CN109950572A - Fuel cell and metal polar plate and bipolar plate thereof - Google Patents
Fuel cell and metal polar plate and bipolar plate thereof Download PDFInfo
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- CN109950572A CN109950572A CN201910253039.7A CN201910253039A CN109950572A CN 109950572 A CN109950572 A CN 109950572A CN 201910253039 A CN201910253039 A CN 201910253039A CN 109950572 A CN109950572 A CN 109950572A
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- cooling water
- polar plate
- outlet
- metal polar
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 52
- 239000002184 metal Substances 0.000 title claims abstract description 52
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 239000000498 cooling water Substances 0.000 claims abstract description 91
- 238000009792 diffusion process Methods 0.000 claims description 36
- 230000008676 import Effects 0.000 claims description 35
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 34
- 239000001301 oxygen Substances 0.000 abstract description 34
- 229910052760 oxygen Inorganic materials 0.000 abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 30
- 238000006243 chemical reaction Methods 0.000 abstract description 25
- 239000001257 hydrogen Substances 0.000 abstract description 21
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 21
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 17
- 239000007789 gas Substances 0.000 description 13
- 239000012495 reaction gas Substances 0.000 description 13
- 239000012528 membrane Substances 0.000 description 12
- 239000010410 layer Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000003487 electrochemical reaction Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000036647 reaction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Fuel Cell (AREA)
Abstract
The invention provides a fuel cell and a metal polar plate and a bipolar plate thereof, relating to the technical field of fuel cells. The method comprises the following steps: the polar plate is provided with a first inlet and a first outlet, and the first inlet is communicated with the first outlet through the first channel; the core of the polar plate is provided with a cooling water inlet, the edge of the polar plate is provided with a cooling water outlet, and the cooling water inlet is communicated with the cooling water outlet through a cooling water channel. And welding the two polar plates together, wherein one polar plate is filled with hydrogen, the other polar plate is filled with oxygen, and a cooling water channel formed between the two polar plates is filled with cooling water. And a cooling water inlet is arranged at the core of the polar plate, namely the middle position of the polar plate, low-temperature cooling water is introduced from the region with the maximum reaction heat, the heat is directly and effectively dissipated to the middle region, and the low-temperature cooling water is discharged from the cooling water outlet. Power structures such as a water pump and the like are not needed to increase the flow of cooling water, so that water resources are saved and electric power is saved.
Description
Technical field
The present invention relates to field of fuel cell technology, in particular to a kind of fuel cell and its metal polar plate, bipolar
Plate.
Background technique
Significant development has been obtained as 21 century clean energy resource in Hydrogen Energy, and wherein hydrogen fuel cell is as hydrogen utilization
Demoncal ration has begun to obtain the support energetically of national policy.Such as the development of fuel cell new-energy automobile, fuel cell
Automobile is different from general internal combustion engine and lithium battery automobile, it is similar to the combination of internal combustion engine and lithium battery, and power section is adopted
With fuel cell, electrochemical reaction occurs by the way that hydrogen is added, generates electric current.Fuel cell itself does not have to charge, it is only necessary to fill
Electrochemical reaction occurs for hydrogen and air, and hydrogen, which charges, only needs 5 minutes, and course continuation mileage can achieve more than 500 kilometers, far more than
The course continuation mileage of lithium battery.
Fuel cell pile (hereinafter referred to as pile) main composition part are as follows: end plate, bipolar plates (also known as partition), membrane electrode
(including carbon paper diffusion layer, dielectric film, Catalytic Layer).Bipolar plates include graphite bi-polar plate, metal double polar plates, and graphite bi-polar plate is easy
It is broken, volume is big.Metal double polar plates are then that two metal polar plates are constituted, and polar board surface is provided with the proton for hydrogen catalyzed proton
Exchange membrane needs effectively to dissipate in the use process of metal polar plate since reaction can generate reaction heat between two pole plates
Heat need to lead to cooling water between two pole plates.The cooling water flow path setting of existing metal polar plate cannot effectively radiate, and need benefit
Increasing cooling water flow with water pump just can effectively radiate, and cause energy waste.
Summary of the invention
For solve in the prior art metal polar plate cannot effectively radiate, energy waste the technical issues of, of the invention is main
Purpose is, provides a kind of effectively heat dissipation, energy saving fuel cell and its metal polar plate, bipolar plates.
In a first aspect, the embodiment of the invention provides a kind of metal polar plates, comprising: first passage, the pole plate are provided with
First import and first outlet, first import are connected to by the first passage with the first outlet；
Cooling water inlet is provided at the type heart of the pole plate, the edge of the pole plate is provided with cooling water outlet, described
Cooling water inlet is connected to the cooling water outlet by cooling-water duct.
Further, in a preferred embodiment of the invention, the first passage is arc-shaped；The first passage
Several are set as, several first passages are respectively positioned on using the type heart as on the concentric circles in the center of circle.
Further, in a preferred embodiment of the invention, first import, the first outlet and institute are connected
In line, several first passages are symmetrical arranged in the two sides of the straight line, and described the first of every side for the type heart of stating
Channel is respectively positioned on using the type heart as in the fan-shaped region in the center of circle.
Further, in a preferred embodiment of the invention, positioned at the every two adjacent of described straight line the same side
The distance between the first passage is equal.
Further, in a preferred embodiment of the invention, further includes: second channel, the pole plate are provided with the
Two imports and second outlet, second import are connected to by the second channel with the second outlet.
Further, in a preferred embodiment of the invention, the second channel is arc-shaped, the second channel
It is set between the every two adjacent first passage；
Several second channels are symmetrical arranged in the two sides of the straight line, and the second channel of every side is respectively positioned on
Using the type heart as in the fan-shaped region in the center of circle.
Further, straight where second import and the second outlet in a preferred embodiment of the invention
Line is mutually perpendicular to straight line where first import and the first outlet, and intersection point is the type heart.
Further, in a preferred embodiment of the invention, further includes: diffusion region, first import are located at institute
It states in diffusion region, the import of the first passage is connected to the diffusion region.
Further, in a preferred embodiment of the invention, several lead is provided in first import of diffusion region
Chute, the diversion trench and first inlet communication.
Further, in a preferred embodiment of the invention, further includes: doab, the first outlet are located at institute
It states in doab, the outlet of the first passage is connected to the doab.
Further, in a preferred embodiment of the invention, the doab is provided with several confluence runners, with every
Two adjacent first passages are one group, and first passage described in every group is connected to the same confluence runner.
Further, in a preferred embodiment of the invention, the cooling water outlet is set along the edge of the pole plate
It is equipped with multiple, and each cooling water outlet being equidistant to the type heart.
Further, in a preferred embodiment of the invention, there are four the cooling water outlet settings, every two phase
The central angle that the adjacent cooling water outlet and the type heart are constituted is 90 °.
Further, in a preferred embodiment of the invention, the type heart is the center of circle of the pole plate.
Second aspect, the embodiment of the invention provides a kind of metal double polar plates, including two pole plates, the pole plate is above-mentioned
Described in any item metal polar plates；The cooling-water duct is formed between the adjacent pole plate.
The third aspect, the embodiment of the invention provides a kind of fuel cells, including metal polar plate described in any of the above embodiments.
A kind of fuel cell and its metal polar plate, bipolar plates provided in an embodiment of the present invention, the first passage can be used
In being passed through reaction gas, two pieces of pole plates are welded together, a pole plate is passed through hydrogen, and a pole plate is passed through
Oxygen, the cooling-water duct formed between two pole plates walk cooling water.Reaction gas in the pole plate and it is covered on pole
The proton exchange membrane of plate surface contacts, and receives the hydrogen proton after proton exchange Membrane catalysis.Just start the reaction gas being passed through
React not strong, therefore the heat generated is not high, for the reaction zone of pole plate mainly at intermediate position, heat assembles most serious.It is existing
There is the cooling water inlet in technology to be arranged at one side of pole plate, this make cooling water by entrance flow into cooling-water duct need by
Stretch diameter gets to position among pole plate, and reaching when heat assembles the main reaction region medium position of most serious has been to rise
Cooling water after temperature, therefore heat dissipation effect is bad.The entrance of cooling water is arranged at the type heart of the pole plate in the application,
That is the middle position of pole plate is passed through low-temperature cooling water by the maximum region of heat of reaction, directly effectively dissipates to intermediate region
Heat, and be discharged by the cooling water outlet.It does not need the dynamic structures such as setting water pump and carries out increasing cooling water flow, both save water
Resource saves electric power again.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram for the metal polar plate that one embodiment of the invention provides；
Fig. 2 is enlarged diagram at the A of Fig. 1；
Fig. 3 is the structural schematic diagram for the bipolar plates that one embodiment of the invention provides.
Appended drawing reference:
1 pole plate 11- location hole, 20 21 first import of first passage, 22 first outlet
30 cooling-water duct, 31 cooling water inlet, 32 cooling water outlet, 4 diffusion region
Converge 60 second channel of runner for 41 diversion trench, 5 doab 51
61 second import, 62 second outlet
Specific embodiment
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the application embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
As shown in Figure 1-3, a kind of metal polar plate 1 that one embodiment of the invention provides, comprising: first passage 20, the pole
Plate 1 is provided with the first import 21 and first outlet 22, and first import 21 is gone out by the first passage 20 with described first
Mouth 22 is connected to；Cooling water inlet 31 is provided at the type heart of the pole plate 1, the edge of the pole plate 1 is provided with cooling water outlet
32, the cooling water inlet 31 is connected to the cooling water outlet 32 by cooling-water duct 30.It is provided in an embodiment of the present invention
A kind of metal polar plate 1, the first passage 20 can be used for being passed through reaction gas, two pieces of pole plates 1 be welded together, one
A pole plate 1 is passed through hydrogen, and a pole plate 1 is passed through oxygen, the cooling-water duct 30 formed between two pole plates 1
Walk cooling water.Reaction gas in the pole plate 1 is contacted with the proton exchange membrane for being covered on 1 surface of pole plate, and reception is handed over through proton
Hydrogen proton after changing Membrane catalysis.It is not strong just to start the reaction gas being passed through reaction, therefore the heat generated is not high, pole plate
For 1 reaction zone mainly at intermediate position, heat assembles most serious.Cooling water inlet 31 in the prior art is arranged at pole plate 1
One side, this, which makes cooling water flow into cooling-water duct 30 by entrance, to get to the intermediate position of pole plate 1 by stretch diameter,
And the cooling water after heating when reaching the main reaction region medium position of heat aggregation most serious it has been, therefore heat dissipation effect is not
It is good.The entrance of cooling water is arranged at the type heart of the pole plate 1 in the application namely the middle position of pole plate 1, by reaction heat
It measures maximum region to start to be passed through low-temperature cooling water, directly effectively radiate to intermediate region, and by 32 row of cooling water outlet
Out.It does not need the dynamic structures such as setting water pump and carries out increasing cooling water flow, not only saved water resource but also saved electric power.
Reaction is had while electrochemical reaction to be thermally generated, has cooling-water duct 30 among two pole plates 1, is convenient for cooling water
Heat inside cell reaction is taken away, prevents the excessively high activity for destroying catalyst of temperature and proton exchange membrane because temperature is excessively high
And dry-cracking, it can not also make proton pass through after film is dry, pile output power can be lower.The metal polar plate 1 of the prior art
31 position of structure cooling water inlet is generally set on the side of pole plate 1, in order to arrange the overall structure of pole plate 1 or battery, but
It is set as so that cooling water will appear coolant water temperature during flowing to the other end from one end of interlayer between two pieces of unipolar plates 1
Degree gradually rises, and for the reaction zone of pole plate 1 mainly at intermediate position, it is in expansion that reaction gas, which has just enter into main reaction region before, in fact
The stage of dissipating reacts not strong, and heat is not also high；If opening the structure of cold water intaking entrance using one side, it be easy to cause cooling water
Arrival heat has been that the cooling water after heating must in order to increase heat dissipation capacity when assembling the main reaction region medium position of most serious
Water flow must be increased using water pump can just take away the heat in the middle part of reaction zone completely.Consequence caused by this way is pile itself
Output work a part is taken away by water pump, output power decline.Cooling water inlet 31 is set up directly on middle position in the application,
As shown in Figure 1-3, through-hole, which is arranged, after bipolar plates 1 are welded in the type heart position of pole plate 1 forms cooling water among two pole plates 1
Channel 30, the settable water pipe through through-hole, and be open in water pipe and the setting of 30 connectivity part of cooling-water duct, so that cold in water pipe
But water flows into cooling-water duct 30 by through-hole, and the cooling water of low temperature directly acts on the highest intermediate position of heat, effectively radiates,
Auxiliary pump work consumption is reduced, the output power of pile is improved.
For two metal polar plates 1 with the use of bipolar plates 1 used in battery are constituted, bipolar plates 1 are mainly undertaken in battery
The structure of reactant (hydrogen and oxygen), a plate is cathode plate 1 (oxygen side) in bipolar plates 1, a plate is 1 (hydrogen of anode plate
Side), the flow field of setting oxygen or hydrogen circulation is needed in bipolar plates 1.The flow field of metal polar plate 1 includes: flat in the prior art
Straight channel, serpentine flow path, interdigitated runner, dotted flow field, mesh flow field, bionical flow field and the flow field 3D of Toyota's original creation.Its
In straight flow field and serpentine flow be to be commercialized most popular flow field structure at present, remaining flow field is mainly laboratory research rank
The main reason for section, the flow field 3D developmental limitation is that technological difficulty is higher.In order to enable reaction gas diffusion is more evenly, such as
Shown in Fig. 1-3, a kind of metal polar plate 1 provided in one embodiment of the invention, the first passage 20 is arc-shaped；Described first
Channel 20 is set as several, and several first passages 20 are respectively positioned on using the type heart as on the concentric circles in the center of circle, first is logical
The setting of 20 shape of road and quantity makes gas be distributed in 1 surface of pole plate convenient for large area, convenient for the uniformity of gas diffusion.
Metal double polar plates 1 include two pole plates 1 of yin-yang, and cathode plate 1 walks oxygen side, and anode plate 1 walks hydrogen.In use process
Two pieces of pole plates 1 are welded together, a pole plate 1 walks hydrogen, and a pole plate 1 walks oxygen, and the crack among two pole plates 1 walks cooling
Water.Flow field structure on pole plate 1 will meet reactant (hydrogen or oxygen) uniformly, since the diffusion rate of hydrogen is the 5 of oxygen
Times, and electrochemical reaction occurs for hydrogen and oxygen, and generating water is in cathode oxygen side, therefore the structure in the flow field of cathode plate 1 is wanted
Ask higher, the metal polar plate 1 provided in the embodiment of the present invention focuses on to consider the structure setting of cathode plate 1, the in the present embodiment
Walk oxygen in one channel 20.
As shown in Figure 1, connecting first import 21, described first in the metal polar plate 1 that one embodiment of the invention provides
In line, several first passages 20 are symmetrical arranged in the two sides of the straight line, and each for outlet 22 and the type heart
The first passage 20 of side is respectively positioned on using the type heart as in the fan-shaped region in the center of circle.As seen from the figure, it in the present embodiment, is used for
The first passage 20 being oxygenated is symmetrical in the two sides of first straight line, is arranged in pairs, and symmetrical two described first logical
The center of circle for the circle that road 20 is formed is the type heart.It can setting first passage as much as possible in the case where 1 area of pole plate allows
20, so that the area that the runner of oxygen is distributed is bigger, it is more convenient for that reactant (oxygen) is made to be evenly distributed.Cathode reaction gas oxygen
After being passed through pole plate 1, water is generated in conjunction with the hydrogen ion that anode hydrogen gas side is electrolysed out, while electronics is gathered together shape through collector plate
At electric current.
In the present embodiment, positioned at the distance between the every two adjacent first passage 20 of described straight line the same side phase
Deng；Guarantee the uniformity of gas diffusion.
In addition, effectively being spread to promote oxygen to enter 1 initial stage of pole plate, to guarantee that it is logical that oxygen can uniformly enter each first
Road 20, as shown in Figure 1, in one embodiment of the invention, further includes: diffusion region 4, first import 21 are located at the diffusion region 4
Interior, the import of the first passage 20 is connected to the diffusion region 4.After oxygen is entered by the first import 21, into diffusion region 4,
Be not provided with baffle or channel in diffusion region 4, allow oxygen in diffusion region 4 after free diffusing, then by diffusion region 4 enter respectively with diffusion
In the first passage 20 that area 4 is connected to, effectively realizing in each first passage 20 has oxygen stream to enter, to guarantee oxygen in pole plate
It is spread more evenly in 1.
As shown in Figure 1, several diversion trenches 41 are provided in the diffusion region 4, the diversion trench 41 and first import
21 connections.；Diversion trench 41 is convenient for introducing oxygen into diffusion region 4.
In addition, oxygen is entered in diffusion region 4 by entrance, through first passage 20 is expelled to first outlet 22 again, reaction is generated
Water and the complete oxygen of unreacted can all be flowed out from first outlet 22, be Accelerating Removal, as shown in Figure 1, the present invention one implement
The metal polar plate 1 provided in example, further includes: doab 5, the first outlet 22 are located in the doab 5, and described first is logical
The outlet in road 20 is connected to the doab 5, and oxygen and product water first converge in doab 5, and confluence can realize effluent
Acceleration so that the expulsion efficiency of oxygen and product water is higher.In addition, as seen from the figure, first passage 20 can connect in the present embodiment
Lead to the diffusion region 4 and the doab 5.
As shown in Figure 1, the doab 5 is provided with several confluence runners (51), in the embodiment of the present invention with every two phase
The adjacent first passage 20 is one group, and first passage 20 described in every group is connected to the same confluence runner 51.Reaction gas
Enter diffusion region 4, first passage 20 from first gas inlet, in the flow field that the arrangement of first passage 20 is constituted after completion of the reaction again
By doab 5, flow passage gradual change, confluence 51 quantity of runner halves compared with the quantity of first passage 20, and originally adjacent 2 first lead to
The confluence of road 20 is 1 confluence runner 51, so that the air velocity of reaction gas outlet increases, the reaction of cathode plate 1 is generated
Water then can use high speed tail gas and take away.
In addition, as shown in Figure 1, the position of the position of the diffusion region 4 and the doab 5 is about institute in the present embodiment
It is symmetrical to state the type heart.
In the present embodiment, cooling-water duct 30 change it is previous enter from 1 side of pole plate, but directly from the middle part of pole plate 1
Into.Cooling water enters the cooling-water duct 30 that crack is formed between two pole plates 1 through cooling water inlet 31, along crack toward cold
But the surrounding diffusion of water inlet 31, and the reaction heat for carrying out pole plate 1 is cooling.Meanwhile in the present embodiment, the cooling water outlet 32
Multiple, and each being equidistant to the type heart of the cooling water outlet 32 is provided with along the edge of the pole plate 1, so that cooling
More convenient and quicker is discharged in water.
Wherein, as shown in Figure 1, setting four for cooling water outlet 32 in the metal polar plate 1 that one embodiment of the invention provides
It is a, and the central angle that the every two adjacent cooling water outlet and the type heart are constituted is 90 °.According to 90 DEG C of arrangement
Be opened in 1 surrounding of pole plate, by cooled down in the middle part of pole plate 1 cooling water after pole plate 1 along cooling-water duct 3 flow to 4 water outlets into
Row is drained, and draining angle more comprehensively, is processed more convenient.
In view of the commercialization of metal polar plate 1 in the prior art, the pole plate 1 of same size can be prepared, and as needed
Which kind of reaction gas selection fills.As shown in Figure 1, also being set on pole plate 1 in the metal polar plate 1 that one embodiment of the invention provides
Set: second channel 60, the pole plate 1 are provided with the second import 61 and second outlet 62, and second import 61 passes through described
Second channel 60 is connected to the second outlet 62.In the present embodiment, second channel 60 can be used to walk hydrogen.
As shown in Figure 1, the reaction gas of two sides can be distributed more evenly when to guarantee that two pieces of pole plates 1 are used cooperatively, this
Invent an embodiment offer metal polar plate 1 in, the second channel 60 be it is arc-shaped, the second channel 60 is set to every two
Between a adjacent first passage 20；Several second channels 60 are symmetrical arranged in the two sides of the straight line, and each
The second channel (60) of side is respectively positioned on using the type heart as in the fan-shaped region in the center of circle；Second channel 60 is logical with described first
The alternate setting in road 20, in this way, the yin-yang end in two pole plates 1 being used cooperatively can effecting reaction.
As shown in Figure 1, second channel 6 can be adapted with first passage 2, it is equipped with as arc.And second channel 6 exists
Each gas access, exit also need to detour, and also realize normal circulation.
In preferred design structure shown in FIG. 1, second import 61 and 62 place straight line of the second outlet and institute
It states the first import 21 and 22 place straight line of the first outlet is mutually perpendicular to, intersection point is the type heart, guarantees 1 flow field of pole plate
The aesthetics of fluency and pole plate 1.The pole plate 1 in the present embodiment is selected to may act as anode plate 1, can also be used as cathode plate
1, be more convenient for oxygen diffusion and the discharge (setting of diffusion region 4 and doab 5) of oxygen flow field design, hydrogen runner are arranged then
Meet the characteristics of hydrogen is easily spread.
The pole plate 1 referred in above-described embodiment can be center symmetric figure, for example, the pole plate 1 is provided in round or side
Shape, the pole plate 1 of such shape are convenient for the symmetric design in flow field, are also convenient for the inlet and outlet of above-mentioned each gas inlet and outlet, cooling water
Arrangement.Wherein, it may be configured as the structure of circular metal plate, the type heart is the center of circle of the pole plate 1, using circular structural
The import of reaction water is arranged in flow field medium position matter, and the discharge of cooling water is more convenient smooth.
Another embodiment of the present invention provides a kind of metal double polar plates, including two pole plates, shape between the adjacent pole plate 1
At the cooling-water duct 30.
A kind of fuel cell that further embodiment of this invention provides, including above-mentioned metal polar plate 1.The main structure of fuel cell
At component are as follows: end plate, bipolar plates 1 (also known as partition), membrane electrode (including carbon paper diffusion layer, dielectric film, Catalytic Layer), bipolar plates
Diffusion layer is arranged in 1 side, membrane electrode is arranged in side, and diffusion layer, membrane electrode fix (and sealing with sealing strip) with end plate respectively.
It is provided with location hole 11 on pole plate 1, is assembled convenient for each structure of fuel cell.
Oxygen enters the first import 21 through the oxygen channel of end plate, equal distributing gas through the diversion trench 41 inside end plate
It is even；Subsequent oxygen, which enters after the sufficiently diffusion of diffusion region 4, enters the first passage 20 as reaction main channel, in the present embodiment entirely
Reactive flowfield is arc-shaped；Gas enters after first passage 20 is evenly distributed, then with the proton exchange membrane that is covered on 1 surface of pole plate
Contact receives the hydrogen proton after proton exchange Membrane catalysis, is generating water close to oxygen outlet side reaction；It is not reacted
Oxygen tail gas is as first passage 20 is in the acceleration of doab 5, while the reaction for taking away cathode end generates water.
A kind of fuel cell and its metal polar plate 1 provided in an embodiment of the present invention have following counting effects:
In 1 middle part (type heart position) aperture of pole plate as cooling water inlet 31, low-temperature cooling water is introduced into reactive moieties heat
The middle part most concentrated is measured, the mode of cooling water surrounding overflow carries out fuel cell reaction heat heat dissipation, and cooling effect is more preferable and easy
In draining；
Centered at the type heart of pole plate 1, first passage 2 and second channel 60 provided with several annular spreads make
During bipolar plates 1, guarantee that reactant distribution is uniform, guarantees that electrochemical reaction is abundant；
Halved using arc-shaped reactive flowfield in tail gas portion of runner quantity, to directly increase the gas velocity of tail gas
Degree, generation water will be reacted by, which being more conducive to, takes pile pole plate 1 out of, prevents battery water logging.
In the description of the present invention, it is to be understood that, term " on ", "lower", "vertical", "horizontal", "top", "bottom",
The orientation or positional relationship of the instructions such as "inner", "outside", " clockwise ", " counterclockwise " is that orientation based on the figure or position are closed
Corresponding orientation when system namely air-conditioning normal mounting.Be merely for convenience of description of the present invention and simplification of the description, rather than indicate or
It implies that signified equipment or element must have a particular orientation, is constructed and operated in a specific orientation, therefore should not be understood as
Limitation of the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (16)
1. a kind of metal polar plate characterized by comprising first passage (20), the pole plate (1) are provided with the first import (21)
And first outlet (22), first import (21) are connected to by the first passage (20) with the first outlet (22)；
It is provided with cooling water inlet (31) at the type heart of the pole plate (1), the edge of the pole plate (1) is provided with cooling water outlet
(32), the cooling water inlet (31) is connected to the cooling water outlet (32) by cooling-water duct (30).
2. metal polar plate according to claim 1, which is characterized in that the first passage (20) is arc-shaped；Described
One channel (20) is set as several, and several first passages (20) are respectively positioned on using the type heart as on the concentric circles in the center of circle.
3. metal polar plate according to claim 2, which is characterized in that connection first import (21), described first go out
In line, several first passages (20) are symmetrical arranged in the two sides of the straight line for mouth (22) and the type heart, and every
The first passage (20) of side is respectively positioned on using the type heart as in the fan-shaped region in the center of circle.
4. metal polar plate according to claim 3, which is characterized in that positioned at the every two adjacent of described straight line the same side
The distance between the first passage (20) is equal.
5. metal polar plate according to claim 3, which is characterized in that further include: second channel (60), the pole plate (1)
It is provided with the second import (61) and second outlet (62), second import (61) passes through the second channel (60) and described the
Two outlet (62) connections.
6. metal polar plate according to claim 5, which is characterized in that the second channel (60) be it is arc-shaped, described the
Two channels (60) are set between the every two adjacent first passage (20)；
Several second channels (60) are symmetrical arranged in the two sides of the straight line, and the second channel (60) of every side is equal
In the fan-shaped region using the type heart as the center of circle.
7. metal polar plate according to claim 5, which is characterized in that second import (61) and the second outlet
(62) straight line where is mutually perpendicular to straight line where first import (21) and the first outlet (22), and intersection point is the type
The heart.
8. metal polar plate according to claim 1-4, which is characterized in that further include: diffusion region (4), described
One import (21) is located in the diffusion region (4), and the import of the first passage (20) is connected to the diffusion region (4).
9. metal polar plate according to claim 8, which is characterized in that be provided with several diversion trenches in the diffusion region (4)
(41), the diversion trench (41) is connected to first import (21).
10. metal polar plate according to claim 1-4, which is characterized in that further include: doab (5), described
One outlet (22) is located in the doab (5), and the outlet of the first passage (2) is connected to the doab (5).
11. metal polar plate according to claim 10, which is characterized in that the doab (5) is provided with several confluence streams
Road (51), with the every two adjacent first passage (20) for one group, first passage described in every group (20) and the same remittance
Flow runner (51) connection.
12. metal polar plate according to claim 1-4, which is characterized in that the cooling water outlet (32) is along institute
The edge for stating pole plate (1) is provided with multiple, and each cooling water outlet (32) being equidistant to the type heart.
13. metal polar plate according to claim 12, which is characterized in that there are four cooling water outlet (32) settings,
The central angle that the every two adjacent cooling water outlet and the type heart are constituted is 90 °.
14. metal polar plate according to claim 1-4, which is characterized in that the type heart is the pole plate (1)
The center of circle.
15. a kind of metal double polar plates, which is characterized in that including two pole plates, the pole plate is any one of claim 1-14 institute
The metal polar plate stated；The cooling-water duct (30) are formed between the adjacent pole plate (1).
16. a kind of fuel cell, which is characterized in that including the described in any item metal polar plates of claim 1-14 (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910253039.7A CN109950572A (en) | 2019-03-29 | 2019-03-29 | Fuel cell and metal polar plate and bipolar plate thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910253039.7A CN109950572A (en) | 2019-03-29 | 2019-03-29 | Fuel cell and metal polar plate and bipolar plate thereof |
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| CN109950572A true CN109950572A (en) | 2019-06-28 |
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| CN201910253039.7A Pending CN109950572A (en) | 2019-03-29 | 2019-03-29 | Fuel cell and metal polar plate and bipolar plate thereof |
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| CN113488673A (en) * | 2021-06-18 | 2021-10-08 | 湖南工程学院 | Bipolar plate of fuel cell |
| CN114050285A (en) * | 2021-11-25 | 2022-02-15 | 深圳国氢新能源科技有限公司 | Circular air-cooled electric pile and single-chip battery thereof |
| CN114464839A (en) * | 2022-02-11 | 2022-05-10 | 山东大学 | Novel fuel cell stack with multistage self-preheating inlet air and control method |
| CN114865006A (en) * | 2022-04-18 | 2022-08-05 | 重庆邮电大学 | Hydrogen fuel cell with cross hydrogen channel structure |
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