Combined monitoring method and apparatus for hydrogen and temperature in a battery energy storage power plant

Abstract

A method and apparatus, electronic device, computer-readable storage medium, computer program product, and computer program for combined monitoring of hydrogen and temperature in a battery energy storage power plant. The method includes the steps of: acquiring a first temperature and a second temperature of at least one monitor point in each monitor unit based on a group (1) of optical fibers arranged on the surface of the battery in each monitor unit, the group (1) of optical fibers including at least a first optical fiber for measuring the first temperature of the battery body and a second optical fiber having a surface coated with a hydrogen-sensitive material for measuring the second temperature outside the battery (101); and determining a hydrogen concentration at each monitor point based on a difference between the first temperature and the second temperature corresponding to each monitor point (102).

Description

Technical Field

[0001] <Cross - reference to Related Applications> This disclosure claims the priority of a Chinese patent application with the application number 2023100525884, filed in China on February 2, 2023, and the entire content thereof is incorporated herein by reference.

[0002] This disclosure relates to the field of risk control, and particularly to a method and apparatus for composite monitoring of hydrogen and temperature in a battery energy storage power plant, an electronic device, a computer - readable storage medium, a computer program product, and a computer program.

Background Art

[0003] Under the background of the goal strategy of "carbon peak and carbon neutrality", lithium - ion batteries are widely applied in energy storage systems due to many advantages such as high energy density, high power density, high energy conversion efficiency, long cycle life, and environmental friendliness. However, with the deterioration of the battery, the lithium battery may experience thermal runaway, resulting in a rapid increase in temperature, a large amount of hydrogen release, and the possibility of safety accidents. Therefore, in order to ensure the safe and stable operation of a battery energy storage power plant, a safe and reliable hydrogen and temperature monitoring method is urgently needed.

Summary of the Invention

[0004] Embodiments of this disclosure propose a method and apparatus for composite monitoring of hydrogen and temperature in a battery energy storage power plant, an electronic device, a computer - readable storage medium, a computer program product, and a computer program. The specific technical solutions are as follows.

[0005] An embodiment of one aspect of this disclosure provides a method for composite monitoring of hydrogen and temperature in a battery energy storage power plant. The method includes: A step of obtaining a first temperature and a second temperature at at least one monitor point in each monitor unit based on a group of optical fibers arranged on the surface of the battery within each monitor unit, wherein the group of optical fibers includes at least a first optical fiber for measuring the first temperature of the battery body and a second optical fiber coated with a hydrogen-sensitive material on its surface for measuring the second temperature outside the battery. A step of determining the hydrogen concentration at each of the monitor points based on the difference between the first temperature and the second temperature corresponding to each of the monitor points, wherein the temperature increment of the second optical fiber at different hydrogen concentrations is tested in advance, the temperature increment of the second optical fiber at the different hydrogen concentrations is fitted to establish a correlation function between hydrogen concentration and temperature increment, and the hydrogen concentration at each of the monitor points is determined based on the difference between the first temperature and the second temperature corresponding to each of the monitor points and the correlation function, The step of obtaining the first and second temperatures of at least one monitor point in each monitor unit based on a group of optical fibers arranged on the battery surface within each monitor unit is: A step of controlling a laser corresponding to the group of optical fibers to emit laser light at a predetermined time interval, A step of determining target backscattered light corresponding to each of the monitor points in the first optical fiber and the second optical fiber, based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light, wherein the reference backscattered light is the backscattered light generated at each position of the laser light in the first optical fiber and the second optical fiber, The process includes the step of determining the first and second temperatures of each monitor point based on the intensities of Stokes light and anti-Stokes light in the target backscattered light corresponding to each of the monitor points of the first and second optical fibers, respectively. Here, determining the target backscattered light corresponding to each of the monitor points in the first optical fiber based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light is: The method includes determining the location where Raman scattering corresponding to each of the reference backscattered rays occurs in the first optical fiber based on the time difference between the reception time and the emission time of the laser light in the first optical fiber and the propagation speed of the laser light in the first optical fiber, matching the location of each monitor point with the location where Raman scattering corresponding to each of the reference backscattered rays occurs in the first optical fiber, and determining the corresponding target backscattered rays in the first optical fiber for each monitor point. Determining the first temperature of each monitor point based on the intensities of Stokes light and anti-Stokes light in the target backscattered light corresponding to each of the monitor points of the first optical fiber and the second optical fiber is: The method includes determining a scattering position corresponding to each of the reference backscattered light based on the time difference between the reception time of each of the reference backscattered light in the first optical fiber and the emission time of the laser light, determining a first temperature of the scattering position corresponding to each of the reference backscattered light in the first optical fiber based on the intensity of the Stokes light and the anti-Stokes light in each of the reference backscattered light, and determining the average value of the first temperatures of each scattering position in the monitoring section corresponding to each of the monitoring points as the first temperature of each of the monitoring points.

[0006] An embodiment of another aspect of this disclosure provides a combined hydrogen and temperature monitoring device for a battery energy storage power plant, the device being applied to a server, An acquisition module for acquiring a first temperature and a second temperature at at least one monitor point in each monitor unit, based on a group of optical fibers arranged on the surface of the battery within each monitor unit, wherein the group of optical fibers includes at least a first optical fiber for measuring the first temperature of the battery body and a second optical fiber coated with a hydrogen-sensitive material on its surface for measuring the second temperature outside the battery. A determination module for determining the hydrogen concentration at each of the monitor points based on the difference between the first temperature and the second temperature corresponding to each of the monitor points, wherein the temperature increment of the second optical fiber at different hydrogen concentrations is tested in advance, the temperature increment of the second optical fiber at the different hydrogen concentrations is fitted to establish a correlation function between hydrogen concentration and temperature increment, and the determination module determines the hydrogen concentration at each of the monitor points based on the difference between the first temperature and the second temperature corresponding to each of the monitor points and the correlation function, The acquisition module, The lasers corresponding to the group of optical fibers are controlled at predetermined time intervals to emit laser light. Based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light, the target backscattered light corresponding to each of the monitor points of the first optical fiber and the second optical fiber is determined, where the reference backscattered light is the backscattered light generated by the laser light at each position of the first optical fiber and the second optical fiber. Based on the intensities of Stokes light and anti-Stokes light in the target backscatter light corresponding to each of the monitor points of the first optical fiber and the second optical fiber, the first and second temperatures of each monitor point are determined. Here, determining the target backscattered light corresponding to each of the monitor points in the first optical fiber based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light is: The method includes determining the location where Raman scattering corresponding to each reference backscattered light occurs in the first optical fiber based on the time difference between the reception time and the emission time of the laser light in the first optical fiber and the propagation speed of the laser light in the first optical fiber, matching the location of each monitor point with the location where Raman scattering corresponding to each reference backscattered light occurs in the first optical fiber, and determining the corresponding target backscattered light in the first optical fiber for each monitor point. Determining the first temperature of each monitor point based on the intensities of Stokes light and anti-Stokes light in the target backscattered light corresponding to each of the monitor points of the first optical fiber and the second optical fiber is: The method includes determining a scattering position corresponding to each of the reference backscattered light based on the time difference between the reception time of each of the reference backscattered light in the first optical fiber and the emission time of the laser light, determining a first temperature of the scattering position corresponding to each of the reference backscattered light in the first optical fiber based on the intensity of the Stokes light and the anti-Stokes light in each of the reference backscattered light, and determining the average value of the first temperatures of each scattering position in the monitoring section corresponding to each of the monitoring points as the first temperature of each of the monitoring points.

[0007] An embodiment of another aspect of this disclosure provides a computer device comprising a processor and memory, Here, the processor implements the method of the first embodiment of the present disclosure by reading executable program code stored in memory and executing a program corresponding to the executable program code.

[0008] An embodiment of another aspect of the present disclosure provides a computer-readable storage medium in which a computer program is stored, and when the program is executed by a processor, the method of the embodiment of the first aspect of the present disclosure is realized.

[0009] An embodiment of another aspect of the present disclosure provides a computer program product in which a computer program is stored, and when the computer instructions are executed by a processor, the method of the embodiment of the first aspect of the present disclosure is realized.

[0010] Another embodiment of the present disclosure provides a computer program including computer program code, which, when executed by a computer, causes the computer to perform the method of the first embodiment of the present disclosure.

[0011] Additional aspects and advantages of the embodiments of the present disclosure are given in part in the following description, will become apparent from the following description, or will be understood by the practice of the embodiments of the present disclosure. [Brief explanation of the drawing]

[0012] The above and / or additional aspects and advantages of the embodiments of this disclosure will be evident and readily apparent from the description of the embodiments with reference to the following drawings. [Figure 1] This is a schematic flowchart of a combined hydrogen and temperature monitoring method for a battery energy storage power plant provided by the embodiments of this disclosure. [Figure 2] This is a schematic diagram of the optical fiber arrangement provided by the embodiments of this disclosure. [Figure 3] This is a schematic diagram of another optical fiber arrangement provided by the embodiments of the present disclosure. [Figure 4] This is a schematic diagram of another optical fiber arrangement provided by the embodiments of the present disclosure. [Figure 5] This is a schematic flowchart of a combined hydrogen and temperature monitoring method for another battery energy storage power plant provided by an embodiment of the present disclosure. [Figure 6] This is a schematic flowchart of a combined hydrogen and temperature monitoring method for another battery energy storage power plant provided by an embodiment of the present disclosure. [Figure 7]It is a schematic configuration diagram of a hydrogen and temperature composite monitoring device for a battery energy storage power plant provided by an embodiment of the present disclosure.

Embodiments for Carrying Out the Invention

[0013] Embodiments of the present disclosure will be described in detail below, and an example of the embodiment is shown in the drawings. Here, the same or similar reference numerals from beginning to end indicate the same or similar elements or elements having the same or similar functions. Hereinafter, the embodiments described with reference to the accompanying drawings are exemplary and are for explaining the embodiments of the present disclosure, and it should not be understood as limiting the embodiments of the present disclosure.

[0014] In a battery energy storage power plant, usually, sensors based on electrochemistry and electromagnetics are used to monitor hydrogen and temperature. However, this type of sensor has a slow response speed and a short lifespan, so the monitoring cost of hydrogen and temperature is high and the timeliness is poor. In addition, in the monitoring of hydrogen and temperature by a single device, it is only possible to reach the environmental level of hydrogen and temperature monitoring, and there is a possibility that hydrogen generated when the temperature of each battery and the heat generation of the battery run out of control cannot be detected timely and accurately. On the other hand, in an energy storage system having a large number of batteries, when realizing detection at the battery cell level by arranging a single sensor, it is expensive and costly, and communication is difficult.

[0015] In an embodiment of the present disclosure, based on the first optical fiber and the second optical fiber arranged on the surface of the battery in each monitoring unit, the first temperature and the second temperature of at least one monitoring point in each monitoring unit are respectively obtained, and based on the difference between the first temperature and the second temperature corresponding to each monitoring point, the hydrogen concentration of each monitoring point is determined. Thereby, the accuracy and timeliness of hydrogen and temperature are improved.

[0016] Hereinafter, a hydrogen and temperature composite monitoring method for a battery energy storage power plant according to an embodiment of the present disclosure will be described with reference to the drawings.

[0017] Figure 1 is a schematic flowchart of a combined hydrogen and temperature monitoring method for a battery energy storage power plant provided by an embodiment of the present disclosure.

[0018] The combined hydrogen and temperature monitoring method for a battery energy storage power plant according to the embodiments of this disclosure is performed by a combined hydrogen and temperature monitoring device for a battery energy storage power plant (hereinafter abbreviated as the monitoring device) provided by the embodiments of this disclosure, and this device can be configured as a computer device or terminal device to realize combined monitoring of hydrogen and temperature in a battery energy storage power plant and improve the accuracy and real-time of hydrogen and temperature.

[0019] As shown in Figure 1, this combined hydrogen and temperature monitoring method for a battery energy storage power plant includes steps 101 and 102.

[0020] In step 101, a first temperature and a second temperature are obtained at least one monitor point in each monitor unit based on a group of optical fibers arranged on the surface of the battery in each monitor unit, where the group of optical fibers includes at least a first optical fiber for measuring the first temperature of the battery body and a second optical fiber coated with a hydrogen-sensitive material on its surface for measuring the second temperature outside the battery.

[0021] Here, the monitoring unit can be divided into battery clusters, battery modules, and battery cells, and each monitoring unit may include one or more battery clusters, one or more battery modules, or one or more battery cells. This is not limited to the embodiments of the present disclosure.

[0022] The surface of the second optical fiber is coated with a hydrogen-sensitive material such as WO3 / Pt hydrogen-sensitive material. When the battery experiences thermal runaway and releases hydrogen gas, the WO3 / Pt hydrogen-sensitive material reacts with the hydrogen gas and releases heat, causing the temperature of the second optical fiber to rise. Therefore, the hydrogen concentration can be determined based on the measured temperature of the second optical fiber. When using WO3 / Pt as the hydrogen-sensitive material, the degradation of the hydrogen-sensitive material can be suppressed by sputtering WO3, which has properties similar to SiO2, as a base layer on the optical fiber surface, simultaneously sputtering WO3 / Pt as a hydrogen-sensitive layer, and finally sputtering 5nm Pt as a protective layer.

[0023] In the embodiments of the present invention, the optical fiber is several tens of kilometers long and can be bent arbitrarily. Therefore, by winding the optical fiber around the surface of the battery in each monitoring unit, points at predetermined intervals along the optical fiber can be designated as monitoring points, thereby enabling monitoring of hydrogen and temperature in a large-scale battery energy storage power plant at the battery cluster level, module level, or battery cell level, and improving the reliability of monitoring the battery energy storage power plant.

[0024] In embodiments of this disclosure, the emission of light from a light source corresponding to an optical fiber can be controlled, and a first temperature at each monitor point can be determined based on any optical principle relating to temperature measurement while light is being transmitted through the first optical fiber. Similarly, a second temperature at each monitor point can be determined based on any optical principle relating to temperature measurement while light is being transmitted through the second optical fiber.

[0025] Furthermore, to improve the reliability of the combined hydrogen and temperature monitor in battery energy storage power plants, the optical fiber can be bent multiple times and placed around the battery in the monitor unit, increasing the number of monitoring points within a single monitor unit and enabling monitoring of temperature and hydrogen concentration at different locations within that unit. As shown in Figure 2, the optical fiber is bent twice and placed around the battery in the monitor unit.

[0026] In some embodiments, as shown in Figure 3, an optical fiber can be bent and wrapped around a single battery cell to enable monitoring of temperature and hydrogen concentration at different locations within a single battery cell, thereby improving the accuracy and reliability of temperature and hydrogen concentration monitoring.

[0027] Because light propagates quickly within optical fibers, it is possible to acquire temperature and hydrogen concentration data at each monitoring point in real time within a predetermined time interval. This is advantageous for improving the immediacy of hydrogen and temperature monitoring in battery energy storage power plants.

[0028] In step 102, the hydrogen concentration at each monitoring point is determined based on the difference between the first temperature and the second temperature corresponding to each monitoring point.

[0029] In the embodiments of this disclosure, the difference between the first and second temperatures corresponding to each monitor point is the temperature difference generated by the reaction between hydrogen and the hydrogen-sensitive material on the surface of the second optical fiber. The temperature increment of the second optical fiber at different hydrogen concentrations can be pre-tested and fitted to establish a correlation function between hydrogen concentration and temperature increment. Subsequently, the hydrogen concentration at each monitor point can be determined based on the difference between the first and second temperatures corresponding to each monitor point and the correlation function.

[0030] In some embodiments, the temperature and hydrogen concentration of a single battery prefab can be monitored by using a group of sufficiently long optical fibers. As shown in Figure 4, a battery prefab contains multiple battery clusters 2, each containing multiple battery modules, arranged regularly, and each battery module may contain multiple battery cells. Groups 1 of optical fibers for monitoring temperature and hydrogen are arranged in a ring shape around each battery cluster, with each battery cluster performing temperature and hydrogen concentration monitoring as an independent unit. The sensor optical fibers pass through a firebox 3 and are finally collected in a monitoring device 4. This makes it possible to monitor the temperature and hydrogen release of batteries within a single battery prefab simply by employing groups of optical fibers. Thus, the monitoring device can be configured with multiple interfaces, to which groups of optical fibers are connected, and the optical fibers of each group are configured to monitor one battery prefab. In this way, distributed temperature and hydrogen concentration monitoring of multiple battery prefabs is realized, increasing the efficiency of combined hydrogen and temperature monitoring in battery energy storage power plants and reducing the complexity of the monitoring device arrangement.

[0031] In the embodiments of this disclosure, a first temperature and a second temperature are obtained for at least one monitor point in each monitor unit based on a group of optical fibers arranged on the battery surface within each monitor unit, and the hydrogen concentration at each monitor point is determined based on the difference between the first temperature and the second temperature corresponding to each monitor point. This enables fine-grained monitoring of temperature and hydrogen concentration in battery energy storage power plants, improving the accuracy and immediacy of temperature and hydrogen, and reducing the cost and implementation difficulty of monitoring temperature and hydrogen in large-scale battery energy storage power plants.

[0032] Figure 5 is a schematic flowchart of a combined hydrogen and temperature monitoring method for a battery energy storage power plant provided by an embodiment of the present disclosure.

[0033] As shown in Figure 5, this combined hydrogen and temperature monitoring method for a battery energy storage power plant includes steps 501 to 504.

[0034] Step 501: Control the laser corresponding to the first optical fiber at a predetermined time interval to emit laser light.

[0035] In embodiments of this disclosure, the monitoring device may include a single laser. By controlling the laser to emit laser light at predetermined time intervals, the monitoring device can achieve real-time monitoring of hydrogen and temperature in a battery energy storage power plant.

[0036] In step 502, the target backscattered light corresponding to each monitor point of the first and second optical fibers is determined based on the time difference between the reception time of the reference backscattered light and the emission time of the laser light, where the reference backscattered light is the backscattered light generated by the laser light at each position in the first and second optical fibers.

[0037] In the embodiments of this disclosure, as laser light propagates through an optical fiber, Raman scattering occurs at all points in the optical fiber, generating backscattered light. Due to the time required for optical transmission, the length of the return time of the backscattered light varies depending on the location. Therefore, based on the time difference between the reception time of each reference backscattered light in the first optical fiber and the emission time of the laser light, and the propagation speed of the laser light in the first optical fiber, the location where Raman scattering corresponding to each reference backscattered light occurs in the first optical fiber can be determined. Then, by matching the location of each monitor point with the location where Raman scattering corresponding to each reference backscattered light occurs in the first optical fiber, the target backscattered light corresponding to each monitor point in the first optical fiber can be determined. Similarly, the target backscattered light corresponding to each monitor point in the second optical fiber can be determined. Here, the reference backscattered light can be detected and determined by a wavelength multiplexer in the monitoring device.

[0038] In step 503, the first and second temperatures of each monitor point are determined based on the intensities of Stokes light and anti-Stokes light in the target backscatter light corresponding to each monitor point of the first and second optical fibers, respectively.

[0039] In the embodiments of this disclosure, the intensity of Stokes light and anti-Stokes light in the backscattered light of each target can be determined by a photodetector in the monitoring device. Then, based on the intensity of Stokes light and anti-Stokes light corresponding to each monitoring point in the first optical fiber, the first temperature of each monitoring point is calculated. Based on the intensity of Stokes light and anti-Stokes light corresponding to each monitoring point in the second optical fiber, the second temperature of each monitoring point is calculated.

[0040] In some embodiments, the scattering position corresponding to each reference backscattered light can be determined based on the time difference between the reception time and the emission time of the laser light in the first optical fiber. Then, the first temperature of the scattering position corresponding to each reference backscattered light in the first optical fiber can be determined based on the intensity of the Stokes light and the anti-Stokes light in each reference backscattered light, respectively. Subsequently, the average value of the first temperature of each scattering position in the monitoring section corresponding to each monitor point is determined as the first temperature of each monitor point. Similarly, the scattering position corresponding to each reference backscattered light and the second temperature corresponding to each scattering position can be determined in the second optical fiber, and the average value of the second temperature of each scattering position in the monitoring section corresponding to each monitor point can be determined as the second temperature of each monitor point. This improves the accuracy of determining the first and second temperatures, and thus improves the accuracy of monitoring hydrogen and temperature in a battery energy storage power plant.

[0041] In step 504, the hydrogen concentration at each monitoring point is determined based on the difference between the first temperature and the second temperature corresponding to each monitoring point.

[0042] In the embodiments of this disclosure, the detailed implementation process of step 504 can be found in the detailed description of any of the embodiments of this disclosure, but is omitted here.

[0043] In the embodiments of this disclosure, a laser corresponding to a first optical fiber is controlled at a preset time interval to emit laser light. Based on the time difference between the reception time of a reference backscattered light and the emission time of the laser light, the target backscattered light corresponding to each monitor point of the first and second optical fibers is determined. Based on the intensities of the Stokes light and anti-Stokes light in the target backscattered light corresponding to each monitor point of the first and second optical fibers, the first and second temperatures of each monitor point are determined, respectively. Subsequently, the hydrogen concentration of each monitor point can be determined based on the difference between the first and second temperatures corresponding to each monitor point. This enables fine-grained monitoring of temperature and hydrogen concentration in battery energy storage power plants, improving the accuracy and immediacy of temperature and hydrogen, and reducing the cost and difficulty of implementing temperature and hydrogen monitoring in large-scale battery energy storage power plants.

[0044] Figure 6 is a schematic flowchart of a combined hydrogen and temperature monitoring method for a battery energy storage power plant provided by an embodiment of the present disclosure.

[0045] As shown in Figure 6, this combined hydrogen and temperature monitoring method for a battery energy storage power plant includes steps 601 to 604.

[0046] In step 601, a first temperature and a second temperature are obtained at least one monitor point in each monitor unit based on a group of optical fibers arranged on the surface of the battery in each monitor unit, where the group of optical fibers includes at least a first optical fiber for measuring the first temperature of the battery body and a second optical fiber coated with a hydrogen-sensitive material on its surface for measuring the second temperature outside the battery.

[0047] In step 602, the hydrogen concentration at each monitoring point is determined based on the difference between the first temperature and the second temperature corresponding to each monitoring point.

[0048] In the embodiments of this disclosure, the detailed implementation process of steps 601 to 602 can be found in the detailed description of any of the embodiments of this disclosure, but such a description is omitted here.

[0049] In step 603, the first temperature and hydrogen concentration corresponding to each monitoring point are stored in the system.

[0050] In the embodiments of this disclosure, the traceability of the first temperature and hydrogen concentration at each monitoring point can be facilitated by storing the first temperature and hydrogen concentration corresponding to each monitoring point in the system.

[0051] In some embodiments, the monitoring device can also transmit the first temperature and hydrogen concentration corresponding to each monitoring point in real time to a combined hydrogen and temperature monitoring system of the corresponding battery energy storage power plant. This monitoring system can visually represent the first temperature and hydrogen concentration corresponding to each monitoring point.

[0052] In step 604, if the first temperature corresponding to any monitor point is greater than the first threshold, and / or the hydrogen concentration corresponding to any monitor point is greater than the second threshold, anomaly notification information is generated based on the location of any of the monitor points.

[0053] In embodiments of this disclosure, a first temperature greater than a first threshold indicates that the first temperature is too high and there is a high probability that the battery will experience thermal runaway. A hydrogen concentration greater than a second threshold indicates that the battery may have experienced thermal runaway. Therefore, if the first temperature corresponding to any monitoring point is greater than the first threshold, and / or the hydrogen concentration corresponding to any monitoring point is greater than the second threshold, anomaly notification information including the location of this monitoring point can be generated, allowing safety personnel to quickly identify batteries at risk of thermal runaway and take timely countermeasures to address the risk. In some embodiments, a monitoring model may be trained to predict the first temperature and hydrogen concentration for the next period at each monitoring point based on the first temperature and hydrogen concentration monitored in the historical period corresponding to each monitoring point. Based on this model and the corresponding first temperature and hydrogen concentration at the current time at each monitoring point, the predicted temperature and predicted hydrogen concentration for the next time at each monitoring point can be determined. This enables early warning of battery thermal runaway.

[0054] In some embodiments, after a safety officer determines whether or not thermal runaway has occurred at a monitoring point indicated by the anomaly notification information, they can trigger a confirmation button corresponding to the anomaly notification information via the display screen of the monitoring device. The monitoring device then receives the confirmation message for the anomaly notification information, activates an anomaly processing program, and immediately handles the risk of battery thermal runaway, thereby reducing losses due to battery thermal runaway.

[0055] In some embodiments, excessively long battery usage can alter battery characteristics. For example, prolonged battery use can degrade the battery, potentially lowering the temperature at which thermal runaway occurs. Therefore, the first threshold can be updated by the maximum value of the first temperature within a predetermined time period, assuming no abnormalities at each monitoring point. This improves the reliability of the combined hydrogen and temperature monitoring in battery energy storage power plants.

[0056] In the embodiments of this disclosure, a first temperature and a second temperature are obtained for at least one monitor point in each monitor unit based on a group of optical fibers arranged on the battery surface within each monitor unit. The hydrogen concentration at each monitor point is then determined based on the difference between the first temperature and the second temperature corresponding to each monitor point. The first temperature and hydrogen concentration corresponding to each monitor point are then stored in the system in chronological order. If the first temperature corresponding to any monitor point is greater than a first threshold, and / or the hydrogen concentration corresponding to any monitor point is greater than a second threshold, an anomaly notification is generated based on the location of any of the monitor points. This improves the accuracy and immediacy of temperature and hydrogen data, as well as the reliability of the combined hydrogen and temperature monitoring in a battery energy storage power plant.

[0057] To realize the above embodiments, the embodiments of this disclosure further provide a combined hydrogen and temperature monitoring device for a battery energy storage power plant. Figure 7 is a schematic diagram of the combined hydrogen and temperature monitoring device for a battery energy storage power plant provided by the embodiments of this disclosure.

[0058] As shown in Figure 7, the combined hydrogen and temperature monitoring device 700 of this battery energy storage power plant includes an acquisition module 710 and a determination module 720.

[0059] The acquisition module 710 acquires a first temperature and a second temperature at at least one monitor point in each monitor unit based on a group of optical fibers arranged on the surface of the battery in each monitor unit, wherein the group of optical fibers includes at least a first optical fiber for measuring the first temperature of the battery body and a second optical fiber coated with a hydrogen-sensitive material on its surface for measuring the second temperature outside the battery.

[0060] The determination module 720 determines the hydrogen concentration at each monitoring point based on the difference between the first temperature and the second temperature corresponding to each monitoring point.

[0061] In one possible embodiment of the embodiments of this disclosure, the acquisition module 710 is: The lasers corresponding to the group of optical fibers are controlled at predetermined time intervals to emit laser light. Based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light, the target backscattered light corresponding to each monitor point of the first and second optical fibers is determined, where the reference backscattered light is the backscattered light generated by the laser light at each position in the first and second optical fibers. The first and second temperatures for each monitor point are determined based on the intensities of Stokes light and anti-Stokes light in the target backscatter light corresponding to each monitor point of the first and second optical fibers, respectively.

[0062] One possible implementation of the embodiments of this disclosure further includes an error handling module, The above error handling module is: The system stores the first temperature and hydrogen concentration corresponding to each monitoring point. If the first temperature corresponding to any monitoring point is greater than the first threshold, and / or the hydrogen concentration corresponding to any monitoring point is greater than the second threshold, anomaly notification information is generated based on the location of any of the monitoring points.

[0063] In one possible implementation of the embodiments of this disclosure, the error handling module further: Upon receiving confirmation information regarding an anomaly, the anomaly handling program is launched.

[0064] In one possible embodiment of the embodiments of this disclosure, It further includes an update module for updating the first threshold using the maximum value of the first temperature when no abnormalities are detected at each monitoring point within a predetermined time period.

[0065] Furthermore, the description of the embodiment of the combined hydrogen and temperature monitoring method for the battery energy storage power plant described above is also applicable to the combined hydrogen and temperature monitoring device, electronic devices, computer-readable storage medium, computer program product, and computer program of the battery energy storage power plant in this embodiment, so the description is omitted here.

[0066] In the embodiments of this disclosure, a first temperature and a second temperature are obtained for at least one monitor point in each monitor unit based on a group of optical fibers arranged on the battery surface within each monitor unit, and the hydrogen concentration at each monitor point is determined based on the difference between the first temperature and the second temperature corresponding to each monitor point. This enables fine-grained monitoring of temperature and hydrogen concentration in battery energy storage power plants, improving the accuracy and immediacy of temperature and hydrogen, and reducing the cost and implementation difficulty of monitoring temperature and hydrogen in large-scale battery energy storage power plants.

[0067] To realize the above embodiments, the embodiments of this disclosure further propose a computer device comprising a processor and memory, Here, the processor reads executable program code stored in memory and executes the program corresponding to the executable program code, thereby realizing the combined hydrogen and temperature monitoring method for the battery energy storage power plant described in the above embodiment.

[0068] To realize the above embodiment, the embodiments of this disclosure further propose a computer-readable storage medium on which a computer program is stored, and when this program is executed by a processor, the combined hydrogen and temperature monitoring method of the battery energy storage power plant described in the above embodiment is realized.

[0069] To realize the above embodiment, the embodiments of this disclosure further propose a computer program product in which a computer program is stored, and when the computer program is executed by a processor, the combined hydrogen and temperature monitoring method of a battery energy storage power plant described in the above embodiment is realized.

[0070] To realize the above embodiment, the embodiment of this disclosure further proposes a computer program including computer program code, which, when executed by a computer, causes the computer to perform the combined hydrogen and temperature monitoring method of a battery energy storage power plant described in the above embodiment.

[0071] Although embodiments of the present disclosure have been shown and described above, these embodiments are illustrative and should not be understood as limitations of the present disclosure. Those skilled in the art can modify, alter, substitute, and transform the above embodiments within the scope of the present disclosure.

[0072] All embodiments of this disclosure may be performed independently or in combination with other embodiments, and all such embodiments are considered to be within the scope of this disclosure.

Claims

1. A combined monitoring method for hydrogen and temperature in a battery energy storage power plant, A step of obtaining a first temperature and a second temperature at at least one monitor point in each monitor unit based on a group of optical fibers arranged on the surface of the battery in each monitor unit, wherein the group of optical fibers includes at least a first optical fiber for measuring the first temperature of the battery body and a second optical fiber coated with a hydrogen-sensitive material on its surface for measuring the second temperature outside the battery. A step of determining the hydrogen concentration at each of the monitor points based on the difference between the first temperature and the second temperature corresponding to each of the monitor points, comprising: testing the temperature increment of the second optical fiber at different hydrogen concentrations in advance; fitting the temperature increment of the second optical fiber at the different hydrogen concentrations to establish a correlation function between hydrogen concentration and temperature increment; and determining the hydrogen concentration at each of the monitor points based on the difference between the first temperature and the second temperature corresponding to each of the monitor points and the correlation function, The step of obtaining the first and second temperatures of at least one monitor point in each monitor unit based on a group of optical fibers arranged on the battery surface within each monitor unit is: The steps include controlling a laser corresponding to the group of optical fibers to emit laser light at a predetermined time interval, A step of determining target backscattered light corresponding to each of the monitor points in the first optical fiber and the second optical fiber, based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light, wherein the reference backscattered light is backscattered light generated at each position of the laser light in the first optical fiber and the second optical fiber, The process includes the step of determining the first and second temperatures of each monitor point based on the intensities of Stokes light and anti-Stokes light in the target backscattered light corresponding to each of the monitor points of the first and second optical fibers, respectively. Determining the target backscattered light corresponding to each of the monitor points in the first optical fiber based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light is as follows: The method includes determining the location where Raman scattering corresponding to each of the reference backscattered rays in the first optical fiber occurs based on the time difference between the reception time and the emission time of the laser light in the first optical fiber and the propagation speed of the laser light in the first optical fiber, matching the location of each monitor point with the location where Raman scattering corresponding to each of the reference backscattered rays in the first optical fiber occurs, and determining the corresponding target backscattered rays in the first optical fiber for each monitor point. Determining the first temperature of each monitor point based on the intensities of Stokes light and anti-Stokes light in the target backscatter light corresponding to each of the monitor points of the first optical fiber and the second optical fiber is: The method includes determining the scattering position corresponding to each of the reference backscattered light based on the time difference between the reception time of each of the reference backscattered light in the first optical fiber and the emission time of the laser light, determining the first temperature of the scattering position corresponding to each of the reference backscattered light in the first optical fiber based on the intensity of the Stokes light and the anti-Stokes light in each of the reference backscattered light, and determining the average value of the first temperatures of each scattering position in the monitoring section corresponding to each of the monitoring points as the first temperature of each of the monitoring points. A combined monitoring method for hydrogen and temperature in a battery energy storage power plant, characterized by the following features.

2. A step of storing the first temperature and the hydrogen concentration corresponding to each of the monitoring points in the system, The method further includes the step of generating anomaly notification information based on the location of any of the monitor points if the first temperature corresponding to any of the monitor points is greater than a first threshold, and / or if the hydrogen concentration corresponding to any of the monitor points is greater than a second threshold. A combined monitoring method for hydrogen and temperature in a battery energy storage power plant according to feature 1.

3. If confirmation information regarding the aforementioned anomaly notification is received, the further step includes starting an anomaly handling program. The combined monitoring method for hydrogen and temperature in a battery energy storage power plant according to feature 2.

4. The step further includes updating the first threshold using the maximum value of the first temperature when there are no abnormalities at each of the monitoring points within a predetermined time period. The combined monitoring method for hydrogen and temperature in a battery energy storage power plant according to feature 2.

5. A combined hydrogen and temperature monitoring device for a battery energy storage power plant, An acquisition module for acquiring a first temperature and a second temperature at at least one monitor point in each monitor unit, based on a group of optical fibers arranged on the surface of the battery within each monitor unit, wherein the group of optical fibers includes at least a first optical fiber for measuring the first temperature of the battery body and a second optical fiber having a hydrogen-sensitive material coated on its surface for measuring the second temperature outside the battery. A determination module for determining the hydrogen concentration at each of the monitor points based on the difference between the first temperature and the second temperature corresponding to each of the monitor points, comprising: pre-testing the temperature increment of the second optical fiber at different hydrogen concentrations; fitting the temperature increment of the second optical fiber at the different hydrogen concentrations to establish a correlation function between hydrogen concentration and temperature increment; and determining the hydrogen concentration at each of the monitor points based on the difference between the first temperature and the second temperature corresponding to each of the monitor points and the correlation function, The acquisition module, The lasers corresponding to the group of optical fibers are controlled at predetermined time intervals to emit laser light. Based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light, the target backscattered light corresponding to each of the monitor points in the first optical fiber and the second optical fiber is determined, and the reference backscattered light is the backscattered light generated by the laser light at each position in the first optical fiber and the second optical fiber. Based on the intensities of Stokes light and anti-Stokes light in the target backscatter light corresponding to each of the monitor points of the first optical fiber and the second optical fiber, the first and second temperatures of each monitor point are determined. Determining the target backscattered light corresponding to each of the monitor points in the first optical fiber based on the time difference between the reception time of each reference backscattered light and the emission time of the laser light is as follows: The method includes determining the location where Raman scattering corresponding to each of the reference backscattered rays in the first optical fiber occurs based on the time difference between the reception time and the emission time of the laser light in the first optical fiber and the propagation speed of the laser light in the first optical fiber, matching the location of each monitor point with the location where Raman scattering corresponding to each of the reference backscattered rays in the first optical fiber occurs, and determining the corresponding target backscattered rays in the first optical fiber for each monitor point. Determining the first temperature of each monitor point based on the intensities of Stokes light and anti-Stokes light in the target backscatter light corresponding to each of the monitor points of the first optical fiber and the second optical fiber is: The method includes determining the scattering position corresponding to each of the reference backscattered light based on the time difference between the reception time of each of the reference backscattered light in the first optical fiber and the emission time of the laser light, determining the first temperature of the scattering position corresponding to each of the reference backscattered light in the first optical fiber based on the intensity of the Stokes light and the anti-Stokes light in each of the reference backscattered light, and determining the average value of the first temperatures of each scattering position in the monitoring section corresponding to each of the monitoring points as the first temperature of each of the monitoring points. A combined hydrogen and temperature monitoring device for a battery energy storage power plant, characterized by the following features.

6. It further includes an error handling module, The aforementioned error handling module, The system stores the first temperature and the hydrogen concentration corresponding to each of the aforementioned monitoring points. If the first temperature corresponding to any of the monitoring points is greater than the first threshold, and / or the hydrogen concentration corresponding to any of the monitoring points is greater than the second threshold, anomaly notification information is generated based on the location of any of the monitoring points. A combined hydrogen and temperature monitoring device for a battery energy storage power plant according to feature 5.

7. A computer device, Including the processor and memory, The processor realizes the method according to any one of claims 1 to 4 by reading executable program code stored in the memory and executing a program corresponding to the executable program code. A computer device characterized by the following features.

8. A computer-readable storage medium on which computer programs are stored, When the program is executed by a processor, the method according to any one of claims 1 to 4 is realized. A computer-readable storage medium characterized by the following features.

9. A computer program including computer program code, wherein when the computer program code is executed on a computer, the computer is instructed to perform the method according to any one of claims 1 to 4. A computer program characterized by the following features.

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