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

Abstract

The present invention proposes a multi-gas mixed-supply metal hydride hydrogen storage PCT testing device and method, belonging to the technical field of hydrogen storage material performance testing. In this device, the hydrogen and carbon monoxide sources in the gas mixed supply system are respectively connected to the main pipeline through corresponding pressure reducing valves and mass flow controllers, and then through a first valve, a deoxidizer device, and a dehydrator device. The argon source is connected to the main pipeline through a pressure reducing valve and a second valve for volume calibration. The large gas supply tank is connected to the main pipeline through a third valve, and the small gas supply tank is connected to the main pipeline through a quick connector and a fourth valve. The vacuum pump is connected to the main pipeline through a fifth valve. The sample chamber contains a hydrogen storage alloy and is connected to the main pipeline through a sixth valve. A temperature control device is installed outside the sample chamber. The monitoring and control system is used to detect and record gas pressure changes and control and monitor the temperature of the sample chamber. This device can accurately evaluate the changes in the hydrogen storage performance of hydrogen storage alloys under different poisoning conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen storage material performance testing, 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 clean energy carrier, hydrogen has been widely used in various fields. However, current hydrogen production processes, especially those using coke oven gas and other sources, often mix with other toxic gases (such as carbon monoxide), posing challenges to hydrogen purity. To ensure high hydrogen purity, efforts have been made to purify hydrogen using the hydrogen absorption properties of hydrogen storage materials. These materials react only with hydrogen to form metal hydrides under certain temperature and pressure conditions. Patent No. CN108220633A discloses a hydrogen storage alloy purification device that effectively removes interstitial impurities from the alloy by leveraging the high activity of hydrogen at high temperatures and the catalytic activity of hydrogen storage alloys. However, during the hydrogen purification process, metal hydride hydrogen storage materials can be poisoned by other gases (such as carbon monoxide and carbon dioxide), causing their hydrogen storage performance to gradually degrade or even fail. Studying the performance changes of metal hydrides in toxic environments is crucial to provide theoretical and technical support for improving hydrogen purification processes and increasing hydrogen production efficiency.

[0003] Currently, research on metal hydride poisoning faces several major challenges: Existing studies primarily focus on changes in the hydrogen storage properties of metal hydride materials, lacking systematic poisoning testing specific to actual hydrogen purification processes. Most research methods are unable to simulate the complex mixing environment of hydrogen and toxic gases, resulting in test results that fail to truly reflect the performance of metal hydrides in actual use. Poisoning assessments often rely on qualitative analysis, lacking quantitative, standardized testing methods, making it impossible to accurately assess changes in the hydrogen storage properties of metal hydrides under varying poisoning conditions.

[0004] Therefore, there is an urgent need for a multi-gas mixed supply metal hydride hydrogen storage PCT (Pressure-Composition-Temperature) testing device and testing method that can simultaneously supply a mixture of multiple gases, precisely 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 testing in the actual hydrogen purification process, most research methods cannot simulate the complex mixed environment of hydrogen and toxic gases, and 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:

[0007] A multi-gas mixed supply type metal hydride hydrogen storage PCT testing device, comprising:

[0008] main pipeline;

[0009] A gas mixing and supply system, the gas mixing and supply system comprising 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 in sequence; 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;

[0010] 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;

[0011] a vacuum pump and a fifth valve, wherein both ends of the fifth valve are connected to the main pipeline and the vacuum pump respectively;

[0012] The sample chamber and the sixth valve, both ends of the sixth valve are connected to the main pipeline and the sample chamber respectively, and the hydrogen storage alloy is placed in the sample chamber;

[0013] A temperature control device for controlling the temperature in the sample chamber;

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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 an insulation body, a heating ring, and a cooling tube. The insulation body is provided with a accommodating cavity, the reaction chamber is located in the accommodating cavity, the heating ring is arranged between the reaction chamber and the inner wall of the insulation body, the cooling tube surrounds the outer wall of the reaction chamber, and the outer sealing ring is embedded in the insulation body.

[0018] 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.

[0019] 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.

[0020] 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, which is connected to the main pipeline.

[0021] 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 described above, comprising:

[0022] S1: Perform volume calibration to obtain the ratio k, k = (V1 + V2) / V1, where V1 is the sum of the volume of the small gas supply tank and the volume of the pipeline between the small gas supply tank and the sample chamber; V2 is the volume of the sample chamber minus the volume of the hydrogen storage alloy;

[0023] S2: Hydrogen absorption poisoning test, to analyze the poisoning of hydrogen storage alloys;

[0024] S3: Hydrogen desorption poisoning test, to analyze the poisoning of hydrogen storage alloys;

[0025] S4: Repeat S2 and S3 to evaluate the cycle life and performance stability of the hydrogen storage alloy;

[0026] The hydrogen absorption poisoning test includes:

[0027] 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;

[0028] S202: Open the first valve and the fourth valve, and hydrogen and carbon monoxide enter the small gas supply tank;

[0029] S203: When the readings of the hydrogen mass flow controller and the carbon monoxide mass flow controller are stable, the fourth valve is closed and the third valve is opened. The hydrogen and carbon monoxide are mixed according to the required gas mixing ratio, and the mixed gas formed by the hydrogen and carbon monoxide is entered and stored in the large gas supply tank;

[0030] S204: When the pressure in the large gas supply tank reaches the set pressure, the first valve and the third valve are closed;

[0031] S205: Open the fourth valve and the fifth valve, start the vacuum pump, and exhaust the gas in the small gas supply tank;

[0032] S206: When the gas pressure in the main pipeline is maintained at 0.001 MPa for 5 minutes, close all valves and vacuum pumps;

[0033] 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;

[0034] S208: When the pressure in the small gas supply tank reaches the pressure required for the test P 11 After that, close the third and fourth valves and record the required pressure P 11 ;

[0035] S209: The monitoring and control system controls the temperature control device by setting a program so that the sample chamber reaches the temperature T1 required for the hydrogen absorption test;

[0036] S210: When the temperature in the sample chamber reaches the temperature T1 required for the hydrogen absorption test and lasts for a first set time, 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;

[0037] S211: Real-time monitoring of the temperature in the sample chamber, and maintaining the temperature of the sample chamber at the temperature T1 required for the hydrogen absorption test through a temperature control device;

[0038] S212: Real-time monitoring of the gas pressure in the main pipeline, recording the hydrogen absorption measurement pressure P every second set time t1 ;

[0039] S213: Close all valves, open the quick connector, and measure the ratio a1 / b1 of hydrogen and carbon monoxide in the small gas supply tank by mass spectrometry;

[0040] 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 situation of hydrogen storage alloy.

[0041] 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:

[0042] S101: After the hydrogen storage alloy is filled in the sample chamber, the third pressure reducing valve is set to 1 MPa, and then the second and third valves are opened to fill argon into the large gas supply tank. When the gas pressure in the main pipeline remains unchanged, all valves are closed;

[0043] S102: Open the third valve and the fourth valve to inflate the small gas supply tank through the large gas supply tank;

[0044] S103: When the pressure in the small gas supply tank 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 and the fourth valve are closed. When the gas pressure in the main pipeline is stable, a first measured value P1 of the gas pressure in the main pipeline is recorded.

[0045] S104: Open the sixth valve, wait for the gas pressure in the main pipeline to stabilize, and then record a second measured value P2 of the gas pressure in the main pipeline;

[0046] S105: Close the fourth valve, open the fifth valve, start the vacuum pump, evacuate the gas in the sample chamber through the vacuum pump, turn off the vacuum pump, and close all valves;

[0047] S106: Repeat S102 to S105 to obtain multiple sets of first measurement values P1 and second measurement values P2;

[0048] S107: Perform linear regression based on multiple sets of first measurement values P1 and second measurement values P2 to obtain a slope k, where P2=kP1. When V1 is known, V2 is obtained by k=(V1+V2) / V1.

[0049] As a preferred embodiment of the above-mentioned multi-gas mixed supply type metal hydride hydrogen storage PCT test method, the hydrogen desorption poisoning test includes:

[0050] 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;

[0051] S302: When the gas pressure in the main pipeline is maintained at 0.001 MPa for 5 minutes, close all valves and vacuum pumps;

[0052] S303: The monitoring and control system controls the temperature control device by setting a program so that the sample chamber reaches the temperature T2 required for the hydrogen release test;

[0053] S304: When the temperature in the sample chamber reaches the temperature T2 required for the hydrogen release test and lasts for a third set time, the fourth valve and the sixth valve are opened;

[0054] S305: Real-time monitoring of the temperature in the sample chamber, and maintaining the temperature of the sample chamber at the temperature T2 required for the hydrogen release test through a temperature control device;

[0055] S306: Real-time monitoring of the gas pressure in the main pipeline, recording the hydrogen release pressure P every fourth set time t2 ;

[0056] S307: When the gas pressure in the main pipeline becomes constant, close all valves, open the quick connector, and measure the ratio a2 / b2 of hydrogen and carbon monoxide in the small gas supply tank by mass spectrometry;

[0057] S308: Measure pressure P based on hydrogen release t2 , ratio k, ratio a2 / b2 and ideal gas state equation, calculate the hydrogen release amount of hydrogen storage alloy, and measure the pressure P according to multiple hydrogen release 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 situation of hydrogen storage alloy.

[0058] 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:

[0059] 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 atmospheric conditions. At the same time, the device is equipped with a monitoring and control system that 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. It can effectively improve the experimental test efficiency in the hydrogen purification process and provide important technical support for the optimization design of hydrogen storage alloys and the improvement of hydrogen purification technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0061] Figure 1 1 is a schematic structural diagram of a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device provided by a specific embodiment of the present invention;

[0062] Figure 2 Schematic diagram of the structure of the sample chamber of the multi-gas mixed supply type metal hydride hydrogen storage PCT testing device provided by a specific embodiment of the present invention;

[0063] Figure 3 It is a structural schematic diagram of the temperature control device of the multi-gas mixed supply type metal hydride hydrogen storage PCT testing device provided by a specific embodiment of the present invention.

[0064] In the picture:

[0065] 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;

[0066] 2. Small gas supply tank; 21. Quick connector;

[0067] 3. Sample chamber; 31. Reducer; 32. Peripheral sealing ring; 33. Sealing ring; 34. Reaction chamber; 35. Filter block;

[0068] 4. Temperature control device; 41. Insulation body; 42. Heating ring; 43. Cooling pipe;

[0069] 5. Monitoring and control system; 51. Pressure sensor; 52. Thermocouple; 53. Computer;

[0070] 6. Fourth valve;

[0071] 7. Fifth valve;

[0072] 8. Vacuum pump;

[0073] 9. Sixth valve;

[0074] 10. Main pipeline. DETAILED DESCRIPTION

[0075] The following will be combined with the accompanying 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 therein can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0076] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0077] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0078] In the description of this embodiment, terms such as "upper," "lower," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0079] See also Figure 1-3 Description 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.

[0080] The multi-gas mixed supply type metal hydride hydrogen storage PCT test device has a gas mixed supply system 1 connected to a small gas supply tank 2 via a 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 that of the small gas supply tank 2. Hydrogen and carbon monoxide are mixed and enter the large gas supply tank 112. The large gas supply tank 112 is used to temporarily store the mixed gas. The large gas supply tank 112 then supplies gas to the small gas supply tank 2 multiple times. The small gas supply tank 2 then supplies gas to the sample chamber 3 to react with the hydrogen storage alloy, thereby ensuring that the gas mixing ratio of the mixed gas used for multiple reactions with the hydrogen storage alloy is the same. The sample chamber 3 is connected to the main pipeline 10 via a sixth valve 9. The sample chamber 3 is placed in a temperature control device 4, which can control the temperature of the sample chamber 3 to maintain the sample chamber 3 at the required test temperature. Gas replacement is achieved by a vacuum pump 8 on the branch line. According to the ideal gas state equation, the hydrogen absorption and release amounts of the hydrogen storage alloy can be calculated, as well as the curves of the hydrogen release and absorption amounts of the hydrogen storage alloy changing with time, and the poisoning of the hydrogen storage alloy can be analyzed.

[0081] This multi-gas mixed-supply metal hydride hydrogen storage PCT test device is capable of achieving multi-gas mixed supply, precisely controlling the concentration and flow of hydrogen and other toxic gases, and simulating the environment during a real hydrogen purification process, thereby improving the accuracy of metal hydride poisoning assessments under different atmospheric conditions. Furthermore, the device is equipped with a monitoring and control system 5 that can track in real time the changes in the characteristics of the metal hydride during hydrogen absorption, providing accurate experimental test data and ensuring the reliability of the test results. Furthermore, this multi-gas mixed-supply metal hydride hydrogen storage PCT test device is easy to operate and highly safe, effectively improving the efficiency of experimental testing during the hydrogen purification process and providing important technical support for the optimized design of hydrogen storage alloys and the improvement of hydrogen purification technology.

[0082] 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 inserted into the peripheral sealing ring 32. The inlet end of the reaction chamber 34 is fixedly inserted into 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. The external thread and the internal thread are screwed together so that the reducer 31 is fixedly inserted into the peripheral sealing ring 32. The sealing ring 33 is arranged in the reducer 31 and is used to seal the gap between the reducer 31 and the reaction chamber 34. The arrangement of the sealing ring 33 and the peripheral sealing ring 32 ensures the sealing of the reaction chamber 34 and prevents gas leakage.

[0083] Optionally, a filter block 35 is fixedly installed 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, ensuring the normal operation of the device.

[0084] 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 accommodating cavity, the reaction chamber 34 is located in the accommodating 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 accommodating cavity is located in 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 accommodating cavity. After insertion, it is tightly combined with the opening of the accommodating cavity through the peripheral sealing ring 32, that is, the peripheral sealing ring 32 is embedded in the heat preservation body 41 to ensure sealing performance. The thermocouple 52 is inserted from the other end of the accommodating cavity and placed at the bottom of the reaction chamber 34.

[0085] Optionally, the monitoring and control system 5 includes a computer 53, a pressure sensor 51, and a thermocouple 52. The pressure sensor 51 is used to detect the gas pressure in the main pipeline 10, and the thermocouple 52 is used to monitor the temperature within 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 provide feedback of the temperature signal. The computer 53 adjusts the heating power of the heating ring 42 or the flow rate of the cooling medium based on the temperature change of the reaction chamber 34 to maintain a constant temperature in the reaction chamber 34. The pressure sensor 51 is used to detect the gas pressure in the main pipeline 10 and transmit the pressure signal to the computer 53.

[0086] Optionally, the gas mixed with hydrogen in the gas mixing and supply system 1 can also be set to carbon dioxide or nitrogen, and the carbon dioxide gas source and carbon dioxide gas mass flow controller, and / or the connected nitrogen gas source and nitrogen mass flow controller, 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 precise gas mixing and flow control.

[0087] 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 .

[0088] 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 described above, the multi-gas mixed supply type metal hydride hydrogen storage PCT testing method comprising:

[0089] S1: Perform a volume calibration operation to obtain the ratio k, k = (V1 + V2) / V1, where V1 is the sum of the volume of the small gas supply tank 2 and the volume of the pipe 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. According to k = (V1 + V2) / V1, V1 is the sum of the volume of the small gas supply tank 2 and the volume of the pipe between the small gas supply tank 2 and the sample chamber 3. If the value of V1 is known, the volume V2 of the space remaining in the sample chamber 3 after the hydrogen storage alloy is placed can be calculated based on k and V1, making the subsequent calculation of the hydrogen storage and hydrogen absorption capacity of the hydrogen storage alloy more accurate.

[0090] S2: Hydrogen absorption poisoning test, to analyze the poisoning of hydrogen storage alloys;

[0091] S3: Hydrogen desorption poisoning test, to analyze the poisoning of hydrogen storage alloys;

[0092] 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.

[0093] Optionally, the volume calibration operation includes:

[0094] 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;

[0095] 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;

[0096] 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. When the gas pressure in the main pipeline 10 stabilizes, a first measured value P1 of the gas pressure in the main pipeline 10 is recorded.

[0097] S104: Open the sixth valve 9, wait for the gas pressure in the main pipeline 10 to stabilize, and then record a second measured value P2 of the gas pressure in the main pipeline 10;

[0098] S105: Close the fourth valve 6, open the fifth valve 7, start the vacuum pump 8, and exhaust the gas in the sample chamber 3 through the vacuum pump 8. Then, turn off the vacuum pump 8 and close all valves.

[0099] S106: Repeat S102 to S105 to obtain multiple sets of first measurement values P1 and second measurement values P2;

[0100] S107: Perform linear regression based on multiple sets of first measurement values P1 and second measurement values P2 to obtain a slope k, where P2=kP1. k=(V1+V2) / V1, and when V1 is known, the V2 value is obtained.

[0101] In some preferred embodiments, the third valve 115 and the fourth valve 6 are repeatedly opened multiple times, the small air supply tank 2 is inflated through the large air supply tank 112, the third valve 115 and the fourth valve 6 are closed, and the first measurement value P1 of the pressure sensor 51 is recorded; the sixth valve 9 is opened, and the second measurement value P2 is recorded after the measurement value of the pressure sensor 51 stabilizes; according to this step, multiple groups of first measurement values P1 and second measurement values P2 are obtained; linear regression is performed based on the multiple groups of first measurement values P1 and second measurement values P2 to obtain the slope k.

[0102] 4 MPa, and then the pressure in the small gas supply tank 2 is increased to 0.3 MPa, 0.4 MPa and 0.6 MPa, respectively. MPa and 0.5 MPa; five sets of first and second measurement values P1 and P2 were obtained. Linear regression was performed on these five data sets to obtain P2 = kP1. Since k = (V1 + V2) / V1, the volume V2 of the space remaining in sample chamber 3 after the hydrogen storage alloy is stored can be calculated based on k and V1, making subsequent calculations of the hydrogen storage and absorption capacities of the hydrogen storage alloy more accurate.

[0103] The hydrogen absorption poisoning test includes:

[0104] S201: Setting 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 according to the required gas mixing ratio;

[0105] S202: Open the first valve 113 and the fourth valve 6, and hydrogen and carbon monoxide enter the small gas supply tank 2;

[0106] S203: When the readings of the hydrogen mass flow controller 103 and the carbon monoxide mass flow controller 106 are stable, the fourth valve 6 is closed and the third valve 115 is opened. The hydrogen and carbon monoxide are mixed according to the required gas mixing ratio, and the mixed gas formed by the hydrogen and carbon monoxide is entered and stored in the large gas supply tank 112;

[0107] 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;

[0108] 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;

[0109] 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;

[0110] 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;

[0111] S208: When the pressure in the small gas supply tank 2 reaches the pressure required for the test P 11 After that, close the third valve 115 and the fourth valve 6, and record the required pressure P 11 ;

[0112] 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;

[0113] 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;

[0114] S211: Real-time monitoring of the temperature in the sample chamber 3, and maintaining the temperature of the sample chamber 3 at the temperature T1 required for the hydrogen absorption test through the temperature control device 4;

[0115] 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 ;

[0116] 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;

[0117] 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 situation of hydrogen storage alloy.

[0118] Specifically, 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, including: hydrogen storage capacity of hydrogen storage alloy , where m is the mass of the hydrogen storage alloy in the sample chamber 3; n2 is the amount of gas filled into the sample chamber 3, n2=P 11 V1 / RT1; n3 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, n3=P t1 (V1+V2) / RT1; R is the gas constant, T1 is the preset temperature threshold, that is, the temperature required for the hydrogen absorption test; based on k and V1, calculate the volume V2 of the space remaining in the sample chamber after the hydrogen storage alloy is stored.

[0119] 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 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 capacity wt.% of the hydrogen storage alloy at the corresponding time, and then obtain the curve of the hydrogen storage capacity wt.% of the hydrogen storage alloy changing with time.

[0120] 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 requires simulating 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 COis 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 are the volume flow rates of hydrogen and carbon monoxide (SL / min), respectively. Based on the mass ratio a:b, the mass flow rate relationship can be obtained:

[0121]

[0122] mean , the mass flow rate is converted into volume flow rate through the relationship between molar mass and gas flow rate (the volume of 1 mol of gas in standard state is 22.424 L):

[0123]

[0124]

[0125] Substituting the above relationship between mass flow and volume flow into the formula of mass ratio, we can get:

[0126]

[0127] According to V H and V CO Set the parameters of the hydrogen mass flow controller and the carbon monoxide mass flow controller according to the ratio of .

[0128] The hydrogen degassing poisoning test includes:

[0129] 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;

[0130] 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;

[0131] 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;

[0132] 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;

[0133] S305: Real-time monitoring of the temperature in the sample chamber 3, and maintaining the temperature of the sample chamber 3 at the temperature T2 required for the hydrogen release test through the temperature control device 4;

[0134] S306: Real-time monitoring of the gas pressure in the main pipeline 10, recording the hydrogen release pressure P every fourth set time.t2 , until the hydrogen poisoning test is completed;

[0135] 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.

[0136] S308: Measure pressure P based on hydrogen release t2 , ratio k, ratio a2 / b2 and ideal gas state equation, calculate the hydrogen release amount of hydrogen storage alloy, and measure the pressure P according to multiple hydrogen release 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 situation of hydrogen storage alloy.

[0137] 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 completed, close all valves, separate the pipeline quick connector 21, and measure the ratio of hydrogen to carbon monoxide in the small gas supply tank 2 by mass spectrometry. The result is processed using the same calculation principle as in the hydrogen absorption poisoning process to calculate the amount of hydrogen released.

[0138] Obviously, the embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The embodiments do not describe all details in detail, nor do they limit the invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. It is not necessary and impossible to list all embodiments here.

Claims

1. A PCT test method for metal hydride hydrogen storage using a multi-gas mixed supply method, characterized by: Using a multi-gas mixed supply type metal hydride hydrogen storage PCT test device, The multi-gas mixed supply type metal hydride hydrogen storage PCT testing device includes: Main pipeline (10); A gas mixing 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 a large gas supply tank (112) and a third valve (115) connected in sequence; 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) through a quick connector (21); the volume of the large gas supply tank (112) is multiple times the volume of the small gas supply tank (2); A vacuum pump (8) and a fifth valve (7), wherein both ends of the fifth valve (7) are connected to the main pipeline (10) and the vacuum pump (8) respectively; The sample chamber (3) and the sixth valve (9), both ends of the sixth valve (9) are connected to the main pipeline (10) and the sample chamber (3) respectively, 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); a monitoring and control system (5) for detecting and recording the gas pressure in the main pipeline (10), controlling the temperature control device (4), and monitoring the temperature in the sample chamber (3); The PCT test method for multi-gas mixed supply metal hydride hydrogen storage includes: 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 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: Open the sixth valve (9), wait for the gas pressure in the main pipeline (10) to stabilize, and then record a second measured value P2 of the gas pressure in the main pipeline (10); S105: Close the fourth valve (6), open the fifth valve (7), start the vacuum pump (8), evacuate 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 P1 and second measurement values P2; S107: Perform linear regression based on multiple sets 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. The hydrogen absorption poisoning test includes: S201: Setting 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) according to a desired gas mixing ratio; 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 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 hydrogen and carbon monoxide is entered into and 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 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 required for the test P 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: Real-time monitoring of the temperature in the sample chamber (3), and maintaining the temperature of the sample chamber (3) at the temperature T1 required for the hydrogen absorption test through the 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 situation of hydrogen storage alloy.

2. The PCT testing method for metal hydride hydrogen storage using a multi-gas mixed supply method 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 PCT testing method for metal hydride hydrogen storage using a multi-gas mixed supply method 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 PCT testing method for metal hydride hydrogen storage using a multi-gas mixed supply method according to claim 2, wherein: 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 outer sealing ring (32) is embedded in the heat preservation body (41).

5. The PCT testing method for metal hydride hydrogen storage using a multi-gas mixed supply method according to claim 1, wherein: The monitoring and control system (5) includes a computer (53), a pressure sensor (51) and a thermocouple (52). 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 PCT testing method for metal hydride hydrogen storage using a multi-gas mixed supply method 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 PCT testing method for metal hydride hydrogen storage using a multi-gas mixed supply method according to claim 1, characterized in that: It also includes a safety valve (111), which is connected to the main pipeline (10).

8. The PCT testing method for metal hydride hydrogen storage using a multi-gas mixed supply method according to claim 1, wherein: 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 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 the temperature T2 required for the hydrogen release test through the 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 pressure P based on hydrogen release t2 , ratio k, ratio a2 / b2 and ideal gas state equation, calculate the hydrogen release amount of hydrogen storage alloy, and measure the pressure P according to multiple hydrogen release 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 situation of hydrogen storage alloy.

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