Water electrolysis hydrogen production electrode or diaphragm test system and test method

Abstract

The invention discloses a water electrolysis hydrogen production electrode or diaphragm test system and test method. The test system comprises a plurality of small electrolysis chambers, wherein each small electrolysis chamber is arranged to be suitable for being detachably assembled with an electrode or a diaphragm; the power supply unit is electrically connected with the plurality of small electrolysis chambers for equal-current power supply; the alkali liquor storage tank is connected with the plurality of small electrolysis chambers so as to provide electrolyte; the gas-liquid separation unit is connected with the plurality of small electrolysis chambers so as to collect gas generated by the plurality of small electrolysis chambers and separate electrolyte carried in the gas; the concentration adjusting unit is connected with the alkali liquor storage tank and comprises an alkali liquor concentration monitoring module for monitoring the concentration of alkali liquor in the alkali liquor storage tank and a water supplementing and diluting module for diluting the alkali liquor in the alkali liquor storage tank; and the plurality of small electrolysis chambers are respectively connected with a voltage monitoring unit so as to detect the voltage value of each small electrolysis chamber under the conditions of equal-current power supply and equal alkali liquor. The test system disclosed by the invention is low in test cost, high in precision and safer in test process.

Description

Technical Field

[0001] The invention relates to the technical field of water electrolysis hydrogen production, and in particular to a water electrolysis hydrogen production electrode or diaphragm testing system and a testing method. Background Art

[0002] Alkaline water electrolysis is a widely used hydrogen production technology in industry. The main component of the alkaline water electrolysis hydrogen production system commonly used in the industrial field is the electrolyzer. The interior of the electrolyzer is divided into an anode area and a cathode area by a diaphragm, and an anode electrode and a cathode electrode are installed respectively. When working, the electrolyzer is filled with an electrolyte, which is generally a potassium hydroxide or sodium hydroxide solution. The anode electrode and the cathode electrode are powered to electrolyze water to produce hydrogen and oxygen.

[0003] However, industrial-grade water electrolysis hydrogen production devices are not suitable for laboratory electrode and diaphragm performance testing due to their high pressure and high output characteristics. These devices not only have high energy consumption, but also the purity and amount of the gas produced are difficult to control, posing safety hazards. Moreover, it is difficult to quickly compare and select a variety of electrodes or diaphragms. Therefore, it is urgent to develop a water electrolysis system suitable for laboratory testing, so that it can operate at normal pressure, produce small gas volume, have low energy consumption, and facilitate frequent testing.

[0004] Based on this, it is necessary to propose a technical solution to overcome the shortcomings of the existing technology. Summary of the invention

[0005] In order to overcome the defects of the prior art, the present invention proposes a water electrolysis hydrogen production electrode or diaphragm testing system and testing method, which is suitable for laboratory testing, has low testing cost, high accuracy, safer testing process, and is convenient for rapid selection of electrodes or diaphragms.

[0006] The present invention is implemented by the following technical solution: a water electrolysis hydrogen production electrode or diaphragm testing system, comprising: A plurality of electrolysis chambers, each of the electrolysis chambers being configured to be detachably equipped with an electrode or a diaphragm; A power supply unit, electrically connected to the plurality of electrolysis chambers, to supply power to the plurality of electrolysis chambers in an isotropic manner; an alkali solution storage tank connected to the plurality of electrolysis chambers to provide electrolyte to the plurality of electrolysis chambers; a gas-liquid separation unit connected to the plurality of electrolysis chambers to collect the gases generated by the plurality of electrolysis chambers and separate the electrolyte carried in the gases; and A concentration regulating unit connected to the alkali solution storage tank, the concentration regulating unit comprising an alkali solution concentration monitoring module for monitoring the alkali solution concentration in the alkali solution storage tank, and a water replenishment dilution module for diluting the alkali solution in the alkali solution storage tank; Wherein, the plurality of electrolytic chambers are respectively connected to voltage monitoring units to detect the voltage value of each electrolytic chamber under equal current power supply and equal alkaline solution conditions.

[0007] As a further improved technical solution of the present application, the alkali solution storage tank and the multiple electrolysis chambers are connected via a liquid inlet pipeline, and the liquid inlet pipeline includes a main pipe and multiple branch pipes connected between the main pipe and the multiple electrolysis chambers, wherein the main pipe is connected to a circulation pump and the alkali solution concentration monitoring module, and each of the branch pipes is provided with an electromagnetic flow control valve.

[0008] As a further improved technical solution of the present application, the gas-liquid separation unit includes an oxygen separator and a hydrogen separator, the oxygen output sides of the multiple electrolysis chambers are connected to the oxygen separator, and the hydrogen output sides of the multiple electrolysis chambers are connected to the hydrogen separator, and the oxygen separator and the hydrogen separator are provided with liquid level display tubes for observing the liquid levels therein.

[0009] As a further improved technical solution of the present application, the height of the liquid level display tube is not less than 10 cm, and the distance between the two ends of the liquid level display tube and the end of the separator where it is located is not less than 4 cm.

[0010] As a further improved technical solution of the present application, the lower ends of the oxygen separator and the hydrogen separator are connected to the alkali solution storage tank via a switch valve.

[0011] As a further improved technical solution of the present application, the gas-liquid separation unit includes an oxygen washer and a hydrogen washer for holding cleaning water, the upper end of the oxygen separator is connected to the oxygen washer, and the upper end of the hydrogen separator is connected to the hydrogen washer, wherein the oxygen washer and the hydrogen washer are also provided with a dripping net located above the liquid surface of the cleaning water.

[0012] As a further improved technical solution of the present application, the oxygen scrubber and the hydrogen scrubber are connected to a water replenishment pipeline, wherein the water replenishment pipeline or the lower end of the oxygen scrubber and the hydrogen scrubber is connected to the alkali solution storage tank through an electromagnetic regulating valve to replenish water and dilute the alkali solution in the alkali solution storage tank.

[0013] As a further improved technical solution of the present application, the alkali solution storage tank includes a heater for heating the alkali solution therein.

[0014] The present invention is also implemented by the following technical solution: a method for testing an electrode or diaphragm for producing hydrogen by electrolysis of water, which is applied to the test system as described above, wherein the test method comprises: Assembling a plurality of electrodes or a plurality of diaphragms to be tested in the plurality of electrolysis chambers, wherein the plurality of electrolysis chambers are electrically connected to the power supply unit and the voltage monitoring unit, and the plurality of electrolysis chambers are fluidically connected to the alkali solution storage tank and the gas-liquid separation unit; The alkali solution storage tank circulates electrolyte to the multiple electrolytic chambers, starts the power supply unit to supply equal current to the multiple electrolytic chambers and monitors the voltage value of each electrolytic chamber; Monitoring the concentration of the alkali solution in the alkali solution storage tank, and when the concentration of the alkali solution exceeds a concentration threshold, replenishing water and diluting the alkali solution to control the concentration of the alkali solution to be maintained within a preset concentration range; Obtain the voltage value of each electrolytic chamber when the system is in stable operation state.

[0015] As a further improved technical solution of the present application, the testing method also includes: before providing electrolyte to the multiple electrolysis chambers and monitoring the alkali concentration in the alkali storage tank, heating the alkali in the alkali storage tank to a preset temperature, wherein the preset temperature is 70°C to 90°C.

[0016] The present application provides a water electrolysis hydrogen production electrode or diaphragm test system and test method, including a plurality of electrolysis chambers, each of which is configured to be suitable for detachably assembling electrodes or diaphragms, and the number of electrolysis chambers can be freely selected according to test needs, and each electrolysis chamber shares a set of power supply units, alkali solution circulation, concentration adjustment and gas-liquid separation systems, and each electrolysis chamber has different voltage values ​​based on the different electrodes or diaphragms to be tested assembled therein, so that the test efficiency can be greatly reduced while the test cost is greatly reduced, and the performance of different electrodes or diaphragms to be tested can be intuitively compared under the same conditions. The test system and test method of the present application are carried out under normal pressure, the gas output is small, and it can be directly emptied after cleaning without safety hazards. The present application monitors and adjusts the alkali solution concentration in real time, so that the alkali solution concentration fluctuation range is small, the system error is small, and the test accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a system diagram of an embodiment of a test system of the present invention.

[0018] The accompanying drawings are marked as follows: 1-electrolysis chamber; 2-power supply unit; 3-alkali solution storage tank; 31-heater; 32-circulation pump; 33-alkali solution concentration monitoring module; 41-oxygen separator; 42-hydrogen separator; 43-liquid level display tube; 51-oxygen cleaner; 511-manual valve; 512-oxygen discharge path; 52-hydrogen cleaner; 522-hydrogen discharge path; 61-drip net; 7-water supply pipeline; 71-water supply valve; 72-electromagnetic regulating valve; 81-main pipe; 82-branch pipe; 821-electromagnetic flow control valve. DETAILED DESCRIPTION

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0020] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 As shown, the present application provides a water electrolysis hydrogen production electrode or diaphragm testing system for testing the performance of an anode electrode, a cathode electrode or a diaphragm. The testing system includes a plurality of electrolysis chambers 1, each of which is configured to be suitable for detachably assembling an electrode or a diaphragm. When a plurality of electrolysis chambers 1 are used to test the performance of a plurality of anode electrodes, it is necessary to ensure that the cathode electrodes used in the plurality of electrolysis chambers 1 are the same and the diaphragms used in the plurality of electrolysis chambers 1 are the same, so that only the anode electrode is used as a variable for testing and evaluation. Similarly, when a plurality of electrolysis chambers 1 are used to test the performance of a plurality of cathode electrodes, it is necessary to ensure that the anode electrodes used in the plurality of electrolysis chambers 1 are the same and the diaphragms are the same; when a plurality of electrolysis chambers 1 are used to test the performance of a plurality of diaphragms, it is necessary to ensure that the anode electrodes used in the plurality of electrolysis chambers 1 are the same and the cathode electrodes are the same.

[0022] The water electrolysis hydrogen production electrode or diaphragm test system includes a power supply unit 2 electrically connected to the multiple electrolysis chambers 1, and the power supply unit 2 supplies equal current to the multiple electrolysis chambers 1. The so-called equal current power supply means that the power supply unit 2 provides the same current to each electrolysis chamber 1 participating in the test. In this embodiment, the multiple electrolysis chambers 1 participating in the test form a series circuit with the power supply unit 2 to achieve the same current flowing through each electrolysis chamber 1. In this embodiment, the power supply unit 2 supplies power to the multiple electrolysis chambers 1 in a constant current mode. The multiple electrolysis chambers 1 are also respectively connected to voltage monitoring units, and the voltage monitoring unit is used to detect the voltage value of each of the electrolysis chambers 1 under equal current power supply and the same alkaline solution conditions, so that it is convenient to intuitively compare the performance of different electrodes or diaphragms to be tested under the same conditions, which can greatly reduce the test cost while improving the test efficiency.

[0023] The electrolysis water hydrogen production electrode or diaphragm test system includes an alkali solution storage tank 3 connected to the multiple electrolysis chambers 1. The alkali solution storage tank 3 stores alkali solution, such as potassium hydroxide solution or sodium hydroxide solution. The alkali solution in the alkali solution storage tank 3 is used to provide the multiple electrolysis chambers 1 to be electrolyzed as an electrolyte in the electrolysis chambers 1 to produce hydrogen and oxygen. In this embodiment, the alkali solution storage tank 3 and the multiple electrolysis chambers 1 are connected by a liquid inlet pipeline, and the liquid inlet pipeline includes a main pipe 81 and a plurality of branch pipes 82 connected between the main pipe 81 and the multiple electrolysis chambers 1. Among them, the main pipe 81 is connected to a circulation pump 32, and the circulation pump 32 is used to transport the alkali solution in the alkali solution storage tank 3 to each of the electrolysis chambers 1 through the branch pipe 82. An electromagnetic flow control valve 821 is provided on each of the branch pipes 82 to facilitate accurate control of the liquid inlet flow of each electrolysis chamber 1 to keep it consistent. The alkali solution storage tank 3 includes a heater 31 for heating the alkali solution therein. During operation, the alkali solution is heated to a preset temperature by the heater 31 and then transported to the multiple electrolysis chambers 1 by the circulation pump 32. By heating the alkali solution to the preset temperature, the electrolysis reaction process is facilitated.

[0024] The electrolytic water hydrogen production electrode or diaphragm test system includes a concentration adjustment unit, which is connected to the alkali solution storage tank 3, and includes an alkali solution concentration monitoring module 33 for monitoring the alkali solution concentration in the alkali solution storage tank, and a water replenishment and dilution module for diluting the alkali solution in the alkali solution storage tank 3. In this embodiment, the alkali solution concentration monitoring module 33 is arranged on the main pipe 81, and is used to detect the concentration of the alkali solution flowing through the main pipe 81 when the circulation pump 32 transports the alkali solution in the alkali solution storage tank 3 to the electrolysis chamber 1. The water replenishment and dilution module is connected to the alkali solution storage tank 3 to replenish water to the alkali solution storage tank 3 to adjust the alkali solution concentration.

[0025] The electrolysis water hydrogen production electrode or diaphragm test system further includes a gas-liquid separation unit for filtering and cleaning the gas generated by the electrolysis chamber 1. The gas-liquid separation unit is connected to the multiple electrolysis chambers 1 to collect the gas generated by the multiple electrolysis chambers 1 and separate the electrolyte carried in the gas. In this embodiment, the gas-liquid separation unit includes an oxygen separator 41 and a hydrogen separator 42, and the oxygen output side of the multiple electrolysis chambers 1 is connected to the oxygen separator 41, and the hydrogen output side of the multiple electrolysis chambers 1 is connected to the hydrogen separator 42. Specifically, the oxygen separator 41 and the hydrogen separator 42 include a separation tank, and a tortuous flow path is provided in the separation tank so that the alkali liquid carried by the gas is precipitated and deposited in the lower part of the separation tank during the upward flow of oxygen or hydrogen in the separation tank. Further, the oxygen separator 41 and the hydrogen separator 42 are provided with a liquid level display tube 43 for observing the liquid level therein. The liquid level display tube 43 is a transparent tube. In this embodiment, the height of the liquid level display tube 43 is not less than 10 cm, and the distance between the two ends of the liquid level display tube 43 and the end of the separator in which it is located is not less than 4 cm, so that the liquid in the separator can be observed when it is deposited to a preset height, so as to discharge the deposited liquid in time. In this embodiment, the lower ends of the oxygen separator 41 and the hydrogen separator 42 are connected to the alkali liquid storage tank 3 through a switch valve to discharge the separated alkali liquid back into the alkali liquid storage tank 3 for recycling.

[0026] In this embodiment, the gas-liquid separation unit also includes an oxygen washer 51 and a hydrogen washer 52 for containing cleaning water. The upper end of the oxygen separator 41 is connected to the oxygen washer 51 through a pipeline, and the upper end of the hydrogen separator 42 is connected to the hydrogen washer 52 through a pipeline. The oxygen washer 51 and the hydrogen washer 52 are filled with pure water, and a valve is provided on the pipeline. In this embodiment, the valve is, for example, a manual valve 511. The air outlet of the pipeline is inserted into the pure water, and the oxygen or hydrogen discharged through the air outlet of the pipeline is passed into the pure water and then escapes upward to achieve cleaning. The oxygen washer 51 and the hydrogen washer 52 are both transparent tanks so that the water level of the liquid therein can be visually observed, which is convenient for timely water replenishment. In this embodiment, the oxygen scrubber 51 and the hydrogen scrubber 52 are further provided with a dripping net 61 located above the liquid surface of the cleaning water, and the dripping net 61 is used to intercept the moisture in the gas to reduce the water storage amount in the discharged oxygen and hydrogen, and reduce the water loss in the oxygen scrubber 51 and the hydrogen scrubber 52. The oxygen escaping from the pure water is gathered in the space above the oxygen scrubber 51 after passing through the dripping net 61, and is discharged from the oxygen discharge path 512 when the valve on the oxygen discharge path 512 is opened; similarly, the hydrogen escaping from the pure water is gathered in the space above the hydrogen scrubber 52 after passing through the dripping net 61, and is discharged from the hydrogen discharge path 522 when the valve on the hydrogen discharge path 522 is opened.

[0027] In this embodiment, the oxygen washer 51 and the hydrogen washer 52 are connected to a water replenishment pipeline 7, wherein the water replenishment pipeline 7 or the lower end of the oxygen washer 51 and the hydrogen washer 52 is connected to the alkali liquid storage tank 3 through an electromagnetic regulating valve 72 to replenish and dilute the alkali liquid in the alkali liquid storage tank 3. In this embodiment, the oxygen washer 51 and the hydrogen washer 52 are components of the water replenishment and dilution module, and the pure water used for cleaning the gas in the oxygen washer 51 and the hydrogen washer 52 is transported to the alkali liquid storage tank 3 for alkali liquid concentration adjustment when the alkali liquid concentration needs to be adjusted. It should be noted that as the electrolysis reaction of water proceeds, the liquid water is reacted, which usually leads to an increase in the concentration of the alkali liquid, and thus the concentration adjustment of the alkali liquid is usually to replenish and dilute the alkali liquid so that the alkali liquid concentration is reduced. In other embodiments, the alkali liquid storage tank 3 can also be directly replenished and diluted by the water replenishment pipeline 7.

[0028] It can be known from the above description of a specific embodiment of the water electrolysis hydrogen production electrode or diaphragm test system provided by the present application that the test system provided by the present application can freely select the number of electrolysis chambers 1 according to the test needs, and each electrolysis chamber 1 shares a set of power supply units 2, alkali solution circulation, concentration adjustment and gas-liquid separation system, and each electrolysis chamber 1 has different voltage values ​​based on the different electrodes or diaphragms to be tested assembled therein, and the size of the voltage value can characterize the performance of multiple electrodes or multiple diaphragms to be tested, which is convenient for intuitively comparing the performance of different electrodes or diaphragms to be tested under the same conditions, so that the test cost can be greatly reduced while improving the test efficiency. The test system of the present application can be carried out under normal pressure, and its gas production is small, and it can be directly emptied after cleaning, without potential safety hazards. In addition, the present application monitors and adjusts the alkali solution concentration in real time, so that the alkali solution concentration fluctuation range is small, the system error is small, and the test accuracy is high.

[0029] The present application also provides a method for testing an electrode or diaphragm for producing hydrogen by electrolysis of water, which is applied to the test system as described above. The test method comprises: Assembling a plurality of electrodes or a plurality of diaphragms to be tested in the plurality of electrolysis chambers 1, wherein the plurality of electrolysis chambers 1 are electrically connected to the power supply unit 2 and the voltage monitoring unit, and the plurality of electrolysis chambers 1 are fluidically connected to the alkali solution storage tank 3 and the gas-liquid separation unit; The alkali solution storage tank 3 circulates electrolyte to the multiple electrolytic chambers 1, and the power supply unit 2 is started to supply equal current to the multiple electrolytic chambers 1 and monitor the voltage value of each electrolytic chamber 1; Monitoring the concentration of the alkali solution in the alkali solution storage tank 3, and when the concentration of the alkali solution exceeds a concentration threshold, replenishing water and diluting the alkali solution to control the concentration of the alkali solution to be maintained within a preset concentration range; The voltage value of each electrolytic chamber 1 is obtained when the system is in a stable operating state.

[0030] Furthermore, the testing method further comprises: before providing electrolyte to the multiple electrolysis chambers 1 and monitoring the alkali concentration in the alkali storage tank, heating the alkali in the alkali storage tank to a preset temperature, wherein the preset temperature is 70° C. to 90° C.

[0031] In a specific embodiment, for example, the test process for testing the performance of 4 different anode electrodes is as follows: Before the test begins, the heater 31 in the alkali solution storage tank 3 is set to preheat the alkali solution to 80°C; Disassemble the four electrolytic chambers 1, install the same cathode electrode on the cathode side of the four electrolytic chambers 1, install the same diaphragm in the middle, and install the four anode electrodes that need to be compared on the anode side; after the assembly is completed, connect the corresponding pipes and wires, and open the valves on the gas-liquid outlet pipes of each electrolytic chamber 1; Open the water replenishment valve 71 on the water replenishment pipeline 7, add pure water to 2 cm below the dripping net 61 of the oxygen washer 51 and the hydrogen washer 52, open the manual valve 511 between the oxygen separator 41 and the hydrogen separator 42 and the corresponding washer, and start the circulation pump 32 and the alkali solution concentration monitoring module 33 when the alkali solution temperature rises to 80°C, set the alkali solution concentration control to 30%, and when the alkali solution concentration rises to 30.5%, automatically open the electromagnetic regulating valve 72 for water replenishment, and automatically close the electromagnetic regulating valve 72 until the alkali solution concentration returns to 30%, and open the valves on the oxygen discharge path 512 and the hydrogen discharge path 522; Start the power supply unit 2 and set it to constant current mode. After the system runs stably, compare the voltage values ​​of different electrolysis chambers 1. The electrolysis chamber 1 with a lower voltage value has a higher hydrogen production performance, which means that the performance of its anode electrode is better.

[0032] Similarly, based on the above-mentioned similar testing process, when different cathode electrodes or diaphragms are used in the electrolysis chamber 1, the performance of the newly developed cathode electrode or diaphragm can be verified.

[0033] It is understandable that in the present application scheme, a test process can realize multiple electrolysis chambers 1 to test multiple products to be tested under equal current power supply and equal alkali solution conditions. Compared with multiple parallel tests on each product to be tested, the test time can be significantly shortened, and the errors caused by human factors during the test and the environmental errors during multiple parallel tests can be reduced. In addition, the present application can strictly control the alkali solution concentration in real time by implementing online monitoring and adjustment of the alkali solution concentration, so as to avoid the accuracy of the experimental results being affected by too large fluctuations in the alkali solution concentration.

[0034] The test system and test method provided by the present application, multiple electrolysis chambers 1 share a set of power supply units 2, alkali solution circulation, concentration adjustment and gas-liquid separation systems, and each electrolysis chamber 1 has different voltage values ​​based on the different electrodes or diaphragms to be tested assembled therein, and the size of the voltage value can characterize the performance of multiple electrodes or multiple diaphragms to be tested, which is convenient for intuitively comparing the performance of different electrodes or diaphragms to be tested under the same conditions, so that the test cost can be greatly reduced while improving the test efficiency. The test system and test method of the present application can be carried out under normal pressure, and its gas production is small, and it can be directly emptied after cleaning without potential safety hazards. In addition, the present application monitors and adjusts the alkali solution concentration in real time, so that the alkali solution concentration fluctuation range is small, the system error is small, and the test accuracy is high.

[0035] The present invention is described by several specific embodiments, and it should be understood by those skilled in the art that various changes and equivalent substitutions may be made to the present invention without departing from the scope of the present invention. In addition, various modifications may be made to the present invention for specific situations or specific circumstances without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but should include all implementation methods falling within the scope of the claims of the present invention.

Claims

1. A water electrolysis hydrogen production electrode or diaphragm testing system, characterized in that: The test system comprises: A plurality of electrolysis chambers, each of the electrolysis chambers being configured to be detachably equipped with an electrode or a diaphragm; A power supply unit, electrically connected to the plurality of electrolysis chambers, to supply power to the plurality of electrolysis chambers in an isotropic manner; an alkali solution storage tank connected to the plurality of electrolysis chambers to provide electrolyte to the plurality of electrolysis chambers; a gas-liquid separation unit connected to the plurality of electrolysis chambers to collect the gases generated by the plurality of electrolysis chambers and separate the electrolyte carried in the gases; and A concentration regulating unit is connected to the alkali solution storage tank, and the concentration regulating unit includes an alkali solution concentration monitoring module for monitoring the alkali solution concentration in the alkali solution storage tank, and a water replenishment and dilution module for diluting the alkali solution in the alkali solution storage tank; Wherein, the multiple electrolytic chambers are respectively connected to voltage monitoring units to detect the voltage value of each electrolytic chamber under equal current power supply and equal alkaline solution conditions.

2. The test system according to claim 1, characterized in that: The alkali solution storage tank and the multiple electrolysis chambers are connected via a liquid inlet pipeline, which includes a main pipe and multiple branch pipes connected between the main pipe and the multiple electrolysis chambers, wherein the main pipe is connected to a circulation pump and the alkali solution concentration monitoring module, and each branch pipe is provided with an electromagnetic flow control valve.

3. The test system according to claim 1, characterized in that: The gas-liquid separation unit includes an oxygen separator and a hydrogen separator. The oxygen output sides of the multiple electrolysis chambers are connected to the oxygen separator, and the hydrogen output sides of the multiple electrolysis chambers are connected to the hydrogen separator. The oxygen separator and the hydrogen separator are provided with liquid level display tubes for observing the liquid levels therein.

4. The test system according to claim 3, characterized in that: The height of the liquid level display tube is not less than 10 cm, and the distance between the two ends of the liquid level display tube and the end of the separator where the liquid level display tube is located is not less than 4 cm.

5. The test system according to claim 3, characterized in that: The lower ends of the oxygen separator and the hydrogen separator are connected to the alkali solution storage tank via switch valves.

6. The test system according to claim 3, characterized in that: The gas-liquid separation unit includes an oxygen washer and a hydrogen washer for containing cleaning water, the upper end of the oxygen separator is connected to the oxygen washer, and the upper end of the hydrogen separator is connected to the hydrogen washer, wherein the oxygen washer and the hydrogen washer are further provided with a dripping net located above the liquid surface of the cleaning water.

7. The test system according to claim 6, characterized in that: The oxygen scrubber and the hydrogen scrubber are connected to a water replenishment pipeline, wherein the water replenishment pipeline or the lower end of the oxygen scrubber and the hydrogen scrubber is connected to the alkali solution storage tank through an electromagnetic regulating valve to replenish and dilute the alkali solution in the alkali solution storage tank.

8. The test system according to claim 2, characterized in that: The alkali solution storage tank comprises a heater for heating the alkali solution therein.

9. A method for testing an electrode or diaphragm for producing hydrogen by electrolysis of water, applied to a testing system as claimed in any one of claims 1 to 7, characterized in that: The test method includes: Assembling a plurality of electrodes or a plurality of diaphragms to be tested in the plurality of electrolysis chambers, wherein the plurality of electrolysis chambers are electrically connected to the power supply unit and the voltage monitoring unit, and the plurality of electrolysis chambers are fluidically connected to the alkali solution storage tank and the gas-liquid separation unit; The alkali solution storage tank circulates electrolyte to the multiple electrolytic chambers, starts the power supply unit to supply equal current to the multiple electrolytic chambers and monitors the voltage value of each electrolytic chamber; Monitoring the concentration of the alkali solution in the alkali solution storage tank, and when the concentration of the alkali solution exceeds a concentration threshold, replenishing water and diluting the alkali solution to control the concentration of the alkali solution to be maintained within a preset concentration range; Obtain the voltage value of each electrolytic chamber when the system is in stable operation state.

10. The testing method according to claim 9, characterized in that: The testing method further includes: before providing electrolyte to the plurality of electrolysis chambers and monitoring the concentration of alkali solution in the alkali solution storage tank, heating the alkali solution in the alkali solution storage tank to a preset temperature, wherein the preset temperature is 70° C. to 90° C.

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