CN220724364U - PEM electrolyzes water with two polar plate subassemblies of integration - Google Patents
PEM electrolyzes water with two polar plate subassemblies of integration Download PDFInfo
- Publication number
- CN220724364U CN220724364U CN202321916818.9U CN202321916818U CN220724364U CN 220724364 U CN220724364 U CN 220724364U CN 202321916818 U CN202321916818 U CN 202321916818U CN 220724364 U CN220724364 U CN 220724364U
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- China
- Prior art keywords
- bipolar plate
- anode
- diffusion layer
- gas diffusion
- pem
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 230000010354 integration Effects 0.000 title description 2
- 229910052751 metal Inorganic materials 0.000 claims abstract description 85
- 239000002184 metal Substances 0.000 claims abstract description 85
- 238000009792 diffusion process Methods 0.000 claims abstract description 64
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 18
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 3
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 3
- 239000011148 porous material Substances 0.000 claims description 11
- 230000003064 anti-oxidating effect Effects 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229910000510 noble metal Inorganic materials 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 49
- 238000005868 electrolysis reaction Methods 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses an integrated bipolar plate assembly for PEM electrolytic water, which comprises a bipolar plate and an anode gas diffusion layer arranged on the anode side of the bipolar plate; an anode metal net is arranged between the bipolar plate and the anode gas diffusion layer; the bipolar plate, the anode gas diffusion layer and the anode metal net are welded and sealed at the edge position along the circumferential direction to form an integrated structure; and an antioxidant metal coating is arranged on the surface of the integrated structure, which is opposite to the bipolar plate. The bipolar plate, the anode metal net and the anode gas diffusion layer are formed into an integrated structure in a welding mode, so that the assembly efficiency of the electrolytic tank is effectively improved, the surface area of noble metal coating treatment is reduced, and the manufacturing cost of the electrolytic tank is effectively saved.
Description
Technical Field
The utility model relates to the technical field of hydrogen production by water electrolysis, in particular to an integrated bipolar plate assembly for PEM water electrolysis.
Background
In the core structure of the electrolysis cell of the PEM electrolysis water tank, as shown in fig. 1, a bipolar plate 1, an anode gas diffusion layer 2, a CCM (comprising an anode catalyst 42, a proton exchange membrane 41 and a cathode catalyst 43), a cathode gas diffusion layer 3 and the bipolar plate 1 are sequentially arranged. In the existing PEM electrolyzer, a three-dimensional porous metal mesh structure is added between the bipolar plate 1 and the gas diffusion layer in order to further improve mass transfer efficiency. The parts are relatively independent, the formed structure is complex, on one hand, the assembly of the electrolytic tank is difficult, and the overall assembly efficiency is reduced. On the other hand, the passivation oxidation of the related structure in the anode environment of the electrolytic cell causes the increase of contact resistance, so that the energy conversion efficiency of the electrolytic cell is reduced, and in order to prevent the increase of contact resistance, the bipolar plate 1, the metal mesh structure and the anode gas diffusion layer 2 are required to be subjected to surface noble metal coating treatment so as to delay the passivation oxidation of the related component in the anode environment of the electrolytic cell, so that the surface area of the noble metal coating treatment is increased, and the manufacturing cost of the electrolytic cell is further increased.
Disclosure of Invention
Aiming at the technical problems, the utility model aims at: the integrated bipolar plate assembly for PEM electrolytic water is provided, the bipolar plate, the anode metal net and the anode gas diffusion layer are formed into an integrated structure in a welding mode, so that the assembly efficiency of the electrolytic tank is effectively improved, the surface area treated by a noble metal coating is reduced, and the manufacturing cost of the electrolytic tank is effectively saved.
The technical solution of the utility model is realized as follows: an integrated bipolar plate assembly for PEM electrolyzed water comprises a bipolar plate and an anode gas diffusion layer arranged on the anode side of the bipolar plate;
an anode metal net is arranged between the bipolar plate and the anode gas diffusion layer;
the bipolar plate, the anode gas diffusion layer and the anode metal net are welded and sealed at the edge position along the circumferential direction to form an integrated structure; and an antioxidant metal coating is arranged on the surface of the integrated structure, which is opposite to the bipolar plate.
Further, the side surface of the anode side of the bipolar plate, the anode metal mesh and the anode gas diffusion layer are provided with mass transfer areas and the edge positions formed around the outer sides of the mass transfer areas; the edge positions of the anode metal mesh and the bipolar plate are welded with each other, and the edge positions of the anode gas diffusion layer and the anode metal mesh are welded with each other; alternatively, the edge positions of the anode metal mesh and the bipolar plate are welded to each other, and the edge positions of the anode gas diffusion layer and the bipolar plate are welded to each other.
Further, the antioxidation metal coating is a titanium metal coating.
Further, the welding mode for forming the integral structure is ultrasonic welding or laser welding.
Further, a circle of metal sheet structures are arranged around the anode metal net; the edge position of the anode metal mesh is formed on the metal sheet structure, and the mass transfer region is formed on the anode metal mesh.
Further, the pore size of the anode metal mesh is larger than that of the anode gas diffusion layer.
Further, the integrated bipolar plate assembly comprises a cathode gas diffusion layer arranged on the cathode side of the bipolar plate and a cathode metal mesh arranged between the bipolar plate and the cathode gas diffusion layer; the bipolar plate, the cathode gas diffusion layer and the cathode metal net are welded and sealed at the edge along the circumferential direction to form an integral structure.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. in the utility model, the bipolar plate, the anode metal net and the anode gas diffusion layer form an integrated structure in a welding mode, and the integrated structure is integrally assembled, so that the assembly efficiency of the electrolytic tank can be effectively improved. In the integrated structure, only one surface of the integrated structure can be subjected to antioxidation metal coating treatment so as to delay passivation and oxidization of the integrated structure in the anode environment of the electrolytic cell, the surface area of the antioxidation metal coating treatment can be effectively reduced, and the manufacturing cost of the electrolytic cell is saved.
2. In the utility model, the pore diameter of the anode metal net and the pore diameter of the anode gas diffusion layer are mutually matched to form a gradient pore diameter, and a gradient diffusion channel is formed between the anode metal net and the anode gas diffusion layer, so that the gas-liquid mass transfer is effectively promoted, and the energy consumption of hydrogen production by water electrolysis is reduced.
Drawings
The technical scheme of the utility model is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a prior art electrolytic cell construction of a PEM electrolysis cell;
FIG. 2 is a schematic structural view of an integrated structure according to a first embodiment of the present utility model;
fig. 3 is a schematic structural diagram of an integrated structure of a second embodiment of the present utility model;
FIG. 4 is a schematic plan view of a bipolar plate, anode metal mesh, anode gas diffusion layer;
wherein: 1. a bipolar plate; 2. an anode gas diffusion layer; 3. a cathode gas diffusion layer; 4. CCM; 41. a proton exchange membrane; 42. an anode catalyst; 43. a cathode catalyst; 5. an integral structure; 6. an anode metal mesh; 7. a cathode metal mesh; 81. a mass transfer region; 82. edge position.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
Embodiment 1,
An integrated bipolar plate 1 assembly for PEM electrolyzed water according to the present embodiment is shown in fig. 2-4, the integrated bipolar plate 1 assembly being the relevant components in the electrolysis cells of the electrolysis basin, installed in the electrolysis basin to enable hydrogen production operations. The integrated bipolar plate 1 assembly comprises a bipolar plate 1, an anode gas diffusion layer 2 mounted on the anode side of the bipolar plate 1. The bipolar plate 1 and the anode gas diffusion layer 2 described above are conventional components of the prior art. The bipolar plate 1 may be a stainless steel plate or a titanium plate, and the anode gas diffusion layer 2 may be a metal porous material, a metal mesh or a metal powder sintered and formed structure. An anode metal mesh 6 is arranged between the bipolar plate 1 and the anode gas diffusion layer 2. The anode wire 6 has a mesh, which may be a stainless steel mesh or a titanium wire.
Specifically, the bipolar plate 1, the anode gas diffusion layer 2 and the anode metal mesh 6 are stacked on each other, and are welded and sealed at the edge 82 along the circumferential direction to form an integral structure 5. The surface of the integral structure 5 facing away from the bipolar plate 1 is sprayed with an oxidation-resistant metal coating. The antioxidation metal coating is a noble metal coating and can be a titanium metal coating or a platinum metal coating. In the anode environment of the electrolytic cell. The antioxidation metal coating plays a role in antioxidation.
Specifically, the side surface of the anode side of the bipolar plate 1, the anode metal mesh 6, and the anode gas diffusion layer 2 each have a mass transfer region 81 and the aforementioned edge position 82 formed around the outside of the mass transfer region 81. Gas and liquid can enter and exit the mass transfer region 81. The first welding method is that the edge position 82 of the anode metal net 6 and the edge position 82 of the bipolar plate 1 are welded with each other, and the edge position 82 of the anode gas diffusion layer 2 and the edge position 82 of the anode metal net 6 are welded with each other.
As shown in fig. 4, the second welding method is to weld the edge position 82 of the anode wire mesh 6 and the edge position 82 of the bipolar plate 1 to each other, and to weld the edge position 82 of the anode gas diffusion layer 2 and the edge position 82 of the bipolar plate 1 to each other, and after welding, the anode wire mesh 6 covers the inside of the bipolar plate 1 and the anode gas diffusion layer 2.
The two welding modes for forming the integrated structure 5 are ultrasonic welding or laser welding.
In this embodiment, a ring of sheet metal structure is disposed around the anode metal mesh 6 and the anode gas diffusion layer 2. The anode metal mesh 6 and the anode gas diffusion layer 2 are fixed to the sheet metal structure in a fitting manner or in a clamping manner. The aforementioned edge locations 82 of the anode metal mesh 6 and the anode gas diffusion layer 2 are formed on the metal sheet structure, and the mass transfer regions 81 are formed on the anode metal mesh 6 and the anode gas diffusion layer 2. In the above two welding methods, the edge 82 of the bipolar plate 1, the sheet metal structure corresponding to the anode wire mesh 6, and the sheet metal structure of the anode gas diffusion layer 2 are welded to each other. In a specific design, the thickness of the anode metal mesh 6 and the thickness of the anode gas diffusion layer 2 are respectively greater than the thickness of the corresponding sheet metal structure.
In this embodiment, the pore size of the anode metal mesh 6 is larger than the pore size of the anode gas diffusion layer 2, so that the pore size of the anode metal mesh 6 and the pore size of the anode gas diffusion layer 2 cooperate with each other to form a gradient pore size. A gradient diffusion channel is formed between the anode metal net 6 and the anode gas diffusion layer 2 so as to effectively promote gas-liquid mass transfer and reduce the energy consumption of hydrogen production by water electrolysis.
Embodiment II,
On the basis of the first embodiment, a cathode gas diffusion layer 3 is arranged on the cathode side of the bipolar plate 1, and a cathode metal mesh 7 is arranged between the bipolar plate 1 and the cathode gas diffusion layer 3, and the bipolar plate 1, the cathode gas diffusion layer 3 and the cathode metal mesh 7 are welded and sealed at an edge position 82 along the circumferential direction to form a whole structure. The structure and function of the cathode metal mesh 7 and the cathode gas diffusion layer 3 are the same as those of the anode metal mesh 6 and the anode gas diffusion layer 2 in the first embodiment, and the welding manner is the same as that of the bipolar plate 1, the anode gas diffusion layer 2 and the anode metal mesh 6, and will not be described in detail. Through the structural design, the cathode gas diffusion layer 3, the cathode metal net 7, the bipolar plate 1, the anode metal net 6 and the anode gas diffusion layer 2 form an integrated structure 5 so as to further improve the integrity of the bipolar plate 1 assembly.
In specific use, the bipolar plate 1, the anode metal mesh 6 and the anode gas diffusion layer 2 are formed into an integral structure 5 in a welding mode, and the integral structure 5 is integrally assembled into the electrolytic water tank, so that the assembly efficiency of the electrolytic tank can be effectively improved. Under the environment of the anode of the electrolytic cell, the oxidation-resistant metal coating sprayed on the integrated structure 5 can delay passivation and oxidation of the integrated structure 5 under the environment of the anode of the electrolytic cell. In the integrated structure 5, only one surface of the integrated structure 5 can be subjected to oxidation-resistant metal coating treatment, so that the surface area of noble metal coating treatment is effectively reduced, and the manufacturing cost of the electrolytic cell is saved.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.
Claims (7)
1. An integrated bipolar plate assembly for PEM electrolyzed water comprises a bipolar plate and an anode gas diffusion layer arranged on the anode side of the bipolar plate; the method is characterized in that:
an anode metal net is arranged between the bipolar plate and the anode gas diffusion layer;
the bipolar plate, the anode gas diffusion layer and the anode metal net are welded and sealed at the edge position along the circumferential direction to form an integrated structure; and an antioxidant metal coating is arranged on the surface of the integrated structure, which is opposite to the bipolar plate.
2. An integrated bipolar plate assembly for PEM electrolyzed water according to claim 1 wherein: the side surface of the anode side of the bipolar plate, the anode metal net and the anode gas diffusion layer are provided with mass transfer areas and the edge positions formed around the outer sides of the mass transfer areas; the edge positions of the anode metal mesh and the bipolar plate are welded with each other, and the edge positions of the anode gas diffusion layer and the anode metal mesh are welded with each other; alternatively, the edge positions of the anode metal mesh and the bipolar plate are welded to each other, and the edge positions of the anode gas diffusion layer and the bipolar plate are welded to each other.
3. An integrated bipolar plate assembly for PEM electrolyzed water according to claim 1 wherein: the antioxidation metal coating is a titanium metal coating.
4. An integrated bipolar plate assembly for PEM electrolyzed water according to claim 1 wherein: the welding mode for forming the integral structure is ultrasonic welding or laser welding.
5. An integrated bipolar plate assembly for PEM electrolyzed water according to claim 2 wherein: a circle of metal sheet structures are arranged around the anode metal net; the edge position of the anode metal mesh is formed on the metal sheet structure, and the mass transfer region is formed on the anode metal mesh.
6. An integrated bipolar plate assembly for PEM electrolyzed water according to claim 1 wherein: the pore size of the anode metal mesh is larger than that of the anode gas diffusion layer.
7. An integrated bipolar plate assembly for PEM electrolyzed water according to claim 1 wherein: the integrated bipolar plate assembly comprises a cathode gas diffusion layer arranged on the cathode side of the bipolar plate and a cathode metal net arranged between the bipolar plate and the cathode gas diffusion layer; the bipolar plate, the cathode gas diffusion layer and the cathode metal net are welded and sealed at the edge along the circumferential direction to form an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321916818.9U CN220724364U (en) | 2023-07-20 | 2023-07-20 | PEM electrolyzes water with two polar plate subassemblies of integration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321916818.9U CN220724364U (en) | 2023-07-20 | 2023-07-20 | PEM electrolyzes water with two polar plate subassemblies of integration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220724364U true CN220724364U (en) | 2024-04-05 |
Family
ID=90486387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321916818.9U Active CN220724364U (en) | 2023-07-20 | 2023-07-20 | PEM electrolyzes water with two polar plate subassemblies of integration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220724364U (en) |
-
2023
- 2023-07-20 CN CN202321916818.9U patent/CN220724364U/en active Active
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