Electrolyzed water test fixture polar plate and test fixture with polar plate

Abstract

The utility model discloses an electrolytic water test fixture polar plate and a test fixture with the polar plate. The polar plate comprises a polar plate body and a sealing rubber strip; grooves are circumferentially formed in the outer part of the flow field region on the polar plate body; the sealing rubber strip is arranged in the groove; the sealing rubber strip comprises a rubber strip body and a plurality of protrusion pairs arranged on the rubber strip body. Each protrusion pair comprises two protrusions arranged on the two sides of the adhesive tape body. One protrusion, close to the flow field area, in each protrusion pair makes contact with the first side of the groove, the other protrusion, away from the flow field area, in each protrusion pair makes contact with the second side of the groove, and the first side of the groove and the second side of the groove are oppositely arranged. The bottom of the adhesive tape body is used for being in contact with the bottom surface of the groove, and the top of the adhesive tape body is used for being in contact with a hard insulating frame of the electrolytic water test fixture and generating deformation, so that the top surface of the groove is flush. The clamp comprises a polar plate. The polar plate disclosed by the utility model can avoid function damage caused by using a binder, and is strong in sealing capability.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen production, and in particular relates to a polar plate of a water electrolysis test fixture and a test fixture with the polar plate. Background Art

[0002] Using renewable energy to electrolyze water to produce hydrogen, replacing fossil fuels for transportation and / or industrial applications, is a key technological path to achieving carbon emission reduction. Producing high-pressure hydrogen from water electrolysis helps simplify the hydrogen supply chain, thereby reducing investment in compressor equipment. Furthermore, utilizing electrochemical isothermal compression to reduce overall energy consumption is crucial for lowering the overall cost of renewable energy hydrogen production. However, increasing the pressure required for hydrogen production from water electrolysis increases the airtightness requirements of the electrolyzer. Furthermore, operating the stack at high pressure (2-3 MPa) places higher demands on the corrosion resistance of the bipolar plates, porous diffusion layer, and CCM (catalytically coated proton exchange membrane) surfaces. To support the rapid development of materials for stack components suitable for high-voltage operation, a small-scale PEM (proton exchange membrane) water electrolysis test fixture was designed that could sustain stable and sustained membrane electrode operation under high-voltage conditions. The plates, as key components of the test fixture, ensured a good seal with the membrane electrode, which was crucial for the test fixture's ability to withstand high-voltage conditions.

[0003] For most small-scale test fixtures currently available for hydrogen production by water electrolysis, the pressure-bearing capacity between the electrode plate and the membrane electrode is limited, with a maximum pressure of no more than 1 MPa (megapascal). In existing high-pressure water electrolysis stacks, the plate structure of the plate metal body matches the active reaction area of ​​the membrane electrode. A groove is provided around the flow field area, with one side of the sealing strip installed in the groove and the other side in contact with a hard insulating frame. The cathode plate and anode plate on both sides of the membrane electrode assembly adopt a similar structure. When the cathode plate, membrane electrode assembly, and anode plate are in contact with each other in a certain manner and at a certain pressure, the sealing strip is compressed, and a high-pressure-resistant sealing area is formed between it and the hard insulating frame to ensure that the high-pressure gas generated by the electrochemical reaction of the membrane electrode does not leak out.

[0004] As a part of the plate, the sealing strip needs to be fixed to the metal body of the plate in a certain way to prevent it from falling off. There are two common fixing methods: 1. Glue method; whether the sealing strip adopts a rectangular cross-section or a specially designed multi-peak cross-section, it needs to be attached to the groove of the plate with special glue (such as Figure 1 、 Figure 2As shown). However, the inconsistency of the glue coating process, the instability of the manual glue application technology, and the failure of the glue during the operation of the battery stack and repeated disassembly and assembly may all lead to glue failure. The glue removal and / or re-application process after glue failure is not only time-consuming and labor-intensive, but may not necessarily restore the plate function. 2. Nesting method: Use commercially available O-rings to nest in the inner wall of the plate groove (such as Figure 3 As shown), although this method can prevent the sealing strip from falling off, since the sealing strip is stretched during use, the additional stress and / or deformation generated has an adverse effect on the sealing ability and life of the plate. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the prior art and provide a high-voltage water electrolysis test fixture plate and a test fixture having the plate, which can avoid functional damage caused by the use of adhesives and has strong sealing ability.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a plate for an electrolytic water testing fixture, comprising: a plate body and a sealing strip; wherein a groove is provided on the outer circumference of the flow field area on the plate body; the sealing strip is provided in the groove; the sealing strip comprises a strip body and a plurality of protrusion pairs provided on the strip body; each of the protrusion pairs comprises two protrusions provided on both sides of the strip body; one protrusion in each protrusion pair close to the flow field area contacts the first side of the groove, and the other protrusion in each protrusion pair away from the flow field area contacts the second side of the groove, and the first side of the groove and the second side of the groove are arranged opposite to each other; the bottom of the strip body is used to contact the bottom surface of the groove, and the top of the strip body is used to contact and deform with the hard insulating frame of the electrolytic water testing fixture, so as to achieve levelness with the top surface of the groove.

[0007] Furthermore, the two protrusions in each protrusion pair are located on both sides of the same position on the rubber strip body and are arranged opposite to each other.

[0008] Furthermore, both protrusions in each protrusion pair are hemispherical and / or semi-ellipsoidal.

[0009] Furthermore, the shapes of the groove and the sealing strip match the shape of the flow field area and / or the active area of ​​the membrane electrode assembly of the water electrolysis test fixture.

[0010] Furthermore, the sealing strip is configured to be square or rectangular.

[0011] Furthermore, one or more pairs of protrusions are provided on each side of the sealing strip.

[0012] Furthermore, the cross section of the rubber strip body is circular.

[0013] Furthermore, the electrode plate is a monopolar plate, and the flow field area and the groove are provided on the side of the electrode plate body of the monopolar plate, and the sealing strip is provided in the groove; the electrode plate is a bipolar plate, and the flow field area and the groove are provided on the first side and the second side of the electrode plate body of the bipolar plate, and the sealing strip is provided in the groove, and the first side of the electrode plate body and the second side of the electrode plate body are arranged opposite to each other.

[0014] Furthermore, the sealing strip is made of an elastomer, the Shore A hardness of the elastomer is 70 to 90, and the compression rate of the sealing strip is 15 to 30%.

[0015] Furthermore, a precious metal coating is provided on the surface of the flow field area of ​​the electrode body.

[0016] A water electrolysis test fixture, the water electrolysis test fixture comprising: a first end plate, a first electrode plate, a first hard insulating frame, a membrane electrode assembly, a second hard insulating frame, a second electrode plate and a second end plate; wherein the first electrode plate and the second electrode plate are both the water electrolysis test fixture electrode plates; the first end plate, the first electrode plate, the first hard insulating frame, the membrane electrode assembly, the second hard insulating frame, the second electrode plate and the second end plate are connected together by fasteners; a flow field area and a sealing strip are provided on the first side surface of the first electrode plate, and the first hard insulating frame is provided between the first side surface of the first electrode plate and the first side surface of the membrane electrode assembly; the first end plate, the first electrode plate, the first hard insulating frame, the membrane electrode assembly, the second hard insulating frame, the second electrode plate and the second end plate are connected together by fasteners; a flow field area and a sealing strip are provided on the first side surface of the first electrode plate, and the first hard insulating frame is provided between the first side surface of the first electrode plate and the first side surface of the membrane electrode assembly; A side surface of a rigid insulating frame is used to contact the sealing strip in the first electrode plate; the second side surface of the first electrode plate, which is opposite to the first side surface, is arranged on the inner side of the first end plate; a flow field area and a sealing strip are arranged on the first side surface of the second electrode plate, and a second rigid insulating frame is arranged between the first side surface of the second electrode plate and the second side surface of the membrane electrode assembly; a side surface of the second rigid insulating frame is used to contact the sealing strip in the second electrode plate; the second side surface of the second electrode plate, which is opposite to the first side surface, is arranged on the inner side of the second end plate; the first side surface of the membrane electrode assembly and the second side surface of the membrane electrode assembly are arranged opposite to each other.

[0017] Furthermore, the first electrode plate and the first end plate are integrated into one body, and the second electrode plate and the second end plate are integrated into one body.

[0018] Furthermore, a first insulating plate is provided between the second side surface of the first electrode plate and the inner side surface of the first end plate, and a second insulating plate is provided between the second side surface of the second electrode plate and the inner side surface of the second end plate.

[0019] Furthermore, the first electrode plate and the second electrode plate are both monopolar plates.

[0020] Furthermore, the number of the first rigid insulating frame and the second rigid insulating frame is the same as that of the membrane electrode assembly and both are multiple. The electrolysis water testing fixture also includes a bipolar plate. The flow field area and the sealing strip are provided on the first side and the second side of the bipolar plate. The first side of the bipolar plate and the second side of the bipolar plate are arranged opposite to each other, and the bipolar plate is arranged between the first rigid insulating frame and the second rigid insulating frame adjacent to the first rigid insulating frame.

[0021] Furthermore, there are multiple bipolar plates.

[0022] Furthermore, the membrane electrode assembly includes a proton membrane coated with a catalytic layer, a first porous diffusion layer and a second porous diffusion layer, the first porous diffusion layer and the second porous diffusion layer are located on both sides of the outside of the proton membrane coated with the catalytic layer, the first porous diffusion layer is used to be embedded in the hollow area of ​​the first rigid insulating frame, and the second porous diffusion layer is used to be embedded in the hollow area of ​​the second rigid insulating frame.

[0023] Furthermore, the outer dimensions of the first rigid insulating frame, the outer dimensions of the second rigid insulating frame, the outer dimensions of the first electrode plate, and the outer dimensions of the second electrode plate match.

[0024] Furthermore, the first rigid insulating frame and the second rigid insulating frame are both polyethylene naphthalate boards.

[0025] Furthermore, the first electrode plate is an anode electrode plate and / or a cathode electrode plate, and the second electrode plate is a cathode electrode plate and / or an anode electrode plate.

[0026] Furthermore, the first end plate and the second end plate are both provided with connection holes for use with the fasteners, and the first end plate and the second end plate are connected together by the fasteners and clamp the first electrode plate, the first hard insulating frame, the membrane electrode assembly, the second hard insulating frame, the bipolar plate and the second electrode plate.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The plates of the electrolysis water test fixture of the present invention are provided with sealing strips, which do not require the use of adhesives, thereby eliminating the risk of damage to the plate function caused by adhesive failure from the source. The sealing strips are not easy to fall off, and are not easy to be stretched during use, thereby not generating additional stress and deformation, thereby improving the sealing ability and life of the plates. In addition, the plates with sealing strips can support the membrane electrode assembly to operate continuously and stably under high-voltage conditions.

[0029] 2. The sealing strips of the plates of the electrolytic water test fixture of the present invention can be easily compressed, have good sealing performance, and good pressure resistance, while not being overly pressurized, and can be installed by simply pressing.

[0030] 3. The two protrusions in each protrusion pair of the sealing strip of the plate of the electrolysis water test fixture of the present invention are both hemispherical and / or semi-ellipsoidal, which can further improve the sealing effect. It has a simple structure, is easy to use, and is easy to shape.

[0031] 4. The shapes of the grooves and sealing strips of the plates of the electrolysis water test fixture of the present invention match the shapes of the flow field area and / or the active area of ​​the membrane electrode assembly, which can facilitate the use of a hard insulating frame to press the sealing strips into the grooves, and facilitate the formation of a high-pressure resistant sealing area between the grooves and the sealing strips and the hard insulating frame to ensure that the high-pressure gas generated during the electrochemical reaction of the membrane electrode assembly does not leak out, thereby supporting the continuous and stable operation of the membrane electrode assembly under high-voltage conditions.

[0032] 5. The electrolysis water test fixture of the utility model has a simple plate structure, is easy to use, has a wide range of applications, and is economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of a specific embodiment of a prior art sealing strip affixed to a plate groove by glue is shown;

[0034] Figure 2 A schematic structural diagram of a specific embodiment of a prior art sealing strip affixed to a plate groove by glue is shown;

[0035] Figure 3 A schematic structural diagram of a specific embodiment of an O-ring embedded in the inner side wall of a plate groove in the prior art is shown;

[0036] Figure 4 A schematic structural diagram of a specific embodiment of the water electrolysis test fixture plate of the present invention is shown;

[0037] Figure 5A cross-sectional schematic diagram of a specific embodiment of the present invention showing a sealing rubber strip of a plate of a water electrolysis test fixture, wherein the rubber strip body is disposed in a groove and each pair of protrusions contacts the inner walls on both sides of the groove;

[0038] Figure 6 A cross-sectional schematic diagram showing a specific embodiment of the present invention in which the sealing rubber strip body of the electrode plate of the electrolysis water test fixture is arranged in a groove;

[0039] Figure 7 A schematic structural diagram of a specific embodiment of the water electrolysis test fixture plate of the present invention when in use is shown;

[0040] Figure 8 A schematic structural diagram of a specific embodiment of the electrolysis water testing fixture of the present utility model is shown;

[0041] Figure 9 A schematic structural diagram of another specific embodiment of the electrolysis water testing fixture of the present invention is shown;

[0042] Figure 10 A schematic structural diagram of another specific embodiment of the electrolysis water testing fixture of the present utility model is shown;

[0043] Figure 11 A structural schematic diagram of a specific embodiment of the utility model is shown, which shows the comparison of the leakage rate of the electrolyzed water test fixture at 3 MPa pressure when newly assembled and after running for 1500 hours.

[0044] Among them, 1-plate body; 11-flow field area; 12-groove; 2-sealing strip; 21-strip body; 22-pair of protrusions; 221-protrusion; 3-membrane electrode assembly; 31-active area; 32-proton membrane coated with catalytic layer; 33-first porous diffusion layer; 34-second porous diffusion layer; 4-first end plate; 5-first plate; 6-first rigid insulating frame; 61-first hollow area; 7-second rigid insulating frame; 71-second hollow area; 8-second plate; 9-second end plate; 101-first insulating plate; 102-second insulating plate. DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0046] The directional terms used in this invention, such as "inner," "outer," "top," "bottom," and "axial," are used only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding the invention, and are not intended to limit the invention.

[0047] like Figures 4 to 7As shown, the electrolysis water test fixture plate proposed by the present invention includes: a plate body 1 and a sealing strip 2. Among them;

[0048] A groove 12 is provided on the outer circumference of the flow field area 11 of the electrode body 1 .

[0049] The sealing strip 2 is arranged in the groove 12. The sealing strip 2 includes a strip body 21 and a plurality of protrusion pairs 22 arranged on the strip body 21. Each protrusion pair 22 includes two protrusions 221 arranged on both sides of the strip body 21. One protrusion 221 close to the flow field area 11 in each protrusion pair 22 contacts the first side inner wall of the groove 12, and the other protrusion 221 away from the flow field area 11 in each protrusion pair 22 contacts the second side inner wall of the groove 12. The first side inner wall of the groove 12 and the second side inner wall of the groove 12 are arranged opposite to each other. The bottom of the strip body 21 is used to contact the bottom surface of the groove 12, and the top of the strip body 21 is used to contact and deform with the hard insulating frame of the electrolysis water test fixture, so as to achieve levelness with the top surface of the groove 12.

[0050] Among them, the sealing strip 2 can be installed only by simple manual pressing, without the use of adhesive (glue), eliminating the risk of damage to the plate function caused by adhesive failure from the source. In addition, the sealing strip 2 is not easy to fall off, and is not easy to be stretched during use, so it will not generate additional stress and deformation, thereby improving the sealing ability (including high-pressure sealing ability) and life of the plate. And the plate with the sealing strip 2 can support the membrane electrode assembly 3 to operate continuously and stably under high pressure (2 to 4 MPa (megapascals)) conditions. The hardness of the hard insulating frame is based on the standard that no obvious normal and lateral deformation can be generated when it contacts the sealing strip 2 under a certain pressure. This is because excessive deformation will reduce the compression rate of the sealing strip 2 in the plate, thereby affecting its high-pressure sealing ability.

[0051] In a specific embodiment, Figures 4 to 7 As shown, the two protrusions 221 in each protrusion pair 22 are located on both sides of the same position on the rubber strip body 21 and are arranged opposite to each other, which has a good sealing effect, a simple structure, is easy to use, and is easy to shape.

[0052] In a specific embodiment, Figure 4 、 Figure 5 、 Figure 7 As shown, the two protrusions 221 in each protrusion pair 22 are both hemispherical and / or semi-ellipsoidal, which can further improve the sealing effect, and have a simple structure, are easy to use, and are easy to shape.

[0053] In a specific embodiment, Figure 4 、 Figure 7As shown, the shapes of the groove 12 and the sealing strip 2 match the shape of the flow field area 11 and / or the active area 31 of the membrane electrode assembly 3 of the electrolysis water test fixture, which can facilitate the use of a hard insulating frame to press the sealing strip 2 into the groove 12, and facilitate the formation of a high-pressure resistant sealing area between the groove 12 and the sealing strip 2 and the hard insulating frame to ensure that the high-pressure gas generated by the membrane electrode assembly 3 during the electrochemical reaction does not leak out.

[0054] In a specific embodiment, Figure 4 、 Figure 7 As shown, the sealing strip 2 is configured in a square or rectangular shape, which can be easily placed in the groove 12 and has a simple structure and is easy to use.

[0055] In a specific embodiment, Figure 4 、 Figure 7 As shown, each side of the sealing strip 2 is provided with one or more protrusion pairs 22. When there are multiple protrusion pairs 22 on each side of the sealing strip 2, the sealing effect of the sealing strip 2 can be further improved, and the sealing strip 2 is less likely to fall off.

[0056] In a specific embodiment, Figures 4 to 7 As shown, the cross section of the rubber strip body 21 is circular, which is convenient for installation by simple manual pressing and is easy to be deformed by contact with the hard insulating frame.

[0057] In a specific embodiment, Figures 4 to 7 As shown, the plate is a monopolar plate, and a flow field area 11 is provided on one side of the plate body 1 of the monopolar plate. A groove 12 is provided circumferentially outside the flow field area 11, and a sealing strip 2 is provided in the groove 12; or,

[0058] The electrode plate is a bipolar plate, and the first side and the second side of the electrode plate body 1 of the bipolar plate are both provided with flow field areas 11. The outside of the flow field areas 11 on the first side and the second side of the electrode plate body 1 are both circumferentially provided with grooves 12, and sealing strips 2 are provided in the grooves 12. The first side and the second side are arranged opposite to each other.

[0059] The electrode plate may be a monopolar plate and / or a bipolar plate, which can increase the application range of the electrode plate.

[0060] In a specific embodiment, Figures 4 to 7 As shown, the sealing strip 2 is made of an elastomer and can be easily compressed.

[0061] In a specific embodiment, the Shore A hardness of the elastomer is 70-90, and it has good sealing performance and good pressure resistance. At the same time, the sealing strip 2 can be installed by simply pressing.

[0062] In a specific embodiment, Figures 4 to 7 As shown, the compression rate of the sealing strip 2 is 15-30%, the sealing performance is good, and it will not bear excessive pressure, thereby increasing the service life.

[0063] In a specific embodiment, the electrode plate is made of a corrosion-resistant metal material, which can increase the service life and meet actual needs. Preferably, the electrode plate is made of titanium.

[0064] In a specific embodiment, a precious metal coating of a certain thickness is deposited on the surface of the flow field region 11 of the electrode body 1, which can play an anti-corrosion protection role.

[0065] When the present invention is used, the sealing strip 2 can eliminate the risk of damage to the plate function caused by adhesive failure from the source, and the sealing strip 2 is not easy to fall off. At the same time, it is not easy to be stretched during use, and no additional stress and deformation will be generated, thereby improving the sealing ability and life of the plate. In addition, the plate with the sealing strip 2 can support the membrane electrode assembly 3 to operate continuously and stably under high-voltage conditions.

[0066] Based on the above embodiments, Figures 8-10 As shown, the present invention also proposes an electrolysis water test fixture, comprising: a first end plate 4, a first electrode plate 5, a first rigid insulating frame 6, a membrane electrode assembly 3, a second rigid insulating frame 7, a second electrode plate 8 and a second end plate 9.

[0067] The first electrode plate 5 and the second electrode plate 8 are both electrode plates of the electrolysis water test fixture.

[0068] The first end plate 4 , the first electrode plate 5 , the first rigid insulating frame 6 , the membrane electrode assembly 3 , the second rigid insulating frame 7 , the second electrode plate 8 and the second end plate 9 are connected together by fasteners.

[0069] A flow field region 11 and a sealing strip 2 are provided on the first side of the first electrode plate 5. A first rigid insulating frame 6 is provided between the first side of the first electrode plate 5 and the first side of the membrane electrode assembly 3. The side of the first rigid insulating frame 6 is configured to contact the sealing strip 2 within the first electrode plate 5. A second side of the first electrode plate 5, facing away from the first side, is provided on the inner side of the first end plate 4.

[0070] A flow field region 11 and a sealing strip 2 are provided on the first side of the second electrode plate 8. A second rigid insulating frame 7 is provided between the first side of the second electrode plate 8 and the second side of the membrane electrode assembly 3. The side of the second rigid insulating frame 7 is used to contact the sealing strip 2 within the second electrode plate 8. The second side of the second electrode plate 8, which is opposite to the first side, is provided on the inner side of the second end plate 9. The first side of the membrane electrode assembly 3 and the second side of the membrane electrode assembly 3 are arranged opposite each other.

[0071] Among them, the first end plate 4, the first electrode plate 5, the first rigid insulating frame 6, the membrane electrode assembly 3, the second rigid insulating frame 7, the second electrode plate 8 and the second end plate 9 are connected together by fasteners, which can make the first electrode plate 5, the membrane electrode assembly 3 and the second electrode plate 8 contact each other through a certain pressure, thereby making the sealing strip 2 in the first electrode plate 5 and the sealing strip 2 in the second electrode plate 8 compressed. The sealing strip 2 in the first electrode plate 5 and the first rigid insulating frame 6 and the sealing strip 2 in the second electrode plate 8 and the second rigid insulating frame 7 can all be surrounded by a high-pressure sealing area, thereby ensuring that the high-pressure gas generated by the membrane electrode assembly 3 during the electrochemical reaction does not leak out. For example, if a sealing capacity of more than 3 MPa is formed between the first electrode plate 5 and / or the second electrode plate 8 and the membrane electrode assembly 3, then this can be achieved by applying pressure on the first end plate 4 and / or the second end plate 9 by the locking force of the fasteners.

[0072] In a specific embodiment, Figure 8 As shown, the first electrode plate 5 is integrated with the first end plate 4, and the second electrode plate 8 is integrated with the second end plate 9, resulting in a simple structure and easy use. In addition, because there is no insulating plate between the second side surface of the first electrode plate 5 and the inner side of the first end plate 4, and no insulating plate is provided between the second side surface of the second electrode plate 8 and the inner side of the second end plate 9, charge accumulates on both the first end plate 4 and the second end plate 9. Therefore, the air and / or water inlet and outlet pipes of the first electrode plate 5 and / or the second electrode plate 8 must be insulated and pressure-resistant pipes.

[0073] In a specific embodiment, Figure 9 、 Figure 10 As shown, a first insulating plate 101 is provided between the second side surface of the first electrode plate 5 and the inner side surface of the first end plate 4, and a second insulating plate 102 is provided between the second side surface of the second electrode plate 8 and the inner side surface of the second end plate 9. The function of the first insulating plate 101 and / or the second insulating plate 102 is to prevent charge accumulation on the first end plate 4 and / or the second end plate 9 when a voltage is applied to the first electrode plate 5 / the second electrode plate 8.

[0074] In a specific embodiment, Figures 8-10 As shown, the first electrode plate 5 and the second electrode plate 8 are both monopolar plates, which can meet actual needs, have a simple structure, and are easy to use.

[0075] In a specific embodiment, Figure 10As shown, the number of the first rigid insulating frame 6 and the second rigid insulating frame 7 is the same as that of the membrane electrode assembly 3 and both are multiple. The electrolysis water test fixture also includes a bipolar plate, and the first side and second side of the bipolar plate are both provided with a flow field area 11 and a sealing strip 2. The first side of the bipolar plate and the second side of the bipolar plate are arranged opposite to each other, and the bipolar plate is arranged between the first rigid insulating frame 6 and the second rigid insulating frame 7 adjacent to the first rigid insulating frame 6. Among them, the first rigid insulating frame 6, the second rigid insulating frame 7 and the membrane electrode assembly 3 are all provided in multiple numbers, which can facilitate the formation of a small short stack.

[0076] In a specific embodiment, Figure 10 As shown, the number of bipolar plates is multiple, which can further facilitate the formation of a required small short stack.

[0077] In a specific embodiment, Figure 7 As shown, the membrane electrode assembly 3 includes a proton membrane 32 coated with a catalytic layer, a first porous diffusion layer 33, and a second porous diffusion layer 34. The first porous diffusion layer 33 and the second porous diffusion layer 34 are located on both sides of the exterior of the proton membrane 32 coated with the catalytic layer. The first porous diffusion layer 33 is embedded in the first hollow region 61 of the first rigid insulating frame 6, and the second porous diffusion layer 34 is embedded in the second hollow region 71 of the second rigid insulating frame 7. Embedding the first porous diffusion layer 33 in the first hollow region 61 of the first rigid insulating frame 6 and the second porous diffusion layer 34 in the second hollow region 71 of the second rigid insulating frame 7 ensures that when the first electrode plate 5, the membrane electrode assembly 3, and the second electrode plate 8 are in contact in a certain manner and at a certain pressure, the high-pressure gas generated during the electrochemical reaction of the membrane electrode assembly 3 is prevented from leaking out, and portions of the membrane electrode assembly 3 outside the active region 31 are prevented from participating in the electrolysis reaction.

[0078] In a specific embodiment, Figures 7-10 As shown, the outer dimensions of the first rigid insulating frame 6, the outer dimensions of the second rigid insulating frame 7, the outer dimensions of the first electrode plate 5 and the outer dimensions of the second electrode plate 8 match. When the first electrode plate 5, the membrane electrode assembly 3 and the second electrode plate 8 are in contact with each other at a certain pressure in a certain manner, and the sealing strip 2 in the first electrode plate 5 and the sealing strip 2 in the second electrode plate 8 are both compressed, it is possible to form a high-pressure resistant sealing area between the sealing strip 2 in the first electrode plate 5 and the first rigid insulating frame 6, and between the sealing strip 2 in the second electrode plate 8 and the second rigid insulating frame 7, thereby ensuring that the high-pressure gas generated by the membrane electrode assembly 3 during the electrochemical reaction does not leak out.

[0079] In a specific embodiment, Figures 7-10As shown, the first rigid insulating frame 6 and the second rigid insulating frame 7 are both polyethylene naphthalate boards, which have good gas barrier properties, good chemical stability and good heat resistance.

[0080] In a specific embodiment, the first electrode plate 5 is an anode electrode plate and / or a cathode electrode plate, and the second electrode plate 8 is a cathode electrode plate and / or an anode electrode plate.

[0081] In a specific embodiment, Figures 8-10 As shown, the first end plate 4 and the second end plate 9 are both provided with connection holes for use with fasteners. The first end plate 4 and the second end plate 9 are connected together by the fasteners and clamp the first electrode plate 5, the first rigid insulating frame 6, the membrane electrode assembly 3, the second rigid insulating frame 7, and the second electrode plate 8 together, which can facilitate the formation of a seal with a strength of more than 3 MPa between the first electrode plate 5 and / or the second electrode plate 8 and the membrane electrode assembly 3. Specifically, when the electrolysis water test fixture also includes a bipolar plate, the first end plate 4 and the second end plate 9 are connected together by fasteners and clamp the first electrode plate 5, the first rigid insulating frame 6, the membrane electrode assembly 3, the second rigid insulating frame 7, the bipolar plate, and the second electrode plate 8 together.

[0082] In a specific embodiment, Figure 11 As shown in the figure, by comparing the leakage rate of the electrolysis water test fixture at 3 MPa pressure when newly assembled and after 1500 hours of operation, it was found that the electrolysis water test fixture has excellent and long-lasting high-pressure sealing capabilities, which can support the continuous and stable operation of the electrolysis water membrane electrode under 3 MPa conditions. Specifically, the experimental measurement shows that the leakage rate of the electrolysis water test fixture at 3 MPa is no more than 10‰ per hour, and the sealing ability has not declined after 1500 hours of continuous operation.

[0083] When the test fixture of the present invention is used, the first end plate 4, the first electrode plate 5, the first rigid insulating frame 6, the membrane electrode assembly 3, the second rigid insulating frame 7, the bipolar plate, the second electrode plate 8 and the second end plate 9 are connected together by fasteners, so that the first electrode plate 5, the membrane electrode assembly 3 and the second electrode plate 8 can be in contact with each other through a certain pressure, thereby causing the sealing strip 2 in the first electrode plate 5 and the sealing strip 2 in the second electrode plate 8 to be compressed. A high-pressure resistant sealing area can be formed between the sealing strip 2 in the first electrode plate 5 and the first rigid insulating frame 6, and between the sealing strip 2 in the second electrode plate 8 and the second rigid insulating frame 7, thereby ensuring that the high-pressure gas generated by the membrane electrode assembly 3 during an electrochemical reaction does not leak out.

[0084] The scope of protection of the present invention is not limited to the above-described embodiments. Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the scope and spirit of the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A plate for an electrolytic water test fixture, characterized in that: include: The plate body (1) and the sealing strip (2); wherein, A groove (12) is provided on the outer circumference of the flow field area (11) on the electrode body (1); The sealing rubber strip (2) is arranged in the groove (12); the sealing rubber strip (2) includes a rubber strip body (21) and a plurality of protrusion pairs (22) arranged on the rubber strip body (21); each of the protrusion pairs (22) includes two protrusions (221) arranged on both sides of the rubber strip body (21); one of the protrusions (221) in each of the protrusion pairs (22) close to the flow field area (11) contacts the first side of the groove (12), and each of the protrusion pairs (22) is in contact with the first side of the groove (12). Another protrusion (221) in (22) away from the flow field area (11) contacts the second side of the groove (12), and the first side of the groove (12) and the second side of the groove (12) are arranged opposite to each other; the bottom of the rubber strip body (21) is used to contact the bottom surface of the groove (12), and the top of the rubber strip body (21) is used to contact the hard insulating frame of the electrolysis water test fixture and generate deformation, so as to achieve levelness with the top surface of the groove (12).

2. The electrolysis water test fixture plate according to claim 1, characterized in that: The two protrusions (221) in each protrusion pair (22) are located on both sides of the same position on the rubber strip body (21) and are arranged opposite to each other.

3. The electrolysis water test fixture plate according to claim 1, characterized in that: The two protrusions (221) in each protrusion pair (22) are both hemispherical and / or semi-ellipsoidal.

4. The electrolysis water test fixture plate according to claim 1, characterized in that: The shapes of the groove (12) and the sealing strip (2) are matched with the shape of the flow field area (11) and / or the active area (31) of the membrane electrode assembly (3) of the water electrolysis test fixture.

5. The electrolysis water test fixture plate according to claim 4, characterized in that: The sealing strip (2) is arranged in a square or rectangular shape.

6. The electrolysis water test fixture plate according to claim 5, characterized in that: One or more protrusion pairs (22) are provided on each side of the sealing strip (2).

7. The electrolysis water test fixture plate according to claim 1, characterized in that: The cross section of the rubber strip body (21) is circular.

8. The electrolysis water test fixture plate according to claim 1, characterized in that: The electrode plate is a monopolar plate, and the flow field area (11) and the groove (12) are provided on the side of the electrode plate body (1) of the monopolar plate, and the sealing strip (2) is provided in the groove (12); The electrode plate is a bipolar plate, and the flow field area (11) and the groove (12) are both provided on the first side and the second side of the electrode plate body (1) of the bipolar plate, the sealing strip (2) is provided in the groove (12), and the first side of the electrode plate body (1) and the second side of the electrode plate body (1) are arranged opposite to each other.

9. The electrolysis water test fixture plate according to claim 1, characterized in that: The sealing strip (2) is made of an elastomer, the Shore A hardness of the elastomer is 70-90, and the compression rate of the sealing strip (2) is 15-30%.

10. The electrolysis water test fixture plate according to claim 1, characterized in that: The surface of the flow field area (11) of the electrode body (1) is provided with a noble metal coating.

11. An electrolysis water testing fixture, characterized in that: The electrolysis water test fixture comprises: a first end plate (4), a first electrode plate (5), a first hard insulating frame (6), a membrane electrode assembly (3), a second hard insulating frame (7), a second electrode plate (8) and a second end plate (9); wherein, The first electrode plate (5) and the second electrode plate (8) are both electrode plates of the electrolysis water test fixture according to any one of claims 1 to 10; The first end plate (4), the first electrode plate (5), the first rigid insulating frame (6), the membrane electrode assembly (3), the second rigid insulating frame (7), the second electrode plate (8) and the second end plate (9) are connected together by fasteners; A flow field region (11) and a sealing strip (2) are provided on the first side surface of the first electrode plate (5); a first rigid insulating frame (6) is provided between the first side surface of the first electrode plate (5) and the first side surface of the membrane electrode assembly (3); a side surface of the first rigid insulating frame (6) is used to contact the sealing strip (2) inside the first electrode plate (5); a second side surface of the first electrode plate (5) that is away from the first side surface is provided on the inner side of the first end plate (4); A flow field area (11) and a sealing strip (2) are provided on the first side of the second electrode plate (8); a second hard insulating frame (7) is provided between the first side of the second electrode plate (8) and the second side of the membrane electrode assembly (3); the side of the second hard insulating frame (7) is used to contact the sealing strip (2) in the second electrode plate (8); the second side of the second electrode plate (8) opposite to the first side is provided on the inner side of the second end plate (9); the first side of the membrane electrode assembly (3) and the second side of the membrane electrode assembly (3) are arranged opposite to each other.

12. The electrolyzed water testing fixture according to claim 11, characterized in that: The first electrode plate (5) and the first end plate (4) are integrated into one body, and the second electrode plate (8) and the second end plate (9) are integrated into one body.

13. The electrolyzed water testing fixture according to claim 11, characterized in that: A first insulating plate (101) is provided between the second side surface of the first electrode plate (5) and the inner side surface of the first end plate (4), and a second insulating plate (102) is provided between the second side surface of the second electrode plate (8) and the inner side surface of the second end plate (9).

14. The electrolyzed water testing fixture according to claim 11, characterized in that: The first pole plate (5) and the second pole plate (8) are both monopolar plates.

15. The electrolyzed water testing fixture according to claim 11, characterized in that: The number of the first rigid insulating frame (6) and the second rigid insulating frame (7) is the same as that of the membrane electrode assembly (3) and both are multiple. The electrolysis water test fixture also includes a bipolar plate. The flow field area (11) and the sealing strip (2) are provided on the first side and the second side of the bipolar plate. The first side of the bipolar plate and the second side of the bipolar plate are arranged opposite to each other. The bipolar plate is arranged between the first rigid insulating frame (6) and the second rigid insulating frame (7) adjacent to the first rigid insulating frame (6).

16. The electrolyzed water testing fixture according to claim 15, characterized in that: There are multiple bipolar plates.

17. The electrolyzed water testing fixture according to claim 11, characterized in that: The membrane electrode assembly (3) comprises a proton membrane (32) coated with a catalytic layer, a first porous diffusion layer (33) and a second porous diffusion layer (34), wherein the first porous diffusion layer (33) and the second porous diffusion layer (34) are located on both sides of the outside of the proton membrane (32) coated with the catalytic layer, the first porous diffusion layer (33) is used to be embedded in a first hollow area (61) of the first rigid insulating frame (6), and the second porous diffusion layer (34) is used to be embedded in a second hollow area (71) of the second rigid insulating frame (7).

18. The electrolyzed water testing fixture according to claim 11, characterized in that: The peripheral dimensions of the first rigid insulating frame (6), the peripheral dimensions of the second rigid insulating frame (7), the peripheral dimensions of the first electrode plate (5), and the peripheral dimensions of the second electrode plate (8) match each other.

19. The electrolyzed water testing fixture according to claim 11, characterized in that: The first rigid insulating frame (6) and the second rigid insulating frame (7) are both made of polyethylene naphthalate boards.

20. The electrolyzed water testing fixture according to claim 11, characterized in that: The first electrode plate (5) is an anode electrode plate and / or a cathode electrode plate, and the second electrode plate (8) is a cathode electrode plate and / or an anode electrode plate.

21. The electrolyzed water testing fixture according to claim 11, characterized in that: The first end plate (4) and the second end plate (9) are both provided with connection holes for use with the fasteners. The first end plate (4) and the second end plate (9) are connected together by the fasteners and clamp and fix the first electrode plate (5), the first rigid insulating frame (6), the membrane electrode assembly (3), the second rigid insulating frame (7) and the second electrode plate (8).

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