MAP updating method and system of super capacitor energy storage system
Through the MAP diagram update method, the accuracy of SOC estimation in supercapacitor energy storage system is solved, efficient and low-cost SOC estimation and balance management are achieved, and the service life of supercapacitors is extended.
Patent Information
- Application Number
- CN202510358603.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-07-11
AI Technical Summary
The SOC estimation method of existing lithium-ion battery energy storage systems has cumulative errors and is difficult to apply in practice. The complex algorithm has high hardware requirements and cannot be effectively applied to supercapacitor energy storage systems.
The MAP graph update method is adopted to collect the internal resistance distribution of the same model supercapacitor, generate the MAP graph using experimental method and interpolation extrapolation method, and measure the internal resistance online for rounding and rounding, update the MAP graph, and combine the discharge current integral value and internal resistance change for SOC estimation.
It realizes accurate estimation of the SOC of the supercapacitor energy storage system, reduces hardware requirements and computing volume, improves estimation accuracy, and extends the service life of the supercapacitor.
Smart Images
Figure CN120294576A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of energy storage in power systems, and particularly relates to a MAP update method and system for a supercapacitor energy storage system. Background Art
[0002] At present, the SOC of a lithium-ion battery energy storage system is estimated by the current integration method. This algorithm is simple and occupies little memory, but it requires accurate knowledge of the integration starting point, so cumulative errors are likely to occur. Although the open-circuit voltage method can estimate the battery SOC more accurately, it can only be used when the circuit is open and is difficult to apply in practical applications. In recent years, there have also been exploratory studies using methods such as fuzzy inference, neural networks, and Kalman filtering. However, due to the complex algorithms and high hardware requirements, it is difficult to popularize in practical applications. Summary of the Invention
[0003] The present invention provides a MAP update method and system for a supercapacitor energy storage system, aiming to overcome the deficiencies of the above-mentioned prior art.
[0004] To achieve the above object, the present invention adopts the following technical solutions: A MAP update method for a supercapacitor energy storage system includes the following steps: 1) Collect supercapacitors of the same model that have been operating for different durations, so that the internal resistance of the supercapacitors is distributed in the interval, being the nominal internal resistance of the supercapacitor; 2) Determine the MAP diagrams of the collected supercapacitors with different internal resistances through the experimental method; 3) Through interpolation and extrapolation, in the interval, at intervals of 0.05 , obtain the MAP diagrams when the internal resistance of the supercapacitor is equal to , and save them in the supercapacitor management system, where n = 0, 1, 2... 20; 4) For the supercapacitor energy storage system, online measure the internal resistance of the supercapacitor ; 5) Let , indicating rounding the data to the nearest integer, and the supercapacitor management system correspondingly updates the MAP diagram to the MAP diagram with n = k.
[0005] A further improvement of the present invention is that in step 4), during the operation of the supercapacitor, the integral value of the supercapacitor discharge current with respect to time is , the rated stored energy of the supercapacitor is , both with the unit of Ah, and the equivalent cycle number of the supercapacitor is , every time the equivalent cycle count meets 100 times, an internal resistance measurement is performed.
[0006] A further improvement of the present invention lies in that in step 4), the method for measuring the internal resistance of the supercapacitor each time is: the supercapacitor is charged to the rated voltage and kept for 30 minutes, and then the supercapacitor is discharged with a current, where , C is the capacitance value of the supercapacitor, with the unit of F. When the supercapacitor changes from the holding mode to the constant-current discharge mode, the step change amount of the terminal voltage of the supercapacitor is , then the internal resistance of the supercapacitor .
[0007] A further improvement of the present invention lies in that in step 4), the internal resistances of the supercapacitor measured multiple times form an internal resistance sequence , the length of the sequence is n, and a typical value of n can be taken as 10. Moreover, every time a new measurement of the internal resistance of the supercapacitor is made, the sequence is shifted once, the earliest measured internal resistance data is removed, the latest measured internal resistance data is placed in the sequence, and then the average value of the new sequence data is calculated as the current internal resistance of the supercapacitor .
[0008] A further improvement of the present invention lies in that in step 1), is the nominal internal resistance of the supercapacitor, that is, the internal resistance of a newly produced supercapacitor by the supercapacitor manufacturer with an approximate zero operating time.
[0009] A MAP update system for a supercapacitor energy storage system includes the following steps: A supercapacitor collection unit, used to collect supercapacitors of the same model that have been operating for different durations, so that the internal resistances of the supercapacitors are distributed within the interval, is the nominal internal resistance of the supercapacitor; A first MAP diagram determination unit, used to determine the MAP diagram of the collected supercapacitors with different internal resistances through the experimental method; A second MAP diagram determination unit, used to obtain the MAP diagram when the internal resistance of the supercapacitor is equal to within the interval at intervals of 0.05 through interpolation and extrapolation, and store it in the supercapacitor management system, where n = 0, 1, 2... 20; ; An internal resistance on-line measurement unit, used to on-line measure the internal resistance of the supercapacitor for the supercapacitor energy storage system ; A MAP diagram update unit, used to make , It means rounding the data to an integer, and the supercapacitor management system correspondingly updates the MAP graph to the MAP graph with n = k.
[0010] A further improvement of the present invention lies in that in the internal resistance on-line measurement unit, during the operation of the supercapacitor, the integral value of the discharge current of the supercapacitor with respect to time is , and the rated storage energy of the supercapacitor is , both of which are in the unit of Ah. The equivalent cycle number of the supercapacitor is . Whenever the equivalent cycle number satisfies 100 times, a measurement of the internal resistance is performed.
[0011] A further improvement of the present invention lies in that in the internal resistance on-line measurement unit, the method for measuring the internal resistance of the supercapacitor each time is as follows: The supercapacitor is charged to the rated voltage and held for 30 minutes, and then discharged with current. Among them, , C is the capacitance value of the supercapacitor in the unit of F. When the supercapacitor changes from the holding mode to the constant current discharge mode, the step change amount of the terminal voltage of the supercapacitor is , then the internal resistance of the supercapacitor .
[0012] An electronic device includes: a processor and a memory coupled to the processor. The memory stores a computer program, and when the computer program is executed by the processor, the steps of the MAP update method of a supercapacitor energy storage system are implemented.
[0013] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the MAP update method of a supercapacitor energy storage system are implemented.
[0014] Compared with the prior art, the present invention has at least the following beneficial technical effects: The MAP update method and system of a supercapacitor energy storage system provided by the present invention use a MAP graph to update the SOC of the supercapacitor energy storage. The SOC estimation method based on the Map graph is also applicable to the supercapacitor energy storage system. When applying the Map graph to estimate the SOC of the supercapacitor energy storage system, it is found that in addition to the charge and discharge current and the terminal voltage, the internal resistance is also an influencing factor affecting the accuracy of the supercapacitor SOC estimation. Compared with the ampere-hour integration method and the open-circuit voltage method, its SOC estimation of the supercapacitor is more accurate. At the same time, compared with the Kalman filter method and the neural network method, it has lower requirements for the hardware circuit, less computation, and does not require training with a large amount of data, and can achieve better results in practical applications.
[0015] A MAP update method and system for a supercapacitor energy storage system provided by the present invention can more accurately estimate the SOC compared to traditional methods, taking into account the internal resistance change of the supercapacitor. Based on the accurate estimation of the SOC, better balanced charge and discharge management of the supercapacitor can be carried out, thereby extending the operating life of the supercapacitor energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0017] Figure 1 It is a structural block diagram of a MAP update system for a supercapacitor energy storage system of the present invention.
[0018] Figure 2 It is a MAP diagram of the supercapacitor energy storage system in an embodiment of the present invention.
[0019] Figure 3 It is an effect diagram in an embodiment of the present invention. SPECIFIC EMBODIMENTS
[0020] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.
[0021] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.
[0022] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.
[0023] It should be further understood that the term " / and / " used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0024] Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary, and in practice, there may be deviations due to manufacturing tolerances or technical limitations. Those skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual requirements.
[0025] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0026] Embodiment 1 A MAP update method for a supercapacitor energy storage system provided by the present invention includes the following steps: 1) Collect supercapacitors of the same model that have been operating for different durations, so that the internal resistance of the supercapacitors is distributed within the interval, where is the nominal internal resistance of the supercapacitor; 2) Determine the MAP diagrams of the collected supercapacitors with different internal resistances through the experimental method; 3) Through interpolation and extrapolation, within the interval, at intervals of 0.05 , obtain the MAP diagrams when the internal resistance of the supercapacitor is equal to , where n = 0, 1, 2... 20, and save them in the supercapacitor management system; 4) For the supercapacitor energy storage system, online measure the internal resistance of the supercapacitor; 5) Let , where represents rounding the data to an integer, and the supercapacitor management system correspondingly updates the MAP diagram to the MAP diagram with n = k.
[0027] In this embodiment, in step 4), during the operation of the supercapacitor, the integral value of the supercapacitor discharge current with respect to time is , the rated storage energy of the supercapacitor is , both in the unit of Ah, and the equivalent cycle number of the supercapacitor is . Whenever the equivalent cycle number meets 100 times, a measurement of the internal resistance is performed.
[0028] In this embodiment, in step 4), the method for measuring the internal resistance of the supercapacitor each time is: charge the supercapacitor to the rated voltage and keep it for 30 minutes, and then discharge the supercapacitor with a current, where , C is the capacitance value of the supercapacitor, in units of F. When the supercapacitor changes from the holding mode to the constant current discharge mode, the step change in the terminal voltage of the supercapacitor is , then the internal resistance of the supercapacitor .
[0029] In this embodiment, in step 4), the internal resistances of the supercapacitor measured multiple times form an internal resistance sequence , the length of the sequence is n, and a typical value of n can be 10. Moreover, each time a new measurement of the internal resistance of the supercapacitor is made, the sequence is shifted once, removing the earliest measured internal resistance data and placing the latest measured internal resistance data in the sequence. Then, the average value of the new sequence data is calculated as the current internal resistance of the supercapacitor .
[0030] In this embodiment, in step 1), is the nominal internal resistance of the supercapacitor, that is, the internal resistance of a newly produced supercapacitor by the manufacturer with an approximate zero operating time.
[0031] Embodiment 2 The relationship between the SOC of the supercapacitor energy storage system and the voltage across its terminals is not completely linear. Therefore, the SOC of the supercapacitor energy storage system cannot be simply calculated based on the voltage across the supercapacitor energy storage system. So, a method of querying the SOC through the MAP diagram of the supercapacitor energy storage system can be adopted. The MAP of the supercapacitor energy storage system is usually as Figure 2 shown.
[0032] For supercapacitor energy storage systems that have been operating for different lengths of time, their MAP diagrams will also change with the aging attenuation of the supercapacitor. At the same time, this aging attenuation is closely related to the internal resistance of the supercapacitor energy storage system. Therefore, by collecting the same type of supercapacitors that have been operating for different durations, the internal resistance of the supercapacitor is distributed within the interval, is the nominal internal resistance of the supercapacitor; through the experimental method, the MAP diagrams of the collected supercapacitors with different internal resistances are determined; and, through the interpolation method and the extrapolation method, within the interval, at intervals of 0.05 interval, the MAP diagrams when the internal resistance of the supercapacitor is equal to are obtained and saved in the supercapacitor management system, where n = 0, 1, 2…20. For example, the nominal internal resistance of the supercapacitor is 0.56 mΩ. Therefore, between 0.56 mΩ and 1.12 mΩ, a MAP diagram is obtained every 0.028 mΩ, and they are respectively labeled as MAP[0], MAP[1], …MAP[k], MAP
[20] .
[0033] For a supercapacitor energy storage system, the internal resistance of the supercapacitor is measured online . The method for measuring the internal resistance of the supercapacitor each time is as follows: The supercapacitor is charged to the rated voltage and held for 30 minutes, and then discharged with current. Herein , C is the capacitance value of the supercapacitor in F. When the supercapacitor changes from the holding mode to the constant-current discharge mode, the step change amount of the terminal voltage of the supercapacitor is , then the internal resistance of the supercapacitor is .
[0034] For example, the supercapacitor is charged to the rated voltage and held for 30 minutes. The capacitance value of the supercapacitor is 10000 F. Therefore, a current of 500 A can be used to discharge the supercapacitor. When the supercapacitor changes from the holding mode to the discharge mode, the step change amount of the terminal voltage of the supercapacitor is 0.4 V, then the internal resistance of the supercapacitor is 0.8 mΩ, as Figure 3 shown
[0035] During the operation of the supercapacitor, the integral value of the discharge current of the supercapacitor with respect to time is , the rated stored energy of the supercapacitor is , and the units of both are Ah. The equivalent cycle number of the supercapacitor is . Whenever the equivalent cycle number reaches 100 times, a measurement of the internal resistance is performed
[0036] For example, the rated stored energy of the supercapacitor is 10 Ah. Therefore, when the integral value of the discharge current with respect to time of the supercapacitor reaches 1000 Ah during actual operation, a measurement of the internal resistance is performed
[0037] The internal resistances of the supercapacitor obtained from multiple measurements form an internal resistance sequence . The length of the sequence is n, and a typical value of n can be 10. Moreover, each time a new measurement of the internal resistance of the supercapacitor is made, the sequence is shifted once. The earliest measured internal resistance data is removed, and the latest measured internal resistance data is placed in the sequence. Then, the average value of the new sequence data is calculated and used as the current internal resistance of the supercapacitor .
[0038] For example, between the current measurements, the internal resistance sequence of the supercapacitor is [0.80, 0.80, 0.80, 0.81, 0.80, 0.81, 0.80, 0.81, 0.81, 0.81]. If the internal resistance of the supercapacitor obtained from the current measurement is 0.80 mΩ, then the internal resistance sequence of the supercapacitor is updated to [0.80, 0.80, 0.81, 0.80, 0.81, 0.80, 0.81, 0.81, 0.81, 0.80]. Then, the average value of the new sequence data is calculated and used as the current internal resistance of the supercapacitor. It is 0.805 mΩ.
[0039] Let , denote rounding the data to the nearest integer. For example, if the nominal internal resistance of the supercapacitor is 0.56 mΩ, then k = 9. The supercapacitor management system accordingly updates the MAP diagram to the MAP diagram with n = 9, that is, MAP[9], and further obtains the SOC of the supercapacitor energy storage system through MAP[9].
[0040] Embodiment 3 As Figure 1 shown, a MAP update system for a supercapacitor energy storage system provided by the present invention includes the following steps: A supercapacitor collection unit for collecting supercapacitors of the same model that have been operating for different durations, so that the internal resistance of the supercapacitors is distributed within the interval, where is the nominal internal resistance of the supercapacitor; A first MAP diagram determination unit for determining the MAP diagrams of the collected supercapacitors with different internal resistances through an experimental method; A second MAP diagram determination unit for obtaining, through interpolation and extrapolation, the MAP diagrams when the internal resistance of the supercapacitor is equal to at intervals of 0.05 within the interval, and storing them in the supercapacitor management system, where n = 0, 1, 2... 20; An on-line internal resistance measurement unit for on-line measuring the internal resistance of the supercapacitor for the supercapacitor energy storage system ; A MAP diagram update unit for letting , denote rounding the data to the nearest integer, and the supercapacitor management system accordingly updates the MAP diagram to the MAP diagram with n = k.
[0041] Embodiment 4 An electronic device provided by the present invention is characterized by comprising: a processor and a memory coupled to the processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of a MAP update method for a supercapacitor energy storage system are implemented.
[0042] The electronic device may further include one or more of a multimedia component, an input / output (I / O) interface, and a communication component.
[0043] Among them, the processor is used to control the overall operation of the electronic device to complete all or part of the steps in the storage medium sharing method. The memory is used to store various types of data to support the operation of the electronic device. These data may include, for example, instructions for any application program or method operating on the electronic device, as well as application-related data, such as contact data, sent and received messages, pictures, audio, video, and the like. The memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM for short), electrically erasable programmable read-only memory (EEPROM for short), erasable programmable read-only memory (EPROM for short), programmable read-only memory (PROM for short), read-only memory (ROM for short), magnetic memory, flash memory, a magnetic disk, or an optical disc. The multimedia component may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory or sent through the communication component. The audio component further includes at least one speaker for outputting audio signals. The I / O interface provides an interface between the processor and other interface modules, and the above other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component is used for wired or wireless communication between the electronic device and other devices. Wireless communication, such as Wi-Fi, Bluetooth, near field communication (NFC for short), 2G, 3G, or 4G, or a combination of one or more of them. Accordingly, the communication component may include: a Wi-Fi module, a Bluetooth module, and an NFC module.
[0044] In an exemplary embodiment, the electronic device may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the storage medium sharing method.
[0045] Embodiment 5 A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the MAP update method of the supercapacitor energy storage system are implemented.
[0046] Each process and / or block in the flowchart and / or block diagram is implemented by computer program instructions, as well as the combination of processes and / or blocks in the flowchart and / or block diagram. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a system for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.
[0047] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.
[0048] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate computer-implemented processing, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.
[0049] In the method of the present invention, some terms are the same as those in QC / T 741-2014 "Automotive Supercapacitors". Among them, a single cell refers to the basic unit device of a capacitor, including electrodes, separators, electrolytes / liquids, terminals, and casings, etc. The internal resistance refers to the sum of the resistances of the electrolyte / liquid, electrodes, separators, etc. in the capacitor and the internal connection resistance. The nominal internal resistance refers to the internal resistance value of the capacitor provided by the enterprise.
[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.
[0051] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.
Claims
1. A MAP update method for a supercapacitor energy storage system, characterized in that, including the following steps: 1) Collect supercapacitors of the same model that have been operating for different durations, so that the internal resistance of the supercapacitors is distributed within the range, which is the nominal internal resistance of the supercapacitor; 2) By means of the experimental method, determine the MAP graphs of the supercapacitors with different internal resistances collected; 3) By means of interpolation and extrapolation, within interval, every 0.05 interval, obtain the MAP graph when the internal resistance of the supercapacitor is equal to and save it in the supercapacitor management system, where n = 0, 1, 2…20; 4) For the supercapacitor energy storage system, measure the internal resistance of the supercapacitor online ; 5) Let , represent rounding the data to an integer, and the supercapacitor management system correspondingly updates the MAP diagram to the MAP diagram with n = k.
2. The MAP update method for a supercapacitor energy storage system according to claim 1, wherein In step 4), during the operation of the supercapacitor, the integral value of the supercapacitor discharge current with respect to time is , the rated storage energy of the supercapacitor is , and the units of both are Ah. The equivalent cycle number of the supercapacitor is . Whenever the equivalent cycle number meets 100 times, a measurement of the internal resistance is performed.
3. The MAP update method of a supercapacitor energy storage system according to claim 2, characterized in that, In step 4), the method for measuring the internal resistance of the supercapacitor each time is as follows: the supercapacitor is charged to the rated voltage and kept for 30 minutes, and then the supercapacitor is discharged with a current, where , C is the capacitance value of the supercapacitor, with the unit of F. When the supercapacitor changes from the holding mode to the constant-current discharge mode, the step change amount of the terminal voltage of the supercapacitor is , then the internal resistance of the supercapacitor .
4. A MAP update method for a supercapacitor energy storage system according to claim 3, characterized in that, In step 4), the internal resistances of the supercapacitor obtained through multiple measurements form an internal resistance sequence. , the length of the sequence is n, and a typical value of n can be taken as 10. Moreover, each time a new measurement of the internal resistance of the supercapacitor is made, the sequence is shifted once, removing the earliest measured internal resistance data and placing the latest measured internal resistance data in the sequence. Then, the average value of the new sequence data is calculated and used as the current internal resistance of the supercapacitor. .
5. A MAP update method for a supercapacitor energy storage system according to claim 1, characterized in that, In step 1), is the nominal internal resistance of the supercapacitor, that is, the internal resistance of a newly produced supercapacitor with an approximate zero operating time by the supercapacitor manufacturer.
6. A MAP update system for a supercapacitor energy storage system, characterized in that, including the following steps: A supercapacitor collection unit is used to collect supercapacitors of the same model that have been operating for different durations, so that the internal resistance of the supercapacitors is distributed within the range is the nominal internal resistance of the supercapacitor; A first MAP graph determination unit, configured to determine the MAP graphs of the supercapacitors with different internal resistances collected by means of the experimental method; The second MAP graph determination unit is configured to, by means of interpolation and extrapolation, within the interval, every 0.05 interval, obtain a MAP graph when the internal resistance of the supercapacitor is equal to and save it in the supercapacitor management system, where n = 0, 1, 2... 20; Internal resistance online measurement unit, used for online measurement of the internal resistance of supercapacitors in a supercapacitor energy storage system ; MAP map update unit, for making , represent rounding the data to the nearest integer, and the supercapacitor management system correspondingly updates the MAP map to the MAP map with n = k.
7. A MAP update system for a supercapacitor energy storage system according to claim 6, characterized in that, In the internal resistance on-line measurement unit, during the operation of the supercapacitor, the integral value of the discharge current of the supercapacitor with respect to time is , the rated storage energy of the supercapacitor is , the units of both are Ah, and the equivalent cycle number of the supercapacitor is . Whenever the equivalent cycle number meets 100 times, a measurement of the internal resistance is performed.
8. A MAP update system for a supercapacitor energy storage system according to claim 7, characterized in that, In the internal resistance online measurement unit, the method for measuring the internal resistance of the supercapacitor each time is as follows: The supercapacitor is charged to the rated voltage and maintained for 30 minutes, and then the supercapacitor is discharged with a current, where , C is the capacitance value of the supercapacitor, with the unit of F. When the supercapacitor changes from the holding mode to the constant current discharge mode, the step change amount of the terminal voltage of the supercapacitor is , then the internal resistance of the supercapacitor .
9. An electronic device, characterized in that, including: A processor and a memory coupled to the processor, the memory storing a computer program, and when the computer program is executed by the processor, the steps of a MAP update method for a supercapacitor energy storage system according to any one of claims 1-5 are implemented.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of a MAP update method for a supercapacitor energy storage system according to any one of claims 1-5 are implemented.