An air tightness detection apparatus and system

Abstract

The application provides airtightness detection equipment and system, relates to the field of hydrogen production by electrolysis of water, and comprises a control module, two detection channels and a pressure sensor connected with the control module; each detection channel is connected with the pressure sensor and has a common channel section from an input end of the airtightness detection equipment; the output end of one detection channel is connected with a first detection end of an anion exchange membrane electrolytic cell, and the output end of the other detection channel is connected with a second detection end of the anion exchange membrane electrolytic cell; the airtightness detection equipment is connected with a gas source device; the two detection channels can reduce the detection gas provided by the gas source device to different pressure values. The control module controls the corresponding detection channels to be turned off or turned on under different working conditions, so that the anion exchange membrane electrolytic cell is in a sealed state, i.e. enters a pressure maintaining link; at this time, the control module judges whether the airtightness of the anion exchange membrane electrolytic cell is qualified or not by the obtained pressure value, and the airtightness detection process is simplified.

Description

Technical Field

[0001] This application relates to the field of hydrogen production by water electrolysis, and in particular to an airtightness detection device and system. Background Technology

[0002] Hydrogen energy is a secondary energy source that requires specific production processes, such as water electrolysis. Anion exchange membrane (AEM) technology is an emerging green hydrogen production technology. It utilizes AEM electrolyzers to produce hydrogen under mild conditions with non-precious metal catalysts at relatively low cost, thus its widespread application. This has enabled the large-scale production of AEM electrolyzers; therefore, ensuring the product quality of mass-produced AEM electrolyzers has become a pressing issue.

[0003] Among the many quality control steps in AEM electrolyzer production, airtightness testing is crucial. Currently, airtightness testing is often conducted using self-made, simple pressure-holding devices, or custom-developed equipment is used. However, the operation of self-made simple pressure-holding devices is complex, prone to errors, and can even damage the AEM electrolyzer; while custom-developed equipment is expensive. Summary of the Invention

[0004] This application provides an airtightness testing device and system that can automatically test the airtightness of AEM electrolytic cells under different gas pressures, simplifying the airtightness testing process of AEM electrolytic cells and improving the airtightness testing efficiency of AEM electrolytic cells.

[0005] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, an airtightness testing device is provided, comprising: a control module, and a first detection path, a second detection path, and a pressure sensor, each connected to the control module. The first and second detection paths are respectively connected to the pressure sensor. Thus, the control module can obtain the pressure value of either detection path through the pressure sensor. The two detection paths share a common path segment, the starting end of which is the input end of the airtightness testing device, which can be connected to a gas source device. The gas source device can supply a detection gas (such as nitrogen) to the airtightness testing device. The output end of the first detection path can be connected to the first detection end of an AEM electrolyzer, and the output end of the second detection path can be connected to the second detection end of the AEM electrolyzer. It should be understood that the first and second detection ends of the AEM electrolyzer are different ports. Based on this connection structure, the gas source device can supply detection gas to the AEM electrolyzer through either the first or second detection path of the airtightness testing device. Furthermore, The gas source equipment can provide detection gas at a first pressure value. A first detection path can reduce the detection gas from the first pressure value to a second pressure value. A second detection path can reduce the detection gas from the first pressure value to a third pressure value. The third pressure value is lower than the second pressure value. In this way, the airtightness of the AEM electrolyzer can be tested under different gas pressures, simplifying the airtightness testing process and improving the efficiency of AEM electrolyzer airtightness testing.

[0006] For example, when it is necessary to perform an airtightness test on the AEM electrolyzer at a second pressure value, the control module can shut off the second detection path and open the first detection path until the pressure of the AEM electrolyzer reaches the first pressure threshold, at which point the first detection path is shut off. In this way, the detection gas with the second pressure value can be introduced into the AEM electrolyzer, placing it in a sealed environment. At this point, the control module can determine whether the airtightness of the AEM electrolyzer is qualified by acquiring the fourth pressure value.

[0007] For example, when it is necessary to test the airtightness of the AEM electrolyzer at a third pressure value, the control module can shut off the first detection path and shut off the second detection path after a second duration. In this way, the detection gas at the third pressure value can be introduced into the AEM electrolyzer, placing it in a sealed environment. At this point, the control module can determine whether the airtightness of the AEM electrolyzer is up to standard by acquiring the fifth pressure value.

[0008] It should be understood that when the AEM electrolytic cell is in a closed environment, the pressure value of the corresponding detection path is basically the same as, or even exactly the same as, the pressure value of the AEM electrolytic cell.

[0009] In one possible implementation of the first aspect, the first detection path may include a first sub-path segment and a second sub-path segment in addition to the common path segment. The input terminal of the first sub-path segment is connected to the common path segment, and the output terminal of the first sub-path segment is connected to the input terminal of the second sub-path segment and the second detection terminal of the AEM electrolytic cell. The output terminal of the second sub-path segment is connected to the first detection terminal of the AEM electrolytic cell. Furthermore, the first and second sub-path segments are respectively connected to the control module.

[0010] In addition to the common path segment, the aforementioned second detection path may also include a third sub-path segment. The input of the third sub-path segment is connected to the common path segment, and the output of the third sub-path segment is connected to the second detection terminal of the AEM electrolytic cell. Furthermore, the third sub-path segment is also connected to the control module.

[0011] Based on this, the control module controls the second detection path to shut down and the first detection path to open, which may include: the control module controlling the third sub-path segment to shut down, and controlling the common path segment, the first sub-path segment, and the second sub-path segment to all be open. The above-mentioned shutdown of the first detection path when the pressure of the AEM electrolytic cell reaches the first pressure threshold includes: controlling the first sub-path segment to shut down when the pressure of the AEM electrolytic cell reaches the first pressure threshold. Thus, after the AEM electrolytic cell is filled with detection gas at the second pressure value, it is in a sealed environment.

[0012] The aforementioned control module controls the first detection path to shut down and the second detection path to open, which may include: the control module controlling the first sub-path segment and the second sub-path segment to shut down, and controlling both the common path segment and the third sub-path segment to open. When the pressure of the AEM electrolyzer reaches the second pressure threshold, the control module shuts down the second detection path, which may include: when the pressure of the AEM electrolyzer reaches the second pressure threshold, controlling the third sub-path segment to shut down. In this way, after the AEM electrolyzer is filled with detection gas at the third pressure value, it is in a closed environment.

[0013] In another possible implementation of the first aspect, the aforementioned common passage segment may include: a first pressure reducing valve, and a first switching valve and a multi-way valve respectively connected to the control module.

[0014] The first pressure-reducing valve has its input connected to the input of the airtightness testing equipment, and its output connected to the input of the first switching valve. When the gas source supplies testing gas with a first pressure value to the airtightness testing equipment, the first pressure-reducing valve can reduce the pressure of the testing gas from the first pressure value to a second pressure value. Thus, the pressure of the testing gas at the input of the airtightness testing equipment is the second pressure value. The output of the first switching valve is connected to the input of a multi-way valve. The first output of the multi-way valve is connected to the input of a first sub-channel, and the second output of the multi-way valve is connected to the input of a third sub-channel. The inputs of the first unloading valve and the second switching valve are respectively connected to the output of the first switching valve.

[0015] Based on this, while controlling the first detection path to be open, the control module controls the common path segment to be open. This can include: the control module controlling the input and output ends of the first switching valve to be open, controlling the input and first output ends of the multi-way valve to be open, controlling the input and output ends of the second switching valve to be closed, and controlling the input and output ends of the first unloading valve to be closed. In this way, the input end of the first pressure reducing valve is connected to the first output end of the multi-way valve, allowing the detection gas to flow through the common path segment to the first sub-path segment.

[0016] When the second detection path is open, the control module controls the common path segment to be open, which may include: the control module controlling the input and output ends of the first switching valve to be open, controlling the input and second output ends of the multi-way valve to be open, controlling the input and output ends of the second switching valve to be closed, and controlling the input and output ends of the first unloading valve to be closed. In this way, the input end of the first pressure reducing valve is connected to the first output end of the multi-way valve, allowing the detection gas to flow through the common path segment to the second sub-path segment, and preventing the detection gas from leaking from the first unloading valve and / or the second switching valve.

[0017] In another possible implementation of the first aspect, the aforementioned common passage segment may further include: a first unloading valve and a second switching valve, respectively connected to the control module. The input terminal of the first unloading valve and the input terminal of the second switching valve are respectively connected to the output terminal of the first switching valve.

[0018] Based on this, regardless of whether the first detection path or the second detection path is being controlled to be open, controlling the common path segment to be open can further include: controlling the input and output ends of the second switching valve to be closed, and controlling the input and output ends of the first unloading valve to be closed. This prevents the detection gas from leaking into the common path segment via the first unloading valve and / or the second switching valve.

[0019] In addition, when the airtightness testing process of the AEM electrolyzer is completed, the control module can control the input and output terminals of the second switching valve to open and close, so as to discharge the test gas in the airtightness testing equipment.

[0020] During the airtightness testing of the AEM electrolytic cell, if the pressure value exceeds the upper limit of the corresponding operating condition, the control module can control the input and output terminals of the first unloading valve to depressurize the airtightness testing equipment, avoid equipment failure, and ensure operational safety.

[0021] In another possible implementation of the first aspect, the aforementioned first sub-path segment may include: a third switching valve and a fourth switching valve, respectively connected to the control module. The input end of the third switching valve is connected to the first output end of the multi-port valve. The output end of the third switching valve is connected to the input end of the second sub-path segment and the second detection end of the AEM electrolyzer. The input end of the fourth switching valve is connected to the output end of the third switching valve. A pressure sensor is located between the output end of the third switching valve and the second detection end of the AEM electrolyzer, and is used to acquire the pressure value of the AEM electrolyzer, such as a fourth pressure value or a fifth pressure value.

[0022] Based on this, the aforementioned control module controls the first sub-path segment to be open, which may include: the control module controlling the input and output terminals of the third switching valve to be open, and controlling the input and output terminals of the fourth switching valve to be closed. This ensures that the detection gas from the first sub-path segment flows to the second sub-path segment, and prevents leakage from the fourth switching valve.

[0023] The aforementioned control module controls the shutdown of the first sub-channel segment, which may include: the control module controlling the shutdown of the input and output terminals of the third switching valve, and controlling the shutdown of the input and output terminals of the fourth switching valve.

[0024] In addition, when the airtightness test process of the AEM electrolyzer under the second pressure value is completed, the control module can control the input and output terminals of the fourth switching valve to conduct, which can accelerate the discharge of the test gas in the airtightness test equipment.

[0025] In another possible implementation of the first aspect, the aforementioned second sub-path segment may include a fifth switching valve connected to the control module. The input of the fifth switching valve is connected to the output of the first sub-path segment, and the output of the fifth switching valve is connected to the first detection terminal of the AEM electrolytic cell.

[0026] Based on this, the control module controls the second sub-circuit segment to be open, which may include: the control module controlling the input and output terminals of the fifth switching valve to be open. The control module controls the second sub-circuit segment to be closed, which may include: the control module controlling the input and output terminals of the fifth switching valve to be closed.

[0027] In another possible implementation of the first aspect, the aforementioned second sub-path segment may further include a sixth switching valve connected to the control module. The input of the sixth switching valve is connected to the output of the fifth switching valve.

[0028] Based on this, the control module controls the opening or closing of the second sub-circuit segment, and also includes controlling the closing of the input and output terminals of the sixth switching valve. This prevents leakage of the detection gas in the second sub-circuit segment.

[0029] In another possible implementation of the first aspect, the aforementioned third sub-passage includes: a second pressure reducing valve, a check valve, and a seventh switching valve, a second unloading valve, and an eighth switching valve connected to the control module.

[0030] The input end of the second pressure reducing valve is connected to the second output end of the multi-way valve, and the output end of the second pressure reducing valve is connected to the input end of the one-way valve. The second pressure reducing valve is used to reduce the detection gas from a second pressure value to a third pressure value. The input end of the one-way valve is connected to the output end of the second pressure reducing valve, and the output end of the one-way valve is connected to the input end of the eighth switching valve. The output end of the eighth switching valve is connected to the second detection end. The input ends of the seventh switching valve and the second unloading valve are connected to the output end of the second pressure reducing valve. Based on this, the control module controls the third sub-path segment to be open, which may include: controlling the input and output ends of the eighth switching valve to be open, controlling the input and output ends of the seventh switching valve to be closed, and controlling the input and output ends of the second unloading valve to be closed. Controlling the shutdown of the third sub-channel segment includes: controlling the shutdown of the input and output terminals of the eighth switching valve, controlling the shutdown of the input and output terminals of the seventh switching valve, and controlling the shutdown of the input and output terminals of the second unloading valve.

[0031] In another possible implementation of the first aspect, the second pressure value is greater than or equal to 1.6 MPa, and the third pressure value is less than or equal to 350 kPa.

[0032] Secondly, an airtightness testing system is provided, comprising: an AEM electrolytic cell, and the airtightness testing device described in the first aspect and any one thereof. The input terminal of the airtightness testing device is used to connect to a gas source device, which provides a testing gas to the airtightness testing device. A first output terminal of the airtightness testing device is connected to a first detection terminal of the AEM electrolytic cell, and a second output terminal of the airtightness testing device is connected to a second detection terminal of the AEM electrolytic cell.

[0033] It is understood that the beneficial effects that the airtightness detection system described in the second aspect above can achieve can be referred to as the beneficial effects in the first aspect and any of its possible implementations, and will not be repeated here. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of an airtightness detection system provided in an embodiment of this application; Figure 2 This is one of the structural schematic diagrams of an airtightness testing device provided in an embodiment of this application; Figure 3 This is one of the state diagrams of an airtightness testing device provided in an embodiment of this application; Figure 4 This is a second schematic diagram of the state of an airtightness testing device provided in an embodiment of this application; Figure 5This is a second schematic diagram of the structure of an airtightness testing device provided in an embodiment of this application; Figure 6 This is a schematic diagram of an airtightness testing process provided in an embodiment of this application. Detailed Implementation

[0035] Hydrogen exists in nature in the form of compounds, such as water and methane (CH4), so it cannot be obtained in large quantities directly from nature and must be obtained through specific production processes relying on other energy sources. Therefore, hydrogen energy is called a secondary energy source.

[0036] Hydrogen production processes are diverse. For example, hydrogen can be obtained by reforming fossil fuels such as coal, oil, and natural gas. Another example is through microbial fermentation and biomass pyrolysis. Yet another example is industrial byproduct hydrogen, which is produced as a byproduct of main product manufacturing processes such as coking, chlor-alkali, steel, and metallurgy. Another example is hydrogen production through water electrolysis. AEM technology is an emerging water electrolysis hydrogen production technology that utilizes AEM electrolyzers to produce hydrogen under mild conditions with non-precious metal catalysts. Its low cost has led to its widespread application and large-scale production of AEM electrolyzers.

[0037] With the mass production of AEM electrolyzers, product quality has become a pressing issue. Among the many quality control steps for AEM electrolyzers, airtightness testing is crucial. Airtightness testing includes high-pressure airtightness testing and low-pressure airtightness testing. High-pressure airtightness testing involves simulating the actual operating conditions of an AEM electrolyzer under high pressure (e.g., 1.6 MPa) to verify its airtightness and pressure resistance under high-pressure conditions. Low-pressure airtightness testing involves quickly screening the basic sealing of the AEM electrolyzer under low pressure (e.g., 350 kPa), primarily used for leak detection.

[0038] Currently, the airtightness of an AEM electrolyzer can be tested in the following two ways: Method 1 involves testing the airtightness of the AEM electrolyzer under both low-pressure and high-pressure conditions using a self-made, simple pressure-holding device. Generally, this device consists of a nitrogen cylinder (the gas source), piping, and at least one pressure-reducing valve on the piping. Under different pressures, manual adjustment of the assembly and manual opening of the corresponding valves are required, along with continuous recording of pressure data from the testing channel and calculation of relevant values. Therefore, this testing process demands extremely high operator skill, is cumbersome, prone to errors, and can even damage the AEM electrolyzer. Furthermore, it has low testing efficiency and cannot meet the testing requirements of mass-produced AEM electrolyzers.

[0039] Option 2 involves outsourcing the development of custom testing equipment from a third-party manufacturer to perform airtightness testing on the AEM electrolyzer. However, this method is costly and therefore not economically viable, making it unsuitable for large-scale implementation.

[0040] Therefore, this application provides an airtightness testing device and system. The device uses a small number of valves and pipes to assemble two testing channels, resulting in a simple structure and low cost. The input end of each testing channel is connected to a gas source device, and the output end of each channel is connected to different testing terminals of the AEM electrolytic cell. The device can automatically shut off one testing channel and turn on the other for a period of time before shutting it off, based on testing requirements. This allows for airtightness testing of the AEM electrolytic cell under different gas pressures, simplifying the airtightness testing process and improving the efficiency of AEM electrolytic cell airtightness testing.

[0041] For ease of understanding, the following text will combine... Figures 1-6 This application describes the airtightness testing equipment, system, and testing process provided in the embodiments of this application.

[0042] Figure 1 A schematic diagram of an airtightness detection system provided in an embodiment of this application is shown.

[0043] In one example, such as Figure 1 As shown, the airtightness testing system may include an airtightness testing device 101 and an AEM electrolytic cell 102. The airtightness testing device 101 includes two testing paths: a first testing path 1011 and a second testing path 1012. The first testing path 1011 and the second testing path 1012 share a common path segment 1013, the starting end of which is the input end of the airtightness testing device 101, which can be connected to a gas source device 103. The output end of the first testing path 1011 is connected to the first testing end A of the AEM electrolytic cell 102, and the output end of the second testing path 1012 is connected to the second testing end B of the AEM electrolytic cell 102.

[0044] The gas source device 103 can supply the airtightness testing device 101 with a detection gas, such as nitrogen, at a first pressure value. The first detection passage 1011 can reduce the detection gas from the first pressure value to a second pressure value. The second detection passage 1012 can reduce the detection gas from the first pressure value to a third pressure value. The third pressure value is lower than the second pressure value. The second pressure value falls within the high-pressure range, and the third pressure value falls within the low-pressure range. For example, the second pressure value is greater than or equal to 1.6 MPa, and the third pressure value is less than or equal to 350 kPa.

[0045] When it is necessary to perform an airtightness test on the AEM electrolytic cell 102 at the second pressure value, the airtightness testing device 101 can control the second detection path 1012 to shut off and control the first detection path 1011 to open. In this way, the second detection path 1012 is connected to the AEM electrolytic cell 102, and the detection gas with the second pressure value can be introduced into the AEM electrolytic cell 102 until the pressure value of the AEM electrolytic cell 102 reaches the first pressure threshold, at which point the first detection path 1011 is shut off. Thus, the AEM electrolytic cell 102 is in a sealed environment. At this time, the airtightness testing device 101 can determine whether the airtightness of the AEM electrolytic cell 102 is qualified by continuously acquiring the fourth pressure value of the AEM electrolytic cell 102.

[0046] When an airtightness test is required on the AEM electrolytic cell 102 at a third pressure value, the airtightness testing device 101 can control the first detection path 1011 to shut off and the second detection path 1012 to open. In this way, the second detection path 1012 is connected to the AEM electrolytic cell 102, and the detection gas with the third pressure value can be introduced into the AEM electrolytic cell 102 until the pressure value of the AEM electrolytic cell 102 reaches the second pressure threshold, at which point the second detection path 1012 is shut off. Thus, the AEM electrolytic cell 102 is in a sealed environment. At this time, the airtightness testing device 101 can determine whether the airtightness of the AEM electrolytic cell 102 is qualified by continuously acquiring the fifth pressure value of the AEM electrolytic cell 102. The second pressure threshold is less than the first pressure threshold.

[0047] In this way, the air tightness testing equipment 101 can automatically perform air tightness testing on the AEM electrolytic cell 102 under different air pressures, which simplifies the air tightness testing process of the AEM electrolytic cell 102, improves the air tightness testing efficiency of the AEM electrolytic cell 102, and reduces the labor cost in the testing process.

[0048] Optionally, the airtightness testing system may also include the aforementioned gas source equipment. The gas source equipment may be a nitrogen storage device, such as a nitrogen cylinder.

[0049] In one example, continue as follows Figure 1 As shown, the airtightness testing device 101, in addition to including the first detection path 1011 and the second detection path 1012, may also include a control module 201 and a pressure sensor 202. The control module 201 is connected to both the first detection path 1011 and the second detection path 1012, controlling the first detection path 1011 and the second detection path 1012 to be turned on or off. The pressure sensor 202 is also connected to the first detection path 1011, the second detection path 1012, and the control module 201. Thus, the control module 201 can obtain the pressure value of any detection path through the pressure sensor 202.

[0050] Figure 2 This illustration shows one of the structural schematic diagrams of an airtightness testing device provided in an embodiment of this application.

[0051] In one example, such as Figure 2 As shown, the first detection path, in addition to the common path segment 1013, may also include a first sub-path segment 203 and a second sub-path segment 204. The second detection path, in addition to the common path segment 1013, may also include a third sub-path segment 205. The pressure sensor 202 is located at the connection point of the first sub-path segment 203, the second sub-path segment 204, and the third sub-path segment 205, and is used to acquire pressure values, such as the fourth and fifth pressure values ​​in the pressure holding stage.

[0052] The input terminal of the first sub-path segment 203 is connected to the output terminal of the common path segment 1013, and the output terminal of the first sub-path segment 203 is connected to the input terminal of the second sub-path segment 204 and the second detection terminal B of the AEM electrolytic cell. The output terminal of the second sub-path segment 204 is connected to the first detection terminal A of the AEM electrolytic cell 102. Furthermore, the first sub-path segment 203 and the second sub-path segment 204 are respectively connected to the control module. Thus, the control module can control the first sub-path segment 203 and the second sub-path segment 204 to be turned on or off respectively.

[0053] The input terminal of the third sub-path segment 205 is connected to the output terminal of the common path segment 1013, and the output terminal of the third sub-path segment 205 is connected to the second detection terminal B of the AEM electrolytic cell. Furthermore, the third sub-path segment 205 is connected to the control module. Thus, the control module can control the third sub-path segment 205 to be turned on or off.

[0054] The control module is also connected to the common path segment 1013, thereby enabling control of the common path segment 1013 to be turned on or off.

[0055] Since the first detection path and the second detection path share the common path segment 1013, and the common path segment 1013 is the starting segment of the first detection path and the second detection path, the control module controls the common path segment 1013 to be turned on during the process of the gas source equipment supplying detection gas to the AEM electrolysis cell 102 through any detection path.

[0056] Based on this, the control module controls the second detection path to shut down, which may include: the control module controlling the shutdown of the third sub-path segment. The control module controls the first detection path to be open, which may include: the control module controlling the common path segment, the first sub-path segment, and the second sub-path segment to be open. Thus, the gas source equipment fills the AEM electrolyzer with detection gas having a second pressure value. As the detection gas is filled, when the pressure in the AEM electrolyzer reaches a first pressure threshold, the control module shuts down the first detection path. This control module may include: the control module controlling the shutdown of the first sub-path segment, but the second sub-path segment remains open. After the first sub-path segment is shut down, the second sub-path segment and the AEM electrolyzer form a sealed environment, and the testing phase enters the pressure holding stage. The pressure sensor is located in this sealed environment. At this time, the control module can determine the airtightness of the AEM electrolyzer by obtaining the pressure value of this sealed environment through the pressure sensor.

[0057] Optionally, in the pressure holding phase, the control module can control the shutdown of both the first sub-path segment and the common path segment. Of course, in the pressure holding phase, it is also possible to control only the shutdown of the first sub-path segment.

[0058] The aforementioned control module controls the first detection path to shut down, which may include: the control module controlling both the first and second sub-path segments to shut down. The aforementioned control module controls the second detection path to open, which may include: the control module controlling both the common path segment and the third sub-path segment to open. Thus, the gas source equipment fills the AEM electrolyzer with detection gas having a third pressure value. As the detection gas is filled, when the pressure in the AEM electrolyzer reaches the second pressure threshold, the control module shuts down the second detection path. This control module may also include: the control module controlling the third sub-path segment to shut down. After the third sub-path segment is shut down, the pressure sensor and the AEM electrolyzer form a sealed environment, and the testing phase enters the pressure holding stage. At this time, the control module can determine the airtightness of the AEM electrolyzer by obtaining the pressure value of this sealed environment through the pressure sensor.

[0059] Optionally, in the pressure holding phase, the control module can control the shutdown of both the third sub-path segment and the common path segment. Of course, in the pressure holding phase, it is also possible to control only the shutdown of the third sub-path segment.

[0060] It should be understood that the pressure value of the closed environment in the above process can represent the pressure value of the AEM electrolytic cell.

[0061] In one example, continue as follows Figure 2As shown, the common passage section 1013 may include a first pressure reducing valve 01, a first switching valve 02, and a multi-way valve 05. The input of the first pressure reducing valve 01 is connected to the input of the airtightness testing device 101, and the output of the first pressure reducing valve 01 is connected to the input of the first switching valve 02. The first pressure reducing valve can reduce the pressure of the test gas from a first pressure value to a second pressure value. The output of the first switching valve 02 is connected to the input of the multi-way valve 05. The first output of the multi-way valve 05 is connected to the input of the first sub-passage section 203, and the second output of the multi-way valve 05 is connected to the input of the third sub-passage section 205. The control terminals of the first switching valve 02 and the multi-way valve 05 are respectively connected to the control module 201. The control module 201 controls the first switching valve 02 to be open or closed, and controls the input of the multi-way valve 05 to be connected to either the first or second output terminal.

[0062] It should be noted that the pressure reducing valve does not need to be connected to the control module, and most pressure reducing valves are unidirectional. Different pressure reducing valves have different pressure reducing values. The first pressure reducing valve discussed in this article can be understood as a primary pressure reducing valve.

[0063] Figure 3 This illustration shows one of the state diagrams of an airtightness testing device provided in an embodiment of this application. Figure 4 This is a second schematic diagram of the state of an airtightness testing device provided in an embodiment of this application.

[0064] In one example, such as Figure 3 As shown, when the first detection path is open, the control module controls the common path segment to be open, which may include: controlling the input and output terminals of the first switching valve 02 to be open, and controlling the input and first output terminals of the multi-way valve 05 to be open. In this way, the common path segment is connected to the first sub-path segment.

[0065] In another example, such as Figure 4 As shown, when the second detection path is activated, the control module activates the common path segment, which may include: activating the input and output terminals of the first switching valve 02, and activating the input and second output terminals of the multi-way valve 05. In this way, the common path segment is connected to the third sub-path segment.

[0066] Furthermore, continuing as Figures 2-4 As shown in any of the figures, the common passage section may further include a second switching valve 03 and a first unloading valve 04 located between the first switching valve 02 and the multi-way valve 05. The input terminals of the second switching valve 03 and the first unloading valve 04 are respectively connected to the output terminal of the first switching valve 02. The control terminals of the second switching valve 03 and the first unloading valve 04 are respectively connected to the control module.

[0067] Based on this, the control module, which controls the opening of the common passage section, may further include controlling the shut-off of the second switching valve and the first unloading valve. This prevents the detection gas entering the common passage section from leaking through the second switching valve and the first unloading valve.

[0068] Once the airtightness test is completed, the control module can control the second switching valve to open, allowing the test gas in the airtightness testing equipment to be discharged through the second switching valve, so as to facilitate the next airtightness test.

[0069] During the airtightness test, if the pressure value exceeds the upper limit of the corresponding operating condition, the control module can control the first unloading valve to open, so as to relieve the pressure of the airtightness test equipment, avoid equipment failure, and ensure operational safety.

[0070] In one example, continue as follows Figures 2-4 As shown in any of the figures, the first sub-path segment may include a third switching valve 06 and a fourth switching valve 07. The input terminal of the third switching valve 06 is connected to the first output terminal of the multi-port valve 05, and the output terminal of the third switching valve 06 is connected to the input terminal of the second sub-path segment and the second detection terminal B of the AEM electrolytic cell. The input terminal of the fourth switching valve 07 is connected to the output terminal of the third switching valve 06.

[0071] Based on this, the control module controls the first sub-path to be open, which may include: the control module controlling the input and output terminals of the third switching valve 06 to be open, and controlling the input and output terminals of the fourth switching valve 07 to be closed. This ensures that the detection gas in the first sub-path flows to the second sub-path and prevents leakage from the fourth switching valve.

[0072] It should be noted that, continuing as Figure 3 As shown, since the output end of the third switching valve 06 is connected to the second detection end B of the AEM electrolytic cell, when the input and output ends of the third switching valve 06 are connected, the first sub-path segment is connected to the AEM electrolytic cell.

[0073] The aforementioned control module controls the shutdown of the first sub-circuit, which may include: the control module controlling the shutdown of the input and output terminals of the third switching valve, and controlling the shutdown of the input and output terminals of the fourth switching valve.

[0074] In addition, when the airtightness test process of the AEM electrolyzer under the second pressure value is completed, the control module can control the second switch valve 03 to open and the fourth switch valve 07 to open, thereby accelerating the discharge of the test gas in the airtightness test equipment.

[0075] In one example, continue as follows Figures 2-4As shown in any of the figures, the second sub-path segment may include: a fifth switching valve 08. The input terminal of the fifth switching valve 08 is connected to the output terminal of the first sub-path segment, the output terminal of the fifth switching valve 08 is connected to the first detection terminal A of the AEM electrolytic cell, and the control terminal of the fifth switching valve 08 is connected to the control module.

[0076] Based on this, the control module's control of the second sub-circuit's conduction can include: the control module controlling the input and output terminals of the fifth switching valve to conduct. The control module's control of the second sub-circuit's shutdown can include: the control module controlling the input and output terminals of the fifth switching valve to shut down.

[0077] Furthermore, continuing as Figures 2-4 As shown in any of the figures, the second sub-path segment may further include a sixth switching valve 09 located between the fifth switching valve 08 and the first detection terminal A of the AEM electrolytic cell. The input terminal of the sixth switching valve 09 is connected to the output terminal of the fifth switching valve 08. The output terminal of the sixth switching valve 09 may be connected to other pressure testing devices.

[0078] Based on this, the sixth control module controls the opening or closing of the second sub-circuit, and also includes controlling the opening of the sixth switching valve. This facilitates the external pressure testing device to obtain the pressure value of the first detection circuit. The pressure value obtained by the external pressure testing device can be compared with the pressure value obtained by the pressure sensor to determine the accuracy of the pressure sensor.

[0079] If no device is connected to the output of the sixth switching valve, the control module controls the second sub-circuit to open or close, and also controls the input and output of the sixth switching valve to close. This prevents the detection gas in the second sub-circuit from leaking out through the sixth switching valve.

[0080] In one example, continue as follows Figures 2-4As shown in any of the figures, the third sub-passage section may include: a second pressure reducing valve 10, a one-way valve 13, a seventh switching valve 11, a second unloading valve 12, and an eighth switching valve 14. The input of the second pressure reducing valve 10 is connected to the second output of the multi-way valve 05, and the output of the second pressure reducing valve 10 is connected to the input of the one-way valve 13. The second pressure reducing valve 10 can reduce the detection gas provided by the common passage section from a second pressure value to a third pressure value. The second pressure reducing valve 10 can be understood as a two-stage pressure reducing valve. The input of the one-way valve 13 is connected to the output of the second pressure reducing valve 10, and the output of the one-way valve 13 is connected to the input of the eighth switching valve 14. The output of the eighth switching valve 14 is connected to the second detection end of the AEM electrolytic cell. The seventh switching valve 11 and the second unloading valve 12 are both located between the second pressure reducing valve 10 and the one-way valve 13. The inputs of the seventh switching valve 11 and the second unloading valve 12 are respectively connected to the output of the second pressure reducing valve 10. The control terminals of the seventh switching valve 11, the second unloading valve 12, and the eighth switching valve 14 are respectively connected to the control module.

[0081] Based on this, the control module controls the third sub-path segment to be open, which may include: controlling the input and output terminals of the eighth switching valve to be open, controlling the input and output terminals of the seventh switching valve to be closed, and controlling the input and output terminals of the second unloading valve to be closed. In this way, the detection gas provided by the common path segment, after passing through the third sub-path segment, can have its pressure reduced from the second pressure value to the third pressure value, and leakage of the detection gas from the seventh switching valve and the second unloading valve can be avoided.

[0082] The aforementioned control module controls the shutdown of the third sub-path section, which may include: controlling the shutdown of the input and output terminals of the eighth switching valve, the seventh switching valve, and the second unloading valve. In this way, the detection gas provided by the common path section cannot flow to the AEM electrolyzer through the third sub-path section.

[0083] It should be noted that the airtightness testing equipment disclosed in this application also includes pipelines. For example, the output end of one valve is connected to the input end of another valve via a pipeline. As another example, the output end of the fifth switching valve 08 is connected to the first detection end A of the AEM electrolytic cell via a pipeline. These will not be listed exhaustively here. Assembling the pipelines and valves is simple and quick.

[0084] Figure 5 The second schematic diagram shows the structure of an airtightness testing device provided in an embodiment of this application.

[0085] In one example, such as Figure 5As shown in the embodiments of this application, the airtightness testing device may include: a processor, a memory, an input / output interface (I / O), a communication interface, a display unit, and an input device.

[0086] The processor, memory, and input / output interface are connected via a system bus, and the communication interface is also connected to the system bus via the input / output interface. The processor of this airtightness testing device provides computational and control capabilities. The memory of this airtightness testing device includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface of this computer device is used for exchanging information between the processor and external devices. The communication interface of this computer device is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements… Figure 6 The process is illustrated. The display unit of the airtightness testing equipment is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the airtightness testing equipment can be a touch layer covering the display screen, or buttons, a trackball, or a touchpad set on the housing of the airtightness testing equipment, or an external keyboard, touchpad, or mouse, etc.

[0087] The processor can be a general-purpose processor, including a Central Processing Unit (CPU), a network processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The processor can also be other general-purpose processors. A general-purpose processor can be a microprocessor or any conventional processor.

[0088] This involves communication connections between the memory, communication interface, and processor. For example, the memory and communication interface can connect to the processor via the system bus and communicate with each other. The system bus can be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, an industry standard architecture (ISA) bus, etc. The system bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0089] Alternatively, the memory can be either standalone or integrated with the processor. When the memory is set up independently, it is connected to the processor via the system bus.

[0090] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the airtightness testing device to which the present application is applied. The specific airtightness testing device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0091] The above text combined Figures 1-5 This paper introduces the structure and detection principle of an airtightness testing device provided in an embodiment of this application. The following section combines... Figure 6 This section introduces the airtightness testing process.

[0092] Figure 6 A schematic diagram of an airtightness testing process provided in an embodiment of this application is shown.

[0093] In one example, such as Figure 6 As shown, the airtightness testing process may include: S1. In response to the power-on command, the airtightness testing equipment is powered on.

[0094] The power-on command refers to the command to start the airtightness testing equipment.

[0095] S2. The airtightness testing equipment performs a self-test process.

[0096] The airtightness testing equipment includes a pre-stored self-test process. This process may include checking whether each valve in the airtightness testing equipment is in its initial state. For example, the initial state of the first switching valve is the closed state.

[0097] If the state of each valve is not in the initial state, the self-test is normal, and the airtightness testing equipment can execute S3 as follows; if the state of any valve is not in the initial state, the self-test is abnormal, and the airtightness testing equipment can execute S6 as follows.

[0098] S3. In response to the selection of high-pressure operating conditions for testing, the airtightness testing equipment executes the high-pressure airtightness testing process.

[0099] The high-pressure airtightness testing process may include: the airtightness testing equipment controls the second detection path to shut off and controls the first detection path to open until the pressure value of the AEM electrolyzer reaches the first pressure threshold, at which point the second detection path is shut off. Afterward, a fourth pressure value of the AEM electrolyzer is continuously acquired to determine whether the airtightness of the AEM electrolyzer under high-pressure conditions is qualified. For details, please refer to the above description; this will not be elaborated upon further in this article.

[0100] In some examples, during the S3 test, if the fourth pressure value is greater than the upper limit of the pressure under high pressure conditions, the airtightness testing equipment can open the first unloading valve 04 to relieve the pressure on the airtightness testing equipment.

[0101] S4. In response to the selection of low-pressure operating condition testing, the airtightness testing equipment performs the low-pressure airtightness testing procedure.

[0102] The low-pressure airtightness testing process may include: the airtightness testing equipment controls the first detection path to shut off and controls the second detection path to open until the pressure value of the AEM electrolyzer reaches the second pressure threshold, at which point the second detection path is shut off. Afterward, the fifth pressure value of the AEM electrolyzer is continuously acquired to determine whether the airtightness of the AEM electrolyzer under low-pressure conditions is qualified. For details, please refer to the above description; this will not be elaborated upon further in this article.

[0103] In some examples, during the S4 test, if the fifth pressure value is greater than the upper limit of the pressure under low pressure conditions, the airtightness testing device can open the second unloading valve 12 to depressurize the airtightness testing device.

[0104] S5. In response to the shutdown command, the airtightness testing equipment executes the pressure relief process.

[0105] Among them, the shutdown command refers to the command to shut down the airtightness testing equipment.

[0106] When the airtightness testing procedure is a high-pressure airtightness testing procedure, the airtightness testing equipment executes a first pressure relief procedure. The first pressure relief procedure may include: opening the second switching valve 03. In some examples, the first pressure relief procedure may also include: opening the fourth switching valve 07.

[0107] When the airtightness testing procedure is a low-pressure airtightness testing procedure, the airtightness testing equipment executes a second pressure relief procedure. The second pressure relief procedure may include: activating the second switching valve 03. In some examples, the second pressure relief procedure may also include: activating the seventh switching valve 11.

[0108] S6. Shut down the airtightness testing equipment.

[0109] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0110] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to implement the solution of this embodiment according to actual needs.

[0111] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The unit composed of the above modules can be implemented in hardware or in the form of hardware plus software functional units.

[0112] It should be understood that the steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

[0113] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0114] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An airtightness testing device, characterized in that, include: A control module, and a first detection path, a second detection path, and a pressure sensor respectively connected to the control module; the first detection path and the second detection path are respectively connected to the pressure sensor; The first detection path and the second detection path share a common path segment from the input end of the airtightness testing device; the output end of the first detection path is used to connect to the first detection end of the anion exchange membrane electrolyzer; the output end of the second detection path is used to connect to the second detection end of the anion exchange membrane electrolyzer; the first detection end and the second detection end are different. The input terminal of the airtightness testing device is used to connect to a gas source device, which provides testing gas to the airtightness testing device; the first detection path is used to reduce the testing gas from a first pressure value to a second pressure value, and the second detection path is used to reduce the testing gas from the first pressure value to a third pressure value; the third pressure value is less than the second pressure value; the control module is used for: The second detection path is turned off, and the first detection path is turned on. When the pressure of the anion exchange membrane electrolyzer reaches the first pressure threshold, the first detection path is turned off, and the fourth pressure value of the anion exchange membrane electrolyzer is obtained. Based on the fourth pressure value, it is determined whether the airtightness of the anion exchange membrane electrolyzer is qualified. or, The first detection path is turned off, and the second detection path is turned on. When the pressure of the anion exchange membrane electrolyzer reaches the second pressure threshold, the second detection path is turned off, and the fifth pressure value of the anion exchange membrane electrolyzer is obtained. Based on the fifth pressure value, it is determined whether the airtightness of the anion exchange membrane electrolyzer is qualified; the second pressure threshold is less than the first pressure threshold.

2. The airtightness testing device according to claim 1, characterized in that, The first detection path further includes a first sub-path segment and a second sub-path segment; the input end of the first sub-path segment is connected to the common path segment, the output end of the first sub-path segment is connected to the input end of the second sub-path segment and the second detection end, the output end of the second sub-path segment is connected to the first detection end, and the first sub-path segment and the second sub-path segment are respectively connected to the control module; The second detection path further includes a third sub-path segment; the input end of the third sub-path segment is connected to the common path segment, the output end of the third sub-path segment is connected to the second detection end, and the third sub-path segment is connected to the control module; The step of controlling the second detection path to be turned off and controlling the first detection path to be turned on includes: controlling the third sub-path segment to be turned off and controlling the common path segment, the first sub-path segment and the second sub-path segment to be turned on; The step of shutting off the first detection pathway when the pressure of the anion exchange membrane electrolyzer reaches the first pressure threshold includes: controlling the first sub-path segment to shut down when the pressure of the anion exchange membrane electrolyzer reaches the first pressure threshold. The step of controlling the first detection path to be turned off and controlling the second detection path to be turned on includes: controlling both the first sub-path segment and the second sub-path segment to be turned off, and controlling both the common path segment and the third sub-path segment to be turned on; The step of shutting off the second detection pathway when the pressure of the anion exchange membrane electrolyzer reaches the second pressure threshold includes: controlling the third sub-path segment to shut off when the pressure of the anion exchange membrane electrolyzer reaches the second pressure threshold.

3. The airtightness testing device according to claim 2, characterized in that, The common passage section includes: a first pressure reducing valve, and a first switching valve and a multi-way valve respectively connected to the control module; The input end of the first pressure reducing valve is connected to the input end of the airtightness testing device, and the output end of the first pressure reducing valve is connected to the input end of the first switching valve. The first pressure reducing valve is used to reduce the pressure of the detection gas from a first pressure value to a second pressure value. The output end of the first switching valve is connected to the input end of the multi-way valve. The first output end of the multi-way valve is connected to the input end of the first sub-passage section, and the second output end of the multi-way valve is connected to the input end of the third sub-passage section. When controlling the first detection path to be open, controlling the common path segment to be open includes: controlling the input and output ends of the first switching valve to be open, and controlling the input and first output ends of the multi-way valve to be open; When controlling the second detection path to be open, controlling the common path segment to be open includes: controlling the input and output ends of the first switching valve to be open, and controlling the input and second output ends of the multi-way valve to be open.

4. The airtightness testing device according to claim 3, characterized in that, The common passage section further includes: a first unloading valve and a second switching valve respectively connected to the control module; the input end of the first unloading valve and the input end of the second switching valve are respectively connected to the output end of the first switching valve; Controlling the common passage section to be open also includes: controlling the input and output ends of the second switching valve to be closed, and controlling the input and output ends of the first unloading valve to be closed.

5. The airtightness testing device according to any one of claims 2-4, characterized in that, The first sub-path segment includes: a third switching valve and a fourth switching valve respectively connected to the control module; the input end of the third switching valve is connected to the first output end of the multi-port valve; the output end of the third switching valve is connected to the input end of the second sub-path segment and the second detection end; the input end of the fourth switching valve is connected to the output end of the third switching valve; the pressure sensor is located between the output end of the third switching valve and the second detection end, and is used to obtain the pressure value of the anion exchange membrane electrolyzer. Controlling the first sub-channel segment to conduct includes: controlling the input and output terminals of the third switching valve to conduct, and controlling the input and output terminals of the fourth switching valve to close. Controlling the first sub-channel segment to shut down includes: controlling the input and output terminals of the third switching valve to shut down, and controlling the input and output terminals of the fourth switching valve to shut down.

6. The airtightness testing device according to claim 4, characterized in that, The second sub-path segment includes a fifth switching valve connected to the control module; the input end of the fifth switching valve is connected to the output end of the first sub-path segment, and the output end of the fifth switching valve is connected to the first detection end; Controlling the second sub-path segment to conduct includes: controlling the input and output terminals of the fifth switching valve to conduct; Controlling the shut-off of the second sub-path segment includes: controlling the shut-off of the input and output terminals of the fifth switching valve.

7. The airtightness testing device according to claim 6, characterized in that, The second sub-path segment also includes a sixth switching valve connected to the control module; the input end of the sixth switching valve is connected to the output end of the fifth switching valve; Controlling the second sub-path segment to be open also includes: controlling the input and output terminals of the sixth switching valve to be closed; Controlling the second sub-path segment to shut down also includes controlling the input and output terminals of the sixth switching valve to shut down.

8. The airtightness testing device according to claim 4, characterized in that, The third sub-passage section includes: a second pressure reducing valve, a one-way valve, and a seventh switching valve, a second unloading valve, and an eighth switching valve connected to the control module; The input end of the second pressure reducing valve is connected to the second output end of the multi-way valve, and the output end of the second pressure reducing valve is connected to the input end of the one-way valve. The second pressure reducing valve is used to reduce the detection gas from a second pressure value to a third pressure value. The output end of the one-way valve is connected to the input end of the eighth switching valve. The output end of the eighth switching valve is connected to the second detection end. The input ends of the seventh switching valve and the second unloading valve are connected to the output end of the second pressure reducing valve. Controlling the third sub-path segment to be open includes: controlling the input and output ends of the eighth switching valve to be open, controlling the input and output ends of the seventh switching valve to be closed, and controlling the input and output ends of the second unloading valve to be closed. Controlling the shutdown of the third sub-channel segment includes: controlling the shutdown of the input and output terminals of the eighth switching valve, controlling the shutdown of the input and output terminals of the seventh switching valve, and controlling the shutdown of the input and output terminals of the second unloading valve.

9. The airtightness testing device according to any one of claims 1-4, characterized in that, The second pressure value is greater than or equal to 1.6 MPa, and the third pressure value is less than or equal to 350 kPa.

10. An airtightness detection system, characterized in that, include: An anion exchange membrane electrolyzer, and the airtightness testing device according to any one of claims 1-9; The input end of the airtightness testing device is used to connect to a gas source device, which is used to provide testing gas to the airtightness testing device; the first output end of the airtightness testing device is connected to the first detection end of the anion exchange membrane electrolyzer, and the second output end of the airtightness testing device is connected to the second detection end of the anion exchange membrane electrolyzer.

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