CN209001031U - A kind of direct methanol fuel cell heap - Google Patents
A kind of direct methanol fuel cell heap Download PDFInfo
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- CN209001031U CN209001031U CN201821683108.5U CN201821683108U CN209001031U CN 209001031 U CN209001031 U CN 209001031U CN 201821683108 U CN201821683108 U CN 201821683108U CN 209001031 U CN209001031 U CN 209001031U
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- anode
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- fuel cell
- stretching nets
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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 direct methanol fuel cell heaps.Monocells at different levels in the battery pile include membrane electrode assembly, positioned at the collector plate of membrane electrode assembly two sides, the bipolar support plate of the anode on the outside of collector plate and cathode branch fagging, positioned at the right side anode-supported plate and left side anode-supported plate at battery pile both ends；It further include bolt group, Elecrical connector, priming device and peripheral circuit control system；It is Elecrical connector and priming device above the battery pile；The anode collector plate and cathode collector plate are that flow-field plate is integrated with collector, are composed of conductive lead frame and conductive fish scale-shaped stretching nets.The utility model can effectively mitigate the weight of battery pile, in addition, stretching nets flood the water logging phenomenon with cathode as the gas that the flow-field plate of anode and cathode can effectively alleviate anode, to more preferably realize full passive type fuel cell heap.Meanwhile the application of stretching nets also helps the internal resistance for reducing battery, improves the output performance of battery.
Description
Technical field
The utility model relates to direct methanol fuel cell technical fields, and in particular to a kind of direct methanol fuel cell
Heap.
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.
Caused by " gas floods " and cathode water slug for caused by anode carbon dioxide blockage " water logging ", product tube is belonged to
Reason problem is entered in flow field after product generates by porous gas diffusion layer, suitable porous gas diffusion layer and flow field knot
Structure will be helpful to the timely and effective disengaging of product and discharge, otherwise will will affect the distribution of reactant, or even barrier completely, Wu Fawei
Electrochemical reaction provides basic fuel supply, causes battery performance to reduce, or even stop working.Therefore, for this respect,
The product problem of management at the two poles of the earth is a part urgently to be resolved in DMFC, 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 to concentrate on the direct methanol fuel monocell of passive type, and to the direct methanol fuel cell heap of passive type
Probe into less, but the product management in the latter is even more important compared to for the former, and there are higher application values.It is same with this
When, traditional collector plate is mostly two-dimensional structure, and processing technology is cumbersome, and processing cost is higher.It adds, traditional collector plate is whole
It is metal material, while leading to the increase of battery pile weight, so that the resistance of inside battery also increases accordingly.The utility model
In, the most composition element of battery is all made of epoxide resin material, and the weight and the internal resistance of cell of battery pile is effectively reduced.Again
Person, a part of stretching nets as collector plate, is formed by equipment Pressing Deformation, and fabricated part is in three-dimensional structure.It is processing
In the process, there is only plastic deformations for stretching nets, and no waste mine generates, and save the step such as heat treatment, wire cutting, polishing of traditional processing
Suddenly, time and economic cost are saved.Further, stretching nets are conducive to the discharge of anode carbon dioxide gas, alleviate anode " gas
It floods ".Stretching nets are also conducive to cathode water droplet forming aquaporin, alleviate cathode " water logging ", thus have been better achieved entirely passively
The direct methanol fuel cell heap of formula.
Utility model content
In order to effectively mitigate the weight of battery pile, " water logging " of " gas floods " and cathode of effectively alleviating anode is existing
As to more preferably realize full passive type fuel cell heap, and reducing the internal resistance of battery, improving the output performance of battery, this reality
A kind of direct methanol fuel cell heap is disclosed with novel.
A kind of direct methanol fuel cell heap, the monocells at different levels in battery pile include membrane electrode assembly 6, are located at membrane electrode
The anode collector plate and cathode collector plate of component two sides, the anode being located on the outside of anode collector plate and cathode collector plate are bipolar
Support plate 5 and cathode branch fagging 4, right side anode-supported plate 3 and left side anode-supported plate 7 positioned at battery pile both ends；
Battery pile further includes bolt group 2, Elecrical connector 8, priming device 1 and peripheral circuit control system for fixing
System；The priming device (1) is located at the top of Elecrical connector (8)；It is conductive connection above the fuel cell stack
Device and priming device；The anode collector plate and cathode collector plate is that flow-field plate is integrated with collector, anode collector plate
It is composed of with cathode collector plate metallic conduction lead frame and conductive fish scale-shaped stretching nets.
Preferably, membrane electrode assembly includes anode and cathode porous gas diffusion layer, anode and cathode Catalytic Layer and proton exchange membrane.
Preferably, the stretching nets have three-dimensional structure, are embedded in metallic conduction lead frame for an individual part.
Preferably, the material of the metallic conduction lead frame and stretching nets is Stainless steel 316.
Preferably, the stretching nets, both play the role of flow-field plate, evenly distribute fuel, while playing conductive work
With conduction electronics.
Preferably, in anode collector plate, stretching nets are horizontal positioned, the coarse membrane electrode for being affixed on anode-side on one side, anode
5 cylindrical bodies are taken to support stretching nets in the middle part of bipolar support plate 5；And in cathode collector plate, stretching nets are placed vertically, with
Stretching nets in anode collector plate differ 90 degree, and the coarse membrane electrode for being affixed on cathode side on one side, cathode branch fagging middle part is using flat
Row rib structure supports stretching nets.
Preferably, the Elecrical connector 8 is by printed circuit board 12, elastic sheet metal 11 and Single-end output connector 13
It is composed；The Elecrical connector is equipped with elastic metallic on the basis of printed circuit board using printed electronics technique
Piece and Single-end output connector；The metallic conduction lead frame is communicated by elastic sheet metal 11 with Elecrical connector 8, Ge Jidan
Battery can then be connected by Elecrical connector 8, and be welded with Single-end output connector 13 at 12 both ends of printed circuit board, be realized
Circuit output, so as to the access of load.
Preferably, the bipolar support plate 5 of the anode and cathode branch fagging 4 are epoxide resin material.
Preferably, at the middle part of the bipolar support plate 5 of anode, support construction is 5 cylindrical bodies, plays the work of support stretching nets
With；At the middle part of cathode branch fagging 4, support construction is parallel ribs, plays a part of to support stretching nets.
Preferably, the bipolar support plate 5 of the anode is bipolar plates, has the support construction and fuel cavity of two-stage battery,
And it is provided with gas vent, gas-liquid separation membrane is posted in inside, prevents fuel losses and discharge exhaust gas.
Preferably, the function of peripheral circuit control system and the polarization curve of battery match, battery pile output
Afterwards, it is exported after DC-DC converter unit and Direct Current Distribution Unit in control circuit to electrical equipment or energy storage device,
In, it further include routing inspection unit and circuit protection unit in control circuit.
Compared with prior art, the utility model has the following beneficial effects:
1, traditional collector plate is designed as two-dimensional structure mostly, is not obvious to the improvement of battery pile product management effect,
Simultaneously because it is excessive with membrane electrode contact area and causes the supply of oxygen, methanol fuel insufficient, battery performance is caused to improve
It is unobvious, and stretching nets have three-dimensional structure, greatly reduce with membrane electrode contact area, while product management can either be improved
Also ensure that the supply of fuel is abundant.
2, both stretching nets and conductive lead frame combine to form collector plate, avoid that traditional collector plate weight is big, and consumptive material is more
And lead to the shortcomings that portability is poor, the internal resistance of cell increases.
3, a part of stretching nets as collector plate is formed by equipment Pressing Deformation, and fabricated part is in three-dimensional structure.
In process, there is only plastic deformations for stretching nets, and no waste mine generates, and saves the heat treatment, wire cutting, throwing of traditional processing
Light and etc., save time and economic cost.
4, the bipolar support plate of anode and cathode branch fagging are all made of epoxide resin material and are made, and raw material is easy to obtain,
Low in cost, processability is good, achievees the effect that insulation, prevents the weight that battery is also significantly reduced while internal short-circuit of battery
Amount, achievees the effect that lightweight, portability.
5, above battery pile, Elecrical connector is fabricated to based on electron printing, in each hole, metal elastic is added
Piece reduces contact resistance so that it is in close contact with conductive lead frames at different levels.
6, the priming device above battery pile alleviates repeat the cumbersome of supply fuel step by step to a certain extent, reaches
To the purpose of disposable fluid injection.
Detailed description of the invention
Fig. 1 is battery pile overall top view；
Fig. 2 is battery pile entirety front view；
Fig. 3 is Elecrical connector back schematic diagram；
Fig. 4 is the front view of anode conducting lead frame, right view.
Fig. 5 is the front view of cathode conduction lead frame, right view.
Fig. 6 a, Fig. 6 b are the internal structure and external structure schematic diagram of cathode branch fagging respectively.
Fig. 7 a, Fig. 7 b are the internal structure and external structure schematic diagram of anode-supported plate respectively.
Fig. 8 is positive (shiny surface) schematic diagram of fish scale-shaped stretching nets.
Fig. 9 is fish scale-shaped stretching nets reverse side (rough surface) schematic diagram.
Figure 10 is battery pile output control circuit schematic diagram.
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.
The membrane electrode assembly 6 of the utility model is made of membrane electrode and PTFE seal pad (with a thickness of 0.2mm).In this example
All membrane electrodes are gas-diffusion electrode, mainly include that anode gas diffusion electrode, cathode gas diffusion electrode and proton are handed over
Change film.Wherein, gas-diffusion electrode is made of substrate and Catalytic Layer, and substrate is made of supporting layer and microporous layers again.Supporting layer is adopted
With the dedicated carbon paper of TGP-H-060 model fuel cell of Japanese Toray company.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 from
Each 1h in sub- water, each solution is at 80 DEG C during immersion, to remove the organic impurities, residual of Surface modification of proton exchange membrane respectively
Hydrogen peroxide reagent, metal impurities and the remaining sulfuric acid stayed.Proton exchange membrane after pretreatment is good, which is soaked in deionized water, protects
It deposits, takes out when use and be put in naturally dry in air.The anode gas diffusion electrode and cathode gas diffusion electrode prepared will
Respective Catalytic Layer one side is placed in intermediate region, is put into hot press, form membrane electrode after hot pressing to proton exchange membrane, heat
Pressure pressure is 10MPa, and temperature is 120 DEG C, time 2min.Membrane electrode after preparation is put into sealed sample bag and saves.
Such as Fig. 8 and stretching web frame shown in Fig. 9, there are different structure features in the front and back sides of stretching nets, are especially saving
At point, positive connecting node is more gentle smooth, and the coarse fluctuating of reverse side connecting node.Above-mentioned stretching nets pass through punching press plasticity
It deforms, i.e., certain thickness stainless steel plate is horizontally entered into from equipment back side, and the cutter moved up and down in equipment is by entrance
Stainless steel plate tear notch is simultaneously stretched, and the shape of cutter and the distance moved down determine the shape of stretching nets mesh, processing
Good stretching nets are just persistently squeezed out from equipment front.According to document, traditional stretching nets can usually carry out structure by following member
Characterization: long-pitch (Long Way of Mesh Dimension, abbreviation LWD), short pitch (Short Way of Mesh
Dimension, abbreviation SWD), obstruct wide (Strand Width, abbreviation SW) and stalk thickness (Strand Thickness, abbreviation ST),
The portion size of stretching web frame in attached drawing is as follows, long-pitch 4mm, and short pitch 2.5mm, stalk width are 1mm, and stalk thickness is
0.5mm, whole size are 60mm60mm.
As shown in Figure 1, Figure 2 and shown in Fig. 3, in the fuel cell pack, in anode-side, stretching nets and anode conducting lead frame
Both 10 combinations are placed in the bipolar support plate 5 of anode, in the middle part of the bipolar support plate 5 of anode using five-point type to anode stretching nets into
Row support.Wherein, stretching nets are placed horizontally in anode conducting lead frame 10, and its rough surface is affixed to the side of membrane electrode,
Assembly mode at this time most beneficial for the carbon dioxide bubble of anode discharge, thus alleviate anode gas flood caused by it is cell performance
It can decline.And in cathode side, stretching nets are rotated by 90 ° from the horizontal position of anode conducting lead frame 9, are vertically placed on cathode and are led
In electric lead frame 9, and rough surface is affixed to membrane electrode side, the discharge of the most advantageous yin edema of this assembly mode, and because of the spy of stretching nets
Different structure accelerates the formation of aquaporin, reduces flow resistance.After the stretching nets of this side are combined with 9 the two of cathode conduction lead frame
It is placed in cathode branch fagging 4, and anode stretching nets is supported using parallel vertical rib in the middle part of cathode branch fagging 4.This is practical
Novel direct methanol fuel cell heap uses the collector plate of separate type, and it is big to avoid traditional collector plate weight, and consumptive material is more and leads
The shortcomings that internal resistance of cell of cause increases.Bipolar 5 top of support plate of anode processes liquid injection hole and venthole respectively, wherein outlet
Hole is sealed with gas-liquid separation membrane, to prevent equilibrium air pressure and discharge CO 2 waste gas while leakage.Anode is bipolar
Support plate 5 and cathode branch fagging 4 are all made of epoxide resin material and are made, and raw material is easy to obtain, low in cost, processability
It is good, and achieve the effect that insulation, prevent the weight that battery is also significantly reduced while internal short-circuit of battery.The two of battery pile
End is respectively arranged with left side anode-supported plate 7 and right pole anode-supported plate 3.Monocells at different levels by bolt group 2 stacking assembling from
And battery pile is formed, above battery pile, it is based on printed circuit board 12, forms Elecrical connector 8, and in printed circuit board 12
In each hole, metal clips 11 is added, closely to connect printed circuit board 12 and conductive lead frame, reduces contact resistance.
Monocells at different levels are connected by Elecrical connector 8, and are machined with via pad at the both ends of Elecrical connector 8, list of burn-oning
Output connector 13 is held to be convenient for the connection of external circuit load.It is priming device 1 in the top of Elecrical connector 8, infuses methanol solution
In elongated slot, fuel be will be delivered in fuel cavity bodies at different levels, is avoided repeating addition fuel step by step, be infused to fuel cavities at different levels
It is full, each hole is sealed with rubber plug.
Front view, the right view of the anode conducting lead frame of the utility model are as shown in Figure 4, Figure 5；Cathode branch fagging it is interior
Portion's structure and external structure schematic diagram are respectively as shown in Fig. 6 a, Fig. 6 b；The internal structure and external structure of anode-supported plate are illustrated
Figure is respectively as shown in Fig. 7 a, Fig. 7 b.
Fuel cell pack access load, i.e., when in running order, methanol solution is distributed by stretching nets even flow field, is hung down
Direct puncture crosses anodic porous gas diffusion layers, enters the region of anode catalyst layer.Methanol molecules and hydrone are in anode catalyst layer
In catalyst action under occur oxidation reaction, generate carbon dioxide, hydrogen ion and electronics.Carbon dioxide gas is being continuously generated
Reaction pressure under, on the whole perpendicular through anodic porous gas diffusion layers, inversely in methanol molecules moving direction, return to anode
Stretching nets in collector plate, carbon dioxide bubble agglomerate under buoyancy, move and be discharged anode-side, and hydrogen ion passes through proton
Exchange membrane reaches cathode catalysis layer region, and electronics then passes through collector plate and exports to outside batteries, is transmitted to through Elecrical connector 8
Cathode side, forming circuit.At the same time, oxygen carries out plane distribution by the stretching nets of cathode side, expands perpendicular to porous gas
Scattered layer is transmitted, and the region of cathode catalysis layer is entered, with the proton transmitted through proton exchange membrane and through outer lead
Under catalyst action of the electronics passed in cathode catalysis layer, occur reduction reaction, the water of generation with vapor or
It is inverse in the moving direction of oxygen after the form of liquid water passes through cathode porous gas diffusion layers, into the drawing in cathode collector plate
Net is stretched, cathode is discharged under the action of gravity and oxygen flow.The function and battery of fuel cell pack peripheral circuit control system
Polarization curve match, as shown in Figure 10, battery pile output after, by DC-DC converter unit with it is defeated after Direct Current Distribution Unit
Out to electrical equipment or energy storage device, wherein further include routing inspection unit and circuit protection unit in control circuit.
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 direct methanol fuel cell heap, which is characterized in that the monocells at different levels in battery pile include membrane electrode assembly
(6), positioned at membrane electrode assembly two sides anode collector plate and cathode collector plate, be located at anode collector plate and cathode collector plate
The bipolar support plate of the anode in outside (5) and cathode branch fagging (4), the right side anode-supported plate (3) positioned at battery pile both ends and a left side
Side anode-supported plate (7)；
Battery pile further includes bolt group (2) for fixing, the Elecrical connector (8) above battery pile, priming device (1) and outer
Enclose circuit control system；The priming device (1) is located at the top of Elecrical connector (8)；
The anode collector plate and cathode collector plate is that flow-field plate is integrated with collector, anode collector plate and cathode current collection
Plate is composed of metallic conduction lead frame and conductive fish scale-shaped stretching nets.
2. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that the stretching nets have three
Structure is tieed up, is embedded in metallic conduction lead frame for an individual part.
3. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that the metallic conduction lead frame
Material with stretching nets is Stainless steel 316.
4. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that the stretching nets both rose
To the effect of flow-field plate, fuel is evenly distributed, while playing conductive effect, conducts electronics.
5. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that in anode collector plate, draw
It is horizontal positioned to stretch net, 5 cylindrical bodies pair are taken at the coarse membrane electrode for being affixed on anode-side on one side, the bipolar support plate of anode (5) middle part
Stretching nets support；And in cathode collector plate, stretching nets are placed vertically, 90 degree are differed with the stretching nets in anode collector plate, slightly
The rough membrane electrode for being affixed on cathode side on one side, cathode branch fagging middle part support stretching nets using parallel ribs structure.
6. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that the Elecrical connector
(8) it is composed of printed circuit board (12), elastic sheet metal (11) and Single-end output connector (13)；The metallic conduction draws
Frame is communicated by elastic sheet metal (11) with Elecrical connector (8) out, and monocells at different levels can then be carried out by Elecrical connector (8)
Series connection, and be welded with Single-end output connector (13) at printed circuit board (12) both ends, circuit output is realized, so as to connecing for load
Enter.
7. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that the bipolar support of the anode
Plate (5) and cathode branch fagging (4) are epoxide resin material.
8. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that in the bipolar support plate of anode
(5) middle part, support construction are 5 cylindrical bodies, play a part of to support stretching nets；At the middle part of cathode branch fagging (4), support
Structure is parallel ribs, plays a part of to support stretching nets.
9. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that the bipolar support of the anode
Plate (5) is bipolar plates, has the support construction and fuel cavity of two-stage battery, and is provided with gas vent, and gas-liquid separation membrane is posted in inside,
Prevent fuel losses and discharge exhaust gas.
10. a kind of direct methanol fuel cell heap according to claim 1, which is characterized in that the peripheral circuit control
The function of system processed and the polarization curve of battery match, after battery pile output, by the DC-DC converter unit in control circuit
With output after Direct Current Distribution Unit to electrical equipment or energy storage device, wherein further include routing inspection unit and circuit in control circuit
Protection location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821683108.5U CN209001031U (en) | 2018-10-17 | 2018-10-17 | A kind of direct methanol fuel cell heap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821683108.5U CN209001031U (en) | 2018-10-17 | 2018-10-17 | A kind of direct methanol fuel cell heap |
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| CN209001031U true CN209001031U (en) | 2019-06-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301301A (en) * | 2018-10-17 | 2019-02-01 | 华南理工大学 | A kind of direct methanol fuel cell heap |
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2018
- 2018-10-17 CN CN201821683108.5U patent/CN209001031U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301301A (en) * | 2018-10-17 | 2019-02-01 | 华南理工大学 | A kind of direct methanol fuel cell heap |
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