CN105742667A - Negative electrode flow field plate bionic structure capable of improving drainage performance of fuel cell - Google Patents
Negative electrode flow field plate bionic structure capable of improving drainage performance of fuel cell Download PDFInfo
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- CN105742667A CN105742667A CN201610244963.5A CN201610244963A CN105742667A CN 105742667 A CN105742667 A CN 105742667A CN 201610244963 A CN201610244963 A CN 201610244963A CN 105742667 A CN105742667 A CN 105742667A
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- field plate
- flow field
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- 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
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- 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
- H01M8/023—Porous and characterised by the material
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- 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
- H01M8/023—Porous and characterised by the material
- H01M8/0234—Carbonaceous material
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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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- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to the technical field of fuel cells, and specifically to a negative electrode flow field plate bionic structure capable of improving the drainage performance of a fuel cell. The bionic structure comprises an upper supporting layer, an outer gasket, a negative electrode flow field plate, an inner gasket, a lower supporting layer, a liquid-absorbing material, a negative electrode gas diffusion layer, a gasket and a negative electrode catalyst layer, wherein the outer gasket is arranged between the upper supporting layer and the negative electrode flow field plate; the inner gasket is arranged between the negative electrode flow field plate and the liquid-absorbing material; the negative electrode gas diffusion layer is arranged between the liquid-absorbing material and the negative electrode catalyst layer; and the gasket is arranged between the negative electrode flow field plate and the negative electrode catalyst layer. By adoption of the structure, the design of the bionic structure can better satisfy the bioengineering principle, so that the drainage speed of the fuel cell can be improved to a large extent; the bionic structure can be widely applied to fuel cells of multiple specifications; and a water-logging phenomenon in the fuel cell can be effectively prevented.
Description
Technical field
The present invention relates to field of fuel cell technology, refer in particular to a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance.
Background technology
The water management of fuel cell is all the principal element perplexing its performance boost all the time, pile up especially for fuel cell and when working under high current density, be susceptible in battery the phenomenon of " water logging ", this phenomenon has had a strong impact on the performance of fuel cell, what the water management in battery pile became in this state is more serious, it is thus desirable to adopt the water management improving in fuel cell in various manners to promote the service behaviour of fuel, as designed the methods such as different flow-field plate flow passage structures and the material that improves in battery, although these methods serve to a certain extent alleviates the degree of " water logging " in battery, but these methods are no longer applicable in the process that cell operating status changes, so seeking other more effective drainage measure to become particularly important.
Plant stomata transpiration produces scattering and disappearing of moisture, lures that mesophyll tissue produces core sucting action into, is formed relatively and the negative pressure of air at blade, and driving resin to be transported to blade from soil through root and conduit is the main drive driving moisture to be transported up.In plant growing, the transport of required moisture depends on " bio-pump " effect of self, there is the driving force being vertically sent in the blade from 100 meters of ground from root system by moisture (such as California fir, by tree etc.), the core of " bio-pump " long-time high-efficiency operation is the negative pressure-induced effect of the transpiration effect on blade and mesophyll tissue.In order to imitate the transpiration of pore on plant leaf blade, therefore this function on plant leaf blade is improved, and it is applied in the water management of fuel cell to carry out Bionic Design, so this patent by carrying out special Structure Improvement Design and utilization has this double grading of material of water absorption character to the cathode flow field plate of fuel cell, design this biomimetic features, this design is made to more conform to bionic principle, this version can improve the drainage speed of fuel cell to a great extent, this occurs the phenomenon of " water logging " and its service behaviour of raising significant for preventing fuel cell.
Summary of the invention
It is an object of the invention to provide a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance, its compact overall structure, practical, it is possible to be widely used in the fuel cell of plurality of specifications, and can effectively prevent water in fuel cell from flooding the biomimetic features design of phenomenon.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of cathode flow field plate biomimetic features improving fuel cell drainage performance, including upper supporting layer, outer washer, cathode flow field plate, inner washer, lower support layer, imbibition material, cathode gas diffusion layer, packing ring and cathode catalysis layer, outer washer is located between supporting layer and cathode flow field plate, inner washer is located between cathode flow field plate and imbibition material, cathode gas diffusion layer is located between imbibition material and cathode catalysis layer, and packing ring is located between cathode flow field plate and cathode catalysis layer.
Furthermore, described upper supporting layer is provided with some upper supporting layer bolts hole, upper supporting layer hollow-out layer, some upper supporting layer runners shoulder and upper supporting layer side wall gas exit, upper supporting layer hollow-out layer and imbibition material are correspondingly arranged, upper supporting layer hollow-out layer is provided with some upper supporting layer hollow outs, between some upper supporting layer runners shoulder, molding is provided with supporting layer gas flow, and upper supporting layer side wall gas exit is correspondingly arranged with outer washer, cathode flow field plate respectively.
Furthermore, described outer washer is provided with some outer washer bolts hole and outer washer side wall gas exit, and outer washer side wall gas exit connects setting with upper supporting layer side wall gas exit.
Furthermore, described cathode flow field plate is provided with some cathode flow field plate bolts hole, cathode flow field plate location shoulder, side-wall gas passage, extraneous gas runner, some extraneous gas runners are takeed on, areole entrance, cathode flow field plate side wall gas exit, internal gas runner is takeed on, internal gas runner shoulder end face and micropore, cathode flow field plate location shoulder is correspondingly arranged with lower support layer, cathode flow field plate side wall gas exit connects setting with upper supporting layer side wall gas exit, extraneous gas runner is located between cathode flow field plate location shoulder and extraneous gas runner shoulder, extraneous gas runner shoulder is correspondingly arranged with suction material, some extraneous gas runners shoulder top is provided with cathode flow field plate groove, some extraneous gas runners shoulder bottom is provided with internal gas runner, internal gas runner passes through side-wall gas channel connection in upper supporting layer gas flow.
Furthermore, described upper supporting layer, outer washer and cathode flow field plate are bolted to connection.
Furthermore, described lower support layer is provided with lower support layer groove and lower support layer hollow out, and lower support layer groove and imbibition material are correspondingly arranged.
Furthermore, described imbibition material includes liquid transpiration material, trunk imbibition material and root system imbibition material, root system imbibition material is located on trunk imbibition material, and trunk imbibition material is located on liquid transpiration material, and root system imbibition material is in the lower support layer groove of lower support layer.
The method have the benefit that
The present invention adopts such structure to arrange, this design is made to more conform to bionic principle, greatly enhance the drainage rates of fuel cell, it is possible to be widely used in the fuel cell of plurality of specifications, and can effectively prevent water in fuel cell from flooding the generation of phenomenon, in addition, do not changing on the basis of fuel cell cathode flow field plate original function, adding the additional functionality of flow-field plate, decreasing the additional auxiliary device of fuel cell, overall structure is simply compact, provides cost savings.
Accompanying drawing explanation
Fig. 1 is overall structure profile of the present invention；
Fig. 2 is upper supporting layer structure chart；
Fig. 3 is outer washer structure chart；
Fig. 4 is cathode flow field plate upper surface figure；
Fig. 5 is cathode flow field plate lower surface figure；
Fig. 6 is part A enlarged drawing in Fig. 5；
Fig. 7 is cathode flow field plate plane graph；
Fig. 8 is inner washer structure chart；
Fig. 9 is lower support Rotating fields figure；
Figure 10 imbibition material structure chart.
1, upper supporting layer；2, outer washer；3, cathode flow field plate；4, inner washer；5, lower support layer；6, imbibition material；7, cathode gas diffusion layer；8, packing ring；9, cathode catalysis layer；11, upper supporting layer bolt hole；12, upper supporting layer hollow-out layer；13, upper supporting layer hollow out；14, upper supporting layer gas flow；15, upper supporting layer runner shoulder；16, upper supporting layer side wall gas exit；21, outer washer bolt hole；22, outer washer side wall gas exit；31, cathode flow field plate bolt hole；32, cathode flow field plate location shoulder；33, side-wall gas passage；34, extraneous gas runner；35, cathode flow field plate groove；36, extraneous gas runner shoulder；37, internal gas runner；38, areole entrance；39, cathode flow field plate side wall gas exit；311, internal gas runner shoulder；312, internal gas runner shoulder end face；313, micropore；51, lower support layer groove；52, lower support layer hollow out；61, liquid transpiration material；62, trunk imbibition material；63, root system imbibition material.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, technical scheme is illustrated.
As shown in Figure 1, a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance of the present invention, including upper supporting layer 1, outer washer 2, cathode flow field plate 3, inner washer 4, lower support layer 5, imbibition material 6, cathode gas diffusion layer 7, packing ring 8 and cathode catalysis layer 9, outer washer 2 is located between supporting layer 1 and cathode flow field plate 3, inner washer 4 is located between cathode flow field plate 3 and imbibition material 6, cathode gas diffusion layer 7 is located between imbibition material 6 and cathode catalysis layer 9, and packing ring 8 is located between cathode flow field plate 3 and cathode catalysis layer 9.
The above constitutes basic structure of the present invention.
The present invention adopts such structure to arrange, this design is made to more conform to bionic principle, greatly enhance the drainage rates of fuel cell, it is possible to be widely used in the fuel cell of plurality of specifications, and can effectively prevent water in fuel cell from flooding the generation of phenomenon, in addition, do not changing on the basis of fuel cell cathode flow field plate original function, adding the additional functionality of flow-field plate, decreasing the additional auxiliary device of fuel cell, overall structure is simply compact, provides cost savings.Wherein, outer washer 2 plays the sealing function between supporting layer 1 and cathode flow field plate 3, and inner washer 4 plays the sealing function between cathode flow field plate 3 and imbibition material 6, and packing ring 8 plays the sealing function between cathode flow field plate 3 and cathode catalysis layer 9.
More specifically, as shown in Figure 2, described upper supporting layer 1 is provided with some upper supporting layer bolts hole 11, upper supporting layer hollow-out layer 12, some upper supporting layer runners shoulder 15 and upper supporting layer side wall gas exit 16, upper supporting layer hollow-out layer 12 is correspondingly arranged with imbibition material 6, upper supporting layer hollow-out layer 12 is provided with some upper supporting layer hollow outs 13, between some upper supporting layer runners shoulder 15, molding is provided with supporting layer gas flow 14, and upper supporting layer side wall gas exit 16 is correspondingly arranged with outer washer 2, cathode flow field plate 3 respectively.Upper supporting layer hollow-out layer 12 of the present invention plays the effect supporting fixing imbibition material 6, and upper supporting layer hollow out 13 plays gas permeable effect, the passage that upper supporting layer gas flow 14 flows as gas.
More specifically, as it is shown on figure 3, described outer washer 2 is provided with some outer washer bolts hole 21 and outer washer side wall gas exit 22, outer washer side wall gas exit 22 connects setting with upper supporting layer side wall gas exit 16.Outer washer 2 has sealing function, and outer washer side wall gas exit 22 connects as cathode flow field plate 3 passage with upper supporting layer side wall gas exit 16 so that it is internal residual gas is easy to flow out.
nullMore specifically，As shown in Fig. 4 to Fig. 8，Described cathode flow field plate 3 is provided with some cathode flow field plate bolts hole 31、Cathode flow field plate location shoulder 32、Side-wall gas passage 33、Extraneous gas runner 34、Some extraneous gas runners shoulder 36、Areole entrance 38、Cathode flow field plate side wall gas exit 39、Internal gas runner shoulder 311、Internal gas runner shoulder end face 312 and micropore 313，Cathode flow field plate location shoulder 32 is correspondingly arranged with lower support layer 5，Cathode flow field plate side wall gas exit 39 connects setting with upper supporting layer side wall gas exit 16，Extraneous gas runner 34 is located between cathode flow field plate location shoulder 32 and extraneous gas runner shoulder 36，Extraneous gas runner shoulder 36 is correspondingly arranged with suction material 6，Some extraneous gas runners are takeed on 36 tops and are provided with cathode flow field plate groove 35，Some extraneous gas runners are takeed on 36 bottoms and are provided with internal gas runner 37，Internal gas runner 37 is communicated in supporting layer gas flow 14 by side-wall gas passage 33.Cathode flow field plate of the present invention location shoulder 32 plays location and supports the effect of lower support layer 5, extraneous gas runner 34 and internal gas runner 37 each serve as transmission gas effect, extraneous gas runner shoulder 36 plays the effect supporting lower support layer 5 and fixing imbibition material 6, cathode flow field plate groove 35 and micropore 313 are for filling the effect of imbibition material 6, discharge for the superfluous water of fuel cell provides passage, and areole entrance 38 makes cathode reaction gas be flowed into the effect of passage of extraneous gas runner 34.
More specifically, described upper supporting layer 1, outer washer 2 are bolted to connection with cathode flow field plate 3.The present invention adopts the upper supporting layer bolt hole 11 that bolt is each passed through upper supporting layer 1, the outer washer bolt hole 21 of outer washer 2 and the cathode flow field plate bolt hole 31 of cathode flow field plate 3, and fixes.
More specifically, as it is shown in figure 9, described lower support layer 5 is provided with lower support layer groove 51 and lower support layer hollow out 52, lower support layer groove 51 and imbibition material 6 are correspondingly arranged.Lower support layer 5 entirety of the present invention plays the effect supporting fixing imbibition material 6, and wherein lower support layer groove 51 makes imbibition material 6 can pass lower support layer 5, and lower support layer hollow out 52 plays the effect of gas permeable.
More specifically, as shown in Figure 10, described imbibition material 6 includes liquid transpiration material 61, trunk imbibition material 62 and root system imbibition material 63, root system imbibition material 63 is located on trunk imbibition material 62, trunk imbibition material 62 is located on liquid transpiration material 61, and root system imbibition material 63 is in the lower support layer groove 51 of lower support layer 5.Liquid transpiration material 61 of the present invention, trunk imbibition material 62 and root system imbibition material 63, the material of every segment structure is identical and the porosity of material is different with pore size, material can be carbon can also be porous polymer etc., wherein, the minimum hole of porosity of liquid transpiration material 61 is maximum, in the hole of gas from liquid transpiration material 61 during traverse, the transpiration accelerating this section of moisture in materials is scattered and disappeared, and produce transpiration pull, moisture is made to be evaporated with the effect of simulating plant blade transpiring moisture from liquid transpiration material 61, also utilize the excessive moisture that imbibition material 6 absorbs from cathode gas diffusion layer by gas moistening simultaneously, such that it is able to a part of water circulation use that electrochemical reaction is produced；Porosity and the hole of trunk imbibition material 62 take second place, and for the trunk of simulating plant, the Water Transport absorbed by root system imbibition material 63 under the effect of transpiration pull is to liquid transpiration material 61；The porosity maximum pore of root system imbibition material 63 is minimum, for the root system of simulating plant, to absorb moisture from the cathode gas diffusion layer of fuel cell.These three sections of imbibition materials 6 constitute moisture from absorbing transmission again to final rising sinking vias.
Being more than the present invention preferably embodiment, above-mentioned embodiment can also be modified and revise by those skilled in the art in the invention.Therefore, the invention is not limited in that above-mentioned detailed description of the invention, every those skilled in the art make on the basis of the present invention any conspicuously improved, replace or modification belongs to protection scope of the present invention.
Claims (7)
1. the cathode flow field plate biomimetic features improving fuel cell drainage performance, including upper supporting layer (1), outer washer (2), cathode flow field plate (3), inner washer (4), lower support layer (5), imbibition material (6), cathode gas diffusion layer (7), packing ring (8) and cathode catalysis layer (9), described outer washer (2) is located between supporting layer (1) and cathode flow field plate (3), described inner washer (4) is located between cathode flow field plate (3) and imbibition material (6), described cathode gas diffusion layer (7) is located between imbibition material (6) and cathode catalysis layer (9), described packing ring (8) is located between cathode flow field plate (3) and cathode catalysis layer (9).
2. a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance according to claim 1, it is characterized in that: described upper supporting layer (1) is provided with some upper supporting layer bolts hole (11), upper supporting layer hollow-out layer (12), some upper supporting layer runners shoulder (15) and upper supporting layer side wall gas exit (16), described upper supporting layer hollow-out layer (12) and imbibition material (6) are correspondingly arranged, described upper supporting layer hollow-out layer (12) is provided with some upper supporting layer hollow outs (13), between described some upper supporting layer runners shoulder (15), molding is provided with supporting layer gas flow (14), described upper supporting layer side wall gas exit (16) respectively with outer washer (2), cathode flow field plate (3) is correspondingly arranged.
3. a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance according to claim 2, it is characterized in that: described outer washer (2) is provided with some outer washer bolts hole (21) and outer washer side wall gas exit (22), and described outer washer side wall gas exit (22) connects setting with upper supporting layer side wall gas exit (16).
null4. a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance according to claim 2，It is characterized in that: described cathode flow field plate (3) is provided with some cathode flow field plate bolts hole (31)、Cathode flow field plate location shoulder (32)、Side-wall gas passage (33)、Extraneous gas runner (34)、Some extraneous gas runners shoulder (36)、Areole entrance (38)、Cathode flow field plate side wall gas exit (39)、Internal gas runner shoulder (311)、Internal gas runner shoulder end face (312) and micropore (313)，Described cathode flow field plate location shoulder (32) and lower support layer (5) are correspondingly arranged，Described cathode flow field plate side wall gas exit (39) connects setting with upper supporting layer side wall gas exit (16)，Described extraneous gas runner (34) is located between cathode flow field plate location shoulder (32) and extraneous gas runner shoulder (36)，Described extraneous gas runner shoulder (36) and suction material (6) are correspondingly arranged，Described some extraneous gas runners shoulder (36) top is provided with cathode flow field plate groove (35)，Described some extraneous gas runners shoulder (36) bottom is provided with internal gas runner (37)，Described internal gas runner (37) is communicated in upper supporting layer gas flow (14) by side-wall gas passage (33).
5. a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance according to claim 1, it is characterised in that: described upper supporting layer (1), outer washer (2) are bolted to connection with cathode flow field plate (3).
6. a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance according to claim 1, it is characterized in that: described lower support layer (5) is provided with lower support layer groove (51) and lower support layer hollow out (52), and described lower support layer groove (51) and imbibition material (6) are correspondingly arranged.
7. a kind of cathode flow field plate biomimetic features improving fuel cell drainage performance according to claim 6, it is characterized in that: described imbibition material (6) includes liquid transpiration material (61), trunk imbibition material (62) and root system imbibition material (63), described root system imbibition material (63) is located on trunk imbibition material (62), described trunk imbibition material (62) is located on liquid transpiration material (61), and described root system imbibition material (63) is in lower support layer groove (51) of lower support layer (5).
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| CN201610244963.5A CN105742667B (en) | 2016-04-19 | 2016-04-19 | A kind of cathode flow field plate biomimetic features for improving fuel cell drainage performance |
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| CN201610244963.5A CN105742667B (en) | 2016-04-19 | 2016-04-19 | A kind of cathode flow field plate biomimetic features for improving fuel cell drainage performance |
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Cited By (6)
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| CN106711474A (en) * | 2016-12-07 | 2017-05-24 | 武汉理工大学 | Flow field plate structure for increasing drainage performance of fuel cell |
| CN106935885A (en) * | 2017-03-10 | 2017-07-07 | 中国科学院青岛生物能源与过程研究所 | A kind of fuel cell flow field structure of high porosity porous carbon filling and preparation method thereof |
| CN107968211A (en) * | 2017-11-17 | 2018-04-27 | 武汉理工大学 | A kind of flow field plate structure for Proton Exchange Membrane Fuel Cells |
| CN108767304A (en) * | 2018-06-12 | 2018-11-06 | 武汉理工大学 | A kind of hydrogen-oxygen fuel cell heap that drainage is good |
| CN109494385A (en) * | 2018-12-07 | 2019-03-19 | 武汉理工大学 | A kind of monocell and proton exchange film fuel cell electric piling structure in chiasma type flow field |
| CN111092243A (en) * | 2019-12-24 | 2020-05-01 | 太原科技大学 | Runner of fish scale bionic structure for fuel cell |
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| CN111092243A (en) * | 2019-12-24 | 2020-05-01 | 太原科技大学 | Runner of fish scale bionic structure for fuel cell |
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| Publication number | Publication date |
|---|---|
| CN105742667B (en) | 2018-06-08 |
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