A method and device for controlling electrolyte flow, electronic equipment and storage medium

Abstract

The application discloses a kind of control method, device, electronic equipment and storage medium of electrolyte flow.The method comprises: detecting the first voltage value of battery module in the current time period in all-vanadium redox flow battery system;The first voltage change rate of the battery module in the current time period is calculated based on the first voltage value;Determine that the first voltage value falls into the first voltage range, and the first voltage change rate threshold value corresponding to the first voltage range;The first comparison result between the first voltage change rate and the first voltage change rate threshold value is used to adjust the electrolyte flow in the all-vanadium redox flow battery system.The application is according to the relationship characteristics between end voltage and flow in the process of all-vanadium redox flow battery charging and discharging, to control motor frequency with the voltage change rate of battery, realize adjusting electrolyte flow, not only avoid the shortcomings of interval oscillation caused by gradient control, effectively reduce the system power consumption, guarantee the efficiency of liquid flow battery and the service life of electrolyte pump.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a method, apparatus, electronic device, and storage medium for controlling electrolyte flow. Background Technology

[0002] One of the main application areas of vanadium redox flow batteries is energy storage for renewable energy sources such as solar and wind power. However, renewable energy power generation systems have unstable and discontinuous unsteady-state characteristics, with significant variations in power output. For vanadium redox flow batteries, different electrolyte temperatures, charge / discharge states, and charge / discharge currents result in different requirements for electrolyte reactants, i.e., different electrolyte flow rates. The electrolyte flow rate determines the pump power consumption, which in turn significantly impacts system efficiency. Currently, existing technologies do not implement frequency conversion control for the motor in vanadium battery systems, leading to high pump consumption and low system efficiency. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a method, apparatus, electronic device and storage medium for controlling electrolyte flow.

[0004] According to one aspect of the embodiments of this application, a method for controlling electrolyte flow rate is provided, comprising:

[0005] Detect the first voltage value of the battery module in the current time period in the vanadium redox flow battery system;

[0006] Calculate the first voltage change rate of the battery module within the current time period based on the first voltage value;

[0007] Determine the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range;

[0008] The electrolyte flow rate in the vanadium redox flow battery system is adjusted based on a first comparison result between the first voltage change rate and the first voltage change rate threshold.

[0009] Furthermore, determining the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range, includes:

[0010] Detect the target operating status of the vanadium redox flow battery system within the current time period;

[0011] Obtain the correspondence between preset operating states and voltage ranges, and determine at least one candidate voltage range corresponding to the target operating state based on the correspondence, wherein the preset operating states include: charging state and discharging state;

[0012] The candidate voltage range into which the first voltage value falls is determined as the first voltage range, and the first voltage change rate threshold corresponding to the first voltage range is obtained.

[0013] Furthermore, adjusting the electrolyte flow rate in the vanadium redox flow battery system based on the first comparison result between the first voltage change rate and the first voltage change rate threshold includes:

[0014] By comparing the first voltage change rate with the first voltage change rate threshold, a first comparison result is obtained;

[0015] Based on the first comparison result, the current motor frequency of the motor in the vanadium redox flow battery system is controlled, wherein the motor frequency is used to control the electrolyte flow rate in the vanadium redox flow battery system.

[0016] Furthermore, controlling the current motor frequency of the motor in the all-vanadium redox flow battery system based on the first comparison result includes:

[0017] If the first comparison result indicates that the voltage change rate is less than or equal to the first voltage change rate threshold, the motor of the vanadium redox flow battery system is controlled to maintain the current motor frequency.

[0018] Furthermore, controlling the current motor frequency of the motor in the all-vanadium redox flow battery system based on the first comparison result includes:

[0019] If the first comparison result shows that the first voltage change rate is greater than the first voltage change rate threshold, the current motor frequency is amplified according to a preset gradient until the voltage change rate after the amplification operation is less than the first voltage change frequency.

[0020] Furthermore, after amplifying the current motor frequency according to a preset gradient, the method further includes:

[0021] Monitor the second voltage value of the battery module after the motor performs an amplification operation, and use the second voltage value to calculate the second voltage change rate;

[0022] Determine the second voltage range into which the second voltage value falls, and the second voltage change rate threshold corresponding to the second voltage range;

[0023] The electrolyte flow rate in the all-vanadium redox flow battery system is adjusted based on a second comparison result between the second voltage change rate and the second voltage change rate threshold.

[0024] Furthermore, adjusting the electrolyte flow rate in the all-vanadium redox flow battery system based on the second comparison result between the second voltage change rate and the second voltage change rate threshold includes:

[0025] If the second comparison result is that the first voltage change rate is greater than the first voltage change rate threshold, the current motor frequency is amplified according to a preset gradient until the voltage change rate after the amplification operation is less than the first voltage change frequency.

[0026] If the second comparison result indicates that the voltage change rate is less than or equal to the first voltage change rate threshold, the motor of the vanadium redox flow battery system is controlled to maintain the current motor frequency.

[0027] According to another aspect of the embodiments of this application, an electrolyte flow control device is also provided, comprising:

[0028] The detection module is used to detect the first voltage value of the battery module in the vanadium redox flow battery system in the current time period;

[0029] The calculation module is used to calculate the first voltage change rate of the battery module in the current time period based on the first voltage value;

[0030] The determination module is used to determine the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range;

[0031] An adjustment module is used to adjust the electrolyte flow rate in the vanadium redox flow battery system based on a first comparison result between the first voltage change rate and the first voltage change rate threshold.

[0032] According to another aspect of the embodiments of this application, a storage medium is also provided, the storage medium including a stored program that executes the above steps when the program is run.

[0033] According to another aspect of the embodiments of this application, an electronic device is also provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; wherein: the memory is used to store computer programs; and the processor is used to execute the steps in the above method by running the programs stored in the memory.

[0034] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the steps in the above-described method.

[0035] Compared with the prior art, the above-mentioned technical solution provided in this application has the following advantages: Based on the characteristics of the relationship between terminal voltage and flow rate during the charging and discharging process of the vanadium redox flow battery, this application controls the motor frequency by the voltage change rate of the battery, and finally realizes the adjustment of electrolyte flow rate. This not only avoids the disadvantage of range oscillation caused by gradient control, but also effectively reduces system power consumption, ensures the efficiency of the flow battery, and extends the service life of the electrolyte pump. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A flowchart illustrating a method for controlling electrolyte flow rate provided in this application embodiment;

[0039] Figure 2 A flowchart illustrating a method for controlling electrolyte flow rate, provided in another embodiment of this application;

[0040] Figure 3 A block diagram of an electrolyte flow control device provided in an embodiment of this application;

[0041] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another similar entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] This application provides a method, apparatus, electronic device, and storage medium for controlling electrolyte flow rate. The method provided by this invention can be applied to any electronic device as needed, such as a server, terminal, or other electronic device. No specific limitation is made here, and for ease of description, it will be referred to as an electronic device below.

[0045] According to one aspect of the embodiments of this application, a method embodiment for controlling electrolyte flow rate is provided. Figure 1 A flowchart of a method for controlling electrolyte flow rate provided in an embodiment of this application is shown below. Figure 1 As shown, the method includes:

[0046] Step S11: Detect the first voltage value of the battery module in the vanadium redox flow battery system during the current time period.

[0047] The method provided in this application is applied to a processor for detecting a vanadium redox flow battery system. The processor can send control commands to multiple sensors deployed on the battery module, so that each sensor executes the control commands to periodically detect the battery module and obtain multiple current detection parameters of the battery module. The detection parameters may include: the voltage value of the battery module, the charging / discharging current, the electrolyte temperature, the flow rate, and other parameters.

[0048] In this embodiment of the application, the processor can obtain the first voltage value of the current time period from the detection parameters. Since the current time period includes at least two detection moments, the first voltage value includes the voltage value corresponding to each detection moment.

[0049] Step S12: Calculate the first voltage change rate of the battery module within the current time period based on the first voltage value.

[0050] In this embodiment of the application, the calculation of the first rate of change of the battery module in the current time period based on the first voltage value may be as follows: obtain the start time and end time of the current time period, then obtain the voltage values ​​corresponding to the start time and end time respectively from the first voltage value, and calculate the first rate of change of the battery module in the current detection period based on the voltage values.

[0051] Step S13: Determine the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range.

[0052] In this embodiment of the application, step S13, determining the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range, includes the following steps A1-A3:

[0053] Step A1: Detect the target operating status of the vanadium redox flow battery system within the current time period.

[0054] In this embodiment, the processor can detect the target operating state of the battery module in the vanadium redox flow battery system within the current time period. The target operating state can be either a charging state or a discharging state.

[0055] Step A2: Obtain the correspondence between preset operating states and voltage ranges, and determine at least one candidate voltage range corresponding to the target operating state based on the correspondence. The preset operating states include: charging state and discharging state.

[0056] In this embodiment of the application, the user can establish a correspondence between preset operating states and voltage ranges. For example, when the battery module is in the charging state, the voltage will be in the rising stage. Therefore, multiple voltage ranges corresponding to the charging state can be established in advance, and different candidate voltage ranges correspond to different voltage change rate thresholds.

[0057] In the embodiments of this application, after determining the current target operating state of the battery module of the vanadium redox flow battery system, at least one candidate voltage range corresponding to the target operating state can be obtained based on the above correspondence.

[0058] Step A3: Determine the candidate voltage range into which the first voltage value falls as the first voltage range, and obtain the first voltage change rate threshold corresponding to the first voltage range.

[0059] In this embodiment, a first voltage value detected within the current time period is matched with a candidate voltage range, and the candidate voltage range into which the first voltage value falls is determined as the first voltage range. Simultaneously, a first voltage change rate threshold corresponding to the first voltage range is obtained.

[0060] As an example, when the first voltage range is 46V–52V, the first voltage change rate threshold is 0.0009V / s. Or, when the first voltage range is 52V–56V, the first voltage change rate threshold is 0.0006V / s. When the first voltage range is 56V–xV, the first voltage change rate threshold is 0.0003V / s, where x is greater than 56V.

[0061] Step S14: Adjust the electrolyte flow rate in the vanadium redox flow battery system based on the first comparison result between the first voltage change rate and the first voltage change rate threshold.

[0062] In this embodiment of the application, step S14, adjusting the electrolyte flow rate in the vanadium redox flow battery system based on a first comparison result between the first voltage change rate and the first voltage change rate threshold, includes the following steps B1-B2:

[0063] Step B1: Compare the first voltage change rate with the first voltage change rate threshold to obtain the first comparison result.

[0064] Step B2: Based on the first comparison result, control the current motor frequency of the motor in the vanadium redox flow battery system, wherein the motor frequency is used to control the electrolyte flow rate in the vanadium redox flow battery system.

[0065] This application embodiment controls the motor frequency by comparing the first voltage change rate with the first voltage change rate threshold, thereby controlling the electrolyte flow rate in the vanadium redox flow battery system.

[0066] In this embodiment of the application, step B2, controlling the current motor frequency of the motor in the vanadium redox flow battery system based on the first comparison result, includes: when the first comparison result is that the voltage change rate is less than or equal to the first voltage change rate threshold, controlling the motor of the vanadium redox flow battery system to maintain the current motor frequency.

[0067] In this embodiment of the application, step B2, controlling the current motor frequency of the motor in the vanadium redox flow battery system based on the first comparison result, includes: when the first comparison result is that the first voltage change rate is greater than the first voltage change rate threshold, increasing the current motor frequency according to a preset gradient until the voltage change rate after the increase operation is less than the first voltage change frequency.

[0068] As an example, when the battery system is charged at a constant power of 15kW, the initial voltage rises to 46V, falling within the voltage range of 46V-52V. The initial motor frequency is set to 25Hz. If the battery voltage change rate is less than or equal to 0.0009V / s, it indicates a slow voltage rise. In this case, the motor continues to operate at the current frequency, and the combined power consumption of the two motors in the system is approximately 0.2kW.

[0069] If the voltage change rate is greater than 0.0009V / S, the battery voltage rises slowly, indicating that the electrolyte flow rate in the system is low and cannot meet the reaction requirements of the battery's active materials. At this point, the given frequency of the motor is increased by 1Hz, and the motor operating frequency is 26Hz. The voltage change rate is then monitored. If it is still greater than 0.0009V / S, the frequency is increased further until the voltage change rate is less than 0.009V / S. At this point, the motor is controlled to operate at the frequency increased to the final level for the current stage.

[0070] Based on the characteristics of the relationship between terminal voltage and flow rate during the charging and discharging process of the vanadium redox flow battery, this embodiment controls the motor frequency by the rate of change of battery voltage during charging or discharging, thereby ultimately regulating the electrolyte flow rate. This not only avoids the disadvantages of range oscillation caused by gradient control, but also effectively reduces the power consumption of the battery system, improves the efficiency of the flow battery system, and extends the service life of the electrolyte pump.

[0071] In this embodiment of the application, after increasing the current motor frequency according to a preset gradient, the method further includes the following steps:

[0072] Step S21: Monitor the second voltage value of the battery module after the motor performs an amplification operation, and use the second voltage value to calculate the second voltage change rate.

[0073] Step S22: Determine the second voltage range into which the second voltage value falls, and the second voltage change rate threshold corresponding to the second voltage range.

[0074] Step S23: Adjust the electrolyte flow rate in the vanadium redox flow battery system based on the second comparison result between the second voltage change rate and the second voltage change rate threshold.

[0075] In this embodiment of the application, step S23, adjusting the electrolyte flow rate in the vanadium redox flow battery system based on a second comparison result between the second voltage change rate and the second voltage change rate threshold, includes:

[0076] If the second comparison result is that the first voltage change rate is greater than the first voltage change rate threshold, the current motor frequency is amplified according to the preset gradient until the voltage change rate after the amplification operation is less than the first voltage change frequency.

[0077] If the second comparison result is that the voltage change rate is less than or equal to the first voltage change rate threshold, the motor of the vanadium redox flow battery system is controlled to maintain the current motor frequency.

[0078] As an example, when the second voltage value of the battery module reaches 52V, it falls within the voltage range of 46V-52V, and the battery voltage change rate is determined to be less than or equal to 0.0006V / S. The motor continues to operate at the current frequency. If the voltage change rate is greater than 0.0006V / S, it indicates that the battery voltage is rising too quickly. At this point, the system increases the motor's set frequency by 1Hz, and continues to monitor the voltage change rate. If it is still greater than 0.0006V / S, the frequency is increased further until the voltage change rate is less than 0.0006V / S. At this point, the motor operates at the frequency after the final increase in the current stage.

[0079] In this embodiment, the battery module voltage is continuously monitored. When the battery module voltage reaches 56V, the rate of change of the battery voltage is detected to be less than or equal to 0.0003V / S, and the motor continues to run at the current frequency. If the battery voltage rises rapidly, with a rate of change greater than 0.0003V / S, the motor's set frequency is increased by 1Hz. The rate of change of the voltage is then monitored again. If it is still greater than 0.0003V / S, the frequency is increased further until the rate of change of the voltage is less than 0.0003V / S. At this point, the motor runs at the frequency increased to the final value of the current stage.

[0080] The method provided in this application increases the motor frequency and then monitors the battery voltage. Based on the monitored voltage, it calculates the voltage change rate and continues to adjust the motor frequency to adjust the electrolyte flow rate under different conditions, effectively reducing power consumption and extending the service life of the electrolyte pump.

[0081] Figure 3 This is a block diagram of an electrolyte flow control device provided in an embodiment of this application. This device can be implemented as part or all of an electronic device through software, hardware, or a combination of both. Figure 3 As shown, the device includes:

[0082] The detection module 31 is used to detect the first voltage value of the battery module in the vanadium redox flow battery system in the current time period.

[0083] The calculation module 32 is used to calculate the first voltage change rate of the battery module in the current time period based on the first voltage value.

[0084] The determination module 33 is used to determine the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range.

[0085] The adjustment module 34 is used to adjust the electrolyte flow rate in the vanadium redox flow battery system based on a first comparison result between a first voltage change rate and a first voltage change rate threshold.

[0086] In this embodiment of the application, the determining module 33 is used to detect the target operating state of the vanadium redox flow battery system within the current time period; obtain the correspondence between the preset operating state and the voltage range, and determine at least one candidate voltage range corresponding to the target operating state based on the correspondence, wherein the preset operating state includes: charging state and discharging state; determine the candidate voltage range into which the first voltage value falls as the first voltage range, and obtain the first voltage change rate threshold corresponding to the first voltage range.

[0087] In this embodiment, the adjustment module 34 is used to compare a first voltage change rate with a first voltage change rate threshold to obtain a first comparison result. Based on the first comparison result, the current motor frequency of the motor in the vanadium redox flow battery system is controlled, wherein the motor frequency is used to control the electrolyte flow rate in the vanadium redox flow battery system.

[0088] In this embodiment, the adjustment module 34 is used to control the motor of the vanadium redox flow battery system to maintain the current motor frequency when the first comparison result is that the voltage change rate is less than or equal to the first voltage change rate threshold.

[0089] In this embodiment of the application, the adjustment module 34 is used to increase the current motor frequency according to a preset gradient when the comparison result is that the first voltage change rate is greater than the first voltage change rate threshold, until the voltage change rate after the increase operation is less than the first voltage change frequency.

[0090] In this embodiment, the electrolyte flow control device includes: a monitoring module, used to monitor the second voltage value of the battery module after the motor performs an amplification operation, and to calculate the second voltage change rate using the second voltage value; to determine the second voltage range into which the second voltage value falls, and the second voltage change rate threshold corresponding to the second voltage range; and to adjust the electrolyte flow rate in the vanadium redox flow battery system based on a second comparison result between the second voltage change rate and the second voltage change rate threshold.

[0091] In this embodiment, the monitoring module is configured to, when the second comparison result is that the first voltage change rate is greater than the first voltage change rate threshold, increase the current motor frequency according to a preset gradient until the voltage change rate after the increase operation is less than the first voltage change frequency; or, when the second comparison result is that the voltage change rate is less than or equal to the first voltage change rate threshold, control the motor of the vanadium redox flow battery system to maintain the current motor frequency.

[0092] This application also provides an electronic device, such as... Figure 4As shown, the electronic device may include: a processor 1501, a communication interface 1502, a memory 1503, and a communication bus 1504, wherein the processor 1501, the communication interface 1502, and the memory 1503 communicate with each other through the communication bus 1504.

[0093] Memory 1503 is used to store computer programs;

[0094] When the processor 1501 executes the computer program stored in the memory 1503, it implements the steps of the above embodiments.

[0095] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0096] The communication interface is used for communication between the aforementioned terminal and other devices.

[0097] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0098] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0099] In another embodiment provided in this application, a computer-readable storage medium is also provided, which stores instructions that, when executed on a computer, cause the computer to perform the electrolyte flow control method described in any of the above embodiments.

[0100] In another embodiment provided in this application, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute the electrolyte flow control method described in any of the above embodiments.

[0101] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state drive).

[0102] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

[0103] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for controlling electrolyte flow rate, characterized in that, include: Detect the first voltage value of the battery module in the current time period in the vanadium redox flow battery system; Calculate the first voltage change rate of the battery module within the current time period based on the first voltage value; Determine the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range; The electrolyte flow rate in the vanadium redox flow battery system is adjusted based on a first comparison result between the first voltage change rate and the first voltage change rate threshold. The step of determining the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range, includes: detecting the target operating state of the vanadium redox flow battery system within the current time period; obtaining the correspondence between a preset operating state and a voltage range, and determining at least one candidate voltage range corresponding to the target operating state based on the correspondence, wherein the preset operating state includes: a charging state and a discharging state; determining the candidate voltage range into which the first voltage value falls as the first voltage range, and obtaining the first voltage change rate threshold corresponding to the first voltage range.

2. The method according to claim 1, characterized in that, Adjusting the electrolyte flow rate in the vanadium redox flow battery system based on a first comparison result between the first voltage change rate and the first voltage change rate threshold includes: By comparing the first voltage change rate with the first voltage change rate threshold, a first comparison result is obtained; Based on the first comparison result, the current motor frequency of the motor in the vanadium redox flow battery system is controlled, wherein the motor frequency is used to control the electrolyte flow rate in the vanadium redox flow battery system.

3. The method according to claim 2, characterized in that, The step of controlling the current motor frequency of the motor in the all-vanadium redox flow battery system based on the first comparison result includes: If the first comparison result indicates that the voltage change rate is less than or equal to the first voltage change rate threshold, the motor of the vanadium redox flow battery system is controlled to maintain the current motor frequency.

4. The method according to claim 2, characterized in that, The step of controlling the current motor frequency of the motor in the all-vanadium redox flow battery system based on the first comparison result includes: If the first comparison result shows that the first voltage change rate is greater than the first voltage change rate threshold, the current motor frequency is amplified according to a preset gradient until the voltage change rate after the amplification operation is less than the first voltage change frequency.

5. The method according to claim 4, characterized in that, After increasing the current motor frequency according to a preset gradient, the method further includes: Monitor the second voltage value of the battery module after the motor performs an amplification operation, and use the second voltage value to calculate the second voltage change rate; Determine the second voltage range into which the second voltage value falls, and the second voltage change rate threshold corresponding to the second voltage range; The electrolyte flow rate in the all-vanadium redox flow battery system is adjusted based on a second comparison result between the second voltage change rate and the second voltage change rate threshold.

6. The method according to claim 5, characterized in that, Adjusting the electrolyte flow rate in the vanadium redox flow battery system based on the second comparison result between the second voltage change rate and the second voltage change rate threshold includes: If the second comparison result is that the first voltage change rate is greater than the first voltage change rate threshold, the current motor frequency is amplified according to a preset gradient until the voltage change rate after the amplification operation is less than the first voltage change frequency. If the second comparison result indicates that the voltage change rate is less than or equal to the first voltage change rate threshold, the motor of the vanadium redox flow battery system is controlled to maintain the current motor frequency.

7. A device for controlling electrolyte flow rate, characterized in that, include: The detection module is used to detect the first voltage value of the battery module in the vanadium redox flow battery system in the current time period; The calculation module is used to calculate the first voltage change rate of the battery module in the current time period based on the first voltage value; The determination module is used to determine the first voltage range into which the first voltage value falls, and the first voltage change rate threshold corresponding to the first voltage range; The adjustment module is used to adjust the electrolyte flow rate in the vanadium redox flow battery system based on a first comparison result between the first voltage change rate and the first voltage change rate threshold. The determination module is used to detect the target operating status of the vanadium redox flow battery system within the current time period; Obtain the correspondence between preset operating states and voltage ranges, and determine at least one candidate voltage range corresponding to the target operating state based on the correspondence. The preset operating states include charging state and discharging state. The candidate voltage range into which the first voltage value falls is determined as the first voltage range, and the first voltage change rate threshold corresponding to the first voltage range is obtained.

8. A storage medium, characterized in that, The storage medium includes a stored program, wherein the program executes the method according to any one of claims 1 to 6 when it is run.

9. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, communication interface, and memory communicate with each other through the communication bus; wherein: Memory, used to store computer programs; A processor for performing the method of any one of claims 1 to 6 by running a program stored in memory.

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