CN111208428A - Real-time calculation method and system for cycle number of energy storage battery and storage medium - Google Patents

Real-time calculation method and system for cycle number of energy storage battery and storage medium Download PDF

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Publication number
CN111208428A
CN111208428A CN201911385756.1A CN201911385756A CN111208428A CN 111208428 A CN111208428 A CN 111208428A CN 201911385756 A CN201911385756 A CN 201911385756A CN 111208428 A CN111208428 A CN 111208428A
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cycle number
conversion coefficient
calculating
parameter
real
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CN111208428B (en
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李帅
常晓勇
陈福锋
赵谦
王玉婷
徐程骥
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Nanjing SAC Automation Co Ltd
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Nanjing SAC Automation Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm

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Abstract

The invention discloses a method and a system for calculating the cycle number of an energy storage battery in real time and a storage medium.

Description

Real-time calculation method and system for cycle number of energy storage battery and storage medium
Technical Field
The invention relates to a real-time calculation method for cycle number of an energy storage battery, and belongs to the technical field of new energy and electric power energy storage.
Background
The cycle number is an important characteristic quantity of the energy storage battery and is closely related to service life evaluation, state of charge (SOC) calculation, state of health (SOH) analysis and the like of the battery. At present, methods such as charging and discharging times statistics, available capacity testing and the like are mainly available. The former calculates the cycle times by counting the charging and discharging times of the battery, is limited to a complete charging and discharging process, and cannot be generally applied; the latter estimates the cycle times by detecting the available capacity and combining with the test parameters provided by the battery manufacturer, is only suitable for the battery overhaul occasions, and cannot monitor in real time. Therefore, the method for calculating the cycle number of the battery in real time and universally is significant.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a real-time calculation method for the cycle number of an energy storage battery, so as to solve the problem that the real-time monitoring cannot be realized in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a real-time calculation method for cycle number of an energy storage battery comprises the following steps:
acquiring load current and a conversion coefficient;
calculating an accumulated parameter according to the load current and a conversion coefficient;
and calculating according to the accumulated parameters to obtain the cycle times.
Further, the conversion coefficient comprises a current conversion coefficient, a temperature conversion coefficient and a cycle number conversion coefficient.
Further, the calculation method of the accumulative parameters comprises
Pk＝Pk-1+|Ik|·a·b·c/f (1)
Wherein, PkIs an accumulated parameter at time k, Pk-1Is an accumulated parameter at time k-1, IkThe load current at the time k, f is the sampling frequency, a is the current conversion coefficient, b is the temperature conversion coefficient, and c is the cycle number conversion coefficient at the time k-1.
Further, the method for calculating the number of cycles includes:
if PkNot less than m.Q, then NkD + m, otherwise Nk＝D+Pk/(2·Q)；
Wherein N iskThe cycle number is m, the anti-saturation parameter is m, the rated capacity is Q, and the temporary storage parameter is D.
Further, the update method of the temporary storage parameter is as follows:
D＝Nk。
further, the conversion coefficient is obtained by looking up a table.
A system for real-time counting of energy storage battery cycle times, the system comprising:
an acquisition module: the load current and the conversion coefficient are obtained;
a first calculation module: the load current and the conversion coefficient are used for calculating an accumulated parameter;
a second calculation module: and calculating the cycle number according to the accumulated parameters.
A system for real-time calculation of cycle number of an energy storage battery, the system comprising a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method described above.
Computer-readable storage medium, on which a computer program is stored, characterized in that the program realizes the steps of the above-described method when executed by a processor.
Compared with the prior art, the invention has the following beneficial effects:
the invention obtains the battery cycle times in real time by analyzing and calculating the data such as the battery load current and the like, and has the characteristics of universality, high efficiency and easy operation.
Drawings
Fig. 1 is an algorithm flow of a battery cycle number real-time calculation method according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in FIG. 1, the method for rapidly calculating the open-circuit voltage of a battery of the present invention comprises the following steps, wherein step 1 is the initialization of parameters, and steps 2 to 5 are the accumulation of a parameter PkThe calculation process of (1) comprises the steps 6 to 9 of PkAnti-saturation treatment and cycle number NkStep 10 is the algorithm ends or loops again.
Step 1, setting an anti-saturation parameter m, a temporary storage parameter D, a sampling frequency f and a rated capacity Q, and loading lookup table data of a conversion coefficient a and current, lookup table data of a conversion coefficient b and temperature, and lookup table data of a conversion coefficient c and cycle times;
step 2, obtaining load current IkTemperature TkWherein the subscript k represents the current time;
step 3, obtaining conversion coefficients a and b according to the lookup table data;
step 4, according to the cycle number N of the previous momentk-1Looking up a table to obtain a conversion coefficient c, wherein a subscript k-1 represents the previous moment;
step 5, calculating the accumulative parameter P according to the formula 1kWhere "|" denotes an absolute value operation, Pk-1The accumulated parameter at the last moment;
Pk＝Pk-1+|Ik|·a·b·c/f (1)
step 6, judging PkIf the formula 2 is satisfied, entering a step 7, otherwise, entering a step 9;
Pk≥m·Q (2)
step 7, calculating the cycle number N according to the formula 3kTurning to step 8;
Nk＝D+m (3)
step 8, updating the temporary storage parameter D and the accumulative parameter P according to the formulas 4 and 5kTurning to step 10;
D＝Nk(4)
Pk＝0 (5)
step 9, calculating the cycle number N according to the formula 6kTurning to step 10;
Nk＝D+Pk/(2·Q) (6)
and step 10, making k equal to k +1, repeating the step 2 to start the next calculation, or quitting the calculation.
A system for real-time counting of energy storage battery cycle times, the system comprising:
an acquisition module: the load current and the conversion coefficient are obtained;
a first calculation module: the load current and the conversion coefficient are used for calculating an accumulated parameter;
a second calculation module: and calculating the cycle number according to the accumulated parameters.
A system for real-time calculation of cycle number of an energy storage battery, the system comprising a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method described above.
Computer-readable storage medium, on which a computer program is stored, characterized in that the program realizes the steps of the above-described method when executed by a processor.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (9)

1. A real-time calculation method for the cycle number of an energy storage battery is characterized by comprising the following steps:
acquiring load current and a conversion coefficient;
calculating an accumulated parameter according to the load current and a conversion coefficient;
and calculating according to the accumulated parameters to obtain the cycle times.
2. The method according to claim 1, wherein the conversion coefficient comprises a current conversion coefficient, a temperature conversion coefficient and a cycle number conversion coefficient.
3. The method of claim 2, wherein the method of calculating the cumulative parameter comprises
Pk＝Pk-1+|Ik|·a·b·c/f (1)
Wherein, PkIs an accumulated parameter at time k, Pk-1Is an accumulated parameter at time k-1, IkThe load current at the time k, f, a, b, and c are sampling frequencies, a, and a temperature, respectively.
4. The method for calculating the cycle number of the energy storage battery in real time according to claim 3, wherein the method for calculating the cycle number comprises the following steps:
if PkNot less than m.Q, then NkD + m, otherwise Nk＝D+Pk/(2·Q)；
Wherein N iskThe cycle number is m, the anti-saturation parameter is m, the rated capacity is Q, and the temporary storage parameter is D.
5. The method according to claim 4, wherein the temporary storage parameter is updated as follows:
D＝Nk。
6. the method of claim 1, wherein the conversion factor is obtained by looking up a table.
7. A system for real-time counting of energy storage battery cycle times, the system comprising:
an acquisition module: the load current and the conversion coefficient are obtained;
a first calculation module: the load current and the conversion coefficient are used for calculating an accumulated parameter;
a second calculation module: and calculating the cycle number according to the accumulated parameters.
8. A system for real-time calculation of cycle number of an energy storage battery, the system comprising a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of claims 1 to 6.
9. Computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
CN201911385756.1A 2019-12-27 2019-12-27 Real-time calculation method and system for cycle number of energy storage battery and storage medium Active CN111208428B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
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CN113343407A (en) * 2021-03-31 2021-09-03 南京国电南自电网自动化有限公司 Equivalent optimization method and system for large-scale energy storage battery
CN113422407A (en) * 2021-06-09 2021-09-21 北京海博思创科技股份有限公司 Method and device for determining battery usable time and storage medium

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US8332342B1 (en) * 2009-11-19 2012-12-11 The United States of America as represented by the Administrator of the National Aeronautics & Space Administration (NASA) Model-based prognostics for batteries which estimates useful life and uses a probability density function
CN107240726A (en) * 2017-06-16 2017-10-10 长沙新材料产业研究院有限公司 A kind of method for predicting ferric phosphate lithium cell life cycle
CN108872862A (en) * 2018-04-28 2018-11-23 青岛特锐德电气股份有限公司 A kind of power battery cycle life evaluation method and charge and discharge stake
CN109870655A (en) * 2019-03-26 2019-06-11 上海工程技术大学 A kind of evaluation method for lithium battery SOC

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CN1503000A (en) * 2002-11-08 2004-06-09 MTEQϵͳ��ʽ���� Method for caculating circulation type of intelligent battery, method and equipment for correcting full recharge capacity to intelligent battery using said method
WO2011004550A1 (en) * 2009-07-10 2011-01-13 パナソニック株式会社 Circuit for counting number of cycles, battery pack, and battery system
US8332342B1 (en) * 2009-11-19 2012-12-11 The United States of America as represented by the Administrator of the National Aeronautics & Space Administration (NASA) Model-based prognostics for batteries which estimates useful life and uses a probability density function
CN107240726A (en) * 2017-06-16 2017-10-10 长沙新材料产业研究院有限公司 A kind of method for predicting ferric phosphate lithium cell life cycle
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113343407A (en) * 2021-03-31 2021-09-03 南京国电南自电网自动化有限公司 Equivalent optimization method and system for large-scale energy storage battery
CN113422407A (en) * 2021-06-09 2021-09-21 北京海博思创科技股份有限公司 Method and device for determining battery usable time and storage medium

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