A hydrogen leakage detection system for a solid state hydrogen storage device

Abstract

The embodiment of the present application provides a hydrogen leakage detection system for a solid hydrogen storage device, which comprises: a sampling unit, the sampling unit is used for being communicated with a water cooling pipeline of the solid hydrogen storage device; a degassing unit, the degassing unit is provided with a water-gas separation module, an inlet of the water-gas separation module is communicated with the sampling unit; a thermal conductivity detection unit, the thermal conductivity detection unit is provided with a thermal conductivity cell and a detector, a measuring arm end of the thermal conductivity cell is communicated with a gas outlet of the water-gas separation module, a reference arm end of the thermal conductivity cell is communicated with a hydrogen source, and the detector is used for detecting a hydrogen concentration of hydrogen separated by the degassing unit. The hydrogen leakage detection system improves the technical problem that the hydrogen leakage detection method in the prior art has high requirements for personnel and equipment and poor timeliness.

Description

Technical Field

[0001] This application relates to the technical field of hydrogen energy safety monitoring, and more specifically, to a hydrogen leakage detection system for solid-state hydrogen storage devices. Background Technology

[0002] With the adjustment of the global energy structure and the increasing awareness of environmental protection, hydrogen energy, as a clean and efficient energy carrier, is being used more and more widely, especially in the fields of new energy vehicles and hydrogen power plants. Solid-state hydrogen storage technology, especially the method of storing hydrogen using metal hydrides, has become one of the current research and development hotspots due to its advantages such as high volumetric hydrogen storage density, low storage pressure, and long storage time. However, the safety monitoring technology of solid-state hydrogen storage devices, especially the real-time monitoring technology for internal hydrogen leakage, still faces challenges.

[0003] Existing hydrogen leak detection technologies often require complex equipment and specialized operators. They rely on the analysis of previous hydrogen absorption and release (PCT) curves and a comprehensive assessment of current cooling system temperature and pressure data to infer the extent of hydrogen leaks. This approach is not only difficult to implement but also lacks timeliness, making it hard to respond quickly when safety issues arise.

[0004] There is currently no effective solution to the technical problems of existing hydrogen leak detection methods, which require highly skilled personnel and have poor timeliness. Utility Model Content

[0005] This application provides a hydrogen leakage detection system for solid-state hydrogen storage devices, aiming to improve the technical problems of existing hydrogen leakage detection methods that have high requirements for personnel and equipment and poor timeliness.

[0006] According to one aspect of the embodiments of this application, a hydrogen leakage detection system for a solid-state hydrogen storage device is provided, comprising: a sampling unit for communication with a water-cooling pipeline of the solid-state hydrogen storage device; a degassing unit, the degassing unit having a water-gas separation module, the inlet of the water-gas separation module being connected to the sampling unit; and a thermal conductivity detection unit, the thermal conductivity detection unit having a thermal conductivity cell and a detector, the measuring arm of the thermal conductivity cell being connected to the outlet of the water-gas separation module, the reference arm of the thermal conductivity cell being connected to a hydrogen source, and the detector being used to detect the hydrogen concentration of the hydrogen separated by the degassing unit.

[0007] The embodiments of this application achieve the following technical effects: the sampling unit is connected to the water-cooling pipeline of the solid-state hydrogen storage device, enabling real-time acquisition of water samples from the cooling system. The water-gas separation module separates the hydrogen gas that leaks into the cooling water in real time and introduces the separated hydrogen gas into the measuring arm of the thermal conductivity pool. The detector provides real-time feedback on the hydrogen concentration of the separated hydrogen gas, significantly shortening the time window from hydrogen leakage to detection and improving the timeliness of the detection system. In addition, the sampling, separation, and detection processes are all automated, simplifying equipment configuration, reducing human intervention, and lowering the professional skill requirements for operators.

[0008] Furthermore, the detection system also includes: a sensor unit for detecting the water temperature and pressure of the water-cooled pipeline of the solid hydrogen storage device; and a central processing unit, which includes a correction module electrically connected to the thermal conductivity detection unit and the sensor unit, and is used to correct the hydrogen concentration.

[0009] The embodiments of this application achieve the following technical effects: the solubility of hydrogen in water is affected by temperature and pressure. The solubility of hydrogen increases with increasing pressure and decreases with increasing temperature. The correction module calculates the amount of hydrogen dissolved in the cooling water based on the water temperature and pressure, and then corrects the measured hydrogen concentration, thereby ensuring the accuracy and reliability of the detection results.

[0010] Furthermore, the central processing unit also includes: a comparison module, which is electrically connected to the correction module, and is used to compare the corrected hydrogen concentration with the preset alarm concentration information; and an early warning module, which is electrically connected to the comparison module, and is used to output early warning prompts.

[0011] The embodiments of this application achieve the following technical effects: once the comparison module detects that the corrected hydrogen concentration exceeds the preset alarm concentration, the early warning module will immediately output an early warning prompt, further improving the timeliness of the detection system. In addition, the setup of the comparison module and the early warning module enables full automation of the entire process from data acquisition and processing to early warning output. This not only reduces the need for manual intervention but also avoids false alarms or missed alarms caused by human judgment errors, improving the stability and efficiency of the entire system.

[0012] Furthermore, the sampling unit includes: a first pipeline, the first end of which is connected to the water cooling pipeline of the solid hydrogen storage device, and the second end of which is connected to the inlet of the water-gas separation module; and a second pipeline, the first end of which is connected to the outlet of the water-gas separation module, and the second end of which is connected to the water cooling pipeline of the solid hydrogen storage device.

[0013] The embodiments of this application achieve the following technical effects: the first pipeline, the second pipeline, the water-gas separation module, and the water-cooling pipeline of the solid hydrogen storage device together form a water circulation path. That is, after the water sample is processed by the water-gas separation module, it returns to the water-cooling system, which can minimize the loss of water sample during sampling, processing and return, and eliminate the need to replenish water to the water-cooling system, thereby maintaining the stable operation of the water-cooling system of the solid hydrogen storage device.

[0014] Furthermore, both the first and second pipelines are equipped with check valves so that the cooling water in the first pipeline flows sequentially through the water-gas separation module and the second pipeline into the water-cooling pipeline of the solid hydrogen storage device.

[0015] The embodiments of this application achieve the following technical effects: the setting of the one-way valve restricts the flow path of the water sample, preventing the water sample in the water-gas separation module from flowing back to the water-cooling pipeline through the first pipeline, that is, preventing the hydrogen gas precipitated in the water sample from redissolving; and preventing the cooling water in the water-cooling pipeline from flowing into the water-gas separation module through the second pipeline, that is, preventing the cooling water from flowing directly into the water-gas separation module from the water-cooling pipeline and interfering with the water-gas separation process.

[0016] Furthermore, a filter is installed on the first pipeline, the inlet of which is connected to the outlet of the water-cooled pipeline of the solid hydrogen storage device, and the outlet of which is connected to the inlet of the first pipeline.

[0017] The embodiments of this application achieve the following technical effects: the filter is used to filter impurities in the water sample to avoid clogging the water-air separation module.

[0018] Furthermore, the degassing unit includes: a sampling pump, the inlet of which is connected to the sampling unit; a venturi tube, the inlet of which is connected to the outlet of the sampling pump; and a gas-liquid separator, the inlet of which is connected to the outlet of the venturi tube, and the outlet of which is connected to the measuring arm end of the thermal conductivity pool.

[0019] The embodiments of this application achieve the following technical effects: the degassing unit extracts water samples from the cooling system through a sampling pump to ensure a uniform and stable water flow and avoid the escape of dissolved gas due to turbulence; by utilizing the fluid dynamics effect of the Venturi tube, a local negative pressure can be generated when the water sample flows through, promoting the efficient release of hydrogen dissolved in the water; the gas-liquid separator utilizes the density difference between gas and liquid, the separated hydrogen maintains its original flow direction and flows out from the gas outlet, while the treated water sample settles downwards due to gravity and flows out from the liquid outlet, thereby achieving water-gas separation.

[0020] Furthermore, the degassing unit also includes a molecular sieve, the inlet of which is connected to the outlet of the gas-liquid separator, and the outlet of which is connected to the measuring arm end of the thermal conductivity tank.

[0021] The embodiments of this application achieve the following technical effects: the setting of molecular sieves dries the hydrogen gas after stripping, so as to avoid affecting the detection results.

[0022] Furthermore, the thermal conductivity detection unit is equipped with a constant temperature chamber. One end of the constant temperature chamber is connected to the air outlet of the water-air separation module, and the other end of the constant temperature chamber is connected to the measuring arm end of the thermal conductivity pool.

[0023] The embodiments of this application achieve the following technical effects: the thermal conductivity of hydrogen changes with temperature, and the setting of the constant temperature chamber keeps the hydrogen entering the thermal conductivity pool at the same temperature, so as to avoid detection errors caused by changes in ambient temperature, thereby improving the accuracy and reliability of hydrogen concentration detection.

[0024] Furthermore, the detection system also includes a flow controller, one end of which is connected to the outlet of the water-gas separation module, and the other end of which is connected to the measuring arm of the thermal conductivity pool.

[0025] The embodiments of this application achieve the following technical effects: the flow controller is set to accurately control the gas flow rate entering the thermal conductivity detection unit, so as to avoid the flow rate being too fast or too slow, which would affect the thermal balance of the thermal conductivity pool and thus lead to detection deviation. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0027] Figure 1 This is a schematic diagram of a hydrogen leakage detection system provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the working principle of a thermal conductivity detection unit provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Sampling unit;

[0031] 11. First pipeline; 12. Second pipeline; 13. Check valve; 14. Filter;

[0032] 20. Degassing unit;

[0033] 21. Sampling pump; 22. Venturi tube; 23. Gas-liquid separator; 24. Molecular sieve;

[0034] 30. Thermal conductivity detection unit;

[0035] 31. Constant temperature chamber; 32. Thermal conductivity cell body; 33. Detector;

[0036] 40. Sensor unit;

[0037] 50. Central Processing Unit;

[0038] 51. Correction module; 52. Comparison module; 53. Early warning module;

[0039] 60. Solid-state hydrogen storage device;

[0040] 61. First shut-off valve; 62. Second shut-off valve; 63. Third shut-off valve; 64. Water temperature controller; 65. Water pump;

[0041] 70. Flow controller. Detailed Implementation

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0046] The solid-state hydrogen storage device 60 mainly consists of a hydrogen storage material (usually a metal hydride) and its container. The hydrogen storage material is stored in a storage tank, which is placed inside a sealed container connected to a water-cooling pipeline, meaning the sealed container is filled with cooling water. During the hydrogen filling process, hydrogen reacts chemically with the storage material to form hydrides; during the hydrogen release process, the hydrides are decomposed by heating or other physical means, releasing hydrogen. In practical applications, the solid-state hydrogen storage device 60 may pose a risk of hydrogen permeating from the inside of the storage material to the outside. This internal leakage may not be easily detected by conventional external hydrogen sensors, especially when hydrogen leaks into the cooling water.

[0047] Combination Figure 1 As shown, according to a specific embodiment of this application, a hydrogen leakage detection system for a solid hydrogen storage device 60 is provided.

[0048] Specifically, the hydrogen leakage detection system includes a sampling unit 10, a degassing unit 20, and a thermal conductivity detection unit 30. The sampling unit 10 is connected to the water-cooling pipeline of the solid-state hydrogen storage device 60. The degassing unit 20 is equipped with a water-gas separation module, the inlet of which is connected to the sampling unit 10. The thermal conductivity detection unit 30 is equipped with a thermal conductivity cell 32 and a detector 33. The measuring arm of the thermal conductivity cell 32 is connected to the outlet of the water-gas separation module, and the reference arm of the thermal conductivity cell 32 is connected to a hydrogen source. The detector 33 is used to detect the hydrogen concentration of the hydrogen separated by the degassing unit 20.

[0049] In the embodiments of this application, the sampling unit 10 is connected to the water-cooling pipeline of the solid-state hydrogen storage device 60, enabling real-time acquisition of water samples from the cooling system. The water-gas separation module separates the hydrogen gas that leaks into the cooling water in real time and introduces the separated hydrogen gas into the measuring arm of the thermal conductivity pool 32. The detector 33 provides real-time feedback on the hydrogen concentration of the separated hydrogen gas, significantly shortening the time window from hydrogen leakage to detection and improving the timeliness of the detection system. In addition, the sampling, separation, and detection processes are all automated, simplifying equipment configuration, reducing human intervention, and lowering the professional skill requirements for operators.

[0050] It should be noted that the thermal conductivity detection unit 30 includes a thermal conductivity pool body 32 and a detector 33. The detector 33 is used to collect voltage signals and convert the voltage signals into hydrogen concentration signals. The voltage signal and the hydrogen concentration are proportional, and the hydrogen concentration can be obtained from the voltage signal.

[0051] Specifically, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the working principle of the thermal conductivity detection unit 30. The resistance of R1 is equal to the resistance of R2, and the resistance of R3 is equal to the resistance of R4. R1 is placed in the reference cell, and R2 is placed in the measurement cell. The reference cell maintains a pure hydrogen environment, while the measurement cell is filled with hydrogen gas separated from the water-gas separation module. Due to the difference in hydrogen concentration between the reference cell and the measurement cell, the resistances of R1 and R2 differ, causing the bridge circuit to become unbalanced. The detector 33 outputs a voltage signal, which is proportional to the hydrogen concentration. The detector 33 converts the voltage signal into a hydrogen concentration signal.

[0052] In one exemplary embodiment of this application, the detection system further includes a sensor unit 40 and a central processing unit 50. The sensor unit 40 is used to detect the water temperature and pressure of the water-cooled pipeline of the solid hydrogen storage device 60, and the central processing unit 50 includes a correction module 51, which is electrically connected to the thermal conductivity detection unit 30 and the sensor unit 40, and is used to correct the hydrogen concentration.

[0053] It should be noted that gas solubility refers to the volume of a gas that dissolves in 1 volume of water at a pressure of 101 kPa and a certain temperature to reach saturation. Gas solubility is affected by factors such as the type of gas, pressure, and temperature.

[0054] In the embodiments of this application, the solubility of hydrogen in water is affected by temperature and pressure. The solubility of hydrogen increases with increasing pressure and decreases with increasing temperature. The correction module 51 calculates the amount of hydrogen dissolved in the cooling water based on the water temperature and pressure, and then corrects the measured hydrogen concentration to ensure the accuracy and reliability of the detection results.

[0055] Specifically, sensor unit 40 includes a temperature sensor and a pressure sensor. The temperature sensor is used to detect the water temperature of the cooling water, and the pressure sensor is used to detect the water pressure of the cooling water. Correction module 51 is used to receive the water temperature signal, water pressure signal, and measured hydrogen concentration signal, and correct the hydrogen concentration according to a preset compensation algorithm. The dynamic compensation algorithm formula is: C1=C0*【1+0.023(T-293)】*【1-0.12(P / 1000000)】, where C0 refers to the measured hydrogen concentration, C1 is the corrected hydrogen concentration, T (°C) is the water temperature, and P (MPa) is the water pressure.

[0056] In one exemplary embodiment of this application, the central processing unit 50 further includes a comparison module 52 and an early warning module 53. The comparison module 52 is electrically connected to the correction module 51, and is used to compare the corrected hydrogen concentration with preset alarm concentration information. The early warning module 53 is electrically connected to the comparison module 52, and is used to output an early warning prompt.

[0057] In the embodiments of this application, once the comparison module 52 detects that the corrected hydrogen concentration exceeds the preset alarm concentration, the early warning module 53 will immediately output an early warning prompt, further improving the timeliness of the detection system. Furthermore, the setup of the comparison module 52 and the early warning module 53 achieves full automation from data acquisition and processing to early warning output. This not only reduces the need for manual intervention but also avoids false alarms or missed alarms caused by human judgment errors, improving the stability and efficiency of the entire system.

[0058] For example, the warning notification can be an audible and visual alarm or an information push alarm.

[0059] In one exemplary embodiment of this application, the sampling unit 10 includes a first pipeline 11 and a second pipeline 12. A first end of the first pipeline 11 is connected to the water-cooling pipeline of the solid-state hydrogen storage device 60, and a second end of the first pipeline 11 is connected to the inlet of the water-gas separation module. A first end of the second pipeline 12 is connected to the outlet of the water-gas separation module, and a second end of the second pipeline 12 is connected to the water-cooling pipeline of the solid-state hydrogen storage device 60.

[0060] In the embodiments of this application, the first pipeline 11, the second pipeline 12, the water-gas separation module, and the water-cooling pipeline of the solid hydrogen storage device 60 together form a water circulation path. That is, after the water sample is processed by the water-gas separation module, it is returned to the water-cooling system, which can minimize the loss of water sample during sampling, processing and return, and eliminate the need to replenish water to the water-cooling system, thereby maintaining the stable operation of the water-cooling system of the solid hydrogen storage device 60.

[0061] like Figure 1As shown, the gas pipeline of the solid-state hydrogen storage device 60 includes a hydrogen charging pipeline, a hydrogen discharging pipeline, and inlet and outlet gas pipes. The first end of the inlet and outlet gas pipes is connected to the hydrogen storage material tank of the solid-state hydrogen storage device 60, which is housed in the sealed container of the solid-state hydrogen storage device 60. The second end of the inlet and outlet gas pipes is connected to the hydrogen charging pipeline and the hydrogen discharging pipeline, respectively, for charging and discharging hydrogen. A first shut-off valve 61 is provided on the inlet and outlet gas pipes, a second shut-off valve 62 is provided on the hydrogen charging pipeline, and a third shut-off valve 63 is provided on the hydrogen discharging pipeline. The water cooling pipeline of the solid-state hydrogen storage device 60 is connected to the sealed container of the solid-state hydrogen storage device 60 to form a water cooling circuit, thereby cooling the hydrogen storage material tank. A water temperature controller 64 and a water pump 65 are provided on the water cooling pipeline of the solid-state hydrogen storage device 60. The water pump 65 is used to drive the cooling water circulation, and the water temperature controller 64 is used to regulate the water temperature of the cooling water.

[0062] like Figure 1 As shown, the first end of the first pipe 11 is connected to the water cooling pipe of the solid hydrogen storage device 60, and the second end of the first pipe 11 is connected to the inlet of the water-gas separation module, that is, water samples are collected through the first pipe 11. The first end of the second pipe 12 is connected to the outlet of the water-gas separation module, and the second end of the second pipe 12 is connected to the water cooling pipe of the solid hydrogen storage device 60, that is, the treated water sample flows back to the water cooling pipe through the second pipe 12.

[0063] Furthermore, a one-way valve 13 is provided on the first pipeline 11 and the second pipeline 12 so that the cooling water in the first pipeline 11 flows into the water cooling pipeline of the solid hydrogen storage device through the water-gas separation module and the second pipeline 12 in sequence.

[0064] In the embodiments of this application, the one-way valve 13 restricts the flow path of the water sample, preventing the water sample in the water-gas separation module from flowing back to the water-cooling pipeline through the first pipeline 11, thus preventing the hydrogen gas precipitated in the water sample from redissolving; and preventing the cooling water in the water-cooling pipeline from flowing into the water-gas separation module through the second pipeline 12, thus preventing the cooling water from flowing directly into the water-gas separation module from the water-cooling pipeline and interfering with the water-gas separation process.

[0065] like Figure 1 As shown, a one-way valve 13 is provided on the first pipeline 11, which only allows cooling water to flow into the water-air separation module through the first pipeline 11. A one-way valve 13 is provided on the second pipeline 12, which only allows the water sample processed in the water-air separation module to flow into the water-cooling pipeline.

[0066] Furthermore, a filter 14 is provided on the first pipeline 11. The inlet of the filter 14 is connected to the outlet of the water-cooled pipeline of the solid hydrogen storage device, and the outlet of the filter 14 is connected to the inlet of the first pipeline 11.

[0067] In the embodiments of this application, filter 14 is used to filter impurities in the water sample to avoid clogging the water-air separation module.

[0068] In one exemplary embodiment of this application, the degassing unit 20 includes a sampling pump 21, a venturi tube 22, and a gas-liquid separator 23. The inlet of the sampling pump 21 is connected to the sampling unit 10, the inlet of the venturi tube 22 is connected to the outlet of the sampling pump 21, the inlet of the gas-liquid separator 23 is connected to the outlet of the venturi tube 22, and the outlet of the gas-liquid separator 23 is connected to the measuring arm end of the thermal conductivity pool 32.

[0069] In the embodiments of this application, the degassing unit 20 extracts water samples from the cooling system through the sampling pump 21 to ensure a uniform and stable water flow and avoid the escape of dissolved gas due to turbulence; by utilizing the fluid dynamics effect of the venturi tube 22, a local negative pressure can be generated when the water sample flows through, promoting the efficient release of hydrogen dissolved in the water; the gas-liquid separator 23 utilizes the density difference between gas and liquid, the stripped hydrogen maintains its original flow direction and flows out from the gas outlet, while the treated water sample settles downward due to gravity and flows out from the liquid outlet, thereby achieving water-gas separation.

[0070] Furthermore, the degassing unit 20 also includes a molecular sieve 24, the inlet of which is connected to the outlet of the gas-liquid separator 23, and the outlet of which is connected to the measuring arm end of the thermal conductivity pool 32.

[0071] In the embodiments of this application, the molecular sieve 24 is provided to dry the stripped hydrogen gas in order to avoid affecting the detection results.

[0072] In one exemplary embodiment of this application, the thermal conductivity detection unit 30 is provided with a constant temperature cavity 31. One end of the constant temperature cavity 31 is connected to the air outlet of the water-air separation module, and the other end of the constant temperature cavity 31 is connected to the measuring arm end of the thermal conductivity pool body 32.

[0073] In the embodiments of this application, the thermal conductivity of hydrogen changes with temperature. The constant temperature chamber 31 is set so that the hydrogen entering the thermal conductivity pool 32 is kept at the same temperature, so as to avoid detection errors caused by changes in ambient temperature, thereby improving the accuracy and reliability of hydrogen concentration detection.

[0074] like Figure 1 As shown, the thermal conductivity detection unit 30 includes a constant temperature cavity 31, a thermal conductivity cell 32, and a detector 33. The reference cell and the measuring cell of the thermal conductivity cell 32 are both connected to the constant temperature cavity 31, meaning that the gas entering the thermal conductivity cell 32 passes through the constant temperature cavity 31 to keep the gas at the same temperature.

[0075] In one exemplary embodiment of this application, the detection system further includes a flow controller 70, one end of which is connected to the outlet of the water-gas separation module, and the other end of which is connected to the measuring arm end of the thermal conductivity pool 32.

[0076] In the embodiments of this application, the flow controller 70 is configured to precisely control the gas flow rate entering the thermal conductivity detection unit 30, so as to avoid the flow rate being too fast or too slow and affecting the thermal balance of the thermal conductivity pool 32, thereby causing detection deviation.

[0077] like Figure 1 As shown, one end of the flow controller 70 is connected to the outlet of the molecular sieve 24, and the other end of the flow controller 70 is connected to the constant temperature chamber 31.

[0078] In this application, "multiple" refers to two or more.

[0079] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0080] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0081] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0082] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

Claims

1. A hydrogen leakage detection system for a solid-state hydrogen storage device, characterized in that, include: A sampling unit (10) is used to connect to the water-cooling pipeline of the solid hydrogen storage device (60); A degassing unit (20) is provided with a water-gas separation module, the inlet of which is connected to the sampling unit (10); A thermal conductivity detection unit (30) is provided with a thermal conductivity pool (32) and a detector (33). The measuring arm of the thermal conductivity pool (32) is connected to the outlet of the water-gas separation module, and the reference arm of the thermal conductivity pool (32) is connected to a hydrogen source. The detector (33) is used to detect the hydrogen concentration of the hydrogen separated by the degassing unit (20).

2. The hydrogen leakage detection system according to claim 1, characterized in that, The detection system also includes: Sensor unit (40) is used to detect the water temperature and pressure of the water cooling pipeline of the solid hydrogen storage device (60); The central processing unit (50) includes a correction module (51) which is electrically connected to the thermal conductivity detection unit (30) and the sensor unit (40). The correction module (51) is used to correct the hydrogen concentration.

3. The hydrogen leakage detection system according to claim 2, characterized in that, The central processing unit (50) also includes: The comparison module (52) is electrically connected to the correction module (51). The comparison module (52) is used to compare the corrected hydrogen concentration with the preset alarm concentration information. The warning module (53) is electrically connected to the comparison module (52) and is used to output warning prompts.

4. The hydrogen leakage detection system according to any one of claims 1 to 3, characterized in that, The sampling unit (10) includes: The first pipeline (11) has a first end connected to the water cooling pipeline of the solid hydrogen storage device (60), and a second end connected to the inlet of the water-gas separation module. The second pipeline (12) has its first end connected to the outlet of the water-gas separation module and its second end connected to the water cooling pipeline of the solid hydrogen storage device (60).

5. The hydrogen leakage detection system according to claim 4, characterized in that, Both the first pipeline (11) and the second pipeline (12) are equipped with one-way valves (13) so that the cooling water in the first pipeline (11) flows into the water cooling pipeline of the solid hydrogen storage device (60) through the water-gas separation module and the second pipeline (12) in sequence.

6. The hydrogen leakage detection system according to claim 4, characterized in that, A filter (14) is provided on the first pipeline (11). The inlet of the filter (14) is connected to the outlet of the water-cooled pipeline of the solid hydrogen storage device (60), and the outlet of the filter (14) is connected to the inlet of the first pipeline (11).

7. The hydrogen leakage detection system according to any one of claims 1 to 3, characterized in that, The degassing unit (20) includes: A sampling pump (21) is provided, the inlet of which is connected to the sampling unit (10); Venturi tube (22), the inlet of which is connected to the outlet of the sampling pump (21); A gas-liquid separator (23) is provided, the inlet of which is connected to the outlet of the venturi tube (22), and the outlet of which is connected to the measuring arm end of the thermal conductivity pool body (32).

8. The hydrogen leakage detection system according to claim 7, characterized in that, The degassing unit (20) also includes: Molecular sieve (24), the inlet of which is connected to the outlet of the gas-liquid separator (23), and the outlet of which is connected to the measuring arm end of the thermal conductivity pool (32).

9. The hydrogen leakage detection system according to any one of claims 1 to 3, characterized in that, The thermal conductivity detection unit (30) is provided with a constant temperature cavity (31). One end of the constant temperature cavity (31) is connected to the air outlet of the water-gas separation module, and the other end of the constant temperature cavity (31) is connected to the measuring arm end of the thermal conductivity pool body (32).

10. The hydrogen leakage detection system according to any one of claims 1 to 3, characterized in that, The detection system also includes: A flow controller (70) is provided, one end of which is connected to the outlet of the water-gas separation module, and the other end of which is connected to the measuring arm of the thermal conductivity pool (32).

Images