Electrode plate and clamp device structure for water electrolysis test

Abstract

The utility model provides an electrode plate and a clamp device structure for an electrolyzed water test. The electrode plate comprises a substrate and a protruding part, wherein the protruding part comprises a reaction flow field region; the water vapor input port and the water vapor output port of the substrate and the water vapor channel in the electrode plate form a water vapor conveying area; and the substrate is also used for collecting and conveying reaction current generated by electrochemical reaction of the membrane electrode assembly. The electrode plate has the functions of providing an electrochemical reaction flow field, providing a water vapor conveying channel and collecting and conveying reaction current at the same time, the assembling problem and the sealing problem of a flow field plate, an end plate and a collector plate which need to be considered by an electrolyzed water test clamp in the related technology are avoided, the assembling is simpler, and the sealing is more reliable. Meanwhile, a clamp device structure is formed by taking the electrode plate as a key part, and under the common assistance of the design of a plurality of parts, the clamp device structure can realize high-pressure sealing of the membrane electrode, so that the membrane electrode is supported to continuously and stably operate under the high pressure of not less than 3MPa.

Description

Technical Field

[0001] The present application relates to the technical field of water electrolysis, and in particular to an electrode plate and a fixture device structure for water electrolysis testing. Background Art

[0002] With the rapid development of science and technology, the use of renewable energy to produce hydrogen by electrolysis of water has been widely used to replace fossil fuels in many fields. Proton Exchange Membrane Electrolysis Cell (PEMEC) has the advantages of high hydrogen production efficiency and relatively environmental protection, and is a promising hydrogen production method. Among them, the production of high-pressure hydrogen by electrolysis of water is conducive to simplifying the hydrogen energy supply chain process, thereby reducing the investment in equipment such as compressors. At the same time, the use of electrochemical isothermal compression to reduce the overall energy consumption is of great significance for reducing the overall cost of hydrogen production from renewable energy. However, the increase in the pressure of hydrogen production by electrolysis of water leads to higher requirements for the airtightness of the electrolyzer; in addition, the stack has higher requirements for the corrosion resistance of the bipolar plate, porous diffusion layer and CCM surface under high-voltage working conditions. In order to support the rapid development of stack component materials suitable for high-voltage operation, we urgently need to design a small PEM water electrolysis test electrode plate and fixture device structure that can support the continuous and stable operation of the membrane electrode under high-voltage conditions. Utility Model Content

[0003] The present invention provides at least one electrolytic water test fixture device structure, in which the electrode plate simultaneously provides an electrochemical reaction flow field, a water vapor transport channel, and the collection and transport of reaction current. This avoids the assembly and sealing issues between the flow field plate, end plate, and current collecting plate required for electrolytic water test fixtures in related technologies, making assembly simpler and sealing more reliable. Furthermore, the fixture device structure is formed with the electrode plate as a key component. With the joint assistance of multiple component designs, the fixture device structure can achieve high-pressure sealing of the membrane electrode, thereby supporting the continuous and stable operation of the membrane electrode at a high pressure of no less than 3MPa.

[0004] The present application provides an electrode plate for water electrolysis testing, comprising a substrate and a protrusion located on the substrate:

[0005] The protrusion includes a reaction flow field area, which is used to provide an electrochemical reaction flow field for the membrane electrode assembly;

[0006] The water vapor input port on the first side surface of the substrate, the water vapor output port on the second side surface opposite to the first side surface, and the water vapor channel inside the electrode plate constitute a water vapor transport area, which is used to transport water or gas required for the electrochemical reaction to the membrane electrode assembly;

[0007] The substrate is also used to collect and transport the reaction current generated by the electrochemical reaction of the membrane electrode assembly.

[0008] In a possible implementation, the protrusion is located at the center of the substrate, and the reaction flow field area is located at the center of the protrusion.

[0009] In a possible implementation, a transition fillet and a reinforcement rib are provided on the boundary line between the protrusion and the base.

[0010] In a possible implementation, the difference between the length of the base and the length of the protrusion is not less than 30 mm, the difference between the width of the base and the width of the protrusion is not less than 30 mm, and the thickness of the protrusion is in the range of 4-10 mm.

[0011] In one possible implementation, the third side surface adjacent to the first side surface on the base includes an electrothermal signal transmission area, the electrothermal signal transmission area is provided with a pole ear, the pole ear is provided with a first current jack corresponding to the high-power current line and a clamping groove corresponding to the voltage sensing clamp, and the non-pole ear area of ​​the electrothermal signal transmission area is provided with a thermocouple socket corresponding to the thermocouple and a second current jack corresponding to the low-power current line.

[0012] In a possible implementation, the electrode plate is made of a corrosion-resistant conductive material, and an anti-corrosion coating is provided on the reaction flow field area.

[0013] An embodiment of the present application also provides a fixture device structure for water electrolysis testing, including the electrode plates described in the aforementioned embodiments, the electrode plates including an anode electrode plate and a cathode electrode plate, and the membrane electrode assembly is arranged between the anode electrode plate and the cathode electrode plate.

[0014] In a possible implementation, the fixture device structure further includes a hard sealing frame, and a sealing groove surrounding the reaction flow field area is provided on the protrusion, and the sealing groove is used for installing a sealing ring.

[0015] In one possible implementation, the fixture device structure further includes a positioning pin, the protrusion is provided with a first positioning hole located outside the reaction flow field area corresponding to the positioning pin, and the membrane electrode assembly is provided with a second positioning hole corresponding to the first positioning hole.

[0016] In one possible implementation, the water electrolysis device structure also includes a first metal gasket, a second metal gasket, a first insulating gasket, and a second insulating gasket. The first metal gasket and the first insulating gasket are arranged in sequence on the outside of the anode electrode plate, and the second metal gasket and the second insulating gasket are arranged in sequence on the outside of the cathode electrode plate.

[0017] In a possible implementation, the water electrolysis device structure further includes a plurality of threaded fasteners, and the substrate of the electrode plate includes a locking area, which is provided with a plurality of bolt holes corresponding one-to-one to the plurality of threaded fasteners.

[0018] In one possible implementation, the torques corresponding to the multiple threaded fasteners are different, the distance between a first threaded fastener among the multiple threaded fasteners and the center of the electrode plate is smaller than the distance between a second threaded fastener among the multiple threaded fasteners and the center of the electrode plate, and the torque of the first threaded fastener is greater than the torque of the second threaded fastener.

[0019] In one possible implementation, the outer side of the substrate of the electrode plate includes a pressing area, which is provided with a pressing block groove corresponding to the pressing block, so that the press applies pressure to the water electrolysis device structure through the pressing block placed on the pressing block groove.

[0020] In summary, the present application provides an electrode plate and fixture device structure for electrolytic water testing, wherein the electrode plate includes a substrate and a protrusion located on the substrate: the protrusion includes a reaction flow field area, which is used to provide an electrochemical reaction flow field for the membrane electrode assembly; the water vapor input port on the first side of the substrate, the water vapor output port on the second side opposite to the first side, and the water vapor channel inside the electrode plate constitute a water vapor transport area, which is used to transport water or gas required for the electrochemical reaction to the membrane electrode assembly; the substrate is also used to collect and transport the reaction current generated by the electrochemical reaction of the membrane electrode assembly. The above-mentioned electrode plate has the functions of providing an electrochemical reaction flow field, providing a water vapor transport channel, and collecting and transporting the reaction current, thereby avoiding the assembly and sealing problems between the flow field plate, end plate, and current collecting plate that need to be considered in the electrolytic water test fixture in the related art, making assembly simpler and sealing more reliable. At the same time, a fixture device structure is formed with the electrode plate as the key component. With the joint assistance of multiple component designs, the fixture device structure can achieve high-pressure sealing of the membrane electrode, thereby supporting the membrane electrode to operate continuously and stably under a high pressure of not less than 3MPa.

[0021] Other advantages of the present application will be explained in more detail with reference to the following description and accompanying drawings.

[0022] It should be understood that the above description is only an overview of the technical solution of this application, so that one can have a general understanding of the technical means of this application and then implement it in accordance with the contents of the description. In order to make the above and other purposes, features and advantages of this application more obvious and easy to understand, the following examples are used to illustrate the specific implementation methods of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. The drawings herein are incorporated into the specification and constitute a part of this specification. These drawings illustrate embodiments that comply with the present application and are used together with the specification to illustrate the technical solutions of the present application. It should be understood that the drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of protection. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings. In the drawings:

[0024] Figure 1 This is an inner side view of an electrode plate provided in an embodiment of the present application;

[0025] Figure 2 This is a diagram of the outer side of an electrode plate provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of a protrusion provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of a sealing area provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of an electrothermal signal transmission area provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of a positioning structure provided in an embodiment of the present application;

[0030] Figure 7 An exploded view of a water electrolysis test fixture provided in an embodiment of the present application;

[0031] Figure 8 A schematic diagram of a bolt hole with different torque distributions provided in an embodiment of the present application.

[0032] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0033] Among them, 100-electrode plate; 101-base; 102-protrusion; 1011-reaction flow field area; 10111-sealing groove; 10112-first positioning hole; 1012-water vapor delivery area; 10121-water vapor input port; 10122-water vapor output port; 10123-electric heating rod socket; 1013-electric heating signal delivery area; 10131-first current socket; 10132-clamping groove; 10133-thermocouple socket; 10134-second current socket; 1014-locking area; 10141-bolt hole; 1015-pressing area; 210-first metal gasket; 220-second metal gasket; 310-first insulating gasket; 320-second insulating gasket; 4-sealing ring; 5-hard sealing frame; 6-membrane electrode assembly; 7-locating pin. DETAILED DESCRIPTION

[0034] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate exemplary embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0035] In the description of the embodiments of the present application, it should be understood that terms such as "including" or "having" are intended to indicate the presence of the disclosed features, numbers, components, parts or combinations thereof in the present specification, and do not exclude the possibility of the presence of one or more other features, numbers, components, parts or combinations thereof.

[0036] Unless otherwise specified, “ / ” means or. For example, A / B can mean A or B. “And / or” in this article is only a way to describe the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0037] The terms "first," "second," etc., are used solely to distinguish identical or similar technical features for ease of description and should not be construed as indicating or implying the relative importance or quantity of these technical features. Thus, a feature defined by "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of the embodiments of this application, unless otherwise specified, the term "plurality" means two or more than two.

[0038] The electrolysis water test fixture in the related art is relatively simple in form, usually including two end plates, two current collecting plates, and two flow field plates. Two current collecting plates are arranged between the two end plates, and two flow field plates are arranged between the two current collecting plates. The membrane electrode to be tested can be arranged between the two flow field plates.

[0039] The above-mentioned electrolyzed water test fixture is complicated to assemble. On the other hand, during use, the end plate and the current collecting plate, and the current collecting plate and the flow field plate need to be sealed. The seal between the plates may fail, thus bringing adverse effects.

[0040] In view of this, the present application provides an electrode plate and fixture device structure for electrolysis water testing. The electrode plate simultaneously has the functions of providing an electrochemical reaction flow field, providing a water vapor transport channel, and collecting and transporting the reaction current. This avoids the assembly and sealing issues between the flow field plate, end plate, and current collecting plate that need to be considered in the electrolysis water test fixture in the related art, making assembly simpler and sealing more reliable. At the same time, the fixture device structure is formed with the electrode plate as the key component. With the joint assistance of multiple component designs, the fixture device structure can achieve high-pressure sealing of the membrane electrode, thereby supporting the membrane electrode to continue to operate stably under a high pressure of not less than 3MPa.

[0041] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] The present application provides an electrode plate for water electrolysis testing, such as Figure 1 and Figure 2 As shown, Figure 1 This is an inner side view of an electrode plate provided in an embodiment of the present application. Figure 2 This is an outer side view of an electrode plate provided in an embodiment of the present application. The electrode plate 100 may include a substrate 101 and a protrusion 102 located on the substrate 101 , and the protrusion 102 is located on the inner side of the substrate 101 .

[0043] The protrusion 102 includes a reaction flow field area 1011, which is used to provide an electrochemical reaction flow field for the membrane electrode assembly 6. The water vapor input port 10121 on the first side of the substrate 101 and the water vapor output port 10122 on the second side opposite to the first side, together with the water vapor channel inside the electrode plate 100, constitute a water vapor transport area 1012. The water vapor transport area is used to transport water or gas required for the electrochemical reaction to the membrane electrode assembly. Water or gas can be input through the water vapor input port 10121. The internal water vapor channel runs through the substrate 101 and the protrusion 102 and leads to the reaction flow field area 1011, and then flows out from the water vapor output port 10122 on the opposite side to complete the water vapor transport. The substrate 101 is also used to collect and transport the reaction current generated by the electrochemical reaction of the membrane electrode assembly 6.

[0044] That is to say, the electrode plate 100 in the present application has the functions of providing an electrochemical reaction flow field, providing a water vapor transport channel, and collecting and transporting the reaction current. It integrates the flow field plate, end plate and current collecting plate in the related technology together, and can be formed by processing a single plate. It avoids the assembly and sealing problems between the flow field plate, end plate and current collecting plate that need to be considered in the related technology, and fundamentally eliminates the impact of the failure of the seal between the plates, making the assembly simpler and the sealing more reliable.

[0045] At the same time, in this application, a clamp device structure is formed with the electrode plate as the key component. With the joint assistance of multiple component designs, the clamp device structure can achieve high-pressure sealing of the membrane electrode, thereby supporting the membrane electrode to operate continuously and stably under a high pressure of not less than 3MPa.

[0046] In a possible implementation, the protrusion 102 may be located at the center of the substrate 101 , and the reaction flow field region 1011 may be located at the center of the protrusion 102 .

[0047] like Figure 1 As shown, the reaction flow field area 1011 located on the protrusion 102 is in a central position, so that the locking stress generated by the threaded fasteners can be further concentrated on the reaction flow field area 1011 located in the center, so that the pressure of the reaction flow field area 1011 is increased, and conditions are further created for achieving high-pressure sealing of the membrane electrode 6.

[0048] In a possible implementation, a transition fillet and a reinforcement rib may be provided on the boundary line between the protrusion 102 and the base 101 .

[0049] like Figure 3 As shown, a transition fillet can be provided on the boundary line between the protrusion 102 and the base 101, and reinforcing ribs can be provided on the four boundary lines between the protrusion 102 and the base 101 to avoid bending of the base 101 due to local stress concentration on the boundary line, and can effectively resist the weakening effect of the compressive stress in the central area of ​​the electrode plate caused by the deformation of the electrode plate under the strong force of the threaded fastener, so that the pressure of the reaction flow field area 1011 located on the protrusion 102 is more uniform, which is beneficial to the operation of the electrode plate 100 under high pressure conditions.

[0050] In one possible implementation, the difference between the length of the base 101 and the length of the protrusion 102 is not less than 30 mm, and the difference between the width of the base 101 and the width of the protrusion 102 is not less than 30 mm, so as to reserve sufficient space for multiple bolt holes 10141 corresponding to threaded fasteners, and the thickness of the protrusion 102 ranges from 4 to 10 mm, so as to reserve sufficient space to test and observe possible leakage between the contact surfaces of the electrode plate 100.

[0051] In one possible implementation, Figure 1 and Figure 5 As shown, the third side surface adjacent to the first side surface on the base 101 may include an electrothermal signal transmission area 1013, and the electrothermal signal transmission area 1013 is provided with a pole ear, and the pole ear is provided with a first current jack 10131 corresponding to the high-power current line and a clamping groove 10132 corresponding to the voltage sensing clamp, and the non-pole ear area of ​​the electrothermal signal transmission area is provided with a thermocouple socket 10133 corresponding to the thermocouple and a second current jack 10134 corresponding to the low-power current line, the first current jack 10131 can be a screw jack, the clamping groove 10132 can be a rectangular groove, and the second current jack 10134 can be a banana-type terminal plug hole.

[0052] When using the electrochemical workstation to perform electrochemical impedance spectroscopy testing at a larger current (>5A), the current line can be clamped at the first current jack 10131, and the voltage test line can be clamped at the clamping groove 10132; when using the electrochemical workstation to perform electrochemical impedance spectroscopy, cyclic voltammetry, linear sweep voltammetry and other tests at a smaller current (<5A), a current line with a banana-type wiring port can be inserted into the second current jack 10134, and the voltage test line can be clamped at the clamping groove 10132.

[0053] By using the above wiring method, the voltage detection port and the current transmission port can be separated by a certain distance, forming a four-electrode test system. In the electrochemical impedance spectroscopy test, the inductance phenomenon in the high-frequency region of the two-electrode method can be effectively avoided, making the test results more accurate.

[0054] In one possible implementation, the first side of the substrate 101 may also include an electric heating rod socket 10123, which is used to insert the electric heating rod. In actual applications, the temperature control system of the test bench can control the heating power of the electric heating rod by collecting the thermocouple signal from the electric heating signal transmission area 1013, thereby achieving the purpose of electrode plate temperature control.

[0055] In one possible implementation, the electrode plate 100 can be made of a corrosion-resistant conductive material. For example, the electrode plate 10 can be made of a corrosion-resistant conductive plate such as a titanium plate or a 316L stainless steel plate. The reaction flow field area 1011 can be provided with an anti-corrosion coating to enhance the chemical stability of the electrode plate 100 during use.

[0056] The present application also provides a fixture device structure for water electrolysis testing, including the electrode plates described in the aforementioned embodiments, wherein the electrode plates may include an anode electrode plate 110 and a cathode electrode plate 120, and a membrane electrode assembly 6 may be arranged between the anode electrode plate 110 and the cathode electrode plate 120, so that the membrane electrode assembly 6 can be subjected to a water electrolysis test through the anode electrode plate 110 and the cathode electrode plate 120. In one possible implementation, the fixture device structure may further include a hard sealing frame 5, and a sealing groove 10111 surrounding the reaction flow field region 1011 may be provided on the protrusion 102, and the sealing groove 10111 is used to install a sealing ring 4.

[0057] like Figure 4 As shown, a sealing groove 10111 is provided on the protrusion 102, surrounding the reaction flow field area 1011. The sealing groove 10111 may be rectangular and may be used to install a sealing ring 4. Together with a hard sealing frame 5 of a certain thickness, a high-pressure sealing area may be formed. In practical applications, the high-pressure sealing area may withstand high pressure exceeding 3 MPa.

[0058] In one possible implementation, Figure 6 As shown, the water electrolysis device structure may further include a positioning pin 7, a first positioning hole 10112 corresponding to the positioning pin 7 and located outside the reaction flow field area 1011 is provided on the protrusion 102, and a second positioning hole corresponding to the first positioning hole 10112 is provided on the membrane electrode assembly 6. The first positioning hole 10112 and the second positioning hole cooperate with the positioning pin 7 to facilitate accurate positioning of the various components of the membrane electrode assembly 6 during installation, thereby improving assembly reliability and repeatability.

[0059] like Figure 6 As shown, there can be two positioning pins 7, and the corresponding first positioning holes 10112 and second positioning holes can also be two respectively. The two first positioning holes set on the protrusion 102 are respectively arranged at the diagonals of the protrusion 102, and the two second positioning holes on the membrane electrode assembly 6 are also respectively arranged at the diagonals on the membrane resistor assembly 6. In actual applications, the size of the first positioning hole and the second positioning hole can be 3-5mm.

[0060] In one possible implementation, Figure 7As shown, the water electrolysis device structure may further include a first metal gasket 210, a second metal gasket 220, a first insulating gasket 310, and a second insulating gasket 320. The first metal gasket 210 and the first insulating gasket 310 are sequentially arranged on the outside of the anode electrode plate 110, and the second metal gasket 220 and the second insulating gasket 320 are sequentially arranged on the outside of the cathode electrode plate 120. The provision of the first metal gasket and the second metal gasket effectively reduces the localized point-like compression deformation caused by the threaded fastener on the first insulating gasket and the second insulating gasket with lower hardness, thereby solving the torque relaxation problem that may occur during long-term operation.

[0061] That is, with the anode electrode plate 110 and the cathode electrode plate 120 as key components, in conjunction with the first metal gasket 210, the second metal gasket 220, the first insulating gasket 310, the second insulating gasket 320, the sealing ring 4 and the hard insulating frame 5 on both sides, the membrane electrode assembly 6 can be tested, which is simpler than the assembly of the electrolysis water test fixture in the related art.

[0062] In a possible implementation, the fixture device structure may further include a plurality of threaded fasteners, such as Figure 1 As shown, the base plate of the electrode plate 100 includes a locking area 1014 , and the locking area 1014 is provided with a plurality of bolt holes 10141 corresponding one-to-one to a plurality of threaded fasteners.

[0063] In one possible implementation, the torques corresponding to the multiple threaded fasteners are different, the distance between the first threaded fastener among the multiple threaded fasteners and the center of the electrode plate 100 is smaller than the distance between the second threaded fastener among the multiple threaded fasteners and the center of the electrode plate 100, and the torque of the first threaded fastener is greater than the torque of the second threaded fastener.

[0064] like Figure 8 As shown, the 12 groups of threaded fasteners applied to the 12 bolt holes can adopt different torques. The threaded fasteners corresponding to the 1-8 bolt holes are the first threaded fasteners, and a torque of 10 N·m is applied to the 1-8 bolt holes. The threaded fasteners corresponding to the 9-12 bolt holes are the second threaded fasteners, and a torque of 4 N·m is applied to the 9-12 bolt holes. This can achieve the concentrated distribution of pressure on the central active part to achieve the best sealing effect, thereby further ensuring that the electrode plate can withstand high-pressure operation.

[0065] In one possible implementation, Figure 2 As shown, the outer side of the substrate 101 of the electrode plate 100 may include a press area 1015, and the press area 1015 is provided with a pressing block groove corresponding to the pressing block, so that the press can apply pressure to the water electrolysis device structure through the pressing block placed on the pressing block groove. For example, the press can provide a fixed pressure of 2-6 MPa to the water electrolysis device structure through the pressing block.

[0066] When a press is used to provide the fixing pressure, threaded fasteners are not required, and the outer side of the electrode plate 100 may not include the bolt holes 10141 or may leave the bolt holes 10141 idle.

[0067] It should be noted that, with the assistance of multiple designs on the fixture device structure, the contact surface between the protrusion 102 of the electrode plate 100 and the membrane electrode can generate a uniformly distributed planar pressure of no less than 2 MPa.

[0068] At the same time, based on the clamp device structure including multiple threaded fasteners, combined with the aforementioned sealing structure including the sealing ring 4 and the hard sealing frame 5, the clamp device structure can achieve high-pressure sealing of the membrane electrode, thereby supporting the membrane electrode to operate continuously and stably under a high pressure of not less than 3MPa.

[0069] In one possible implementation, when a certain voltage is applied between the electrolysis water test fixtures, in order to prevent possible external current generation, the water vapor transmission pipeline corresponding to the water vapor transmission channel must be an insulating tube. When operating under high voltage, a high-voltage resistant insulating hose can be further used.

[0070] In summary, the present application provides an electrode plate and fixture device structure for electrolytic water testing, wherein the electrode plate includes a substrate and a protrusion located on the substrate: the protrusion includes a reaction flow field area, which is used to provide an electrochemical reaction flow field for the membrane electrode assembly; the water vapor input port on the first side of the substrate, the water vapor output port on the second side opposite to the first side, and the water vapor channel inside the electrode plate constitute a water vapor transport area, which is used to transport water or gas required for the electrochemical reaction to the membrane electrode assembly; the substrate is also used to collect and transport the reaction current generated by the electrochemical reaction of the membrane electrode assembly. The above-mentioned electrode plate has the functions of providing an electrochemical reaction flow field, providing a water vapor transport channel, and collecting and transporting the reaction current, thereby avoiding the assembly and sealing problems between the flow field plate, end plate, and current collecting plate that need to be considered in the electrolytic water test fixture in the related art, making assembly simpler and sealing more reliable. At the same time, in this application, a clamp device structure is formed with the electrode plate as the key component. With the joint assistance of multiple component designs, the clamp device structure can achieve high-pressure sealing of the membrane electrode, thereby supporting the membrane electrode to operate continuously and stably under a high pressure of not less than 3MPa. The multiple designs include: 1) the protrusion arranged in the center can concentrate the fastening force generated by the threaded fastener in the flow field area; 2) the rounded corner transition and reinforcing ribs arranged around the protrusion arranged in the center can effectively resist the weakening effect of the electrode plate deformation caused by the strong force of the threaded fastener on the compressive stress in the central area of ​​the electrode plate; 3) the torque of the first threaded fastener and the second threaded fastener are set differently, so that the pressure distribution in the flow field area of ​​the electrode plate is more uniform; 4) the setting of the first metal gasket and the second metal gasket effectively weakens the local point-like compression deformation of the threaded fastener on the first insulating gasket and the second insulating gasket with lower hardness, which can solve the torque relaxation problem that may occur during long-term operation.

[0071] In addition, the electrode plate can provide a first current jack corresponding to the high-power current line, a clamping groove corresponding to the voltage sensing clamp, a thermocouple socket corresponding to the thermocouple, and a second current jack corresponding to the low-power current line, so that the electrolysis water test fixture has the function of supporting multiple types of electrochemical tests.

[0072] In the description of this specification, the description with reference to the terms "some possible embodiments", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application, and the above terms do not necessarily represent the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0073] Although the spirit and principles of the present application have been described above with reference to several specific embodiments, it should be understood that the present application is not limited to the specific embodiments disclosed, and the division into various aspects does not mean that the features of these aspects cannot be combined. The present application is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An electrode plate for water electrolysis testing, characterized in that: The invention comprises a base (101) and a protrusion (102) located on the base (101): The protrusion (102) includes a reaction flow field area (1011), and the reaction flow field area (1011) is used to provide an electrochemical reaction flow field for the membrane electrode assembly (6); The water vapor input port (10121) on the first side surface of the substrate (101), the water vapor output port (10122) on the second side surface opposite to the first side surface, and the water vapor channel inside the electrode plate (100) constitute a water vapor transport area (1012), and the water vapor transport area (1012) is used to transport water or gas required for electrochemical reaction to the membrane electrode assembly; The substrate (101) is also used to collect and transport the reaction current generated by the electrochemical reaction of the membrane electrode assembly (6).

2. The electrode plate for water electrolysis testing according to claim 1, characterized in that: The protrusion (102) is located at the center of the substrate (101), and the reaction flow field area (1011) is located at the center of the protrusion (102).

3. The electrode plate for water electrolysis testing according to claim 1, characterized in that: A transition fillet and a reinforcement rib are provided on the boundary line between the protrusion (102) and the base (101).

4. The electrode plate for water electrolysis testing according to claim 1, characterized in that: The difference between the length of the base (101) and the length of the protrusion (102) is not less than 30 mm, the difference between the width of the base (101) and the width of the protrusion (102) is not less than 30 mm, and the thickness of the protrusion (102) ranges from 4 to 10 mm.

5. The electrode plate for water electrolysis testing according to claim 1, characterized in that: The third side surface of the base (101) adjacent to the first side surface includes an electrothermal signal transmission area (1013), and the electrothermal signal transmission area (1013) is provided with a pole ear, and the pole ear is provided with a first current socket (10131) corresponding to the high-power current line and a clamping groove (10132) corresponding to the voltage sensing clamp, and the non-pole ear area of ​​the electrothermal signal transmission area is provided with a thermocouple socket (10133) corresponding to the thermocouple and a second current socket (10134) corresponding to the low-power current line.

6. The electrode plate for water electrolysis testing according to claim 1, characterized in that: The electrolysis water test electrode plate (100) is made of a corrosion-resistant conductive material, and an anti-corrosion coating is provided on the reaction flow field area (1011).

7. A fixture device structure for electrolysis water testing, characterized in that: The electrode plate comprises an electrode plate according to any one of claims 1 to 6, wherein the electrode plate comprises an anode electrode plate (110) and a cathode electrode plate (120), and the membrane electrode assembly (6) is arranged between the anode electrode plate (110) and the cathode electrode plate (120).

8. The fixture device structure for water electrolysis testing according to claim 7, characterized in that: The fixture device structure further comprises a hard sealing frame (5); a sealing groove (10111) surrounding the reaction flow field region (1011) is provided on the protrusion (102); and the sealing groove (10111) is used for installing a sealing ring (4).

9. The fixture device structure for water electrolysis testing according to claim 7, characterized in that: The fixture device structure also includes a positioning pin (7) and a corresponding positioning hole thereof; the protrusion (102) is provided with a first positioning hole (10112) corresponding to the positioning pin (7) and located outside the reaction flow field area (1011); and the membrane electrode assembly is provided with a second positioning hole corresponding to the first positioning hole (10112).

10. The fixture device structure for water electrolysis testing according to claim 7, characterized in that: The clamp device structure further includes a first metal gasket (210), a second metal gasket (220), a first insulating gasket (310) and a second insulating gasket (320), wherein the first metal gasket (210) and the first insulating gasket (310) are sequentially arranged on the outside of the anode electrode plate (110), and the second metal gasket (220) and the second insulating gasket (320) are sequentially arranged on the outside of the cathode electrode plate (120).

11. The fixture device structure for water electrolysis testing according to claim 7, characterized in that: The clamp device structure further comprises a plurality of threaded fasteners, and the base plate of the electrode plate (100) comprises a locking area (1014), wherein the locking area (1014) is provided with a plurality of bolt holes (10141) corresponding one-to-one to the plurality of threaded fasteners.

12. The fixture device structure for water electrolysis testing according to claim 11, characterized in that: The multiple threaded fasteners respectively correspond to different torques, a distance between a first threaded fastener among the multiple threaded fasteners and the center of the electrode plate (100) is smaller than a distance between a second threaded fastener among the multiple threaded fasteners and the center of the electrode plate (100), and a torque of the first threaded fastener is greater than a torque of the second threaded fastener.

13. The fixture device structure for water electrolysis testing according to claim 10, characterized in that: The outer side of the substrate of the electrode plate includes a press-fitting area (1015), and the press-fitting area (1015) is provided with a pressing block groove corresponding to the pressing block, so that the press applies pressure to the fixture device structure for electrolysis water testing through the pressing block placed on the pressing block groove.

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