Combined hydrogen and temperature monitoring method and device for battery energy storage power plants

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-citation of related applications> This disclosure claims priority to Chinese Patent Application No. 2023100525884, filed in China on Feb. 2, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of risk control, and in particular to a method and apparatus for combined hydrogen and temperature monitoring of battery energy storage power plants, an electronic device, a computer-readable storage medium, a computer program product, and a computer program. [Background technology]

[0003] Under the "carbon peak-out and carbon neutral" target strategy, lithium-ion batteries have been widely used in energy storage systems due to their many advantages, including high energy density and power density, high energy conversion efficiency, long cycle life, and environmental friendliness. However, as batteries deteriorate, they can experience thermal runaway, causing a rapid rise in temperature, leading to the release of large amounts of hydrogen and potentially resulting in a safety hazard. Therefore, a safe and reliable hydrogen and temperature monitoring method is urgently needed to ensure the safe and stable operation of battery energy storage power plants. Summary of the Invention

[0004] The embodiments of the present disclosure provide a method and apparatus for combined 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. Specific technical solutions are as follows:

[0005] An embodiment of one aspect of the present disclosure provides a method for combined hydrogen and temperature monitoring of a battery energy storage power plant, the method comprising: a step of acquiring a first temperature and a second temperature of 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 having a surface coated with a hydrogen-sensitive material for measuring a second temperature outside the battery; determining a hydrogen concentration at each of the monitor points based on a difference between the first temperature and the second temperature corresponding to each of the monitor points, wherein the temperature increments of the second optical fiber at different hydrogen concentrations are pre-tested, and the temperature increments of the second optical fiber at different hydrogen concentrations are fitted to establish a correlation function between the hydrogen concentration and the 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 acquiring a first temperature and a second temperature at at least one monitor point in each of the monitor units based on a group of optical fibers arranged on a surface of the battery in each of the monitor units includes: controlling lasers corresponding to the group of optical fibers to emit laser light at predetermined time intervals; determining target backscattered light corresponding to each of the monitor points of the first optical fiber and the second optical fiber based on a time difference between a receiving time of each reference backscattered light and an emitting time of the laser light, wherein the reference backscattered light is backscattered light generated by the laser light at each position of the first optical fiber and the second optical fiber; determining the first temperature and the second temperature at each of the monitor points based on the intensities of Stokes light and anti-Stokes light in the target backscattered light corresponding to each of the monitor points in the first optical fiber and the second optical fiber, respectively; Here, determining target backscattered light corresponding to each of the monitor points of the first optical fiber based on the time difference between the light receiving time of each of the reference backscattered light and the light emitting time of the laser light is determining a position in the first optical fiber where Raman scattering corresponding to each of the reference backscattered lights occurs based on a time difference between a reception time of each of the reference backscattered lights in the first optical fiber and a time of emission of the laser light and a propagation speed of the laser light in the first optical fiber; and matching a position of each of the monitor points with a position in the first optical fiber where Raman scattering corresponding to each of the reference backscattered lights occurs to determine a corresponding target backscattered light in the first optical fiber for each of the monitor points; determining the first temperature of each of the monitor points 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, respectively; The method includes determining a scattering position corresponding to each of the reference backscattered lights based on the time difference between the reception time of each of the reference backscattered lights in the first optical fiber and the emission time of the laser light, determining a first temperature at the scattering position corresponding to each of the reference backscattered lights in the first optical fiber based on the intensities of the Stokes light and the anti-Stokes light in each of the reference backscattered lights, respectively, and determining an average value of the first temperatures at each scattering position in a monitor section corresponding to each of the monitor points as the first temperature of each of the monitor points.

[0006] An embodiment of another aspect of the present 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 of 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 having a surface coated with a hydrogen-sensitive material for measuring a second temperature outside the battery; a determination module for determining a hydrogen concentration at each of the monitor points based on a difference between the first temperature and the second temperature corresponding to each of the monitor points, wherein the determination module pre-tests temperature increments of the second optical fiber at different hydrogen concentrations, fits the temperature increments of the second optical fiber at different hydrogen concentrations to establish a correlation function between hydrogen concentration and temperature increment, and 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: controlling the lasers corresponding to the group of optical fibers to emit laser light at predetermined time intervals; determining target backscattered light corresponding to each of the monitor points of the first optical fiber and the second optical fiber based on a time difference between a receiving time of each reference backscattered light and a emitting time of the laser light, wherein the reference backscattered light is backscattered light generated by the laser light at each position of the first optical fiber and the second optical fiber; determining a first temperature and a second temperature at each of the monitor points based on the intensities of the Stokes light and the anti-Stokes light in the target backscattered light corresponding to each of the monitor points in the first optical fiber and the second optical fiber, respectively; Here, determining target backscattered light corresponding to each of the monitor points of the first optical fiber based on the time difference between the light receiving time of each of the reference backscattered light and the light emitting time of the laser light is determining a position in the first optical fiber where Raman scattering corresponding to each reference backscattered light occurs based on a time difference between a reception time of each reference backscattered light in the first optical fiber and a time of emission of the laser light and a propagation speed of the laser light in the first optical fiber; and matching a position of each of the monitor points with a position in the first optical fiber where Raman scattering corresponding to each reference backscattered light occurs to determine a corresponding target backscattered light in the first optical fiber for each of the monitor points; determining the first temperature of each of the monitor points 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, respectively; The method includes determining a scattering position corresponding to each of the reference backscattered lights based on the time difference between the reception time of each of the reference backscattered lights in the first optical fiber and the emission time of the laser light, determining a first temperature at the scattering position corresponding to each of the reference backscattered lights in the first optical fiber based on the intensities of the Stokes light and the anti-Stokes light in each of the reference backscattered lights, respectively, and determining an average value of the first temperatures at each scattering position in a monitor section corresponding to each of the monitor points as the first temperature of each of the monitor points.

[0007] An embodiment of another aspect of the present disclosure provides a computer device, including a processor and a memory; Here, the processor reads the executable program code stored in the memory and executes the program corresponding to the executable program code, thereby realizing the method of the embodiment of the first aspect of the present disclosure.

[0008] An embodiment of another aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, the program being adapted to implement the method of the embodiment of the first aspect of the present disclosure when executed by a processor.

[0009] An embodiment of another aspect of the present disclosure provides a computer program product having stored thereon computer instructions, the computer instructions comprising: a computer program that, when executed by a processor, implements the method of the embodiment of the first aspect of the present disclosure.

[0010] An embodiment of another aspect of the present disclosure provides a computer program comprising computer program code, which when executed on a computer causes the computer to perform the method of the embodiment of the first aspect of the present disclosure.

[0011] Additional aspects and advantages of embodiments of the present disclosure will be set forth in part in the description that follows, and in part will be apparent from the description, or may be learned by practice of embodiments of the present disclosure. [Brief explanation of the drawings]

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

[0013]

[0023] The following detailed description of the embodiments of the present disclosure will be given, and examples of the embodiments are shown in the drawings. Hereinafter, the same or similar reference numerals throughout the drawings indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative and are intended to explain the embodiments of the present disclosure, but cannot be understood as limiting the embodiments of the present disclosure.

[0014] Battery energy storage power plants typically use electrochemical and electrical sensors to monitor hydrogen and temperature. However, these types of sensors have slow response times and short lifespans, resulting in high costs and poor timeliness for hydrogen and temperature monitoring. Furthermore, monitoring hydrogen and temperature using a single device can only reach environmental levels, which may prevent timely and accurate detection of the temperature of each battery and the hydrogen generated when the battery heats up. Meanwhile, in energy storage systems with a large number of batteries, achieving cell-level detection using a single sensor is expensive, costly, and difficult to communicate.

[0015] In an embodiment of the present disclosure, a first temperature and a second temperature at at least one monitor point in each monitor unit are acquired based on a first optical fiber and a second optical fiber arranged on the surface of the battery in each monitor unit, respectively, 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, thereby improving the accuracy and real-timeness of the hydrogen and temperature measurements.

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

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

[0018] The method for combined hydrogen and temperature monitoring of a battery energy storage power plant according to an embodiment of the present disclosure is performed by a combined hydrogen and temperature monitoring device (hereinafter referred to as the monitor device) for a battery energy storage power plant provided by an embodiment of the present disclosure, and this device can be configured as a computer device or a terminal device to realize combined hydrogen and temperature monitoring of a battery energy storage power plant and improve the accuracy and timeliness of hydrogen and temperature.

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

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

[0021] Here, the monitor units can be divided into battery clusters, battery modules, and battery cells, and each monitor unit can include one or more battery clusters, one or more battery modules, or one or more battery cells.

[0022] The surface of the second optical fiber is coated with a hydrogen-sensitive material, such as WO3 / Pt. When the battery experiences thermal runaway and hydrogen gas is released, the WO3 / Pt hydrogen-sensitive material reacts with the hydrogen gas, releasing heat and raising the temperature of the second optical fiber. The hydrogen concentration can be determined based on the measured temperature of the second optical fiber. When WO3 / Pt is used as the hydrogen-sensitive material, WO3, which has SiO2-like properties, is sputtered onto the optical fiber surface as a base layer, followed by simultaneous sputtering of WO3 / Pt as a hydrogen-sensitive layer, and finally, a 5-nm Pt protective layer, thereby preventing degradation of the hydrogen-sensitive material.

[0023] In an embodiment of the present invention, the optical fiber is several tens of kilometers long and can be bent arbitrarily, so that the optical fiber can be wound on the surface of the battery in each monitoring unit, and monitoring points at intervals of a predetermined length of the optical fiber can be used to monitor the hydrogen and temperature of large-scale battery energy storage power plants at the battery cluster level, module level, or battery cell level, thereby improving the reliability of monitoring the battery energy storage power plants.

[0024] In an embodiment of the present disclosure, the light emission of the light source light emitter corresponding to the optical fiber can be controlled to determine a first temperature at each monitor point based on any optical principle related to temperature measurement while light is transmitted through the first optical fiber, and similarly, a second temperature at each monitor point can be determined based on any optical principle related to temperature measurement while light is transmitted through the second optical fiber.

[0025] In addition, to improve the reliability of the combined hydrogen and temperature monitor for battery energy storage power plants, the optical fiber can be bent multiple times 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 a single monitor unit. As shown in Figure 2, the optical fiber is bent twice around the battery in the monitor unit.

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

[0027] Due to the fast propagation speed of light in optical fibers, the temperature and hydrogen concentration at each monitoring point can be obtained in real time within a preset time interval, which is advantageous for increasing the immediacy of hydrogen and temperature monitoring in battery energy storage power plants.

[0028] In step 102, 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.

[0029] In an embodiment of the present disclosure, the difference between the first temperature and the second temperature 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 tested in advance, and a correlation function between the hydrogen concentration and the temperature increment can be established by fitting the temperature increment of the second optical fiber at different hydrogen concentrations. Then, the hydrogen concentration at each monitor point can be determined based on the difference between the first temperature and the second temperature corresponding to each monitor point and the correlation function.

[0030] In some embodiments, a group of optical fibers of sufficient length can be used to monitor the temperature and hydrogen concentration of a single battery prefab. As shown in Figure 4, a battery prefab can have multiple battery clusters 2, each containing multiple battery modules, arranged in a regular pattern. Each battery module can contain multiple battery cells. A group of optical fibers 1 for monitoring temperature and hydrogen is bent into a ring shape and arranged in each battery cluster, allowing each battery cluster to monitor temperature and hydrogen concentration as an independent unit. The sensor optical fibers pass through a fire box 3 and are finally collected in a monitoring device 4. This allows for monitoring the temperature and hydrogen release of batteries within a single battery prefab using only a group of optical fibers. Therefore, the monitoring device can be configured with multiple interfaces, each connected to a group of optical fibers, and each group of optical fibers is configured to monitor one battery prefab. In this way, distributed temperature and hydrogen concentration monitoring of multiple battery prefabs is realized, improving 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 an embodiment of the present disclosure, a first temperature and a second temperature are obtained at at least one monitoring point in each monitoring unit based on a group of optical fibers arranged on the battery surface in each monitoring unit, and 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, thereby realizing fine-grained monitoring of the temperature and hydrogen concentration of battery energy storage power plants, improving the accuracy and timeliness of temperature and hydrogen monitoring, and reducing the cost and difficulty of implementing temperature and hydrogen monitoring for large-scale battery energy storage power plants.

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

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

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

[0035] In an embodiment of the present disclosure, the monitoring device may include a laser, and the monitoring device can control the laser to emit laser light at a preset time interval, thereby realizing real-time monitoring of hydrogen and temperature in the battery energy storage power plant.

[0036] In step 502, target backscattered light corresponding to each monitoring point of the first optical fiber and the second optical fiber is determined based on the time difference between the receiving time of the reference backscattered light and the emitting time of the laser light, 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.

[0037] In an embodiment of the present disclosure, when laser light propagates through an optical fiber, Raman scattering can occur at any location in the optical fiber, generating backscattered light. Because light transmission takes time, the length of the return time of the backscattered light varies depending on the location. Therefore, the location where Raman scattering corresponding to each reference backscattered light occurs in the first optical fiber can be determined 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. 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, target backscattered light corresponding to each monitor point in the first optical fiber can be determined. Similarly, 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 using a wavelength multiplexer in the monitor device.

[0038] In step 503, a first temperature and a second temperature are determined at each monitor point based on the intensities of the Stokes light and the anti-Stokes light in the target backscattered light corresponding to each monitor point of the first optical fiber and the second optical fiber, respectively.

[0039] In an embodiment of the present disclosure, the intensities of the Stokes light and anti-Stokes light in each target backscattered light can be determined by a photodetector in the monitoring device. Then, a first temperature at each monitor point is calculated based on the intensities of the Stokes light and anti-Stokes light corresponding to each monitor point in the first optical fiber. A second temperature at each monitor point is calculated based on the intensities of the Stokes light and anti-Stokes light corresponding to each monitor point in the second optical fiber.

[0040] In some embodiments, a scattering position corresponding to each reference backscattered light can be determined 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. Then, a first temperature at the scattering position corresponding to each reference backscattered light in the first optical fiber can be determined based on the intensities of the Stokes light and the anti-Stokes light in each reference backscattered light, respectively. The average value of the first temperatures at each scattering position in the monitoring section corresponding to each monitor point is then determined as the first temperature of each monitor point. Similarly, a scattering position corresponding to each reference backscattered light in the second optical fiber and a second temperature corresponding to each scattering position can be determined, and the average value of the second temperatures at 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, thereby improving the accuracy of monitoring hydrogen and temperature in battery energy storage power plants.

[0041] In step 504, 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.

[0042] In the embodiment of the present disclosure, the detailed implementation process of the operation of step 504 can refer to any detailed description of the embodiment of the present disclosure, and the description will be omitted here.

[0043] In an embodiment of the present disclosure, a laser corresponding to a first optical fiber is controlled to emit laser light at predetermined time intervals, and then target backscattered light corresponding to each monitoring point of the first optical fiber and the second optical fiber is determined based on the time difference between the reception time of the reference backscattered light and the emission time of the laser light. A first temperature and a second temperature at each monitoring point are determined based on the intensities of the Stokes light and anti-Stokes light in the target backscattered light corresponding to each monitoring point of the first optical fiber and the second optical fiber, respectively. Then, 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. This enables fine-grained monitoring of temperature and hydrogen concentration in battery energy storage power plants, improves the accuracy and timeliness of temperature and hydrogen monitoring, and reduces the cost and difficulty of implementing temperature and hydrogen monitoring in large-scale battery energy storage power plants.

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

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

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

[0047] In step 602, 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.

[0048] In the embodiment of the present disclosure, the detailed implementation process of the operations of steps 601 to 602 can refer to any of the detailed descriptions of the embodiments of the present disclosure, but the description will be omitted here.

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

[0050] In an embodiment of the present disclosure, the first temperature and hydrogen concentration corresponding to each monitor point are stored in the system, thereby facilitating traceability of the first temperature and hydrogen concentration at each monitor point.

[0051] In some embodiments, the monitoring device may also transmit the first temperature and hydrogen concentration corresponding to each monitoring point in real time to a corresponding combined hydrogen and temperature monitoring system of the battery energy storage power plant, which may provide a visual representation of the first temperature and hydrogen concentration corresponding to each monitoring point.

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

[0053] In embodiments of the present disclosure, if the first temperature is greater than a first threshold, it indicates that the first temperature is too high and that the battery is likely to experience thermal runaway. If the hydrogen concentration is greater than a second threshold, it indicates that the battery may have experienced thermal runaway. Therefore, 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 a second threshold, abnormality notification information including the location of the monitor point is generated, allowing safety personnel to quickly identify batteries at risk of thermal runaway and take timely countermeasures to address the thermal runaway risk. In some embodiments, a monitor model may be trained to predict the first temperature and hydrogen concentration for the next period of each monitor point based on the first temperature and hydrogen concentration monitored in the history period corresponding to each monitor point. Then, the predicted temperature and predicted hydrogen concentration for the next time point of each monitor point can be determined based on this model and the corresponding first temperature and hydrogen concentration at the current time point of each monitor point. This allows for early warning of battery thermal runaway.

[0054] In some embodiments, after the safety officer determines whether a thermal runaway has occurred or will occur at the monitoring point indicated by the abnormality indication information, he or she can trigger a confirmation button corresponding to the abnormality indication information through the display screen of the monitoring device, and the monitoring device can receive the confirmation message of the abnormality indication information and launch an abnormality processing program to immediately deal with the risk of battery thermal runaway and reduce losses caused by battery thermal runaway.

[0055] In some embodiments, battery characteristics may change if the battery is used for too long. For example, if the battery is used for a long time and deteriorates, the temperature that causes thermal runaway may decrease. Therefore, the first threshold value may be updated by the maximum value of the first temperature when no abnormality is detected at each monitor point within a predetermined time period. This improves the reliability of the combined hydrogen and temperature monitor for battery energy storage power plants.

[0056] In an embodiment of the present disclosure, a first temperature and a second temperature of at least one monitor point in each monitor unit are obtained based on a group of optical fibers arranged on the battery surface in each monitor unit, and then a 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, respectively. The first temperature and hydrogen concentration corresponding to each monitor point are then stored in the system in chronological order, and if the first temperature corresponding to any monitor point is greater than a first threshold and / or if the hydrogen concentration corresponding to any monitor point is greater than a second threshold, an abnormality notification is generated based on the position of any monitor point. This improves the accuracy and timeliness of temperature and hydrogen monitoring, and also improves the reliability of the combined monitoring of hydrogen and temperature in battery energy storage power plants.

[0057] To realize the above embodiment, the embodiment of the present disclosure further provides 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 embodiment of the present disclosure.

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

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

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

[0061] In one possible implementation of the embodiment of the present disclosure, the acquisition module 710 includes: controlling the lasers corresponding to the groups of optical fibers to emit laser light at predetermined time intervals; determining target backscattered light corresponding to each monitoring point of the first optical fiber and the second optical fiber based on a time difference between the receiving time of each reference backscattered light and the emitting time of the laser light, wherein the reference backscattered light is backscattered light generated by the laser light at each position of the first optical fiber and the second optical fiber; A first temperature and a second temperature at each monitor point are determined based on the intensities of the Stokes light and the anti-Stokes light in the target backscattered light corresponding to each monitor point of the first optical fiber and the second optical fiber, respectively.

[0062] In one possible implementation of the embodiments of the present disclosure, the system further includes an anomaly processing module; The abnormality processing module The first temperature and hydrogen concentration corresponding to each monitor point are stored in the system; When the first temperature corresponding to any of the monitor points is greater than the first threshold value and / or when the hydrogen concentration corresponding to any of the monitor points is greater than the second threshold value, abnormality display information is generated based on the position of any of the monitor points.

[0063] In one possible implementation of the embodiments of the present disclosure, the anomaly processing module further comprises: When the confirmation information of the abnormality presentation information is received, the abnormality processing program is started.

[0064] In one possible implementation of the embodiments of the present disclosure, The system further includes an update module for updating the first threshold value using the maximum value of the first temperature when no abnormality is detected at each monitor point within a preset time period.

[0065] The above description of the embodiment of the method for comprehensively monitoring hydrogen and temperature in a battery energy storage power plant also applies to the device, electronic device, computer-readable storage medium, computer program product, and computer program for comprehensively monitoring hydrogen and temperature in a battery energy storage power plant in this embodiment, and therefore the description will be omitted here.

[0066] In an embodiment of the present disclosure, a first temperature and a second temperature are obtained at at least one monitoring point in each monitoring unit based on a group of optical fibers arranged on the battery surface in each monitoring unit, and 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, thereby realizing fine-grained monitoring of the temperature and hydrogen concentration of battery energy storage power plants, improving the accuracy and timeliness of temperature and hydrogen monitoring, and reducing the cost and difficulty of implementing temperature and hydrogen monitoring for large-scale battery energy storage power plants.

[0067] To realize the above embodiment, an embodiment of the present disclosure further proposes a computer device, including a processor and a memory; Here, the processor reads the executable program code stored in the 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 embodiments, the embodiments of the present disclosure further propose a computer-readable storage medium having a computer program stored therein, which, when executed by a processor, realizes the combined hydrogen and temperature monitoring method for a battery energy storage power plant described in the above embodiments.

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

[0070] To realize the above embodiments, the embodiments of the present disclosure further propose a computer program including computer program code, which, when executed on a computer, causes the computer to execute the combined hydrogen and temperature monitoring method for a battery energy storage power plant described in the above embodiments.

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

[0072] All embodiments of the present disclosure can be implemented alone or in combination with other embodiments, and all of these embodiments are considered to be within the protection scope of the present disclosure.

Claims

1. 1. A method for combined hydrogen and temperature monitoring of a battery energy storage power plant, comprising: a step of 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 in each monitor unit, the group 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 a second temperature outside the battery; determining a hydrogen concentration at each of the monitor points based on a difference between the first temperature and the second temperature corresponding to each of the monitor points, the step of pre-testing temperature increments of the second optical fiber at different hydrogen concentrations, fitting the temperature increments of the second optical fiber at 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 acquiring a first temperature and a second temperature at at least one monitor point in each of the monitor units based on a group of optical fibers arranged on a surface of the battery in each of the monitor units includes: controlling lasers corresponding to the group of optical fibers to emit laser light at predetermined time intervals; determining target backscattered light corresponding to each of the monitor points of the first optical fiber and the second optical fiber based on a time difference between a receiving time of each reference backscattered light and an emitting time of the laser light, wherein the reference backscattered light is backscattered light generated by the laser light at each position of the first optical fiber and the second optical fiber; determining the first temperature and the second temperature at each of the monitor points based on the intensities of Stokes light and anti-Stokes light in the target backscattered light corresponding to each of the monitor points in the first optical fiber and the second optical fiber, respectively; determining a target backscattered light corresponding to each of the monitor points of the first optical fiber based on a time difference between a light receiving time of each of the reference backscattered lights and a light emitting time of the laser light; determining a position in the first optical fiber where Raman scattering corresponding to each of the reference backscattered lights occurs based on a time difference between a reception time of each of the reference backscattered lights in the first optical fiber and a time of emission of the laser light and a propagation speed of the laser light in the first optical fiber; and determining a corresponding target backscattered light in the first optical fiber at each of the monitor points by matching a position of each of the monitor points with a position in the first optical fiber where Raman scattering corresponding to each of the reference backscattered lights occurs, determining the first temperature of each of the monitor points 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, respectively; determining a scattering position corresponding to each of the reference backscattered lights based on the time difference between the reception time of each of the reference backscattered lights in the first optical fiber and the emission time of the laser light; determining a first temperature at the scattering position corresponding to each of the reference backscattered lights in the first optical fiber based on the intensities of the Stokes light and the anti-Stokes light in each of the reference backscattered lights, respectively; and determining an average value of the first temperatures at each scattering position in a monitor section corresponding to each of the monitor points as the first temperature of each of the monitor points. A method for combined monitoring of hydrogen and temperature in a battery energy storage power plant.

2. storing the first temperature and the hydrogen concentration corresponding to each of the monitor points in a system; and generating anomaly display information based on the position of any of the monitor points when the first temperature corresponding to any of the monitor points is greater than a first threshold value and / or when the hydrogen concentration corresponding to any of the monitor points is greater than a second threshold value. The method for combined monitoring of hydrogen and temperature in a battery energy storage power plant as claimed in claim 1.

3. The method further includes a step of starting an abnormality processing program when confirmation information of the abnormality presentation information is received. The method for combined monitoring of hydrogen and temperature in a battery energy storage power plant as claimed in claim 2.

4. and further comprising a step of updating the first threshold value using a maximum value of the first temperature when no abnormality is detected at each of the monitor points within a preset time period. The method for combined monitoring of hydrogen and temperature in a battery energy storage power plant as claimed in claim 2.

5. A combined hydrogen and temperature monitoring device for a battery energy storage power plant, comprising: 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 a surface of the battery in each monitor unit, the group 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 a second temperature outside the battery; a determination module for determining a hydrogen concentration at each of the monitor points based on a difference between the first temperature and the second temperature corresponding to each of the monitor points, the determination module preliminarily testing temperature increments of the second optical fiber at different hydrogen concentrations and fitting the temperature increments of the second optical fiber at the different hydrogen concentrations to establish a correlation function between the hydrogen concentration and the 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: controlling the lasers corresponding to the group of optical fibers to emit laser light at predetermined time intervals; determining target backscattered light corresponding to each of the monitor points of the first optical fiber and the second optical fiber based on a time difference between a light receiving time of each reference backscattered light and a light emitting time of the laser light, the reference backscattered light being backscattered light generated by the laser light at each position of the first optical fiber and the second optical fiber; determining a first temperature and a second temperature at each of the monitor points based on the intensities of the Stokes light and the anti-Stokes light in the target backscattered light corresponding to each of the monitor points in the first optical fiber and the second optical fiber, respectively; determining a target backscattered light corresponding to each of the monitor points of the first optical fiber based on a time difference between a light receiving time of each of the reference backscattered lights and a light emitting time of the laser light; determining a position in the first optical fiber where Raman scattering corresponding to each of the reference backscattered lights occurs based on a time difference between a reception time of each of the reference backscattered lights in the first optical fiber and a time of emission of the laser light and a propagation speed of the laser light in the first optical fiber; and matching a position of each of the monitor points with a position in the first optical fiber where Raman scattering corresponding to each of the reference backscattered lights occurs to determine a corresponding target backscattered light in the first optical fiber for each of the monitor points; determining the first temperature of each of the monitor points 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, respectively; determining a scattering position corresponding to each of the reference backscattered lights based on the time difference between the reception time of each of the reference backscattered lights in the first optical fiber and the emission time of the laser light; determining a first temperature at the scattering position corresponding to each of the reference backscattered lights in the first optical fiber based on the intensities of the Stokes light and the anti-Stokes light in each of the reference backscattered lights, respectively; and determining an average value of the first temperatures at each scattering position in a monitor section corresponding to each of the monitor points as the first temperature of each of the monitor points. A combined hydrogen and temperature monitoring device for a battery energy storage power plant.

6. further comprising an anomaly processing module; The abnormality processing module: storing the first temperature and the hydrogen concentration corresponding to each of the monitor points in the system; When the first temperature corresponding to any of the monitor points is greater than a first threshold value and / or when the hydrogen concentration corresponding to any of the monitor points is greater than a second threshold value, abnormality display information is generated based on the position of any of the monitor points. The combined hydrogen and temperature monitoring device for a battery energy storage power plant as claimed in claim 5.

7. 1. A computing device comprising: a processor and a memory, The processor implements the method according to any one of claims 1 to 4 by reading the executable program code stored in the memory and executing the program corresponding to the executable program code.

1. A computing device comprising:

8. A computer-readable storage medium on which a computer program is 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 comprising:

9. A computer program product comprising a computer program, which when executed by a processor, implements the method according to any one of claims 1 to 4.

1. A computer program product comprising:

10. A computer program comprising computer program code, which when executed on a computer causes the computer to carry out the method according to any one of claims 1 to 4. A computer program characterized by:

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