Testing device for hydrogen production electrolytic cell

Abstract

The utility model discloses a testing device for a hydrogen production electrolytic cell. The testing device at least comprises a power supply; the electrolytic bath is connected with the power supply, and the electrolytic bath comprises a cathode outlet and an anode outlet; the electrode is arranged in the electrolytic bath; the first separator is connected with the cathode outlet; the second separator is connected with the anode outlet; an outlet of the constant-temperature equipment is connected with the electrolytic cell, and the first separator and the second separator are connected in parallel and then connected with an inlet of the constant-temperature equipment; the first measuring equipment is arranged at an inlet of the constant temperature equipment; and the water supplementing loop is arranged between the first measuring equipment and the constant temperature equipment. According to the testing device of the hydrogen production electrolytic cell, the voltage stability of the electrolytic cell can be accurately tested, and the consistency and the reliability of a testing result can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by electrolysis of water, and in particular to a testing device for a hydrogen production electrolytic cell. Background Art

[0002] As a clean secondary energy source, hydrogen offers advantages such as high energy density, zero pollution, and zero carbon emissions, helping to address energy crises and environmental pollution. As a hydrogen production technology, water electrolysis offers advantages such as high purity, zero pollution, and strong controllability, providing a simple, effective, and promising method for hydrogen production. In water electrolysis, the stability of the electrolysis voltage in the electrolyzer significantly impacts its efficiency. Therefore, a test device is urgently needed to assess the stability of hydrogen production electrolyzers. Utility Model Content

[0003] The purpose of the utility model is to provide a testing device for a hydrogen production electrolyzer, which can measure the electrolysis voltage and the electrolysis voltage change rate of the electrolyzer to accurately test the voltage stability of the electrolyzer and improve the consistency and reliability of the test results.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the present invention is implemented through the following technical solutions.

[0005] The utility model provides a testing device for a hydrogen production electrolyzer, which at least comprises:

[0006] power supply;

[0007] an electrolytic cell connected to the power source, wherein the electrolytic cell comprises a cathode outlet and an anode outlet;

[0008] an electrode, disposed in the electrolytic cell;

[0009] a first separator connected to the cathode outlet;

[0010] a second separator connected to the anode outlet;

[0011] A constant temperature device, wherein the outlet of the constant temperature device is connected to the electrolytic cell, and the first separator and the second separator are connected in parallel and then connected to the inlet of the constant temperature device;

[0012] a first measuring device, disposed at the entrance of the constant temperature device; and

[0013] A water replenishment circuit is provided between the first measuring device and the constant temperature device.

[0014] In an embodiment of the present invention, the water supply circuit includes a water supply pipeline, and the outlet of the water supply pipeline is arranged between the first measuring device and the constant temperature device.

[0015] In an embodiment of the present invention, the water supply circuit further includes a water supply valve, and the water supply valve is provided on the water supply pipeline.

[0016] In one embodiment of the present invention, the first measuring device and the water supply valve are electrically connected.

[0017] In one embodiment of the present invention, the testing device further includes a second measuring device, and the second measuring device is connected to the interior of the electrolytic cell.

[0018] In one embodiment of the present invention, the second measuring device is electrically connected to the water supply valve.

[0019] In one embodiment of the present invention, the first measuring device is a density measuring device, and the second measuring device is a liquid level measuring device.

[0020] In an embodiment of the present invention, the water supply circuit further includes a water supply pump, and the water supply pump is arranged on a side of the water supply valve away from the first measuring device and the constant temperature device.

[0021] In an embodiment of the present invention, the testing device further includes a cathode outlet valve, and the cathode outlet valve is arranged between the cathode outlet and the first separator.

[0022] In an embodiment of the present invention, the testing device further comprises an anode outlet valve, and the anode outlet valve is arranged between the anode outlet and the second separator.

[0023] In summary, the present invention provides a hydrogen electrolyzer testing device capable of measuring the electrolysis voltage and rate of change of the electrolysis voltage to accurately evaluate the stability of the electrolysis voltage. Furthermore, the present invention improves the consistency, accuracy, and reliability of test results by maintaining constant test conditions during the test.

[0024] Of course, any one of the methods of implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of a testing device for a hydrogen production electrolyzer in one embodiment of the present invention.

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the electrolytic cell.

[0028] Marking Description:

[0029] 10. Power supply; 11. Electrolytic cell; 111. Cathode end plate; 112. Cathode separator; 113. Cathode plate; 114. Cathode frame; 115. Diaphragm; 116. Anode frame; 117. Bipolar plate; 1171. Anode surface; 1172. Cathode surface; 118. Anode plate; 119. Anode separator; 1110. Anode end plate; 1111. Electrolysis chamber; 11111. First electrolysis chamber; 11112. Second electrolysis chamber Chamber; 11113, third electrolysis chamber; 12, first separator; 13, second separator; 14, constant temperature device; 15, first measuring device; 16, water supply circuit; 161, water supply pipeline; 162, water supply valve; 163, water supply pump; 164, pure water tank; 17, second measuring device; 18, cathode outlet valve; 19, anode outlet valve; 20, anode outlet; 21, cathode outlet; 22, circulation pump; 23, electrode. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details of the present invention may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within the embodiments may be combined with one another, unless they conflict.

[0031] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0032] In this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like are used to indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of this application and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used solely for descriptive and distinguishing purposes and should not be construed as indicating or implying relative importance.

[0033] See also Figures 1 to 2 As shown, the present invention provides a test device for a hydrogen-producing electrolyzer, which includes, for example, a power supply 10, an electrolyzer 11, an electrode 23, a first separator 12, a second separator 13, a thermostat 14, a first measuring device 15, and a water replenishment circuit 16. The power supply 10 is connected to the electrolyzer 11, the electrode 23 is disposed within the electrolyzer 11, the outlet of the electrolyzer 11 is connected to the first separator 12 and the second separator 13, the first separator 12 and the second separator 13 are connected in parallel and connected to the inlet of the thermostat 14, the outlet of the thermostat 14 is connected to the electrolyzer 11, the first measuring device 15 is disposed at the inlet of the thermostat 14, and the water replenishment circuit 16 is disposed between the first measuring device 15 and the thermostat 14. The test device for a hydrogen-producing electrolyzer provided by the present invention measures the electrolysis voltage of the electrolyzer 11 during the electrolysis process and calculates the rate of change of the electrolysis voltage of the electrolyzer 11. The stability of the electrolysis voltage of the electrolyzer 11 is evaluated based on the rate of change of the electrolysis voltage. Moreover, in the test device provided by the present invention, the density, volume and temperature of the electrolyte in the electrolytic cell 11 are maintained at fixed values ​​through the constant temperature device 14, the first measuring device 15 and the water replenishment circuit 16, thereby improving the accuracy, consistency and reliability of the test results.

[0034] See also Figures 1 to 2 As shown, the testing device provided by the present invention can be applied to the testing process of various electrolytic cells such as alkaline hydrogen production electrolyzers, proton exchange membrane hydrogen production electrolyzers, anion exchange membrane hydrogen production electrolyzers or solid oxide hydrogen production electrolyzers, and seawater hydrogen production. In this embodiment, for example, the electrode 23 is used as an alkaline hydrogen production electrolyzer to illustrate the testing device.

[0035] See also Figure 1 As shown, in one embodiment of the present invention, the power supply 10 provides a constant current to the test device and measures the electrolysis voltage of the electrolytic cell 11 at a constant current density. The current density is, for example, 2000 A / m 2 -15000A / m 2 , for example 3000A / m 2 , 5000A / m2 、8000A / m 2 or 10000A / m 2 The current range of the power supply 10 is, for example, not less than 20 A, and the accuracy is, for example, ±0.5% FS; the voltage range of the power supply 10 is, for example, not less than 5 V, and the accuracy is, for example, ±0.5% FS.

[0036] See also Figures 1 to 2 As shown, in one embodiment of the present invention, the electrolytic cell 11 includes, for example, a cathode end plate 111, a cathode separator 112, an electrolysis chamber 1111, an anode separator 119, and an anode end plate 1110, arranged sequentially along the same direction. The cathode end plate 111 and the anode end plate 119 are made of, for example, at least one of nickel, carbon steel, aluminum, and iron. In this embodiment, the cathode end plate 111 and the anode end plate 1110 are made of, for example, pure nickel, with a nickel purity greater than 99.9%. In another embodiment of the present invention, the cathode end plate 111 and the anode end plate 1110 are made of, for example, carbon steel, with a nickel plating layer having a thickness greater than or equal to 50 μm and a nickel purity greater than 99.9%. The cathode end plate 111 and the anode end plate 1110 are provided to secure the entire electrolytic cell 11.

[0037] See also Figures 1 to 2 As shown, in one embodiment of the present invention, the cathode separator 112 and the anode separator 1110 are made of at least one insulating material such as polytetrafluoroethylene and rubber. The cathode separator 112 and the anode separator 1110 are provided to enhance the insulation and sealing properties of the electrolytic cell 11.

[0038] See also Figures 1 to 2As shown, in one embodiment of the present invention, there are, for example, multiple electrolysis chambers 1111, and the multiple electrolysis chambers 1111 are arranged in series. In this embodiment, there are, for example, three electrolysis chambers 1111, and the three electrolysis chambers 1111 are, for example, a first electrolysis chamber 11111, a second electrolysis chamber 11112, and a third electrolysis chamber 11113. Specifically, from the cathode end plate 111 to the anode end plate 1110, the cathode plate 113, the cathode pole frame 114, the diaphragm 115, the anode pole frame 116, the bipolar plate 117, the cathode pole frame 114, the diaphragm 115, the anode pole frame 116, the bipolar plate 117, the cathode pole frame 114, the diaphragm 115, the anode pole frame 116, and the anode plate 118 are arranged in sequence. Among them, the bipolar plate 117, for example, includes an anode surface 1171 and a cathode surface 1172 arranged opposite to each other, a first electrolysis chamber 11111 is formed between the cathode plate 113 and the anode surface 1171 in the adjacent bipolar plate 117, a second electrolysis chamber 11112 is formed between the cathode surface 1172 in the bipolar plate 117 and the anode surface 1171 in another bipolar plate 117, and a third electrolysis chamber 11113 is formed between the anode plate 118 and the cathode surface 1172 in the adjacent bipolar plate 117.

[0039] See also Figures 1 to 2 As shown, in one embodiment of the present invention, the material of the cathode plate 113 and the anode plate 118 includes at least one of nickel and carbon steel. In this embodiment, the material of the cathode plate 113 and the anode plate 118 is, for example, pure nickel, wherein the purity of the nickel is, for example, greater than 99.99%. By providing that the cathode plate 113 and the anode plate 118 are each connected to the power source 10 for conducting electrons, the current density on the plates is made more uniform, thereby improving the efficiency of hydrogen production by water electrolysis.

[0040] See also Figures 1 to 2 As shown, in one embodiment of the present invention, an opening is provided in each of the cathode frame 114 and the anode frame 116 for accommodating the electrode 23. The size and shape of the opening are consistent with the size and shape of the electrode 23 to ensure that the electrode 23 is securely positioned within the frame. The material of the cathode frame 114 and the anode frame 116 may include, for example, at least one of a high-temperature resistant material with a certain degree of deformation, an alkali corrosion-resistant material, an oxidation-resistant material, and an insulating material. In this embodiment, the material of the cathode frame 114 and the anode frame 116 may be polytetrafluoroethylene, for example, and the shape of the opening may be rectangular, for example.

[0041] See also Figures 1 to 2As shown, in one embodiment of the present invention, a diaphragm 115 is arranged between the cathode pole frame 114 and the anode pole frame 116. Wherein, the diaphragm 115 is, for example, a polyphenylene sulfide (PPS) diaphragm, an organic-inorganic composite diaphragm or a hydroxide ion exchange membrane, and the thickness of the PPS diaphragm is, for example, 0.5mm-1mm, and the thickness of the organic-inorganic composite diaphragm is, for example, 0.2mm-0.8mm. Moreover, the size of the diaphragm 115 is, for example, larger than the size of the opening on the pole frame. In the present embodiment, the diaphragm 115 is, for example, rectangular, and the diaphragm 115 is longer than the opening, for example, 2-10mm, and the diaphragm 115 is wider than the opening, for example, 2-10mm. By providing the diaphragm 115, it is possible to prevent the hydrogen generated by the cathode in the electrolytic cell 11 and the oxygen generated by the anode from mixing.

[0042] See also Figures 1 to 2 As shown, in one embodiment of the present invention, electrode 23 is arranged in electrolyzer 11.Specifically, electrode 23 is arranged in cathode pole frame 114 or anode pole frame 116.Wherein, electrode 23 is, for example, a hydrogen evolution electrode or an oxygen evolution electrode, and when electrode 23 is a hydrogen evolution electrode, electrode 23 is arranged in cathode pole frame 114, and a counter electrode is placed in anode pole frame 116, and when electrode 23 is an oxygen evolution electrode, electrode 23 is arranged in anode pole frame 116, and a counter electrode is placed in cathode pole frame 114.Wherein, the counter electrode is, for example, a nickel mesh, nickel foam, graphite, platinum wire or platinum mesh, and the mesh number of the counter electrode is, for example, 40 meshes-60 meshes.In the present embodiment, take electrode 23 as an example of a hydrogen evolution electrode for explanation, wherein, electrode 23 is placed in cathode pole frame 114, and a counter electrode is placed in anode pole frame 116.

[0043] See also Figures 1 to 2 As shown, in one embodiment of the present invention, the shape of the electrode 23 is, for example, polygonal, circular, or elliptical. In this embodiment, the electrode 23 is, for example, rectangular, with a length greater than 50 mm and a width greater than 40 mm. In another embodiment of the present invention, the electrode 23 is, for example, circular, with a diameter greater than 50 mm.

[0044] See also Figures 1 to 2As shown, in one embodiment of the present invention, an electrolyte is provided in the electrolytic cell 11. The electrolyte, for example, includes at least water and an electrolyte. The water may be, for example, first-grade water, second-grade water, or third-grade water. The electrolyte may be, for example, an acidic electrolyte or an alkaline electrolyte. The acidic electrolyte may include, for example, at least one of sulfuric acid, and the alkaline electrolyte may include, for example, at least one of potassium hydroxide and sodium hydroxide, to increase the conductivity of the aqueous solution and improve the gas production rate of the water electrolysis device. In this embodiment, the water may be, for example, first-grade water. The conductivity of the first-grade water at 25°C may be, for example, less than or equal to 0.01 mS / m. The soluble silicon content of the first-grade water may be, for example, less than or equal to 0.01 mg / L. The absorbance of the first-grade water may be, for example, less than or equal to 0.001 when tested at 254 nm and a 1 cm optical pathlength. The electrolyte may be, for example, potassium hydroxide. The mass fraction of the electrolyte in the electrolyte may be, for example, 15%-40%.

[0045] See also Figures 1 to 2 As shown, in one embodiment of the present invention, the electrolytic cell 11 is connected to a power source 10. The cathode plate 113 is connected to the negative electrode of the power source 10, and the anode plate 118 is connected to the positive electrode of the power source 10. Specifically, in each electrolysis chamber 1111, the electrode 23 in the cathode frame 114 electrolyzes water to produce hydrogen, and the counter electrode in the anode frame 116 electrolyzes water to produce oxygen.

[0046] See also Figures 1 to 2 As shown, in one embodiment of the present invention, the electrolytic cell 11 includes an anode outlet 20 and a cathode outlet 21. Specifically, the electrolyte and hydrogen produced on the electrode 23 side leave the electrolytic cell 11 from the cathode outlet 21, and the electrolyte and oxygen produced on the counter electrode side leave the electrolytic cell 11 from the anode outlet 20.

[0047] See also Figures 1 to 2 As shown, in one embodiment of the present invention, a first separator 12 is connected to the cathode outlet 21. The first separator 12 is, for example, a gas-liquid separator such as a gravity separator, a cyclone separator, or a filter separator. The material of the first separator 12 includes, for example, at least one of polypropylene, carbon steel, nickel, and stainless steel. Specifically, the electrolyte and hydrogen generated by the electrode 23 flow through the cathode outlet 21 and into the first separator 12. The first separator 12 separates the hydrogen from the electrolyte, and the electrolyte is returned to the electrolytic cell 11 for recycling.

[0048] See also Figure 1 As shown, in one embodiment of the present invention, a cathode outlet valve 18 is further provided between the first separator 12 and the cathode outlet 21 to adjust the flow rate of hydrogen and electrolyte flowing out of the cathode outlet 21 , thereby controlling the pressure inside the electrolytic cell 11 .

[0049] See also Figure 1As shown, in one embodiment of the present invention, a second separator 13 is connected to the anode outlet 20. The second separator 13 can be, for example, a gas-liquid separator such as a gravity separator, a cyclone separator, or a filter separator. The material of the second separator 13 can include, for example, at least one of polypropylene, carbon steel, nickel, and stainless steel. Specifically, the electrolyte and oxygen generated on the counter electrode side flow through the anode outlet 20 and into the second separator 13. The second separator 13 separates the oxygen from the electrolyte, and the electrolyte is returned to the electrolytic cell 11 for recycling.

[0050] See also Figure 1 As shown, in one embodiment of the present invention, an anode outlet valve 19 is further provided between the second separator 13 and the anode outlet 20 to adjust the flow rate of oxygen and electrolyte flowing out of the anode outlet 20, thereby controlling the pressure inside the electrolytic cell 11. The anode outlet valve 19 and the cathode outlet valve 18 can maintain the air pressure in the electrolytic cell 11 at a preset value to maintain the dynamic balance of the air pressure in the electrolytic cell 11. The preset value is, for example, 0.1 MPa-2 MPa. By providing the anode outlet valve 19 and the cathode outlet valve 18, the air pressure in the electrolytic cell 11 can be always maintained at a preset value during the test, so that the electrolysis voltage of the electrolytic cell 11 in different time periods is always measured at the same air pressure, thereby improving the reliability, accuracy and consistency of the test results.

[0051] See also Figure 1 As shown, in one embodiment of the present invention, the outlet of the thermostat 14 is connected to the electrolytic cell 11, and the first separator 12 and the second separator 13 are connected in parallel and connected to the inlet of the thermostat 14. The thermostat 14 is, for example, a cooling and heating integrated machine. Specifically, when the temperature of the electrolyte in the electrolytic cell 11 is lower than the preset temperature, the thermostat 14 adopts a heating mode to heat the electrolyte separated by the first separator 12 and the second separator 13 before feeding it into the electrolytic cell 11. When the temperature of the electrolyte in the electrolytic cell 11 is higher than the preset temperature, the thermostat 14 adopts a cooling mode to cool the electrolyte separated by the first separator 12 and the second separator 13 before feeding it into the electrolytic cell 11, so as to control the electrolyte in the electrolytic cell 11 at a preset temperature. The preset temperature is, for example, 80°C-90°C. As the test progresses, if the temperature of the electrolyte in the electrolytic cell 11 changes, the electrolysis voltage of the electrolytic cell 11 may not be measured at the same temperature during different time periods, resulting in deviations in the measured value and rate of change of the electrolysis voltage of the electrolytic cell 11. Therefore, by providing the constant temperature device 14, the temperature of the electrolyte in the electrolytic cell 11 can be controlled at a preset temperature, thereby improving the consistency, accuracy, and reliability of the test results.

[0052] See also Figure 1As shown, in one embodiment of the present invention, a circulation pump 22 is further provided between the constant temperature device 14 and the electrolytic cell 11. The circulation pump 22 can be, for example, a centrifugal pump, a peristaltic pump, or a diaphragm pump. The circulation pump 22 is provided to increase the pressure of the electrolyte separated by the first separator 12 and the second separator 13, thereby smoothly returning the electrolyte to the electrolytic cell 11 for recycling.

[0053] See also Figure 1 As shown, in one embodiment of the present invention, a first measuring device 15 is disposed at the inlet of the constant temperature device 14. Specifically, the first measuring device 15 is disposed between the parallel main circuit of the first separator 12 and the second separator 13 and the constant temperature device 14. The first measuring device 15 is, for example, a density measuring device. The first measuring device 15 is provided to detect the density of the electrolyte flowing through the test apparatus.

[0054] See also Figure 1 As shown, in one embodiment of the present invention, a water replenishment circuit 16 is disposed between the first measuring device 15 and the constant temperature device 14. Specifically, the water replenishment circuit 16 includes, for example, a water replenishment pipeline 161, a water replenishment valve 162, a water replenishment pump 163, and a pure water tank 164. The outlet of the water replenishment pipeline 161 is disposed between the first measuring device 15 and the constant temperature device 14. As the water electrolysis test progresses, the water in the electrolyte is continuously electrolyzed and consumed, resulting in a continuous decrease in the volume of the electrolyte. Therefore, the provision of the water replenishment pipeline 161 replenishes water to the testing device to ensure its normal operation.

[0055] See also Figures 1 to 2 As shown, in one embodiment of the present invention, a water supply valve 162 is provided on the water supply pipeline 161. The water supply valve 162 is electrically connected to the first measuring device 15. When the first measuring device 15 detects that the density of the electrolyte is higher than a preset density, the water supply valve 162 opens to supply water to the test device. When the first measuring device 15 detects that the density of the electrolyte is close to the preset density, the water supply valve 162 closes to stop supplying water to the test device. In this embodiment, the preset density is, for example, 1.2 g / cm 3 -1.3g / cm 3 By providing the water supply valve 162 , the density of the electrolyte can be maintained at a preset density during the test, so that the electrolysis voltage of the electrolytic cell 11 in different time periods is always measured under the same electrolyte density, thereby improving the reliability, accuracy and consistency of the test results.

[0056] See also Figure 1As shown, in one embodiment of the present invention, a water supply pump 163 is disposed on the side of the water supply valve 162 away from the thermostat 14 and the first measuring device 15. The water supply pump 163 can be, for example, a centrifugal pump, a diaphragm pump, or a peristaltic pump, with a flow rate greater than or equal to 10 mL / h. The water supply pump 163 is used to increase the pressure of the water in the water supply line 161, thereby smoothly delivering the water therein between the thermostat 14 and the first measuring device 15.

[0057] See also Figure 1 As shown, in one embodiment of the present invention, a pure water tank 164 is disposed on a side of the water supply pump 163 away from the water supply valve 162 and serves as the water source for the water supply circuit 16. The pure water tank 164 may store, for example, first-grade water, second-grade water, or third-grade water. In this embodiment, the pure water tank 164 stores, for example, first-grade water, the conductivity of which at 25°C is, for example, less than or equal to 0.01 mS / m, the soluble silicon content of which is, for example, less than or equal to 0.01 mg / L, and the absorbance of which, when tested at 254 nm and a 1 cm optical path length, is, for example, less than or equal to 0.001.

[0058] See also Figures 1 to 2 As shown, in one embodiment of the present invention, a second measuring device 17 is further provided on the electrolytic cell 11. Specifically, the second measuring device 17 is connected to the interior of the electrolytic cell 11. The second measuring device 17 is, for example, a liquid level measuring device, and the second measuring device 17 is electrically connected to the water supply valve 162. Specifically, when the second measuring device 17 detects that the liquid level of the electrolyte in the electrolytic cell 11 is low, the water supply valve 162 is started to supply water to the test device. When the second measuring device 17 detects that the liquid level of the electrolyte in the electrolytic cell 11 is high, the water supply valve 162 is closed and the supply of water to the test device is stopped. Through the second measuring device 17, the volume of the electrolyte in the electrolytic cell 11 can be maintained at a fixed value, so that the electrolysis voltage of the electrolytic cell 11 in different time periods is always measured under the same electrolyte volume, thereby improving the reliability, accuracy and consistency of the test results. Furthermore, the electrolyte in the test apparatus is dually monitored by the first measuring device 15 and the second measuring device 17 to maintain a constant density and volume of the electrolyte during the test, thereby further improving the reliability, accuracy and consistency of the test results.

[0059] See also Figures 1 to 2As shown, the stability of the electrolysis voltage of the electrolytic cell 11 is tested by the measuring device of the hydrogen production electrolytic cell provided by the utility model. The specific measurement process is as follows. After weighing the mass of the electrode 23, start the test device to preheat, for example, 5min-20min, and then use the constant current electrolysis method to measure the electrolysis voltage of the electrolytic cell 11 in the first time period, and calculate the average electrolysis voltage V1' and the electrolysis voltage V1 of the electrolytic cell 11 in the first time period, and then continue to run the test device for t period of time, measure the electrolysis voltage of the electrolytic cell 11 in the second time period, and calculate the average electrolysis voltage V2', the electrolysis voltage V2 of the electrolytic cell 11 and the rate of change V of the electrolysis voltage of the electrolytic cell 11 in the second time period. d , stop the test device and weigh the mass of electrode 23. The electrolysis voltage measurement interval within the first time period and the second time period is, for example, 20 seconds to 120 seconds, the first time period is, for example, 60 hours to 80 hours, or another example is 60 hours to 62 hours, 65 hours to 70 hours, or 70 hours to 72 hours, and t is, for example, 400 hours to 600 hours. The electrolysis voltage, electrolysis voltage change rate, and electrode mass change of electrolytic cell 11 are calculated according to the following formula.

[0060] V1=V1' / n;

[0061] V2=V2' / n;

[0062] V d =│V1-V2│*10 6 / t;

[0063] ΔM=│M0-M│;

[0064] Wherein, V1' is the average value of the electrolysis voltage of the electrolytic cell 11 in the first time period, in V, V1 is the electrolysis voltage of the electrolytic cell 11 in the first time period, in V, n is the number of electrolysis chambers 1111, V2' is the average value of the electrolysis voltage of the electrolytic cell 11 in the second time period, in V, V2 is the electrolysis voltage of the electrolytic cell 11 in the second time period, in V, V d is the rate of change of the electrolysis voltage of the electrolytic cell 11, in μV / h, t is the time interval between the first time period and the second time period, in h, M0 is the initial mass of the electrode 23 before the test, in mg, M is the termination mass of the electrode 23 after the test, in mg, ΔM is the mass change of the electrode 23 before and after the test, in mg. d , to accurately evaluate the stability of the electrolysis voltage of the electrolytic cell 11.

[0065] In summary, the present invention provides a testing device for a hydrogen-producing electrolyzer. By measuring the electrolysis voltage of the electrolyzer and calculating the rate of change of the electrolysis voltage, the stability of the electrolysis voltage of the electrolyzer can be accurately evaluated. Furthermore, the testing device provided by the present invention, through the cathode outlet valve, anode outlet valve, thermostat, water replenishment circuit, first measuring device, and second measuring device, can ensure that the gas pressure within the electrolyzer, as well as the temperature, volume, and density of the electrolyte, remain constant throughout the test process, thereby improving the accuracy, reliability, and consistency of the test results.

[0066] References throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be possible in light of the teachings herein and are considered part of the spirit and scope of the invention.

[0067] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the utility model, such as the technical solutions formed by the mutual replacement of the above-mentioned features with the technical features with similar functions disclosed in this application (but not limited to). In addition to the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the remaining technical features will not be repeated here.

Claims

1. A test device for a hydrogen production electrolyzer, characterized in that: At least: power supply; an electrolytic cell connected to the power source, wherein the electrolytic cell comprises a cathode outlet and an anode outlet; an electrode, disposed in the electrolytic cell; a first separator connected to the cathode outlet; a second separator connected to the anode outlet; A constant temperature device, wherein the outlet of the constant temperature device is connected to the electrolytic cell, and the first separator and the second separator are connected in parallel and then connected to the inlet of the constant temperature device; a first measuring device, disposed at the entrance of the constant temperature device; and A water replenishment circuit is provided between the first measuring device and the constant temperature device.

2. The testing device according to claim 1, wherein: The water supply circuit includes a water supply pipeline, and an outlet of the water supply pipeline is arranged between the first measuring device and the constant temperature device.

3. The testing device according to claim 2, characterized in that The water supply circuit further includes a water supply valve, which is arranged on the water supply pipeline.

4. The testing device according to claim 3, characterized in that: The first measuring device is electrically connected to the water supply valve.

5. The testing device according to claim 4, characterized in that: The testing apparatus also includes a second measuring device in communication with the interior of the electrolytic cell.

6. The testing device according to claim 5, characterized in that: The second measuring device is electrically connected to the water supply valve.

7. The testing device according to claim 5, characterized in that: The first measuring device is a density measuring device, and the second measuring device is a liquid level measuring device.

8. The testing device according to claim 3, characterized in that: The water replenishment circuit further includes a water replenishment pump, which is arranged on a side of the water replenishment valve away from the first measuring device and the constant temperature device.

9. The testing device according to claim 1, wherein: The testing device further includes a cathode outlet valve disposed between the cathode outlet and the first separator.

10. The testing device according to claim 1, wherein: The testing device further includes an anode outlet valve disposed between the anode outlet and the second separator.

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