A multi-channel test bench

Abstract

The utility model provides a kind of multi-channel test bench, including rack and power supply, rack installs horizontal working condition comparison test device and longitudinal working condition comparison test device, horizontal working condition comparison test device includes first water supply component and multiple first electrolytic cell, multiple first electrolytic cell is connected with first water supply component;Multiple first electrolytic cell is installed on the mesa of rack, power supply is powered for first electrolytic cell and first water supply component;Longitudinal working condition comparison test device includes multiple second electrolytic cell and multiple second water supply component, and each second electrolytic cell connects a second water supply component;Multiple second electrolytic cell is installed on the mesa of rack, power supply is powered for second electrolytic cell and second water supply component. Multiple first electrolytic cell uses same water supply component water supply, can ensure that each first electrolytic cell electrolyte composition is consistent, excludes the influence of electrolyte microscopic substance difference on test result, and the test comparison of horizontal working condition and longitudinal working condition is realized in same test bench.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology through water electrolysis, and in particular to a multi-channel test bench. Background Technology

[0002] In the process of hydrogen production through water electrolysis, testing is a crucial step in ensuring the performance of the electrolyzer and optimizing hydrogen production efficiency. Accurate testing helps researchers evaluate the performance parameters of the electrolyzer, such as current efficiency, energy consumption, and hydrogen purity. For example, testing can determine the operating efficiency of the electrolyzer under different operating conditions, thereby optimizing its design and operating conditions, such as catalysts and electrode structures. Furthermore, testing provides data support for durability studies of the electrolyzer, helping to address stability issues during long-term operation. In practical applications, test data is essential for the commercialization and large-scale development of water electrolysis hydrogen production technology.

[0003] While testing is crucial for hydrogen production via water electrolysis, current electrolysis testing equipment has significant functional limitations. Most existing devices can only perform basic performance tests on a single electrolyzer, such as measuring fundamental macroscopic parameters like current and voltage. However, these basic macroscopic parameters cannot accurately assess the true performance of the electrolyzer components. For example, the presence of ppm-level Fe2+ / 3+ in the electrolyte can significantly impact the anolyte OER reaction and adversely affect the ion-exchange membrane. Existing devices cannot ensure absolute consistency of impurity ions in the electrolyte across different electrolyzers. Furthermore, existing devices are insufficient for testing the durability and dynamic performance of electrolyzers, failing to meet testing requirements under complex operating conditions. Therefore, developing a device capable of comprehensively and accurately testing electrolyzer performance is of great significance for advancing water electrolysis hydrogen production technology. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a multi-channel test bench.

[0005] This utility model is achieved using the following technical solution: a multi-channel test bench, wherein a transverse working condition comparison test device and a longitudinal working condition comparison test device are installed on the frame. The lateral working condition comparison test device includes a first water supply component and multiple first electrolytic cells, all of which are connected to the first water supply component; the multiple first electrolytic cells are installed on the platform of the frame, and the power supply provides power to the first electrolytic cells and the first water supply component; The longitudinal working condition comparison test device includes multiple second electrolytic cells and multiple second water supply components, with each second electrolytic cell connected to a second water supply component; the multiple second electrolytic cells are installed on the platform of the frame, and the power supply provides power to the second electrolytic cells and the second water supply components.

[0006] Preferably, the first water supply assembly includes multiple first water supply pipelines, a first gas-liquid separator, and a first flow meter. Each first electrolytic cell is connected to the outlet of the first gas-liquid separator via the first water supply pipeline, and the first flow meter is installed on the first water supply pipeline.

[0007] Preferably, the anode exhaust port of the first electrolytic cell is connected to an oxygen exhaust pipe, and the oxygen exhaust pipe is equipped with an oxygen hydrogen measuring instrument for detecting the oxygen hydrogen content in the entire section or a section thereof; a first anode exhaust pipe is connected between the anode exhaust port of the first electrolytic cell and the oxygen exhaust pipe; the first gas-liquid separator is provided with an inlet port and an outlet port; the exhaust port of the first anode exhaust pipe is connected to the inlet port of the first gas-liquid separator; the outlet port of the first gas-liquid separator is connected to the oxygen exhaust pipe; the outlet end of the first water supply pipeline is connected to the anode side of the first electrolytic cell; and the first gas-liquid separator is provided with a water inlet connected to a water supply tank.

[0008] Preferably, the first water supply pipeline is further equipped with a thermocouple and a first water pump; the first gas-liquid separator is equipped with a first level gauge; the cathode exhaust port of the first electrolytic cell is connected to a hydrogen exhaust pipe, and the hydrogen exhaust pipe is equipped with a hydrogen flow meter for detecting the hydrogen flow rate of the entire section or one section; a first cathode exhaust pipe is connected between the cathode exhaust port of each first electrolytic cell and the hydrogen exhaust pipe, and a first back pressure valve is provided on the first cathode exhaust pipe.

[0009] Preferably, a sealing gasket is provided between the cathode and anode of each first electrolytic cell, and a sealing gasket is provided between the cathode and anode of each second electrolytic cell; a tension sensor is provided on the end plate of each first electrolytic cell, and a tension sensor is installed on the end plate of each second electrolytic cell, so as to detect the sealing performance of the first electrolytic cell and the second electrolytic cell.

[0010] Preferably, the second water supply assembly includes a second water supply pipeline and a second gas-liquid separator. Each second electrolytic cell is connected to the outlet of its corresponding second gas-liquid separator via the second water supply pipeline. The anode exhaust port of the second electrolytic cell is connected to an oxygen exhaust pipe, which is equipped with an oxygen-hydrogen meter for detecting the hydrogen content in the oxygen of the entire section or a section thereof. A second anode exhaust pipe is connected between the anode exhaust port of the second electrolytic cell and the oxygen exhaust pipe. The second gas-liquid separator has an inlet port and an outlet port. The exhaust port of the second anode exhaust pipe is connected to the inlet port of the second gas-liquid separator, and the outlet port of the second gas-liquid separator is connected to the oxygen exhaust pipe. The outlet end of the second water supply pipeline is connected to the anode side of the second electrolytic cell, and the second gas-liquid separator has a water inlet connected to a water supply tank.

[0011] Preferably, the second water supply pipeline is also equipped with a thermocouple and a second water pump; the second gas-liquid separator is equipped with a second level gauge; the cathode exhaust port of the second electrolytic cell is connected to a hydrogen exhaust pipe, and the hydrogen exhaust pipe is equipped with a hydrogen flow meter for detecting the hydrogen flow rate of the entire section or one section.

[0012] Preferably, a second cathode exhaust pipe is connected between the cathode exhaust port of each second electrolytic cell and the hydrogen exhaust pipe, and a second back pressure valve is provided on the pipeline of the second cathode exhaust pipe; wherein at least one of the second cathode exhaust pipes is also connected to a third gas-liquid separator, and a third water supply pipeline is connected between the water outlet of the third gas-liquid separator and the second electrolytic cell connected to the corresponding second cathode exhaust pipe, and the third gas-liquid separator is provided with a water inlet connected to a water supply tank.

[0013] Preferably, the third water supply pipeline is equipped with a third flow meter, a thermocouple, and a third water pump, and the outlet end of the third water supply pipeline is connected to the cathode side of the second electrolytic cell.

[0014] Preferably, a third back pressure valve is also connected between the outlet port of the second gas-liquid separator connected to the second electrolytic cell of the third gas-liquid separator and the oxygen exhaust pipe.

[0015] Preferably, a second flow meter is provided on the second water supply pipeline connected to the second electrolytic cell of the third gas-liquid separator.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a multi-channel test bench, which, compared with the prior art, has at least the following technical effects: 1. Multiple first electrolytic cells of the lateral working condition comparison test device share a first water supply component, making the water supply conditions consistent (uniform water flow, temperature, electrolyte, etc.), ensuring that the electrolyte composition in each first electrolytic cell is consistent (e.g., consistent Fe2+ / 3+ content in the electrolyte, consistent pH value, consistent conductivity, etc.), eliminating the influence caused by different micro-material contents in the electrolyte, making the test data more accurate and comprehensively reflect the true performance of the first electrolytic cell, and facilitating the study of the internal structure of the electrolytic cell (such as electrode materials, diaphragm performance) on the effect of... The impact of electrolysis performance provides data support for the optimized design of electrolyzers. Simultaneously, it allows understanding of the hydrogen production effect when different membrane or electrode materials are used in the first electrolyzer. The longitudinal operating condition comparison test device employs multiple second electrolyzers with the same parameters, each using a separate second water supply component. Each second electrolyzer can be individually supplied with different water supply conditions, such as varying flow rates and temperatures. This allows for simultaneous testing and comparison of the macroscopic performance changes of the second electrolyzers under different operating conditions, such as measuring macroscopic performance indicators like current, voltage, and power. By comparing and analyzing the macroscopic parameters of the same electrolyzer under different operating conditions, the operating efficiency and stability of the electrolyzer can be evaluated, providing crucial information for performance optimization and fault diagnosis.

[0017] 2. This practical prototype uses a horizontal operating condition comparison test device and a vertical operating condition comparison test device for testing. The combination of the two makes up for the functional deficiencies of water electrolysis test devices on the market, and realizes the simultaneous performance of horizontal and vertical operating condition comparison tests. The synergistic application of the horizontal and vertical operating condition comparison test devices can comprehensively and systematically evaluate the performance of the electrolyzer, providing strong support for the research and development and optimization of water electrolysis hydrogen production technology.

[0018] 3. A first flow meter is installed on the first water supply pipeline of the first water supply component to detect the water inflow of the first water supply pipeline in real time, so as to facilitate precise control of the water supply of each electrolytic cell in the horizontal working condition comparison test device and ensure the stability and consistency of the water supply.

[0019] 4. The gas discharged from the anode of the first electrolytic cell first enters the first gas-liquid separator for separation treatment, and the separated gas is then discharged into the oxygen exhaust pipe to ensure the dryness of the discharged gas; the first back pressure valve is set to effectively monitor the pressure of the pipeline of the transverse working condition comparison test device, which helps to eliminate danger in time.

[0020] 5. In the longitudinal operating condition comparison test, each electrolyzer can receive precise and independent water supply control, which facilitates accurate evaluation of the performance of each electrolyzer under corresponding operating conditions under longitudinal comparison with different parameter settings; the second water supply component is equipped with a second water supply pipeline and a second gas-liquid separator, and each second gas-liquid separator is connected to a water replenishment tank to ensure stable water supply; the gas discharged from the anode of the second electrolyzer first enters the second gas-liquid separator for separation treatment, and the separated gas is then discharged into the oxygen exhaust pipe to ensure the dryness of the discharged gas, which is beneficial for subsequent detection of hydrogen content in oxygen, etc.

[0021] 6. A third back pressure valve is connected to the second gas-liquid separator connected to the second electrolytic cell connected to the third gas-liquid separator. This allows for effective control of the pressure in the second gas-liquid separator, ensuring that the back pressure of the gas discharged from the anode remains within a suitable range. This prevents excessive pressure fluctuations from adversely affecting the internal structure of the electrolytic cell and the electrolytic reaction.

[0022] 7. Tensile sensors are installed on the end plates of each of the first and second electrolytic cells. Sealing gaskets are provided between the anode and cathode of each electrolytic cell. When each electrolytic cell is clamped, the sealing gasket undergoes significant deformation. The stress on the sealing gasket drives its recovery, generating a thrust on the anode and cathode of the electrolytic cell. The anode and cathode of the electrolytic cell tend to move away from each other. The tensile sensors, located on the end plates of each electrolytic cell, can measure the generated tensile force, allowing for monitoring of the electrolytic cell's sealing performance. Simultaneously, the influence of different sealing gasket materials on the sealing performance of the electrolytic cell can be measured and compared, helping to select the most suitable sealing gasket material. Furthermore, by setting the same sealing gasket material and the same tensile force when installing the first and second electrolytic cells, pressure uniformity and consistency are ensured, avoiding the influence of different tensile forces on test results. This results in more accurate and comprehensive test data during comparative measurements. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a multi-channel test bench according to this utility model.

[0024] Figure 2 This is a pipeline principle block diagram of a multi-channel test bench according to this utility model.

[0025] Reference numerals: 1. Frame; 2. First electrolytic cell; 3. First water supply assembly; 31. First water supply pipeline; 32. First gas-liquid separator; 321. First level gauge; 33. First water pump; 34. First flow meter; 4. Second electrolytic cell; 5. Second water supply assembly; 50. Second water supply pipeline; 51. Second gas-liquid separator; 511. Second level gauge; 52. Second water pump; 53. Second flow meter; 55. Third gas-liquid separator; 551. Third level gauge; 56. Third water supply pipeline; 57. Third flow meter; 59. Third water pump; 6. Make-up water tank; 7. Hydrogen flow meter; 8. Oxygen-hydrogen measuring instrument; 9. First back pressure valve; 10. Second back pressure valve; 11. Third back pressure valve; 12. Thermocouple; 13. Safety valve; 14. Power supply; 15. Tension sensor. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Please see Figures 1 to 2 A multi-channel test bench includes a frame 1 and a power supply. A transverse working condition comparison test device and a longitudinal working condition comparison test device are mounted on the frame 1. The lateral working condition comparison test device includes a first water supply component 3 and a plurality of first electrolytic cells 2, all of which are connected to the first water supply component 3; the plurality of first electrolytic cells 2 are installed on the platform of the frame 1, the first water supply component 3 is installed in the frame, and the power supply 14 supplies power to the first electrolytic cells 2 and the first water supply component 3. The longitudinal operating condition comparison test device includes multiple second electrolyzers 4 and multiple second water supply components 5, with each second electrolyzer 4 connected to a set of second water supply components 5. The multiple second electrolyzers 4 are mounted on the platform of the frame 1, and the second water supply components 5 are mounted within the frame 1. The power supply 14 supplies power to the second electrolyzers 4 and the second water supply components 5. In the transverse operating condition comparison test device, multiple first electrolyzers 2 share a single first water supply component 3, ensuring consistent water supply conditions (uniform water flow rate, temperature, electrolyte, etc.). This guarantees that the electrolyte composition in each first electrolyzer is consistent (e.g., consistent Fe2+ / 3+ content, consistent pH value, consistent conductivity, etc.), eliminating the influence of different micro-material contents in the electrolyte. This makes the test data more accurate and comprehensively reflects the true performance of the first electrolyzer. Simultaneously, it allows for understanding the hydrogen production effect of different membrane materials or electrode materials in the first electrolyzer, facilitating research on the internal structure of the electrolyzer (e.g., electrode materials, membrane properties). The test device assesses the impact of water electrolysis on electrolysis performance, providing data support for the optimized design of electrolyzers. The longitudinal operating condition comparison test device employs multiple second electrolyzers 4 with the same parameters, each using a second water supply component 5. Each second electrolyzer is individually water-supplyed, allowing for different water supply conditions such as varying flow rates and temperatures. This enables simultaneous testing and comparison of the macroscopic performance changes of the second electrolyzers under different operating conditions, such as measuring macroscopic performance indicators like current, voltage, and power. By comparing and analyzing the macroscopic parameters of the same electrolyzer under different operating conditions, the operating efficiency and stability of the electrolyzer can be evaluated, providing crucial data for performance optimization and fault diagnosis. The combination of the transverse and longitudinal operating condition comparison test devices overcomes the functional deficiencies of commercially available water electrolysis test devices, providing a comprehensive and systematic evaluation of electrolyzer performance and strong support for the research and optimization of water electrolysis hydrogen production technology. Both the first and second electrolyzers are powered by DC power. The power supply provides power to the first and second water supply components, specifically to the internal pumps and other components.

[0028] Please see Figures 1 to 2 Preferably, the first water supply component 3 includes multiple first water supply pipes 31, a first gas-liquid separator 32, and a first flow meter 34. Each first electrolytic cell 2 is connected to the outlet of the first gas-liquid separator 32 via a first water supply pipe 31, and the first flow meter 34 is installed on the first water supply pipe 31. The first flow meter 34 installed on the first water supply pipe 31 of the first water supply component 3 allows for real-time detection of the water inflow into the first water supply pipe 31, facilitating precise control of the water supply status of each electrolytic cell in the horizontal operating condition comparison test device, and ensuring the stability and consistency of the water supply.

[0029] Please see Figures 1 to 2Preferably, the anode exhaust port of the first electrolytic cell 2 is connected to an oxygen exhaust pipe, and the oxygen exhaust pipe is equipped with an oxygen-hydrogen measuring instrument 8 for detecting the oxygen-hydrogen content of the entire section or a section thereof; a first anode exhaust pipe is connected between the anode exhaust port of the first electrolytic cell 2 and the oxygen exhaust pipe; the first gas-liquid separator 32 is provided with an inlet port and an outlet port; the exhaust port of the first anode exhaust pipe is connected to the inlet port of the first gas-liquid separator 32; and the outlet port of the first gas-liquid separator 32 is connected to the oxygen exhaust pipe; the outlet end of the first water supply pipeline is connected to the anode side of the first electrolytic cell 2; and the first gas-liquid separator 32 is provided with a water inlet connected to a water supply tank 6. The gas discharged from the anode of the first electrolytic cell 2 first enters the first gas-liquid separator 32 for separation treatment, and the separated gas is then discharged into the oxygen exhaust pipe to ensure the dryness of the discharged gas.

[0030] Please see Figures 1 to 2 Preferably, the first water supply pipeline 31 is further equipped with a thermocouple 12 and a first water pump 33; the cathode exhaust port of the first electrolytic cell 2 is connected to a hydrogen exhaust pipe, and a hydrogen flow meter 7 is installed in the hydrogen exhaust pipe to detect the hydrogen flow rate of the entire section or a section thereof; a first liquid level gauge 321 is installed in the first gas-liquid separator 32; a first cathode exhaust pipe is connected between the cathode exhaust port of each first electrolytic cell 2 and the hydrogen exhaust pipe, and a first back pressure valve 9 is installed on the pipeline of the first cathode exhaust pipe. Adding a thermocouple 12 and a first water pump 33 to the first water supply pipeline 31 enables dynamic control of the water supply temperature and pressure; the thermocouple 12 can monitor the water supply temperature and adjust it to a suitable temperature according to different working conditions, which is beneficial to the electrolysis reaction; the first water pump 33 can accurately control the water supply flow rate and pressure, meeting the precise requirements of water supply power under different test conditions. The first back pressure valve 9 effectively monitors the pressure of the pipeline of the transverse working condition comparison test device, helping to eliminate dangers in a timely manner.

[0031] Please see Figures 1 to 2Preferably, a sealing gasket is provided between the first electrolytic cell 2 and the second electrolytic cell 4 and their respective anodes and cathodes; a tensile sensor is installed on each of the first electrolytic cell 2 and each of the second electrolytic cell 4 and their respective end plates to detect the sealing performance of the first electrolytic cell 2 or the second electrolytic cell 4. With a tensile sensor on the end plate of each first and second electrolytic cell, and a sealing gasket between the anode and cathode of each first and second electrolytic cell, the sealing gasket undergoes significant deformation after each electrolytic cell is clamped. The stress on the sealing gasket drives its recovery, generating a thrust on the anode and cathode of the electrolytic cell. The anode and cathode of the electrolytic cell tend to move away from each other. The tensile sensor, located on the end plate of each electrolytic cell, can measure the generated tensile force, monitor the sealing performance of the electrolytic cell, and also measure and compare the influence of different sealing gasket materials on the sealing performance of the electrolytic cell, helping to select the most suitable sealing gasket material (e.g., selected from alkaline PDFE, rubber, silicone, fluorine-containing materials, etc.). Furthermore, by using the same material for the sealing gaskets and applying the same tensile force when installing the first and second electrolytic cells, the uniformity and consistency of pressure are ensured. This prevents the test results from being affected by differences in tensile force, resulting in more accurate and comprehensive test data during comparative measurements. The electrolyte may cause different materials of sealing gaskets to age at different rates. As the gaskets age, their ability to deform and mold decreases, leading to changes in the tensile sensor's measurement data after compression. Therefore, based on the monitoring data from the tensile sensor, it is possible to determine which sealing gasket material is more suitable for electrolytes with different compositions, and then use it accordingly.

[0032] Please see Figures 1 to 2Preferably, the second water supply assembly 5 includes a second water supply pipeline 50 and a second gas-liquid separator 51. Each second electrolytic cell 4 is connected to the outlet of the corresponding second gas-liquid separator 51 via the second water supply pipeline 50. The anode exhaust port of the second electrolytic cell 4 is connected to an oxygen exhaust pipe, which is equipped with an oxygen-hydrogen measuring instrument 8 for detecting the oxygen-hydrogen content in the entire section or a section thereof. A second anode exhaust pipe is connected between the anode exhaust port of the second electrolytic cell 4 and the oxygen exhaust pipe. The second gas-liquid separator 51 is provided with an inlet port and an outlet port. The exhaust port of the second anode exhaust pipe is connected to the inlet port of the second gas-liquid separator 51, and the outlet port of the second gas-liquid separator 51 is connected to the oxygen exhaust pipe. The outlet end of the second water supply pipeline is connected to the anode side of the second electrolytic cell 4, and the second gas-liquid separator 51 is provided with a water replenishment port connected to a water replenishment tank 6. In the longitudinal operating condition comparison test, each second electrolyzer 4 can receive precise and independent water supply control, which facilitates accurate evaluation of the performance of each second electrolyzer under corresponding operating conditions under longitudinal comparison with different parameter settings. The second water supply component 5 is equipped with a second water supply pipeline 50 and a second gas-liquid separator 51. Each second gas-liquid separator 51 is connected to a water replenishment tank 6 to ensure stable water supply. The gas discharged from the anode of the second electrolyzer 4 first enters the second gas-liquid separator 51 for separation treatment. The separated gas is then discharged into the oxygen exhaust pipe to ensure the dryness of the discharged gas, which is beneficial for subsequent detection of hydrogen content in oxygen, etc. A switching valve is provided in the oxygen exhaust pipe to switch the connection between different test channels and the oxygen hydrogen measuring instrument 8. The switching valve can be set to cycle switching or manually select the connection between the oxygen hydrogen measuring instrument 8 and different test channels. For example, each test channel can be connected for five minutes. The oxygen hydrogen measuring instrument 8 transmits the measurement data to the host computer. When the oxygen hydrogen content in the test channel does not change within the set time after each switch, it indicates that the electrolyzer in that test channel is operating stably.

[0033] Please see Figures 1 to 2 Preferably, the second water supply pipeline 50 is further equipped with a thermocouple 12 and a second water pump 52; the second gas-liquid separator 51 is equipped with a second level gauge 511; the cathode exhaust port of the second electrolytic cell 4 is connected to a hydrogen exhaust pipe, and the hydrogen exhaust pipe is equipped with a hydrogen flow meter 7 for detecting the hydrogen flow rate of the entire section or a section thereof. The installation of the thermocouple 12 and the second water pump 52 on the second water supply pipeline 50 enables precise control of the water supply temperature and pressure of the second electrolytic cell 4, meeting the water supply needs under different longitudinal operating conditions and ensuring the stable operation of the electrolytic cell.

[0034] Please see Figures 1 to 2Preferably, a second cathode exhaust pipe is connected between the cathode exhaust port of each second electrolytic cell 4 and the hydrogen exhaust pipe, and a second back pressure valve 10 is provided on the second cathode exhaust pipe; at least one of the second cathode exhaust pipes is also connected to a third gas-liquid separator 55 (the second back pressure valve 10 can monitor the pressure in the third gas-liquid separator 55 in real time, that is, monitor the cathode pressure of the second electrolytic cell 4), and a third water supply pipe 56 is connected between the outlet of the third gas-liquid separator 55 and the second electrolytic cell 4 connected to the corresponding second cathode exhaust pipe, and the third gas-liquid separator 55 is provided with a water inlet connected to a water supply tank 6. The second back pressure valve 10 is set to effectively monitor the pressure of the pipeline of the longitudinal working condition comparison test device and can eliminate danger in time. A third gas-liquid separator 55 is installed and connected to the corresponding third water supply pipeline 56, the second cathode exhaust pipe, the second electrolytic cell 4, and the water replenishment tank 6. It can separate the gas discharged from the cathode of the second electrolytic cell 4 into gas and liquid. The separated water can be recycled back to the electrolytic cell, improving water resource utilization and reducing production costs. At the same time, it, together with the second gas-liquid separator 51, the second water supply pipeline 50, and the second water pump 52, forms a dual-sided water supply to at least one of the second electrolytic cells 4.

[0035] Please see Figures 1 to 2 Preferably, the third water supply pipeline 56 is equipped with a third flow meter 57, a thermocouple 12, and a third water pump 59, and the outlet end of the third water supply pipeline 56 is connected to the cathode side of the second electrolytic cell 4. The configuration of the third flow meter 57, thermocouple 12, and third water pump 59 on the third water supply pipeline 56 allows for precise control of the flow rate, temperature, and pressure of the water separated by the third gas-liquid separator 55 when it is returned to the electrolytic cell; comprehensively ensuring the quality and stability of the returned water supply, further optimizing the operating conditions of the electrolytic cell, improving hydrogen production efficiency and quality, and simultaneously enabling test data to more accurately reflect the performance of the electrolytic cell under actual operating conditions.

[0036] Please see Figures 1 to 2 Preferably, a third back pressure valve 11 is also connected between the outlet port of the second gas-liquid separator 51 connected to the second electrolytic cell 4 connected to the third gas-liquid separator 55 and the oxygen exhaust pipe. Connecting the third back pressure valve 11 to the second gas-liquid separator 51 connected to the second electrolytic cell 4 connected to the third gas-liquid separator 55 allows for effective control of the pressure of the second gas-liquid separator 51. Similarly, connecting the second back pressure valve 10 between the outlet port of the third gas-liquid separator 51 and the hydrogen exhaust pipe allows for effective control of the pressure of the third gas-liquid separator 51, maintaining the back pressure of the gases discharged from the anode and cathode within a suitable range and preventing excessive pressure fluctuations from adversely affecting the internal structure of the electrolytic cell and the electrolytic reaction.

[0037] Please see Figures 1 to 2Preferably, a second flow meter 53 is provided on the second water supply pipeline 50 connected to the second electrolytic cell 4 connected to the third gas-liquid separator 55. In the longitudinal operating condition comparison test, the second electrolytic cell 4, which is connected to the third back pressure valve 11, has its water inflow monitored in real time by the third flow meter 57, which facilitates accurate evaluation of the performance of each electrolytic cell under corresponding operating conditions under longitudinal comparison with different parameter settings.

[0038] Please see Figures 1 to 2 Preferably, this embodiment employs an eight-channel test, i.e., eight test electrolytic cells. The lateral comparison test device has four test channels, namely test channels 2, 4, 6, and 8, which share a first gas-liquid separator 32. The longitudinal comparison test device has another four test channels, namely test channels 1, 3, 5, and 7, each using a second gas-liquid separator 51. Test channels 5 and 7 are also connected to a third gas-liquid separator 55. In test channel 7, a thermocouple 12 is installed on the second cathode exhaust pipe and the second anode exhaust pipe of the second electrolytic cell 4. A safety valve 13 is also installed between the outlet port of the second gas-liquid separator 51 and the inlet port of the third back pressure valve 11. A safety valve 13 is also connected to the second cathode exhaust pipe between the outlet port of the third gas-liquid separator 55 and the inlet port of the second back pressure valve 10. In test channel 5 (e.g., Figure 2 The pipeline connected to the second electrolytic cell 4 from the top on the left is equipped with a safety valve 13 on the second cathode exhaust pipe and a safety valve 13 on the second anode exhaust pipe. A safety valve 13 is also installed between the inlet port of the third back pressure valve 11 on the second cathode pipe of the second gas-liquid separator 51. The second back pressure valve 10 installed between the outlet port of the third gas-liquid separator 55 and the hydrogen exhaust pipe, and the third back pressure valve 11 installed between the outlet port of the second gas-liquid separator 51 and the oxygen exhaust pipe are all manual back pressure valves. Channels 2, 4, 6, and 8 (e.g., Figure 2 The four first electrolytic cells 2 connected to the right side of the middle section share a single separator, a level gauge, and a back pressure valve. The advantage is that they are supplied with water from the same pure water tank (the second gas-liquid separator connected to the makeup water tank 6), and the same separator and level gauge ensure consistent basic parameters, facilitating comparison under the same operating conditions and improving reliability. Channels 1 and 3 (e.g., Figure 2The pipelines connecting the third and fourth electrolytic cells (from top to bottom) on the left side are single-sided water supply and single-sided back pressure (each channel corresponds to 1 level gauge and 1 separator, for a total of 2 level gauges and 2 separators). Channels 5 and 7 are double-sided water supply and double-sided back pressure (each channel corresponds to 2 level gauges and 2 separators, for a total of 4 level gauges and 4 separators). Channel 7 uses 2 intelligent back pressure valves without pressure gauges. A preset value is set on the back pressure valve. When the pressure on the back pressure valve exceeds the preset value, the data is fed back to the PLC, which intelligently controls and adjusts the back pressure valve. Channels 2, 4, 6, and 8 (1 back pressure valve), channel 1 (1 back pressure valve), channel 3 (1 back pressure valve), and channel 5 (2 back pressure valves) are all manual back pressure valves with pressure gauges, and are manually adjustable. When parallel control experiments are needed to evaluate materials (diaphragm, electrode materials), channels 2, 4, 6, and 8 are used (all operating and process conditions are consistent across these four channels, except for material verification; all four channels are supplied by a single primary water supply component for easy and consistent control of experimental adjustments, except for material testing). When conducting electrolytic cell process experiments, such as studying the diaphragm and electrode resistance to poisoning under different pressures, channels 1, 3, 5, and 7 can be used (each channel is supplied by a separate secondary water supply component for easy adjustment of different water flow rates, temperatures, etc., and this is not a limitation). Channel 7 can achieve precise automatic pressure control according to a program. Of course, four, five, six, seven, nine, ten, fifteen, and twenty channels can also be designed, without limitation, as long as they can provide comprehensive coverage for both horizontal and vertical comparisons.

[0039] The horizontal operating condition comparison test device supplies water to multiple first electrolytic cells (electrolytic cells connected by channels 2, 4, 6, and 8) via the same first water supply component. This ensures that the content of metal ions (such as iron ions and nickel ions) in the electrolyte of each first electrolytic cell is consistent, as well as that of parameters such as pH value and conductivity. This eliminates the influence of different microscopic substances in the electrolyte and controls the consistency of parameters such as temperature and back pressure. This allows the test structure to comprehensively and accurately test the performance of the electrolytic cells, thereby accurately reflecting the influence of different electrode materials and diaphragm performance on the electrolysis performance of the first electrolytic cells. This provides data support for the optimized design of the electrolytic cells and helps engineers analyze the performance differences of different electrolytic cell components under the same operating conditions (excluding the influence of microscopic parameters), thus optimizing the electrolytic cell components.

[0040] The longitudinal operating condition comparison test device employs multiple second electrolyzers with identical parameters, each using a separate second water supply component. Each second electrolyzer can be individually supplied with different water conditions, such as varying flow rates and temperatures, facilitating individual adjustment of each cell under different temperature and flow rate conditions. By measuring macroscopic parameters such as current, voltage, power, current density, and energy consumption, the device understands the macroscopic performance changes of the second electrolyzers, evaluating their adaptability and stability. Furthermore, by measuring indicators such as hydrogen production and purity, the device assesses the system efficiency and operating costs of each second electrolyzer. Monitoring changes in macroscopic parameters allows for the timely detection of potential faults, providing a basis for cell maintenance and optimization, and ultimately optimizing the macroscopic operating parameters. The synergistic application of the transverse and longitudinal operating condition comparison test devices enables a comprehensive and systematic evaluation of electrolyzer performance, providing strong support for the research and optimization of water electrolysis hydrogen production technology.

[0041] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0042] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0043] Finally, the above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0044] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this utility model should also be considered within the scope of protection of this utility model.

Claims

1. A multi-channel test bench, comprising a frame and a power supply, characterized in that: The frame is equipped with a lateral working condition comparison test device and a longitudinal working condition comparison test device. The lateral working condition comparison test device includes a first water supply component and multiple first electrolytic cells, all of which are connected to the first water supply component; the multiple first electrolytic cells are installed on the platform of the frame, and the power supply provides power to the first electrolytic cells and the first water supply component; The longitudinal working condition comparison test device includes multiple second electrolytic cells and multiple second water supply components, with each second electrolytic cell connected to a second water supply component; Multiple second electrolytic cells are mounted on the platform of the frame, and the power supply provides power to the second electrolytic cells and the second water supply assembly.

2. The multi-channel test bench according to claim 1, characterized in that: The first water supply assembly includes multiple first water supply pipelines, a first gas-liquid separator, and a first flow meter. Each first electrolytic cell is connected to the outlet of the first gas-liquid separator via the first water supply pipeline, and the first flow meter is installed on the first water supply pipeline.

3. A multi-channel test bench according to claim 2, characterized in that: The anode exhaust port of the first electrolytic cell is connected to an oxygen exhaust pipe, which is equipped with an oxygen hydrogen measuring instrument to detect the oxygen hydrogen content in the entire section or a section thereof. A first anode exhaust pipe is connected between the anode exhaust port of the first electrolytic cell and the oxygen exhaust pipe. The first gas-liquid separator is provided with an inlet port and an outlet port. The exhaust port of the first anode exhaust pipe is connected to the inlet port of the first gas-liquid separator, and the outlet port of the first gas-liquid separator is connected to the oxygen exhaust pipe. The outlet end of the first water supply pipeline is connected to the anode side of the first electrolytic cell, and the first gas-liquid separator is provided with a water inlet connected to a water supply tank.

4. A multi-channel test bench according to claim 2, characterized in that: The first water supply pipeline is also equipped with a thermocouple and a first water pump; the first gas-liquid separator is equipped with a first liquid level gauge; the cathode exhaust port of the first electrolytic cell is connected to a hydrogen exhaust pipe, and the hydrogen exhaust pipe is equipped with a hydrogen flow meter for detecting the hydrogen flow rate of the entire section or one section; a first cathode exhaust pipe is connected between the cathode exhaust port of each first electrolytic cell and the hydrogen exhaust pipe, and a first back pressure valve is provided on the first cathode exhaust pipe.

5. A multi-channel test bench according to claim 1, characterized in that: A sealing gasket is provided between the cathode and anode of each of the first electrolytic cells, and a sealing gasket is provided between the cathode and anode of each of the second electrolytic cells; a tension sensor is provided on the end plate of each of the first electrolytic cells, and a tension sensor is installed on the end plate of each of the second electrolytic cells, to detect the sealing performance of the first and second electrolytic cells.

6. A multi-channel test bench according to claim 1, characterized in that: The second water supply assembly includes a second water supply pipeline and a second gas-liquid separator. Each second electrolytic cell is connected to the outlet of the corresponding second gas-liquid separator via the second water supply pipeline. The anode exhaust port of the second electrolytic cell is connected to an oxygen exhaust pipe, which is equipped with an oxygen-hydrogen measuring instrument to detect the oxygen-hydrogen content in the entire section or a section thereof. A second anode exhaust pipe is connected between the anode exhaust port of the second electrolytic cell and the oxygen exhaust pipe. The second gas-liquid separator has an inlet port and an outlet port. The exhaust port of the second anode exhaust pipe is connected to the inlet port of the second gas-liquid separator, and the outlet port of the second gas-liquid separator is connected to the oxygen exhaust pipe. The outlet end of the second water supply pipeline is connected to the anode side of the second electrolytic cell, and the second gas-liquid separator has a water inlet connected to a water supply tank.

7. A multi-channel test bench according to claim 6, characterized in that: The second water supply pipeline is also equipped with a thermocouple and a second water pump; the second gas-liquid separator is equipped with a second liquid level gauge; the cathode exhaust port of the second electrolytic cell is connected to a hydrogen exhaust pipe, and the hydrogen exhaust pipe is equipped with a hydrogen flow meter for detecting the hydrogen flow rate of the entire section or one section.

8. A multi-channel test bench according to claim 7, characterized in that: Each of the second electrolytic cells has a second cathode exhaust pipe connected to the hydrogen exhaust pipe, and a second back pressure valve is provided on the second cathode exhaust pipe; at least one of the second cathode exhaust pipes is also connected to a third gas-liquid separator, and the outlet of the third gas-liquid separator is connected to the second electrolytic cell connected to the corresponding second cathode exhaust pipe via a third water supply pipe, and the third gas-liquid separator has a water inlet connected to a water supply tank.

9. A multi-channel test bench according to claim 8, characterized in that: The third water supply pipeline is equipped with a third flow meter, a thermocouple, and a third water pump. The outlet end of the third water supply pipeline is connected to the cathode side of the second electrolytic cell.

10. A multi-channel test bench according to claim 8, characterized in that: A third back pressure valve is also connected between the outlet port of the second electrolytic cell connected to the third gas-liquid separator and the oxygen exhaust pipe; a second flow meter is provided on the second water supply pipeline connected to the second electrolytic cell connected to the third gas-liquid separator.

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