Electrolytic cell visualization tooling, electrolytic cell visualization test system and test method thereof

Abstract

The present application discloses an electrolytic cell visualization tooling, an electrolytic cell visualization test system and a test method thereof. The electrolytic cell visualization tooling includes an end plate, a transparent plate, a hollow current collecting plate, a staggered straight-through laminated titanium mesh, a slot core component structure and fasteners. The present application is aimed at the lateral water inlet of a pure PTL type electrolytic cell without a flow channel. By hollowing out the middle area of ​​the end plate of the traditional electrolytic cell tooling to form an observation through hole used as an observation window, a transparent plate is added between the end plate and the current collecting plate and sealed and connected to each other, thereby ensuring the overall sealing, and the process of generating bubbles and discharging bubbles by the electrolysis reaction of water can be realized through the observation through hole. Real-time visual monitoring.

Description

Technical Field

[0001] The present application relates to the technical field of electrolytic cells, and in particular to an electrolytic cell visualization tooling, an electrolytic cell visualization testing system and a testing method thereof. Background Art

[0002] When the PEM electrolyzer is in operation, a large number of bubbles will be generated in the reaction zone. When the bubbles cannot be effectively discharged from the reaction zone of the PTL electrolyzer, the bubbles will cover the active points in the reaction zone, resulting in a decrease in reaction efficiency and an increase in local voltage loss. Therefore, it is necessary to know where bubbles are likely to accumulate in the designed electrolyzer in order to improve the design. Usually, the visualization system of the PEM electrolyzer is designed for the flow channel type electrolyzer. This type of flow channel type electrolyzer usually uses etching technology to etch the flow channel on the collector plate / partition plate. When designing the visualization test tooling for this type of electrolyzer, it is often necessary to design the collector plate as a hollow structure, and then add a perforated transparent plate on the top to achieve the function of sealing and observing the water inlet. The disadvantage of this structure is that if side leakage occurs when water is entering, even if the seal is good and there is no leakage, water will spread all over the observation window, which is not conducive to the observation of experimental phenomena. In addition, since the reaction zone of the channelless pure PTL electrolyzer is laterally inlet, if this structure is directly used in the channelless electrolyzer, a cavity will be formed between the transparent plate and the collecting plate, and the water and gas transport state will change, which is inconsistent with the actual working conditions of the product. Summary of the invention

[0003] The embodiments of the present application provide an electrolytic cell visualization tooling, an electrolytic cell visualization testing system and a testing method thereof, which can solve the technical problem of the lack of visualization tooling for a pure PTL type electrolytic cell without a flow channel to realize the function of sealing and observing water inflow.

[0004] An embodiment of the present application provides an electrolytic cell visualization tooling, which includes an end plate, a transparent plate, a hollow collector plate, a staggered straight-through laminated titanium mesh, a slot core component structure and a fastener; the end plate is a circular ring structure, an observation through hole is provided in the middle of the end plate, the edge of the end plate is sealed and connected to the transparent plate, a protruding structure is provided in the middle of a side of the transparent plate away from the end plate, the protruding structure is arranged corresponding to the observation through hole, the side of the transparent plate away from the end plate is sealed and connected to the hollow collector plate, a hollow structure is provided in the middle of the hollow collector plate, the protruding structure is inlaid and matched with the hollow structure, the staggered straight-through laminated titanium mesh is provided on the side of the hollow collector plate away from the transparent plate, the staggered straight-through laminated titanium mesh is arranged corresponding to the hollow structure, the slot core component structure is sealed and connected to the hollow collector plate, and the fastener passes through the edges of the end plate, the transparent plate, the hollow collector plate and the slot core component structure in sequence to press the end plate and the slot core component structure.

[0005] Furthermore, the edge of the end plate is provided with a plurality of first water and air circular holes arranged at intervals, and the edge of the transparent plate is provided with a plurality of second water and air circular holes arranged at intervals, and the second water and air circular holes are arranged in a one-to-one correspondence with the first water and air circular holes.

[0006] Furthermore, the electrolytic cell visualization tooling also includes a first sealing rubber ring, and a first sealing groove for accommodating the first sealing rubber ring is provided on the side of the transparent plate facing the end plate, the first sealing groove is arranged around the second water outlet and exhaust circular hole, and the first sealing rubber ring is arranged between the end plate and the transparent plate.

[0007] Furthermore, the slot core component structure is provided with a groove for clamping the staggered straight-through stacked titanium mesh, the surface of the staggered straight-through stacked titanium mesh is flush with the surface of the slot core component structure, and the slot core component structure is also provided with a plurality of connecting grooves, which connect the second water drainage and exhaust circular holes with the staggered straight-through stacked titanium mesh.

[0008] Furthermore, the thickness of the protruding structure is equal to the thickness of the hollow current collecting plate.

[0009] Furthermore, the electrolytic cell visualization tooling also includes a second sealing rubber ring, and a second sealing groove for accommodating the second sealing rubber ring is provided on the side of the transparent plate facing the hollow current collecting plate, the second sealing groove is arranged around the second water and exhaust circular hole, and the second sealing rubber ring is arranged between the hollow current collecting plate and the transparent plate.

[0010] Furthermore, the electrolytic cell visualization tooling also includes a third sealing rubber ring, and a third sealing groove for accommodating the third sealing rubber ring is provided on the side of the transparent plate facing the hollow current collecting plate, the third sealing groove is arranged around the protruding structure, and the third sealing rubber ring is arranged between the hollow current collecting plate and the transparent plate.

[0011] The present application also provides an electrolytic cell visualization test system, which includes the electrolytic cell visualization tooling, high-speed camera system, electrochemical test system, water vapor control system and processor mentioned above, wherein the electrochemical test system and the water vapor control system are both connected to the processor, the high-speed camera system includes a high-speed camera and a light source, and the high-speed camera is arranged corresponding to the observation through hole of the electrolytic cell visualization tooling, the electrochemical test system includes an electrochemical test workstation and a pressure recorder, the voltage sensor of the electrochemical test workstation is connected to the positive and negative poles of the electrolytic cell current collecting plate of the electrolytic cell visualization tooling, the pressure sensor is arranged at the anode inlet and anode water outlet of the electrolytic cell visualization tooling, and the water vapor control system is connected to the anode inlet and anode water outlet of the electrolytic cell visualization tooling.

[0012] Furthermore, the water-gas control system includes an oxygen separator, a hydrogen separator, a water pump, a heater, a water storage tank and a heat exchanger; the cathode water outlet of the electrolyzer visualization tooling is connected to the hydrogen separator, the hydrogen separator stores deionized water in the water storage tank after discharging hydrogen, the deionized water in the water storage tank enters the oxygen separator through the heater, the oxygen separator discharges oxygen and refluxes the deionized water to the anode inlet of the electrolyzer visualization tooling through the water pump, the anode water outlet of the electrolyzer visualization tooling is connected to the oxygen separator, and the water storage tank is also connected to the anode inlet of the electrolyzer visualization tooling through the heat exchanger.

[0013] The present application also provides a testing method of the electrolytic cell visual testing system as described above, which comprises the following steps:

[0014] Acquiring voltage and current data collected by an electrochemical testing workstation at both ends of the positive and negative electrodes of the electrolytic cell current collecting plate of the electrolytic cell visualization tooling;

[0015] Obtaining pressure data collected by a pressure sensor at an anode inlet and an anode outlet of the electrolytic cell visualization tooling, and calculating flow resistance;

[0016] Acquire the bubble morphology in the electrolytic cell visualization tooling captured by a high-speed camera system;

[0017] The bubble morphology and flow resistance at different current densities and flow rates were analyzed to obtain the corresponding relationship between electrochemical performance, flow resistance and bubble morphology.

[0018] The electrolytic cell visualization tooling, electrolytic cell visualization testing system and testing method provided in the embodiments of the present application are aimed at lateral water inflow into a pure PTL type electrolytic cell without a flow channel. An observation through hole is formed by hollowing out the middle area of ​​the end plate of the traditional electrolytic cell tooling to serve as an observation window, and a transparent plate is added between the end plate and the current collecting plate and sealed to each other to ensure the overall sealing. The process of generating bubbles and discharging them by the electrolysis reaction of water can be monitored visually in real time through the observation through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0020] Figure 1 A schematic diagram of the structure of the electrolytic cell visualization tooling provided in an embodiment of the present application in a flattened state.

[0021] Figure 2 A cross-sectional view of the electrolytic cell visualization tooling provided in an embodiment of the present application.

[0022] Figure 3 A schematic diagram of the structure of the electrolytic cell visual testing system provided in an embodiment of the present application.

[0023] Figure 4 A test method based on an electrolytic cell visualization test system provided in an embodiment of the present application is a flowchart of the steps of operating a PEM electrolytic cell visualization test system.

[0024] The markings in the figure are as follows:

[0025] End plate 1, observation through hole 11, first water and air discharge circular hole 12, transparent plate 2, protruding structure 21, second water and air discharge circular hole 22, second sealing groove 23, third sealing groove 24, hollow collecting plate 3, hollow structure 31, staggered straight-through stacked titanium mesh 4, groove core component structure 5, groove 51, connecting groove 52, fastener 6, first sealing rubber ring 7, second sealing rubber ring 8, third sealing rubber ring 9, electrolytic cell visualization tooling 10, high-speed camera system 20, high-speed camera 201, light source 202, electrochemical testing system 30, electrochemical testing workstation 301, pressure sensor 302, water and gas control system 40, oxygen separator 401, hydrogen separator 402, water pump 403, heater 404, water storage tank 405, heat exchanger 406, processor 50. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0027] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] like Figure 1 , Figure 2 As shown, the embodiment of the present application provides an electrolytic cell visualization tool 10, which includes an end plate 1, a transparent plate 2, a hollow current collecting plate 3, a staggered straight-through laminated titanium mesh 4, a slot core assembly structure 5 and a fastener 6; the end plate 1 is a circular ring structure, and an observation through hole 11 is provided in the middle of the end plate 1, and the edge of the end plate 1 is sealed with the transparent plate 2, and a protruding structure 21 is provided in the middle of one side of the transparent plate 2 away from the end plate 1, and the protruding structure 21 is arranged corresponding to the observation through hole 11, and the side of the transparent plate 2 away from the end plate 1 is connected to the hollow The hollow collecting plate 3 is sealed and connected, a hollow structure 31 is provided in the middle of the hollow collecting plate 3, the protruding structure 21 is inlaid and matched with the hollow structure 31, the staggered straight-through stacked titanium mesh 4 is arranged on the side of the hollow collecting plate 3 away from the transparent plate 2, the staggered straight-through stacked titanium mesh 4 is arranged corresponding to the hollow structure 31, the slot core component structure 5 is sealed and connected to the hollow collecting plate 3, and the fastener 6 passes through the edges of the end plate 1, the transparent plate 2, the hollow collecting plate 3 and the slot core component structure 5 in sequence to press the end plate 1 and the slot core component structure 5.

[0030] Among them, this embodiment is aimed at the lateral water inlet of the pure PTL type electrolytic cell without flow channel. The middle area of ​​the end plate 1 of the traditional electrolytic cell tooling is hollowed out to form an observation hole 11 used as an observation window, and a transparent plate 2 is added between the end plate 1 and the collecting plate and sealed to each other to ensure the overall sealing. The process of generating bubbles and discharging them by the electrolysis reaction of water can be monitored visually in real time through the observation hole 11.

[0031] The end plate 1 is made of stainless steel, and the hollow current collecting plate 3 is made of TA2. TA2 is an industrial titanium with a single α phase. TA2 in the national standard corresponds to Gr2 in UNS, and the iron content is ≤0.30.

[0032] Furthermore, the edge of the end plate 1 is provided with a plurality of first water and air circular holes 12 arranged at intervals, and the edge of the transparent plate 2 is provided with a plurality of second water and air circular holes 22 arranged at intervals, and the second water and air circular holes 22 are arranged one-to-one with the first water and air circular holes 12.

[0033] Preferably, the first water-venting circular hole 12 and the second water-venting circular hole 22 are each provided with four, and the transparent plate 2 is made of a highly transparent material, such as PMMA (polymethyl methacrylate, organic glass, acrylic), to minimize the refraction loss of light and ensure high visibility, so as to realize the observation of the evolution process of bubble generation, aggregation, and breakage during the electrolysis process. The transparent plate 2 can ensure a clear observation effect and precision at the same time.

[0034] Preferably, the fasteners 6 are eight bolts, and eight bolt holes are provided at the edges of the end plate 1, the transparent plate 2, the hollow current collecting plate 3 and the slot core assembly structure 5. The end plate 1 can prevent the transparent plate 2 from being directly fixed with the bolts, so that the stress distribution on the transparent plate 2 is more uniform, the stress concentration is reduced, and the service life is increased; in addition, another benefit is that the thickness of the transparent plate 2 is reduced while the strength of the transparent plate 2 is ensured. The thinner the transparent plate 2 is, the clearer the overall observation effect is.

[0035] Furthermore, the electrolytic cell visualization tooling 10 also includes a first sealing rubber ring 7, and a first sealing groove for accommodating the first sealing rubber ring 7 is provided on the side of the transparent plate 2 facing the end plate 1, and the first sealing groove is arranged around the second water outlet and exhaust circular hole 22, and the first sealing rubber ring 7 is arranged between the end plate 1 and the transparent plate 2.

[0036] Among them, the sealing rubber ring is made of silicone, and the sealing groove of the transparent plate 2 effectively ensures basic sealing. Its position is arranged in the vertical coverage area of ​​the end plate 1, so that more of the sealing gasket is pressed and distributed on the silicone material, thereby improving the upper limit of sealing.

[0037] Furthermore, the slot core component structure 5 is provided with a groove 51 for clamping the staggered straight-through stacked titanium mesh 4, and the surface of the staggered straight-through stacked titanium mesh 4 is flush with the surface of the slot core component structure 5. The slot core component structure 5 is also provided with a plurality of connecting grooves 52, and the connecting grooves 52 connect the second water discharge and exhaust circular holes 22 with the staggered straight-through stacked titanium mesh 4.

[0038] Furthermore, the thickness of the protruding structure 21 is equal to the thickness of the hollow current collecting plate 3. The protruding structure 21 is inlaid with the hollow structure 31 to ensure conductivity while preventing gas and liquid from leaking inside the field of view and affecting the observation effect, greatly reducing the possibility of lateral leakage in the observation area and the possibility of adversely affecting the observation effect. At the same time, it is different from the visual design of the flow channel type electrolytic cell, forming a completely closed structure to simulate the real working condition, avoiding the cavity between the current collecting plate and the transparent plate 2, and simulating the real working condition of the non-flow channel type electrolytic cell.

[0039] Furthermore, the electrolytic cell visualization tooling 10 also includes a second sealing rubber ring 8, and a second sealing groove 23 for accommodating the second sealing rubber ring 8 is provided on the side of the transparent plate 2 facing the hollow collecting plate 3, and the second sealing groove 23 is arranged around the second water outlet and exhaust circular hole 22, and the second sealing rubber ring 8 is arranged between the hollow collecting plate 3 and the transparent plate 2.

[0040] Furthermore, the electrolytic cell visualization tooling 10 further includes a third sealing rubber ring 9, and a third sealing groove 24 for accommodating the third sealing rubber ring 9 is provided on one side of the transparent plate 2 facing the hollow current collecting plate 3, and the third sealing groove 24 is arranged around the protruding structure 21, and the third sealing rubber ring 9 is arranged between the hollow current collecting plate 3 and the transparent plate 2. The third sealing groove 24 is located in the edge area outside the observation through hole 11 of the end plate 1 to ensure the sealing effect of the electrolytic cell.

[0041] like Figure 3 As shown, the present application also provides an electrolytic cell visualization test system, which includes the electrolytic cell visualization tooling 10, the high-speed camera system 20, the electrochemical test system 30, the water vapor control system 40 and the processor 50 mentioned above, wherein the electrochemical test system 30 and the water vapor control system 40 are both connected to the processor 50, the high-speed camera system 20 includes a high-speed camera 201 and a light source 202, and the high-speed camera 201 is arranged corresponding to the observation through hole 11 of the electrolytic cell visualization tooling 10, the electrochemical test system 30 includes an electrochemical test workstation 301 and a pressure sensor 302, the voltage sensor of the electrochemical test workstation 301 is connected to the positive and negative ends of the electrolytic cell current collecting plate of the electrolytic cell visualization tooling 10, the pressure sensor 302 is arranged at the anode inlet and the anode water outlet of the electrolytic cell visualization tooling 10, and the water vapor control system 40 is connected to the anode inlet and the anode water outlet of the electrolytic cell visualization tooling 10.

[0042] Furthermore, the water gas control system 40 includes an oxygen separator 401, a hydrogen separator 402, a water pump 403, a heater 404, a water storage tank 405 and a heat exchanger 406; the cathode water outlet of the electrolyzer visualization tooling 10 is connected to the hydrogen separator 402, and the hydrogen separator 402 stores deionized water in the water storage tank 405 after discharging hydrogen, and the deionized water in the water storage tank 405 enters the oxygen separator 401 through the heater 404, and the oxygen separator 401 discharges oxygen and refluxes the deionized water to the anode inlet of the electrolyzer visualization tooling 10 through the water pump 403, and the anode water outlet of the electrolyzer visualization tooling 10 is connected to the oxygen separator 401, and the water storage tank 405 is also connected to the anode inlet of the electrolyzer visualization tooling 10 through the heat exchanger 406.

[0043] The present application also provides a testing method of the electrolytic cell visual testing system as described above, which comprises the following steps:

[0044] Obtaining voltage and current data at both ends of the positive and negative electrodes of the electrolytic cell current collecting plate of the electrolytic cell visualization tool 10 collected by the electrochemical testing workstation 301;

[0045] Obtaining pressure data collected by the pressure sensor 302 at the anode inlet and the anode outlet of the electrolytic cell visualization tooling 10, and calculating the flow resistance;

[0046] Acquire the bubble morphology in the electrolytic cell visualization tool 10 captured by the high-speed camera system 20;

[0047] The bubble morphology and flow resistance at different current densities and flow rates were analyzed to obtain the corresponding relationship between electrochemical performance, flow resistance and bubble morphology.

[0048] like Figure 4 As shown, Figure 4 The test method based on the electrolyzer visual test system implements the operation steps of the PEM electrolyzer visual test system:

[0049] Assemble the electrolytic cell visualization tooling 10, build the high-speed camera system 20, and the water and gas control system 40;

[0050] according to Figure 3 The schematic diagram shown is connected to the electrochemical test workstation 301, and the inlet and outlet are connected to the water pipe of the water and gas control system 40;

[0051] Turn on the power of the equipment, set the operating conditions on the processor 50, start the test system and the electrolytic cell, and collect data, obtain the voltage signal, the inlet and outlet pressure data, and make a bubble evolution video.

[0052] The embodiment of the present application can obtain polarization curves characterizing the performance of the electrolyzer, the flow resistance of the PEM visualized electrolyzer, and the flow state of bubbles. The system can analyze the morphology and flow resistance of bubbles at different current densities, as well as the morphology and resistance of bubbles at different flow rates, to study the relevant mechanisms of bubble flow and electrolytic performance in the electrolyzer. Further, by replacing different tank core structures, the advantages and disadvantages of exhaust efficiency can be further evaluated.

[0053] The electrolytic cell visualization tooling, electrolytic cell visualization testing system and testing method provided in the embodiments of the present application are aimed at lateral water inflow into a pure PTL type electrolytic cell without a flow channel. An observation through hole is formed by hollowing out the middle area of ​​the end plate of the traditional electrolytic cell tooling to serve as an observation window, and a transparent plate is added between the end plate and the current collecting plate and sealed to each other to ensure the overall sealing. The process of generating bubbles and discharging them by the electrolysis reaction of water can be monitored visually in real time through the observation through hole.

[0054] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0055] The above is a detailed introduction to an electrolytic cell visualization tooling provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electrolytic cell visualization tooling, characterized in that: The electrolytic cell visualization tooling includes an end plate, a transparent plate, a hollow collecting plate, an interlaced straight-through laminated titanium mesh, a slot core component structure and a fastener; the end plate is a circular ring structure, an observation through hole is provided in the middle of the end plate, the edge of the end plate is sealed and connected to the transparent plate, a protruding structure is provided in the middle of a side of the transparent plate away from the end plate, the protruding structure is arranged corresponding to the observation through hole, the side of the transparent plate away from the end plate is sealed and connected to the hollow collecting plate, a hollow structure is provided in the middle of the hollow collecting plate, the protruding structure is inlaid and matched with the hollow structure, the interlaced straight-through laminated titanium mesh is arranged on the side of the hollow collecting plate away from the transparent plate, the interlaced straight-through laminated titanium mesh is arranged corresponding to the hollow structure, the slot core component structure is sealed and connected to the hollow collecting plate, and the fastener passes through the edges of the end plate, the transparent plate, the hollow collecting plate and the slot core component structure in sequence to press the end plate and the slot core component structure.

2. The electrolytic cell visualization tooling according to claim 1, characterized in that: The edge of the end plate is provided with a plurality of first water and air circular holes arranged at intervals, and the edge of the transparent plate is provided with a plurality of second water and air circular holes arranged at intervals, and the second water and air circular holes are arranged in a one-to-one correspondence with the first water and air circular holes.

3. The electrolytic cell visualization tooling according to claim 2, characterized in that: The electrolytic cell visualization tooling also includes a first sealing rubber ring. A first sealing groove for accommodating the first sealing rubber ring is provided on the side of the transparent plate facing the end plate. The first sealing groove is arranged around the second water and exhaust circular hole. The first sealing rubber ring is arranged between the end plate and the transparent plate.

4. The electrolytic cell visualization tooling according to claim 2, characterized in that: The slot core component structure is provided with a groove for clamping the staggered straight-through stacked titanium mesh, the surface of the staggered straight-through stacked titanium mesh is flush with the surface of the slot core component structure, and the slot core component structure is also provided with a plurality of connecting grooves, which connect the second water discharge and exhaust circular holes with the staggered straight-through stacked titanium mesh.

5. The electrolytic cell visualization tooling according to claim 1, characterized in that: The thickness of the protruding structure is equal to the thickness of the hollow current collecting plate.

6. The electrolytic cell visualization tooling according to claim 2, characterized in that: The electrolytic cell visualization tooling also includes a second sealing rubber ring. A second sealing groove for accommodating the second sealing rubber ring is provided on the side of the transparent plate facing the hollow current collecting plate. The second sealing groove is arranged around the second water and exhaust circular hole. The second sealing rubber ring is arranged between the hollow current collecting plate and the transparent plate.

7. The electrolytic cell visualization tooling according to claim 1, characterized in that: The electrolytic cell visualization tooling also includes a third sealing rubber ring. A third sealing groove for accommodating the third sealing rubber ring is provided on the side of the transparent plate facing the hollow current collecting plate. The third sealing groove is arranged around the protruding structure. The third sealing rubber ring is arranged between the hollow current collecting plate and the transparent plate.

8. An electrolytic cell visual testing system, characterized in that: The invention comprises the electrolytic cell visualization tooling according to any one of claims 1 to 7, a high-speed camera system, an electrochemical test system, a water vapor control system and a processor, wherein the electrochemical test system and the water vapor control system are both connected to the processor, the high-speed camera system comprises a high-speed camera and a light source, the high-speed camera is arranged corresponding to the observation through hole of the electrolytic cell visualization tooling, the electrochemical test system comprises an electrochemical test workstation and a pressure sensor, the voltage sensor of the electrochemical test workstation is connected to the positive and negative ends of the electrolytic cell current collecting plate of the electrolytic cell visualization tooling, the pressure sensor is arranged at the anode inlet and the anode water outlet of the electrolytic cell visualization tooling, and the water vapor control system is connected to the anode inlet and the anode water outlet of the electrolytic cell visualization tooling.

9. The electrolytic cell visual testing system according to claim 8, characterized in that: The water-gas control system comprises an oxygen separator, a hydrogen separator, a water pump, a heater, a water storage tank and a heat exchanger; the cathode water outlet of the electrolyzer visualization tooling is connected to the hydrogen separator, the hydrogen separator stores deionized water in the water storage tank after exhausting hydrogen, the deionized water in the water storage tank enters the oxygen separator through the heater, the oxygen separator exhausts oxygen and refluxes the deionized water to the anode inlet of the electrolyzer visualization tooling through the water pump, the anode water outlet of the electrolyzer visualization tooling is connected to the oxygen separator, and the water storage tank is also connected to the anode inlet of the electrolyzer visualization tooling through the heat exchanger.

10. A testing method for the electrolytic cell visual testing system according to claim 8 or 9, characterized in that: include: Acquiring voltage and current data collected by an electrochemical testing workstation at both ends of the positive and negative electrodes of the electrolytic cell current collecting plate of the electrolytic cell visualization tooling; Obtaining pressure data collected by a pressure sensor at an anode inlet and an anode outlet of the electrolytic cell visualization tooling, and calculating flow resistance; Acquire the bubble morphology in the electrolytic cell visualization tooling captured by a high-speed camera system; The bubble morphology and flow resistance at different current densities and flow rates were analyzed to obtain the corresponding relationship between electrochemical performance, flow resistance and bubble morphology.

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