to the electrolyte of each battery in the storage battery pack are respectively recorded asAnd->Wherein->Number indicating the correspondence of each cell->N is any integer greater than 2, substituted into the calculation formula +.>Obtaining maintenance frequency corresponding to electrolyte of each battery in the storage battery pack>Wherein->Expressed as a correction factor corresponding to the electrolyte maintenance frequency of the cells in the battery.
5. The method for evaluating the state of a battery energy storage system according to claim 4, wherein the step of determining whether the electrolyte of each battery in the battery pack needs to be replaced comprises the following steps:
comparing the maintenance frequency corresponding to the electrolyte of each battery in the storage battery with the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, if the maintenance frequency corresponding to the electrolyte of a certain battery in the storage battery is smaller than or equal to the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, judging that the electrolyte of the battery in the storage battery does not need to be replaced, and if the maintenance frequency corresponding to the electrolyte of the certain battery in the storage battery is larger than the maintenance frequency corresponding to the electrolyte of the battery in the set standard storage battery, judging that the electrolyte of the battery in the storage battery needs to be replaced, and judging whether the electrolyte of each battery in the storage battery needs to be replaced or not in this way.
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| JP2015131573A (en) * | 2014-01-14 | 2015-07-23 | トヨタ自動車株式会社 | Hybrid electric vehicle |
| CN106486709A (en) * | 2015-08-25 | 2017-03-08 | 上海沪歌智能科技有限公司 | A kind of battery automatic management method and system |
| JP2021082400A (en) * | 2019-11-14 | 2021-05-27 | トヨタ自動車株式会社 | Estimation system |
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