CN115627492A - Electrode plate of electrolysis equipment and electrolysis equipment - Google Patents
Electrode plate of electrolysis equipment and electrolysis equipment Download PDFInfo
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- CN115627492A CN115627492A CN202211646374.1A CN202211646374A CN115627492A CN 115627492 A CN115627492 A CN 115627492A CN 202211646374 A CN202211646374 A CN 202211646374A CN 115627492 A CN115627492 A CN 115627492A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The application relates to an electrode plate of electrolysis equipment and the electrolysis equipment, wherein the electrode plate is provided with an activation region and two distribution regions, the two distribution regions are respectively positioned at two sides of the activation region, one of the two distribution regions is used for distributing electrolyte to the activation region, and the other distribution region is used for collecting the electrolyzed electrolyte; in the activation region, the electrode plate is punched to form a plurality of first protruding parts and second protruding parts which are arranged at intervals, the protruding directions of the first protruding parts and the second protruding parts are opposite, and at least one end face of the electrode plate in the thickness direction is used for being abutted against a diffusion layer or a membrane electrode of the electrolysis equipment, so that a flow channel is formed between the first protruding parts and the diffusion layer or the membrane electrode, and/or a flow channel is formed between the second protruding parts and the diffusion layer or the membrane electrode. The electrode plate can conduct current and can conduct two-phase flow, so that the electrode plate has the functions of electric conduction, two-phase flow conduction and mass transfer, the complexity of electrolysis equipment is reduced, ohmic loss is reduced, and the reaction efficiency is improved.
Description
Technical Field
The application relates to the technical field of electrolysis, in particular to an electrode plate of electrolysis equipment and the electrolysis equipment.
Background
At present, an electrolysis cell in a Proton Exchange Membrane (PEM) pure water electrolysis hydrogen production device needs two metal electrodes as a cathode electrode plate and an anode electrode plate of the electrolysis cell, and two metal grid plates are used as a transmission layer and are stacked with a diffusion layer and a membrane electrode, as shown in fig. 1. The traditional electrode plate 1 is used as a conductive element and provides current guide for hydrogen production of the electrolytic cell, and the frame 2 is provided with a two-phase flow inlet and outlet for providing a transmission channel for two-phase flow reaction; the transmission layer 4 is used as a two-phase flow exchange channel, most transmission layers on the market are in a grid structure, different materials are used in a cathode and an anode, and the essential reason is that the anodic oxygen evolution reaction has too high overpotential, and a metal material with better service performance is needed, for example: titanium, and because of the higher material properties and structural complexity and the higher cost of the formation, the cathode uses a more easily formed, lower cost material, such as: stainless steel to reduce the cost of the whole equipment; the sealing strip 3 is superposed on the frame 2 at the periphery of the transmission layer 4; the diffusion layer 5 serves as a diffusion element and a support element, and provides water distribution necessary for the electrolytic reaction to the membrane electrode. The small cells of the electrolytic cell on the market are all in the structure of a transmission layer 4+ a diffusion layer 5+ a traditional electrode plate 1. The electrode plate 1 of the electrolytic hydrogen production equipment has single function, can only play a role in current conduction, has higher mass transfer resistance, and increases concentration polarization loss in the electrolytic hydrogen production reaction.
Disclosure of Invention
The application provides an electrode plate of electrolysis equipment and electrolysis equipment, can reduce ohmic loss, improves the efficiency of electrolytic reaction.
A first aspect of the embodiments of the present application provides an electrode plate of an electrolysis apparatus, where the electrode plate has an activation region and two distribution regions, where the two distribution regions are located on two sides of the activation region, respectively, one of the two distribution regions is used to distribute an electrolyte to the activation region, and the other is used to collect an electrolyzed electrolyte;
in the activation region, the electrode plate is punched to form a plurality of first protruding parts and second protruding parts which are arranged at intervals, the protruding directions of the first protruding parts and the second protruding parts are opposite, at least one end face of the electrode plate in the thickness direction is used for being abutted to a diffusion layer or a membrane electrode of the electrolysis equipment, so that a flow channel is formed between the first protruding parts and the diffusion layer or the membrane electrode, and/or a flow channel is formed between the second protruding parts and the diffusion layer or the membrane electrode;
the electrode plate is in the distribution region is kept away from one side in the activation region all is provided with the accent, the accent with correspond all be provided with sealed bearing structure between the distribution region.
In one possible design, the first and second raised portions are the same shape and size.
In a possible design, the cross section of the first and second protruding parts is trapezoidal or square or polygonal.
In one possible design, the electrode plate is a rectangular plate having a first diagonal and a second diagonal, the orifices including two first orifices and two second orifices;
the two first cavities are located on the first diagonal line, the two second cavities are located on the second diagonal line, the two first cavities are rotationally symmetric about the center of the electrode plate, and the two second cavities are rotationally symmetric about the center of the electrode plate.
In one possible design, the seal support structure includes a first seal support structure and a second seal support structure, the electrode plate includes an a-face and a B-face along a thickness direction, the first seal support structure is disposed on the a-face of the electrode plate, and the second seal support structure is disposed on the B-face of the electrode plate;
the first sealing support structures are arranged between the first cavities and the corresponding distribution areas, the second sealing support structures are arranged between the second cavities and the corresponding distribution areas, the two first sealing support structures are rotationally symmetrical relative to the center of the electrode plate, and the two second sealing support structures are rotationally symmetrical relative to the center of the electrode plate.
In one possible design, the first seal support structure and the second seal support structure are injection molded to the surface of the electrode plate.
In one possible design, each of the first and second sealing support structures includes a plurality of spaced apart bumps, and a channel for electrolyte to enter and exit is formed between adjacent bumps.
In one possible design, the distribution regions include a first distribution region and a second distribution region, the first distribution region is between the first orifice and the activation region, the second distribution region is between the second orifice and the activation region, and two of the first distribution regions are rotationally symmetric about a center of the electrode plate and two of the second distribution regions are rotationally symmetric about the center of the electrode plate.
In a possible design, in the distribution region, the electrode plate is stamped to form a plurality of third protrusions and fourth protrusions arranged at intervals, the third protrusions are opposite to the fourth protrusions in protruding direction, the third protrusions are used for being abutted with the diffusion layer or the membrane electrode adjacent to the electrode plate, and the fourth protrusions are used for being abutted with another diffusion layer or membrane electrode adjacent to the electrode plate.
In one possible design, the side wall of the cavity is provided with a cavity supporting structure on the A surface and the B surface of the electrode plate;
the chamber port supporting structure comprises a plurality of punch forming and fifth and sixth protruding parts which are arranged at intervals, the protruding directions of the fifth and sixth protruding parts are opposite, and the fifth and sixth protruding parts are used for being abutted to the frame of the membrane electrode.
In a possible design, the edge of electrode board is provided with additional strengthening, additional strengthening includes the seventh bellying and the eighth bellying of a plurality of stamping forming and interval settings, the seventh bellying with the protruding opposite direction of eighth bellying, the seventh bellying with the eighth bellying is used for the frame butt with membrane electrode.
In one possible design, the electrode plate is also provided with a mistake-proofing hole.
In one possible design, the electrode plates are provided with guide holes.
In one possible design, the electrode plate is provided with two plug sockets which are rotationally symmetric about the center of the electrode plate and which are used for real-time monitoring of the voltage of the electrolysis installation.
A second aspect of the embodiments of the present application provides an electrolytic apparatus, including a body, and an electrode plate, a membrane electrode, or a diffusion layer installed in the body, where the electrode plate is the above-mentioned electrode plate;
the adjacent electrode plates are connected, the first protruding parts of the electrode plates are abutted with the membrane electrodes or the diffusion layers adjacent to the electrode plates, so that flow channels are formed between the first protruding parts and the membrane electrodes or the diffusion layers, and/or the second protruding parts of the electrode plates are abutted with the membrane electrodes or the diffusion layers adjacent to the electrode plates, so that flow channels are formed between the second protruding parts and the membrane electrodes or the diffusion layers.
In one possible design, the flow passages are twist-shaped and are periodically distributed.
In one possible design, the first projection has a first end face facing the electrode plate adjacent thereto, the second projection has a second end face facing the electrode plate adjacent thereto, and at least a part of the first end face abuts against the second end face through the membrane electrode or the diffusion layer.
In this embodiment, the electrode plates in the activation region of the electrode plate have protrusions on both the front and back surfaces, so that grooves are formed on both the front and back surfaces of the electrode plate, after the two electrode plates are assembled, the electrode plates are communicated with the grooves between the diffusion layer or the membrane electrode to form a two-phase flow mass transfer channel, and the flow channel ridge of the flow channel is in contact with the diffusion layer or the membrane electrode to support the diffusion layer or the membrane electrode, and two-phase flow mass transfer is performed in the grooves. Therefore, the electrode plate in the embodiment can conduct current and can also conduct two-phase flow, namely the electrode plate can also be used as a transmission layer, so that the electrode plate has the functions of electric conduction, two-phase flow conduction and mass transfer, the complexity of electrolytic cell equipment is structurally reduced, ohmic loss is reduced, and the reaction efficiency is improved; the assembly components of the electrolysis equipment are reduced, and the volume and the mass of the Proton Exchange Membrane (PEM) pure water electrolysis hydrogen production equipment are reduced.
In addition, the electrode plates in the embodiment of the application can be used as a cathode and can also be used as an anode, when the electrolytic equipment is assembled, the two electrode plates with the same structure are assembled together, one of the two electrode plates rotates 180 degrees in a plane, so that when the two adjacent electrode plates are mutually abutted through the diffusion layer or the membrane electrode through the first protruding part and the second protruding part, the two adjacent electrode plates can be mutually supported, and the reliability of the matching of the two adjacent electrode plates is improved. Therefore, the electrode plate in the embodiment of the application has high universality, only the electrode plate needs to be produced, then the two electrode plates are assembled together to form the electrolytic chamber, and the electrolytic chamber with a complex structure does not need to be produced, so that the cost of electrolytic equipment is reduced, and the mass production can be realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a schematic view showing the construction of an electrolysis cell of an electrolysis apparatus according to the prior art;
FIG. 2 is a front view of an electrode plate provided herein in one embodiment;
FIG. 3 is a rear view of an electrode plate provided herein in one embodiment;
FIG. 4 is a front view of an assembled two electrode plates of the electrolysis apparatus provided herein;
FIG. 5 is a partial enlarged view of portion I of FIG. 4;
FIG. 6 isbase:Sub>A sectional view taken along line A-A of FIG. 5;
FIG. 7 is a sectional view taken along line B-B of FIG. 5;
FIG. 8 is an enlarged view of a portion II of FIG. 4;
FIG. 9 is a cross-sectional view taken along line C-C of FIG. 8;
FIG. 10 is an enlarged view of a portion III of FIG. 4;
fig. 11 is a sectional view taken along line D-D of fig. 10.
Reference numerals:
1-an electrode plate;
2-a frame;
3-sealing strips;
4-a conductive layer;
5-a diffusion layer;
6-an activation region;
7-a flow channel;
71-a first boss;
711 — first end face;
72-a second boss;
721-a second end face;
81-a first distribution area;
82-a second distribution area;
9-distributed convex-concave microstructure;
91-a third boss;
92-a fourth boss;
10-a first seal support structure;
11-a second seal support structure;
12-a first orifice support structure;
13-a second port support structure;
131-a fifth boss;
132-a sixth boss;
14-a reinforcing structure;
15-error proofing holes;
16-a pilot hole;
17-a socket;
18-a first orifice;
19-second orifice.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
In order to better understand the technical solution of the present application, the following detailed description is made with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely a relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element through intervening elements.
An embodiment of the present application provides an electrode plate of an electrolysis apparatus, as shown in fig. 2 and 3, where fig. 2 is a front view of the electrode plate, fig. 3 is a back view of the electrode plate, that is, fig. 2 shows a-side structure of the electrode plate, fig. 3 shows a B-side structure of the electrode plate, and in fig. 2 and 3, the right side is a hydrogen side of the electrode plate, and the left side is an oxygen side of the electrode plate. Fig. 4 is a schematic structural diagram of two electrode plates after being matched. As shown in fig. 2 and fig. 3, the electrode plate has an activation region 6 and a distribution region 8, the activation region 6 is used as a reaction region in a hydrogen production process by water electrolysis through a Proton Exchange Membrane (PEM), the two distribution regions 8 are respectively located at two sides of the activation region 6, one of the two distribution regions 8 is used for distributing electrolyte to the activation region 6, and the other is used for collecting the electrolyzed electrolyte.
As shown in fig. 6, in the activation region 6, the electrode plate is provided with a plurality of first protrusions 71 and second protrusions 72 arranged at intervals, the first protrusions 71 and the second protrusions 72 protrude in the opposite direction, and the first protrusions 71 and the second protrusions 72 are formed by punching on the electrode plate. The first protruding part 71 of the electrode plate is used for abutting against a diffusion layer or a membrane electrode adjacent to the electrode plate, the second protruding part 72 is used for abutting against another diffusion layer or a membrane electrode adjacent to the electrode plate, the diffusion layers or the membrane electrodes abutting against the first protruding part 71 and the second protruding part 72 are located on two sides of the electrode plate in the thickness direction, and a flow channel 7 for electrolyte circulation is formed between the first protruding part 71 and the diffusion layer or the membrane electrode and between the second protruding part 72 and the diffusion layers or the membrane electrodes.
In this embodiment, the electrode plates in the activation region 6 of the electrode plate have protrusions on both the front and back surfaces, so that grooves are formed on both the front and back surfaces of the electrode plate, after the two electrode plates are assembled, the electrode plates are communicated with the grooves between the diffusion layers or the membrane electrodes to form a two-phase flow mass transfer channel, and the flow channel ridge of the flow channel 7 is in contact with the diffusion layers or the membrane electrodes to support the diffusion layers or the membrane electrodes, and the two-phase flow mass transfer is performed in the grooves. Therefore, the electrode plate in the embodiment can conduct current and can also conduct two-phase flow, namely the electrode plate can also be used as a transmission layer, so that the electrode plate has the functions of electric conduction, two-phase flow conduction and mass transfer, the complexity of electrolytic cell equipment is structurally reduced, ohmic loss is reduced, and the reaction efficiency is improved; the assembly components of the electrolysis equipment are reduced, and the volume and the mass of the Proton Exchange Membrane (PEM) pure water electrolysis hydrogen production equipment are reduced.
In addition, the electrode plate in the embodiment of the application can be used as a cathode or an anode, when the electrolytic equipment is assembled, two electrode plates with the same structure are assembled together, wherein one electrode plate rotates 180 degrees in the plane, so that when two adjacent electrode plates are mutually abutted through the diffusion layer or the membrane electrode through the first protruding part 71 and the second protruding part 72, the two adjacent electrode plates can be mutually supported, and the reliability of the matching of the two adjacent electrode plates is improved. Therefore, the electrode plate in the embodiment of the application has high universality, only the electrode plate needs to be produced, then the two electrode plates are assembled together to form the electrolytic chamber, and the electrolytic chamber with a complex structure does not need to be produced, so that the cost of electrolytic equipment is reduced, and the mass production can be realized. As shown in fig. 6 and 7, the cross sections of the first protruding portion 71 and the second protruding portion 72 may be in various shapes such as a trapezoid, a square, a polygon, and an irregular shape, as long as the flow channel can be formed after the adjacent electrode plates are assembled. In addition, the two adjacent electrode plates can be assembled in various modes such as bolt connection, clamping connection and welding.
In addition, the electrode plate is subjected to punch forming, namely the first protruding part 71 and the second protruding part 72 are subjected to punch forming, the traditional milling, sintering and weaving processes are changed, the electrode plate has the advantage of simple processing process, and the cost of electrolysis equipment is effectively reduced.
In a specific embodiment, the first protruding portion 71 and the second protruding portion 72 have the same shape and size, that is, the first protruding portion 71 and the second protruding portion 72 have the same structure except that the protruding direction is opposite, so as to simplify the die for stamping and forming and further reduce the cost of the electrolysis device. In addition, the first and second protrusions 71 and 72 have the same shape and size, so that the versatility of the electrode plate is high.
A part of the first end face 711 of the first projecting portion 71 and a part of the second end face 721 of the second projecting portion 72 abut against each other through a membrane electrode or a diffusion layer, which results in the embodiment shown in fig. 6, that is, the area where the first end face 711 and the second end face 721 abut against each other (abut against each other through a membrane electrode or a diffusion layer) is small, and the mass transfer flow channel 7 can be formed therebetween. In the embodiment shown in fig. 7, the first end face 711 of the first protruding portion 71 and the second end face 721 of the second protruding portion 72 having the same size are completely abutted (via the membrane electrode or the diffusion layer), so as to form the embodiment shown in fig. 7, in this case, the mass transfer channel 7 can be formed by two adjacent electrode plates, and the area where the first end face 711 and the second end face 721 are abutted to each other is large, so that the reliability of mutual support of the two electrode plates can be improved.
In one embodiment, the flow passages 7 are twisted and periodically distributed.
In the above embodiments, the electrode plate is provided with four openings at one side of the distribution region away from the activation region 6, as shown in fig. 2 and 3, the electrode plate is provided with four openings, the four openings include two first openings 18 and two second openings 19, the two first openings 18 are hydrogen or water openings, the two second openings 19 are oxygen or water openings, the electrode plate is in a rectangular structure and has a first diagonal and a second diagonal, as shown in fig. 2 and 3, the two first openings 18 are located at the first diagonal of the electrode plate, the two second openings 19 are located at the second diagonal of the electrode plate, the two first openings 18 are rotationally symmetric about the center of the electrode plate, and the two second openings 19 are rotationally symmetric about the center of the electrode plate. When two electrode plates with the same structure are assembled, one electrode plate rotates 180 degrees, so that the first cavities 18 of the two electrode plates are overlapped to form an inlet and an outlet for hydrogen or water, and the second cavities 19 of the two electrode plates are overlapped to form an inlet and an outlet for oxygen or water.
Thus, in this embodiment, the first and second apertures 18, 19, which are rotationally symmetric about the center of the electrode plate, also enable the electrode plate to be used as a cathode and an anode, and can be assembled with another electrode plate by simply rotating the electrode plate.
Based on this, the distribution areas in the embodiment of the present application include a first distribution area 81 and a second distribution area 82, the first distribution area 81 is provided between the first orifice 18 and the activation area, the second distribution area 82 is provided between the second orifice 19 and the activation area, two first distribution areas 81 are rotationally symmetric with respect to the center of the electrode plate, and two second distribution areas 82 are rotationally symmetric with respect to the center of the electrode plate. When two electrode plates with the same structure are assembled, one of the electrode plates is rotated by 180 degrees, so that the first distribution areas 81 of the two electrode plates are overlapped, and the second distribution areas 82 of the two electrode plates are overlapped.
In the embodiment of the present application, the electrode plate further includes a first seal support structure 10 and a second seal support structure 11, as shown in fig. 2, the first seal support structure 10 is disposed on the a-face of the electrode plate and located between the first cavity opening 18 and the first distribution region 81, and therefore, the electrode plate is provided with two first seal support structures 10, and the two first seal support structures 10 are rotationally symmetric about the center of the electrode plate. As shown in fig. 3, the second seal support structure 11 is disposed on the B-plane of the electrode plate between the second cavity 19 and the second distribution region 82, and thus, the electrode plate is provided with two second seal support structures 11, and the two second seal support structures 11 are rotationally symmetric about the center of the electrode plate.
In the present embodiment, as shown in fig. 4, the first seal support structure 10 and the second seal support structure 11, which are rotationally symmetrically disposed about the center of the electrode plate, also enable the electrode plate to serve as a cathode and an anode, and during the assembly process, the electrode plate can be assembled with another electrode plate by only rotating the electrode plate.
Wherein, the first sealing support structure 10 and the second sealing support structure 11 are injection molded on the surface of the electrode plate, so that the sealing support structures of the a surface and the B surface of the electrode plate can be different (i.e. the positions of the first sealing support structure 10 and the second sealing support structure 11 on the electrode plate are different), so as to enable the electrode plate to be used as a cathode plate or an anode plate.
Specifically, each of the first sealing support structure 10 and the second sealing support structure 11 includes a plurality of bumps arranged at intervals, and a passage for passing an electrolyte is formed between adjacent bumps.
The first sealing support structure 10 facilitates the conduction of the surface a (cathode surface) of the electrode plate, the surface B (anode surface) of the other electrode plate after assembly is sealed, so that the cathode surface of the electrode plate is provided with a hydrogen and water two-phase flow mass transfer channel and facilitates the sealing of a hydrogen or water cavity opening (first cavity opening) in the anode surface of the electrode plate, and the first sealing support structure 10 supports the two-phase flow mass transfer channel of hydrogen and water on the cathode side due to the periodic convex characteristic. The second sealing support structure 11 facilitates the conduction of the surface B (anode surface) of the electrode plate, and the surface a (cathode surface) of the other electrode plate after assembly is sealed and used for the sealing support of the oxygen or water cavity (second cavity), so that the surface of the anode of the electrode plate has a mass transfer channel of two-phase flow of oxygen and water, and facilitates the sealing of the oxygen or water cavity in the cathode surface of the electrode plate.
In the above embodiments, as shown in fig. 8 and 9, a plurality of distributed microstructure 9 is provided in the distribution region, where the distributed microstructure 9 includes third protrusions 91 and fourth protrusions 92, the third protrusions 91 protrude in the opposite direction to the fourth protrusions 92, and the third protrusions 91 are configured to abut against the fourth protrusions 92 of another electrode plate adjacent to the electrode plate. When two adjacent electrode plates are assembled, one of the electrode plates rotates 180 degrees in the plane, so that the third bulge 91 of the electrode plate is abutted with the diffusion layer or the membrane electrode adjacent to the electrode plate, the fourth bulge 92 is abutted with the diffusion layer or the membrane electrode adjacent to the electrode plate on the other side, and the diffusion layer or the membrane electrode is supported. That is, the distribution region of the electrode plate serves as a region where the two-phase flow is uniformly distributed and confluent out in the region of the electrode plate, and the distributed convex-concave microstructure 9 in the distribution region is used to improve the speed uniformity of the two-phase flow distribution.
The third protruding portion 91 and the fourth protruding portion 92 may have the same shape and size and protruding directions opposite to each other. For example, the third and fourth convex portions 91 and 92 may have a trapezoidal shape, a square shape, a polygonal shape, an irregular shape, or the like.
On the other hand, as shown in fig. 2 and 3, the sidewall of the port is provided with a port support structure on both the cathode side and the anode side, the port support structure includes a first port support structure 12 and a second port support structure 13, wherein the first port support structure 12 is a hydrogen or water port reinforcement support structure, and the second port support structure 13 is an oxygen or water port reinforcement support structure. The first port support structure 12 is disposed on the sidewall of the first port 18, the second port support structure 13 is disposed on the sidewall of the second port 19, and the first port support structure 12 and the second port support structure 13 are disposed on the surfaces a and B of the electrode plate.
The two cavity opening supporting structures comprise a plurality of fifth bulges 131 and sixth bulges 132 which are arranged at intervals, the protruding directions of the fifth bulges 131 and the sixth bulges 132 are opposite, the fifth bulges 131 are used for abutting with the sixth bulges 132 of the other electrode plate adjacent to the electrode plate, or the fifth bulges 131 are used for abutting with the membrane electrode adjacent to the electrode plate, and the sixth bulges 132 are used for abutting with the membrane electrode on the other side adjacent to the electrode plate.
When the two electrode plates are assembled, the first cavity port 18 is not collapsed to enable the first cavity port to input or output gas or liquid through mutual support of the fifth protruding part 131 and the sixth protruding part 132 of the first cavity port support structure 12 or mutual support of the fifth protruding part 131 and the sixth protruding part 132 through the membrane electrode; by the mutual support of the fifth protruding portion 131 and the sixth protruding portion 132 of the second chamber supporting structure 13, or the mutual support of the fifth protruding portion 131 and the sixth protruding portion 132 through the membrane electrode, it is ensured that the second chamber 19 is not collapsed and cannot input or output gas or liquid.
The fifth convex portion 131 and the sixth convex portion 132 may have the same shape and size and opposite convex directions. For example, the fifth and sixth protrusions 131 and 132 may be trapezoidal, square, polygonal, irregular, and the like.
In the above embodiments, as shown in fig. 2, the edge of the electrode plate is provided with the reinforcing structure 14, the reinforcing structure 14 is disposed in the outside area of the electrode plate sealing strip, and includes a plurality of seventh protruding portions and eighth protruding portions (not shown in the figure) disposed at intervals, the protruding direction of the seventh protruding portion is opposite to that of the eighth protruding portion, the seventh protruding portion is used for abutting against the eighth protruding portion of another electrode plate adjacent to the electrode plate, or the seventh protruding portion abuts against the eighth protruding portion of another electrode plate through the frame of the membrane electrode. When two adjacent electrode plates are assembled, one of the electrode plates rotates 180 degrees in the plane, so that the seventh protruding part of the electrode plate and the eighth protruding part of the other electrode plate can be abutted through the membrane electrode or directly abutted, and the seventh protruding part and the eighth protruding part have mutual supporting effect when abutted.
The seventh convex part and the eighth convex part can be in the same shape and size and have opposite convex directions. For example, the seventh and eighth bosses may be trapezoidal, square, polygonal, irregular, etc.
In the embodiment of the present application, when two electrode plates are assembled, the mutually supported first protrusion 71 and second protrusion 72, the mutually supported third protrusion 91 and fourth protrusion (a distributed convex-concave microstructure formed by the two), the mutually supported concave-convex structure in the first sealing support structure 10 and the second sealing support structure 11, the mutually supported fifth protrusion 131 and sixth protrusion 132 in the first cavity opening support structure 12 and the second cavity opening support structure 13, and the mutually supported seventh protrusion and eighth protrusion in the reinforcing structure 14 can improve the strength of the activation region 6, the distribution region, the cavity opening region, and the frame region of the electrode plate, so that the electrode plates can maintain good strength when being formed by stamping.
In the above embodiments, as shown in fig. 2, the electrode plates are further provided with a mistake-proofing hole 15 and a guide hole 16, and the mistake-proofing hole 15 is used for checking the assembling direction when two electrode plates are assembled to prevent the assembling direction. The guide hole 16 is used for positioning and guiding when the two electrode plates are assembled.
In the embodiment shown in fig. 2, the electrode plate includes 1 error-proof hole 15, and the error-proof hole 15 is located at the edge of the electrode plate; the electrode plate includes 4 guiding holes 16, and four guiding holes 16 are respectively located at four corners of the electrode plate.
In the above embodiments, as shown in fig. 2, the electrode plate is provided with two plug sockets 17 which are rotationally symmetric about the center of the electrode plate, and the plug sockets 17 can be connected with an external monitoring device, so as to be used for real-time monitoring of the voltage of the electrolysis device.
When the electrolysis equipment provided by the embodiment of the application is used for preparing hydrogen by electrolyzing pure water through a Proton Exchange Membrane (PEM), the working process is as follows: in the electrolytic hydrogen production cell of the electrolysis apparatus, deionized water enters the second distribution region 82 through the interstitial mass transfer channels of the second sealing support structure 11, and is distributed to the activated region 6 through the distributed convex-concave microstructures 9 in the second distribution region 82; deionized water is supplemented to the contact surface of the diffusion layer and the catalyst of the membrane electrode from the activation region 6 for electrolytic reaction, and oxygen generated by the reaction on the surface of the anode side of the membrane electrode passes through the diffusion layer and is taken out by flowing water in a flow channel 7 of the activation region 6; in the flow channel 7 in the activation region 6, the oxygen gas and the deionized water diffused therein by the anode-side diffusion layer are jointly mass-transferred, collected by the other second distribution region 82, and discharged from the gap of the second sealing support structure 11 on the anode surface (B-surface) of the electrode plate and discharged through the second chamber port 19. Water and hydrogen ions are combined with electrons on the other side of the membrane electrode through a proton exchange membrane to generate hydrogen, the hydrogen passes through a diffusion layer, passes through a flow channel 7 in an activation region 6 on the cathode surface (A surface) of the other electrode plate after rotating 180 degrees in the other surface, and is jointly transferred to a first distribution region 81 with deionized water transferred from the anode side to the cathode side due to other phenomena, and is output to a hydrogen storage module through a first sealing support structure 10 on the cathode surface (A surface) of the electrode plate.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (17)
1. An electrode plate of an electrolysis device, which is characterized by comprising an activation region and two distribution regions, wherein the two distribution regions are respectively positioned at two sides of the activation region, one of the two distribution regions is used for distributing electrolyte to the activation region, and the other distribution region is used for collecting the electrolyzed electrolyte;
in the activation region, the electrode plate is punched to form a plurality of first protruding parts and second protruding parts which are arranged at intervals, the protruding directions of the first protruding parts and the second protruding parts are opposite, at least one end face of the electrode plate in the thickness direction is used for being abutted to a diffusion layer or a membrane electrode of the electrolysis equipment, so that a flow channel is formed between the first protruding parts and the diffusion layer or the membrane electrode, and/or a flow channel is formed between the second protruding parts and the diffusion layer or the membrane electrode;
the electrode plate is in the distribution region is kept away from one side in the activation region all is provided with the accent, the accent with correspond all be provided with sealed bearing structure between the distribution region.
2. The electrode plate of the electrolysis apparatus according to claim 1, wherein the first and second protrusions have the same shape and size.
3. The electrode plate of an electrolytic apparatus according to claim 1, wherein the first and second protrusions have a trapezoidal or square or polygonal cross section.
4. The electrode plate of an electrolysis apparatus according to claim 1, wherein the electrode plate is a rectangular plate having a first diagonal and a second diagonal, the orifices comprising two first orifices and two second orifices;
the two first cavities are located on the first diagonal line, the two second cavities are located on the second diagonal line, the two first cavities are rotationally symmetrical about the center of the electrode plate, and the two second cavities are rotationally symmetrical about the center of the electrode plate.
5. The electrode plate of an electrolysis apparatus according to claim 4, wherein the seal support structure comprises a first seal support structure and a second seal support structure, the electrode plate comprises an A face and a B face in a thickness direction, the first seal support structure is disposed on the A face of the electrode plate, and the second seal support structure is disposed on the B face of the electrode plate;
the first sealing support structures are arranged between the first cavities and the corresponding distribution areas, the second sealing support structures are arranged between the second cavities and the corresponding distribution areas, the two first sealing support structures are rotationally symmetrical relative to the center of the electrode plate, and the two second sealing support structures are rotationally symmetrical relative to the center of the electrode plate.
6. The electrode plate of an electrolysis apparatus according to claim 5, wherein the first seal support structure and the second seal support structure are injection molded to the surface of the electrode plate.
7. The electrode plate of the electrolysis device according to claim 5, wherein the first sealing support structure and the second sealing support structure each comprise a plurality of spaced apart projections, and a passage for the ingress and egress of the electrolyte is formed between adjacent projections.
8. The electrode plate of the electrolysis apparatus according to claim 4, wherein the distribution region includes a first distribution region and a second distribution region, the first distribution region is between the first orifice and the activated region, the second distribution region is between the second orifice and the activated region, and two of the first distribution regions are rotationally symmetric about a center of the electrode plate and two of the second distribution regions are rotationally symmetric about the center of the electrode plate.
9. The electrode plate of the electrolytic apparatus as recited in any one of claims 1 to 8, wherein, in the distribution region, the electrode plate is stamped and formed with a plurality of third projections and fourth projections arranged at intervals, the third projections being in a direction opposite to a projecting direction of the fourth projections, the third projections being for abutment with the diffusion layer or the membrane electrode adjacent to the electrode plate, and the fourth projections being for abutment with another diffusion layer or the membrane electrode adjacent to the electrode plate.
10. The electrode plate of an electrolysis apparatus according to any one of claims 1 to 7, wherein the side wall of the orifice is provided with an orifice supporting structure on both the A-side and the B-side of the electrode plate;
the chamber opening supporting structure comprises a plurality of fifth bosses and sixth bosses which are formed in a stamping mode and are arranged at intervals, the protruding directions of the fifth bosses and the sixth bosses are opposite, and the fifth bosses and the sixth bosses are used for being abutted to the frame of the membrane electrode.
11. The electrode plate of any one of claims 1 to 7, wherein the edge of the electrode plate is provided with a reinforcing structure, the reinforcing structure comprises a plurality of stamped and formed seventh protruding parts and eighth protruding parts which are arranged at intervals, the protruding direction of the seventh protruding parts is opposite to that of the eighth protruding parts, and the seventh protruding parts and the eighth protruding parts are used for abutting against a frame of a membrane electrode.
12. Electrode plate of an electrolysis installation according to any of claims 1-7, wherein the electrode plate is further provided with error-proof holes.
13. The electrode plate of an electrolytic apparatus according to any one of claims 1 to 7, characterized in that the electrode plate is provided with pilot holes.
14. Electrode plate of an electrolysis installation according to any one of claims 1-7, wherein the electrode plate is provided with two patch sockets rotationally symmetric about the center of the electrode plate, the patch sockets being used for real-time monitoring of the voltage of the electrolysis installation.
15. An electrolytic device characterized by comprising a body and two electrode plates, a membrane electrode or a diffusion layer, mounted in the body, the a-side of one of the electrode plates being opposite to the B-side of the other of the electrode plates, the electrode plates being as defined in any one of claims 1 to 14;
the adjacent electrode plates are connected, the first protruding parts of the electrode plates are abutted with the membrane electrodes or the diffusion layers adjacent to the electrode plates, so that flow channels are formed between the first protruding parts and the membrane electrodes or the diffusion layers, and/or the second protruding parts of the electrode plates are abutted with the membrane electrodes or the diffusion layers adjacent to the electrode plates, so that flow channels are formed between the second protruding parts and the membrane electrodes or the diffusion layers.
16. The electrolysis apparatus according to claim 15, wherein the flow channels are twisted and periodically distributed.
17. The electrolytic apparatus according to claim 15, wherein the first projection has a first end face facing the electrode plate adjacent thereto, the second projection has a second end face facing the electrode plate adjacent thereto, and at least a portion of the first end face abuts against the second end face through the membrane electrode or diffusion layer.
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| CN202211646374.1A CN115627492B (en) | 2022-12-21 | 2022-12-21 | Electrode plate of electrolysis equipment and electrolysis equipment |
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| CN115627492B (en) | 2023-05-09 |
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