CN219832708U - Fuel cell circular flow field composed of sector flow fields - Google Patents
Fuel cell circular flow field composed of sector flow fields Download PDFInfo
- Publication number
- CN219832708U CN219832708U CN202321245404.8U CN202321245404U CN219832708U CN 219832708 U CN219832708 U CN 219832708U CN 202321245404 U CN202321245404 U CN 202321245404U CN 219832708 U CN219832708 U CN 219832708U
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- Prior art keywords
- flow field
- bipolar plate
- fuel cell
- flow
- fan
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- 239000000446 fuel Substances 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 16
- 238000005192 partition Methods 0.000 description 7
- 239000012495 reaction gas Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance 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
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
Abstract
The utility model provides a fuel cell circular flow field composed of a fan-shaped flow field, comprising: the bipolar plate, the inside of bipolar plate is provided with a plurality of first runners, and air inlet, wash port and exhaust hole have been seted up respectively to the both ends of bipolar plate, and the inside central point of bipolar plate has been seted up the water vapor exhaust runner, and the second runner sets up in the inside of first runner, and a plurality of baffles set up respectively in the inside of bipolar plate and are located the both sides of a plurality of first runners, and a plurality of fan-shaped flow fields set up respectively in the inside of bipolar plate. The fuel cell circular flow field formed by the fan-shaped flow fields is characterized in that the basic unit in the novel fuel cell circular flow field is an independent fan-shaped flow field, the reaction of the independent fan-shaped flow field and the discharge of water vapor are not affected, the fan-shaped wave structure is beneficial to balancing the air pressure of the flow field and is beneficial to the gas diffusion and the discharge of the reaction party, the shape and the size of the flow channel can be adjusted according to actual needs, and the fan-shaped discrete structure is convenient to produce and maintain.
Description
Technical Field
The utility model relates to the fields of fluid mechanics, industrial concern, fuel cells and the like, in particular to a fuel cell circular flow field formed by a fan-shaped flow field.
Background
The fuel cell is a cell which generates electric energy by utilizing chemical reaction of fuel (such as hydrogen, methane and the like) and oxygen, in the fuel cell, the fuel and the oxygen are separated through electrolyte, electrons and positive ions are generated by the chemical reaction, the electrons are transmitted through an external circuit, the positive ions are transmitted through the electrolyte, the ions migrate to an anode through the electrolyte under the action of an electric field and react with fuel gas to form a loop to generate electric current, meanwhile, the fuel cell also generates certain heat due to the electrochemical reaction of the fuel cell and the internal resistance of the cell, and the fuel cell converts Gibbs free energy in the chemical energy of the fuel into electric energy through the electrochemical reaction without being limited by a Carnot cycle effect, so that the efficiency is close to 100% theoretically; in addition, fuel cells use fuel and oxygen as raw materials and have no mechanical transmission parts, so that the discharged harmful gas is very little, the service life is long, and the fuel cells are the most promising power generation technology from the viewpoints of saving energy and protecting ecological environment.
The bipolar plate is one of key components of the fuel cell, has the functions of separating and distributing fuel and oxidant, preventing gas from permeating, collecting and conducting current, managing water and supporting structure, and the fuel conversion efficiency of the fuel cell depends on the flow field design of the bipolar plate, and the fuel distribution is required to be uniform, and the reaction water is required to be in a gas transmission flow field and the like.
An ideal fuel cell flow field structure can uniformly distribute fuel, reaction gas and production water gas can be effectively discharged, the currently developed fuel cell flow field comprises a parallel flow field, a serpentine flow field, an interdigital flow field, a radial flow field and the like, the distribution of a commercially applied metal plate flow field tends to be simplified based on the light weight, the miniaturization, the manufacturing cost, the quality control and the like of a cell, a parallel straight flow channel beneficial to water discharge is improved into a parallel wavy micro-flow channel flow field so as to promote the gas to be fully diffused, a punctiform flow field, a radial micro-flow channel and the like are adopted in a gas distribution area to obtain a composite flow field, the distribution uniformity of the gas flow is improved, the radial flow field disclosed in a patent CN111370726A can be used for improving the gas distribution in a limited manner, and the grid structure flow field disclosed in a patent CN206194865U is not beneficial to the discharge of product water.
Therefore, it is necessary to provide a fuel cell circular flow field composed of a sector flow field to solve the above technical problems.
Disclosure of Invention
The utility model provides a fuel cell circular flow field formed by a fan-shaped flow field, which solves the problems of the prior fuel cell flow field structure, and the uneven dispersion of gas in the flow field caused by the balance of the air pressure in the flow field.
In order to solve the technical problems, the present utility model provides a fuel cell circular flow field composed of a sector flow field, comprising:
the bipolar plate is internally provided with a plurality of first flow channels, two ends of the bipolar plate are respectively provided with an air inlet, a water drain hole and an air exhaust hole, and the central position of the bipolar plate is internally provided with a water and air exhaust flow channel;
a second flow passage provided inside the first flow passage;
the plurality of separators are respectively arranged in the bipolar plate and positioned at two sides of the plurality of first flow channels;
the fan-shaped flow fields are respectively arranged in the bipolar plate.
Preferably, the radial direction of the second flow channel is of a wave-shaped structure, and the horizontal heights of the wave-shaped structures are consistent.
Preferably, the first flow passage is inclined downward by 0-2 ° from the drain opening at the edge position to the center.
Preferably, the second flow channel is higher than the first flow channel.
Preferably, a connecting component is arranged between the bipolar plate and the partition plate, the connecting component comprises a through hole, a threaded rod is arranged in the through hole, and a thread sleeve is connected to the surface of the threaded rod in a threaded manner.
Preferably, both sides of the bottom of the partition plate are connected with sealing blocks, and sealing grooves matched with the sealing blocks are formed in the surfaces of the bipolar plates.
Compared with the related art, the fuel cell circular flow field formed by the sector flow fields has the following beneficial effects:
the utility model provides a fuel cell circular flow field composed of a fan-shaped flow field, wherein the basic unit in the novel fuel cell circular flow field is an independent fan-shaped flow field, the reaction of the independent fan-shaped flow field and the discharge of water vapor are not affected, the fan-shaped wave structure is beneficial to balancing the air pressure of the flow field and is beneficial to the gas diffusion and the discharge of the reaction, the shape and the size of the flow channel can be adjusted according to actual needs, and the fan-shaped discrete structure is convenient for production and maintenance.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of a circular flow field of a fuel cell composed of a sector flow field according to the present utility model;
FIG. 2 is a schematic view of the interior of the bipolar plate shown in FIG. 1;
fig. 3 is a left side view of the bipolar plate shown in fig. 2;
fig. 4 is a right side view of the bipolar plate shown in fig. 2;
FIG. 5 is a schematic view of the structure of the inside of the flow channel;
fig. 6 is a schematic structural diagram of a second embodiment of a circular flow field of a fuel cell composed of a sector flow field according to the present utility model;
fig. 7 is an enlarged schematic view of the portion a shown in fig. 6.
Reference numerals in the drawings: 1. the device comprises an air inlet, 2, a first runner, 3, a second runner, 4, a sector flow field, 5, a partition plate, 6, a drain hole, 7, an exhaust hole, 8, a connecting component, 81, a through hole, 82, a threaded rod, 83, a threaded sleeve, 84, a sealing block, 85, a sealing groove, 9, a bipolar plate, 10 and a water and air exhaust runner.
Detailed Description
The utility model will be further described with reference to the drawings and embodiments.
First embodiment
Referring to fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5 in combination, fig. 1 is a schematic structural diagram of a first embodiment of a circular flow field of a fuel cell formed by a fan-shaped flow field according to the present utility model; FIG. 2 is a schematic view of the interior of the bipolar plate shown in FIG. 1; fig. 3 is a left side view of the bipolar plate shown in fig. 2; fig. 4 is a right side view of the bipolar plate shown in fig. 2; fig. 5 is a schematic view of the structure of the inside of the flow channel. A fuel cell circular flow field comprised of sector flow fields, comprising:
the bipolar plate 9, a plurality of first runners 2 are arranged in the bipolar plate 9, an air inlet 1, a drain hole 6 and an exhaust hole 7 are respectively formed in two ends of the bipolar plate 9, and a water vapor exhaust runner 10 is formed in the center of the bipolar plate 9;
a second flow passage 3, wherein the second flow passage 3 is arranged inside the first flow passage 2;
a plurality of separators 5, wherein the separators 5 are respectively arranged inside the bipolar plate 9 and are positioned at two sides of the first flow passages 2;
a plurality of sector flow fields 4, wherein the plurality of sector flow fields 4 are respectively arranged inside the bipolar plate 9.
The radial direction of the second flow passage 3 is of a wave-shaped structure, and the horizontal height of the wave-shaped structure is consistent.
The first flow channel 2 is inclined downwardly from the outlet opening at the edge position to the center by 0-2 deg..
The second flow channel 3 is higher than the first flow channel 2.
The bipolar plate comprises an air inlet 1, a first flow channel 2, a second flow channel 3, fan-shaped flow fields 4, a partition plate 5, drain holes 6, exhaust holes 7 and a water vapor drain flow channel 10, wherein the air inlet 1 is positioned at the edge of the whole smooth structure, and each fan-shaped flow field corresponds to one air inlet, one air flow channel, one group of water flow channels, one exhaust hole and one drain hole. The water vapor discharge flow path 10 is a common flow path of the upper and lower laminar flow fields.
The basic unit of the circular flow field is a sector flow field;
the water vapor discharge flow channel is positioned in the center of the whole flow field result and is also the water vapor discharge flow channel of all bipolar plates; the gas flow channels are arranged at the top of the wavy rib plate and have the same height;
the second flow channel 3 is higher than the first flow channel 2;
the exhaust port is positioned at the upper part and the water outlet is positioned at the lower part.
Each fan-shaped flow field corresponds to one air inlet 1, and the air inlet 1 can be used for independently supplying air or a plurality of air holes are connected in parallel for supplying air. The inclination of the second flow channel 3 of the fan-shaped wave flow field for generating water and the width and the height of the first flow channel 2 of the reaction gas need to be calculated and adjusted through flow field mechanics so as to effectively drain water and balance air pressure. The staggered distribution of the gas flow channels is beneficial to the flow of the reaction gas.
The reaction gas enters the fan-shaped flow field from the gas inlet 1, and the reaction gas is diffused and reacted in the fan-shaped flow field from the outermost side of the fan shape, and the air pressure is balanced by the fan-shaped wave structure.
Finally, the remaining reaction gas is discharged from the first flow path 2 to the water and gas discharge flow path 10 through the exhaust hole 7, and the generated water is discharged from the second flow path 3 to the water and gas discharge flow path 10 through the exhaust hole 6.
Compared with the related art, the fuel cell circular flow field formed by the sector flow fields has the following beneficial effects:
the utility model provides a fuel cell circular flow field composed of a fan-shaped flow field, wherein the basic unit in the novel fuel cell circular flow field is an independent fan-shaped flow field, the reaction of the independent fan-shaped flow field and the discharge of water vapor are not affected, the fan-shaped wave structure is beneficial to balancing the air pressure of the flow field and is beneficial to the gas diffusion and the discharge of the reaction, the shape and the size of the flow channel can be adjusted according to actual needs, and the fan-shaped discrete structure is convenient for production and maintenance.
Second embodiment
Referring to fig. 6 and fig. 7 in combination, a fuel cell circular flow field composed of a sector flow field according to a first embodiment of the present utility model is provided, and a fuel cell circular flow field composed of another sector flow field is provided according to a second embodiment of the present utility model. The second embodiment is merely a preferred manner of the first embodiment, and implementation of the second embodiment does not affect the implementation of the first embodiment alone.
Specifically, the fuel cell circular flow field formed by the fan-shaped flow field provided by the second embodiment of the present utility model is different in that a connection component 8 is disposed between the bipolar plate 9 and the separator 5, the connection component 8 includes a through hole 81, a threaded rod 82 is disposed in the through hole 81, and a threaded sleeve 83 is screwed on the surface of the threaded rod 82.
Sealing blocks 84 are connected to two sides of the bottom of the partition board 5, and sealing grooves 85 matched with the sealing blocks 84 are formed in the surface of the bipolar plate 9.
The use of seal blocks 84 and seal grooves 85 seals the gap between separator plate 5 and bipolar plate 9 when they are connected.
The utility model provides a fuel cell circular flow field composed of a fan-shaped flow field, which has the following working principle:
when in use, when the partition plate 5 is disassembled, the threaded sleeve 83 on the surface of the threaded rod 82 is rotated to disassemble, and after the threaded sleeve 83 is disassembled, the partition plate 5 is pulled to drive the threaded rod 82 to be separated from the through hole 81 on the surface of the bipolar plate 9.
Compared with the related art, the fuel cell circular flow field formed by the sector flow fields has the following beneficial effects:
the utility model provides a fuel cell circular flow field composed of a fan-shaped flow field, wherein a connecting component 8 is arranged between a bipolar plate 9 and a separator 5, so that the separator 5 can be detached and cleaned after being used regularly.
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 technical fields are included in the scope of the present utility model.
Claims (6)
1. A fuel cell circular flow field comprising a sector flow field, comprising:
the bipolar plate is internally provided with a plurality of first flow channels, two ends of the bipolar plate are respectively provided with an air inlet, a water drain hole and an air exhaust hole, and the central position of the bipolar plate is internally provided with a water and air exhaust flow channel;
a second flow passage provided inside the first flow passage;
the plurality of separators are respectively arranged in the bipolar plate and positioned at two sides of the plurality of first flow channels;
the fan-shaped flow fields are respectively arranged in the bipolar plate.
2. The fuel cell circular flow field comprising a sector flow field according to claim 1, wherein the radial direction of the second flow channel is a wave-shaped structure, and the level of the wave-shaped structure is uniform.
3. The fuel cell circular flow field comprising a sector flow field according to claim 1, wherein the first flow channels slope downward from the edge location to the central drain opening by 0-2 °.
4. The fuel cell circular flow field composed of a sector flow field according to claim 1, wherein the second flow channel is higher in height than the first flow channel.
5. The fuel cell circular flow field composed of a fan-shaped flow field according to claim 1, wherein a connecting component is arranged between the bipolar plate and the separator, the connecting component comprises a through hole, a threaded rod is arranged in the through hole, and a threaded sleeve is connected to the surface of the threaded rod in a threaded manner.
6. The fuel cell circular flow field composed of the fan-shaped flow field according to claim 5, wherein two sides of the bottom of the separator are connected with sealing blocks, and sealing grooves matched with the sealing blocks are formed on the surface of the bipolar plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321245404.8U CN219832708U (en) | 2023-05-23 | 2023-05-23 | Fuel cell circular flow field composed of sector flow fields |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321245404.8U CN219832708U (en) | 2023-05-23 | 2023-05-23 | Fuel cell circular flow field composed of sector flow fields |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219832708U true CN219832708U (en) | 2023-10-13 |
Family
ID=88280290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321245404.8U Active CN219832708U (en) | 2023-05-23 | 2023-05-23 | Fuel cell circular flow field composed of sector flow fields |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219832708U (en) |
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2023
- 2023-05-23 CN CN202321245404.8U patent/CN219832708U/en active Active
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| GR01 | Patent grant |