A high-pressure water electrolysis hydrogen production device

Abstract

The present invention discloses a high-pressure water electrolysis hydrogen production device, including an electrolytic cell stack and a high-pressure clamping structure. The electrolytic cell stack includes a plurality of pole plates and membrane electrodes that are alternately stacked in sequence. Titanium felt and carbon paper are respectively arranged on both sides of the membrane electrode, and a carbon paper pressing groove is arranged on the pole plate near the carbon paper side. The high-pressure clamping structure clamps the electrolytic cell stack, and the carbon paper is pressed into the carbon paper pressing groove. During the clamping installation, excessive compression of the carbon paper is avoided, thereby improving the service life of the water electrolytic cell. The carbon paper pressing groove controls the compression amount of the carbon paper, so that the compression of the carbon paper is always within a limit. The moderate compression of the carbon paper improves the mass transfer capacity of hydrogen while ensuring that the high-pressure water electrolysis hydrogen production device does not leak, thereby improving the performance of the water electrolytic cell.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen energy, and in particular to a high-pressure water electrolysis hydrogen production device. Background Art

[0002] Hydrogen energy is considered the most ideal energy carrier and energy storage method due to its advantages of being clean, pollution-free, efficient, storable and easy to transport. Among them, the PEM water electrolysis hydrogen production technology is used. The proton exchange membrane high-pressure water electrolysis hydrogen production device is composed of multiple electrolyzer units. It can produce hydrogen and oxygen at the cathode and anode of the electrolyzer respectively through the reaction: 2H2O+electricity=2H2+O2. The produced hydrogen is stored in a gas tank after treatment, thereby producing clean hydrogen.

[0003] The existing high-pressure water electrolysis hydrogen production device uses a silicone gasket, which is easily deformed during the high-pressure compression process, resulting in water leakage and other problems. In addition, if the pressure is too small, the gap between the membrane electrode and the gasket cannot be eliminated, thereby failing to reduce resistance and save electricity.

[0004] In addition, since the water electrolyzer produces H+ at the anode, the pH value of the anode is strongly acidic. Using traditional carbon paper as a diffusion layer is prone to corrosion of the carbon paper. Therefore, titanium felt is used as the diffusion layer on the anode side of the PEM water electrolyzer, while carbon paper is still used as the catalytic layer on the cathode side to save costs. If the carbon paper exceeds a certain compression limit during the compression process, it is easy to cause irreversible mechanical damage, which affects the mass transfer of hydrogen on the anode side. Therefore, it is urgent to design a high-pressure water electrolysis hydrogen production device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a high-pressure water electrolysis hydrogen production device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0006] The technical solutions adopted to solve the above technical problems are:

[0007] The present invention provides a high-pressure water electrolysis hydrogen production device, comprising an electrolytic cell stack and a high-voltage clamping structure, wherein the electrolytic cell stack comprises a plurality of pole plates and membrane electrodes alternately stacked in sequence, titanium felt and carbon paper are respectively arranged on both sides of the membrane electrode, and a carbon paper pressing groove is arranged on the pole plate close to the carbon paper side.

[0008] The beneficial effects of the present invention are:

[0009] The high-voltage clamping structure clamps the electrolyzer stack, and the carbon paper is pressed into the carbon paper pressing groove. During the clamping installation, the excessive compression of the carbon paper is avoided, and the service life of the water electrolyzer is improved. The carbon paper pressing groove controls the compression amount of the carbon paper, so that the compression of the carbon paper is always within the limit. The moderate compression of the carbon paper ensures that the high-voltage water electrolysis hydrogen production device does not leak, while improving the mass transfer capacity of hydrogen and improving the performance of the water electrolyzer.

[0010] As a further improvement of the above technical solution, a sealing gasket is arranged between the electrode plate and the membrane electrode, the sealing gasket is sealed to the frame of the membrane electrode, the electrode plate is provided with a sealing groove, the sealing gasket is arranged in the sealing groove, and the bottom area of ​​the sealing groove is larger than the area of ​​the sealing gasket.

[0011] The sealing gasket can prevent water leakage, and the bottom area of ​​the sealing groove is larger than the area of ​​the sealing gasket, leaving horizontal space for the deformation of the sealing gasket under the action of large compression force, thereby preventing air leakage. That is, the deformation of the sealing gasket can be controlled by setting the sealing groove, thereby extending the service life of the sealing gasket.

[0012] As a further improvement of the above technical solution, the sealing gaskets on both sides of the membrane electrode are respectively a wide sealing gasket and a narrow sealing gasket, and the electrolytic cell stack is within the coverage of the wide sealing gasket.

[0013] During the compression installation, the sealing gasket may be misaligned relative to the membrane electrode. In order to solve this problem, a wide sealing gasket and a narrow sealing gasket are respectively provided. Under the action of the large clamping force during the assembly of the electrolyzer stack, the narrow sealing gasket can be completely pressed on the wide sealing gasket, playing a good sealing role. Even if there is a certain misalignment during the installation process, the narrow sealing gasket can be completely pressed on the wide sealing gasket. The design of the wide and narrow sealing gaskets reduces to a certain extent the problem that the two sealing gaskets provided on both sides of the membrane electrode cannot completely overlap under the action of the large clamping force, thereby forming a shear force on both sides of the membrane electrode frame, thereby avoiding mechanical damage to the frame of the membrane electrode.

[0014] As a further improvement of the above technical solution, the electrode plate includes an anode plate and a cathode plate that are bonded to each other, the anode plate is close to the titanium felt side, the cathode plate is close to the carbon paper side, the sealing gasket arranged between the cathode plate and the membrane electrode is a wide sealing gasket, and the sealing gasket between the anode plate and the membrane electrode is a narrow sealing gasket.

[0015] During design, the pressure on the cathode side is greater than the pressure on the anode side, so the sealing gasket on the cathode side is a wide sealing gasket, and the sealing gasket on the anode side is a narrow sealing gasket, which can achieve a better sealing effect.

[0016] As a further improvement of the above technical solution, the high-voltage clamping structure includes multiple screw members, bottom plate end plates and cover plate end plates respectively arranged on both sides of the electrolytic cell stack, and the screw members pass through the bottom plate end plates and cover plate end plates in sequence to clamp the electrolytic cell stack.

[0017] The bottom plate end plate and the cover plate end plate on both sides of the electrolytic cell stack are clamped by screw rods, thereby clamping and fixing the electrolytic cell stack.

[0018] As a further improvement of the above technical solution, the bottom plate end plate and the cover plate end plate are both provided with a plurality of positioning holes, the pole plate and the membrane electrode are both provided with a plurality of positioning grooves, and the positioning holes and the positioning grooves are arranged in a one-to-one correspondence.

[0019] During installation, the positioning holes and positioning grooves are arranged one by one and are all on the same straight line, so that during installation, the base plate end plate, cover plate end plate, electrode plate and membrane electrode correspond accurately, which is convenient for installation and reduces the occurrence of misalignment.

[0020] As a further improvement of the above technical solution, insulating plates and current collecting plates are provided on both sides of the electrolytic cell stack, and the current collecting plates are embedded in the insulating plates, so that the structure is more compact.

[0021] As a further improvement of the above technical solution, the electrode plate includes a monopolar plate located on both sides of the electrolytic cell stack, and the monopolar plate is arranged on the current collecting plate and the insulating plate.

[0022] As a further improvement of the above technical solution, a sealing ring is provided between the monopolar plate and the insulating plate, the monopolar plate is provided with a sealing installation groove, and the sealing ring is arranged in the sealing installation groove. The sealing ring plays a sealing role, and the sealing installation groove is convenient for installing the sealing ring.

[0023] As a further improvement of the above technical solution, the bottom area of ​​the sealing installation groove is larger than the area of ​​the sealing ring, so as to control the compression deformation of the sealing ring and extend the service life of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0025] Figure 1 This is a high-pressure water electrolysis hydrogen production device provided by the present invention, and a structural schematic diagram of one embodiment thereof;

[0026] Figure 2 This is a high-pressure water electrolysis hydrogen production device provided by the present invention, and a structural schematic diagram of one embodiment thereof;

[0027] Figure 3 This is a side view of an embodiment of a high-pressure water electrolysis hydrogen production device provided by the present invention;

[0028] Figure 4 This is a high-pressure water electrolysis hydrogen production device provided by the present invention, and a structural schematic diagram of a double-stage plate in one embodiment;

[0029] Figure 5 This is a high-pressure water electrolysis hydrogen production device provided by the present invention, and a structural schematic diagram of a narrow sealing gasket in one embodiment thereof;

[0030] Figure 6 It is a high-pressure water electrolysis hydrogen production device provided by the present invention, and a structural schematic diagram of a wide sealing gasket in one embodiment thereof;

[0031] Figure 7 The present invention provides a high-pressure water electrolysis hydrogen production device, and a partial structural schematic diagram of one embodiment thereof. Description of the drawings:

[0033] Bottom plate end plate 110, threaded hole 111, bottom plate insulating plate 120, first current collecting plate 130, membrane electrode 140, carbon paper pressing groove 141, second current collecting plate 150, cover plate insulating plate 160, cover plate end plate 170, positioning hole 171, screw rod group 180, spring disc 181, bipolar plate 210, wide sealing groove 211, narrow sealing groove 212, cathode monopolar plate 220, anode monopolar plate 230, titanium felt 240, carbon paper 250, wide sealing gasket 260, narrow sealing gasket 270. DETAILED DESCRIPTION

[0034] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] Hydrogen energy is considered the most ideal energy carrier and energy storage method due to its advantages of being clean, pollution-free, efficient, storable and easy to transport. The application of hydrogen obtained by electrolyzing water through power generation has attracted more and more attention. Among them, the use of PEM water electrolysis hydrogen production technology can realize the redistribution of power resources in time and space dimensions and the diversified use of electrolysis products, which can greatly improve the comprehensive utilization efficiency of energy and reduce carbon emissions.

[0039] The proton exchange membrane high-pressure water electrolysis hydrogen production device is composed of multiple electrolyzer units, which can produce clean hydrogen through reactions: hydrogen and oxygen are produced at the cathode and anode of the electrolyzer respectively, and the produced hydrogen is stored in a gas tank after treatment.

[0040] Since the existing water electrolyzer seals the sheet-shaped plates, the heat generated by the plates cannot be dissipated. The purpose of controlling the temperature of the high-pressure water electrolysis hydrogen production device can be achieved by introducing cooling water into the water electrolyzer through water cooling.

[0041] The existing high-pressure water electrolysis hydrogen production device uses a silicone gasket, which is easily deformed during the compression process with high pressure, resulting in water leakage, etc., and the gap between the membrane electrode 140 and the gasket cannot be eliminated if the pressure is too small, thereby failing to reduce resistance and save electricity.

[0042] Since the water electrolyzer generates H+ at the anode, the pH value of the anode is strongly acidic. The use of traditional carbon paper 250 as a diffusion layer is prone to corrosion of the carbon paper 250. Therefore, the anode side of the PEM water electrolyzer uses titanium felt 240 as a diffusion layer, while the cathode side still uses carbon paper 250 as a catalytic layer to save costs. The carbon paper 250 exceeds a certain compression limit during the compression process, which is prone to irreversible mechanical damage and affects the mass transfer of hydrogen on the anode side. Therefore, referring to Figures 1 to 7 The present invention provides a high-pressure water electrolysis hydrogen production device to make the following embodiments:

[0043] In some embodiments, a high-pressure water electrolysis hydrogen production device includes an electrolyzer stack and a high-pressure clamping structure. The high-pressure clamping structure is used to clamp the electrolyzer stack. Figure 1As shown, a schematic diagram of the assembly structure of a high-pressure water electrolysis hydrogen production device is shown, which includes, from bottom to top, a bottom plate end plate 110, a bottom plate insulating plate 120, a first current collecting plate 130, a plurality of polar plates and membrane electrodes 140 alternately stacked in sequence, a second current collecting plate 150, a cover plate insulating plate 160, and a cover plate end plate 170. Among them, the current collecting plate is divided into a first current collecting plate 130 and a second current collecting plate 150, and the insulating plate is divided into a bottom plate insulating plate 120 and a cover plate insulating plate 160.

[0044] The electrode plates include a bipolar plate 210 and a monopolar plate. The bipolar plate 210 includes an anode plate and a cathode plate that are bonded to each other. Membrane electrodes 140 are arranged on both sides of the bipolar plate 210. The monopolar plate is divided into a cathode monopolar plate 220 and an anode monopolar plate 230. The membrane electrode 140 is arranged on only one side of the monopolar plate. Therefore, there are multiple bipolar plates 210 and membrane electrodes 140. The multiple bipolar plates 210 and membrane electrodes 140 are alternately stacked up and down. The monopolar plate arranged on the lower side of the multiple bipolar plates 210 and membrane electrodes 140 is the cathode monopolar plate 220, and the monopolar plate arranged on the upper side of the multiple bipolar plates 210 and membrane electrodes 140 is the anode monopolar plate 230.

[0045] Titanium felt 240 and carbon paper 250 are respectively provided on both sides of the membrane electrode 140, the anode plate is close to the titanium felt 240 side, the cathode plate is close to the carbon paper 250 side, and the bipolar plate 210 is close to the carbon paper 250 side. A carbon paper pressing groove 141 is provided. The high-pressure clamping structure clamps the electrolytic cell stack, and the carbon paper 250 is pressed into the carbon paper pressing groove 141. During the clamping installation, excessive compression of the carbon paper 250 is avoided, thereby improving the service life of the water electrolyzer. The carbon paper pressing groove 141 controls the compression amount of the carbon paper 250, so that the compression of the carbon paper 250 is always within the limit. The moderate compression of the carbon paper 250 not only ensures that the high-pressure water electrolysis hydrogen production device does not leak, but also improves the mass transfer capacity of hydrogen and improves the performance of the water electrolyzer.

[0046] Furthermore, a sealing gasket is provided between the electrode plate and the membrane electrode 140, the sealing gasket is sealed and fitted with the frame of the membrane electrode 140, the electrode plate is provided with a sealing groove, the sealing gasket is provided in the sealing groove, and the bottom area of ​​the sealing groove is larger than the area of ​​the sealing gasket. The sealing gaskets on both sides of the membrane electrode 140 are respectively a wide sealing gasket 260 and a narrow sealing gasket 270, and the electrolyzer stack is within the coverage of the wide sealing gasket 260.

[0047] During the compression installation, the sealing gasket may be misaligned relative to the membrane electrode 140. In order to solve this problem, a wide sealing gasket 260 and a narrow sealing gasket 270 are respectively provided. Under the action of the large clamping force during the assembly of the electrolytic cell stack, the narrow sealing gasket 270 can be completely pressed on the wide sealing gasket 260, playing a good sealing role. Even if there is a certain misalignment during the installation process, the narrow sealing gasket 270 can be completely pressed on the wide sealing gasket 260. The design of the wide sealing gasket 260 and the narrow sealing gasket 270 reduces to a certain extent the problem that the two sealing gaskets provided on both sides of the membrane electrode 140 cannot be completely overlapped under the action of the large clamping force, thereby forming a shear force on both sides of the membrane electrode 140 frame, thereby avoiding mechanical damage to the frame of the membrane electrode 140.

[0048] In some other embodiments, two sealing pads of the same width may be provided, and corresponding sealing grooves may be provided. Similarly, the sealing pad can prevent water leakage, and the bottom area of ​​the sealing groove is larger than the area of ​​the sealing pad, which leaves horizontal space for the deformation of the sealing pad under the action of a large pressing force, thereby preventing air leakage. That is, the deformation amount of the sealing pad can be controlled by setting the sealing groove, thereby extending the service life of the sealing pad.

[0049] Reference Figure 3 As shown in further detail, the frame of the membrane electrode 140 is in sealing contact with the anode plate of the upper bipolar plate 210 through a narrow sealing gasket 270. Figure 3 The anode plate of the middle upper bipolar plate 210 is not shown, and its structure is the same as that of the anode plate. A wide sealing groove 211 is provided on the upper side of the cathode plate, and the setting of the wide sealing groove 211 can control the deformation of the wide sealing gasket 260 to 25%, thereby extending the service life of the wide sealing gasket 260. A narrow sealing groove 212 is provided on the lower side of the anode plate, and the setting of the narrow sealing groove 212 can control the deformation of the narrow sealing gasket 270 to 30%, thereby extending the service life of the narrow sealing ring.

[0050] Figure 3 As shown, the narrow sealing gasket 270 on the anode side and the wide sealing gasket 260 on the cathode side are arranged on both sides of the frame of the membrane electrode 140. Under the action of the large clamping force when assembling the high-pressure water electrolyzer, the narrow sealing gasket 270 can be completely pressed on the wide sealing gasket 260, playing a good sealing role, avoiding the two sealing gaskets from not being able to completely overlap under the action of the large clamping force, thereby avoiding shear force on both sides of the frame of the membrane electrode 140, and avoiding mechanical damage to the frame of the membrane electrode 140.

[0051] Figure 3As shown, titanium felt 240 is selected as the catalyst layer on the anode side, and carbon paper 250 is selected as the catalyst layer on the cathode side. The cathode plate membrane electrode 140 is provided with a carbon paper pressing groove 141. Under the action of a large clamping force, the carbon paper 250 is pressed into the carbon paper pressing groove 141. The setting of the carbon paper pressing groove 141 can control the compression amount of the carbon paper 250 to 17%, thereby avoiding mechanical damage caused by excessive compression of the cathode catalyst layer by a large clamping force, which affects the mass transfer of the gas. The titanium felt 240 of the catalyst layer on the anode side of the membrane electrode 140 is incompressible, so there is no need to set a pressing groove structure on the anode plate.

[0052] Other structures are further described below.

[0053] The cover plate insulating plate 160 and the bottom plate insulating plate 120 are symmetrically distributed in the vertical direction. The bottom plate insulating plate 120 and the first current collecting plate 130 are assembled in a nested manner, and the cover plate insulating plate 160 and the second current collecting plate 150 are assembled in a nested manner.

[0054] Conductive lugs 131 are provided on the first current collecting plate 130 and the second current collecting plate 150 . The conductive lugs 131 of the two current collecting plates are respectively connected to the positive and negative electrodes of the DC power supply. During the water electrolysis process, the external DC power supply provides the electrolytic cell with current for water electrolysis through the first current collecting plate 130 and the second current collecting plate 150 .

[0055] The cover plate end plate 170 is provided with a cover plate sealing groove at the lower side, and a cover plate sealing ring is used to achieve sealing contact between the cover plate insulating plate 160 and the cover plate end plate 170 .

[0056] The second current collecting plate 150 is in direct contact with the anode monopolar plate 230 . A sealing installation groove is provided on the upper side of the anode monopolar plate 230 , and a sealing contact is achieved between the anode monopolar plate 230 and the cover plate insulating plate 160 via a sealing ring.

[0057] The first current collecting plate 130 is in direct contact with the cathode monopolar plate 220 , and the periphery of the cathode monopolar plate 220 is in direct contact with the bottom plate insulating plate 120 .

[0058] The bottom plate end plate 110 and the cover plate end plate 170 are both provided with threaded holes 111 , and the cover plate end plate 170 is provided with two hydrogen outlets, a reaction water inlet, a reaction water oxygen outlet, a cooling water inlet, and a cooling water outlet.

[0059] The bottom plate end plate 110 and the cover plate end plate 170 are provided with positioning holes 171, and the bottom plate insulating plate 120, the cathode monopolar plate 220, the bipolar plate 210, the anode monopolar plate 230, and the cover plate insulating plate 160 are all provided with positioning grooves, which facilitates installation and reduces the possibility of misalignment.

[0060] During the positioning and installation process, the positioning rod passes through the positioning hole 171 of the bottom plate end plate 110 to play a positioning role, and the positioning grooves of the bottom plate insulating plate 120, the first current collecting plate 130, the cathode monopolar plate 220, the bipolar plate 210, the anode monopolar plate 230, the second current collecting plate 150, and the cover plate end plate 170 pass through the positioning rod and are installed in sequence in the vertical direction.

[0061] The bottom plate end plate 110 and the cover plate end plate 170 are in close contact with other components under the pressure of the press 7t, and are fastened through the screw holes under the action of the spring disc 181 and the screw group 180.

[0062] Each component of the present embodiment is provided with positioning holes 171 and positioning grooves, which facilitate the rapid installation of the high-pressure water electrolysis hydrogen production device, ensure the sealing structure of the high-pressure water electrolysis hydrogen production device, avoid the slippage of the bipolar plate 210 or other components during the pressing process, and improve the installation efficiency of the high-pressure water electrolysis hydrogen production device.

[0063] like Figure 2 As shown, a schematic diagram of the assembly structure of the bipolar plate 210 is shown, which includes a wide sealing gasket 260, a cathode plate, a rubber ring, an anode plate, and a narrow sealing gasket 270 arranged in sequence from top to bottom.

[0064] A cathode flow field and a sealing groove are arranged on the upper side of the cathode plate, a carbon paper pressing groove 141 is arranged on the upper side of the cathode plate, a wide sealing gasket 260 is installed in the sealing groove, and the width of the wide sealing gasket 260 is smaller than the width of the cathode flow field sealing groove, leaving horizontal space for the deformation of the sealing gasket under the action of large pressing force to prevent air leakage.

[0065] The cathode plate is provided with two hydrogen outlet structures, and the hydrogen in the flow channel can be discharged to both hydrogen outlet structures.

[0066] A glue groove is provided on the lower side of the cathode plate, and a cooling water flow field is provided on the upper side of the anode plate. The lower side of the cathode plate is in close contact with the upper side of the anode plate through a rubber ring. Under hot pressing, the rubber ring melts and sticks the cathode plate and the anode plate together to form a bipolar plate 210.

[0067] A sealing groove and an anode flow field are provided on the lower side of the anode plate, and a narrow sealing gasket 270 is installed in the sealing groove. The width of the narrow sealing groove 212 is smaller than the width of the anode flow field sealing groove, leaving horizontal space for the deformation of the sealing gasket under the action of large pressing force to prevent leakage.

[0068] The anode plate is provided with an inlet (outlet) structure for reaction water and an inlet (outlet) structure for cooling water.

[0069] During the assembly of the water electrolyzer, Figure 1The hydrogen outlet arranged on the middle cover plate end plate 170 is kept consistent in vertical position with the hydrogen outlet structure in the bipolar plate 210 , and a hydrogen manifold is formed after assembly.

[0070] The inlet and outlet of the reaction water arranged on the cover plate end plate 170 are vertically aligned with the inlet structure and outlet structure of the reaction water in the bipolar plate 210 , and after assembly, an inlet manifold and an outlet manifold of the reaction water are formed.

[0071] The cooling water inlet and outlet arranged on the cover plate end plate 170 are respectively aligned with the cooling water inlet structure and outlet structure in the bipolar plate 210 in the vertical direction, and after assembly, a cooling water inlet manifold and an outlet manifold are formed.

[0072] The present application provides an embodiment of a high-pressure water electrolysis hydrogen production device, in which a first current collecting plate 130 and a second current collecting plate 150 are respectively connected to the positive and negative electrodes of a DC power supply, and the DC power supply supplies power to the high-pressure water electrolysis hydrogen production device. Reaction water enters the fuel cell stack from the reaction water inlet of the cover plate end plate 170, and enters the anode flow field from the reaction water inlet structure of each bipolar plate 210 through the reaction water manifold. Under the action of the catalyst, oxygen is generated at the anode and hydrogen is generated at the cathode. The oxygen generated by the reaction on the anode side and the unreacted water flow out from the reaction water outlet structure of the anode plate, and flow from the reaction water manifold to the reaction water outlet on the cover plate end plate 170 and flow out of the electrolyzer.

[0073] The hydrogen generated on the cathode side can enter the hydrogen manifold from two hydrogen outlet structures at the same time, and be discharged from the high-pressure water electrolysis hydrogen production device from the hydrogen outlet on the cover plate end plate 170.

[0074] In the high-pressure water electrolysis hydrogen production device, cooling water flows into the high-pressure water electrolyzer from the cooling water inlet of the cover plate end plate 170, enters the cooling water flow field from the cooling water inlet structure of each bipolar plate 210 through the cooling water manifold, enters the cooling water manifold from the cooling water outlet structure, and is discharged from the high-pressure water electrolyzer through the cooling water outlet of the cover plate end plate 170.

[0075] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A high-pressure water electrolysis hydrogen production device, characterized in that: include: An electrolytic cell stack, comprising a plurality of pole plates and membrane electrodes (140) alternately stacked in sequence, titanium felt (240) and carbon paper (250) being respectively arranged on both sides of the membrane electrode (140), and a carbon paper pressing groove (141) being arranged on the side of the pole plate close to the carbon paper (250); A high-voltage clamping structure, which is used to clamp the electrolytic cell stack; A sealing gasket is provided between the electrode plate and the membrane electrode (140), the sealing gasket is in sealing contact with the frame of the membrane electrode (140), the electrode plate is provided with a sealing groove, the sealing gasket is arranged in the sealing groove, and the bottom area of ​​the sealing groove is larger than the area of ​​the sealing gasket; The sealing gaskets on both sides of the membrane electrode (140) are respectively a wide sealing gasket (260) and a narrow sealing gasket (270), and the narrow sealing gasket (270) is within the coverage range of the wide sealing gasket (260); The electrode plate comprises an anode plate and a cathode plate which are bonded to each other, the anode plate is close to the titanium felt (240) side, the cathode plate is close to the carbon paper (250) side, the sealing gasket arranged between the cathode plate and the membrane electrode (140) is a wide sealing gasket (260), and the sealing gasket between the anode plate and the membrane electrode (140) is a narrow sealing gasket (270); The high-voltage clamping structure comprises a plurality of screw rods, a bottom plate end plate (110) and a cover plate end plate (170) respectively arranged on both sides of the electrolytic cell stack, and the screw rods sequentially pass through the bottom plate end plate (110) and the cover plate end plate (170) to clamp the electrolytic cell stack.

2. A high-pressure water electrolysis hydrogen production device according to claim 1, characterized in that: The bottom plate end plate (110) and the cover plate end plate (170) are both provided with a plurality of positioning holes (171), and the electrode plate and the membrane electrode (140) are both provided with a plurality of positioning grooves, and the positioning holes (171) and the positioning grooves are provided in a one-to-one correspondence.

3. A high-pressure water electrolysis hydrogen production device according to claim 1, characterized in that: Insulating plates and current collecting plates are arranged on both sides of the electrolytic cell stack, and the current collecting plates are embedded in the insulating plates.

4. A high-pressure water electrolysis hydrogen production device according to claim 3, characterized in that: The electrode plates include monopolar plates located on both sides of the electrolytic cell stack, and the monopolar plates are arranged on the current collecting plates and the insulating plates.

5. A high-pressure water electrolysis hydrogen production device according to claim 4, characterized in that: A sealing ring is arranged between the monopolar plate and the insulating plate, the monopolar plate is provided with a sealing installation groove, and the sealing ring is arranged in the sealing installation groove.

6. A high-pressure water electrolysis hydrogen production device according to claim 5, characterized in that: The bottom area of ​​the sealing installation groove is larger than the area of ​​the sealing ring.

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