Electrolytic cell bipolar plate micropore flow channel performance detection device

Abstract

The utility model discloses an electrolytic bath bipolar plate micropore flow channel performance detection device. A bipolar plate assembly is arranged on a bottom plate; the cover plate is arranged at the top of the bipolar plate assembly and is made of a transparent material; the isolation plate is arranged between the two adjacent bipolar plates, airflow simulation units are arranged on the sides, facing the bipolar plates located below the isolation plate and the cover plate, of the isolation plate and the cover plate, and airflow can be provided for the anode sides of the corresponding bipolar plates through the airflow simulation units; the jet flow form detection unit and the jet flow height detection unit are respectively used for detecting the jet flow form and the jet flow height of the jet flow formed on the bipolar plate below the cover plate; and the jet flow pressure detection unit is used for detecting the impact acting force of the jet flow formed on the bipolar plate below the jet flow pressure detection unit. By simulating the real working condition of the bipolar plate, the performance of the microporous flow channel under different design parameters can be fed back more truly, and a reliable guarantee is provided for optimization of the design parameters of the microporous flow channel.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen production technology in electrolyzers, specifically relating to a device for testing the performance of microporous flow channels in bipolar plates of electrolyzers. Background Technology

[0002] PEM (Proton Exchange Membrane) water electrolysis for hydrogen production utilizes a polymer electrolyte membrane to decompose water into hydrogen and oxygen, offering advantages such as high efficiency, compact design, and rapid response. PEM bipolar plates are a crucial component of the proton exchange membrane electrolyzer, supporting current transmission and the water electrolysis reaction. They are typically made of titanium alloys or other corrosion-resistant metals, possessing good electrical conductivity and mechanical strength.

[0003] Patent document CN223738158U discloses an electrolyzer bipolar plate with microporous channels and an electrolyzer. This bipolar plate improves hydrogen production efficiency by creating a microporous channel network on its anode side surface and utilizing numerous jet holes distributed on the microporous channel network to spray water towards the membrane electrode unit. The design structure and parameters of the microporous channel network on the bipolar plate directly affect its hydrogen production capacity and processing performance; therefore, reliable testing of the microporous channel performance is necessary during the structural design process. Utility Model Content

[0004] The purpose of this invention is to provide a device for testing the performance of microporous flow channels on bipolar plates in electrolytic cells, so as to achieve reliable testing of the performance of microporous flow channels on bipolar plates.

[0005] This utility model is achieved through the following technical solution:

[0006] An electrolytic cell bipolar plate microporous flow channel performance testing device is used for simulating and testing the performance of bipolar plates in a bipolar plate assembly. The bipolar plate assembly includes multiple bipolar plates stacked in layers. A microporous flow channel network is provided on the anode side of the bipolar plates to form a jet exiting from the jet holes on the anode side. A gas flow network is provided on the cathode side of the bipolar plates for guiding hydrogen gas flow. The device includes:

[0007] The bipolar plate assembly is mounted on the base plate.

[0008] A cover plate is disposed on top of the bipolar plate assembly, with the anode side of the bipolar plates facing the side where the cover plate is located. The cover plate is made of a transparent material.

[0009] An isolation plate is disposed between two adjacent bipolar plates. Both the isolation plate and the cover plate have airflow simulation units on the side facing the bipolar plate below them. These airflow simulation units provide airflow to the anode side of the corresponding bipolar plate.

[0010] The jet morphology detection unit and the jet height detection unit are used to detect the jet morphology and jet height of the jet formed on the bipolar plate located below the cover plate, respectively.

[0011] The jet pressure detection unit is used to detect the impact force of the jet formed on the bipolar plate located below it.

[0012] In some embodiments, the airflow simulation unit includes an airflow groove and a gas channel. The airflow groove corresponds to the active region on the anode side, and one end of the gas channel is connected to the airflow groove, through which airflow can be provided to the airflow groove.

[0013] In some embodiments, the airflow simulation unit includes an airflow corridor located in the middle of the airflow slot and dividing the airflow slot into left and right parts. A comb-tooth flow divider is provided between the airflow corridor and the airflow slot. A plurality of flow dividers are provided at intervals on the comb-tooth flow divider. The gas channel is connected to the airflow corridor, so that gas can enter the airflow corridor through the gas channel and flow into the airflow slots located on both sides of the airflow corridor through the flow dividers.

[0014] In some embodiments, gas channels are provided at both ends of the airflow corridor, and airflow is supplied from both ends of the airflow corridor into the airflow corridor through the gas channels.

[0015] In some embodiments, the jet height detection unit includes a laser displacement sensing array disposed above the cover plate, wherein the laser displacement sensors in the laser displacement sensing array are respectively disposed at positions corresponding to the jet hole to be detected.

[0016] In some embodiments, the jet pressure detection unit includes a pressure-sensitive membrane disposed on an isolation plate, the pressure-sensitive membrane being disposed directly opposite the anode side of a bipolar plate located below it.

[0017] In some embodiments, the jet morphology detection unit includes a camera disposed above the cover plate.

[0018] In some embodiments, a background light source is provided on the outside of the cover plate to provide background light for the shooting of the jet.

[0019] In some embodiments, the cover plate is provided with an inlet channel communicating with the inlet of the bipolar plate and an outlet channel communicating with the outlet of the bipolar plate.

[0020] In some embodiments, a water supply system and an air supply system are also included, the water supply system being used to supply water to the bipolar plate assembly, and the air supply system being used to provide the airflow required for detection within the bipolar plate assembly.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] This invention uses a base plate, cover plate, and isolation plate to simulate the assembly of an electrolytic cell with a bipolar plate assembly. Water and gas are supplied to the bipolar plate assembly to simulate the actual working conditions of the electrolytic cell. By setting airflow simulation units on the cover plate and isolation plate, a detection environment of jet and airflow interaction is formed on the anode side of the bipolar plate to better simulate the influence of oxygen airflow generated on the anode side of the bipolar plate on the jet. Based on this, jet shape detection unit, jet height detection unit, and jet pressure detection unit are used to detect the shape, height, and impact force of the jet under the current working conditions, so that the detection results can better match the real working conditions of the bipolar plate, thereby better evaluating the performance of the microporous flow channel and improving the accuracy and reliability of the performance detection of bipolar plates with microporous flow channels.

[0023] This invention simulates the real working conditions of a bipolar plate, providing a more realistic reflection of the performance of the microporous channel under different design parameters, thus offering a reliable guarantee for optimizing the design parameters of the microporous channel. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the anode side structure of a bipolar plate with microporous flow channels according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram illustrating the state of the detection device in this embodiment of the utility model for detecting the jet morphology.

[0027] Figure 3 This is a cross-sectional view of the detection device in this embodiment of the utility model, which detects the jet height and impact force.

[0028] Figure 4 for Figure 3 A partial schematic diagram of point A in the middle.

[0029] Figure 5 This is a schematic diagram of the airflow simulation unit structure on the cover plate in an embodiment of this utility model.

[0030] Figure 6 This is a schematic diagram of the airflow simulation unit structure on the isolation plate in an embodiment of this utility model.

[0031] in:

[0032] 10. Cover plate; 11. Groove; 12. Water inlet channel; 13. Water outlet channel;

[0033] 20. Base plate;

[0034] 30. Isolation panel;

[0035] 40. Bipolar plate; 41. Inlet; 42. Outlet; 43. Microporous flow channel unit; 44. Detection area;

[0036] 50. Laser displacement sensing array;

[0037] 60. Pressure-sensitive membrane;

[0038] 70. Camera; 71. Background light source;

[0039] 81. Gas passage; 82. Airflow channel; 83. Airflow corridor; 84. Comb-tooth flow divider; 85. Flow divider.

[0040] 90. Sealing components. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0042] like Figure 1 As shown, a bipolar plate with microporous channels is presented. The design parameters of the microporous channels directly affect the interaction between the water flow and the membrane electrode unit, thereby affecting the hydrogen production efficiency. Therefore, in the design process of the microporous channels of the bipolar plate, testing the performance of the microporous channels on the anode side of the bipolar plate can provide effective feedback and verification for the optimization of the bipolar plate design parameters.

[0043] Currently, bipolar plates are typically tested by detecting the state of the fluid within the water flow channel. However, in bipolar plates with microporous channels, hydrogen production is achieved through electrolysis using the interaction between the jet from the jet orifice and the membrane electrode unit. Therefore, it is necessary to be able to detect the jet state in order to evaluate the performance of the bipolar plate.

[0044] On the other hand, a certain amount of oxygen will be generated on the anode side of the bipolar plate. The flow of oxygen gas will have a certain impact on the jet. Therefore, it is necessary to simulate the working conditions on the anode side more realistically during the detection in order to achieve effective detection of the jet state.

[0045] Typically, the uniformity of the jet, the height of the jet, and the pressure of the jet at different locations in the active region on the anode side of a bipolar plate can reflect the performance of the microporous flow channel to a certain extent; for example, the design parameters of the main channel / first-level branch channel / short branch channel / jet orifice, etc.

[0046] Reference Figure 2 and Figure 3 In some embodiments of this utility model, the electrolytic cell bipolar plate microporous flow channel performance testing device includes a base plate 20, a cover plate 10 and an isolation plate 30, with the bipolar plate assembly to be tested disposed between the base plate 20 and the cover plate 10.

[0047] The bipolar plate assembly includes multiple bipolar plates 40 arranged in a stacked configuration. This embodiment uses a bipolar plate assembly with two bipolar plates stacked together as an example for explanation. (Refer to...) Figure 1 The bipolar plate 40 is provided with an inlet 41 and an outlet 42. A microporous channel network is provided on the anode side of the bipolar plate. The microporous channel network includes microporous channels and jet holes communicating with the microporous channels, so that the water flow in the microporous channels can be ejected vertically from the jet holes towards the membrane electrode unit under pressure. The jet holes on the microporous channel network cover the active area on the anode side. During operation, the water flow enters the microporous channel from the inlet and is ejected from the jet holes towards the membrane electrode unit, so that the water flow can fully contact the membrane electrode unit. The water flow on the anode side and in the microporous channels flows out through the outlet.

[0048] The base plate 20 is set at the bottom of the bipolar plate assembly to be tested, and the cover plate 10 is set at the top of the bipolar plate assembly to be tested. The isolation plate 30 is set between adjacent bipolar plates in the bipolar plate assembly. Together they form a structure that can simulate an electrolytic cell, and the anode side of the bipolar plate 40 is set towards the side where the cover plate is located.

[0049] From top to bottom, sealing elements 90 are respectively provided between the cover plate 10 and the bipolar plate 40, between the bipolar plate 40 and the isolation plate 30, and between the bipolar plate 40 and the bottom plate 20, forming sealed spaces between the cover plate, the bipolar plate and the bottom plate to simulate the structure of an electrolytic cell.

[0050] The cover plate 10 is made of a transparent material, such as acrylic sheet or other transparent plastic material.

[0051] In this embodiment, airflow simulation units are provided on both the cover plate 10 and the isolation plate 30 on the side facing the bipolar plate located below them. These airflow simulation units provide airflow to the anode side of the corresponding bipolar plate, thereby simulating the oxygen airflow generated on the anode side and the effect of the anode-side oxygen airflow on the jet state. For example, the airflow simulation unit on the cover plate can provide airflow to the anode side of the bipolar plate located below the cover plate, and the airflow simulation unit on the isolation plate can provide airflow to the anode side of the bipolar plate located below it.

[0052] In some embodiments, refer to Figure 5 and Figure 6 The airflow simulation unit includes an airflow slot 82 and a gas channel 81. The airflow slot 82 corresponds to the active area on the anode side, and one end of the gas channel 81 is connected to the airflow slot 82, providing airflow into the airflow slot. In the assembled state, the airflow slot and the corresponding bipolar plate form a closed cavity structure. Gas flows into the airflow slot through the gas channel, forming an airflow covering the entire active area on the anode side to simulate the oxygen generated on the anode side.

[0053] In some embodiments, such as Figure 5 and Figure 6 As shown, the airflow simulation unit also includes an airflow corridor 83, which is located in the middle of the airflow slot 82 and divides the airflow slot 82 into left and right parts. The airflow corridor 83 and the airflow slot 82 are isolated by a comb-tooth flow divider 84, or in other words, the airflow corridor 83 is formed in the airflow slot 82 by the comb-tooth flow divider 84 installed in the airflow slot. Several flow dividers 85 are arranged at intervals on the comb-tooth flow divider 84, so that the airflow corridor and the airflow slot are connected through the flow dividers. At this time, the gas channel is connected to the airflow corridor, so that the gas can enter the airflow corridor through the gas channel and flow into the airflow slots located on both sides of the airflow corridor through the flow dividers.

[0054] By setting up the airflow corridor, the gas first enters the airflow corridor through the gas channel, and then is evenly distributed into the airflow slots on both sides through the diversion port, ensuring that the airflow can flow evenly into each area of ​​the active zone on the anode side.

[0055] The comb-tooth flow divider or cover / isolation plate can be placed close to the anode side of the bipolar plate, so that the airflow corridor, airflow groove and the anode side of the bipolar plate can form a better closed cavity, ensuring that the airflow can flow evenly into each area of ​​the anode side, so as to achieve a better simulation effect.

[0056] In some embodiments, gas channels 81 are provided at both ends of the airflow corridor 83, and gas is simultaneously introduced into the airflow corridor from both ends through the gas channels on both sides to achieve a better airflow simulation effect.

[0057] A jet height detection unit is installed above the transparent cover plate 10. The jet height detection unit can detect the height of the water jet from the jet hole through the transparent cover plate.

[0058] In some embodiments, the jet height detection unit includes a laser displacement sensor array 50, which includes laser displacement sensors arranged in an array. The laser displacement sensors are respectively disposed at positions corresponding to the jet holes in the area to be detected, and measure the jet height of the corresponding jet holes.

[0059] Laser displacement sensors are based on laser triangulation and measure the height of a jet of water by detecting the reflection position of a laser beam at the top of the jet column; for example, Keyence's LK-G series laser displacement sensors can be used.

[0060] Because the spacing between the jet holes in the micro-channel is small, it is difficult to set corresponding laser displacement sensors at the corresponding positions of all jet holes in the micro-channel to detect the jet of each jet hole. Therefore, in this embodiment, the position of the laser displacement sensor in the laser displacement sensor array is designed. For example, for each micro-channel unit 43, along the main channel direction, the area near the two ends and the middle of the main channel is selected as the detection area 44. In each detection area, along the first-level branch channel direction, the jet holes on the short branch channels at both ends and the middle are selected as the detection hole positions. The position of the laser displacement sensor in the laser displacement sensor array is arranged according to the position of the detection hole position.

[0061] Based on the selected detection area, comparing the differences in jet height between different detection areas can be used to optimize the design parameters of micro-orifice channels (such as the width / height of the main channel, primary branch channels, and short branch channels).

[0062] The jet height of the jet orifice in each test area is measured using a laser displacement sensor array, and the performance of different regions of the micro-orifice channel is analyzed based on the jet height. Simultaneously, the laser displacement sensor array can also detect fluctuations in the jet height to assess the impact of different operating conditions (pressure, temperature, etc.) on the jet height.

[0063] To reduce the influence of the cover plate material on the refraction and reflection of laser light as it passes through the cover plate, the area on the cover plate corresponding to the active area on the anode side is thinned, so that the thickness of this area on the cover plate is less than the thickness of other locations.

[0064] Similarly, anti-reflective coatings can be applied to both sides of the cover plate corresponding to the active region on the anode side, such as using multilayer dielectric films (TiO2 / SiO2). Alternatively, a 45° wedge angle can be machined at the corresponding position on the cover plate to compensate for the effects of light path refraction.

[0065] Corresponding to the thinning process performed on the cover plate, a groove 11 is formed on the cover plate 10 at the position corresponding to the active area on the anode side. The laser displacement sensing array 50 is fitted into the groove 11. Through the cooperation between the groove and the laser displacement sensing array, the laser displacement sensing array is assisted in positioning, ensuring that the laser displacement sensor can correspond to the position of the jet to be detected.

[0066] On the other hand, the jet from the jet orifice is sprayed onto the membrane electrode unit to ensure sufficient contact between the water flow and the membrane electrode unit, thus guaranteeing hydrogen production efficiency. However, excessive impact force can damage the membrane electrode unit, affecting its lifespan and the sealing performance between it and the sealing components. Therefore, detecting the magnitude of the impact force of the jet on the membrane electrode unit is also of great importance for the optimized design of the microporous flow channel parameters.

[0067] In some embodiments, a jet pressure detection unit is provided between adjacent bipolar plates 40 to detect the magnitude of the impact force of water jets ejected from each jet hole on the membrane electrode unit.

[0068] Reference Figure 4 The jet pressure detection unit includes a pressure-sensitive membrane 60 disposed on an isolation plate, which is positioned directly opposite the anode side of the bipolar plate located below it.

[0069] The pressure-sensitive membrane is based on microcapsule color development technology. The microcapsules inside the membrane encapsulate a color developer. When subjected to pressure impact, the microcapsules rupture and release the color developer. The color density of the pressure-sensitive membrane is directly proportional to the pressure. By analyzing the color pattern on the pressure-sensitive membrane, the magnitude and difference of the jet pressure in each region of the jet orifice can be analyzed.

[0070] The pressure-sensitive membrane can be made of Fuji Prescale pressure measuring film or similar products.

[0071] The jet pressure detection unit can also use a MEMS pressure sensor array unit. The MEMS pressure sensor array unit uses a flexible PCB substrate, on which pressure sensing units are distributed. The pressure sensing units correspond to the positions of the jet holes to be detected. The arrangement of the pressure sensing units can adopt the same arrangement method as the laser displacement sensor to realize the measurement of the height and pressure of the jet from the jet holes at the same position.

[0072] Similarly, by comparing the differences in the magnitude of the jet impact force at different locations, the design parameters of the micro-orifice channel (such as the width / height of the main channel, primary branch channels, and short branch channels) can be optimized.

[0073] like Figure 6As shown, based on the airflow groove 82 on the isolation plate, the pressure-sensitive membrane or MEMS pressure sensor array unit can be correspondingly set at the bottom of the airflow groove.

[0074] The depths of the airflow grooves 82 on the cover plate 10 and the isolation plate 30 can be set to have a certain difference. For example, the depth of the airflow groove on the cover plate can be set to be greater than the height of the jet to facilitate the detection of the jet height, while the depth of the airflow groove on the isolation plate can be set to simulate the distance between the actual jet and the membrane electrode unit to detect the magnitude of the impact force of the jet on the membrane electrode unit.

[0075] In some embodiments, the detection device includes a jet pattern detection unit, which uses a camera 70 to capture the pattern of the water jet emerging from the jet hole from above the cover plate, thereby analyzing the jet pattern. (Refer to...) Figure 2 The camera 70 uses a high-speed camera to capture the jet shape after the jet stabilizes. By analyzing the images of the jet shape at different times, the stability of the jet and the verticality of the jet orifice are analyzed.

[0076] A background light source 71 can be installed either outside the cover plate 10 or on the cover plate itself. The background light source 71 illuminates the active area on the anode side of the bipolar plate, providing background light for the water flow ejected from the jet hole. The background light source can use green light with a wavelength of 520nm, which is injected at a small angle from the side of the cover plate to make the jet show a green outline, increase the contrast between the jet and the environment, improve the quality of the jet pattern image, and facilitate the processing and analysis of the jet pattern.

[0077] Both jet height detection and jet shape detection are performed above the cover plate. To avoid interference between the two during detection, jet height detection and jet shape detection are performed separately. For example, after using a camera to capture the jet shape, the laser displacement sensor array is then switched to detect the jet height.

[0078] This invention employs a water supply system to provide circulating water for the testing process. The water supply system can adjust and control the water pressure and flow rate in real time to better simulate the actual working conditions of the bipolar plates in the electrolytic cell. A gas supply system provides the required airflow to the airflow simulation unit. The gas supply system's pipelines are connected to the inlet ends of the gas channels. Quick-connect fittings are installed on the inlet ends of the gas channels on the cover plate to facilitate connection to the gas supply system pipelines.

[0079] The cover plate 10 is provided with an inlet channel 12 that communicates with the inlet 41 of the bipolar plate and an outlet channel 13 that communicates with the outlet 42 of the bipolar plate. Quick connectors are provided on the inlet channel 12 and the outlet channel 13 respectively. The inlet channel and the outlet channel of the cover plate are connected to the pipeline of the water supply system through the quick connectors to provide circulating water for the detection process of the detection device.

[0080] Reference Figure 6 The isolation plate 30 is provided with channels for the water inlet, water outlet and hydrogen outlet of the bipolar plate respectively.

[0081] During the testing operation, water is supplied to the testing device through the water supply system. The water flows through the inlet and enters the microporous channels of each bipolar plate. The water in the microporous channels flows through the jet holes to form a jet. Gas is introduced into the airflow simulation unit on the cover plate / isolation plate through the gas supply system, forming an airflow on the anode side of the bipolar plate.

[0082] A camera is used to capture and detect the jet morphology. Then, a laser displacement sensor array is switched to detect the jet height. Simultaneously, a colored pattern is formed on the pressure-sensitive membrane under the impact of the jet. The colored pattern on the pressure-sensitive membrane is analyzed to detect the magnitude of the jet impact force at the jet orifice.

[0083] Of course, this utility model also includes a control system, which is used to control the jet height detection unit, the jet shape detection unit, the water supply system, and the gas supply system, as well as to collect and analyze laser displacement sensor array data and camera data, and to calculate and determine the status of the detection data.

[0084] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0085] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0086] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0087] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A device for testing the performance of microporous flow channels in bipolar plates of an electrolytic cell, characterized in that, For simulating and testing the performance of bipolar plates in a bipolar plate assembly, the bipolar plate assembly includes multiple bipolar plates arranged in a stacked manner, and a microporous flow channel network is provided on the anode side of the bipolar plates to form a jet ejected from the jet holes on the anode side; including: The bipolar plate assembly is mounted on the base plate. A cover plate is disposed on top of the bipolar plate assembly, with the anode side of the bipolar plates facing the side where the cover plate is located. The cover plate is made of a transparent material. An isolation plate is disposed between two adjacent bipolar plates. Both the isolation plate and the cover plate have airflow simulation units on the side facing the bipolar plate below them. These airflow simulation units provide airflow to the anode side of the corresponding bipolar plate. The jet morphology detection unit and the jet height detection unit are used to detect the jet morphology and jet height of the jet formed on the bipolar plate located below the cover plate, respectively. The jet pressure detection unit is used to detect the impact force of the jet formed on the bipolar plate located below it.

2. The electrolytic cell bipolar plate microporous flow channel performance testing device according to claim 1, characterized in that, The airflow simulation unit includes an airflow tank and a gas channel. The airflow tank corresponds to the active area on the anode side, and one end of the gas channel is connected to the airflow tank, through which airflow can be provided to the airflow tank.

3. The electrolytic cell bipolar plate microporous flow channel performance testing device according to claim 2, characterized in that, The airflow simulation unit includes an airflow corridor located in the middle of the airflow slot and dividing the airflow slot into left and right parts. A comb-tooth flow divider is provided between the airflow corridor and the airflow slot. Several flow dividers are provided at intervals on the comb-tooth flow divider. The gas channel is connected to the airflow corridor, so that gas can enter the airflow corridor through the gas channel and flow into the airflow slots located on both sides of the airflow corridor through the flow dividers.

4. The electrolytic cell bipolar plate microporous flow channel performance testing device according to claim 3, characterized in that, Gas channels are provided at both ends of the airflow corridor, and airflow is supplied from both ends of the airflow corridor into the airflow corridor through the gas channels.

5. The electrolytic cell bipolar plate microporous flow channel performance testing device according to any one of claims 1-4, characterized in that, The jet height detection unit includes a laser displacement sensing array disposed above the cover plate, wherein the laser displacement sensors in the laser displacement sensing array are respectively disposed at positions corresponding to the jet hole to be detected.

6. The electrolytic cell bipolar plate microporous flow channel performance testing device according to any one of claims 1-4, characterized in that, The jet pressure detection unit includes a pressure-sensitive membrane disposed on an isolation plate, which is positioned directly opposite the anode side of the bipolar plate located below it.

7. The electrolytic cell bipolar plate microporous flow channel performance testing device according to any one of claims 1-4, characterized in that, The jet morphology detection unit includes a camera positioned above the cover plate.

8. The electrolytic cell bipolar plate microporous flow channel performance testing device according to claim 7, characterized in that, A background light source is located on the outside of the cover plate to provide background light for the shooting of the jet.

9. The electrolytic cell bipolar plate microporous flow channel performance testing device according to claim 1, characterized in that, The cover plate is provided with an inlet channel that communicates with the inlet of the bipolar plate and an outlet channel that communicates with the outlet of the bipolar plate.

10. The electrolytic cell bipolar plate microporous flow channel performance testing device according to claim 1, characterized in that, It also includes a water supply system and an air supply system, wherein the water supply system is used to supply water to the bipolar plate assembly, and the air supply system is used to provide the airflow required for detection to the airflow simulation unit.

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