Multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method

Abstract

The invention provides a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method, and belongs to the technical field of hydrogen storage material performance detection. In the device, a hydrogen source and a carbon monoxide gas source in a gas mixed supply system respectively pass through a pressure reducing valve and a mass flow controller corresponding to the hydrogen source and the carbon monoxide gas source, and then pass through a first valve, a deoxidizing agent device and a dehydrating agent device to be connected with a main pipeline; the argon source is connected into the main pipeline through the pressure reducing valve and the second valve and used for calibrating the volume; the large gas supply tank is connected into the main pipeline through a third valve, and the small gas supply tank is connected into the main pipeline through a quick connector and a fourth valve; the vacuum pump is connected to the main pipeline through a fifth valve; a hydrogen storage alloy is placed in the sample chamber which is connected with the main pipeline through a sixth valve; a temperature control device is arranged outside the sample chamber; and the monitoring and control system is used for detecting and recording the gas pressure change and controlling and monitoring the temperature of the sample chamber. The device can accurately evaluate the hydrogen storage performance change of the hydrogen storage alloy under different poisoning conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen storage material performance detection, and in particular relates to a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method. Background Art

[0002] As an important carrier of clean energy, hydrogen has been widely used in many fields. However, in the current hydrogen preparation process, especially through coke oven gas and other channels, hydrogen is often mixed with other toxic gases (such as carbon monoxide), which poses a challenge to the purity requirements of hydrogen. In order to ensure the high purity of hydrogen, the hydrogen absorption characteristics of hydrogen storage materials are attempted to be used for hydrogen purification. The hydrogen absorption characteristics are that they only react with hydrogen to form metal hydrides under certain temperature and pressure conditions. Patent No. CN108220633A discloses a hydrogen storage alloy purification device, which can effectively remove interstitial impurities in the alloy by utilizing the high activity of hydrogen at high temperature and under the catalytic action of hydrogen storage alloys. However, during the hydrogen purification process, metal hydride hydrogen storage materials may be poisoned by other gases (such as carbon monoxide, carbon dioxide, etc.), resulting in a gradual decrease in their hydrogen storage performance or even failure. It is crucial to study the performance changes of metal hydrides under poisoning environments in order to provide theoretical support and technical guarantee for improving the hydrogen purification process and increasing hydrogen production efficiency.

[0003] At present, the research on metal hydride poisoning faces several major problems: Existing research focuses on the changes in the hydrogen storage performance of metal hydride materials, and lacks systematic poisoning tests for the actual hydrogen purification process. Most research methods cannot simulate the complex mixed environment of hydrogen and toxic gases, resulting in test results that are difficult to truly reflect the performance of metal hydrides in actual use. Poisoning assessments mostly rely on qualitative analysis and lack quantitative standardized testing methods, making it impossible to accurately evaluate the changes in the hydrogen storage performance of metal hydrides under different poisoning conditions.

[0004] Therefore, there is an urgent need for a multi-gas mixed supply metal hydride hydrogen storage PCT (Pressure-Composition-Temperature) test device and test method that can simultaneously supply a mixture of multiple gases, accurately control the test conditions, and accurately evaluate the changes in the hydrogen storage performance of metal hydrides under different poisoning conditions. Summary of the invention

[0005] In view of this, in order to solve the problems that the existing research on metal hydride poisoning lacks systematic poisoning tests in the actual hydrogen purification process, most research methods cannot simulate the complex mixed environment of hydrogen and toxic gases, poisoning assessment mostly relies on qualitative analysis, and lacks quantitative standardized testing methods, the present invention proposes a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, comprising: Main pipeline; A gas mixing supply system, the gas mixing supply system comprises a hydrogen source, a first pressure reducing valve and a hydrogen mass flow controller connected in sequence, a carbon monoxide source, a second pressure reducing valve and a carbon monoxide mass flow controller connected in sequence, a first valve, a deoxidizer device and a dehydrator device connected in sequence, an argon source, a third pressure reducing valve and a second valve connected in sequence, and a large gas supply tank and a third valve connected, the hydrogen mass flow controller and the carbon monoxide mass flow controller are both connected to the first valve, the dehydrator device is connected to the main pipeline, the second valve is connected to the main pipeline, and the third valve is connected to the main pipeline; A small gas supply tank and a fourth valve, one end of the fourth valve is connected to the main pipeline, and the other end is connected to the small gas supply tank through a quick connector; A vacuum pump and a fifth valve, wherein two ends of the fifth valve are respectively connected to the main pipeline and the vacuum pump; The sample chamber and the sixth valve, the two ends of the sixth valve are connected to the main pipeline and the sample chamber respectively, and a hydrogen storage alloy is placed in the sample chamber; A temperature control device, used to control the temperature in the sample chamber; The monitoring and control system is used to detect and record the gas pressure in the main pipeline, control the temperature control device, and monitor the temperature in the sample chamber.

[0007] As a preferred solution of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, the sample chamber includes a reducer, a sealing ring, a peripheral sealing ring and a reaction chamber, one end of the reducer is connected to the sixth valve, and the other end is fixedly penetrated through the peripheral sealing ring, the inlet end of the reaction chamber is fixedly penetrated through the peripheral sealing ring and the reducer in sequence, the sealing ring is arranged between the reducer and the reaction chamber, and the hydrogen storage alloy is placed in the reaction chamber.

[0008] As a preferred solution of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, a filter block is fixedly installed in the reaction chamber, and the filter block is located between the hydrogen storage alloy and the inlet of the reaction chamber.

[0009] As a preferred solution of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, the temperature control device includes a heat preservation body, a heating ring, and a cooling tube. The heat preservation body is provided with a containing cavity, the reaction chamber is located in the containing cavity, the heating ring is arranged between the reaction chamber and the inner wall of the heat preservation body, the cooling tube surrounds the outer wall of the reaction chamber, and the outer sealing ring is embedded in the heat preservation body.

[0010] As a preferred solution of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, the monitoring and control system includes a computer, a pressure sensor and a thermocouple. The pressure sensor is used to detect the gas pressure in the main pipeline, and the thermocouple is used to monitor the temperature in the sample chamber. The vacuum pump, pressure sensor, thermocouple and the temperature control device are all electrically connected to the computer.

[0011] As a preferred solution of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, the gas mixed supply system also includes a connected carbon dioxide gas source and a carbon dioxide gas mass flow controller, and / or a connected nitrogen gas source and a nitrogen gas mass flow controller, and the carbon dioxide gas mass flow controller and / or the nitrogen gas mass flow controller are connected to the first valve.

[0012] As a preferred solution of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, the multi-gas mixed supply type metal hydride hydrogen storage PCT testing device also includes a safety valve, and the safety valve is connected to the main pipeline.

[0013] The present invention also provides a multi-gas mixed supply type metal hydride hydrogen storage PCT testing method, using the multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, comprising: S1: Perform volume calibration operation to obtain the ratio k, k=(V 1 +V 2 ) / V 1 , where V 1 V is the sum of the volume of the small gas supply tank and the volume of the pipeline from the small gas supply tank to the sample chamber; 2 The volume of the sample chamber minus the volume of the hydrogen storage alloy; S2: Hydrogen absorption poisoning test, to analyze the poisoning of hydrogen storage alloys; S3: Hydrogen desorption poisoning test, to analyze the poisoning of hydrogen storage alloys; S4: Repeat S2 and S3 to evaluate the cycle life and performance stability of the hydrogen storage alloy; The hydrogen absorption poisoning test includes: S201: Setting a first pressure reducing valve, a second pressure reducing valve, a hydrogen mass flow controller, and a carbon monoxide mass flow controller according to a desired gas mixing ratio; S202: Open the first valve and the fourth valve, and hydrogen and carbon monoxide enter the small gas supply tank; S203: When the readings of the hydrogen mass flow controller and the carbon monoxide mass flow controller are both stable, the fourth valve is closed and the third valve is opened, and the hydrogen and carbon monoxide are mixed according to the required gas mixing ratio, and the mixed gas formed by the mixture of hydrogen and carbon monoxide enters and is stored in the large gas supply tank; S204: When the pressure in the large gas supply tank reaches the set pressure, the first valve and the third valve are closed; S205: Open the fourth valve and the fifth valve, turn on the vacuum pump, and exhaust the gas in the small gas supply tank; S206: When the gas pressure in the main pipeline is maintained at 0.001 MPa for 5 minutes, close all valves and vacuum pumps; S207: Open the third valve and the fourth valve, and the mixed gas in the large gas supply tank enters the small gas supply tank; S208: When the pressure in the small gas supply tank reaches the pressure required for the test P 11 After that, close the third valve and the fourth valve and record the required pressure P 11 ; S209: The monitoring and control system controls the temperature control device by setting a program so that the sample chamber reaches the temperature T required for the hydrogen absorption test. 1 ; S210: When the temperature in the sample chamber reaches the temperature T required for the hydrogen absorption test 1 After the first set time has passed, the fourth valve and the sixth valve are opened, and the mixed gas in the small gas supply tank enters the sample chamber to react with the hydrogen storage alloy; S211: Real-time monitoring of the temperature in the sample chamber, and maintaining the temperature of the sample chamber at the temperature T required for the hydrogen absorption test through the temperature control device 1 ; S212: Real-time monitoring of the gas pressure in the main pipeline, recording the hydrogen absorption measurement pressure P every second set time t1 ; S213: Close all valves, open the quick connector, and measure the ratio of hydrogen to carbon monoxide in the small gas supply tank by mass spectrometry. 1 / b 1 ; S214: According to the required pressure P 11 , Hydrogen absorption measurement pressure P t1 , ratio a 1 / b 1 , ratio k and ideal gas state equation, calculate the hydrogen storage capacity of hydrogen storage alloy, according to the required pressure P 11 , multiple hydrogen absorption measurement pressure P t1 , ratio a 1 / b1 , ratio k and ideal gas state equation, calculate the curve of hydrogen storage capacity of hydrogen storage alloy changing with time, and analyze the poisoning of hydrogen storage alloy.

[0014] As a preferred solution of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT test method, the volume calibration operation includes: S101: After the hydrogen storage alloy is filled in the sample chamber, the third pressure reducing valve is set to 1MPa, and then the second valve and the third valve are opened to fill argon gas into the large gas supply tank. When the gas pressure in the main pipeline remains unchanged, all valves are closed; S102: Open the third valve and the fourth valve to inflate the small gas supply tank through the large gas supply tank; S103: When the pressure in the small gas supply tank reaches 0.1MPa+n×0.1MPa, where n is the number of times the small gas supply tank (2) is charged, the third valve and the fourth valve are closed. When the gas pressure in the main pipeline is stable, the first measured value P of the gas pressure in the main pipeline is recorded. 1 ; S104: Open the sixth valve, wait for the gas pressure in the main pipeline to stabilize, and then record the second measured value P of the gas pressure in the main pipeline. 2 ; S105: close the fourth valve, open the fifth valve, start the vacuum pump, exhaust the gas in the sample chamber through the vacuum pump, turn off the vacuum pump, and close all valves; S106: Repeat S102 to S105 to obtain multiple sets of first measurement values ​​P 1 and the second measured value P 2 ; S107: Based on multiple sets of first measurement values ​​P 1 and the second measured value P 2 Perform linear regression to obtain the slope k, where P 2 =kP 1 , given V 1 In this case, by k = (V 1 +V 2 ) / V 1 Get V 2 .

[0015] As a preferred embodiment of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT test method, the hydrogen decomposition poisoning test includes: S301: Turn on the vacuum pump, and open the fourth valve and the fifth valve to exhaust the gas in the small gas supply tank and the main pipeline; S302: When the gas pressure in the main pipeline is maintained at 0.001 MPa for 5 minutes, close all valves and vacuum pumps; S303: The monitoring and control system controls the temperature control device by setting a program so that the sample chamber reaches the temperature T required for the hydrogen release test. 2 ; S304: When the temperature in the sample chamber reaches the required temperature T for hydrogen release test 2 After the third set time has passed, the fourth valve and the sixth valve are opened; S305: Real-time monitoring of the temperature in the sample chamber, and maintaining the temperature of the sample chamber at the required temperature T for hydrogen release testing through a temperature control device 2 ; S306: Real-time monitoring of the gas pressure in the main pipeline, recording the hydrogen release measurement pressure P every fourth set time t2 ; S307: When the gas pressure in the main pipeline is constant, close all valves, open the quick connector, and measure the ratio of hydrogen to carbon monoxide in the small gas supply tank by mass spectrometry. 2 / b 2 ; S308: Measure the pressure P according to the hydrogen release t2 , ratio k, ratio a 2 / b 2 The ideal gas state equation is used to calculate the amount of hydrogen released by the hydrogen storage alloy. Based on multiple hydrogen release measurement pressures P t2 , ratio k, ratio a 2 / b 2 and ideal gas state equation, calculate the curve of hydrogen release amount of hydrogen storage alloy changing with time, and analyze the poisoning of hydrogen storage alloy.

[0016] Compared with the prior art, the multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method provided by the present invention have the following beneficial effects: The present invention provides a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method. The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device can realize multi-gas mixed supply, accurately control the concentration and flow rate of hydrogen and other toxic gases, simulate the environment in the actual hydrogen purification process, and thus improve the poisoning assessment accuracy of metal hydrides under different atmosphere conditions. At the same time, the device is equipped with a monitoring and control system, which can track the changes in the characteristics of metal hydrides during the hydrogen absorption process in real time, provide accurate experimental test data, and ensure the reliability of the test results. In addition, the multi-gas mixed supply type metal hydride hydrogen storage PCT testing device is easy to operate and highly safe, and can effectively improve the experimental test efficiency in the hydrogen purification process, providing important technical support for the optimization design of hydrogen storage alloys and the improvement of hydrogen purification technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary 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. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device provided by a specific embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of a sample chamber of a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device provided by a specific embodiment of the present invention; Figure 3 It is a structural schematic diagram of a temperature control device of a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device provided in a specific embodiment of the present invention.

[0018] In the figure: 1. Gas mixing supply system; 101. Hydrogen source; 102. First pressure reducing valve; 103. Hydrogen mass flow controller; 104. Carbon monoxide source; 105. Second pressure reducing valve; 106. Carbon monoxide mass flow controller; 107. Deoxidizer device; 108. Dehydrator device; 109. Argon source; 110. Third pressure reducing valve; 111. Safety valve; 112. Large gas supply tank; 113. First valve; 114. Second valve; 115. Third valve; 2. Small gas supply tank; 21. Quick connector; 3. Sample chamber; 31. Reducer; 32. Peripheral sealing ring; 33. Sealing ring; 34. Reaction chamber; 35. Filter block; 4. Temperature control device; 41. Insulation body; 42. Heating ring; 43. Cooling pipe; 5. Monitoring and control system; 51. Pressure sensor; 52. Thermocouple; 53. Computer; 6. The fourth valve; 7. Fifth valve; 8. Vacuum pump; 9. The sixth valve; 10. Main pipeline. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0023] See also Figure 1-3Description of this embodiment. The present invention provides a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method. The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device includes a main pipeline 10, a gas mixed supply system 1, a small gas supply tank 2, a fourth valve 6, a vacuum pump 8, a fifth valve 7, a sample chamber 3, a sixth valve 9, a temperature control device 4 and a monitoring and control system 5. The gas mixed supply system 1 includes a hydrogen source 101, a first pressure reducing valve 102 and a hydrogen mass flow controller 103 connected in sequence, a carbon monoxide source 104, a second pressure reducing valve 105 and a carbon monoxide mass flow controller 106 connected in sequence, a first valve 113, a deoxidizer device 107 and a dehydrator device 108 connected in sequence, an argon source 109, a third pressure reducing valve 110 and a second valve 114 connected in sequence , and the connected large gas supply tank 112 and the third valve 115, the hydrogen mass flow controller 103 and the carbon monoxide mass flow controller 106 are both connected to the first valve 113, the dehydrating agent device 108 is connected to the main pipeline 10, the second valve 114 is connected to the main pipeline 10, the third valve 115 is connected to the main pipeline 10, one end of the fourth valve 6 is connected to the main pipeline 10, and the other end is connected to the small gas supply tank 2 through the quick connector 21; the two ends of the fifth valve 7 are respectively connected to the main pipeline 10 and the vacuum pump 8; the two ends of the sixth valve 9 are respectively connected to the main pipeline 10 and the sample chamber 3, and a hydrogen storage alloy is placed in the sample chamber 3; the temperature control device 4 is used to control the temperature in the sample chamber 3; the monitoring and control system 5 is used to detect and record the gas pressure in the main pipeline 10, control the temperature control device 4, and monitor the temperature in the sample chamber 3.

[0024] The multi-gas mixed supply type metal hydride hydrogen storage PCT test device, the gas mixed supply system 1 is connected to the small gas supply tank 2 through the main pipeline 10, the gas mixed supply system 1 is used to supply gas to the small gas supply tank 2, in the gas mixed supply system 1, the volume of the large gas supply tank 112 is multiple times the volume of the small gas supply tank 2, hydrogen and carbon monoxide are mixed into the large gas supply tank 112, the large gas supply tank 112 is used to temporarily store the mixed gas, and then the large gas supply tank 112 is used to supply gas to the small gas supply tank 2 multiple times, and the small gas supply tank 2 then supplies gas to the sample chamber 3 to make the mixed gas react with the hydrogen storage alloy, so as to ensure that the gas mixing ratio of the mixed gas used to react with the hydrogen storage alloy multiple times is the same. The sample chamber 3 is connected to the main pipeline 10 through the sixth valve 9, and the sample chamber 3 is placed in the temperature control device 4, which can control the temperature of the sample chamber 3 so that the sample chamber 3 maintains the required temperature for the test, and the gas replacement is achieved by the vacuum pump 8 on the branch line. According to the ideal gas state equation, the amount of hydrogen absorbed and released by the hydrogen storage alloy can be calculated, as well as the curves of the amount of hydrogen released and absorbed over time, and the poisoning of the hydrogen storage alloy can be analyzed.

[0025] The multi-gas mixed supply type metal hydride hydrogen storage PCT test device can realize multi-gas mixed supply, accurately control the concentration and flow rate of hydrogen and other toxic gases, simulate the environment in the actual hydrogen purification process, and thus improve the accuracy of poisoning assessment of metal hydrides under different atmosphere conditions. At the same time, the device is equipped with a monitoring and control system 5, which can track the changes in the characteristics of metal hydrides during the hydrogen absorption process in real time, provide accurate experimental test data, and ensure the reliability of the test results. In addition, the multi-gas mixed supply type metal hydride hydrogen storage PCT test device is easy to operate and highly safe, and can effectively improve the experimental test efficiency in the hydrogen purification process, providing important technical support for the optimization design of hydrogen storage alloys and the improvement of hydrogen purification technology.

[0026] Optionally, the sample chamber 3 includes a reducer 31, a sealing ring 33, a peripheral sealing ring 32 and a reaction chamber 34, one end of the reducer 31 is connected to the sixth valve 9, and the other end is fixedly penetrated in the peripheral sealing ring 32, the inlet end of the reaction chamber 34 is fixedly penetrated in the peripheral sealing ring 32 and the reducer 31 in sequence, the sealing ring 33 is arranged between the reducer 31 and the reaction chamber 34, and the hydrogen storage alloy is placed in the reaction chamber 34. Specifically, the reducer 31 is provided with an external thread, and the peripheral sealing ring 32 is provided with an internal thread, and the reducer 31 is fixedly penetrated in the peripheral sealing ring 32 by screwing the external thread and the internal thread. The sealing ring 33 is arranged in the reducer 31, and the sealing ring 33 is used to seal the gap between the reducer 31 and the reaction chamber 34. The sealing ring 33 and the peripheral sealing ring 32 are arranged to ensure the sealing of the reaction chamber 34 and prevent gas leakage.

[0027] Optionally, a filter block 35 is fixedly disposed in the reaction chamber 34, and the filter block 35 is located between the hydrogen storage alloy and the inlet of the reaction chamber 34. The filter block 35 is built into the reaction chamber 34 to prevent hydrogen storage alloy powder from entering the main pipeline 10, thereby ensuring the normal operation of the device.

[0028] Optionally, the temperature control device 4 includes a heat preservation body 41, a heating ring 42, and a cooling tube 43. The heat preservation body 41 is provided with a receiving cavity, the reaction chamber 34 is located in the receiving cavity, the heating ring 42 is arranged between the reaction chamber 34 and the inner wall of the heat preservation body 41, the cooling tube 43 surrounds the outer wall of the reaction chamber 34, and the peripheral sealing ring 32 is embedded in the heat preservation body 41. The heating ring 42 is used to heat the sample chamber 3; the cooling tube 43 is used to reduce the temperature of the sample chamber 3 to a specific temperature, and the cooling medium in the cooling tube 43 flows in from the lower end and flows out from the upper end through the cooling tube 43. The receiving cavity is located at the center of the heat preservation body 41 and extends along the axial direction of the heat preservation body 41. The sample chamber 3 is inserted from one end of the receiving cavity. After insertion, it is tightly combined with the opening of the receiving cavity through the peripheral sealing ring 32, that is, the peripheral sealing ring 32 is embedded in the heat preservation body 41 to ensure the sealing performance. The thermocouple 52 is inserted from the other end of the receiving cavity and placed at the bottom of the reaction chamber 34.

[0029] Optionally, the monitoring and control system 5 includes a computer 53, a pressure sensor 51 and a thermocouple 52, wherein the pressure sensor 51 is used to detect the gas pressure of the main pipeline 10, and the thermocouple 52 is used to monitor the temperature in the sample chamber 3. The vacuum pump 8, the pressure sensor 51, the thermocouple 52 and the temperature control device 4 are all electrically connected to the computer 53. The thermocouple 52 is used to monitor the temperature of the reaction chamber 34 and feed back the temperature signal. The computer 53 adjusts the heating power of the heating ring 42 or the flow rate of the cooling medium according to the temperature change of the reaction chamber 34 to maintain a constant temperature of the reaction chamber 34. The pressure sensor 51 is used to detect the gas pressure of the main pipeline 10 and transmit the pressure signal to the computer 53.

[0030] Optionally, the gas mixed with hydrogen in the gas mixing supply system 1 can also be set to carbon dioxide or nitrogen, a carbon dioxide gas source and a carbon dioxide gas mass flow controller, and / or a connected nitrogen source and a nitrogen mass flow controller, and the carbon dioxide gas mass flow controller and / or the nitrogen mass flow controller are connected to the first valve 113. The nitrogen mass flow controller and the carbon dioxide gas mass flow controller can freely switch the gas source and adjust the corresponding flow and quality according to demand to achieve accurate gas mixing and flow control.

[0031] Optionally, the multi-gas mixed supply type metal hydride hydrogen storage PCT testing device further includes a safety valve 111 , which is connected to the main pipeline 10 .

[0032] The present invention also provides a multi-gas mixed supply type metal hydride hydrogen storage PCT test method, using the multi-gas mixed supply type metal hydride hydrogen storage PCT test device, the multi-gas mixed supply type metal hydride hydrogen storage PCT test method comprises: S1: Perform volume calibration operation to obtain the ratio k, k=(V 1 +V 2 ) / V 1 , where V 1 V is the sum of the volume of the small gas supply tank 2 and the volume of the pipeline from the small gas supply tank 2 to the sample chamber 3; 2 = k = (V 1 +V 2 ) / V 1 , V 1 V is the sum of the volume of the small gas supply tank 2 and the volume of the pipeline from the small gas supply tank 2 to the sample chamber 3. 1 If the value of is known, then we can calculate the value of k and V 1 , calculate the volume V of the space remaining after the hydrogen storage alloy is stored in the sample chamber 3 2, making the subsequent calculations of the hydrogen storage and hydrogen absorption amounts of hydrogen storage alloys more accurate.

[0033] S2: Hydrogen absorption poisoning test, to analyze the poisoning of hydrogen storage alloys; S3: Hydrogen desorption poisoning test, to analyze the poisoning of hydrogen storage alloys; S4: Repeat S2 and S3 to evaluate the cycle life and performance stability of the hydrogen storage alloy. According to the hydrogen absorption and desorption poisoning test steps, multiple tests can be performed to evaluate the cycle life and performance stability of the hydrogen storage alloy.

[0034] Optionally, the volume calibration operation includes: S101: After the hydrogen storage alloy is filled in the sample chamber 3, the third pressure reducing valve 110 is set to 1 MPa, and then the second valve 114 and the third valve 115 are opened to fill argon gas into the large gas supply tank 112. When the gas pressure in the main pipeline 10 remains unchanged, all valves are closed; S102: Open the third valve 115 and the fourth valve 6 to inflate the small gas supply tank 2 through the large gas supply tank 112; S103: When the pressure in the small gas supply tank 2 reaches 0.1MPa+n×0.1MPa, where n is the number of times the small gas supply tank 2 is charged, the third valve 115 and the fourth valve 6 are closed. When the gas pressure in the main pipeline 10 is stable, the first measured value P of the gas pressure in the main pipeline 10 is recorded. 1 ; S104: Open the sixth valve 9, wait for the gas pressure in the main pipeline 10 to stabilize, and then record the second measured value P of the gas pressure in the main pipeline 10 2 ; S105: close the fourth valve 6, open the fifth valve 7, start the vacuum pump 8, exhaust the gas in the sample chamber 3 through the vacuum pump 8, turn off the vacuum pump 8, and close all valves; S106: Repeat S102 to S105 to obtain multiple sets of first measurement values ​​P 1 and the second measured value P 2 ; S107: Based on multiple sets of first measurement values ​​P 1 and the second measured value P 2 Perform linear regression to obtain the slope k, where P 2 =kP 1 , k = (V 1 +V 2 ) / V 1 , it is known that V 1 In the case of V 2 value.

[0035] In some preferred embodiments, the third valve 115 and the fourth valve 6 are repeatedly opened multiple times, the small gas supply tank 2 is inflated through the large gas supply tank 112, the third valve 115 and the fourth valve 6 are closed, and the first measurement value P of the pressure sensor 51 is recorded. 1 Open the sixth valve 9, and record the second measured value P after the measured value of the pressure sensor 51 stabilizes 2 ; According to this step, obtain multiple sets of first measurement values ​​P 1 and the second measured value P 2 ; Based on multiple sets of first measurement values ​​P 1 and the second measured value P 2 Perform linear regression to obtain the slope k.

[0036] Specifically, open the third valve 115 and the fourth valve 6 to inflate the small gas supply tank 2 through the large gas supply tank 112 to 0.1 MPa, close the third valve 115, and after the measured value of the pressure sensor 51 stabilizes, record the first measured value P 1 Then open the sixth valve 9, wait for the measured value of the pressure sensor 51 to stabilize, and then record the second measured value P 2 Then, close the fourth valve 6, exhaust the gas in the sample chamber 3 through the vacuum pump 8, turn off the vacuum pump 8, and close all valves; open the third valve 115 and the fourth valve 6 to inflate the small gas supply tank 2 to 0.2MPa again, close the third valve 115, and after the measured value of the pressure sensor 51 is stable, record the first measured value P 1 Then open the sixth valve 9, wait for the measured value of the pressure sensor 51 to stabilize, and then record the second measured value P 2 Then, close the fourth valve 6, exhaust the gas in the sample chamber 3 through the vacuum pump 8, turn off the vacuum pump 8, and close all valves; then, repeat the operation, pressurize the small gas supply tank 2 to 0.3 MPa, 0.4 MPa and 0.5 MPa in turn; obtain five sets of first measurement values ​​P 1 and the second measured value P 2 , linear regression is performed on these five sets of data, and P 2 =kP 1 Since k = (V 1 +V 2 ) / V 1 , then according to k and V 1 , calculate the volume V of the space remaining after the hydrogen storage alloy is stored in the sample chamber 3 2 , making the subsequent calculations of the hydrogen storage and hydrogen absorption amounts of hydrogen storage alloys more accurate.

[0037] The hydrogen absorption poisoning test includes: S201: according to the required gas mixing ratio, the first pressure reducing valve 102, the second pressure reducing valve 105, the hydrogen mass flow controller 103 and the carbon monoxide mass flow controller 106 are set; S202: Open the first valve 113 and the fourth valve 6, and hydrogen and carbon monoxide enter the small gas supply tank 2; S203: When the readings of the hydrogen mass flow controller 103 and the carbon monoxide mass flow controller 106 are both stable, the fourth valve 6 is closed, and the third valve 115 is opened, and the hydrogen and carbon monoxide are mixed according to the required gas mixing ratio, and the mixed gas formed by the mixture of hydrogen and carbon monoxide enters and is stored in the large gas supply tank 112; S204: When the pressure in the large gas supply tank 112 reaches the set pressure, the first valve 113 and the third valve 115 are closed; S205: Open the fourth valve 6 and the fifth valve 7, turn on the vacuum pump 8, and the vacuum pump 8 evacuates the gas in the small gas supply tank 2; S206: When the gas pressure in the main pipeline 10 is maintained at 0.001 MPa for 5 minutes, all valves and the vacuum pump 8 are closed; S207: Open the third valve 115 and the fourth valve 6, and the mixed gas in the large gas supply tank 112 enters the small gas supply tank 2; S208: When the pressure in the small gas supply tank 2 reaches the pressure P required for the test 11 After that, close the third valve 115 and the fourth valve 6, and record the required pressure P 11 ; S209: The monitoring and control system 5 controls the temperature control device 4 by setting a program so that the sample chamber 3 reaches the temperature T required for the hydrogen absorption test. 1 ; S210: When the temperature in the sample chamber 3 reaches the temperature T required for the hydrogen absorption test 1 After the first set time has passed, the fourth valve 6 and the sixth valve 9 are opened, and the mixed gas in the small gas supply tank 2 enters the sample chamber 3 to react with the hydrogen storage alloy; S211: Real-time monitoring of the temperature in the sample chamber 3, and maintaining the temperature of the sample chamber 3 at the temperature T required for the hydrogen absorption test through the temperature control device 4 1 ; S212: Real-time monitoring of the gas pressure in the main pipeline 10, recording the hydrogen absorption measurement pressure P every second set time t1 ; S213: Close all valves, open quick connector 21, and measure the ratio of hydrogen to carbon monoxide in the small gas supply tank 2 by mass spectrometry. 1 / b 1 ; S214: According to the required pressure P 11 , Hydrogen absorption measurement pressure Pt1 , ratio a 1 / b 1 , ratio k and ideal gas state equation, calculate the hydrogen storage capacity of hydrogen storage alloy; according to the required pressure P 11 , multiple hydrogen absorption measurement pressure P t1 , ratio a 1 / b 1 , ratio k and ideal gas state equation, calculate the curve of hydrogen storage capacity of hydrogen storage alloy changing with time, and analyze the poisoning of hydrogen storage alloy.

[0038] Specifically, according to the required pressure P 11 , Hydrogen absorption measurement pressure P t1 , ratio a 1 / b 1 , ratio k and ideal gas state equation, calculate the hydrogen storage capacity of hydrogen storage alloy, including: hydrogen storage capacity of hydrogen storage alloy , where m is the mass of the hydrogen storage alloy in the sample chamber 3; n 2 is the amount of gas filled into the sample chamber 3, n 2 =P 11 V 1 / RT 1 ;n 3 is the amount of gas remaining in the pipeline between the small gas supply tank 2 and the sample chamber 3 and the small gas supply tank 2, n 3 =P t1 (V 1 +V 2 ) / RT 1 ; R is the gas constant, T 1 is the preset temperature threshold, i.e. the temperature required for hydrogen absorption test; according to k and V 1 , calculate the volume V of the space remaining after the hydrogen storage alloy is stored in the sample chamber 2 .

[0039] According to the required pressure P 11 , multiple hydrogen absorption measurement pressure P t1 , ratio a 1 / b 1 , ratio k and ideal gas state equation, calculate the curve of hydrogen storage capacity wt.% of hydrogen storage alloy changing with time, that is, record the measured pressure P every second set time during the hydrogen absorption poisoning process. t1 , get multiple P t1 , and calculate the hydrogen storage amount wt.% of the hydrogen storage alloy at the corresponding time, and then obtain the curve of the hydrogen storage amount wt.% of the hydrogen storage alloy changing with time.

[0040] Optionally, in S201, the first pressure reducing valve 102 and the second pressure reducing valve 105 are set to the same pressure required for the test, and then the parameters of the hydrogen mass flow controller 103 and the carbon monoxide mass flow controller 106 are adjusted according to the mass ratio of the required mixed gas. Specifically, assuming that the test needs to simulate a mixed gas with a mass ratio of hydrogen to carbon monoxide of a:b for hydrogen absorption test or hydrogen release test, set m H is the hydrogen mass flow rate (g / min), set m CO is the mass flow rate of carbon monoxide (g / min), M H and M CO are the molar masses of hydrogen and carbon monoxide (g / mol), V H and V CO They are the volume flow rates of hydrogen and carbon monoxide (SL / min), and according to the mass ratio a:b, the mass flow rate relationship can be obtained:

[0041] mean , the mass flow is converted into volume flow through the relationship between molar mass and gas flow (the volume of 1 mol of gas in standard state is 22.424 L):

[0042]

[0043] Substituting the above relationship between mass flow and volume flow into the formula of mass ratio, we get:

[0044] According to V H and V CO The ratio of is used to set the parameters of the hydrogen mass flow controller and the carbon monoxide mass flow controller.

[0045] The hydrogen degassing poisoning test includes: S301: Turn on the vacuum pump 8, and open the fourth valve 6 and the fifth valve 7 to exhaust the gas in the small gas supply tank 2 and the main pipeline 10; S302: When the gas pressure in the main pipeline 10 is maintained at 0.001 MPa for 5 minutes, all valves and the vacuum pump 8 are closed; S303: The monitoring and control system 5 controls the temperature control device 4 by setting a program so that the sample chamber 3 reaches the temperature T required for the hydrogen release test. 2 ; S304: When the temperature in the sample chamber 3 reaches the required temperature T for hydrogen release test 2 After the third set time has passed, the fourth valve 6 and the sixth valve 9 are opened; S305: Real-time monitoring of the temperature in the sample chamber 3, and maintaining the temperature of the sample chamber 3 at the required temperature T for the hydrogen release test through the temperature control device 4 2 ; S306: Real-time monitoring of the gas pressure of the main pipeline 10, recording the hydrogen release measurement pressure P every fourth set time t2 , until the hydrogen degassing poisoning test is completed; S307: When the gas pressure in the main pipeline 10 is constant, close all valves, open the quick connector 21, and measure the ratio of hydrogen to carbon monoxide in the small gas supply tank 2 by mass spectrometry. 2 / b 2 ; S308: Measure the pressure P according to the hydrogen release t2 , ratio k, ratio a 2 / b 2 The ideal gas state equation is used to calculate the amount of hydrogen released by the hydrogen storage alloy. Based on multiple hydrogen release measurement pressures P t2 , ratio k, ratio a 2 / b 2 and ideal gas state equation, calculate the curve of hydrogen release amount of hydrogen storage alloy changing with time, and analyze the poisoning of hydrogen storage alloy.

[0046] During the hydrogen release poisoning test, first open the vacuum pump 8, and then open the fourth valve 6 and the fifth valve 7 in sequence to discharge the gas in the small gas supply tank 2 and the pipeline. When the pressure sensor 51 maintains 0.001MPa for 5 minutes, close all valves and the vacuum pump 8 to prepare for the hydrogen release poisoning test. Open the fourth valve 6 and the sixth valve 9 in sequence, and the pressure sensor 51 records the pressure P at intervals. t2 Until the hydrogen release poisoning test is over, close all valves, separate the pipeline quick connector 21, measure the ratio of hydrogen to carbon monoxide in the small gas supply tank 2 by mass spectrometry, and calculate the amount of hydrogen released by the same calculation principle as in the hydrogen absorption poisoning process.

[0047] Obviously, the embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. It is not necessary and impossible to exhaustively list all the embodiments here.

Claims

1. A multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, characterized in that: include: Main pipeline (10); A gas mixing supply system (1), the gas mixing supply system (1) comprising a hydrogen source (101), a first pressure reducing valve (102) and a hydrogen mass flow controller (103) connected in sequence, a carbon monoxide source (104), a second pressure reducing valve (105) and a carbon monoxide mass flow controller (106) connected in sequence, a first valve (113), a deoxidizer device (107) and a dehydrator device (108) connected in sequence, an argon source (109), a third pressure reducing valve (110) and a second valve (114) connected in sequence, and a large gas supply tank (112) and a third valve (115) connected, the hydrogen mass flow controller (103) and the carbon monoxide mass flow controller (106) are both connected to the first valve (113), the dehydrator device (108) is connected to the main pipeline (10), the second valve (114) is connected to the main pipeline (10), and the third valve (115) is connected to the main pipeline (10); A small gas supply tank (2) and a fourth valve (6), one end of the fourth valve (6) is connected to the main pipeline (10), and the other end is connected to the small gas supply tank (2) via a quick connector (21); A vacuum pump (8) and a fifth valve (7), wherein two ends of the fifth valve (7) are respectively connected to the main pipeline (10) and the vacuum pump (8); A sample chamber (3) and a sixth valve (9), wherein two ends of the sixth valve (9) are respectively connected to the main pipeline (10) and the sample chamber (3), and a hydrogen storage alloy is placed in the sample chamber (3); A temperature control device (4) for controlling the temperature in the sample chamber (3); The monitoring and control system (5) is used to detect and record the gas pressure in the main pipeline (10), control the temperature control device (4), and monitor the temperature in the sample chamber (3).

2. The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device according to claim 1, characterized in that: The sample chamber (3) comprises a reducer (31), a sealing ring (33), a peripheral sealing ring (32) and a reaction chamber (34); one end of the reducer (31) is connected to the sixth valve (9), and the other end is fixedly penetrated through the peripheral sealing ring (32); the inlet end of the reaction chamber (34) is fixedly penetrated through the peripheral sealing ring (32) and the reducer (31) in sequence; the sealing ring (33) is arranged between the reducer (31) and the reaction chamber (34); and the hydrogen storage alloy is placed in the reaction chamber (34).

3. The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device according to claim 2, characterized in that: A filter block (35) is fixedly arranged in the reaction chamber (34), and the filter block (35) is located between the hydrogen storage alloy and the inlet of the reaction chamber (34).

4. The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device according to claim 2, characterized in that: The temperature control device (4) comprises a heat preservation body (41), a heating ring (42), and a cooling tube (43); the heat preservation body (41) is provided with a containing cavity, the reaction chamber (34) is located in the containing cavity, the heating ring (42) is arranged between the reaction chamber (34) and the inner wall of the heat preservation body (41), the cooling tube (43) surrounds the outer wall of the reaction chamber (34), and the outer sealing ring (32) is embedded in the heat preservation body (41).

5. The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device according to claim 1, characterized in that: The monitoring and control system (5) comprises a computer (53), a pressure sensor (51) and a thermocouple (52), wherein the pressure sensor (51) is used to detect the gas pressure of the main pipeline (10), and the thermocouple (52) is used to monitor the temperature in the sample chamber (3). The vacuum pump (8), the pressure sensor (51), the thermocouple (52) and the temperature control device (4) are all electrically connected to the computer (53).

6. The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device according to claim 1, characterized in that: The gas mixing supply system (1) further comprises a connected carbon dioxide gas source and a carbon dioxide gas mass flow controller, and / or a connected nitrogen gas source and a nitrogen gas mass flow controller, and the carbon dioxide gas mass flow controller and / or the nitrogen gas mass flow controller are connected to the first valve (113).

7. The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device according to claim 1, characterized in that: It also includes a safety valve (111), which is connected to the main pipeline (10).

8. A multi-gas mixed supply type metal hydride hydrogen storage PCT test method, characterized in that: The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device according to any one of claims 1 to 7 comprises: S1: Perform a volume calibration operation to obtain a ratio k, k=(V1+V2) / V1, wherein V1 is the sum of the volume of the small gas supply tank (2) and the volume of the pipeline between the small gas supply tank (2) and the sample chamber (3); V2 is the volume of the sample chamber (3) minus the volume of the hydrogen storage alloy; S2: Hydrogen absorption poisoning test, to analyze the poisoning of hydrogen storage alloys; S3: Hydrogen desorption poisoning test, to analyze the poisoning of hydrogen storage alloys; S4: Repeat S2 and S3 to evaluate the cycle life and performance stability of the hydrogen storage alloy; The hydrogen absorption poisoning test includes: S201: according to the required gas mixing ratio, a first pressure reducing valve (102), a second pressure reducing valve (105), a hydrogen mass flow controller (103) and a carbon monoxide mass flow controller (106) are set; S202: Open the first valve (113) and the fourth valve (6), and hydrogen and carbon monoxide enter the small gas supply tank (2); S203: When the readings of the hydrogen mass flow controller (103) and the carbon monoxide mass flow controller (106) are both stable, the fourth valve (6) is closed and the third valve (115) is opened, and the hydrogen and carbon monoxide are mixed according to the required gas mixing ratio, and the mixed gas formed by the mixture of hydrogen and carbon monoxide enters and is stored in the large gas supply tank (112); S204: When the pressure in the large gas supply tank (112) reaches the set pressure, the first valve (113) and the third valve (115) are closed; S205: Open the fourth valve (6) and the fifth valve (7), start the vacuum pump (8), and exhaust the gas in the small gas supply tank (2) with the vacuum pump (8); S206: When the gas pressure in the main pipeline (10) is maintained at 0.001 MPa for 5 min, all valves and the vacuum pump (8) are closed; S207: Open the third valve (115) and the fourth valve (6), and the mixed gas in the large gas supply tank (112) enters the small gas supply tank (2); S208: When the pressure in the small gas supply tank (2) reaches the pressure required for the test, 11 After that, close the third valve (115) and the fourth valve (6) and record the required pressure P 11 ; S209: The monitoring and control system (5) controls the temperature control device (4) by setting a program so that the sample chamber (3) reaches the temperature T1 required for the hydrogen absorption test; S210: When the temperature in the sample chamber (3) reaches the temperature T1 required for the hydrogen absorption test and lasts for a first set time, the fourth valve (6) and the sixth valve (9) are opened, and the mixed gas in the small gas supply tank (2) enters the sample chamber (3) to react with the hydrogen storage alloy; S211: monitoring the temperature in the sample chamber (3) in real time, and maintaining the temperature of the sample chamber (3) at a temperature T1 required for the hydrogen absorption test through a temperature control device (4); S212: Real-time monitoring of the gas pressure of the main pipeline (10), recording the hydrogen absorption measurement pressure P every second set time t1 ; S213: Close all valves, open the quick connector (21), and measure the ratio a1 / b1 of hydrogen and carbon monoxide in the small gas supply tank (2) by mass spectrometry; S214: According to the required pressure P 11 , Hydrogen absorption measurement pressure P t1 , ratio a1 / b1, ratio k and ideal gas state equation, calculate the hydrogen storage capacity of hydrogen storage alloy, according to the required pressure P 11 , multiple hydrogen absorption measurement pressure P t1 , ratio a1 / b1, ratio k and ideal gas state equation, calculate the curve of hydrogen storage capacity of hydrogen storage alloy changing with time, and analyze the poisoning of hydrogen storage alloy.

9. The PCT testing method for metal hydride hydrogen storage using a multi-gas mixed supply method according to claim 8, characterized in that: The volume calibration operation includes: S101: After the hydrogen storage alloy is filled in the sample chamber (3), the third pressure reducing valve (110) is set to 1 MPa, and then the second valve (114) and the third valve (115) are opened to fill argon gas into the large gas supply tank (112). When the gas pressure in the main pipeline (10) remains unchanged, all valves are closed; S102: Open the third valve (115) and the fourth valve (6), and inflate the small gas supply tank (2) through the large gas supply tank (112); S103: When the pressure in the small gas supply tank (2) reaches 0.1 MPa+n×0.1 MPa, where n is the number of times the small gas supply tank (2) is charged, the third valve (115) and the fourth valve (6) are closed, and when the gas pressure in the main pipeline (10) is stabilized, a first measured value P1 of the gas pressure in the main pipeline (10) is recorded; S104: opening the sixth valve (9), and recording a second measured value P2 of the gas pressure in the main pipeline (10) after the gas pressure in the main pipeline (10) is stabilized; S105: close the fourth valve (6), open the fifth valve (7), start the vacuum pump (8), exhaust the gas in the sample chamber (3) through the vacuum pump (8), turn off the vacuum pump (8), and close all valves; S106: Repeat S102 to S105 to obtain multiple groups of first measurement values ​​P1 and second measurement values ​​P2; S107: Perform linear regression based on multiple groups of first measurement values ​​P1 and second measurement values ​​P2 to obtain a slope k, where P2=kP1. ​​When V1 is known, V2 is calibrated by k=(V1+V2) / V1.

10. The PCT testing method for metal hydride hydrogen storage using multiple gas mixed supply according to claim 8, characterized in that: The hydrogen degassing poisoning test includes: S301: Turn on the vacuum pump (8), and open the fourth valve (6) and the fifth valve (7) to exhaust the gas in the small gas supply tank (2) and the main pipeline (10); S302: When the gas pressure in the main pipeline (10) is maintained at 0.001 MPa for 5 min, all valves and the vacuum pump (8) are closed; S303: The monitoring and control system (5) controls the temperature control device (4) by setting a program so that the sample chamber (3) reaches the temperature T2 required for the hydrogen release test; S304: when the temperature in the sample chamber (3) reaches the temperature T2 required for the hydrogen release test and lasts for a third set time, the fourth valve (6) and the sixth valve (9) are opened; S305: real-time monitoring of the temperature in the sample chamber (3), and maintaining the temperature of the sample chamber (3) at a temperature T2 required for the hydrogen release test through a temperature control device (4); S306: Real-time monitoring of the gas pressure of the main pipeline (10), recording the hydrogen release measurement pressure P every fourth set time t2 ; S307: When the gas pressure in the main pipeline (10) becomes constant, all valves are closed, the quick connector (21) is opened, and the ratio a2 / b2 of hydrogen and carbon monoxide in the small gas supply tank (2) is measured by mass spectrometry; S308: Measure the pressure P according to the hydrogen release t2 , ratio k, ratio a2 / b2 and ideal gas state equation, calculate the amount of hydrogen released by the hydrogen storage alloy, and measure the pressure P according to multiple dehydrogenation measurements. t2 , ratio k, ratio a2 / b2 and ideal gas state equation, calculate the curve of hydrogen release amount of hydrogen storage alloy changing with time, and analyze the poisoning of hydrogen storage alloy.

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