CN113381037A - Hydrophobic flow guide polar plate of fuel cell - Google Patents
Hydrophobic flow guide polar plate of fuel cell Download PDFInfo
- Publication number
- CN113381037A CN113381037A CN202010916183.7A CN202010916183A CN113381037A CN 113381037 A CN113381037 A CN 113381037A CN 202010916183 A CN202010916183 A CN 202010916183A CN 113381037 A CN113381037 A CN 113381037A
- Authority
- CN
- China
- Prior art keywords
- channel
- flow guide
- wall
- flow
- fuel cell
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 55
- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 35
- 238000009792 diffusion process Methods 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 230000001154 acute effect Effects 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 8
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 76
- 239000007788 liquid Substances 0.000 abstract description 10
- 238000005452 bending Methods 0.000 abstract 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 105
- 239000012528 membrane Substances 0.000 description 10
- 238000010008 shearing Methods 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000003487 electrochemical reaction Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction 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
-
- 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
- H01M8/0263—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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1007—Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
-
- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
-
- 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 discloses a hydrophobic flow guide polar plate of a fuel cell, which is constructed in the fuel cell and comprises at least one air inlet, at least one air outlet and at least one flow guide gas channel, wherein two ends of the flow guide gas channel are respectively communicated with the air inlet and the air outlet. The flow guiding gas channel comprises at least one flow guiding straight channel, and also can comprise at least one flow guiding half-bent channel or at least one flow guiding full-bent channel. The side wall of the flow guide straight channel is provided with a fin-shaped groove, the flow guide semi-bent channel is provided with a semi-bent flow guide angle, and the flow guide fully-bent channel is provided with a fully-bent flow guide angle. The fin-shaped grooves, the half-bending flow guide angles and the full-bending flow guide angles can transfer liquid water on the surface of the gas diffusion layer to the bottom of the polar plate flow channel under the synergistic action of air flow, ensure high-speed transmission of the liquid water in the polar plate flow channel, enhance the water management capacity of the battery, and improve the performance and stability of the battery.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a hydrophobic flow guide polar plate capable of improving the water management capacity of a fuel cell.
Background
The fuel cell is a device for directly converting chemical energy in fuel into electric energy, and can realize efficient clean utilization of the fuel, so that the fuel cell is one of effective ways for relieving increasingly prominent energy and environmental problems. Compared with the traditional internal combustion engine, the fuel cell stack has the advantages of high energy conversion efficiency, no pollution of exhaust, low noise and the like.
A fuel cell is a power generation device that generates electrical energy by electrochemically reacting hydrogen and oxygen, and includes a plurality of unit cells, as shown in fig. 1, taking a proton exchange membrane fuel cell stack as an example. The single cell 1 comprises a proton exchange membrane 11 at the center, a catalyst layer 12a, 12c is respectively arranged at two sides of the proton exchange membrane, a gas diffusion layer 13a, 13c is respectively arranged at two outer sides of the catalyst layer 12a, 12c, an anode plate 14 and a cathode plate 15 are respectively arranged at two sides of the gas diffusion layer 13a, 13c, and the single cell 1 is formed after the components are tightly combined. The proton exchange membrane 11, the catalyst layers 12a and 12c, and the gas diffusion layers 13a and 13c together constitute a membrane electrode assembly 4.
The fuel cell stack is formed by combining more than one unit cell, as shown in fig. 2 and 3. In a known fuel cell stack 100, the anode plate 14 and the cathode plate 15, which are respectively two adjacent cells 1, can be generally referred to as a bipolar plate 16, and the bipolar plate 16 is provided with a plurality of grooved gas channels 17, 18 on both sides for supplying reaction gas, and in the known fuel cell stack 100, the gas channels 17 supply hydrogen and the gas channels 18 supply air or oxygen.
Since the gas in the bipolar plate 16 of the fuel cell stack 100 must have a certain degree of humidity, the ions generated by the reaction are carried and pass through the proton exchange membrane 11, and proton conduction is achieved. The reactant gases are typically humidified before they are introduced into the stack 100, and the reactant gases have a degree of humidity. Further, during the operation of this fuel cell stack 100, electrochemical reactions occur in the catalyst layer 12c, water is produced, and the water diffuses into the gas channels 18 through the gas diffusion layer. The water droplets 2 introduced into the gas channels 18 adhere to the surface of the gas diffusion layer 13c due to the surface tension, and the water droplets adhering to the surface of the gas diffusion layer 13c block the gas diffusion channels of the gas diffusion layer 13c at that position, reducing the gas diffusion efficiency, slowing down the electrochemical reaction rate, and thereby adversely affecting the performance of the fuel cell stack 100. How to remove the liquid water on the surface of the gas diffusion layer 13c is therefore an important issue for water management of the fuel cell stack 100.
The existing fuel cell technology generally uses the bipolar plate 16 with a hydrophilic surface, and the hydrophilic wall of the bipolar plate has a strong capillary effect to water drops, so that liquid water on the surface of the gas diffusion layer 13c can be adsorbed to the wall of the gas channel 18, thereby cleaning the surface of the gas diffusion layer 13 c. However, the adsorption of the water droplets by the hydrophilic wall surface produces a large viscous force, which reduces the transport speed of the liquid water to the outside in the gas channel 18. The hydrophilic-walled bipolar plates 16 are therefore generally more likely to cause liquid water accumulation in the gas channels 18, resulting in flooding problems that severely affect fuel cell performance, even leading to fuel cell failure, and severely flooding that can shorten cell life. How to remove the liquid water on the surface of the gas diffusion layer 13c while ensuring the transport speed of the liquid water in the gas channels 18 of the bipolar plate 16 is a difficult problem in the fuel cell technology.
Disclosure of Invention
The invention aims to provide a hydrophobic flow guide polar plate of a fuel cell, which is used for improving the discharge efficiency of liquid water in a gas channel and guiding the liquid water on the surface of a gas diffusion layer to be transferred to the bottom of the gas channel so as to remove the surface of the gas diffusion layer, improve the gas diffusion efficiency and improve the performance of the fuel cell.
The invention discloses a hydrophobic flow guide polar plate of a fuel cell, which is constructed in the fuel cell and comprises at least one air inlet, at least one air outlet and at least one flow guide gas channel, wherein two ends of the flow guide gas channel are respectively communicated with the air inlet and the air outlet. The flow guiding gas channel comprises at least one flow guiding straight channel, and also can comprise at least one flow guiding half-bent channel or at least one flow guiding full-bent channel. The flow guide straight channel is formed by two side walls and a bottom wall in a surrounding mode, fin-shaped grooves are formed in the two side walls, and the cross section area of the fin-shaped grooves close to the bottom wall is smaller than that of the gas diffusion layer; the wall surface of the fin-shaped groove comprises an inclined wall and a positive wall, an included angle between the positive wall and the transmission direction of the guide straight channel forms a straight channel guide angle, and the straight channel guide angle is an acute angle. The diversion half-bent channel is formed by surrounding a half-bent inner wall, a half-bent outer wall and a bottom wall, the half-bent outer wall is not perpendicular to the bottom wall, an included angle formed by the half-bent outer wall and the bottom wall in a neutral plane is a half-bent diversion angle, and the half-bent diversion angle is an acute angle. The diversion fully-curved channel is formed by surrounding a fully-curved inner wall, a fully-curved outer wall and a bottom wall, the fully-curved outer wall is not perpendicular to the bottom wall, an included angle formed by the fully-curved outer wall and the bottom wall in a neutral plane is a fully-curved diversion angle, and the fully-curved diversion angle is an acute angle.
The hydrophobic flow guide polar plate of the fuel cell is mainly used as a cathode plate of a fuel cell stack, can also be used as an anode plate of the fuel cell stack, and can also be combined with the anode plate to form the hydrophobic flow guide bipolar plate.
The invention relates to a hydrophobic flow guide polar plate of a fuel cell, wherein the wall surface of the hydrophobic flow guide polar plate is hydrophobic, and the contact angle of the wall surface is more than 90 degrees.
The invention relates to a hydrophobic flow guide polar plate of a fuel cell, wherein the flow guide straight channel, the flow guide semi-bent channel and the flow guide fully-bent channel can be applied to a flow guide gas channel singly or simultaneously, and the flow guide gas channel can be in different configurations, such as a parallel gas channel, a single serpentine gas channel, a multi-serpentine gas channel and other forms of flow guide gas channels formed by the evolution of the three channels.
When the fuel cell stack is in reaction, at least one water drop is generated on the surface of the gas diffusion layer in the diversion gas channel, and the water drop is adhered to the surface of the gas diffusion layer under the action of surface tension. After the water drops in the guide straight channel contact the side wall of the straight channel, the water drops can be attached to the side wall of the straight channel and the surface of the gas diffusion layer at the same time. Under the shearing action of the air flow, the water drops move forwards, and after the water drops enter the fin-shaped groove, the water drops contact the front wall, and the water drops are guided to be separated from the surface of the gas diffusion layer by the lifting action of the front wall and the shearing action of the air flow on the water drops and transferred to the bottom wall. The water drops contacting the bottom wall will continue to be transported forward along the bottom wall until they exit the guide gas channel.
The water drops in the diversion semi-curved channel move forwards under the shearing action of the air flow, and after the water drops contact the semi-curved outer wall, the water drops can be guided to separate from the surface of the gas diffusion layer and move forwards along the semi-curved outer wall under the lifting action of the semi-curved outer wall on the water drops and the shearing action of the air flow on the water drops, so that the water drops contact the bottom wall. The water drops contacting the bottom wall will continue to be transported forward along the bottom wall until they exit the guide gas channel.
The water drops in the diversion fully-curved channel move forwards under the shearing action of the air flow, and after the water drops contact the fully-curved outer wall, the lifting action of the fully-curved outer wall on the water drops and the shearing action of the air flow on the water drops can guide the water drops to separate from the surface of the gas diffusion layer and move forwards along the fully-curved outer wall, so that the water drops contact the bottom wall. The water drops contacting the bottom wall will continue to be transported forward along the bottom wall until they exit the guide gas channel.
According to the technical scheme, the beneficial effects of the invention are as follows:
the hydrophobic flow guide polar plate of the fuel cell can effectively remove water drops on the surface of the gas diffusion layer, and the wall surface of the hydrophobic flow guide polar plate is hydrophobic, so that the transmission speed of the water drops transferred from the surface of the gas diffusion layer to the bottom wall in the flow guide gas channel is not negatively affected, and the drainage efficiency is ensured. Therefore, the hydrophobic flow guide polar plate of the fuel cell can remove water on the surface of the gas diffusion layer and ensure higher drainage efficiency, so that the performance and the stability of the fuel cell stack can be obviously improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a known fuel cell;
fig. 2 is a schematic sectional view of a part of the structure of a known fuel cell stack;
FIG. 3 is a cross-sectional view of section A-A of FIG. 2;
fig. 4 is a schematic plan view of a first example of a hydrophobic deflector plate of a fuel cell of the present invention;
FIG. 5 is a schematic view of the structure of a flow guide straight channel of a hydrophobic flow guide plate of a fuel cell according to the present invention;
FIG. 6 is a schematic view of a semi-curved flow-guide channel structure of a hydrophobic flow-guide plate of a fuel cell according to the present invention;
FIG. 7 is a schematic view of a structure of a flow-guiding fully-curved channel of a hydrophobic flow-guiding plate of a fuel cell according to the present invention;
FIG. 8 is a schematic view of a first embodiment of the present invention in partial relative position to a membrane electrode assembly;
FIG. 9 is a schematic view of a flow-directing gas channel structure according to a first embodiment of the present invention;
FIG. 10 is a schematic view of a flow-directing gas channel structure according to a second embodiment of the present invention;
FIG. 11 is a schematic view of a flow-directing gas channel according to a third embodiment of the present invention;
FIG. 12 is a schematic view of a flow-directing gas channel according to a fourth embodiment of the present invention;
in the figure: 1-single cell, 11-proton exchange membrane, 12 a-anode catalyst layer, 12 c-cathode catalyst layer, 13 a-anode gas diffusion layer, 13 c-cathode gas diffusion layer, 131-gas diffusion layer surface, 14-anode plate, 15-cathode plate, 16-bipolar plate, 17-anode gas channel, 18-cathode gas channel, 100-fuel cell stack, 2-water droplet, 3-hydrophobic flow guide plate, 31-gas inlet, 32-gas outlet, 33-flow guide gas channel, 331-flow guide straight channel, 3311-fin groove, 3312-positive wall, 3313-inclined wall, 3314-straight channel flow guide angle, 332-flow guide half-bend channel, 3321-half-bend inner wall, 3322-half-bend outer wall, 3323-half-bend neutral plane, 3324-half-bend diversion angle, 333-diversion full-bend channel, 3331-full-bend inner wall, 3332-full-bend outer wall, 3333-full-bend neutral plane, 3334-full-bend diversion angle, 334-bottom wall, 335-side wall, 34-single serpentine diversion gas channel, 35-multi serpentine diversion gas channel, 36-parallel diversion gas channel, 4-membrane electrode assembly and 5-anode plate.
The specific implementation mode is as follows:
example one
As shown in fig. 4 to 9, the hydrophobic flow-guiding plate 3 of a fuel cell stack includes a gas inlet 31, a gas outlet 32 and a flow-guiding gas channel 33, and two ends of the flow-guiding gas channel 33 are respectively communicated with the gas inlet 31 and the gas outlet 32. The flow-guiding gas channel 33 has a multi-serpentine shape, and includes a plurality of flow-guiding straight channels 331, a plurality of flow-guiding half-curved channels 332, and a plurality of flow-guiding full-curved channels 333. The flow-guiding straight channel 331 is surrounded by two sidewalls 335 and a bottom wall 334, the two sidewalls 335 have a fin-shaped groove 3311, the cross-sectional area of the fin-shaped groove 3311 near the bottom wall 334 is smaller than the cross-sectional area near the gas diffusion layer surface 131; the wall of the fin-shaped trench 3311 includes an inclined wall 3313 and a straight wall 3312, an included angle between the straight wall 3312 and the transmission direction of the straight flow guide path 331 forms a straight flow guide angle 3314, and the straight flow guide angle 3314 is an acute angle. The diversion half-curved channel 332 is formed by surrounding a half-curved inner wall 3321, a half-curved outer wall 3322 and a bottom wall 334, the half-curved outer wall 3322 is not perpendicular to the bottom wall 334, an included angle formed by the half-curved neutral plane 3323 between the half-curved inner wall 3321 and the half-curved outer wall 3322 is a half-curved diversion angle 3324, and the half-curved diversion angle 3324 is an acute angle. The flow-guiding fully-curved channel 333 is formed by surrounding a fully-curved inner wall 3331, a fully-curved outer wall 3332 and a bottom wall 334, the fully-curved outer wall 3332 is not perpendicular to the bottom wall 334, an included angle formed by the fully-curved neutral plane 3333 between the fully-curved inner wall 3331 and the fully-curved outer wall 3332 is a fully-curved flow-guiding angle 3334, and the fully-curved flow-guiding angle 3334 is an acute angle.
The hydrophobic flow guide polar plate 3 is constructed in a fuel cell pack, a membrane electrode assembly 4 and an anode plate 5 are sequentially covered above the hydrophobic flow guide polar plate, and the anode plate 5 can adopt a polar plate in a traditional gas channel form or adopt the same polar plate as the hydrophobic flow guide polar plate 3; the hydrophobic flow guide polar plate 3 can also be combined with the anode plate 5 to form a hydrophobic flow guide bipolar plate.
The wall surfaces of the hydrophobic flow guide polar plate 3 and the anode plate 5 are hydrophobic, and the contact angle of the wall surfaces is larger than 90 degrees.
A large number of water droplets 2 are generated on the surface 131 of the gas diffusion layer in the guide gas channel when the fuel cell stack is subjected to reaction, and the faster the electrochemical reaction, the more water droplets 2 are generated. The water droplets 2 will adhere to the gdl surface 131 under surface tension, and the shearing action of the gas flow on the water droplets will move the water droplets 2 forward along the gdl surface 131. Since the flow guiding gas channel 33 simultaneously comprises the flow guiding straight channel 131, the flow guiding semi-curved channel 332 and the flow guiding fully-curved channel 333, different water drops 2 on the surface 131 of the gas diffusion layer can respectively contact different flow guiding structures.
For the water droplet 2 located in the flow-guiding through channel 331 and first contacting the sidewall 335, the water droplet 2 will adhere to both the sidewall 335 and the gas diffusion layer surface 131. When it enters the fin-shaped groove 3311, the water droplet 2 contacts the front wall 3312, and the lifting action of the front wall 3312 on the water droplet 2 and the shearing action of the gas flow on the water droplet 2 can guide the water droplet 2 to leave the gas diffusion layer surface 131 and transfer to the bottom wall 334. The water droplets contacting the bottom wall 334 will continue to be transported along the bottom wall 334 until they exit the guide gas channel 33. In this process, the water droplet 2 may pass through the flow guiding half-turn passage 332 or the flow guiding full-turn passage 333 without changing the forward movement state of the water droplet 2 along the bottom wall 334.
With the water droplet 2 first contacting the semi-curved outer wall 3322, the lifting action of the semi-curved outer wall 3322 on the water droplet 2 and the shearing action of the gas stream on the water droplet 2 can direct the water droplet 2 to move off the gas diffusion layer surface 131 and along the semi-curved outer wall 3322 and thus contact the bottom wall 334. Droplets 2 contacting the bottom wall 334 will continue to travel along the bottom wall 334 until they exit the guide gas channel 33.
With the water droplet 2 first contacting the fully curved outer wall 3332, the lifting action of the fully curved outer wall 3332 on the water droplet 2 and the shearing action of the gas stream on the water droplet 2 can direct the water droplet 2 to move off the gas diffusion layer surface 131 and along the fully curved outer wall 3332 and thus contact the bottom wall 334. Droplets 2 contacting the bottom wall 334 will continue to travel along the bottom wall 334 until they exit the guide gas channel 33.
Example 2
Fig. 10 is a schematic structural view of a multi-serpentine flow-guiding gas channel 34, and as compared with embodiment 1, the flow-guiding gas channel 34 only includes a flow-guiding half-turn channel 332, a flow-guiding full-turn channel 333 and a conventional straight channel, and there is no flow-guiding straight channel 331, so that water droplets on the surface 131 of the gas diffusion layer in the flow-guiding gas channel 34 can be removed only when the water droplets pass through the flow-guiding half-turn channel 332 or the flow-guiding full-turn channel 333.
Example 3
Fig. 11 is a schematic structural view of the flow-guiding gas channel 35 having a single serpentine configuration, and it can be seen that the flow-guiding gas channel 35 only includes a flow-guiding full-curved channel 333 and a conventional straight channel, and water droplets on the surface 131 of the gas diffusion layer in the flow-guiding gas channel 35 can be removed only when the water droplets pass through the flow-guiding full-curved channel 333.
Example 4
Fig. 12 is a schematic view of the structure of the flow-guiding gas channel 36 in a parallel configuration, and it can be seen that the flow-guiding gas channel 36 only includes a flow-guiding straight channel 331, and water droplets on the surface 131 of the gas diffusion layer in the flow-guiding gas channel 36 can be removed only after the water droplets contact the side wall 335.
Although the present invention has been described with reference to particular embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A hydrophobic deflector plate for a fuel cell, comprising: the hydrophobic flow guide polar plate is constructed in a fuel cell and comprises at least one air inlet, at least one air outlet and at least one flow guide gas channel, wherein two ends of the flow guide gas channel are respectively communicated with the air inlet and the air outlet; the flow guiding gas channel comprises at least one flow guiding straight channel, and also can simultaneously comprise at least one flow guiding half-bent channel or at least one flow guiding full-bent channel;
the flow guide straight channel is formed by two side walls and a bottom wall in a surrounding mode, fin-shaped grooves are formed in the two side walls, and the cross section area of the fin-shaped grooves close to the bottom wall is smaller than that of the gas diffusion layer;
the wall surface of the fin-shaped groove comprises an inclined wall and a positive wall, an included angle between the positive wall and the transmission direction of the guide straight channel forms a straight channel guide angle, and the straight channel guide angle is an acute angle;
the flow guide semi-curved channel is formed by encircling a semi-curved inner wall, a semi-curved outer wall and a bottom wall, the semi-curved outer wall is not perpendicular to the bottom wall, an included angle formed by the semi-curved outer wall and the bottom wall in a neutral plane is a semi-curved flow guide angle, and the semi-curved flow guide angle is an acute angle;
the diversion fully-curved channel is formed by surrounding a fully-curved inner wall, a fully-curved outer wall and a bottom wall, the fully-curved outer wall is not perpendicular to the bottom wall, an included angle formed by the fully-curved outer wall and the bottom wall in a neutral plane is a fully-curved diversion angle, and the fully-curved diversion angle is an acute angle.
2. The hydrophobic flow guide plate of a fuel cell of claim 1, wherein: mainly used as a cathode plate of a fuel cell, can also be used as an anode plate of the fuel cell, and can also be combined with the anode plate to form a bipolar plate for a fuel cell stack.
3. The hydrophobic flow guide plate of a fuel cell of claim 1, wherein: the wall surface of the hydrophobic flow guide polar plate is hydrophobic, and the contact angle of the wall surface is larger than 90 degrees.
4. The hydrophobic flow guide plate of a fuel cell of claim 1, wherein: the flow guide straight channel, the flow guide semi-bent channel and the flow guide fully-bent channel can be applied to the flow guide gas channel singly or simultaneously, and the flow guide gas channel can be in different configurations, such as a parallel gas channel, a single serpentine gas channel, a multi-serpentine gas channel and other forms of flow guide gas channels obtained by the evolution of the three channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010916183.7A CN113381037B (en) | 2020-09-03 | 2020-09-03 | Hydrophobic flow guide polar plate of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010916183.7A CN113381037B (en) | 2020-09-03 | 2020-09-03 | Hydrophobic flow guide polar plate of fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113381037A true CN113381037A (en) | 2021-09-10 |
| CN113381037B CN113381037B (en) | 2022-05-10 |
Family
ID=77568969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010916183.7A Active CN113381037B (en) | 2020-09-03 | 2020-09-03 | Hydrophobic flow guide polar plate of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113381037B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040191606A1 (en) * | 2003-03-25 | 2004-09-30 | Samsung Electronics Co., Ltd. | Bipolar plate and fuel cell including the same |
| US20070148526A1 (en) * | 2005-12-23 | 2007-06-28 | Simon Farrington | Fuel cell water management system and method |
| CN101379642A (en) * | 2006-02-02 | 2009-03-04 | 松下电器产业株式会社 | Separator plate and fuel cell |
| CN106654316A (en) * | 2016-11-15 | 2017-05-10 | 北京卫星制造厂 | Novel negative electrode runner suitably used for aerospace static water discharge |
| JP2017204450A (en) * | 2016-05-13 | 2017-11-16 | トヨタ自動車株式会社 | Fuel cell module |
| CN107611457A (en) * | 2017-08-31 | 2018-01-19 | 上海汽车集团股份有限公司 | A kind of fuel cell and its minus plate |
| CN107665999A (en) * | 2017-09-21 | 2018-02-06 | 天津大学 | The optimization structure of Proton Exchange Membrane Fuel Cells monoblock type cathode flow channels |
| CN110380077A (en) * | 2019-07-26 | 2019-10-25 | 苏州弗尔赛能源科技股份有限公司 | A kind of combined type runner fuel battery double plates |
| CN110402513A (en) * | 2015-04-20 | 2019-11-01 | 能源奥尔技术有限公司 | Method for producing osculating fluid flow field plates |
| CN111463449A (en) * | 2020-04-09 | 2020-07-28 | 温州大学 | High-performance fuel cell bipolar plate with three-dimensional flow field structure and preparation method thereof |
| CN111584897A (en) * | 2020-05-28 | 2020-08-25 | 武汉理工大学 | Renewable fuel cell oxygen electrode flow field plate based on three-dimensional bionic structure and cell structure |
| CN111600045A (en) * | 2020-06-04 | 2020-08-28 | 清华大学山西清洁能源研究院 | Scale-shaped split-flow type bipolar plate for fuel cell containing capillary lands |
-
2020
- 2020-09-03 CN CN202010916183.7A patent/CN113381037B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040191606A1 (en) * | 2003-03-25 | 2004-09-30 | Samsung Electronics Co., Ltd. | Bipolar plate and fuel cell including the same |
| US20070148526A1 (en) * | 2005-12-23 | 2007-06-28 | Simon Farrington | Fuel cell water management system and method |
| CN101379642A (en) * | 2006-02-02 | 2009-03-04 | 松下电器产业株式会社 | Separator plate and fuel cell |
| CN110402513A (en) * | 2015-04-20 | 2019-11-01 | 能源奥尔技术有限公司 | Method for producing osculating fluid flow field plates |
| JP2017204450A (en) * | 2016-05-13 | 2017-11-16 | トヨタ自動車株式会社 | Fuel cell module |
| CN106654316A (en) * | 2016-11-15 | 2017-05-10 | 北京卫星制造厂 | Novel negative electrode runner suitably used for aerospace static water discharge |
| CN107611457A (en) * | 2017-08-31 | 2018-01-19 | 上海汽车集团股份有限公司 | A kind of fuel cell and its minus plate |
| CN107665999A (en) * | 2017-09-21 | 2018-02-06 | 天津大学 | The optimization structure of Proton Exchange Membrane Fuel Cells monoblock type cathode flow channels |
| CN110380077A (en) * | 2019-07-26 | 2019-10-25 | 苏州弗尔赛能源科技股份有限公司 | A kind of combined type runner fuel battery double plates |
| CN111463449A (en) * | 2020-04-09 | 2020-07-28 | 温州大学 | High-performance fuel cell bipolar plate with three-dimensional flow field structure and preparation method thereof |
| CN111584897A (en) * | 2020-05-28 | 2020-08-25 | 武汉理工大学 | Renewable fuel cell oxygen electrode flow field plate based on three-dimensional bionic structure and cell structure |
| CN111600045A (en) * | 2020-06-04 | 2020-08-28 | 清华大学山西清洁能源研究院 | Scale-shaped split-flow type bipolar plate for fuel cell containing capillary lands |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113381037B (en) | 2022-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2269842C2 (en) | Fuel-cell module using solid polymeric electrolyte, fuel cell pile, and method for feeding chemically active gas to fuel cell | |
| CN100336260C (en) | Solid polymer cell assembly | |
| US7691511B2 (en) | Fuel cell having coolant flow field wall | |
| JP2019515436A (en) | Bipolar plate with reactant gas channels of varying cross-sectional area, fuel cell stack, and vehicle with such fuel cell stack | |
| US20110274999A1 (en) | Fuel cell stack | |
| CN112331878B (en) | Proton exchange membrane fuel cell | |
| CN107681175B (en) | Optimization structure of split type cathode runner of proton exchange membrane fuel cell | |
| CN107968211B (en) | Flow field plate structure for proton exchange membrane fuel cell | |
| KR20060081603A (en) | Stack for fuel cell and fuel cell system with the same | |
| CN112909283A (en) | Proton exchange membrane fuel cell bipolar plate | |
| CN107665999B (en) | Optimized structure of integral cathode runner of proton exchange membrane fuel cell | |
| JP5302263B2 (en) | Fuel cell | |
| CN113381037B (en) | Hydrophobic flow guide polar plate of fuel cell | |
| CN116826094A (en) | Flow guiding type porous flow passage for hydrogen fuel cell and bipolar plate structure | |
| CN110854409B (en) | Humidifier for fuel cell | |
| CN115020738B (en) | Monopolar plate, bipolar plate and galvanic pile | |
| CN116646551A (en) | Double-slope gas flow passage structure for proton exchange membrane fuel cell | |
| CN101714643B (en) | Material design to enable high mid-temperature performance of a fuel cell with ultrathin electrodes | |
| CN215644582U (en) | Proton exchange membrane fuel cell cathode plate | |
| KR100921568B1 (en) | Fuel Cell Seperator Having Differential Channel Length of Cooling Passage and Fuel Cell Stack with the Same | |
| CN113224344A (en) | Proton exchange membrane fuel cell polar plate runner structure and fuel cell | |
| CN220086090U (en) | Bipolar plate flow field structure and fuel cell | |
| CN221041172U (en) | Bipolar plate and low-temperature polymer electrolyte membrane fuel cell | |
| KR20200028072A (en) | Fuel cell stack | |
| CN220456461U (en) | Membrane electrode assembly for fuel cell 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |