CN116949475A - Multi-cavity unipolar plate and electrolytic tank for electrolytic hydrogen production - Google Patents
Multi-cavity unipolar plate and electrolytic tank for electrolytic hydrogen production Download PDFInfo
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- CN116949475A CN116949475A CN202311203524.6A CN202311203524A CN116949475A CN 116949475 A CN116949475 A CN 116949475A CN 202311203524 A CN202311203524 A CN 202311203524A CN 116949475 A CN116949475 A CN 116949475A
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- cavity
- region
- unipolar plate
- plate
- flow channel
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000001257 hydrogen Substances 0.000 title claims abstract description 51
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000004891 communication Methods 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 229910001868 water Inorganic materials 0.000 claims description 28
- 239000012528 membrane Substances 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 239000012530 fluid Substances 0.000 abstract description 47
- 238000007789 sealing Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 19
- 239000007789 gas Substances 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000005868 electrolysis reaction Methods 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 6
- 239000003292 glue Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- 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
-
- 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
-
- 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
- Y02E60/50—Fuel cells
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application discloses a multi-cavity single-pole plate and an electrolytic tank for electrolytic hydrogen production. The cushion blocks are arranged on two sides of the cavity opening area along the thickness direction of the multi-cavity single pole plate, the cushion blocks cover the cavity opening area, the first through holes correspond to the cavity openings of the cavity opening area, and at least part of the cushion blocks are provided with flow channels which are communicated with the cavity openings and the flow field areas. The cushion block can cover the cavity mouth area in the thickness direction of the multi-cavity single pole plate and circumferentially surrounds the cavity mouth of the cavity mouth area, so that the cavity mouth of the cavity mouth area is sealed, the leakage of fluid from the cavity mouth to the outer side of the multi-cavity single pole plate is reduced, the risk of leakage of the fluid from the cavity mouth to other cavity mouths is reduced, the sealing performance of the cavity mouth area is improved, and the safety of the multi-cavity single pole plate in the working process is improved.
Description
Technical Field
The application relates to the technical field of electrolytic tanks, in particular to a multi-cavity unipolar plate and an electrolytic tank for producing hydrogen by electrolysis.
Background
In the prior art, an electrolytic cell is generally composed of a polar plate, a proton exchange membrane, a power supply, a hydrogen treatment system, an oxygen treatment system and the like. When the polar plates and the proton exchange membranes are alternately laminated, the anode side between the proton exchange membrane and the anode side is used for transmitting water and discharging oxygen, and the cathode side between the proton exchange membrane and the cathode side is used for discharging hydrogen. Meanwhile, the anode side of the polar plate is provided with an anode sealant line and a water inlet and outlet flow channel which is communicated with the cavity opening and the flow field region, and the cathode side of the polar plate is provided with a cathode sealant line and a hydrogen outlet flow channel which is communicated with the cavity opening and the flow field region.
In the process of assembling the proton exchange membrane and the two polar plates, an anode sealing glue line positioned on the polar plate at the anode side can be attached to a hydrogen outlet flow channel and a cathode sealing glue line positioned on the polar plate at the cathode side, and a cathode sealing glue line positioned on the polar plate at the cathode side can be attached to a water inlet and outlet flow channel and the anode sealing glue line positioned on the polar plate at the anode side. However, the two polar plates have the risk that the joint of the cavity opening and the flow channel cannot be completely blocked by the sealant line in the assembly process, so that fluid is easy to flow out of the flow channel, and the risk of water, oxygen and hydrogen leakage exists.
Disclosure of Invention
The application aims to provide a multi-cavity unipolar plate and an electrolytic tank for electrolytic hydrogen production, which are used for solving the technical problem of poor sealing performance of a joint of a cavity opening and a runner in the prior art.
The application provides a multi-cavity single-pole plate, which comprises a plate body and a cushion block, wherein the plate body comprises a flow field area and cavity opening areas, the cavity opening areas are distributed on two sides of the flow field area along the length direction of the multi-cavity single-pole plate, and the cushion block is provided with first through holes. The cushion blocks are arranged on two sides of the cavity opening area along the thickness direction of the multi-cavity single-pole plate, the cushion blocks cover the cavity opening area, the first through holes correspond to the cavity openings of the cavity opening area, and at least part of the cushion blocks are provided with flow passages which are communicated with the cavity openings and the flow field area.
According to the embodiment of the application, the cushion block can cover the cavity opening area in the thickness direction of the multi-cavity single-pole plate and circumferentially surround the cavity opening of the cavity opening area, so that the cavity opening of the cavity opening area is sealed, the risk of leakage of fluid from the cavity opening to the outer side of the multi-cavity single-pole plate is reduced, the risk of leakage of the fluid from the cavity opening to other cavity openings is reduced, the sealing performance of the cavity opening area is improved, and the safety of the multi-cavity single-pole plate in the working process is improved. Meanwhile, after the cushion block is arranged on the multi-cavity single-pole plate, the cushion block can play a role in sealing the cavity opening, and the requirement of the electrolytic tank for electrolytic hydrogen production on the sealing reliability of the adhesive tape is reduced. When the multiple multi-cavity single-pole plates are assembled into the electrolytic tank for electrolytic hydrogen production, the cushion blocks on the cavity port areas are extruded along the height direction of the electrolytic tank for electrolytic hydrogen production, so that the connection between the cushion blocks and the plate body is tighter, the sealing effect of the cushion blocks on the cavity ports is further improved, the possibility of fluid leakage is reduced, the fluid can be ensured to fully react in the flow field areas of the multiple multi-cavity single-pole plates, and the working performance of the electrolytic tank for electrolytic hydrogen production is improved. The first through holes of the cushion block correspond to the cavity openings of the cavity opening area in the thickness direction of the multi-cavity single-pole plate, so that fluid can flow into or flow out of the single-pole plate through the cavity openings and the first through holes, and the fluidity of the fluid is guaranteed. Meanwhile, the flow channel used for communicating the cavity opening and the flow field area is arranged on one side of the cushion block towards the plate body, when the cushion block is arranged on the plate body, the cushion block can form a sealed flow channel in the thickness direction of the multi-cavity single-plate, the possibility of leakage of fluid in the flow channel is reduced, in addition, the rigidity of the cushion block and the plate body is higher, the structural stability of the flow channel is higher, the influence of extrusion is not easy, and the flow of the fluid is facilitated.
In one possible embodiment, the cavity port region includes a first cavity port region and a second cavity port region, the first cavity port region is in communication with the flow field region through the flow channel, and on the multi-cavity unipolar plate, the cavity port of the second cavity port region is not in communication with the flow field region.
In one possible implementation manner, the cushion block comprises a communication block and a blocking block, the communication block is provided with the flow channel, the communication block covers the first cavity opening area, the blocking block covers the second cavity opening area, and the cavity opening of the second cavity opening area is separated from the flow field area by the blocking block.
In a possible embodiment, the plate body is provided with a second through hole, which is located between the cavity port of the first cavity port region and the flow field region, in a direction of the first cavity port region toward the flow field region; along the thickness direction of the multi-cavity unipolar plate, the multi-cavity unipolar plate comprises an anode surface and a cathode surface which are oppositely arranged, the communication block comprises a first communication block arranged on the anode surface and a second communication block arranged on the cathode surface, the first communication block is provided with a first flow channel, the second communication block is provided with a second flow channel, and the cavity port of the first cavity port area is communicated with the flow field area through the first flow channel, the second through hole and the second flow channel; the projections of the first flow channel and the second flow channel along the thickness direction of the multi-cavity unipolar plate are at least partially non-overlapping.
In one possible embodiment, the first cavity opening area includes a water inlet cavity opening area and a water outlet cavity opening area, and in the water inlet cavity opening area and the water outlet cavity opening area, the opening of the first flow channel faces to the flow field area so as to communicate the second through hole and the flow field area.
In one possible implementation manner, in the water inlet cavity opening area, the inlet of the first flow channel and the second through hole are aligned along the thickness direction of the multi-cavity unipolar plate, and in the water outlet cavity opening area, the outlet of the first flow channel and the second through hole are aligned along the thickness direction of the multi-cavity unipolar plate.
In a possible implementation manner, the first cavity opening area includes a hydrogen outlet cavity opening area, and in the hydrogen outlet cavity opening area, an opening of the first flow channel faces to a cavity opening of the hydrogen outlet cavity opening area so as to communicate the second through hole with the cavity opening of the hydrogen outlet cavity opening area.
In one possible embodiment, in the hydrogen outlet cavity opening area, the inlet of the first flow channel and the second through hole are aligned along the thickness direction of the multi-cavity unipolar plate.
In one possible embodiment, the second communicating block includes a communicating plate located between the corresponding cavity port and the flow field region, the second flow channel penetrating the communicating plate of the second communicating block along a length direction of the multi-cavity unipolar plate; along the length direction of the multi-cavity unipolar plate, one side of the first flow channel is provided with an opening, and the other side is not provided with an opening.
In one possible embodiment, at least a portion of the block conforms to the flow field region along the length of the multi-cavity unipolar plate.
In one possible embodiment, the plate body includes a first mounting groove for mounting the pad.
The application also provides an electrolytic tank for producing hydrogen by electrolysis, which comprises a proton exchange membrane and a multi-cavity single-pole plate which are arranged in a stacked manner, wherein the multi-cavity single-pole plate is the multi-cavity single-pole plate, and the proton exchange membrane is arranged between the adjacent multi-cavity single-pole plates.
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 as claimed.
Drawings
FIG. 1 is a schematic view of a multi-cavity unipolar plate according to one embodiment of the present application;
FIG. 2 is a schematic view of the plate body of FIG. 1;
FIG. 3 is an enlarged view of a portion of region I of FIG. 2;
FIG. 4 is a schematic view of the structure of the first communicating block provided by the present application in the inlet and outlet cavity areas;
FIG. 5 is a schematic view of the structure of the first communicating block in the hydrogen outlet area according to the present application;
fig. 6 is a schematic structural view of a second communication block according to the present application.
Reference numerals illustrate:
1-a multi-cavity unipolar plate;
11-a plate body;
12-flow field region;
13-cavity mouth region;
131-cavity port;
132-a first cavity port region;
132 a-a water inlet chamber port region;
132 b-an outlet chamber port area;
132 c-a hydrogen outlet chamber port region;
133-a second cavity port region;
133 a-a water cavity port region;
133 b-a perhydrogen chamber port region;
14-jump layer region;
141-a second through hole;
15-anode side;
16-cathode face;
17-a first mounting groove;
2-cushion blocks;
21-a first through hole;
22-communicating blocks;
221-flow channel;
222-a first communication block;
222 a-a first flow channel;
223-a second communication block;
223 a-a second flow channel;
224-communicating plate;
23-plugging blocks;
3-adhesive tape.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Detailed Description
The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
The embodiment of the application provides a multi-cavity single-pole plate and an electrolytic cell for electrolytic hydrogen production, wherein the electrolytic cell comprises a multi-cavity single-pole plate 1 and a proton exchange membrane which are arranged in a stacked manner, and the proton exchange membrane is positioned between two adjacent multi-cavity single-pole plates 1 along the thickness direction of the electrolytic cell for electrolytic hydrogen production. In a specific implementation manner, when a plurality of multi-cavity unipolar plates 1 of the embodiment of the application are assembled into an electrolytic tank for electrolytic hydrogen production, each multi-cavity unipolar plate 1 is arranged along the height direction of the electrolytic tank for electrolytic hydrogen production, and a proton exchange membrane is arranged between two adjacent multi-cavity unipolar plates 1, and as the electrolytic reaction of liquid is realized in the electrolytic tank for electrolytic hydrogen production, one surface of each adjacent multi-cavity unipolar plate 1 facing the proton exchange membrane is an anode surface 15, and the other surface is a cathode surface 16, so that the anode surface 15 and the cathode surface 16 of each adjacent multi-cavity unipolar plate 1 are matched, the liquid is transmitted between the anode surface 15 of each multi-cavity unipolar plate 1 and the proton exchange membrane, the gas is transmitted between the cathode surface 16 of each multi-cavity unipolar plate 1 and the proton exchange membrane, the fluid flows into a flow field area 12 of the anode surface 15, and the gas is generated in the flow field area 12 of the cathode surface 16, thereby completing the electrolytic reaction.
As shown in fig. 1 and 2, the multi-chamber unipolar plate 1 includes a plate body 11 and a spacer 2. The plate body 11 comprises a flow field region 12 and a cavity opening region 13, the cavity opening region 13 is distributed on two sides of the flow field region 12 along the length direction of the multi-cavity unipolar plate 1, the cushion block 2 is provided with first through holes 21, the cushion block 2 is positioned on two sides of the cavity opening region 13 along the thickness direction of the multi-cavity unipolar plate 1 and covers the cavity opening region 13, and the first through holes 21 correspond to the cavity openings 131 of the cavity opening region 13. Meanwhile, at least part of the gasket 2 is provided with a flow channel 221 communicating the cavity port 131 and the flow field region 12.
In the embodiment of the application, the cushion block 2 can cover the cavity opening area 13 in the thickness direction of the multi-cavity unipolar plate 1 and circumferentially surround the cavity opening 131 of the cavity opening area 13, so that the cavity opening 131 of the cavity opening area 13 is sealed, the leakage of fluid from the cavity opening 131 to the outer side of the multi-cavity unipolar plate 1 is reduced, the risk of the leakage of the fluid from the cavity opening 131 to other cavity openings 131 is reduced, the sealing performance of the cavity opening area 13 is improved, and the safety of the multi-cavity unipolar plate 1 in the working process is improved. In addition, after the cushion block 2 is arranged on the multi-cavity unipolar plate 1 in the embodiment, the cushion block 2 can play a role of sealing the cavity port 131, and the requirement of the electrolytic tank for electrolytic hydrogen production on the sealing reliability of the adhesive tape 3 is reduced. When the multiple multi-cavity unipolar plates 1 are assembled into the electrolytic tank for electrolytic hydrogen production, the cushion blocks 2 on each cavity opening area 13 are extruded along the height direction of the electrolytic tank for electrolytic hydrogen production, so that the connection between the cushion blocks 2 and the plate body 11 is tighter, the sealing effect of the cushion blocks 2 on the cavity openings 131 is further improved, the possibility of fluid leakage is reduced, and the fluid can fully react in the flow field area 12 of each multi-cavity unipolar plate 1, thereby improving the working performance of the electrolytic tank for electrolytic hydrogen production.
In addition, in a possible embodiment, as shown in fig. 1, when the multi-cavity unipolar plate 1 of the electrolytic tank for producing hydrogen by electrolysis is provided with the cushion block 2 surrounding the cavity opening 131 and the adhesive tape 3 surrounding the cavity opening 131 is provided, the cavity opening 131 is sealed by the adhesive tape 3 and the cushion block 2 together, so that the sealing performance of the cavity opening region 13 is further improved.
In one possible embodiment, the pad 2 can be mounted on the plate 11 by welding or the like, so as to improve the stability and reliability of the connection between the pad 2 and the plate 11.
As shown in fig. 1 and 2, after the spacer 2 covers the cavity area 13, the first through hole 21 of the spacer 2 corresponds to the cavity 131 of the cavity area 13 in the thickness direction of the multi-cavity unipolar plate 1, so that fluid can flow into or out of the multi-cavity unipolar plate 1 through the cavity 131 and the first through hole 21, thereby guaranteeing the fluidity of the fluid. Meanwhile, the flow channel 221 for communicating the cavity port 131 and the flow field area 12 is arranged on one side of the cushion block 2 facing the plate 11, when the cushion block 2 is arranged on the plate 11, the cushion block 2 can form a sealed flow channel 221 in the thickness direction of the multi-cavity unipolar plate 1, the possibility of leakage of fluid in the flow channel 221 is reduced, in addition, the rigidity of the cushion block 2 and the plate 11 is higher, the structural stability of the flow channel 221 is higher, the cushion block is not easy to be influenced by extrusion, and the flow of the fluid is facilitated.
Specifically, as shown in fig. 2, on the same multi-cavity unipolar plate 1, the cavity area 13 includes a first cavity area 132 and a second cavity area 133, the first cavity area 132 is communicated with the flow field area 12 through the flow channel 221 of the spacer block 2, so that the first cavity area 132 is communicated with the flow field area 12 of the multi-cavity unipolar plate 1, so that fluid can flow into the flow field area 12 through the cavity 131 and the flow channel 221 for reaction, on the multi-cavity unipolar plate 1, the spacer block 2 located in the second cavity area 133 is not provided with the flow channel 221, so that the second cavity area 133 is not communicated with the flow field area 12, so that fluid can flow into the first cavity area 132 of the adjacent multi-cavity unipolar plate 1 through the cavity 131 and the flow channel 221 of the adjacent multi-cavity unipolar plate 1 for reaction. Therefore, each cavity port 131 of the multi-cavity unipolar plate 1 is not communicated with the flow field region 12, so that in order to realize communication between the cavity port 131 and the flow field region 12 in the first cavity port region 132, the flow channels 221 of the two cushion blocks 2 positioned in the first cavity port region 132 are communicated through the plate body 11 in the thickness direction along the multi-cavity unipolar plate 1, so that fluid can react in the flow field region 12 in the unipolar plate 1, and meanwhile, fluid which does not flow into the multi-cavity unipolar plate 1 can flow into the next first cavity port region 132, so that the fluid can fully react in the corresponding flow field region 12, thereby being beneficial to improving the reaction efficiency of the fluid and improving the working performance of the electrolytic cell for producing hydrogen by electrolysis. The two cushion blocks 2 positioned in the second cavity opening area 133 are not provided with the flow channels 221, and are not communicated in the thickness direction of the multi-cavity unipolar plate 1 through the plate body 11, so that the cavity opening area 13 is sealed, the possibility that fluid flows into or flows out of the flow field area 12 of the multi-cavity unipolar plate 1 through the second cavity opening area 133 is reduced, and the sealing performance of the second cavity opening area 133 is improved.
In a specific embodiment, as shown in fig. 1, the cushion block 2 includes a communicating block 22 and a blocking block 23, where the communicating block 22 is provided with a flow channel 221, and the communicating block 22 covers the first cavity opening area 132, so as to communicate the cavity opening 131 of the first cavity opening area 132 with the flow field area 12, so that fluid can flow into the flow field area 12 to perform a reaction. The blocking block 23 covers the second cavity area 133, and the flow channels 221 are not arranged on two sides of the blocking block 23 along the thickness direction of the multi-cavity unipolar plate 1, so that the cavity opening 131 of the second cavity area 133 is separated from the flow field area 12 by the blocking block 23, the possibility that fluid in the second cavity area 133 flows into the multi-cavity unipolar plate 1 is reduced, the streaming of unreacted fluid and reacting fluid is avoided, and the sealing performance of the second cavity area 133 is improved.
As shown in fig. 2 and 3, the cavity region 13 further includes a jump-out region 14, the jump-out region 14 being located between the cavity 131 and the flow field region 12 in a direction along the cavity 131 toward the flow field region 12. Specifically, in the first cavity port region 132, as shown in fig. 3, the plate body 11 is provided with a second through hole 141, and the second through hole 141 is disposed in the jump-up region 14.
Along the thickness direction of the multi-cavity unipolar plate 1, the second through holes 141 penetrate through the plate body 11 and are communicated with the anode face 15 and the cathode face 16, so that in the first cavity mouth region 132, fluid can realize a jump layer between the anode face 15 and the cathode face 16 through the second through holes 141, when the cushion block 2 and the adhesive tape 3 seal the cavity mouth 131, communication between the cavity mouth 131 of the first cavity mouth region 132 and the flow field region 12 can be realized, so that liquid flows into the anode face 15 of the flow field region 12 to react, and gas is generated on the cathode face 16 of the flow field region 12, so that electrolytic reaction is realized. At the same time, the second through holes 141 are able to communicate with the communicating blocks 22 and act as a guide for the fluid, reducing the possibility of the liquid flowing into the cathode face 16 of the flow field region 12, and also avoiding the risk of the gases produced by electrolysis mixing together.
Specifically, as shown in fig. 1, 4 to 6, the communication block 22 includes a first communication block 222 provided to the anode face 15 and a second communication block 223 provided to the cathode face 16, as shown in fig. 4 and 5, the first communication block 222 has a first flow channel 222a, and as shown in fig. 6, the second communication block 223 has a second flow channel 223a, and since the second through hole 141 is located between the cavity port 131 of the first cavity port region 132 and the flow field region 12, the cavity port 131 of the first cavity port region 132 and the flow field region 12 can communicate through the first flow channel 222a, the second through hole 141 and the second flow channel 223a, so that the fluid in the first cavity port region 132 can flow into the flow field region 12, thereby ensuring that the fluid can smoothly flow into the flow field region 12 to perform the electrolytic reaction while improving the sealability of the first cavity port region 132.
Wherein, the projections of the first flow channel 222a and the second flow channel 223a along the thickness direction of the unipolar plate 1 are at least partially non-overlapped, that is, the first flow channel 222a can extend along the length direction of the multi-cavity unipolar plate 1 and communicate with the second through hole 141 and the flow field area 12, or the second flow channel 223a can extend along the length direction of the multi-cavity unipolar plate 1 and together with the second through hole 141 and the flow field area 12, or communicate with the second through hole 141 and the flow field area 131, so that the fluid completing the jump layer can flow to the cavity 131 or the flow field area 12 of the anode face 15, or to the cavity 131 or the flow field area 12 of the cathode face 16 through the first flow channel 222a and the second flow channel 223 a. And the first and second flow passages 222a, 223a reduce the likelihood of fluid leakage from the first and second flow passages 222a, 223a during flow.
In one specific embodiment, as shown in fig. 2, the first chamber orifice region 132 includes an inlet chamber orifice region 132a and an outlet chamber orifice region 132b, and the first flow channel 222a opens toward the flow field region 12 to communicate the second through holes 141 with the flow field region 12, thereby allowing the inflow and outflow of liquid at the anode face 15 of the flow field region 12. Specifically, as shown in fig. 2 and 6, the water inlet cavity area 132a and the water outlet cavity area 132b further include second flow channels 223a of the second communicating block 223, the first flow channels 222a are located on the anode surface 15, the second flow channels 223a are located on the cathode surface 16 along the thickness direction of the multi-cavity unipolar plate 1, and openings on one side of the second flow channels 223a face the cavity openings 131 of the water inlet cavity area 132a and the water outlet cavity area 132b, so that inflow and outflow of liquid in the multi-cavity unipolar plate 1 are realized.
In the water inlet cavity area 132a, the liquid flows from the cavity 131 into the multi-cavity unipolar plate 1 through the second flow channel 223a positioned on the cathode surface 16, after flowing out of the second flow channel 223a, the liquid realizes a jump layer through the second through hole 141, so that the liquid enters the anode surface 15 to flow into the first flow channel 222a, and the opening of the first flow channel 222a positioned on the anode surface 15 faces the flow field area 12, so that the liquid can flow into the anode surface 15 of the flow field area 12 to react.
At the outlet port region 132b, unreacted liquid flows out of the outlet field region 12 through the first flow channel 222a located on the anode surface 15, and after flowing out of the first flow channel 222a, the unreacted liquid passes through the second through holes 141 to realize a jump layer, so as to enter the cathode surface 16 and flow into the second flow channel 223a, and as the side opening of the second flow channel 223a located on the cathode surface 16 faces the cavity port 131, the unreacted liquid can flow out of the multi-cavity unipolar plate 1 and flow into the inlet port region 132a of the next multi-cavity unipolar plate 1, so that the unreacted liquid continues to react in the outlet field region 12 of the next multi-cavity unipolar plate 1.
When the multiple multi-cavity unipolar plates 1 are assembled into the electrolytic tank for electrolytic hydrogen production, the number of times that liquid flows through the flow field region 12 in the electrolytic tank for electrolytic hydrogen production can be increased, so that the liquid can fully perform electrolytic reaction in the electrolytic tank for electrolytic hydrogen production, and the working performance of the electrolytic tank for electrolytic hydrogen production can be improved.
In a specific embodiment, in the water inlet cavity area 132a, the inlet of the first flow channel 222a is aligned with the second through hole 141 along the thickness direction of the multi-cavity unipolar plate 1, and in the water outlet cavity area 132b, the outlet of the first flow channel 222a is aligned with the second through hole 141 along the thickness direction of the multi-cavity unipolar plate 1, so that the liquid can accurately flow into the first flow channel 222a from the second through hole 141 or flow out of the second through hole 141 from the first flow channel 222a, and the flowing speed of the fluid is improved, and meanwhile, the possibility of liquid backflow is reduced.
In one specific embodiment, as shown in fig. 2, the first port region 132 includes a hydrogen outlet port region 132c, and the first flow channel 222a opens toward the port 131 to communicate the second through holes 141 with the port 131 to effect gas flow from within the flow field region 12 at the cathode face 16. Specifically, the second flow channel 223a of the second communicating block 223 is further included in the hydrogen outlet chamber area 132c, the first flow channel 222a is located on the anode surface 15, the second flow channel 223a is located on the cathode surface 16, and an opening on one side of the second flow channel 223a faces the flow field area 12 located on the cathode surface 16 along the thickness direction of the multi-cavity unipolar plate 1, so that the outflow of the gas in the unipolar plate 1 is realized.
After the gas is generated at the cathode face 16 of the flow field region 12 at the hydrogen outlet cavity port region 132c, the gas flows out of the flow field region 12 through the second flow channels 223a located at the cathode face 16, and after the gas flows out of the second flow channels 223a, the gas is jump-layered through the second through holes 141 so as to enter the anode face 15 and flow into the first flow channels 222a, and the gas can flow out of the multi-cavity unipolar plate 1 due to the opening of the first flow channels 222a located at the anode face 15 facing the cavity port 131. When the multiple multi-cavity unipolar plates 1 of the embodiment of the application are assembled into the electrolytic tank for electrolytic hydrogen production, the gas of each multi-cavity unipolar plate 1 flows out from the hydrogen outlet cavity area 132c and then is gathered together for subsequent collection.
In a specific embodiment, in the hydrogen outlet chamber region 132c, the inlet of the first flow channel 222a is aligned with the second through hole 141 along the thickness direction of the multi-cavity unipolar plate 1, so that the gas can accurately flow into the first flow channel 222a from the second through hole 141, the flow speed of the gas is increased, and the possibility of gas backflow is reduced.
In a specific embodiment, as shown in fig. 4-6, the first communication block 222 and the second communication block 223 each include a communication plate 224, the communication plate 224 being located between the corresponding cavity port 131 and the flow field region 12, wherein the first flow channel 222a and the second flow channel 223a are each disposed on the communication plate 224 such that at least a portion of the first communication block 222 and the second communication block 223 can direct fluid into or out of the flow field region 12 while sealing the cavity port 131.
Along the length of the multi-chamber unipolar plate 1, one side of the first flow channel 222a has an opening, and the other side is not provided with an opening. The opening of the first flow channel 222a is used for flowing in or out fluid, and the side of the first flow channel 222a, where the opening is not provided, is used for blocking the fluid from flowing, so that the fluid flows into the second through hole 141 for jump.
Along the length direction of the multi-cavity unipolar plate 1, the second flow channel 223a penetrates the communication plate 224 of the second communication block 223. Wherein the second flow channel 223a is configured to transfer fluid to a side of the second through hole 141 facing the cathode surface 16, so that the fluid passes through the second through hole 141 for jump-up. Meanwhile, the second flow passage 223a penetrating the communication plate 224 is convenient to process, which is advantageous in reducing the production cost of the second communication block 223.
In one possible embodiment, the second flow channel 223a has an opening on one side and is not provided with an opening on the other side, such that the side of the second flow channel 223a where the opening is not provided is used to block the flow of fluid, such that the first flow channel 222a, the second flow channel 223a, and the second through hole 141 are aligned in the water inlet cavity area 132a, the inlet of the first flow channel 222a, the outlet of the second flow channel 223a, and the second through hole 141 along the thickness direction of the multi-cavity unipolar plate 1; in the outlet chamber port region 132b, the outlet of the first flow passage 222a, the inlet of the second flow passage 223a, and the second through hole 141 are aligned in the thickness direction of the multi-chamber unipolar plate 1; in the hydrogen outlet chamber port region 132c, the inlet of the first flow passage 222a, the outlet of the second flow passage 223a, and the second through hole 141 are aligned in the thickness direction of the multi-chamber unipolar plate 1.
In a specific embodiment, as shown in fig. 2, the second cavity opening area 133 includes two water passing cavity opening areas 133a and a hydrogen passing cavity opening area 133b, where the water passing cavity opening area 133a is used to transfer the liquid that does not flow into the multi-cavity unipolar plate 1 into the first cavity opening area 132 of the adjacent multi-cavity unipolar plate 1, so that the fluid flows into the flow field area 12 of the adjacent multi-cavity unipolar plate 1 to react, thereby improving the working efficiency of the electrolytic tank for producing hydrogen by electrolysis. The hydrogen passing cavity opening area 133b is used for transferring the gas generated by the adjacent multi-cavity unipolar plates 1, so that the gas generated by each multi-cavity unipolar plate 1 is collected together, and the gas is convenient to collect.
In a specific embodiment, as shown in fig. 1, at least part of the plugging block 23 is attached to the flow field region 12, so as to improve the connection reliability between the plugging block 23 and the flow field region 12, and also reduce the possibility of fluid in the flow field region 12 leaking into the second cavity opening region 133, and improve the reliability of the sealing of the second cavity opening region 133.
In a specific embodiment, as shown in fig. 3, the plate body 11 includes a first mounting groove 17, where the first mounting groove 17 is used to mount the spacer block 2, so as to limit movement of the spacer block 2 in the plate body 11, and improve stability and reliability of connection between the spacer block 2 and the plate body 11, so that when the multi-cavity unipolar plate 1 of the multiple embodiments of the present application is assembled into an electrolytic tank for producing hydrogen by electrolysis, the spacer block 2 can perform a better sealing function and a transmission function.
While the foregoing is directed to embodiments of the present application, other and further embodiments of the application may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (12)
1. A multi-cavity unipolar plate, characterized in that the multi-cavity unipolar plate (1) comprises:
the multi-cavity unipolar plate comprises a plate body (11), wherein the plate body (11) comprises a flow field region (12) and a cavity opening region (13), and the cavity opening region (13) is distributed on two sides of the flow field region (12) along the length direction of the multi-cavity unipolar plate (1);
the cushion block (2), the cushion block (2) is provided with a first through hole (21);
the cushion blocks (2) are arranged on two sides of the cavity opening area (13) along the thickness direction of the multi-cavity unipolar plate (1), the cushion blocks (2) cover the cavity opening area (13), and the first through holes (21) correspond to the cavity openings (131) of the cavity opening area (13);
at least part of the cushion block (2) is provided with a flow channel (221) which is communicated with the cavity opening (131) and the flow field area (12).
2. The multi-cavity unipolar plate according to claim 1, characterised in that the cavity port region (13) comprises a first cavity port region (132) and a second cavity port region (133), the cavity port (131) of the first cavity port region (132) being in communication with the flow field region (12) via the flow channel (221), the cavity port (131) of the second cavity port region (133) being not in communication with the flow field region (12) on the multi-cavity unipolar plate (1).
3. The multi-cavity unipolar plate of claim 2, characterized in that the spacer block (2) includes a communication block (22) and a blocking block (23), the communication block (22) is provided with the flow channel (221), the communication block (22) covers the first cavity port region (132), the blocking block (23) covers the second cavity port region (133), and the cavity ports (131) of the second cavity port region (133) are separated from the flow field region (12) by the blocking block (23).
4. A multi-cavity unipolar plate according to claim 3, characterised in that the plate body (11) is provided with a second through-hole (141), the second through-hole (141) being located between the cavity port (131) of the first cavity port region (132) and the flow field region (12) in the direction of the first cavity port region (132) towards the flow field region (12);
along the thickness direction of the multi-cavity unipolar plate (1), the multi-cavity unipolar plate (1) comprises an anode surface (15) and a cathode surface (16) which are oppositely arranged, the communication block (22) comprises a first communication block (222) arranged on the anode surface (15) and a second communication block (223) arranged on the cathode surface (16), the first communication block (222) is provided with a first runner (222 a), the second communication block (223) is provided with a second runner (223 a), and the cavity opening (131) of the first cavity opening area (132) is communicated with the flow field area (12) through the first runner (222 a), the second through hole (141) and the second runner (223 a);
the projections of the first flow channel (222 a) and the second flow channel (223 a) along the thickness direction of the multi-cavity unipolar plate (1) are at least partially non-overlapping.
5. The multi-cavity unipolar plate of claim 4, wherein the first cavity port region (132) includes a water inlet cavity port region (132 a) and a water outlet cavity port region (132 b), the first flow channels (222 a) opening toward the flow field region (12) at the water inlet cavity port region (132 a) and the water outlet cavity port region (132 b) to communicate the second through holes (141) with the flow field region (12).
6. The multi-cavity unipolar plate according to claim 5, characterised in that in the water inlet cavity mouth zone (132 a) the inlet of the first flow channel (222 a) is aligned with the second through hole (141) in the thickness direction of the multi-cavity unipolar plate (1) and in the water outlet cavity mouth zone (132 b) the outlet of the first flow channel (222 a) is aligned with the second through hole (141) in the thickness direction of the multi-cavity unipolar plate (1).
7. The multi-cavity unipolar plate of claim 4, wherein the first cavity region (132) includes a hydrogen-out cavity region (132 c), the first flow channel (222 a) opening toward the cavity (131) of the hydrogen-out cavity region (132 c) at the hydrogen-out cavity region (132 c) to communicate the second through-hole (141) with the cavity (131) of the hydrogen-out cavity region (132 c).
8. The multi-chamber unipolar plate of claim 7, wherein the inlet of the first flow channel (222 a) is aligned with the second through-hole (141) along the thickness of the multi-chamber unipolar plate (1) at the hydrogen outlet port area (132 c).
9. The multi-cavity unipolar plate of claim 4, wherein the second communication block (223) includes a communication plate (224), the communication plate (224) being located between the respective cavity port (131) and the flow field zone (12), the second flow channel (223 a) extending through the communication plate (224) of the second communication block (223) along the length of the multi-cavity unipolar plate (1);
along the length direction of the multi-cavity unipolar plate (1), one side of the first flow channel (222 a) is provided with an opening, and the other side is not provided with an opening.
10. A multi-cavity unipolar plate according to claim 3, characterised in that at least part of the block (23) is in engagement with the flow field region (12) along the length of the multi-cavity unipolar plate (1).
11. Multi-cavity unipolar plate according to any of claims 1-10, characterised in that the plate body (11) includes a first mounting groove (17), the first mounting groove (17) being for mounting the spacer block (2).
12. An electrolytic tank for electrolytic hydrogen production, characterized in that the electrolytic tank for electrolytic hydrogen production comprises a proton exchange membrane and a multi-cavity unipolar plate (1) which are arranged in a stacked manner, wherein the multi-cavity unipolar plate (1) is the multi-cavity unipolar plate (1) according to any one of claims 1-11, and the proton exchange membrane is arranged between adjacent multi-cavity unipolar plates (1).
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| CN202311203524.6A CN116949475B (en) | 2023-09-18 | 2023-09-18 | Multi-cavity unipolar plate and electrolytic tank for electrolytic hydrogen production |
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