CN220253277U - Turbulent flow type flow field plate of fuel cell - Google Patents
Turbulent flow type flow field plate of fuel cell Download PDFInfo
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- CN220253277U CN220253277U CN202322664502.1U CN202322664502U CN220253277U CN 220253277 U CN220253277 U CN 220253277U CN 202322664502 U CN202322664502 U CN 202322664502U CN 220253277 U CN220253277 U CN 220253277U
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- flow
- flow field
- field plate
- fuel cell
- turbulent
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- 239000000446 fuel Substances 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 8
- 239000003566 sealing material Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000003487 electrochemical reaction Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000012495 reaction gas Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000011664 nicotinic acid Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005457 optimization 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
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002351 wastewater 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 discloses a turbulent flow type flow field plate of a fuel cell, which comprises a flow field plate and a turbulent flow mechanism, wherein the turbulent flow mechanism comprises a plurality of turbulent flow blocks, the plurality of turbulent flow blocks are distributed on the surface of the flow field plate in an alternating lattice mode, the flow field on the surface of the flow field plate can be divided into a plurality of flow channels by the plurality of turbulent flow blocks, the turbulent flow blocks are used for blocking air flow to form air flow disturbance, and the surface of the turbulent flow blocks is provided with a plurality of different slopes for changing pressure intensity when the air flow flows. The utility model utilizes the streamline structure of the semi-water drop-shaped spoiler surface, can reduce the resistance of fluid flow, helps the liquid water to be discharged out of the flow field more easily, avoids 'flooding', forms air flow disturbance on the air in the flow field, and especially can promote the reaction air to enter the GDL and diffuse to the electrode surface rapidly by the vertical component force in the direction vertical to the plane of the flow field caused by the spoiler, thereby accelerating the progress of electrochemical reaction and further improving the output performance of the fuel cell.
Description
Technical Field
The utility model relates to the technical field of fuel cell flow field plates, in particular to a turbulent flow type flow field plate of a fuel cell.
Background
In recent decades, hydrogen fuel cells have evolved rapidly, and have become one of the most promising clean energy sources to replace traditional fossil fuels. A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electric energy. The fuel cell has the advantages of high energy efficiency, small pollution, low noise, long service life, stable performance and the like, and becomes one of the most interesting new energy subjects in the energy field.
However, conventional fuel cells suffer from poor mass transfer performance and "flooding" at high current densities. This is a major problem that severely affects further commercialization of fuel cells. In the existing solution, the reasonable flow field design can effectively promote the uniform distribution of the reaction gas on the electrode surface, improve the fuel utilization rate, relieve the problem of flooding in the flow channel under high current density, and further improve the output performance of the fuel cell.
In the existing flow field plate structure optimization design work, a three-dimensional flow field with a complex structure is mostly adopted, so that the processing difficulty is high, the cost is high, and larger pressure loss is often brought, so that the net power density of the flow field is low. The Chinese patent publication No. CN111584897B discloses a renewable fuel cell oxygen electrode flow field plate based on a three-dimensional bionic structure and a cell structure, and the renewable fuel cell oxygen electrode flow field plate comprises an oxygen electrode flow field plate, a hydrogen electrode flow field plate, a membrane electrode, an oxygen electrode diffusion layer and a hydrogen electrode diffusion layer. On one hand, the application adopts a more ordinary punctiform flow field, so that the turbulence effect brought by the punctiform flow field is limited, and on the other hand, the application adopts a three-dimensional flow field with a complex structure, and the design can solve the above problem, but can lead to the improvement of production cost and difficulty, so that the application lacks a certain practical use effect.
Disclosure of Invention
The utility model aims to provide a fuel cell turbulence flow field plate, which mainly solves the technical problem of achieving sufficient turbulence effect by using a simple structural design.
In order to achieve the above object, the technical solution of the embodiment of the present utility model is as follows:
the flow field of the surface of the flow field plate can be divided into a plurality of flow channels by the plurality of turbulence blocks, the turbulence blocks are used for blocking air flow to form air flow turbulence, and the surface of the turbulence blocks is provided with a plurality of different slopes for changing pressure intensity when the air flow flows through.
Further, the vortex blocks are uniformly distributed in the middle area of the flow field plate, the vortex blocks between two adjacent rows are staggered, the outer parts of the vortex blocks are smooth and round surfaces, the vortex blocks are in a semi-water drop shape, and each vortex block comprises a gentle front surface and a steep rear surface.
Further, the flow field on the flow field plate is divided into a primary flow channel and a secondary flow channel, the primary flow channel comprises an inlet primary flow channel and an outlet primary flow channel which are arranged on two sides of the surface of the flow field plate and have deeper depth, and the secondary flow channel is composed of a plurality of flow channels distributed in the middle area of the flow field plate.
Further, an air inlet and an air outlet are respectively arranged at two ends of the diagonal line of the flow field plate, an air inlet bolt hole and an air outlet bolt hole are respectively arranged at the air inlet and the air outlet of the plate body of the flow field plate, and the air inlet and the air outlet correspond to the air inlet main runner and the air outlet main runner respectively.
Further, a sealing gasket groove is formed in the outer side of the spoiler on the surface of the flow field plate, and the sealing gasket groove is used for filling sealing materials and improving sealing effect.
Further, a plurality of tightening bolt holes are formed in the surface of the flow field plate at equal intervals at the outer side of the sealing gasket groove, and the tightening bolt holes are used for installing tightening bolts.
Further, the top end of the spoiler is fixedly connected with a dorsal fin which is in a triangle with a narrow front and a thick front and a wide front, and the dorsal fin is used for dividing air flow and forming vortex in a diversion area at the back of the dorsal fin.
The utility model has the beneficial effects that:
1. the utility model utilizes the streamline structure of the semi-water drop-shaped spoiler surface, can reduce the resistance of fluid flow, helps the liquid water to be discharged out of the flow field more easily, avoids 'water flooding', forms air flow disturbance on the air in the flow field, and especially can promote the reaction air to enter the GDL and rapidly diffuse to the electrode surface, and accelerates the electrochemical reaction, thereby improving the output performance of the fuel cell.
2. The utility model is based on a punctiform flow field, has the characteristic of small pressure drop, has the advantage of simple structure compared with the existing complex bionic structure, has small processing difficulty and low processing cost, and further has the possibility of commercial use of the flow field plate of the fuel cell.
Drawings
Fig. 1 is a perspective view of a turbulent flow type flow field plate of a fuel cell in embodiment 1 of the present application;
fig. 2 is a top view of a turbulent flow field plate of a fuel cell according to embodiment 1 of the present application;
FIG. 3 is a front view of a spoiler-type flow field plate of a fuel cell according to embodiment 1 of the present application;
FIG. 4 is a rear view of a spoiler-type flow field plate of a fuel cell according to embodiment 1 of the present application;
fig. 5 is a perspective view of a spoiler-type flow field plate of a fuel cell in embodiment 2 of the present application.
Reference numerals illustrate:
1-flow field plate, 2-flow channel, 3-air inlet bolt hole, 4-air outlet bolt hole, 5-sealing gasket groove, 6-tightening bolt hole, 7-air inlet, 8-air outlet, 9-air inlet main runner, 10-outlet main runner, 11-spoiler, 1101-back fin, 12-front surface, 13-back surface.
Detailed Description
The technical scheme of the utility model is further elaborated below by referring to the drawings in the specification and the specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. In the following description, reference is made to the expression "some embodiments" which describe a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or a different subset of all possible embodiments and may be combined with each other without conflict.
It will be appreciated that the materials described in the embodiments of the present utility model, unless otherwise specified, are available from normal commercial sources. In the present utility model, terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "both sides", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. When the placement of the manifold is changed, the corresponding orientation and description of the top and bottom will also be changed according to the change of the placement, and the present utility model will not be repeated here.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Example 1
Referring to fig. 1-4, the present embodiment provides a flow field plate of a fuel cell, including a flow field plate 1 and a flow disturbing mechanism, the flow disturbing mechanism includes a plurality of flow disturbing blocks 11, the plurality of flow disturbing blocks 11 are distributed on the surface of the flow field plate 1 in a staggered lattice, and the plurality of flow disturbing blocks 11 can divide the flow field on the surface of the flow field plate 1 into a plurality of flow channels 2, that is, the flow field center area of the flow field plate 1 is uniformly and alternately formed by a plurality of semi-water drop-shaped flow disturbing blocks 11, and a plurality of flow channels 2 are obtained in this way, the flow disturbing blocks 11 are used for blocking air flow to form air flow disturbance, and the surface of the flow disturbing blocks 11 has a plurality of different slopes for changing pressure when the air flow passes through. The spoiler 11 is uniformly distributed in the middle area of the flow field plate 1, the spoiler 11 between two adjacent rows is staggered, the outer part of the spoiler 11 is a smooth and round surface, the spoiler 11 is in a semi-water drop shape (the semi-water drop shape is the shape of any object obtained by cutting a complete water drop shape object into two parts by taking an axis as a cutting line), the spoiler 11 comprises a gentle front surface 12 and a steep rear surface 13, reaction gas firstly passes through the rear surface 13 of the spoiler 11 and then passes through the front surface 12, when the gas passes through the steeper rear surface 13, the gas flow is accelerated because the resistance brought by the steep surface is overcome by the gas flow, and when the gas flow reaches the steeper front surface 12, the flow speed is correspondingly reduced and higher pressure is formed because of less resistance, and the gas is adsorbed to the surface of the spoiler 11 at the moment so as to be forced to accelerate, thereby being beneficial to the exhaust of waste gas and liquid water.
The flow field on the flow field plate 1 is divided into a main flow channel and a secondary flow channel, the main flow channel comprises an inlet main flow channel 9 and an outlet main flow channel 10 which are arranged on two sides of the surface of the flow field plate 1 and have deeper depth, and the secondary flow channel is composed of a plurality of flow channels 2 distributed in the middle area of the flow field plate 1. The two ends of the diagonal line of the flow field plate 1 are respectively provided with an air inlet 7 and an air outlet 8, the plate body of the flow field plate 1 is respectively provided with an air inlet bolt hole 3 and an air outlet bolt hole 4 at the air inlet 7 and the air outlet 8, the air inlet 7 and the air outlet 8 respectively correspond to an air inlet main runner 9 and an outlet main runner 10, the air inlet 7 is filled with reaction gas through the air inlet bolt hole 3, the reaction gas is distributed into the runner 2 in the central area of the flow field through the air inlet main runner 9, then the air outlet 8 is converged through the air outlet main runner 10, and then the waste gas and water are discharged through the air outlet bolt hole 4.
The surface of the flow field plate 1 is provided with a sealing gasket groove 5 at the outer side of the spoiler 11, and the sealing gasket groove 5 is used for filling sealing materials and improving sealing effect. The surface of the flow field plate 1 is provided with a plurality of tightening bolt holes 6 at equal intervals at the outer side of the sealing gasket groove 5, and the tightening bolt holes 6 are used for installing tightening bolts. The flow field plate is provided with a plurality of fillets for reducing mechanical damage caused by mechanical stress concentration.
Example 2
Referring to fig. 5, in this embodiment, in comparison with embodiment 1, in order to further ensure the turbulence effect, the top end of the turbulence block 11 is fixedly connected with a back fin 1101, the back fin 1101 is in a triangle shape with a narrow front and a thick front, and the back fin 1101 is used for separating or shearing the airflow and forms a vortex in the splitting area at the back of the back fin 1101, and the vortex can generate disturbance and shearing on the airflow so as to influence the flow of the surrounding airflow, thereby further ensuring the turbulence effect.
The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. The scope of the utility model is to be determined by the appended claims.
Claims (7)
1. The utility model provides a fuel cell disturbed flow type flow field board, includes flow field board (1) and vortex mechanism, its characterized in that, vortex mechanism includes a plurality of vortex piece (11), and a plurality of vortex piece (11) are the surface of staggered dot matrix type distribution at flow field board (1), and a plurality of vortex piece (11) can separate the flow field on flow field board (1) surface into a plurality of runner (2), vortex piece (11) are used for blockking the air current and form the air current disturbance, and the surface of vortex piece (11) has a plurality of different slopes that are used for changing the pressure when the air current flows through.
2. The turbulent flow type flow field plate according to claim 1, wherein the turbulent flow blocks (11) are uniformly distributed in the middle area of the flow field plate (1), the turbulent flow blocks (11) between two adjacent rows are staggered, the outer parts of the turbulent flow blocks (11) are smooth and round surfaces, the turbulent flow blocks (11) are in a semi-water drop shape, and the turbulent flow blocks (11) comprise a gentle front surface (12) and a steep rear surface (13).
3. A flow field plate of the turbulent flow type for a fuel cell according to claim 1, wherein the flow field on the flow field plate (1) is divided into a primary flow channel and a secondary flow channel, the primary flow channel comprises an inlet primary flow channel (9) and an outlet primary flow channel (10) which are arranged on both sides of the surface of the flow field plate (1) and have deeper depths, and the secondary flow channel is composed of a plurality of flow channels (2) distributed in the middle area of the flow field plate (1).
4. A flow field plate for a fuel cell according to claim 3, characterized in that the flow field plate (1) is provided with an air inlet (7) and an air outlet (8) at two ends of the diagonal line, respectively, and the plate body of the flow field plate (1) is provided with an air inlet bolt hole (3) and an air outlet bolt hole (4) at the air inlet (7) and the air outlet (8), respectively, and the air inlet (7) and the air outlet (8) correspond to an air inlet main runner (9) and an outlet main runner (10), respectively.
5. A fuel cell turbulence type flow field plate according to claim 1, characterized in that the surface of the flow field plate (1) is provided with a sealing gasket groove (5) at the outer side of the turbulence block (11), the sealing gasket groove (5) being used for filling sealing material and improving sealing effect.
6. The turbulent flow type flow field plate for fuel cell according to claim 5, characterized in that the surface of the flow field plate (1) is provided with a plurality of tightening bolt holes (6) at equal intervals at the outer side of the sealing gasket groove (5), and the tightening bolt holes (6) are used for installing tightening bolts.
7. The turbulent flow field plate for fuel cell according to claim 1, wherein the top end of the turbulent flow block (11) is fixedly connected with a back fin (1101), the back fin (1101) has a triangle shape with a narrow front and a thick front, and the back fin (1101) is used for dividing the air flow and forming a vortex in the flow dividing area at the back of the back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322664502.1U CN220253277U (en) | 2023-10-07 | 2023-10-07 | Turbulent flow type flow field plate of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322664502.1U CN220253277U (en) | 2023-10-07 | 2023-10-07 | Turbulent flow type flow field plate of fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220253277U true CN220253277U (en) | 2023-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322664502.1U Active CN220253277U (en) | 2023-10-07 | 2023-10-07 | Turbulent flow type flow field plate of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220253277U (en) |
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2023
- 2023-10-07 CN CN202322664502.1U patent/CN220253277U/en active Active
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