Zinc-bromine flow battery leakage monitoring system and method

Abstract

The invention belongs to the technical field of electrochemical energy storage, and relates to a zinc-bromine flow battery leakage monitoring system and method. Comprising a color developing unit which is arranged on a to-be-monitored assembly of the battery system; the positioning unit is arranged in association with the color developing unit and stores position information of the color developing unit; the analysis unit is used for acquiring the position information of the positioning unit and the image information of the color developing unit; the environment monitoring unit is used for collecting environment parameters around the to-be-monitored component; the judging unit is used for receiving the position information, the image information and the environment parameters; performing color judgment on the image information, and correcting a color judgment result based on the environmental parameters so as to judge whether electrolyte leakage occurs or not; and the alarm unit is used for generating and sending alarm information according to the position information when the electrolyte leakage is judged to occur. According to the invention, real-time zinc-bromine flow battery leakage monitoring with low cost, accurate positioning, high reliability and no need of power supply is realized.

Description

Technical Field

[0001] This invention belongs to the field of electrochemical energy storage technology and relates to a leakage monitoring system and method for zinc-bromine redox flow batteries. Background Technology

[0002] In recent years, with the rapid development of renewable energy, large-scale energy storage technology has increasingly become a key link in ensuring grid stability and achieving efficient energy utilization. Among various energy storage technologies, flow batteries are considered an ideal choice for large-scale energy storage due to their advantages such as independently designable power and capacity, long cycle life, and high safety. Zinc-bromine flow batteries, as a typical representative technology, typically store the positive and negative electrolytes in separate tanks. A circulating pump drives the electrolyte through the stack and pipelines before returning it to the tank, achieving continuous charge and energy conversion. However, because the electrolyte is constantly in a highly acidic and corrosive environment during system operation, components such as pipelines, joints, pumps, and stacks are prone to corrosion and aging over long-term operation, significantly increasing the risk of leakage. Once a leak occurs, it not only causes battery system performance degradation and energy efficiency reduction but may also lead to environmental pollution and even safety accidents. Therefore, developing rapid, accurate, and reliable leak detection and location methods is crucial for ensuring the safe and stable operation of the system.

[0003] Currently, all existing methods for detecting leaks in battery systems have limitations. For example, electrochemical detection requires laying a physical circuit grid in potential leak areas and monitoring changes in circuit status to determine if a leak has occurred. However, this method involves complex wiring, high installation costs, and is susceptible to interference from environmental factors such as humidity and temperature, resulting in a high false alarm rate. Secondly, while fiber optic sensing solutions offer high spatial positioning accuracy, the cost of fiber itself is high, the deployment process is complex, and sensors are prone to corrosion in strong acid environments, leading to performance degradation. This also results in frequent false alarms and insufficient long-term reliability, limiting its practical application. Furthermore, some methods use traditional passive adsorption materials such as test strips for leak identification, but these methods rely entirely on manual inspection and visual judgment, resulting in significant response delays and an inability to achieve real-time alarms and precise location, failing to meet the needs of intelligent operation and maintenance in modern energy storage systems.

[0004] In summary, existing leakage detection technologies are unsuitable for the large-scale, long-term, and highly reliable operation of zinc-bromine flow battery systems due to issues such as high cost, complex deployment, poor corrosion resistance, high false alarm rate, or inability to respond in real time. Summary of the Invention

[0005] To address the problems in the prior art, this invention provides a zinc-bromine flow battery leakage monitoring system and method, which achieves low-cost, accurate positioning, high reliability, and real-time zinc-bromine flow battery leakage monitoring without the need for power supply.

[0006] To achieve the above objectives, the present invention employs the following technical solution: In a first aspect, the present invention provides a zinc-bromine flow battery leakage monitoring system, comprising: A colorimetric unit is installed on the component to be monitored in the battery system; A positioning unit is configured in association with the color display unit and stores the position information of the color display unit; The analysis unit is used to acquire the position information of the positioning unit and the image information of the color display unit; An environmental monitoring unit is used to collect environmental parameters around the component to be monitored; The determination unit is used to receive the location information, image information, and environmental parameters; to perform color determination on the image information, and to correct the color determination result based on the environmental parameters, so as to determine whether electrolyte leakage has occurred. An alarm unit is used to generate and send alarm information based on the location information when an electrolyte leak is detected.

[0007] Preferably, the color development unit is a dual-channel color development test strip, including a substrate layer and a color development layer disposed on the substrate layer.

[0008] Preferably, the colorimetric layer includes a bromine detection layer and a zinc detection layer that are separated from each other and arranged side by side; and the bromine detection layer includes sodium fluorescein, and the zinc detection layer includes dithizone.

[0009] Preferably, the method for color determination of the image information is as follows: When both the bromine detection layer and the zinc detection layer turn green, it is determined that no electrolyte leakage has occurred. An electrolyte leak is determined to have occurred when the bromine detection layer is colorless and / or the zinc detection layer is purplish-red.

[0010] Preferably, the method for determining whether the bromine detection layer is green or colorless, and the method for determining whether the zinc detection layer is green or purplish-red, includes: Convert the image information from the RGB color space to the HSV color space; Based on the hue component H and saturation component S in the HSV color space, the color states of the bromine detection layer and the zinc detection layer are determined respectively. The condition for determining it to be green is: H [G1, G2], and S≥S green ; The condition for determining that something is colorless is: S≤S colorless ; The condition for determining it to be purplish-red is: H [P1, P2], and S≥S purplish red ; Where [G1, G2] is the hue range corresponding to green; [P1, P2] is the hue range corresponding to magenta; S green S represents the saturation threshold for determining green. purplish red S is the saturation threshold for determining purple-red; colorless This is the saturation threshold for determining colorlessness.

[0011] Preferably, the environmental parameters include ambient light intensity and ambient temperature; the method for correcting the color determination result based on the environmental parameters is as follows: It has multiple pre-stored saturation thresholds corresponding to different light intensity ranges, as well as multiple hue ranges corresponding to different temperature ranges; Based on the currently acquired ambient light intensity, determine the light intensity range to which it belongs, and call the corresponding saturation threshold group to update S. green S purplish red and S colorless ; The temperature range to which it belongs is determined based on the currently acquired ambient temperature, and the corresponding hue range group is called to update [G1, G2] and [P1, P2]; The threshold values ​​in the saturation threshold group decrease as the corresponding light intensity range increases; the boundary values ​​of the hue range group are set according to their corresponding temperature ranges.

[0012] Preferably, the positioning unit is a QR code printed with fluorocarbon resin ink, and the encoding rule of the QR code includes the region-row-column coordinate information of the color display unit.

[0013] Preferably, the analysis unit is an application mounted on a mobile terminal, which synchronously scans the positioning unit to obtain the location information of the color display unit and the image information of the color display unit by calling the camera of the mobile terminal.

[0014] Preferably, the component to be monitored includes at least one of a positive electrode storage tank, a negative electrode storage tank, a fuel cell stack, and a pipeline.

[0015] Secondly, the present invention provides a method for monitoring leakage in a zinc-bromine flow battery, comprising the following steps: The color display unit is placed on the component of the battery system to be monitored, and the positioning unit is associated with the color display unit. The analysis unit obtains the location information in the positioning unit and the image information in the color display unit. The environmental parameters around the component to be monitored are collected by the environmental monitoring unit. The location information, image information, and environmental parameters are sent to the determination unit; The determination unit performs color determination on the received image information and corrects the color determination result based on the environmental parameters to determine whether electrolyte leakage has occurred. When an electrolyte leak is detected, the alarm unit generates an alarm message containing the location of the leak point based on the location information and sends the alarm message.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By utilizing the specific chemical reaction between the colorimetric unit and the electrolyte components, rapid, intuitive, and highly sensitive visual perception of leaks is achieved. Physically linking the positioning unit with the colorimetric unit ensures precise binding of leak information with spatial location information, thereby enabling rapid and accurate location of the leak point. Real-time acquisition of ambient light and temperature by the environmental monitoring unit provides crucial environmental compensation parameters for the color recognition process, effectively overcoming the interference of light fluctuations and temperature changes on color determination in complex industrial environments. The determination unit dynamically corrects the color determination results based on environmental parameters, establishing an adaptive intelligent recognition mechanism. This invention achieves full automation and intelligence from leak occurrence and identification to location and reporting, significantly improving operation and maintenance response speed and system security. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a zinc-bromine redox flow battery leakage monitoring system according to the present invention.

[0019] The components include: 1. Color display unit; 2. Positioning unit; 3. Analysis unit; 4. Environmental monitoring unit; 5. Components to be monitored; 6. Judgment unit; and 7. Alarm unit. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings: The first objective of this invention is to provide a zinc-bromine flow battery leakage monitoring system, such as... Figure 1 As shown, it includes: The color display unit 1 is disposed on the component 5 to be monitored in the battery system; Positioning unit 2 is associated with color display unit 1 and stores the position information of color display unit 1; Analysis unit 3 is used to obtain the position information of positioning unit 2 and the image information of color display unit 1; Environmental monitoring unit 4 is used to collect environmental parameters around the component to be monitored 5; The determination unit 6 is used to receive the location information, image information and environmental parameters; to determine the color of the image information and to correct the color determination result based on the environmental parameters in order to determine whether electrolyte leakage has occurred. Alarm unit 7 is used to generate and send alarm information based on the location information when an electrolyte leak is detected.

[0027] The zinc-bromine flow battery leakage monitoring system of this invention achieves accurate and efficient identification and location of leaks through the synergistic effect of its various units. The colorimetric unit 1, as the system's sensing unit, utilizes a specific chemical reaction to transform a leak in the bromine or zinc electrolyte into a significant color change that is identifiable to the naked eye or a machine, thus achieving high sensitivity and selectivity in capturing the essential characteristics of electrolyte leaks. The location unit 2 is physically linked to the colorimetric unit 1, assigning a unique identifier and location coordinates to each monitoring point. This allows the system to not only issue a "leakage" alarm when a leak is detected but also accurately report "where the leak is," providing crucial location information for rapid response and repair. The analysis unit 3 synchronously acquires the location and image information from the colorimetric unit 1, providing a complete data foundation for subsequent judgment. The environmental monitoring unit 4 collects environmental parameters, providing necessary environmental compensation for color judgment and effectively improving identification accuracy. The judgment unit 6 uses a color recognition algorithm to intelligently analyze color changes, transforming simulated, qualitative visual signals into digital, quantitative judgment criteria, and correcting the judgment results based on environmental parameters, providing reliable data support for subsequent decision-making. Alarm unit 7 automatically determines the cause of the leak based on the analysis results. When a leak is confirmed, it integrates the abstract leak signal with the specific location information into a clear alarm command and pushes it to the management platform in real time. This completes the closed loop from "perception" to "decision" to "execution", which greatly improves the intelligence level of operation and maintenance management and the efficiency of emergency response.

[0028] For example, the color development unit 1 is a dual-channel color development test strip, including a substrate layer and a color development layer disposed on the substrate layer.

[0029] The substrate layer is a hydrophobic and breathable membrane made of polytetrafluoroethylene (PTFE) reinforced glass fiber. This substrate layer possesses superhydrophobic properties (water contact angle greater than 130°) and a precise pore size (0.1~0.5μm), effectively blocking liquid water and dust in the environment and preventing false alarms caused by factors such as environmental humidity. Simultaneously, its porosity is over 92%, ensuring that leaked substances such as bromine electrolyte and zinc electrolyte can quickly permeate and react with the colorimetric layer, guaranteeing the sensitivity and speed of monitoring. Furthermore, this substrate layer exhibits excellent resistance to strong acid corrosion, maintaining structural and functional stability in harsh chemical environments such as pH=1.5 for extended periods. This fundamentally overcomes the technical limitations of traditional fiber optic sensors, such as susceptibility to corrosion and shortened lifespan under strong acid conditions, providing a reliable guarantee for the long-term reliable operation of the colorimetric unit 1 in the zinc-bromine flow battery system.

[0030] The colorimetric layer comprises a bromine detection layer and a zinc detection layer, which are separated from each other and arranged side by side. The bromine detection layer includes sodium fluorescein, and the zinc detection layer includes dithizone. The bromine detection layer utilizes the characteristic of sodium fluorescein specifically reacting with elemental bromine to produce a color, specifically for monitoring bromine electrolyte leaks. The zinc detection layer utilizes the characteristic of dithizone complexing with zinc ions to produce a color, specifically for monitoring zinc electrolyte leaks. This physically isolated dual-channel design ensures that the two key leaking components do not interfere with each other, and can clearly and definitively distinguish the types of leaked substances based on different color changes (fading or color development). This not only significantly improves the accuracy of monitoring but also provides crucial diagnostic criteria for quickly locating the source of the fault and guiding subsequent maintenance strategies. Compared with traditional electrochemical methods and fiber optic sensing methods, this invention, based on chemical reagent colorimetric monitoring, does not require complex physical circuits or expensive fiber optic sensors, and has higher sensitivity and selectivity.

[0031] For example, the method for color determination of the image information is as follows: When both the bromine detection layer and the zinc detection layer turn green, it is determined that no electrolyte leakage has occurred. An electrolyte leak is determined to have occurred when the bromine detection layer is colorless and / or the zinc detection layer is purplish-red.

[0032] Under normal, leak-free conditions, the stable sodium fluorescein molecule in the bromine detection layer contains a fluorescein parent ring, which gives it its characteristic green color. When the highly oxidizing bromine electrolyte comes into contact with the bromine detection layer, it irreversibly oxidizes and destroys the conjugated chromophore structure of sodium fluorescein, causing changes or degradation in its molecular structure. This results in the loss of its characteristic absorption of visible light, macroscopically manifested as the fading of the green color, turning it colorless. Dithizone itself is green in its free state. When it encounters leaked zinc electrolyte, the nitrogen and sulfur atoms in the dithizone molecule can act as coordinating atoms, specifically coordinating with zinc ions to form a hydrophobic dithizone-zinc complex with a fixed composition. This newly formed complex molecule has a conjugated system structure that is completely different from that of free dithizone, and its maximum absorption wavelength undergoes a red shift, thus macroscopically exhibiting a bright purplish-red color. The entire monitoring process relies on the passive reaction between the chemical reagents and the leaked components of the electrolyte, requiring no additional power supply and consuming almost zero energy. This not only reduces the system's operating costs but also avoids monitoring blind spots that may result from power supply issues, thus improving the system's reliability and stability.

[0033] The method for determining whether the bromine detection layer is green or colorless, and the method for determining whether the zinc detection layer is green or purplish-red, includes: Convert the image information from the RGB color space to the HSV color space; Based on the hue component H and saturation component S in the HSV color space, the color states of the bromine detection layer and the zinc detection layer are determined respectively. The condition for determining it to be green is: H [G1, G2], and S≥S green ; The condition for determining that something is colorless is: S≤S colorless ; The condition for determining it to be purplish-red is: H [P1, P2], and S≥S purplish red ; Where [G1, G2] is the hue range corresponding to green; [P1, P2] is the hue range corresponding to magenta; S green S represents the saturation threshold for determining green. purplish red S is the saturation threshold for determining purple-red; colorless This is the saturation threshold for determining colorlessness.

[0034] This invention decomposes color determination into independent judgments of two dimensions: hue and saturation. The hue component H precisely defines the spectral range of the target color (green or magenta), fundamentally avoiding misjudgments between similar colors. Simultaneously, the saturation component S is introduced as a key auxiliary criterion, effectively distinguishing the true color signal from low-saturation, dark areas caused by insufficient light, reagent attenuation, or background interference. This dual-parameter collaborative determination strategy overcomes the inherent weakness of single RGB values ​​being susceptible to ambient light, thus achieving highly reliable and stable automated identification of color rendering states in complex and ever-changing industrial scenarios.

[0035] The environmental parameters include ambient light intensity and ambient temperature; the method for correcting the color determination result based on the environmental parameters is as follows: It has multiple pre-stored saturation thresholds corresponding to different light intensity ranges, as well as multiple hue ranges corresponding to different temperature ranges; Based on the currently acquired ambient light intensity, determine the light intensity range to which it belongs, and call the corresponding saturation threshold group to update S. green S purplish red and S colorless ; The temperature range to which it belongs is determined based on the currently acquired ambient temperature, and the corresponding hue range group is called to update [G1, G2] and [P1, P2]; The threshold values ​​in the saturation threshold group decrease as the corresponding light intensity range increases; the boundary values ​​of the hue range group are set according to their corresponding temperature ranges.

[0036] This invention significantly improves the accuracy and robustness of leak detection by dynamically correcting color judgment using ambient light intensity and temperature parameters. Specifically, the system pre-stores multiple sets of saturation thresholds corresponding to different light intensity ranges and dynamically adjusts the judgment thresholds based on real-time light intensity—the stronger the light, the lower the saturation threshold, effectively overcoming the misjudgment problem caused by saturation decay in color recognition under strong light. Simultaneously, corresponding hue ranges are pre-stored for different temperature ranges, and the hue judgment boundary is dynamically calibrated based on real-time temperature, eliminating the interference of temperature changes on the hue characteristics of the colorimetric reagent. This adaptive correction mechanism based on environmental parameters enables the system to effectively compensate for the impact of light and temperature fluctuations on color recognition in complex industrial environments, significantly reducing false alarms and missed detections, and ensuring the consistency and reliability of monitoring results under different environmental conditions.

[0037] For example, the positioning unit 2 is a QR code printed with fluorocarbon resin ink. The encoding rules of the QR code include the area-row-column coordinate information of the color display unit 1. The fluorocarbon resin ink gives the QR code excellent resistance to strong acid corrosion, ensuring that it can maintain graphic integrity and information readability for a long time in the harsh chemical environment of the battery system. By converting the physical location into a structured digital code, the positioning unit 2 gives each color display unit 1 a unique identifier, realizing a precise mapping of the leak point from physical space to the digital system, constructing the topological foundation of the entire monitoring network, so that subsequent alarm information can be directly associated with specific equipment and location coordinates. This method is not only low-cost and easy to deploy, but also enables precise location of the leak point, overcoming the problem that traditional methods are difficult to quickly determine the location of the leak.

[0038] For example, the analysis unit 3 is an application mounted on a mobile terminal. It simultaneously scans the positioning unit 2 to obtain the location information of the color display unit 1 and acquires the image information of the color display unit 1 by calling the mobile terminal's camera. Maintenance personnel can quickly obtain the precise coordinates of the color display unit 1 by scanning a QR code with a regular mobile phone, and simultaneously acquire the image information of the color display unit 1 through the camera. This completely changes the inefficient workflow of separating location recording and status judgment in traditional manual inspections, significantly improving the standardization and data accuracy of inspection operations, and laying a solid foundation for the intelligent operation and maintenance management of energy storage power stations.

[0039] In practical applications, the monitored component 5 includes, but is not limited to: a positive electrode storage tank, a negative electrode storage tank, a fuel cell stack (the core site of the electrochemical reaction), and pipelines and interfaces connecting the various components to form a circulation system. By deploying monitoring points on key surfaces of the positive and negative electrode storage tanks (such as the bottom of the tank and the gas phase space), leakage of the electrolyte can be directly monitored; by placing monitoring points on the fuel cell stack casing and end plates, leakage caused by sealing failure can be effectively detected; and by using a spiral winding method to install the components at weak points such as pump valve joints and pipe flanges, leakage risks in the circulation pipeline can be accurately located.

[0040] A second objective of this invention is to provide a method for monitoring leakage in a zinc-bromine flow battery, comprising the following steps: The color display unit 1 is placed on the component 5 to be monitored in the battery system, and the positioning unit 2 is associated with the color display unit 1. The analysis unit 3 obtains the position information in the positioning unit 2 and the image information in the color display unit 1. The environmental parameters around the component 5 to be monitored are collected by the environmental monitoring unit 4. The location information, image information, and environmental parameters are sent to the determination unit 6; The determination unit 6 performs color determination on the received image information and corrects the color determination result based on the environmental parameters to determine whether electrolyte leakage has occurred. When an electrolyte leak is detected, the alarm unit 7 generates alarm information containing the location of the leak point based on the location information and sends the alarm information, which includes the location information corresponding to the positioning unit 2.

[0041] This invention establishes a complete monitoring network through systematic deployment, ensuring full coverage of key equipment. Subsequently, analysis unit 3 synchronously collects location and image information, guaranteeing the accuracy of data correlation and inspection efficiency. Judgment unit 6 intelligently analyzes the color display status, effectively avoiding errors from manual judgment. Upon detecting a leak, it automatically generates alarm information containing precise location coordinates, achieving a complete closed loop from leak detection to precise location and rapid response. This invention's monitoring method significantly improves the reliability and timeliness of leak detection, enhancing the safe operation and maintenance level of energy storage power stations.

[0042] Specifically, the method of the present invention includes: S1. Cut the test strip into standard 10cm×10cm grid units. Coat the designated areas with bromine and zinc detection layers respectively. Dry and cure the coated test strips at a constant temperature of 60℃ for 10 minutes to obtain colorimetric unit 1. Affix a QR code label printed with fluorocarbon resin ink to the designated position on the front of the test strip, and evenly coat the back of the test strip with corrosion-resistant pressure-sensitive adhesive.

[0043] S2. Install the color display unit 1 on each of the battery system's monitored components 5 according to the power station equipment layout diagram. Specifically, this includes: attaching it in a crisscross pattern to the bottom of the positive and negative electrode storage tanks; evenly distributing it on the surface of the battery stack casing; and attaching it in a spiral winding manner at pipe interfaces. The installation spacing of all monitoring points is strictly controlled within the range of 8-15cm to ensure full coverage of the monitoring network. After deployment, scan all QR code labels using the analysis unit 3 (mobile terminal application) to complete the digital registration of the monitoring points and construct a complete power station monitoring topology map in the system.

[0044] S3. Maintenance personnel perform data collection according to the predetermined inspection plan using a mobile terminal application. The mobile phone camera is used to simultaneously perform the following operations: scan QR code labels, automatically parse and obtain the area-row-column coordinate information of the monitoring point; and simultaneously capture real-time high-definition image information from color display unit 1. Environmental monitoring unit 4 simultaneously collects ambient light intensity and ambient temperature parameters around the monitored component 5.

[0045] S3. After receiving location and image information from the mobile terminal application, the judgment unit 6 analyzes the following: First, it converts the acquired image information from the RGB color space to the HSV color space to eliminate interference caused by changes in ambient light. Then, based on the hue component H and saturation component S in the HSV color space, it quantitatively analyzes the color states of the bromine detection layer and the zinc detection layer, respectively. Based on the real-time data provided by the environmental monitoring unit 4, it dynamically adjusts the color judgment parameters—updating S by calling the corresponding saturation threshold group according to the current light intensity. green S purplish red and S colorless Based on the current temperature, the corresponding hue range group is called, and [G1, G2] and [P1, P2] are updated. Based on preset color determination rules, the color state of each detection layer is accurately determined through specific hue range thresholds and saturation thresholds.

[0046] S4. When the analysis results determine that an electrolyte leak has occurred at the monitoring point, the system automatically generates an alarm message including the specific coordinates of the leak location and pushes it to the power plant management platform in real time via the wireless network. After receiving the alarm message, the platform highlights the location of the leak point in the power plant monitoring topology map and automatically generates the optimal inspection route to guide maintenance personnel to quickly reach the site for handling.

[0047] Example 1 Test strips were deployed in the vapor phase zone of the bromine tank in the 1MWh zinc-bromine flow battery system. During actual operation, when a trace amount of bromine vapor leaked from the bromine electrolyte, the bromine detection layer underwent a significant color change within 3 seconds; the green characteristic quickly disappeared, turning colorless. After maintenance personnel identified this color change using a mobile application, the system immediately and automatically pushed the leak coordinates to the management platform and triggered an audible and visual alarm.

[0048] Example 2 Test strips are installed at the outlet valve of the circulating pump using a spiral winding method. When a zinc electrolyte leak occurs, the zinc detection layer turns a distinct purplish-red color within 2 seconds. After maintenance personnel accurately capture this color change using a mobile terminal application, they simultaneously push the leak coordinate information to the management platform and issue an alarm.

[0049] Example 3 Comparative tests were conducted in a coastal power station environment with humidity as high as 95%, with test strips installed on the monitored component 5 of the coastal power station. The results showed that the traditional electrochemical monitoring scheme produced 21 false alarms in 100 scan tests, while this embodiment, thanks to the excellent performance of the hydrophobic and breathable membrane, effectively blocked the interference of liquid water while ensuring the normal permeation of bromine vapor, achieving a perfect performance of zero false alarms.

[0050] Example 4 The test strips were subjected to long-term testing in an accelerated aging environment of 60℃ and 40% hydrogen bromide solution. Data showed that the colorimetric sensitivity remained at 98% after 3 months, and the tensile strength retention rate of the glass fiber substrate reached 92% after 6 months.

[0051] Example 5 In practical applications, after scanning the QR code, maintenance personnel can access the power plant's 3D model and automatically mark the leak location via a mobile application. Furthermore, based on an intelligent path planning algorithm, it can calculate the optimal repair path from the personnel's current location to the leak point. Statistics show that this function can save up to 67% of repair time, significantly improving maintenance efficiency.

[0052] Through comprehensive verification of the above embodiments, the present invention demonstrates superior performance in terms of monitoring sensitivity, environmental adaptability, durability, and operation and maintenance efficiency, providing a reliable technical guarantee for the safe and stable operation of zinc-bromine flow battery systems. Furthermore, the system can be easily deployed for both new power plants and the renovation of existing ones, significantly reducing installation costs and complexity, and possessing excellent scalability. During operation and maintenance, staff only need to use a common mobile terminal APP to complete all monitoring operations, without relying on specialized equipment or complex training, greatly reducing learning costs and operational barriers, making it particularly suitable for the promotion and application of large-scale energy storage power plants.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A zinc-bromine flow battery leakage monitoring system, characterized in that, include: A color display unit (1) is disposed on the component (5) to be monitored in the battery system; The positioning unit (2) is associated with the color display unit (1) and stores the position information of the color display unit (1); Analysis unit (3) is used to obtain the position information of the positioning unit (2) and the image information of the color display unit (1); The environmental monitoring unit (4) is used to collect environmental parameters around the component to be monitored (5); The determination unit (6) is used to receive the location information, image information and environmental parameters; to perform color determination on the image information and to correct the color determination result based on the environmental parameters in order to determine whether electrolyte leakage has occurred. The alarm unit (7) is used to generate and send alarm information based on the location information when an electrolyte leak occurs.

2. The zinc-bromine redox flow battery leakage monitoring system according to claim 1, characterized in that, The color development unit (1) is a dual-channel color development test strip, including a substrate layer and a color development layer disposed on the substrate layer.

3. The zinc-bromine redox flow battery leakage monitoring system according to claim 2, characterized in that, The colorimetric layer includes a bromine detection layer and a zinc detection layer that are separated from each other and arranged side by side; and the bromine detection layer includes sodium fluorescein, and the zinc detection layer includes dithizone.

4. The zinc-bromine redox flow battery leakage monitoring system according to claim 3, characterized in that, The method for color determination of the image information is as follows: When both the bromine detection layer and the zinc detection layer turn green, it is determined that no electrolyte leakage has occurred. An electrolyte leak is determined to have occurred when the bromine detection layer is colorless and / or the zinc detection layer is purplish-red.

5. The zinc-bromine redox flow battery leakage monitoring system according to claim 4, characterized in that, The method for determining whether the bromine detection layer is green or colorless, and the method for determining whether the zinc detection layer is green or purplish-red, includes: Convert the image information from the RGB color space to the HSV color space; Based on the hue component H and saturation component S in the HSV color space, the color states of the bromine detection layer and the zinc detection layer are determined respectively. The condition for determining it to be green is: H [G1, G2], and S≥S green ; The condition for determining that something is colorless is: S≤S colorless ; The condition for determining it to be purplish-red is: H [P1, P2], and S≥S purplish red ; Where [G1, G2] is the hue range corresponding to green; [P1, P2] is the hue range corresponding to magenta; S green S represents the saturation threshold for determining green. purplish red S is the saturation threshold for determining purple-red; colorless This is the saturation threshold for determining colorlessness.

6. The zinc-bromine redox flow battery leakage monitoring system according to claim 5, characterized in that, The environmental parameters include ambient light intensity and ambient temperature; the method for correcting the color determination result based on the environmental parameters is as follows: It has multiple pre-stored saturation thresholds corresponding to different light intensity ranges, as well as multiple hue ranges corresponding to different temperature ranges; Based on the currently acquired ambient light intensity, determine the light intensity range to which it belongs, and call the corresponding saturation threshold group to update S. green S purplish red and S colorless ; The temperature range to which it belongs is determined based on the currently acquired ambient temperature, and the corresponding hue range group is called to update [G1, G2] and [P1, P2]; The threshold values ​​in the saturation threshold group decrease as the corresponding light intensity range increases; the boundary values ​​of the hue range group are set according to their corresponding temperature ranges.

7. The zinc-bromine redox flow battery leakage monitoring system according to claim 1, characterized in that, The positioning unit (2) is a QR code printed with fluorocarbon resin ink. The encoding rules of the QR code include the area-row-column coordinate information of the color display unit (1).

8. The zinc-bromine redox flow battery leakage monitoring system according to claim 1, characterized in that, The analysis unit (3) is an application mounted on a mobile terminal. It scans the positioning unit (2) by calling the camera of the mobile terminal to obtain the location information of the color display unit (1) and the image information of the color display unit (1).

9. The zinc-bromine redox flow battery leakage monitoring system according to claim 1, characterized in that, The component to be monitored (5) includes at least one of a positive electrode storage tank, a negative electrode storage tank, a fuel cell stack, and a pipeline.

10. A method for monitoring leakage in a zinc-bromine flow battery, characterized in that, The system based on any one of claims 1 to 9 includes the following steps: The color display unit (1) is placed on the component (5) to be monitored in the battery system, and the positioning unit (2) is associated with the color display unit (1). The analysis unit (3) obtains the position information in the positioning unit (2) and the image information in the color display unit (1); The environmental parameters around the component to be monitored (5) are collected by the environmental monitoring unit (4); The location information, image information and environmental parameters are sent to the determination unit (6); The determination unit (6) performs color determination on the received image information and corrects the color determination result based on the environmental parameters to determine whether electrolyte leakage has occurred. When an electrolyte leak is detected, the alarm unit (7) generates alarm information containing the location of the leak point based on the location information and sends the alarm information.

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