Electrolytic bath, water electrolysis hydrogen production system and electrolytic bath in-situ detection device
By integrating a reference electrode structure and sealing design into the electrolytic cell, the problems of inconvenience and stability in electrolytic cell testing are solved, achieving high yield and low cost electrolytic cell production, and ensuring the accuracy of test results and the stability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU YIWEI HYDROGEN ENERGY CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-10
AI Technical Summary
In the existing technology, the detection methods for electrolytic cells are inconvenient, especially the three-electrode testing system is unstable, which affects stable operation, and the diaphragm protrusion during the production process leads to additional processing steps and increased costs.
A reference electrode structure is integrated into the electrolytic cell to form a stable three-electrode testing system. The connection stability is ensured by the design of the sealing component and sealing layer, which avoids the diaphragm from protruding and simplifies the production process.
It improves the yield rate and system stability of electrolytic cells, reduces production costs, provides accurate test results, avoids damage to products, and supports long-term stable operation.
Smart Images
Figure CN224105952U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of detection of hydrogen production by water electrolysis, and particularly relates to an electrolytic cell, a water electrolysis hydrogen production system and an electrolytic cell in-situ detection device. BACKGROUND
[0002] The water electrolysis hydrogen production technology is suitable for coupling renewable green hydrogen energy production such as wind power and photovoltaic, is also suitable for power grid energy storage and peak shaving, and is used for providing clean fuel for industry and life, and has a wide application prospect. In the water electrolysis hydrogen production system, the electrolytic cell is a core reaction unit of the water electrolysis hydrogen production system, and the performance of the electrolytic cell directly determines the system efficiency, cost and reliability.
[0003] In the research and production process, the electrolytic cell needs to be detected. A conventional method is to connect two electrodes of the cathode and the anode to an electrochemical workstation for double electrode testing. The double electrode testing needs to change a parameter of a membrane electrode and compare the changes before and after to reflect the problem of the parameter. The change of one parameter often easily causes the coordinated change of other parameters, thereby causing the attribution analysis of the test result to be interfered. Another testing method is to construct a three-electrode testing system. In the related technology, the diaphragm is extended and stretched out to the outside of the electrolytic cell, so that the diaphragm can be connected with an external reference electrode, thereby constructing a testing loop with three electrodes and forming a three-electrode testing system. This method can realize the purpose of in-situ detection of the electrolytic cell and avoid the problem that the change of the parameter in the double electrode testing causes the attribution analysis to be unable to be performed. However, the structure under this method is unstable and cannot be stably operated for a long time, which is not conducive to the failure cause analysis of the stable operation. Therefore, the detection of the electrolytic cell still has many inconveniences. CONTENT OF THE UTILITY MODEL
[0004] Embodiments of the present application provide an electrolytic cell, a water electrolysis hydrogen production system and an electrolytic cell in-situ detection device to solve the technical problem that the electrolytic cell is inconvenient to detect.
[0005] In a first aspect, embodiments of the present application provide an electrolytic cell, which comprises:
[0006] Two flow field plate assemblies are oppositely arranged and form an electrochemical cavity;
[0007] A diaphragm is arranged between the two flow field plate assemblies and separates the electrochemical cavity;
[0008] A reference electrode is arranged on at least one side of the diaphragm, the reference electrode comprises a working end and a connecting end, the working end is inserted into the electrochemical cavity and connected with the diaphragm, and the connecting end is stretched out of the electrochemical cavity.
[0009] In an embodiment of the present application, the diaphragm comprises an active part and a connecting part, a catalyst layer and a gas diffusion layer are arranged on two sides of the active part respectively, the working end is connected with the connecting part, and the working end is spaced apart from the active part.
[0010] In an embodiment of the present application, the connecting portion surrounds the active portion, and the two flow field plate assemblies clamp the connecting portion.
[0011] In an embodiment of the present application, the electrolytic cell further comprises:
[0012] An electrolyte fills the electrochemical cavity, and the working end is connected to the connecting portion or connected to the connecting portion through the electrolyte.
[0013] In an embodiment of the present application, the flow field plate assembly comprises a plate body and a sealing member, the electrochemical cavity is formed between the two plate bodies, and the sealing member is arranged along the edge of the plate body to seal the electrochemical cavity.
[0014] In an embodiment of the present application, the reference electrode is arranged between the diaphragm and the sealing member.
[0015] In an embodiment of the present application, one side of the sealing member facing the diaphragm is provided with a groove to accommodate the reference electrode.
[0016] In an embodiment of the present application, the sealing member comprises a first sealing layer and a second sealing layer, the first sealing layer and the second sealing layer are arranged in a stack between the plate body and the diaphragm, the first sealing layer is arranged closer to the plate body relative to the second sealing layer, and the elasticity of the second sealing layer is greater than that of the first sealing layer.
[0017] In a second aspect, embodiments of the present application provide a water electrolysis hydrogen production system comprising the electrolytic cell of any one of the first aspect.
[0018] In a third aspect, embodiments of the present application provide an in-situ detection device for an electrolytic cell, comprising the electrolytic cell of any one of the first aspect.
[0019] In an embodiment of the present application, the detection device further comprises an electrochemical workstation, the electrochemical workstation is provided with a cathode terminal, an anode terminal and a reference electrode terminal, and the cathode, the anode and the reference electrode of the electrolytic cell are respectively connected to the cathode terminal, the anode terminal and the reference electrode terminal.
[0020] The beneficial effects of embodiments of the present application are as follows:
[0021] The electrolytic cell provided by the embodiments of the present application sets the reference electrode structure in the electrolytic cell and integrates the reference electrode, which is convenient for connecting the electrochemical workstation to build a three-electrode test system and does not affect the conventional two-electrode test. In addition, the reference electrode connection structure is stable, which avoids the problem that the diaphragm extending out of the electrochemical cavity to connect the reference electrode leads to instability of the three-electrode test system, avoids the interference of unstable connection structure on stable operation, and further avoids the damage to the product caused by the processing step after the test, thereby improving the product control.
[0022] The water electrolysis hydrogen production system provided by the embodiment has a high yield and good performance, and the water electrolysis hydrogen production system is more stable in operation.
[0023] The electrolytic cell in-situ detection device has a high yield and good performance, and can be used to construct a two-electrode test system and a three-electrode test system, and the three-electrode test system can be used for long-time operation, and the detection result is accurate and will not interfere with the analysis of the failure reason of stable operation. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0025] Figure 1 is a front view of an electrolytic cell provided by an embodiment of the present application;
[0026] Figure 2 is a side view of an electrolytic cell provided by an embodiment of the present application;
[0027] Figure 3 is a cross-sectional view of an electrolytic cell provided by an embodiment of the present application;
[0028] Figure 4 is a front view of a diaphragm provided by an embodiment of the present application;
[0029] Figure 5 is a front view of a flow field plate assembly provided by an embodiment of the present application;
[0030] Figure 6 is a cross-sectional view of a flow field plate assembly provided by an embodiment of the present application;
[0031] Figure 7 is a structure schematic view of an electrolytic cell detection device provided by an embodiment of the present application.
[0032] BRIEF DESCRIPTION OF DRAWINGS
[0033] 1000-electrolytic cell;
[0034] 1-flow field plate assembly; 11-plate body; 12-seal; 121-first sealing layer; 122-second sealing layer; 123-groove;
[0035] 2-diaphragm; 21-active part; 211-catalyst layer; 212-gas diffusion layer; 22-connection part;
[0036] 3 - reference electrode; 31 - working end; 32 - connecting end;
[0037] 4 - electrochemical cavity; 41 - cathode cavity; 42 - anode cavity;
[0038] 2000 - electrochemical working station; 2001 - cathode terminal; 2002 - anode terminal; 2003 - reference electrode terminal. DETAILED DESCRIPTION
[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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 the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.
[0040] In a water electrolysis hydrogen production system, an electrolytic cell is a core reaction unit of the water electrolysis hydrogen production system, and the performance of the electrolytic cell directly determines the efficiency, cost and reliability of the system. In the related art, to test the performance of the electrolytic cell and accurately identify the cathode response and anode response in the operation process of the electrolytic cell, a common method is to change a parameter of a membrane electrode and compare the changes before and after to reflect the problem of the parameter. However, the membrane electrode and the electrolytic cell are a multi-factor coupled body, and changing a parameter often causes other parameters to change coordinately. For example, when the thickness of the cathode gas diffusion layer is changed, it may cause the internal mechanical compression force to change, thereby affecting the performance of the cathode and the anode. However, in the traditional electrode test, these parameters that are affected and change coordinately are often hidden. Therefore, it is very difficult to attribute the transient performance and durability changes to a certain or certain electrode process.
[0041] To solve the problem of the dual electrode test system, in some technical solutions, the diaphragm is extended and stretched out to the outside of the electrolytic cell during production and processing, so as to connect the stretched-out part of the diaphragm with the reference electrode of the electrochemical working station, connect the cathode of the electrolytic cell with the cathode terminal of the electrochemical working station, and connect the anode of the electrolytic cell with the anode terminal of the electrochemical working station, so as to construct a three-electrode test system and achieve the purpose of in-situ detection of the electrolytic cell. It is found in practice that the structure in this way is unstable and cannot be stably operated for a long time, which is not conducive to the failure reason analysis of stable operation. In addition, the stretched-out part of the diaphragm needs to be treated before the product is shipped, which leads to an increase in production and processing steps and cost, and the treatment process may also cause damage or adverse effects to the products that have passed the test.
[0042] In view of this, the embodiment of the present application provides a technical scheme for solving the problem that the electrolytic cell is inconvenient to detect, improving the stability of the detection system, simplifying the production steps, reducing the production cost, and avoiding adverse effects on the product.
[0043] The first aspect, as shown in Figure 1 , Figure 2 and Figure 3 , the embodiment of the present application provides an electrolytic cell 1000, which comprises two flow field plate assemblies 1, a diaphragm 2 and a reference electrode 3.
[0044] The two flow field plate assemblies 1 are oppositely arranged and form an electrochemical cavity 4, and the diaphragm 2 is arranged between the two flow field plate assemblies 1 and separates the electrochemical cavity 4. It can be understood that the diaphragm 2 separates the electrochemical cavity 4 into a cathode cavity 41 and an anode cavity 42. At least one side of the diaphragm 2 is provided with the reference electrode 3, and the reference electrode 3 comprises a working end 31 and a connecting end 32, the working end 31 extends into the electrochemical cavity 4 and is connected with the diaphragm 2, and the connecting end 32 extends out of the electrochemical cavity 4.
[0045] It should be noted that "at least one side of the diaphragm 2 is provided with the reference electrode 3" means that any side of the diaphragm 2 is provided with the reference electrode 3, or both sides of the diaphragm 2 are provided with the reference electrode 3. Alternatively, the reference electrode 3 comprises a plurality of reference electrodes 3, and the plurality of reference electrodes 3 are arranged on the same side of the diaphragm 2, or the plurality of reference electrodes 3 are arranged on the two sides of the diaphragm 2. In addition, the connection between the working end 31 and the diaphragm 2 is an electrical connection, which can be achieved by physical connection, bonding, surface contact or indirect connection between other objects.
[0046] Exemplarily, as shown in Figure 3 , one flow field plate assembly 1, the diaphragm 2 and the other flow field plate assembly 1 are sequentially stacked, the two flow field plate assemblies 1 enclose to form an electrochemical cavity 4, and the diaphragm 2 separates the electrochemical cavity 4 into left and right two chambers, one of which is a cathode cavity 41 and the other is an anode cavity 42. At least one of the cathode cavity 41 and the anode cavity 42 is provided with the reference electrode 3, the reference electrode 3 has a working end 31 at one end inside the electrochemical cavity 4 and a connecting end 32 extending out of the electrochemical cavity 4, the working end 31 is used to connect the diaphragm 2, and the connecting end 32 is used to connect the reference electrode connecting post 2003 of the electrochemical workstation 2000.
[0047] The technical scheme provided by the embodiment of the application is characterized in that the reference electrode 3 structure is arranged in the electrolytic cell 1000, the reference electrode 3 is integrated, the three-electrode test system is constructed by connecting the reference electrode 3 and the electrochemical workstation 2000, the conventional two-electrode test is not affected, the connection structure of the reference electrode 3 is stable, the problem that the diaphragm 2 extends out of the electrochemical cavity 4 to connect the reference electrode 3 and causes the three-electrode test system to be unstable is avoided, the connection structure is not unstable, and the stable operation is not interfered, in addition, the diaphragm 2 extending out after the test does not need to be processed, the production steps are simplified, the production cost is reduced, the product is not damaged by the processing steps after the test, and the product control is improved.
[0048] It should be noted that, optionally, the electrolytic cell 1000 provided by the embodiment of the application can be a proton exchange membrane electrolytic cell, and the diaphragm 2 can be a proton exchange membrane, which is used to block the electrolyte and gas in the cathode cavity 41 and the anode cavity 42. Alternatively, optionally, the electrolytic cell 1000 provided by the embodiment of the application can be an alkaline electrolytic cell, and the diaphragm 2 can be a porous diaphragm 2, which is used to prevent the gas in the cathode cavity 41 and the gas in the anode cavity 42 from mixing. Alternatively, optionally, the electrolytic cell 1000 provided by the embodiment of the application can be a cation exchange membrane electrolytic cell, and the diaphragm 2 can be a cation exchange membrane, which is used to block the cathode cavity 41 and the anode cavity 42 and conduct hydroxyl ions. The type of the electrolytic cell 1000 is not limited by the application, and the electrolytic cell 1000 is taken as a proton exchange membrane electrolytic cell in the following embodiments.
[0049] In some embodiments, as shown in Figure 3 The diaphragm 2 includes an active part 21 and a connecting part 22, a catalyst layer 211 and a gas diffusion layer 212 are arranged on both sides of the active part 21, the working end 31 is connected with the connecting part 22, and the working end 31 is spaced from the active part 21. For example, the catalyst layer 211 is coated on both side surfaces of the active part 21, and the gas diffusion layer 212 is arranged on the surface of the catalyst layer 211. By arranging the diaphragm 2 into two parts of the active part 21 and the connecting part 22, a cathode reaction zone and an anode reaction zone are formed on both sides of the active part 21, and a non-reaction zone is formed in the connecting part 22, which facilitates the connection of the working end 31 of the reference electrode 3 with the diaphragm 2, avoids the connection of the reference electrode 3 with the cathode or the anode, and ensures the stable operation of the three-electrode test system.
[0050] In some embodiments, as shown in Figure 4 The connecting part 22 surrounds the active part 21, and the two flow field plate assemblies 1 clamp the connecting part 22. By arranging the connecting part 22 on the outer periphery of the active part 21, the diaphragm 2 is facilitated to be connected with the two flow field plate assemblies 1, and the active part 21 is ensured to be located in the electrochemical cavity 4, thereby improving the operation stability of the electrolytic cell 1000.
[0051] In some embodiments, please refer toFigure 3 As shown in the figure, the electrolytic cell 1000 further comprises an electrolyte, which fills the electrochemical cavity 4, and the working end 31 of the reference electrode 3 is connected with the diaphragm 2 or connected with the diaphragm 2 through the electrolyte. By setting the electrolyte to fill the electrochemical cavity 4, the working end 31 of the reference electrode 3 can be directly connected with the connecting part 22 of the diaphragm 2 to achieve the connection, or indirectly connected with the diaphragm 2 through the electrolyte, thereby avoiding poor connection between the reference electrode 3 and the diaphragm 2 and further improving the stability of the test system.
[0052] In some embodiments, in combination with Figure 3 , Figure 5 and Figure 6 As shown in the figure, the flow field plate assembly 1 comprises a plate body 11 and a sealing member 12, and the electrochemical cavity 4 is formed between the two plate bodies 11, and the sealing member 12 is arranged along the edge of the plate body 11 to seal the electrochemical cavity 4. By arranging the sealing member 12 on the edge of the plate body 11, when the two plate bodies 11 are relatively pressed and fixedly connected, the sealing member 12 is deformed under pressure and forms a sealing area on the edge of the plate body 11, thereby improving the sealing performance of the electrolytic cell 1000 and further improving the operation stability. Optionally, the width of the sealing member 12 is smaller than the width of the connecting part 22 of the diaphragm 2, so that the connecting part 22 is at least partially exposed in the electrochemical cavity 4, to facilitate the connection of the reference electrode 3.
[0053] In some embodiments, in combination with Figure 3 As shown in the figure, the reference electrode 3 is arranged between the diaphragm 2 and the sealing member 12. By arranging the reference electrode 3 between the diaphragm 2 and the sealing member 12, the sealing member 12 is deformed under pressure and accommodates the reference electrode 3, thereby avoiding the formation of a gap near the outer peripheral surface of the reference electrode 3 and improving the sealing performance of the electrolytic cell 1000.
[0054] In some embodiments, in combination with Figure 5 and Figure 6 As shown in the figure, one side of the sealing member 12 facing the diaphragm 2 is provided with a groove 123 to accommodate the reference electrode 3. By arranging the groove 123, the reference electrode 3 can be positioned during processing, thereby avoiding the contact between the reference electrode 3 and the active part 21 of the diaphragm 2 and the plate body 11 of the flow field plate, and ensuring that the reference electrode 3 is attached to the connecting part 22 of the diaphragm 2, thereby avoiding poor connection between the reference electrode 3 and the diaphragm 2 and further improving the stability of the test system. Optionally, the reference electrode 3 is in interference fit with the groove 123, to ensure that the outer peripheral surface of the reference electrode 3 is attached to the diaphragm 2 and to avoid the formation of a gap near the outer peripheral surface of the reference electrode 3, thereby improving the sealing performance of the electrolytic cell 1000.
[0055] In other embodiments, the sealing member 12 is provided with a through hole (not shown in the figure) for the reference electrode 3 to pass through, and the reference electrode 3 is in interference fit with the through hole, to avoid the formation of a gap near the outer peripheral surface of the reference electrode 3 and improve the sealing performance of the electrolytic cell 1000.
[0056] In some embodiments, the combination Figure 3 and Figure 6 As shown in the figure, the sealing member 12 includes a first sealing layer 121 and a second sealing layer 122, which are arranged in layers between the plate body 11 and the diaphragm 2, the first sealing layer 121 is arranged closer to the plate body 11 relative to the second sealing layer 122, and the elasticity of the second sealing layer 122 is greater than that of the first sealing layer 121. For example, the first sealing layer 121 is made of a material with high mechanical strength, good insulation, strong chemical inertness, high temperature resistance, and acid and alkali corrosion resistance, to prevent the reference from contacting the flow field plate due to gasket damage, for example, the first sealing layer 121 includes a gasket made of at least one of polytetrafluoroethylene and its modified material, fluororubber, and polyphenylene sulfide; for example, the second sealing layer 122 is made of a material with higher elasticity, for example, the second sealing layer 122 includes a gasket made of silicone, rubber, or the like. By arranging the first sealing layer 121 with high mechanical strength and the second sealing layer 122 with high elasticity, the first sealing layer 121 supports the second sealing layer 122, avoiding the problem of poor sealing caused by distortion of the second sealing layer 122, thereby improving the sealing performance.
[0057] In a second aspect, the embodiments of the present application provide a water electrolysis hydrogen production system, which includes the electrolytic cell 1000 provided by any of the embodiments of the first aspect. The water electrolysis hydrogen production system of the present application has a higher yield and better performance of the electrolytic cell 1000, and the operation of the water electrolysis hydrogen production system is more stable.
[0058] In a third aspect, the embodiments of the present application provide an electrolytic cell in-situ detection device, as shown in the figure Figure 7 The electrolytic cell in-situ detection device includes the electrolytic cell 1000 provided by any of the embodiments of the first aspect. The electrolytic cell in-situ detection device of the present application has the electrolytic cell 1000 provided by any of the embodiments of the first aspect, which can facilitate the construction of a two-electrode test system and a three-electrode test system, the test forms are various, the three-electrode test system supports long-time operation, the detection result is accurate, and does not interfere with the analysis of the failure reason of stable operation.
[0059] As shown in the figure Figure 7 The electrolytic cell 1000 detection device further includes an electrochemical workstation 2000, which is provided with a cathode terminal post 2001, an anode terminal post 2002, and a reference electrode terminal post 2003, and the cathode, anode, and reference electrode 3 of the electrolytic cell 1000 are respectively connected to the cathode terminal post 2001, anode terminal post 2002, and reference electrode terminal post 2003.
[0060] Optionally, the reference electrode 3 comprises a hydrogen electrode (NHE), a reversible hydrogen electrode (RHE), a standard hydrogen electrode (SHE), or at least one of Hg / HgO, Hg / Hg2Cl2, Ag / AgCl, Hg / Hg2SO4, Cu / CuSO4, Pt, Pd.
[0061] Optionally, the plate body 11 of each of the two flow field plate assemblies 1 of the electrolytic cell 1000 can be connected with the cathode terminal post 2001 and the anode terminal post 2002 respectively, so as to realize the connection of the cathode of the electrolytic cell 1000 with the cathode terminal post 2001 of the electrochemical workstation 2000 and the connection of the anode of the electrolytic cell 1000 with the anode terminal post 2002 of the electrochemical workstation 2000.
[0062] It should be noted that similar reference numerals and letters represent similar items in the drawings of the present application, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
[0063] In the description of the present application, it should be noted that if the terms "center", "edge", "inner", "outer" and the like indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the present application is used, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first", "second" and the like appear in the description of the present application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0064] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "connection" appear, they should be understood broadly, for example, they can be fixedly connected, or detachably connected, or integrally connected; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0065] The embodiments of the present application have been described in detail above, and the principles and implementation modes of the present application have been described by applying specific examples; the above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range can be changed; in view of the above, the content of the specification should not be understood as a limitation on the present application.
Claims
1. An electrolytic cell characterized in that, The electrolytic cell comprises: two flow field plate assemblies arranged oppositely and forming an electrochemical cavity; a diaphragm arranged between the two flow field plate assemblies and separating the electrochemical cavity; a reference electrode arranged on at least one side of the diaphragm, the reference electrode comprising a working end and a connecting end, the working end extending into the electrochemical cavity and connected with the diaphragm, and the connecting end extending out of the electrochemical cavity.
2. The electrolytic cell of claim 1, wherein, The diaphragm comprises an active part and a connecting part, the active part having a catalyst layer and a gas diffusion layer arranged on two sides thereof respectively, the working end being connected with the connecting part, and the working end being spaced apart from the active part.
3. The electrolytic cell of claim 2, wherein, The connecting part surrounds the active part, and the two flow field plate assemblies clamp the connecting part.
4. The electrolytic cell of claim 2, wherein, The electrolytic cell further comprises: an electrolyte filled in the electrochemical cavity, the working end being connected with the connecting part, or the working end being connected with the connecting part through the electrolyte.
5. The electrolytic cell of any one of claims 1-4, wherein, The flow field plate assembly comprises a plate body and a sealing member, the electrochemical cavity being formed between the two plate bodies, and the sealing member being arranged along the edge of the plate body to seal the electrochemical cavity.
6. The electrolytic cell of claim 5, wherein, The reference electrode is arranged between the diaphragm and the sealing member.
7. The electrolytic cell of claim 6, wherein, One side of the sealing member facing the diaphragm is provided with a groove to accommodate the reference electrode.
8. The electrolytic cell of claim 5, wherein, The sealing member comprises a first sealing layer and a second sealing layer, the first sealing layer and the second sealing layer being arranged in a stack between the plate body and the diaphragm, the first sealing layer being arranged closer to the plate body (11) relative to the second sealing layer, and the second sealing layer having a greater elasticity than the first sealing layer.
9. A hydrogen production system by water electrolysis, characterized by, The detection device comprises the electrolytic cell according to any one of claims 1-8.
10. An electrolytic cell in-situ detection device, characterized in that, The detection device comprises the electrolytic cell according to any one of claims 1-8.
11. The in-situ detection device for an electrolytic cell according to claim 10, wherein, The detection device further comprises an electrochemical workstation, the electrochemical workstation being provided with a cathode terminal, an anode terminal and a reference electrode terminal, and the cathode, the anode and the reference electrode of the electrolytic cell being connected with the cathode terminal, the anode terminal and the reference electrode terminal respectively.