CN101459246A - Leaf vein shaped fuel cell flow field plate - Google Patents
Leaf vein shaped fuel cell flow field plate Download PDFInfo
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- CN101459246A CN101459246A CNA2008101636837A CN200810163683A CN101459246A CN 101459246 A CN101459246 A CN 101459246A CN A2008101636837 A CNA2008101636837 A CN A2008101636837A CN 200810163683 A CN200810163683 A CN 200810163683A CN 101459246 A CN101459246 A CN 101459246A
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- flow field
- fuel cell
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- 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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Abstract
A vein-shaped fuel cell flow field plate comprises two flow field plates mutually joined, wherein a approximately square flow field area is arranged on the flow field plate, a sealing gasket is arranged on the periphery of the flow field area, a main vein for liquid flowing in extends along a diagonal line of the square, jointed veins for liquid flowing out are parallel to the edge of the square and are perpendicularly crossed at a liquid outlet, one end of each branch vein is connected with the main vein via a 45-degrees angle and is parallel to the edge of the square, and the other end is connected with the jointed veins via a vertical angle. The invention has the advantages that the flowing resistance of the liquid in the flow field plates can be smaller and more uniformly distributed, and gas generated during reaction can be exhausted via a shortest path.
Description
Technical field
The present invention relates to the device, particularly fuel cell flow field board of fluid mass-transfer in a kind of enhanced fuel battery.
Background technology
Fuel cell is a kind of device that directly chemical energy in the fuel is converted into electric energy.Battery flow-field plate or title pole plate are the vitals of fuel cell, mainly play distributing fluids (fuel and oxidant), conduction and support cells structure.At present, flat fuel cell flow field board mainly contains two kinds of snakelike and run-in indexs, with graphite as main base material.So fuel cell flow field board is more crisp, manufacturing cost is also than higher.At present, flat snakelike pole plate is used for various low-temperature fuel cells, and the run-in index pole plate is mainly used in the fuel cell that acts as a fuel with gas.
In direct methanol fuel cell and direct borohydride fuel cell, because the selfdecomposition of reactant can produce biphase gas and liquid flow in runner, increase flow resistance, what reduce electrode effectively utilizes area, brings adverse effect for the stable operation of battery.Serpentine flow can guarantee that the gas that produces in the runner is bound to be excluded, but flow resistance can be very high because have only a path from the outlet that enters the mouth, and little bubble is in long-distance flowing, can accumulate and become big, the degree of irregularity of biphase gas and liquid flow be aggravated, as shown in Figure 1; The parallel flow field flow resistance is smaller, but inhomogeneous because of each bar bypass flow Resistance Distribution, resistance general goal bubble is difficult to discharge, and easily blocking becomes " dead band ", as shown in Figure 2.
Summary of the invention
It is that the fuel cell flow field board flow resistance of liquid is big, fluid distribution is inhomogeneous and the shortcoming of gas-liquid two-phase separation difficulty that the present invention will overcome existing fuel, the fuel cell flow field board that provide that a kind of flow resistance is little, the gas that produces can be got rid of fast in course of reaction with the shortest path.
Fuel cell flow field board of the present invention, comprise two involutory flow-field plate, have on the described flow-field plate and roughly be foursquare flow field regions, the periphery of described flow field regions has seal washer, it is characterized in that: the master pulse of Liu Ruing extends along described foursquare diagonal for liquid, what flow out for liquid converges the outlet that arteries and veins is parallel to described foursquare limit and is vertically intersected on liquid, one end of each offshoot is 45 degree connections and parallel with described foursquare limit with described master pulse, and the other end is vertical angle and is connected with the described arteries and veins that converges.
Further, the width of described each offshoot and its being proportionate property of length.
Further, the bifurcation site of the offshoot of described master pulse both sides staggers mutually.
Further, the width of described master pulse exports gradually from entering the mouth to and successively decreases.
The vein structure that the present invention infuses with reference to leaf has designed the fuel battery pole board of vein shape, the problem of the gas-liquid two-phase separation difficulty that solution direct borohydride fuel cell and direct methanol fuel cell face.The flow-field plate that the branch shape of imitation vein designs.This new flow field plate has not only reduced flow resistance, and can make fluid distribution more even, and the gas that produces in course of reaction can be discharged fuel cell fast with the shortest path, thereby effectively improves the utilance of fuel and the power output of fuel cell.
Because short and thick flow passage resistance is little, long and thin flow passage resistance is big, in order to make the flow resistance uniformity of each offshoot, designs long runner wide, and short runner designs narrowly.
The offshoot bifurcation site of master pulse both sides is designed to incomplete symmetry, slight misalignment.This is because two offshoots of telling fully symmetrically can cause the variation of bifurcation geometry excessive, and flow resistance is risen.
The width of master pulse exports gradually from entering the mouth to and attenuates, and this is because close porch flow is big, and after master pulse was distributed to each offshoot gradually with flow, the flow of self was just little, so exit width minimum.
The invention has the beneficial effects as follows, can make fluid flow resistance therein littler, it is more evenly distributed, the gas that produces in course of reaction can be got rid of fast with the shortest path.
Description of drawings
Fig. 1 is the flow field structure figure of serpentine flow
Fig. 2 is the flow field structure figure of parallel flow field
Fig. 3 is flow field structure figure of the present invention
Fig. 4 is the schematic diagram of flow-field plate
Embodiment
With reference to accompanying drawing, further specify the present invention:
Fuel cell flow field board of the present invention, comprise two involutory flow-field plate, have on the described flow-field plate and roughly be foursquare flow field regions, the periphery of described flow field regions has seal washer 6, the master pulse 1 of Liu Ruing extends along described foursquare diagonal for liquid, what flow out for liquid converges the outlet 3 that arteries and veins 2 is parallel to described foursquare limit and is vertically intersected on liquid, one end of each offshoot 4 is 45 degree connections and parallel with described foursquare limit with described master pulse 111, and the other end is vertical angle and is connected with the described arteries and veins 2 that converges.
The width of described each offshoot 4 and its being proportionate property of length.
The bifurcation site of the offshoot 4 of described master pulse 1 both sides staggers mutually.
The width of described master pulse 153 successively decreases to outlet gradually from entering the mouth.
The vein structure that the present invention infuses with reference to leaf has designed the fuel battery pole board of vein shape, the problem of the gas-liquid two-phase separation difficulty that solution direct borohydride fuel cell and direct methanol fuel cell face.The flow-field plate that the branch shape of imitation vein designs.This new flow field plate has not only reduced flow resistance, and can make fluid distribution more even, and the gas that produces in course of reaction can be discharged fuel cell fast with the shortest path, thereby effectively improves the utilance of fuel and the power output of fuel cell.
Because short and thick flow passage resistance is little, long and thin flow passage resistance is big, in order to make the flow resistance uniformity of each offshoot, designs long runner wide, and short runner designs narrowly.
Offshoot 4 bifurcation site of master pulse 1 both sides are designed to incomplete symmetry, slight misalignment.This is because two offshoots of telling fully symmetrically can cause the variation of bifurcation geometry excessive, and flow resistance is risen.
The width of master pulse 153 attenuates to outlet gradually from entering the mouth, and this is because big near inlet 5 place's flows, and when master pulse 1 is distributed to each offshoot 4 gradually with flow after, the flow of self is just little, so exports 3 place's width minimums.
The invention has the beneficial effects as follows, can make fluid flow resistance therein littler, it is more evenly distributed, the gas that produces in course of reaction can be got rid of fast with the shortest path.
Described flow-field plate material can be electric conducting materials such as stainless steel, titanium alloy, graphite, nickel plate, copper coin.
This battery flow-field plate is mainly used in borohydride fuel battery, methanol fuel cell, alkaline fuel cell, hydrogen oxygen fuel cell etc. and acts as a fuel with hydrogen, methyl alcohol, ethanol, acetaldehyde etc., with the fuel cell as oxidant such as oxygen, hydrogen peroxide, air.
The described content of wood specification embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (5)
1, leaf vein shaped fuel cell flow field plate, comprise two involutory flow-field plate, have on the described flow-field plate and roughly be foursquare flow field regions, the periphery of described flow field regions has seal washer, it is characterized in that: the master pulse of Liu Ruing extends along described foursquare diagonal for liquid, what flow out for liquid converges the outlet that arteries and veins is parallel to described foursquare limit and is vertically intersected on liquid, one end of each offshoot is 45 degree connections and parallel with described foursquare limit with described master pulse, and the other end is vertical angle and is connected with the described arteries and veins that converges.
2, fuel cell flow field board as claimed in claim 1 is characterized in that: the width of described each offshoot and its being proportionate property of length.
3, fuel cell flow field board as claimed in claim 1 or 2 is characterized in that: the bifurcation site of the offshoot of described master pulse both sides staggers mutually.
4, fuel cell flow field board as claimed in claim 3 is characterized in that: the width of described master pulse exports gradually from entering the mouth to and successively decreases.
5, fuel cell flow field board as claimed in claim 4 is characterized in that: described flow-field plate material can be stainless steel, titanium alloy, graphite, nickel plate, copper coin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101636837A CN101459246B (en) | 2008-12-18 | 2008-12-18 | Leaf vein shaped fuel cell flow field plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101636837A CN101459246B (en) | 2008-12-18 | 2008-12-18 | Leaf vein shaped fuel cell flow field plate |
Publications (2)
| Publication Number | Publication Date |
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| CN101459246A true CN101459246A (en) | 2009-06-17 |
| CN101459246B CN101459246B (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101636837A Active CN101459246B (en) | 2008-12-18 | 2008-12-18 | Leaf vein shaped fuel cell flow field plate |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299343A (en) * | 2011-07-26 | 2011-12-28 | 武汉理工大学 | Leaf biomimetic structure based bipolar plate for proton exchange membrane fuel cells |
| CN104821407A (en) * | 2015-01-30 | 2015-08-05 | 浙江工业大学 | Vein-like fuel cell flow field structure, fuel cell bipolar plate, and fuel cell |
| CN108767288A (en) * | 2018-06-11 | 2018-11-06 | 西安交通大学 | A kind of tree-like fuel cell channel structure of variable cross-section |
| CN109326802A (en) * | 2018-10-31 | 2019-02-12 | 温州大学激光与光电智能制造研究院 | A kind of interdigitated dual polar plates of proton exchange membrane fuel cell of disc vein shape |
| CN109830704A (en) * | 2019-02-01 | 2019-05-31 | 广东电网有限责任公司 | Hydrogen fuel cell bipolar plates based on tree-shaped flow passage structure |
| CN109888351A (en) * | 2019-01-21 | 2019-06-14 | 西安交通大学 | A kind of tree-shaped uniform flow field flow battery and its working method |
| CN110085886A (en) * | 2019-05-21 | 2019-08-02 | 吉林大学 | A kind of fuel battery double plates and its method in bionical flow field |
| CN111244494A (en) * | 2018-11-28 | 2020-06-05 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for rectangular flow battery and application |
| TWI832454B (en) * | 2022-09-29 | 2024-02-11 | 崑山科技大學 | vein-type reorganizer |
-
2008
- 2008-12-18 CN CN2008101636837A patent/CN101459246B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299343A (en) * | 2011-07-26 | 2011-12-28 | 武汉理工大学 | Leaf biomimetic structure based bipolar plate for proton exchange membrane fuel cells |
| CN104821407A (en) * | 2015-01-30 | 2015-08-05 | 浙江工业大学 | Vein-like fuel cell flow field structure, fuel cell bipolar plate, and fuel cell |
| CN104821407B (en) * | 2015-01-30 | 2017-03-29 | 浙江工业大学 | Vein shape fuel cell flow field structure, fuel battery double plates and fuel cell |
| CN108767288A (en) * | 2018-06-11 | 2018-11-06 | 西安交通大学 | A kind of tree-like fuel cell channel structure of variable cross-section |
| CN109326802A (en) * | 2018-10-31 | 2019-02-12 | 温州大学激光与光电智能制造研究院 | A kind of interdigitated dual polar plates of proton exchange membrane fuel cell of disc vein shape |
| CN111244494A (en) * | 2018-11-28 | 2020-06-05 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for rectangular flow battery and application |
| CN111244494B (en) * | 2018-11-28 | 2023-07-21 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for rectangular flow battery and application |
| CN109888351A (en) * | 2019-01-21 | 2019-06-14 | 西安交通大学 | A kind of tree-shaped uniform flow field flow battery and its working method |
| CN109888351B (en) * | 2019-01-21 | 2021-03-12 | 西安交通大学 | Tree-shaped uniform flow field flow battery and working method thereof |
| CN109830704A (en) * | 2019-02-01 | 2019-05-31 | 广东电网有限责任公司 | Hydrogen fuel cell bipolar plates based on tree-shaped flow passage structure |
| CN110085886A (en) * | 2019-05-21 | 2019-08-02 | 吉林大学 | A kind of fuel battery double plates and its method in bionical flow field |
| CN110085886B (en) * | 2019-05-21 | 2021-11-02 | 吉林大学 | Fuel cell bipolar plate of bionic flow field and method thereof |
| TWI832454B (en) * | 2022-09-29 | 2024-02-11 | 崑山科技大學 | vein-type reorganizer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101459246B (en) | 2012-02-01 |
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