CN220099219U - Metal diffusion laminated layer structure of water electrolysis tank - Google Patents
Metal diffusion laminated layer structure of water electrolysis tank Download PDFInfo
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- CN220099219U CN220099219U CN202321085173.9U CN202321085173U CN220099219U CN 220099219 U CN220099219 U CN 220099219U CN 202321085173 U CN202321085173 U CN 202321085173U CN 220099219 U CN220099219 U CN 220099219U
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- 239000002184 metal Substances 0.000 title claims abstract description 175
- 238000009792 diffusion process Methods 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 81
- 238000003475 lamination Methods 0.000 claims abstract description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 59
- 238000010586 diagram Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses a metal diffusion laminated layer structure of a water electrolysis tank. The metal diffusion lamination layer structure of the water electrolysis tank comprises a plurality of layers of alternately stacked metal nets in a first direction and metal nets in a second direction, wherein the metal nets in the first direction and the metal nets in the second direction are connected into a whole through welding points arranged in an array; the long axis direction of the first diamond-shaped mesh in the first-direction metal net is perpendicular to the long axis direction of the second diamond-shaped mesh in the second-direction metal net. According to the utility model, the diffusion layers are formed by two metal meshes in an alternating stacking mode, and the thickness of the diffusion layers can be adjusted according to the stacking quantity; and the stacked metal nets are connected by adopting a welding method to form a composite body with stable structure and smooth appearance, so that the interface contact resistance between the layers is effectively reduced.
Description
Technical Field
The utility model relates to the technical field of water electrolytic baths, in particular to a metal diffusion laminated layer structure of a water electrolytic bath.
Background
The water electrolyzer is an electrochemical device which is supplied with electric energy to decompose water into hydrogen and oxygen. The plates inside the cell form a porous or a diffusion layer with flow channels. The diffusion layer of the electrolytic cell is filled with excessive deionized water or electrolyte, and the generated hydrogen or oxygen can be discharged out of the electrolytic cell along with the residual deionized water or electrolyte in a two-phase flow mode. The diffusion layer of the electrolytic cell needs to have a certain thickness to ensure the smoothness of water flow and air flow, and also needs to have higher strength to ensure that the internal pore structure of the diffusion layer is not deformed under the assembly pressure of the electrolytic cell.
The prior art has the disadvantage of relatively large water and air flow resistances due to the single-layer flow channels or diffusion layers. The prior art also has the proposal of stacking and combining by a plurality of diffusion layers, and has the defects that the stacked diffusion layers are directly not connected, are easy to misplace and have larger resistance between interfaces to influence the efficiency and the service life of the water electrolysis tank.
Disclosure of Invention
The embodiment of the utility model provides a metal diffusion laminated layer structure of a water electrolysis tank, which can solve the problem of single layer at present. The water electrolyzer diffusion layers cause the defect of relatively higher water flow and air flow resistance, and when the scheme of stacking and combining the diffusion layers is adopted, the stacked diffusion layers are directly not connected, dislocation is easy, and the water electrolyzer efficiency and service life are greatly affected by the resistance between interfaces.
The embodiment of the utility model provides a metal diffusion lamination layer structure of a water electrolytic tank, which comprises a plurality of layers of alternately stacked metal nets in a first direction and metal nets in a second direction, wherein the metal nets in the first direction and the metal nets in the second direction are connected into a whole through welding points arranged in an array;
the first-direction metal net is formed by connecting a plurality of first metal wires which are arranged in parallel in a first direction and a plurality of second metal wires which are arranged in parallel in a second direction, and the first direction is different from the second direction; two adjacent first metal wires and two adjacent second metal wires enclose a first diamond-shaped mesh;
the second-direction metal net is formed by connecting a plurality of third metal wires which are arranged in parallel in a third direction and a plurality of fourth metal wires which are arranged in parallel in a fourth direction, and the third direction is different from the fourth direction; two adjacent third metal wires and two adjacent fourth metal wires enclose a second diamond-shaped mesh;
the long axis direction of the first diamond-shaped mesh is perpendicular to the long axis direction of the second diamond-shaped mesh.
Further, the long pitch of the first diamond-shaped meshes is 1 mm-2 mm; the long pitch of the second diamond-shaped meshes is 1 mm-2 mm.
Further, the long pitch of the first diamond-shaped mesh is equal to the long pitch of the second diamond-shaped mesh; the area of the first diamond-shaped mesh is equal to that of the second diamond-shaped mesh.
Further, the included angle between the first direction and the second direction ranges from 30 degrees to 60 degrees; the included angle between the third direction and the fourth direction ranges from 30 degrees to 60 degrees.
Further, the areas of the first-direction metal mesh and the second-direction metal mesh are the same, and the outer edges of the first-direction metal mesh and the second-direction metal mesh are flush.
Further, the first-direction metal mesh and the second-direction metal mesh are arranged to be 3-8 layers.
Further, when the upper side and the lower side of the first-direction metal mesh are welded with the second-direction metal mesh, the welding point on the upper surface of the first-direction metal mesh is not overlapped with the welding point on the lower surface of the first-direction metal mesh.
Further, when the upper side and the lower side of the second-direction metal mesh are welded with the first-direction metal mesh, the welding point on the upper surface of the second-direction metal mesh is not overlapped with the welding point on the lower surface of the second-direction metal mesh.
Further, the welding points on the first-direction metal net and the second-direction metal net are linear; the welding point of the upper surface of the first-direction metal net is a first welding line, and the welding point of the lower surface of the first-direction metal net is a second welding line; the welding point of the lower surface of the second-direction metal net is a first welding line, and the welding point of the upper surface of the second-direction metal net is a second welding line; the first welding lines and the second welding lines are uniformly distributed in the whole outline area of the first-direction metal mesh and the whole outline area of the second-direction metal mesh.
Further, the projections of the first weld lines on the different metal meshes coincide, and the projections of the second weld lines on the different metal meshes coincide.
According to the water electrolytic tank metal diffusion layer lamination structure provided by the embodiment of the utility model, the diffusion layers are formed by alternately stacking the two metal meshes, and the thickness of the diffusion layers can be adjusted according to the stacking quantity; and the stacked metal nets are connected by adopting a welding method to form a composite body with stable structure and smooth appearance, so that the interface contact resistance between the layers is effectively reduced.
Drawings
The technical solution and other advantageous effects of the present utility model will be made apparent by the following detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings.
FIG. 1 shows a first-direction metal mesh and a second-direction metal mesh cut along two different mesh directions according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of alternating stacking of metal meshes in a first direction and metal meshes in a second direction according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram illustrating the placement of the first weld line and the second weld line according to an embodiment of the present utility model;
FIG. 4 is a schematic cross-sectional view of a welded water cell metal diffusion laminate structure according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of a process for forming a laminated structure of a metal diffusion layer of a water electrolysis cell by welding a plurality of metal meshes according to an embodiment of the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Specifically, referring to fig. 1 to 4, an embodiment of the present utility model provides a metal diffusion laminated layer structure of a water electrolysis cell, which includes a plurality of layers of alternately stacked metal meshes 1 in a first direction and metal meshes 2 in a second direction, wherein the metal meshes 1 in the first direction and the metal meshes 2 in the second direction are connected into a whole through welding points arranged in an array.
The first-direction metal net 1 is formed by connecting a plurality of first metal wires which are arranged in parallel in a first direction and a plurality of second metal wires which are arranged in parallel in a second direction, and the first direction is different from the second direction; two adjacent first metal wires and two adjacent second metal wires enclose a first diamond-shaped mesh.
The second-direction metal mesh 2 is formed by connecting a plurality of third metal wires which are arranged in parallel and are arranged in a third direction and a plurality of fourth metal wires which are arranged in parallel and are arranged in a fourth direction, and the third direction is different from the fourth direction; two adjacent third metal wires and two adjacent fourth metal wires enclose a second diamond-shaped mesh.
The long axis direction of the first diamond-shaped mesh is perpendicular to the long axis direction of the second diamond-shaped mesh.
Further, the long pitch of the first diamond-shaped meshes is 1 mm-2 mm; the long pitch of the second diamond-shaped meshes is 1 mm-2 mm.
Further, the long pitch of the first diamond-shaped mesh is equal to the long pitch of the second diamond-shaped mesh; the area of the first diamond-shaped mesh is equal to that of the second diamond-shaped mesh.
Further, the included angle between the first direction and the second direction ranges from 30 degrees to 60 degrees; the included angle between the third direction and the fourth direction ranges from 30 degrees to 60 degrees.
Further, the areas of the first direction metal mesh 1 and the second direction metal mesh 2 are the same, and the outer edges of the first direction metal mesh 1 and the second direction metal mesh 2 are flush.
It is understood that the first direction metal mesh 1 and the second direction metal mesh 2 use metal meshes with the same opening size, and the metal meshes are cut into the required external dimensions according to the directions of mutually perpendicular meshes. The metal net is prepared by a punching and stretching process, and is provided with diamond or approximately diamond-shaped meshes, wherein the hole size of the meshes in the long axis direction is long pitch, and is generally 1-2 mm. The long pitch is the distance between the centers of the diagonal nodes of the diamond-shaped mesh and the long direction. The short pitch is the distance between the centers of the diagonal nodes of the diamond meshes and the short direction. Fig. 1 shows two metal meshes in the placement direction, namely a first-direction metal mesh 1 and a second-direction metal mesh 2. The two metal nets have the same external dimensions, and the long pitch directions of the meshes are mutually perpendicular. In the embodiment, only a metal net with an opening size is needed, a multi-layer three-dimensional pore structure is realized by stacking in different directions, and the water vapor transmission in the diffusion layer is enhanced. By adjusting the number of lamination layers, diffusion layer structures with different thicknesses are flexibly realized.
The stacked metal meshes are connected into a whole through a laser welding process, and the outer edges are aligned. The multilayer metal net is connected through welding, and the structure is reliable and stable, can reduce the resistance between the interface. The laser welding process controls that only one pair of metal nets is welded at a time, and n layers of metal nets are required to be welded for n-1 times. In each welding process, the depth of a welding pool is controlled to be not more than the total thickness of the two layers of metal meshes. The laser welding process is adopted, the equipment is simple, the speed is high, and the cost is low.
The two metal meshes in different directions are alternately stacked, and at least two layers are arranged, wherein the metal meshes in the first direction 1 and the metal meshes in the second direction 2 are generally 3-8 layers. Fig. 2 shows a schematic view of a water cell diffusion layer formed by stacking 4 layers of metal mesh. The first layer 1a is a first-direction metal net 1, the second layer 2a is a second-direction metal net 2, the third layer 1b is the first-direction metal net 1, and the fourth layer 2b is the second-direction metal net 2.
Further, when the second direction metal mesh 2 is welded to both the upper and lower sides of the first direction metal mesh 1, the welding point on the upper surface of the first direction metal mesh 1 does not coincide with the welding point on the lower surface of the first direction metal mesh 1. When the upper and lower sides of the second-direction metal mesh 2 are welded with the first-direction metal mesh 1, the welding point on the upper surface of the second-direction metal mesh 2 is not overlapped with the welding point on the lower surface of the second-direction metal mesh 2. The welding points are alternately arranged in a staggered mode, the formed structure is stable, and deformation caused by welding stress can be reduced.
Further, the welding points on the first-direction metal mesh 1 and the second-direction metal mesh 2 are linear; the welding point of the upper surface of the first-direction metal net 1 is a first welding line 3, and the welding point of the lower surface of the first-direction metal net 1 is a second welding line 4; the welding point of the lower surface of the second-direction metal net 2 is a first welding line 3, and the welding point of the upper surface of the second-direction metal net 2 is a second welding line 4; the first welding line 3 and the second welding line 4 are uniformly distributed over the whole contour area of the first-direction metal mesh 1 and the second-direction metal mesh 2.
Further, the projections of the first weld lines 3 on the different metal meshes coincide, and the projections of the second weld lines 4 on the different metal meshes coincide. Thus being convenient for welding in a mechanical automation mode.
In use, two different weld line arrangements are designed, namely the first weld line 3 and the second weld line 4, in the region of the desired diffusion layer; different weld line arrangements are alternately selected during the multiple welding passes. And positioning and overlapping the two welding line arrangement schemes according to the whole outline, wherein the first welding line 3 and the second welding line 4 are not overlapped, and the first welding line 3 and the second welding line 4 are uniformly distributed in the whole outline area. The welding lines are alternately arranged in a staggered mode, and deformation caused by welding stress can be reduced.
Two different weld line arrangements are designed in the required diffusion layer region; different weld line arrangements are alternately selected during the multiple welding passes. In fig. 3, a first weld line 3 arrangement and a second weld line 4 arrangement are illustrated, respectively. And (3) positioning and overlapping the two welding line arrangement schemes according to the overall outline, wherein the first welding line 3 and the second welding line 4 are not overlapped, and the union of the first welding line 3 and the second welding line 4 is uniformly distributed in the whole outline area.
The welding process is schematically shown in fig. 5, where first layer 1a is stacked with second layer 2a such that laser welding head 5a moves over second layer 2a along first weld line 3 path 6a to form first layer weld line 3a. Then, the third layer 1b is paired Ji Diefang over the first and second layers 1a and 2a welded together, so that the laser welding head 5b is moved over the third layer 1b in accordance with the second weld line 4 path 6b to form the second layer weld line 4a. Finally, the fourth layer 2b is paired Ji Diefang over the welded integrated layers 1a,2a,1b such that the laser welding head 5c is moved over the fourth layer 2b in accordance with the first weld line 3 path 6c to form the third layer weld line 3b. The distribution of welding lines of the cross sections of the welded four layers of metal meshes is shown in fig. 4, and the positions of the welding lines of two adjacent layers are staggered.
According to the water electrolytic tank metal diffusion layer lamination structure provided by the embodiment of the utility model, the diffusion layers are formed by alternately stacking the two metal meshes, and the thickness of the diffusion layers can be adjusted according to the stacking quantity; and the stacked metal nets are connected by adopting a welding method to form a composite body with stable structure and smooth appearance, so that the interface contact resistance between the layers is effectively reduced.
The water electrolysis cell metal diffusion layer lamination structure provided by the embodiment of the utility model is simultaneously applicable to an alkaline electrolysis cell and a proton exchange membrane electrolysis cell, and is also simultaneously applicable to a cathode part and an anode part of the electrolysis cell.
The foregoing has described in detail a metal diffusion laminated layer structure of a water electrolytic cell provided by the embodiments of the present utility model, and specific examples have been applied herein to illustrate the principles and embodiments of the present utility model, and the above description of the embodiments is only for aiding in understanding the technical solution and core idea of the present utility model; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. The metal diffusion lamination layer structure of the water electrolysis cell is characterized by comprising a plurality of layers of alternately stacked metal nets in a first direction and metal nets in a second direction, wherein the metal nets in the first direction and the metal nets in the second direction are connected into a whole through welding points arranged in an array;
the first-direction metal net is formed by connecting a plurality of first metal wires which are arranged in parallel in a first direction and a plurality of second metal wires which are arranged in parallel in a second direction, and the first direction is different from the second direction; two adjacent first metal wires and two adjacent second metal wires enclose a first diamond-shaped mesh;
the second-direction metal net is formed by connecting a plurality of third metal wires which are arranged in parallel in a third direction and a plurality of fourth metal wires which are arranged in parallel in a fourth direction, and the third direction is different from the fourth direction; two adjacent third metal wires and two adjacent fourth metal wires enclose a second diamond-shaped mesh;
the long axis direction of the first diamond-shaped mesh is perpendicular to the long axis direction of the second diamond-shaped mesh.
2. The water cell metal diffusion laminate structure of claim 1, wherein the first diamond mesh has a long pitch of 1mm to 2mm; the long pitch of the second diamond-shaped meshes is 1 mm-2 mm.
3. The water electrolyser metal diffusion laminate structure of claim 2, wherein the long pitch of the first diamond mesh is equal to the long pitch of the second diamond mesh; the area of the first diamond-shaped mesh is equal to that of the second diamond-shaped mesh.
4. The water cell metal diffusion laminated layer structure of claim 1, wherein an included angle between the first direction and the second direction is in a range of 30 ° -60 °; the included angle between the third direction and the fourth direction ranges from 30 degrees to 60 degrees.
5. The water electrolyser metal diffusion laminate structure of claim 1 wherein the area of said first direction metal mesh and said second direction metal mesh are the same, the outer edges of said first direction metal mesh and said second direction metal mesh being flush.
6. The water electrolyser metal diffusion laminate structure of claim 1, wherein the first direction metal mesh and the second direction metal mesh are provided in 3-8 layers.
7. The water electrolyser metal diffusion laminated layer structure of claim 1 wherein when both the upper and lower sides of the first direction metal mesh are welded with the second direction metal mesh, the welding point of the upper surface of the first direction metal mesh is not coincident with the welding point of the lower surface of the first direction metal mesh.
8. The water cell metal diffusion laminated layer structure of claim 7, wherein when both upper and lower sides of the second direction metal mesh are welded with the first direction metal mesh, the welding point of the upper surface of the second direction metal mesh is not overlapped with the welding point of the lower surface of the second direction metal mesh.
9. The water cell metal diffusion laminate structure of claim 8, wherein the welds on both the first direction wire mesh and the second direction wire mesh are linear; the welding point of the upper surface of the first-direction metal net is a first welding line, and the welding point of the lower surface of the first-direction metal net is a second welding line; the welding point of the lower surface of the second-direction metal net is a first welding line, and the welding point of the upper surface of the second-direction metal net is a second welding line; the first welding lines and the second welding lines are uniformly distributed in the whole outline area of the first-direction metal mesh and the whole outline area of the second-direction metal mesh.
10. The water electrolyser metal diffusion laminate structure of claim 9, wherein the projections of the first weld lines on different metal meshes coincide and the projections of the second weld lines on different metal meshes coincide.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321085173.9U CN220099219U (en) | 2023-05-08 | 2023-05-08 | Metal diffusion laminated layer structure of water electrolysis tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321085173.9U CN220099219U (en) | 2023-05-08 | 2023-05-08 | Metal diffusion laminated layer structure of water electrolysis tank |
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| CN220099219U true CN220099219U (en) | 2023-11-28 |
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| CN202321085173.9U Active CN220099219U (en) | 2023-05-08 | 2023-05-08 | Metal diffusion laminated layer structure of water electrolysis tank |
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