A test device for anion exchange membrane water electrolysis hydrogen production membrane electrode

Abstract

The utility model relates to the field of hydrogen production by electrolysis of water, and provides a test device for anion exchange membrane water electrolysis hydrogen production membrane electrode, the test device comprising: an electrolytic cell unit, comprising a cathode region and an anode region, for electrolyzing electrolyte; a gas-liquid separation unit, comprising a cathode gas-liquid separation unit and an anode gas-liquid separation unit, the cathode gas-liquid separation unit is connected to the cathode region of the electrolytic cell, and the anode gas-liquid separation unit is connected to the anode region of the electrolytic cell; an electrolyte unit, the electrolyte unit is used to provide electrolytes of various concentrations and / or pH values ​​for the electrolytic cell unit; a computer control system, which is connected to the electrolytic cell unit, the gas-liquid separation unit and the electrolyte unit in communication. Advantages: intelligent control of the concentration and pH value of the electrolyte used for testing, and real-time monitoring and control, high test efficiency, good accuracy, strong stability, and strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production by water electrolysis, and more specifically, to a testing device for anion exchange membrane electrolysis water production membrane electrode. Background Technology

[0002] Electrolysis of water to produce hydrogen is considered a future technological route for hydrogen energy, especially the use of renewable energy to electrolyze water, which plays a crucial role in promoting my country's energy structure transformation and achieving its "dual-carbon" goals. Currently, water electrolysis to produce hydrogen mainly consists of four technologies: alkaline (ALK), proton exchange membrane (PEM), anion exchange membrane (AEM), and solid oxide electrolysis (SOEC). Among these, anion exchange membrane electrolysis technology has received increasing attention because it combines the advantages of both proton exchange membrane and alkaline electrolysis technologies while eliminating their respective disadvantages.

[0003] Unlike proton exchange membrane (PEM) water electrolysis for hydrogen production and alkaline water electrolysis for hydrogen production, anion exchange membrane (AEM) water electrolysis for hydrogen production is still in the research and development stage. Therefore, there are no standardized materials or testing procedures, and the various process mechanisms require further investigation. The electrolyte concentration is a key factor determining the performance and durability of anion exchange membranes (MEAs) in water electrolysis. Currently, studies commonly use pure water, and KOH or NaOH aqueous solutions with concentrations of 0.01 mol / L, 0.5 mol / L, and 1 mol / L as electrolytes. Different MEAs may exhibit different water electrolysis performance and durability in electrolytes of different concentrations. Therefore, to better understand the structure and materials of MEAs, testing may need to be conducted separately in electrolytes of different concentrations.

[0004] However, preparing electrolytes of various concentrations not only increases the workload of experiments but also complicates the testing process. Furthermore, when the electrolyte is recycled, the concentration may change during testing due to water consumption and the removal of electrolytes by gases. Timely compensation of the electrolyte concentration is crucial for stable testing. Additionally, because the electrolyte is alkaline, CO2 from the air may enter the testing system through the gas exhaust pipe, causing electrolyte contamination and interfering with the test. Therefore, it is necessary to minimize the entry of air into the testing system. Before assembling the MEA for AEM electrolysis performance testing, it is generally necessary to immerse the components containing AEM and anion exchange resin in an alkaline solution for multiple and prolonged ion exchanges, followed by rinsing the ion-exchanged components with pure water. This not only increases the complexity of the experiment but may also cause the hydroxide ions in the ion-exchanged AEM and anion exchange resin to react with CO2 from the air, thus affecting the accuracy of the test results. Utility Model Content

[0005] The present invention aims to overcome at least one defect (deficiency) of the prior art and provide a testing device for anion exchange membrane electrolysis water production hydrogen membrane electrode, which can intelligently adjust the concentration of the electrolyte for water electrolysis hydrogen production.

[0006] The technical solution adopted by this utility model is to provide a testing device for anion exchange membrane electrolysis water production hydrogen membrane electrode, the testing device comprising:

[0007] An electrolytic cell unit, comprising a cathode region and an anode region, is used for electrolyzing an electrolyte;

[0008] A gas-liquid separation unit includes a cathode gas-liquid separation unit and an anode gas-liquid separation unit, wherein the cathode gas-liquid separation unit is connected to the cathode region of the electrolytic cell, and the anode gas-liquid separation unit is connected to the anode region of the electrolytic cell;

[0009] Electrolyte unit, which provides electrolytes of various concentrations and / or pH levels to the electrolytic cell unit;

[0010] The computer control system is communicatively connected to the electrolytic cell unit, the gas-liquid separation unit, and the electrolyte unit.

[0011] In this technical solution, the cathode gas-liquid separation unit separates hydrogen and electrolyte; the emergency gas-liquid separation unit separates oxygen and electrolyte; and the electrolyte unit can adjust the electrolyte concentration and pH.

[0012] When testing is conducted in electrolytes of different concentrations, the computer control system controls the electrolyte unit to provide the required concentration and pH level of electrolyte to the electrolytic cell unit to test the performance of the membrane electrode under different conditions. This process eliminates the need for manual preparation of electrolytes of various concentrations and pH levels, simplifying the testing process and improving testing efficiency.

[0013] In addition, during the testing process, the concentration and pH of the electrolyte may change due to water consumption, the removal of electrolytes by gas, or the influence of air. The computer control system of this solution monitors and regulates the concentration and pH of the electrolyte in the electrolyte unit in real time to ensure that the electrolyte maintains the target concentration and pH during the membrane electrode testing process. This avoids interference with these two parameters, which could lead to deviations from the target values ​​and inaccurate test results. Thus, this solution improves the testing accuracy of anion exchange membrane electrodes.

[0014] Furthermore, the electrolyte unit includes an electrolyte storage tank, a replenishment liquid storage tank, and a pure water storage tank. The replenishment liquid concentration in the replenishment liquid storage tank is higher than the electrolyte concentration in the electrolyte storage tank. The pH of the replenishment liquid in the replenishment liquid storage tank is higher than the pH of the electrolyte in the electrolyte storage tank.

[0015] The replenishment liquid storage tank is connected to the electrolyte storage tank via a replenishment liquid pipeline, which is equipped with a replenishment liquid pump and a replenishment liquid valve.

[0016] The pure water storage tank is connected to the electrolyte storage tank via a pure water pipeline, and the pure water pipeline is equipped with a pure water pump and a pure water valve.

[0017] The electrolyte storage tank is connected to the cathode area of ​​the electrolytic cell unit through a cathode electrolyte pipeline, and the electrolyte storage tank is connected to the anode area of ​​the electrolytic cell unit through an anode electrolyte pipeline. The cathode electrolyte pipeline is equipped with an electrolyte cathode valve and an electrolyte cathode pump, and the anode electrolyte pipeline is equipped with an electrolyte anode valve and an electrolyte anode pump.

[0018] The replenishing liquid pump, replenishing liquid valve, pure water pump, pure water valve, electrolyte cathode pump, electrolyte cathode valve, electrolyte anode pump, and electrolyte anode valve are connected to the computer control system.

[0019] In this technical solution, since the concentration and pH of the electrolyte are not uniform during the testing process, such as low concentration and high pH or high concentration and low pH, a replenishment tank and a pure water tank are set up to adjust the concentration and pH of the electrolyte in the electrolyte tank.

[0020] Furthermore, if the concentration of the replenishing solution in the replenishing tank is the same as the electrolyte concentration in the electrolyte tank, when a higher concentration electrolyte needs to be prepared, it is necessary to first add another electrolyte of a higher concentration, which is inconvenient. Therefore, this solution sets the concentration in the replenishing solution tank to be higher than that in the electrolyte tank. This allows for the preparation of a higher concentration electrolyte simply by mixing the replenishing solution with pure water, thus simplifying the membrane electrode testing operation under different electrolyte concentrations. Similarly, setting the pH of the replenishing solution to be higher than that of the electrolyte facilitates the adjustment of the electrolyte pH, further simplifying the membrane electrode testing operation and pH adjustment steps under different electrolyte concentrations, and improving testing efficiency.

[0021] Secondly, in the existing technology, the electrolyte supply methods of the electrolytic cell include cathode supply, anode supply, and simultaneous supply to both anode and cathode. However, there is no mainstream supply mode. In this solution, the electrolyte storage tank is connected to the electrolytic cell unit through the anode electrolyte pipeline and the cathode electrolyte pipeline, and the above three supply modes can be used to meet the needs of different supply modes, thus having good adaptability.

[0022] Furthermore, if the liquid level in the storage tank is too high, there is a risk of overflow; if it is too low, it will affect the timely supply of electrolyte. Therefore, this solution uses the coordination of electrolyte storage tank, replenishment liquid storage tank, pure water storage tank, waste liquid storage tank, and valves and pumps on various pipelines to achieve the control of electrolyte concentration and pH while maintaining the set liquid level.

[0023] Furthermore, it also includes a waste liquid unit. The gas-liquid separation unit, replenishment liquid storage tank, electrolyte storage tank and pure water storage tank are all connected to the waste liquid unit through waste liquid pipelines. Waste liquid valves and waste liquid pumps are installed on the waste liquid pipelines.

[0024] In this technical solution, the waste liquid unit is used to hold the waste liquid that is not needed during and after the electrolysis process, which facilitates centralized treatment of the waste liquid.

[0025] Furthermore, the gas-liquid separation unit includes a gas-liquid separation device and a cooling device, wherein the cooling device is used to cool the gas-liquid separation device;

[0026] The gas-liquid separation device of the cathode gas-liquid separation unit is connected to the cathode region of the electrolytic cell unit, and the gas-liquid separation device of the anode gas-liquid separation unit is connected to the anode region of the electrolytic cell unit.

[0027] The cooling device is communicatively connected to the computer control system.

[0028] The outlet of the gas-liquid separator is connected to the waste liquid unit.

[0029] In this technical solution, after the gas and liquid are separated in the gas separation device, the gas is discharged from the gas outlet of the device, and the liquid is discharged from the liquid outlet of the device. Since the electrolysis process needs to be carried out at a certain temperature, the gas temperature of the generated electrolyte is relatively high. The cooling device lowers the temperature of the gas-liquid separation device, thereby accelerating the separation of gas and liquid.

[0030] Furthermore, it also includes a circulation pipeline that connects the electrolyte storage tank and the gas-liquid separation device. The circulation pipeline is equipped with a circulation valve that is communicatively connected to the computer control system.

[0031] In this technical solution, the electrolyte separated in the gas-liquid separation device can be recycled into an electrolyte storage tank through a circulation pipeline, achieving resource conservation and reducing testing costs. A circulation valve controls the opening and closing of the circulation pipeline, and a circulation pump controls the flow rate of the liquid within the circulation pipeline.

[0032] Furthermore, the electrolyte storage tank is equipped with a first liquid level monitoring device and a first pH monitoring device that are communicatively connected to the computer control system; the replenishment liquid storage tank is equipped with a second liquid level monitoring device and a second pH monitoring device that are communicatively connected to the computer control system; and the pure water storage tank is equipped with a third liquid level monitoring device that is communicatively connected to the computer control system.

[0033] In this technical solution, the computer control system monitors the pH level of the liquid in the connected storage tank through a pH monitoring device and calculates its concentration, and monitors the liquid level in the connected storage tank through a liquid level monitoring device.

[0034] Furthermore, it also includes a CO2 removal device, with the outlet of the gas-liquid separation unit connected to the CO2 removal device.

[0035] In this technical solution, the gas generated by the gas-liquid separation unit is discharged through a CO2 removal device. The CO2 removal device is used to prevent external air from being drawn back into the gas-liquid separation unit and contaminating the electrolyte, ensuring the accuracy of the test results and avoiding resource waste caused by electrolyte contamination and replacement, thereby saving resources and costs.

[0036] Furthermore, the CO2 removal device includes a connected alkaline solution container and an exhaust pipe. The outlet of the gas-liquid separation unit is connected to the CO2 removal device through an exhaust pipe. One end of the exhaust pipe connected to the CO2 removal device extends below the alkaline solution surface in the alkaline solution container, while the other end of the exhaust pipe connected to the alkaline solution container is positioned on the surface of the alkaline solution.

[0037] In this technical solution, the gas generated by the gas-liquid separation unit is discharged after passing through an alkaline solution. If the gas were discharged directly through the outlet pipe, external air would likely enter the gas-liquid separation unit directly through the outlet pipe, contaminating the internal electrolyte and entering the circulation. However, in this solution, even if external air passes through the outlet pipe, it will first come into contact with the alkaline solution. The alkaline solution reacts with the CO2 in the air to eliminate it, thus preventing CO2 from entering the gas-liquid separation unit and contaminating the electrolyte.

[0038] Furthermore, the CO2 removal device also includes a fourth pH monitoring device that is communicatively connected to the computer control system. The fourth pH monitoring device is used to monitor the pH of the alkali solution in the alkali solution container.

[0039] Furthermore, the electrolyte storage tank is equipped with a conductivity monitoring device that is connected to the computer control system.

[0040] In this technical solution, the conductivity monitoring device monitors the conductivity of the electrolyte in the electrolyte storage tank. If the conductivity is different from the preset value, it indicates that the electrolyte may be contaminated by gas, scale, etc., which will affect the electrolysis performance and test results. Thus, the deteriorated electrolyte can be replaced in time by monitoring the conductivity, thereby ensuring the accuracy of the test.

[0041] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0042] (1) When testing is conducted in electrolytes of different concentrations, the computer control system controls the electrolyte unit to provide the electrolyte of the required concentration and pH to the electrolytic cell unit in order to test the performance of the membrane electrode under different conditions. This process does not require manual preparation of electrolytes of various concentrations and pH, which simplifies the testing process and improves the testing efficiency.

[0043] (2) The computer control system of this scheme monitors and regulates the concentration and pH of the electrolyte in the electrolyte unit in real time to ensure that the electrolyte maintains the target concentration and pH during the membrane electrode test process, and avoids the two from being interfered with and deviating from the target value, resulting in inaccurate test results. In this way, this scheme improves the test accuracy of anion exchange membrane electrode.

[0044] (3) In the prior art, the electrolyte supply methods of the electrolytic cell include cathode supply, anode supply and simultaneous supply of anode and cathode, but there is no mainstream supply mode. In this solution, the electrolyte storage tank is connected to the electrolytic cell unit through the anode electrolyte pipeline and the cathode electrolyte pipeline, and the above three supply modes can be used to meet the needs of different supply modes and have good adaptability.

[0045] (4) This solution prevents external air from entering the gas-liquid separation unit and contaminating the electrolyte by setting up a CO2 removal device, thus ensuring the accuracy of the test results and avoiding the waste of resources caused by electrolyte contamination and replacement, thereby saving resources and costs.

[0046] (5) If the liquid level in the storage tank is too high, there is a risk of overflow. If it is too low, it will affect the timely supply of electrolyte. Therefore, in this solution, the concentration and pH of the electrolyte are controlled by the cooperation of electrolyte storage tank, replenishment liquid storage tank, pure water storage tank and waste liquid storage tank, as well as valves and pumps on each pipeline, while maintaining the set liquid level.

[0047] (6) This scheme ensures the accuracy of the test by timely replacement of deteriorated electrolyte through conductivity monitoring. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the overall structure of the testing device of this utility model.

[0049] Figure 2 This is a partial structural diagram of the electrolytic cell unit of this utility model.

[0050] Figure 3 This is a schematic diagram of the CO2 removal device of this utility model.

[0051] Figure label:

[0052] Electrolytic cell unit 100, anode flow field plate 110, insulating frame 120, heating element 121, temperature sensor 130;

[0053] Gas-liquid separation unit 200, gas-liquid separation device 210, gas-liquid cathode valve 211, gas-liquid anode valve 222, cathode circulation pipeline 223, anode circulation pipeline 224, circulation valve 225, gas outlet pipe 226, cooling device 220, cathode gas-liquid separation unit 230, anode gas-liquid separation unit 240.

[0054] Electrolytic cell storage tank 310, electrolyte cathode valve 311, electrolyte cathode pump 312, electrolyte anode valve 313, electrolyte anode pump 314, first liquid level monitoring device 315, first pH monitoring device 316, conductivity monitoring device 317; replenishment liquid storage tank 320, replenishment liquid valve 321, replenishment liquid pump 322, second liquid level monitoring device 323, second pH monitoring device 324; pure water storage tank 330, pure water valve 331, pure water pump 332, third liquid level monitoring device 333.

[0055] Waste liquid unit 400, waste liquid valve 410, waste liquid pump 420, fourth liquid level monitoring device 430;

[0056] CO2 removal device 500, alkali solution container 510, exhaust pipe 520, fourth pH monitoring device 530. Detailed Implementation

[0057] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0058] Example 1

[0059] refer to Figures 1 to 3 This embodiment provides a testing device for anion exchange membrane electrolysis water production hydrogen membrane electrode. The testing device includes: an electrolysis cell unit 100, including a cathode region and an anode region, for electrolyzing an electrolyte; a gas-liquid separation unit 200, including a cathode gas-liquid separation unit 230 and an anode gas-liquid separation unit 240, wherein the cathode gas-liquid separation unit 230 is connected to the cathode region of the electrolysis cell, and the anode gas-liquid separation unit 240 is connected to the anode region of the electrolysis cell; an electrolyte unit, which provides electrolytes of various concentrations and / or pH levels to the electrolysis cell unit 100; and a computer control system, which is communicatively connected to the electrolysis cell unit 100, the gas-liquid separation unit 200, and the electrolyte unit.

[0060] The computer control system (not shown) includes a controller that controls the opening and closing of valves communicatively connected to it, and controls the flow rate of liquid in the pipeline connected to the pump by controlling the pump.

[0061] The electrolytic cell unit 100 is an electrolytic cell. The cathode region of the electrolytic cell includes a cathode flow field plate and an insulating frame 120 that are attached to each other, and the anode region includes an anode flow field plate 110 and an insulating frame 120 that are attached to each other. During testing, the membrane electrode to be tested is placed between the cathode flow field plate and the anode flow field plate 110. A heating element 121 is bonded to the hollow area in the middle of the insulating frame 120, so that the heating element 121 is in direct contact with the flow field plate for heating. Both the cathode flow field plate and the anode flow field plate 110 have openings at the top, through which temperature sensors are inserted to monitor the temperature of the electrolyte. The temperature sensors are communicatively connected to the computer control system. Specifically, the cathode flow field plate is made of carbon, the anode flow field plate 110 is made of titanium, and the insulating frame 120 is made of epoxy resin laminate.

[0062] The electrolyte unit includes an electrolyte storage tank 310, a replenishment liquid storage tank 320, and a pure water storage tank 330. The replenishment liquid concentration in the replenishment liquid storage tank 320 is higher than that in the electrolyte storage tank 310. The replenishment liquid storage tank 320 is connected to the electrolyte storage tank 310 via a replenishment liquid pipeline, which is equipped with a replenishment liquid pump 322 and a replenishment liquid valve 321. The pure water storage tank 330 is connected to the electrolyte storage tank 310 via a pure water pipeline. The pipeline is equipped with a pure water pump 332 and a pure water valve 331. The electrolyte storage tank 310 is connected to the cathode region of the electrolytic cell unit 100 via a cathode electrolyte pipeline, and to the anode region of the electrolytic cell unit 100 via an anode electrolyte pipeline. The cathode electrolyte pipeline is equipped with an electrolyte cathode valve 311 and an electrolyte cathode pump 312, and the anode electrolyte pipeline is equipped with an electrolyte anode valve 313 and an electrolyte anode pump 314. The pure water storage tank 330 and the replenishment liquid storage tank 320 are connected by pipelines, and the pipelines are equipped with cleaning valves that communicate with the computer control system.

[0063] The replenishing liquid pump 322, replenishing liquid valve 321, pure water pump 332, pure water valve 331, electrolyte cathode pump 312, electrolyte cathode valve 311, electrolyte anode pump 314, and electrolyte anode valve 313 are connected to the computer control system.

[0064] The electrolyte storage tank 310 is equipped with a first liquid level monitoring device 315, a first pH monitoring device 316, and a conductivity monitoring device 317, all of which are communicatively connected to a computer control system. The replenishment liquid storage tank 320 is equipped with a second liquid level monitoring device 323 and a second pH monitoring device 324, also communicatively connected to a computer control system. The pure water storage tank 330 is equipped with a third liquid level monitoring device 333, which is also communicatively connected to a computer control system. The liquid level monitoring devices include, but are not limited to, level gauges, and the pH monitoring devices include, but are not limited to, pH meters.

[0065] It also includes a waste liquid unit 400. The gas-liquid separation unit 200, replenishment liquid storage tank 320, electrolyte storage tank 310, and pure water storage tank 330 are all connected to the waste liquid unit 400 through waste liquid pipelines. The waste liquid pipelines are equipped with waste liquid valves 410 and waste liquid pumps 420. Furthermore, the waste liquid unit 400 is a waste liquid storage tank, and the waste liquid storage tank is equipped with a fourth liquid level monitoring device 430 to monitor the waste liquid level in the waste liquid storage tank and prevent waste liquid from overflowing.

[0066] The gas-liquid separation unit 200 includes a gas-liquid separation device 210 and a cooling device 220. The cooling device 220 is used to cool the gas-liquid separation device 210. The gas-liquid separation device 210 of the cathode gas-liquid separation unit 230 is connected to the cathode area pipeline of the electrolytic cell unit 100, and a gas-liquid cathode valve 211 is provided on the pipeline. The gas-liquid separation device 210 of the anode gas-liquid separation unit 240 is connected to the anode area pipeline of the electrolytic cell unit 100, and a gas-liquid anode valve 222 is provided on the pipeline. The cooling device 220 is communicatively connected to the computer control system. The liquid outlet of the gas-liquid separation device 210 is connected to the waste liquid unit 400.

[0067] The system also includes a CO2 removal device 500, with the outlet of the gas-liquid separation unit 200 connected to the CO2 removal device 500. The CO2 removal device 500 includes a connected alkaline solution container 510 and an exhaust pipe 520. The outlet of the gas-liquid separation unit 210 is connected to the CO2 removal device 500 via an exhaust pipe 226. One end of the exhaust pipe 226 connected to the CO2 removal device 500 extends into the alkaline solution in the alkaline solution container 510, and the other end of the exhaust pipe 520 connected to the alkaline solution container 510 is positioned on the surface of the alkaline solution. The CO2 removal device 500 also includes a fourth pH monitoring device 530, which is communicatively connected to a computer control system. The fourth pH monitoring device 530 is used to monitor the pH of the alkaline solution in the alkaline solution container 510.

[0068] Hydrogen generated in the cathode region of electrolytic cell unit 100 carries electrolyte to the gas-liquid separation device 210 of cathode gas-liquid separation unit 230 for gas-liquid separation. The separated hydrogen enters the alkali solution in alkali solution container 510 through the gas outlet and gas outlet pipe 226, and is discharged after passing through the alkali solution. Similarly, oxygen generated in the anode region of electrolytic cell unit 100 carries electrolyte to the gas-liquid separation device 210 of anode gas-liquid separation unit 240 for gas-liquid separation. The separated oxygen enters the alkali solution in alkali solution container 510 through the gas outlet and gas outlet pipe 226, and is discharged after passing through the alkali solution.

[0069] It also includes a circulation pipeline connecting the electrolyte storage tank 310 and the gas-liquid separator 210. The circulation pipeline is equipped with a circulation valve 225, which is communicatively connected to the computer control system. Specifically, the circulation pipeline includes a cathode circulation pipeline 223 and an anode circulation pipeline 224. The circulation valve 225 includes a circulating cathode valve on the cathode circulation pipeline 223 and a circulating anode valve on the anode circulation pipeline 224. It can be understood that the gas-liquid separator 210 has two outlets, one connected to the circulation pipeline and the other connected to the waste liquid pipeline.

[0070] Example of the specific testing process of the testing device in this implementation:

[0071] Step 1: Flushing the pipeline:

[0072] Add electrolyte to the electrolyte storage tank 310 to the set level, for example, to 4 / 5 of the height of the electrolyte storage tank 310. Connect the membrane electrode to be tested into the electrolytic cell, with the cathode flow field plate in close contact with the cathode side of the membrane electrode and the anode flow field plate 110 in close contact with the anode side of the membrane electrode. Insert the temperature sensor into the cathode flow field plate and the anode flow field plate 110. Open the electrolyte anode valve 313, electrolyte cathode valve 311, gas-liquid cathode valve 211, gas-liquid anode valve 222, circulating cathode valve, circulating anode valve, and the waste liquid valve 410 on the waste liquid pipeline connected to the gas-liquid separator 210. Electrolyte cathode pump 312 and electrolyte anode pump 314 are set to transfer electrolyte to the electrolytic cell unit 100 at a flow rate of 50-60 mL / min for 20-40 min. After that, all the valves and pumps that have been opened are closed, and the waste liquid valve 410 on the waste liquid pipeline connected to the electrolyte storage tank 310 is opened to drain all the electrolyte. Then the waste liquid valve 410 is closed to complete the pipeline flushing.

[0073] Step 2: Membrane electrode testing:

[0074] Add electrolyte. Add electrolyte to electrolyte storage tank 310 to the set level, for example, to 4 / 5 of the height of electrolyte storage tank 310. The electrolyte is, for example, a 1 mol / L KOH aqueous solution. Add a higher concentration of replenishing solution to replenishing solution storage tank 320 to the set level, for example, to 4 / 5 of the height of replenishing solution storage tank 320. The electrolyte is, for example, a 2 mol / L KOH aqueous solution. Add pure water to pure water storage tank 330 to the set level, for example, to 4 / 5 of the height of pure water storage tank 330.

[0075] Online activation of the membrane electrode. Open the electrolyte cathode valve 311, electrolyte anode valve 313, gas-liquid cathode valve 211, gas-liquid anode valve 222, circulation cathode valve, and circulation anode valve to allow the electrolyte separated by the gas-liquid separator 210 to circulate in the circulation pipeline. Turn on the cooling device 220 and the heating element 121, set the temperature to 60°C, and wait for the temperature of the electrolytic cell unit 100 to stabilize at 60°C. Then, circulate the alkaline solution for 2 hours to complete the online activation of the membrane electrode.

[0076] Waste liquid discharge, pipeline cleaning, and electrolyte addition: Close all valves and pumps opened in the above steps. Open the waste liquid valve 410 on the waste liquid pipeline connected to the electrolyte storage tank 310 to discharge all electrolyte into the waste liquid unit 400, then close the waste liquid valve 410. Add electrolyte to the electrolyte storage tank 310 to the set level, for example, to 4 / 5 of the height of the electrolyte storage tank 310. Open the electrolyte anode valve 313, electrolyte cathode valve 311, gas-liquid cathode valve 211, gas-liquid anode valve 222, and circulation valve 225. Electrolyte cathode pump 312 and electrolyte anode pump 314 are set to transfer electrolyte to the electrolytic cell unit 100 at a flow rate of 50-60 mL / min for 5-10 minutes. After this period, all the previously opened valves and pumps are closed, and the waste liquid valve 410 on the waste liquid pipeline connected to the electrolyte storage tank 310 is opened to drain all the electrolyte. The waste liquid valve 410 is then closed, completing the pipeline cleaning. Electrolyte is then added to the electrolyte storage tank 310 to the set level, for example, to 4 / 5 of the tank's height. The electrolyte is, for example, a 1 mol / L KOH aqueous solution. This completes the electrolyte addition.

[0077] Membrane electrode polarization curve test: from 0.1 A / cm 2 Up to 2A / cm 2 At 0.1A / cm 2 The step size is 0.1V, the settling time for each current density point is 3 minutes, and the voltage at each current density is recorded; or from 1.4V to 2.5V, the step size is 0.1V, the settling time for each voltage point is 3 minutes, and the current density at each voltage is recorded.

[0078] Membrane electrode durability test: under a certain current density, such as 1 A / cm 2 The system can run continuously at a certain voltage, such as 1.8V, and record the change in voltage over time; or run continuously at a certain voltage, such as 1.8V, and record the change in current density over time.

[0079] Discharge of electrolyte: After the test, disconnect the power supply, turn off the cooling device 220 and all valves and pumps opened in the above steps, open the waste liquid valve 410 of the waste liquid pipeline connected to the electrolyte storage tank 310 and the replenishment liquid storage tank 320, and the waste liquid valve 410 of the waste liquid pipeline connected to the gas-liquid separator 210 and the waste liquid unit 400, and discharge the electrolyte to the waste liquid unit 400.

[0080] In the second step, when the electrolyte is circulated, if the liquid level in the electrolyte storage tank 310 is higher than the set value, the computer control system opens the waste liquid valve 410 of the waste liquid pipeline connected to the electrolyte storage tank 310 to discharge part of the electrolyte until the liquid level is the same as the set value.

[0081] In addition, during electrolyte circulation, the computer control system monitors and controls the concentration and pH of the electrolyte in the electrolyte storage tank 310 in real time. The following is an example of concentration control: When the computer control system detects that the electrolyte concentration in the electrolyte storage tank 310 is higher than the target value through the first pH monitoring device 316, it calculates the required volume of replenishing solution and pure water. If this process causes the liquid level in the electrolyte storage tank 310 to rise above the set liquid level, the computer control system simultaneously calculates the volume of electrolyte to be discharged, opens the waste liquid valve 410 of the waste liquid pipeline connected to the electrolyte storage tank 310, discharges the corresponding volume of electrolyte, and then closes the waste liquid valve 410 to prevent electrolyte from overflowing the storage tank after adding replenishing solution and pure water. The replenishing solution valve 321 and the pure water valve 331 are opened, and the liquid flow rate in the pipeline is controlled by the replenishing solution pump 322 and the pure water pump 332 to deliver the replenishing solution and pure water to the electrolyte storage tank 310 until the electrolyte concentration in the electrolyte storage tank 310 reaches the target value. Then, the replenishing solution valve 321, the replenishing solution pump 322, the pure water valve 331, and the pure water pump 332 are closed.

[0082] Step 3: Clean the pipeline.

[0083] Open the pure water valve 331, and set the pure water pump 332 to transfer water to the electrolyte storage tank 310 at a flow rate of 200 mL / min. Open the electrolyte cathode valve 311, electrolyte anode valve 313, gas-liquid cathode valve 211, gas-liquid anode valve 222, circulating cathode valve, circulating anode valve, and waste liquid valve 410 of the waste liquid pipeline connected to the gas-liquid separator 210. Set the electrolyte cathode pump 312 and electrolyte anode pump 314 to transfer water to the electrolytic cell unit 100 at a flow rate of 100 mL / min. At the same time, open the cleaning valve to deliver pure water to the replenishment tank 320 until the liquid level is 5 / 6 of the tank height. When the pH of the liquid in the electrolyte storage tank 310 reaches 7, the cleaning is considered complete. After cleaning, open the waste liquid valve 410 corresponding to the electrolyte storage tank 310, replenishment tank 320, and pure water storage tank 330 to discharge all the liquid into the waste liquid unit 400.

[0084] This invention ensures testing accuracy through multiple mechanisms, including real-time control of electrolyte concentration and pH, a CO2 removal device 500 to prevent external air contamination of the electrolyte, and conductivity monitoring of the electrolyte. Intelligent control of concentration and pH, along with level management, is achieved through the coordinated operation of the electrolyte storage tank 310, replenishment tank 320, pure water tank 330, waste liquid tank, and computer control system, ensuring normal test operation and improving testing efficiency. Furthermore, this invention can adapt to various electrolyte supply modes. Therefore, this invention offers high testing efficiency, good accuracy, strong stability, and wide adaptability.

[0085] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A test device for anion exchange membrane water electrolysis hydrogen production membrane electrode, characterized in that: The testing device comprises: An electrolytic cell unit, comprising a cathode region and an anode region, for electrolyzing an electrolyte; A gas-liquid separation unit, comprising a cathode gas-liquid separation unit and an anode gas-liquid separation unit, wherein the cathode gas-liquid separation unit is connected to the cathode region of the electrolytic cell, and the anode gas-liquid separation unit is connected to the anode region of the electrolytic cell; An electrolyte unit, the electrolyte unit is used to provide electrolytes of various concentrations and / or pH values ​​to the electrolytic cell unit; A computer control system is communicatively connected with the electrolytic cell unit, the gas-liquid separation unit and the electrolyte unit.

2. The testing device for the anion exchange membrane water electrolysis hydrogen production membrane electrode according to claim 1, characterized in that: The electrolyte unit comprises an electrolyte storage tank, a replenishing liquid storage tank and a pure water storage tank, wherein the replenishing liquid concentration of the replenishing liquid storage tank is higher than the electrolyte concentration of the electrolyte storage tank; the replenishing liquid pH of the replenishing liquid storage tank is higher than the electrolyte pH of the electrolyte storage tank; The replenishing liquid storage tank is connected to the electrolyte storage tank through a replenishing liquid pipeline, and a replenishing liquid pump and a replenishing liquid valve are provided on the replenishing liquid pipeline; The pure water storage tank is connected to the electrolyte storage tank through a pure water pipeline, and a pure water pump and a pure water valve are provided on the pure water pipeline; The electrolyte storage tank is connected to the cathode region of the electrolytic cell unit through a cathode electrolyte pipeline, and the electrolyte storage tank is connected to the anode region of the electrolytic cell unit through an anode electrolyte pipeline. The cathode electrolyte pipeline is provided with an electrolyte cathode valve and an electrolyte cathode pump, and the anode electrolyte pipeline is provided with an electrolyte anode valve and an electrolyte anode pump; The replenishing liquid pump, replenishing liquid valve, pure water pump, pure water valve, electrolyte cathode pump, electrolyte cathode valve, electrolyte anode pump and electrolyte anode valve are communicatively connected with a computer control system.

3. The testing device for the anion exchange membrane water electrolysis hydrogen production membrane electrode according to claim 2, characterized in that: It also includes a waste liquid unit. The gas-liquid separation unit, the supplementary liquid storage tank, the electrolyte storage tank and the pure water storage tank are all connected to the waste liquid unit through a waste liquid pipeline. A waste liquid valve and a waste liquid pump are arranged on the waste liquid pipeline.

4. The testing device for the anion exchange membrane water electrolysis hydrogen production membrane electrode according to claim 3, characterized in that: The gas-liquid separation unit comprises a gas-liquid separation device and a cooling device, wherein the cooling device is used to cool the gas-liquid separation device; The gas-liquid separation device of the cathode gas-liquid separation unit is in communication with the cathode region of the electrolytic cell unit, and the gas-liquid separation device of the anode gas-liquid separation unit is in communication with the anode region of the electrolytic cell unit; The cooling device is communicatively connected with a computer control system; The liquid outlet of the gas-liquid separation device is connected to the waste liquid unit.

5. The testing device for anion exchange membrane water electrolysis hydrogen production membrane electrode according to claim 4, characterized in that: It also includes a circulation pipeline, which is connected to the electrolyte storage tank and the gas-liquid separation device. A circulation valve is arranged on the circulation pipeline, and the circulation valve is communicatively connected with the computer control system.

6. The testing device for the anion exchange membrane water electrolysis hydrogen production membrane electrode according to claim 2, characterized in that: The electrolyte storage tank is provided with a first liquid level monitoring device and a first pH monitoring device which are communicatively connected to the computer control system; the supplementary liquid storage tank is provided with a second liquid level monitoring device and a second pH monitoring device which are communicatively connected to the computer control system; and the pure water storage tank is provided with a third liquid level monitoring device which is communicatively connected to the computer control system.

7. The testing device for anion exchange membrane water electrolysis hydrogen production membrane electrode according to claim 1, characterized in that: It also includes a CO2 removal device, and the gas outlet of the gas-liquid separation unit is connected to the CO2 removal device.

8. The testing device for anion exchange membrane water electrolysis hydrogen production membrane electrode according to claim 7, characterized in that: The CO2 removal device includes a connected alkali liquid containing device and an exhaust pipe. The gas outlet of the gas-liquid separation unit is connected to the CO2 removal device through the outlet pipe. One end of the outlet pipe connected to the CO2 removal device extends below the alkali liquid surface of the alkali liquid containing device, and one end of the exhaust pipe connected to the alkali liquid containing device is arranged on the liquid surface of the alkali liquid.

9. The testing device for anion exchange membrane water electrolysis hydrogen production membrane electrode according to claim 7, characterized in that: The CO2 removal device also includes a fourth pH monitoring device that is communicatively connected to the computer control system, and the fourth pH monitoring device is used to monitor the acidity and alkalinity of the alkali solution in the alkali solution containing device.

10. The testing device for anion exchange membrane water electrolysis hydrogen production membrane electrode according to any one of claims 2 to 6, characterized in that: The electrolyte storage tank is provided with a conductivity monitoring device which is in communication connection with the computer control system.

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