CN113851668A - Wave-shaped flow field structure of proton exchange membrane fuel cell - Google Patents
Wave-shaped flow field structure of proton exchange membrane fuel cell Download PDFInfo
- Publication number
- CN113851668A CN113851668A CN202111272431.XA CN202111272431A CN113851668A CN 113851668 A CN113851668 A CN 113851668A CN 202111272431 A CN202111272431 A CN 202111272431A CN 113851668 A CN113851668 A CN 113851668A
- Authority
- CN
- China
- Prior art keywords
- shaped
- flow field
- fuel cell
- circular
- flow channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 28
- 239000012528 membrane Substances 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 2
- 210000000003 hoof Anatomy 0.000 claims 3
- 239000012495 reaction gas Substances 0.000 abstract description 13
- 239000007789 gas Substances 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000009827 uniform distribution Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 6
- 239000000376 reactant Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides a wave-shaped flow field structure of a proton exchange membrane fuel cell, which comprises an air inlet hole, a Y-shaped flow channel, a circular flow channel, a horseshoe-shaped rib plate, a rectangular flow channel, a polar plate and an air outlet hole, wherein the circular flow channel and the Y-shaped flow channel are both in wave-shaped structures and are alternately arranged, the air inlet hole is positioned in the center of the flow field structure, and the air outlet hole is uniformly distributed on the outermost side of the flow field. The reaction gas enters the flow field through the gas inlet and diffuses outwards layer by layer through the circular flow channel, the rectangular flow channel and the Y-shaped flow channel. Compared with the prior art, the fuel cell adopts the circular polar plate material, which is beneficial to promoting the uniform distribution of the reaction gas, the rectangular flow channel enhances the drainage performance of the flow field, the occurrence of flooding is effectively avoided, the wave-shaped structure enables the gas to be in forced convection, the component velocity is generated in the vertical direction, and the mass transfer efficiency and the power density of the fuel cell are improved.
Description
Technical Field
The invention relates to the field of fuel cells, in particular to a proton exchange membrane fuel cell wave-shaped flow field.
Background
A Proton Exchange Membrane Fuel Cell (PEMFC) is a fuel cell for converting chemical energy into electrical energy, and because of its characteristics of high energy conversion efficiency, cleanness, and high efficiency, compared with a heat engine, the fuel cell can directly convert chemical energy into electrical energy, and is not limited by carnot cycle, and the energy conversion efficiency can reach 90%. Is widely used today with increasing emphasis on environmental protection.
The bipolar plate is also called as a current collecting plate as one of core components of the fuel cell, and plays roles of distributing gas, collecting current and supporting a cell structure, a flow field is a concave-convex groove processed on the bipolar plate, the performance of the bipolar plate depends on the design of the flow field, and the proton exchange membrane fuel cell has better performance, so that on one hand, sufficient reactant supply is ensured, and on the other hand, water generated in the reaction process is timely discharged.
At present, the common types of fuel cells include a parallel flow field, a serpentine flow field and an interdigitated flow field, and the parallel flow field has the advantages of low manufacturing cost and low total pressure drop. However, when the flow field is too wide, water accumulation is easily formed, which causes a flooding phenomenon.
The serpentine flow field has the advantage of good drainage effect, because the single flow path can effectively promote the transmission of liquid water, but the pressure drop of the serpentine flow field is large, and the gas concentration distribution is easy to cause uneven.
The interdigitated flow field provides better water management than the parallel flow field and the serpentine flow field because the interdigitated flow field causes forced convection of the reactant gases in the diffusion layer, which also results in a large pressure drop.
Aiming at the defects of the prior art, a wave-shaped flow field of a proton exchange membrane fuel cell is provided.
Disclosure of Invention
The invention aims to provide a wave-shaped flow field of a proton exchange membrane fuel cell aiming at the defects of the conventional flow field, solve the defects of uneven distribution of reaction gas and poor drainage effect in the working process of the fuel cell and improve the current density of the proton exchange membrane fuel cell.
The technical scheme adopted by the invention is as follows: a proton exchange membrane fuel cell wave-shaped flow field is characterized in that: the device comprises an air inlet, a pole plate, a circular flow field, a Y-shaped flow channel, a rectangular flow channel, a horseshoe-shaped rib plate and an air outlet.
Further the inlet may be circular or square in shape and the outlet may be oval or rectangular in shape.
Further air inlets and trapezoidal rib plates are all processed on the polar plate. The air outlets are a plurality of and are distributed on the outermost side of the flow field in an annular mode at equal intervals.
The inner Y-shaped runner and the outer Y-shaped runner are arranged in a delta shape, and the outlet of the inner Y-shaped runner and the inlet of the outer Y-shaped runner are on the same straight line.
Further, rectangular runners are arranged at the bottoms of the trapezoidal rib plates, the rectangular runners under the same trapezoidal rib plate are distributed in parallel, and the number of the rectangular runners is determined according to the area of the polar plate.
The outlet of the Y-shaped flow channel at the outermost side and the outlet channel of the fuel cell are not in the same radial direction and are arranged in a staggered manner.
The longitudinal sections of the circular flow passage and the Y-shaped flow passage are wave-shaped curves, and the wave-shaped curves of the circular flow passage are designed by adopting a sine function Y-1-0.5 sin (pi x). The wave-shaped curve of the Y-shaped flow passage is designed by a sine function Y of 1-0.5 sin (3pi/4 x), and the number ratio of the main flow passage to the branch flow passages in the Y-shaped flow passage is 1: 2.
Compared with the prior art, the invention has the following advantages:
the invention relates to a wave-shaped flow field of a proton exchange membrane fuel cell, which adopts a mode that Y-shaped flow channels and circular flow channels are alternately distributed, so that the whole structure is firmer. The Y-shaped flow channel structure has the advantages that the longitudinal section area of the branch flow channel is reduced, the flowing speed of reactants is increased, and the diffusion mass transfer efficiency of the reactants is improved. The circular flow channel is beneficial to redistribution of reactants, and the reactant distribution uniformity is improved.
The flow field of the invention is circular, the air inlet channel is arranged at the center of a circle, and the reaction gas is diffused radially, so that the phenomenon of insufficient reaction gas caused by overlong flow channel when air is fed from one end is prevented, the hydrothermal management can be effectively carried out, the heat is spread from the center of a circle to the periphery, the water flows from the center of a circle to the periphery, and the hydrothermal distribution is more uniform. The air outlet channels are distributed on the outer side of the circular flow channel at equal intervals, so that the distribution uniformity of the reaction gas on the outer side of the polar plate can be effectively improved.
The invention adopts the wave-shaped flow passage, and the circular flow passage and the Y-shaped flow passage adopt different vibration angular frequencies, thereby avoiding the phenomenon of excessively fast change of gas diffusion speed.
The parallel rectangular flow channels are arranged at the bottoms of the hoof-shaped ribbed plates, so that the water accumulation under the ribs is avoided, the water produced by the ribs is favorably and quickly discharged, and the phenomena of flow channel blockage and water flooding are avoided.
The arc-shaped structure of the horseshoe-shaped rib plate is beneficial to reducing the resistance when gas passes through and reducing the pressure drop, thereby being beneficial to improving the current density.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the description will be briefly introduced below.
FIG. 1 is a three-dimensional schematic view of a wave-shaped flow field structure of a PEMFC according to the present invention
FIG. 2 is a three-dimensional schematic diagram of a wave-shaped flow field rib plate structure of a PEMFC according to the present invention
Drawing (A)
In the figure: 1. air inlet, 2, Y-shaped flow channel, 4, circular flow channel, 5, hoof-shaped ribbed plate, 3, air outlet 6, rectangular flow channel, 7 and polar plate material
Detailed Description
The present invention will be described in further detail with reference to the following examples and accompanying drawings. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
As shown in fig. 1, the corrugated flow field structure of the proton exchange membrane fuel cell is a circular structure and is axially symmetrically distributed, an air inlet (1) is arranged at the center of the flow field, an air outlet (3) is arranged at the outermost side of the flow field, Y-shaped runners and the circular runners are arranged in a staggered manner, one end of the innermost Y-shaped runner is connected with an air inlet channel, the other end of the innermost Y-shaped runner is connected with a circular channel, one end of the outermost circular channel is connected with the Y-shaped runner, and the other end of the outermost circular channel is connected with an air outlet channel.
Furthermore, the longitudinal cross-sectional area of the Y-shaped flow passage is gradually reduced, and the gradually reduced structure is favorable for ensuring the radial diffusion speed of the reaction gas.
And rectangular grooves which are parallel to each other are further formed at the lower ends of the hoof-shaped rib plates, so that the discharge of product water is facilitated, the accumulation of water can be effectively avoided, and the number of the rectangular channels can be determined according to the area of the polar plate.
Furthermore, the upper ends of the Y-shaped flow channel and the circular channel are both in a wave-shaped design, and the connection part of the Y-shaped flow channel and the circular channel is in smooth connection.
The working principle of the invention is as follows: reaction gas enters the whole flow field structure from the gas inlet, and begins to diffuse along the Y-shaped flow channel and the rectangular flow channel at the innermost side, and the gas diffuses from the main flow channel into the branch flow channel and then enters the circular flow channel in the Y-shaped flow channel diffusion process. In the rectangular flow passage diffusion process, the reaction gas directly passes through the rectangular flow passage from the gas inlet and is diffused to the circular flow passage. After the reaction gas is diffused into the innermost circular flow channel, the reaction gas is continuously diffused outwards into the adjacent outer Y-shaped channel and the rectangular channel, and the steps are repeated. The reaction gas is gradually diffused from the circle center to the periphery, and the generated liquid water and the residual reaction gas are discharged out of the flow field structure through the air outlet hole connected with the outermost side circular channel.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a proton exchange membrane fuel cell wave type flow field structure, its characterized in that, the flow field includes inlet port (1), Y type runner (2), circular runner (4), hoof shaped ribbed slab (5) and venthole (3), the distribution of hoof shaped ribbed slab (5) bottom has rectangle runner (6), the inlet port sets up in the centre of utmost point panel (7), the venthole sets up in the outer end of utmost point panel, the Y type flow field is alternate setting with circular flow field, inlet port (1), hoof shaped ribbed slab (5) and venthole (3) all process on utmost point panel and inlet port and venthole are continuous.
2. The pem fuel cell waveform flow field structure of claim 1, wherein said plate (7) is circular in overall shape.
3. The pem fuel cell waveform flow field structure of claim 1, wherein said ribs (5) are horseshoe-shaped.
4. The waveform flow field structure of proton exchange membrane fuel cell according to claim 1, wherein the longitudinal cross-sectional shapes of the Y-shaped flow channels (2) and the circular flow channels (4) are both wave-shaped curves.
5. The waveform flow field structure of proton exchange membrane fuel cell according to claim 1, wherein the maximum height of the Y-shaped flow channels (2) and the circular flow channels (4) is 1mm, the minimum height is 0.5mm, and the height of the rectangular flow channels is 0.2 mm. .
6. The waveform flow field structure of proton exchange membrane fuel cell according to claim 1, wherein the number of the Y-shaped flow channels (2) and the number of the circular flow channels (4) increase in a stepwise manner, and the specific number is related to the area of the plate material.
7. The pem fuel cell waveform flow field structure of claim 1, wherein the distance from said inlet to adjacent circular channels is the same as the distance between different adjacent channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111272431.XA CN113851668A (en) | 2021-10-29 | 2021-10-29 | Wave-shaped flow field structure of proton exchange membrane fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111272431.XA CN113851668A (en) | 2021-10-29 | 2021-10-29 | Wave-shaped flow field structure of proton exchange membrane fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113851668A true CN113851668A (en) | 2021-12-28 |
Family
ID=78983494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111272431.XA Pending CN113851668A (en) | 2021-10-29 | 2021-10-29 | Wave-shaped flow field structure of proton exchange membrane fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113851668A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656320A (en) * | 2009-09-04 | 2010-02-24 | 新奥科技发展有限公司 | Flow-field plate for electrochemical cell |
| CN102832399A (en) * | 2012-09-10 | 2012-12-19 | 武汉理工大学 | Ring fuel cell bipolar plate |
| US20140099570A1 (en) * | 2012-10-08 | 2014-04-10 | National Tsing Hua University | Fuel Directing Reaction Device for Passive Fuel Cell |
| CN206194865U (en) * | 2016-12-08 | 2017-05-24 | 中国石油大学(华东) | Fuel cell bipolar plate in web frame flow field |
| CN111370726A (en) * | 2020-03-17 | 2020-07-03 | 山东建筑大学 | Radial flow field structure of fuel cell |
| CN111613808A (en) * | 2020-06-16 | 2020-09-01 | 上海理工大学 | Bionic proton exchange membrane fuel cell structure based on spider web derivation |
| WO2021007678A1 (en) * | 2019-07-16 | 2021-01-21 | Harvey David B | Compact fuel cell modules and assemblies |
| CN214477554U (en) * | 2021-04-01 | 2021-10-22 | 百博(深圳)氢能源科技有限公司 | Fuel cell plate flow channel structure and fuel cell |
| CN215955330U (en) * | 2021-10-29 | 2022-03-04 | 山东建筑大学 | Wave-shaped flow field structure of proton exchange membrane fuel cell |
-
2021
- 2021-10-29 CN CN202111272431.XA patent/CN113851668A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656320A (en) * | 2009-09-04 | 2010-02-24 | 新奥科技发展有限公司 | Flow-field plate for electrochemical cell |
| CN102832399A (en) * | 2012-09-10 | 2012-12-19 | 武汉理工大学 | Ring fuel cell bipolar plate |
| US20140099570A1 (en) * | 2012-10-08 | 2014-04-10 | National Tsing Hua University | Fuel Directing Reaction Device for Passive Fuel Cell |
| CN206194865U (en) * | 2016-12-08 | 2017-05-24 | 中国石油大学(华东) | Fuel cell bipolar plate in web frame flow field |
| WO2021007678A1 (en) * | 2019-07-16 | 2021-01-21 | Harvey David B | Compact fuel cell modules and assemblies |
| CN111370726A (en) * | 2020-03-17 | 2020-07-03 | 山东建筑大学 | Radial flow field structure of fuel cell |
| CN111613808A (en) * | 2020-06-16 | 2020-09-01 | 上海理工大学 | Bionic proton exchange membrane fuel cell structure based on spider web derivation |
| CN214477554U (en) * | 2021-04-01 | 2021-10-22 | 百博(深圳)氢能源科技有限公司 | Fuel cell plate flow channel structure and fuel cell |
| CN215955330U (en) * | 2021-10-29 | 2022-03-04 | 山东建筑大学 | Wave-shaped flow field structure of proton exchange membrane fuel cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215955330U (en) | Wave-shaped flow field structure of proton exchange membrane fuel cell | |
| CN112133938A (en) | Fuel cell flow field plate and fuel cell | |
| CN112103531B (en) | Proton exchange membrane fuel cell bipolar plate based on symmetrical serpentine structure flow field | |
| CN110212214B (en) | Bipolar plate flow field structure in fuel cell and bipolar plate | |
| CN108155400B (en) | Fuel cell bipolar plate cooling flow field structure | |
| CN215220769U (en) | Bipolar plate of interdigitated variable cross-section flow channel structure of fuel cell | |
| CN112786913A (en) | Bipolar plate and fuel cell comprising same | |
| CN113555580A (en) | Polar plate for fuel cell pile | |
| CN111370726B (en) | Radial flow field structure of fuel cell | |
| CN112909285A (en) | Interdigitated variable cross-section flow channel structure of fuel cell and bipolar plate | |
| CN114204066A (en) | Tapered parallel snakelike runner structure and proton exchange membrane fuel cell | |
| CN210006824U (en) | Bipolar plate flow field structure and bipolar plate in fuel cells | |
| CN112038656A (en) | Fuel cell flow field plate and fuel cell | |
| CN113013437B (en) | Fuel cell cathode runner with gradually-reduced slope structure | |
| CN113851668A (en) | Wave-shaped flow field structure of proton exchange membrane fuel cell | |
| CN116646551A (en) | Double-slope gas flow passage structure for proton exchange membrane fuel cell | |
| CN215184082U (en) | Anode flow field of high-power proton exchange membrane fuel cell bipolar plate | |
| CN116826094A (en) | Flow guiding type porous flow passage for hydrogen fuel cell and bipolar plate structure | |
| CN212783524U (en) | Monopolar plate, bipolar plate and fuel cell | |
| CN114792821A (en) | Flow field plate of fuel cell | |
| CN115692759A (en) | Flow field structure of bipolar plate of fuel cell | |
| CN116314918A (en) | Proton exchange membrane fuel cell bipolar plate with reversed-phase wavy flow field | |
| CN112103526A (en) | Monopolar plate, bipolar plate and fuel cell | |
| CN211743309U (en) | Bipolar plate for testing power generation performance of membrane electrode of hydrogen fuel cell | |
| CN112086658A (en) | Fuel cell flow field plate and fuel cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |