CN209001026U - A kind of ripple flow-field plate - Google Patents
A kind of ripple flow-field plate Download PDFInfo
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- CN209001026U CN209001026U CN201821880847.3U CN201821880847U CN209001026U CN 209001026 U CN209001026 U CN 209001026U CN 201821880847 U CN201821880847 U CN 201821880847U CN 209001026 U CN209001026 U CN 209001026U
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- field plate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model discloses a kind of ripple flow-field plates, and for the anode flow field board of active direct methanol fuel cell, the ripple flow-field plate is provided with runner, the turbulence structure of the regular distribution of setting in the runner.The turbulence structure is the ripple struction of rule distribution, forms corrugated channel.The feature of the ripple struction is in SIN functionAsin(Wx), whereinAFor amplitude,WWave crest and wave trough for angular frequency, the ripple struction forms turbulence structure.Turbulence structure in the ripple flow-field plate of the utility model increases the wall face velocity gradient of runner, therefore, the shear rate in wall face increases, accelerate the product of anode-side --- the discharge of carbon dioxide gas, alleviate the case where fuel supply is insufficient, and battery performance declines caused by anode-side is blocked because of carbon dioxide gas.At the same time, the turbulence structure in ripple flow-field plate is more advantageous to the progress of mass transport process, to improve the output performance of battery.
Description
Technical field
The utility model relates to direct methanol fuel cell technical fields, and in particular to one kind is used for active direct methanol
The ripple flow-field plate of fuel cell.
Background technique
The electric energy that fuel cell generates directly directly is transformed by the chemical energy of raw material itself, and energy with higher
Metric density, lower environmental contamination, it is receive more and more attention along with the advantages such as rich of raw material.Wherein, phase
Hydrogen feedstock than belonging to the hydrogen fuel cell of Proton Exchange Membrane Fuel Cells produces that at high cost, storage and transportation is dangerous and use condition is severe
The factors such as quarter, belong to similar direct methanol fuel cell using methanol as anode material, (generally exist because its operating temperature is low
Working and room temperature), theoretical specific energy it is high, it is easy to carry and using it is safe the features such as have good application prospect, thought by industry
It is the types of fuel cells for being most hopeful to take the lead in realizing the marketization.
For anodic product carbon dioxide blockage and cathode product water slug, product problem of management is belonged to, product generates
Afterwards, it is entered in flow field by porous gas diffusion layer, suitable porous gas diffusion layer and flow field structure will be helpful to product
Otherwise timely and effective disengaging and discharge will will affect the distribution of reactant, or even barrier completely, can not provide for electrochemical reaction
Basic fuel supply, causes battery performance to reduce, or even stop working.Therefore, for this respect, the product management at the two poles of the earth
Problem is a part urgently to be resolved in direct methanol fuel cell, be can not be ignored.
Currently, study subject of the most researcher when solving product problem of management is the structure of collector plate, but big
Partial probe into is spy in the direct methanol fuel cell for concentrate on passive type, and to active direct methanol fuel cell
Study carefully less, but the power density of the latter is higher, has more application value, therefore its product management should more be paid attention to.
At the same time, traditional flow-field plate is more the overall distribution for changing runner, the single flow channel in convection current field plate
Structure concern is less, therefore, in the utility model, turbulence structure is added in single flow channel, and thus development is structure
Feature is in the corrugated channel of SIN function.Turbulence structure in ripple flow-field plate increases the wall face velocity gradient of runner, because
This, the shear rate in wall face increases, accelerate the product of anode-side --- the discharge of carbon dioxide gas alleviates anode-side
The case where fuel supply is insufficient caused by blocking because of carbon dioxide gas, and battery performance declines.At the same time, in ripple flow-field plate
Turbulence structure be more advantageous to the progress of mass transport process, to improve the output performance of battery.
Utility model content
In order to be effectively relieved active direct methanol fuel cell anode side gas clogging, mass transfer enhancement process, from
And improve the output performance of battery.The utility model discloses a kind of ripple flow-field plates.The ripple flow-field plate is for active
Direct methanol fuel cell, the active direct methanol fuel cell include left side end plate, PVC silicagel pad, cathode flow field plate,
PTFE pad, membrane electrode assembly, PTFE pad, anode flow field board, PVC silicagel pad, right side end plate, bolt group.The ripple flow-field plate
Anode-side for the active direct methanol fuel cell.
The utility model adopts the following technical solution realizes:
A kind of ripple flow-field plate, for the anode flow field board of active direct methanol fuel cell, the ripple flow-field plate
It is provided with runner, the turbulence structure of the regular distribution of setting in the runner.
Further, the turbulence structure is the ripple struction of rule distribution, forms corrugated channel.
Further, the feature of the ripple struction is in SIN functionAsin(Wx), whereinAFor amplitude,WFor angular frequency,
The Wave crest and wave trough of the ripple struction forms turbulence structure.
Further, the amplitudeAValue range is 0.05 ~ 0.2, the angular frequencyWValue range is 1 ~ 5.
Further, the material of the ripple flow-field plate is conductive metal.
Further, the conductive metal includes steel alloy, aluminium alloy, copper alloy.
Further, the steel alloy includes stainless steel.
Further, the finish minimum 0.3 of the ripple flow field plate faces, the interior table of ripple flow-field plate runner
Face finish minimum 0.8.
Further, the serpentine-like distribution of flow passage structure in the ripple flow-field plate.
Further, the corner of each runner of ripple flow-field plate is round-corner transition.
Compared with prior art, the utility model has the following beneficial effects:
1, in traditional direct methanol fuel cell, flow-field plate and collector plate separation, so that battery total quality increases, electricity
Pond internal resistance increases, and the ripple flow-field plate of the utility model design is the integration of traditional flow-field plate sum aggregate battery plate, both plays
It is uniformly distributed the effect of reactant and product, also plays the role of collecting electronics.
2, traditional flow-field plate is more the overall distribution for changing runner, the structure concern of the single flow channel in convection current field plate
It is less, in the utility model, turbulence structure is added in single flow channel, and it is in SIN function that thus development, which is structure feature,Asin(Wx) corrugated channel.
3, traditional flow-field plate is not obvious the promotion of battery performance, and in the utility model, because in ripple flow-field plate
Turbulence structure, so that the wall face velocity gradient of runner increases, thus, the shear rate in wall face increases, and accelerates the life of anode-side
At object --- the discharge of carbon dioxide gas alleviates fuel supply deficiency caused by anode-side is blocked because of carbon dioxide gas,
The case where battery performance declines.At the same time, the turbulence structure in ripple flow-field plate is more advantageous to the progress of mass transport process, thus
Improve the output performance of battery.
Detailed description of the invention
Fig. 1 is active direct methanol fuel cell front view；
The ripple flow-field plate front view of Fig. 2 the utility model embodiment；
Fig. 3 is existing common fillet fluid flow on channel plate front view；
Fig. 4 is existing ordinary straight angular flux road flow-field plate front view；
Fig. 5 is under different methanol supply flow rates, and active direct methanol fuel cell uses common fillet fluid flow on channel
Battery performance curve of output corresponding to plate；
Fig. 6 is under different methanol supply flow rates, and active direct methanol fuel cell uses corresponding to ripple flow-field plate
Battery performance curve of output；
Fig. 7 is in the case where different methanol supply concentration, and active direct methanol fuel cell uses common fillet flow-field plate institute
Corresponding battery performance curve of output；
Fig. 8 is in the case where different methanol supply concentration, and active direct methanol fuel cell uses corresponding to ripple flow-field plate
Battery performance curve of output；
As shown in the figure are as follows: end plate on the left of 1-；The first PVC silicagel pad of 2-；3- cathode flow field plate；4- membrane electrode assembly；5- sun
Pole flow-field plate；The 2nd PVC silicagel pad of 6-；End plate on the right side of 7-；8- bolt group；The first PTFE of 9- pad；The 2nd PTFE of 10- pad.
Specific embodiment
To further understand the utility model, the utility model is described further with reference to the accompanying drawing.But it needs
Illustrate, the range of the requires of the utility model protection is not limited to the range of following embodiment statement.
As shown in Figure 1, the active direct methanol fuel cell, composed structure are from left to right followed successively by, left side
End plate 1, the first PVC silicagel pad 2, cathode flow field plate 3, the first PTFE pad 9, membrane electrode assembly 4, the 2nd PTFE pad 10, anode stream
Field plate 5, the 2nd PVC silicagel pad 6, right side end plate 7, bolt group 8.Wherein end-plate material is all made of the transparent acrylic of high transparency
Plate, size are 60mm × 60mm, and with a thickness of 15mm, surrounding is machined with the bolt hole of 8 diameter 5mm.Each layer assembly passes through 8 M4
The bolt group locking that bolt is constituted, each bolt are tightened by torque spanner, torque 1.6Nm.
Wherein, the membrane electrode assembly 4 is made of membrane electrode and PTFE seal pad (with a thickness of 0.2mm).In this example
Homemade all membrane electrodes are gas-diffusion electrode, mainly include anode gas diffusion electrode, cathode gas diffusion electrode and
Proton exchange membrane.Wherein, gas-diffusion electrode is made of substrate and Catalytic Layer, and substrate is made of supporting layer and microporous layers again.Branch
Layer is supportted using the dedicated carbon paper of TGP-H-060 model fuel cell of Toray company, Japan.Microporous layers main component is conductive black
(Vulcan XC72, U.S. E-TEK), is formed in one side surface of supporting layer.Catalyst fines (U.S. Johnson Matthey)
After the mixing of appropriate isopropanol analytical reagents, suspending uniformly, catalyst pulp is formed, by its even application in microporous layers table
Face forms Catalytic Layer.Anode is Pt-Ru catalyst, carrying capacity 4mgcm-2, cathode is Pt catalyst, carrying capacity 2mgcm-2.Proton exchange membrane uses the 117 type dielectric film of commercial Nafion of DuPont.Proton exchange membrane is needed before use
It is pre-processed, is successively soaked in hydrogen peroxide, deionized water, the 0.5molL of volume fraction 5%-1Dilution heat of sulfuric acid and go
Each 1h in ionized water, each solution is at 80 DEG C during immersion, with remove respectively Surface modification of proton exchange membrane organic impurities,
Remaining hydrogen peroxide reagent, metal impurities and remaining sulfuric acid.Proton exchange membrane after pretreatment is good is soaked in deionized water
It saves, takes out when use and be put in naturally dry in air.The anode gas diffusion electrode and cathode gas diffusion electrode prepared
By respective Catalytic Layer one side to proton exchange membrane, it is placed in intermediate region, is put into hot press, forms membrane electrode after hot pressing,
Hot pressing pressure is 10MPa, and temperature is 120 DEG C, time 2min.Membrane electrode after preparation is put into sealed sample bag and saves.
Embodiment one:
Under different methanol supply flow rates, the electricity of the utility model New type corrugated flow-field plate and traditional round angular flux field plate is studied
Pond output performance.As shown in Fig. 2, the anode flow field board 5 of active direct methanol fuel cell is practical new using this in experimental group
The ripple flow-field plate of type, corrugation patterns are in SIN function 0.1sin (5x), material is stainless steel, the light of ripple flow field plate faces
Cleanliness is 0.3, and the inner surface finish of ripple flow-field plate runner is 0.8.The ripple flow-field plate processing flow, which is broadly divided into, to be fallen
Expect, be heat-treated, middle wire wire cutting low current forms at a slow speed, electrobrightening procedure of processing；Active direct methanol fuel cell
Cathode flow field plate 3 use conventional orthogonal flow-field plate, as shown in Figure 4.Experimental comparison group is set up, it is active direct in control group
The anode flow field board 5 of methanol fuel cell uses traditional round angular flux field plate, as shown in figure 3, the flow-field plate of its cathode side still uses
Conventional orthogonal flow-field plate, as shown in Figure 4.Width of flow path in anode flow field board 5 is 1.2mm, 5 lower-left of anode flow field board and upper right
It is provided with the import circular hole and outlet circular hole of fuel, radius 1mm, anode flow field board 5 is with a thickness of 1.5mm.Methanol supply is dense
Degree is set as 2molL-1, 5 groups are arranged altogether, is respectively as follows: 0.2 mLmin methanol supply stream magnitude-1、0.5mL·min-1、
1mL·min-1、2mL·min-1、4mL·min-1.Cathode oxygen supply flow rate is 100sccm.The cell output of the two
As shown in Figure 5 and Figure 6.It is learnt by corresponding performance curve of output, the corresponding battery of traditional flow-field plate is in 1mLmin-1It obtains most
Big value, and the corresponding battery of ripple flow-field plate is in 2mLmin-1Obtain maximum value.It is 2mLmin in methanol flow-1When, electricity
It is compared using ripple flow-field plate and uses right angle flow-field plate, performance boost 13.4% in pond., it is apparent that ripple flow-field plate can be relieved electricity
Pond anodic gas clogging, and reinforce mass transport process, to promote battery performance.
Embodiment two:
In the case where different methanol supplies concentration, research the utility model New type corrugated flow-field plate and traditional round angular flux field plate
Cell output.As shown in Fig. 2, the anode flow field board 5 of active direct methanol fuel cell is practical using this in experimental group
Novel ripple flow-field plate, corrugation patterns are in SIN function 0.1sin (5x), material is stainless steel, the ripple flow-field plate table
The finish in face minimum 0.3, the inner surface finish minimum 0.8 of ripple flow-field plate runner.The ripple flow-field plate processing
Process is broadly divided into blanking, heat treatment, middle wire wire cutting low current form at a slow speed, electrobrightening procedure of processing；It is active straight
The cathode flow field plate 3 for connecing methanol fuel cell uses conventional orthogonal flow-field plate, as shown in Figure 4.Set up experimental comparison group, control group
In active direct methanol fuel cell anode flow field board 5 use traditional round angular flux field plate, as shown in figure 3, its cathode stream
Field plate 3 still uses conventional orthogonal flow-field plate, as shown in Figure 4.Width of flow path in flow-field plate is 1.2mm, flow-field plate lower-left and the right side
On be provided with fuel import circular hole and outlet circular hole, radius 1mm, whole flow-field plate is with a thickness of 1.5mm.Methanol supply stream
Amount is set as in embodiment one, performance output corresponding methanol supply flow rate, as 2 mLmin when optimal-1, methanol supplies dense
6 groups of degree setting, is respectively as follows: 0.5molL-1、2mol·L-1、4mol·L-1、6mol·L-1、8mol·L-1、10mol·L-1。
Cathode oxygen supply flow rate is 100sccm.The cell output of the two is as shown in Figure 7 and Figure 8.It is exported by corresponding performance
Curve learns that battery performance corresponding to traditional flow-field plate and ripple flow-field plate is in 8molL-1Obtain maximum value.In methanol
Supply concentration is 8molL-1When, battery is compared using ripple flow-field plate and uses right angle flow-field plate, performance boost 7.96%.Obviously
As it can be seen that ripple flow-field plate can be relieved cell anode gas clogging, and reinforce mass transport process, to promote battery performance.
The above embodiments of the present invention is merely examples for clearly illustrating the present invention, and is not
Limitations of the embodiments of the present invention.For those of ordinary skill in the art, on above explained basis
On can also make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.
Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in this reality
Within novel scope of protection of the claims.
Claims (10)
1. a kind of ripple flow-field plate, the anode flow field board for active direct methanol fuel cell, which is characterized in that the wave
Line flow-field plate is provided with runner, the turbulence structure of the regular distribution of setting in the runner.
2. ripple flow-field plate according to claim 1, it is characterised in that: the turbulence structure is the ripple knot of rule distribution
Structure forms corrugated channel.
3. ripple flow-field plate according to claim 2, it is characterised in that: the feature of the ripple struction is in SIN functionAsin(Wx), whereinAFor amplitude,WWave crest and wave trough for angular frequency, the ripple struction forms turbulence structure.
4. ripple flow-field plate according to claim 3, it is characterised in that: the amplitudeAValue range is 0.05 ~ 0.2,
The angular frequencyWValue range is 1 ~ 5.
5. ripple flow-field plate according to claim 1, it is characterised in that: the material of the ripple flow-field plate is conductive gold
Belong to.
6. ripple flow-field plate according to claim 5, it is characterised in that: the conductive metal includes steel alloy, and aluminium closes
Gold, copper alloy.
7. ripple flow-field plate according to claim 6, it is characterised in that: the steel alloy includes stainless steel.
8. ripple flow-field plate according to claim 1, it is characterised in that: the finish of the ripple flow field plate faces is minimum
It is 0.3, the inner surface finish minimum 0.8 of ripple flow-field plate runner.
9. ripple flow-field plate according to claim 1, it is characterised in that: serpentine-like point of the runner in the ripple flow-field plate
Cloth.
10. ripple flow-field plate according to claim 8, it is characterised in that: the corner of each runner of ripple flow-field plate
For round-corner transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821880847.3U CN209001026U (en) | 2018-11-15 | 2018-11-15 | A kind of ripple flow-field plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821880847.3U CN209001026U (en) | 2018-11-15 | 2018-11-15 | A kind of ripple flow-field plate |
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| CN209001026U true CN209001026U (en) | 2019-06-18 |
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| CN201821880847.3U Active CN209001026U (en) | 2018-11-15 | 2018-11-15 | A kind of ripple flow-field plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390603A (en) * | 2018-11-15 | 2019-02-26 | 华南理工大学 | A kind of ripple flow-field plate |
| CN113675424A (en) * | 2021-07-27 | 2021-11-19 | 华南理工大学 | Derived corrugated flow field plate based on sine corrugations |
-
2018
- 2018-11-15 CN CN201821880847.3U patent/CN209001026U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390603A (en) * | 2018-11-15 | 2019-02-26 | 华南理工大学 | A kind of ripple flow-field plate |
| CN113675424A (en) * | 2021-07-27 | 2021-11-19 | 华南理工大学 | Derived corrugated flow field plate based on sine corrugations |
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