CN2886818Y - Compound flow channel board for fuel battery pile and electrolysis reacting pile - Google Patents
Compound flow channel board for fuel battery pile and electrolysis reacting pile Download PDFInfo
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- CN2886818Y CN2886818Y CNU200520029002XU CN200520029002U CN2886818Y CN 2886818 Y CN2886818 Y CN 2886818Y CN U200520029002X U CNU200520029002X U CN U200520029002XU CN 200520029002 U CN200520029002 U CN 200520029002U CN 2886818 Y CN2886818 Y CN 2886818Y
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- combined
- guidance tape
- flow guidance
- flow passage
- battery
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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 belongs to electrochemistry field, relating to proton exchange membrane fuel battery and a flow passage plate in the electrolytic reactor. The flow passage plate is different from general double-layer plate, with three layers. The middle layer is an insulated connection strap, the up and bottom layers are conductive metal plates. The middle fluid channel of composite flow passage plate is all through. Two conductive metal plates can be connected directly or not according to the utilized occasion, and be the negative poles or positive poles of the neighboring battery, but share the same flow passage. Therefore, the flow passage plate can be made very thin, and the thickness of single battery can be below 1mm, as 1/2 thick of the current single battery, and the bulk of fuel battery or electrolytic reactor can be reduced, to provide the utilization of fuel battery and electrolytic reactor with more advanced technical support.
Description
Technical field
The utility model belongs to electrochemical field, and it relates to runner plate in pem fuel cell stack and the cell reaction heap.
Background technology
Pem fuel cell stack is a kind of energy conversion device, and it directly changes into electric energy with chemical energy, externally power supply.
In battery pile, mainly contain two partly, the one, membrane electrode, be called for short MEA, this membrane electrode is to adhere to one deck catalyst respectively on the both sides of a proton exchange membrane, and wherein one deck catalyst is an anode catalyst, can be with fuel such as methyl alcohol and oxidation of hydrogen, the electronics that produces is transferred to another layer catalyst by external circuit, be cathod catalyst, pass to oxygen, with oxygen reduction by catalyst.The proton that anodic oxidation produces is delivered to negative electrode by proton exchange membrane, combines formation water with the hydroxyl ion that negative electrode produces.Another mainly partly is a bipolar plates in the battery pile, its function is to provide passage for fuel or oxidant and product on the one hand, the continuous operation that is beneficial to react, be to provide passage on the other hand for the electronics that produces in the reaction, also having on the one hand is spatially to separate fuel and oxidant, avoids them to mix.Such fuel cell pack has only a kind of compound mode, and promptly each monocell is cascaded, and the voltage of battery pile is the voltage sum of each monocell.The parts that also comprise other in battery pile are as accessories such as end plate, sealing gasket, connecting rods.
The basic structure of general battery pile as people such as Zhang Haifeng article " the multikilowatt Proton Exchange Membrane Fuel Cells (and power technology: Vol.27 No.4; p348; August .2003) " in shown the same, in battery pile, consist predominantly of following assembly: two end plates, two collector plate, a plurality of bipolar plates, a plurality of membrane electrodes, connecting rod and external circuit and auxiliary equipment.They are arranged in the following order: end plate-collector plate-proton exchange membrane electrode-bipolar plates-proton exchange membrane electrode-...-collector plate-end plate, fix by connecting rod, form battery pile, ellipsis is represented repetitive, and each repetitive comprises a proton exchange membrane electrode and a bipolar plates.Bipolar plates is as the transmission channel of electronics and reactant and as the supporter of battery, and generally between 2.5～5mm, material is graphite cake or metallic plate to its thickness.The bipolar plates upper and lower surface all processes runner separately, and last lower flow channel is not connected.Fig. 2 (1) is a kind of single face front view of bipolar plates, and there is a single-pass runner on its surface, and Fig. 2 (2) is this bipolar plates middle part single face end view, and the runner on both sides is not connected as can be seen.Bipolar plates links to each other with anode with the negative electrode of adjacent single cells respectively in battery, the result forms a series connection circuit, because bipolar plates need be separated oxygen and fuel, also to provide enough transport channels simultaneously for them, so bipolar plates can not be done too thinly, otherwise will produce very big transport resistance, and make battery normally not move.The thickness of bipolar plates has just directly influenced the size of fuel cell pack.How to reduce bipolar plates thickness under the prerequisite of guaranteed efficiency is a problem that makes countless experts gaze at.It has become one of bottleneck that can current fuel cell practical
The operation principle of cell reaction just in time is the inverse process of fuel cell, so the cell reaction heap can utilize same battery structure, the catalyst system difference of just selecting for use.
Summary of the invention
The purpose of this utility model provides a kind of combined-flow guidance tape that is used for fuel cell pack and cell reaction heap.
In order on the basis of guaranteed efficiency, to reduce the volume of reactor, promptly mainly be the thickness that reduces bipolar plates.The utility model has adopted a kind of combined-flow guidance tape in order to reach this purpose.As shown in Figure 3, this combined-flow guidance tape middle level is insulation brace 30, and two-layer up and down is conductive metal sheet 20.Its outward appearance such as Fig. 4-1,4-2,4-3, Fig. 5-1,5-2,5-3 shown in Fig. 6-1,6-2, the 6-3, are respectively front view, end view and the reverse view of the combined-flow guidance tape of three kinds of different structures.
As can be seen from the figure, the obvious characteristic of combined-flow guidance tape is: the middle level is an insulating trip 30, and two conductive sheet layers 20 separate up and down.Among the intermediate flow channel of combined-flow guidance tape such as Fig. 4-1 8 partly is up/down perforation in the centre.40 enlarged drawing 4-1-1 as can be seen from Fig. 4-1: just also have skim 10 to be used for fixing intermediate flow channel 8 on the both sides of runner, the thickness of this skim is less than the thickness of combined-flow guidance tape.Two-layer conducting strip contacts with the catalyst layer of two monocell proton exchange membrane electrodes respectively, when two conducting strips join with the opposite polarity electrode conducting strip that is close to monocell respectively, as Figure 1-1, fuel cell pack and the cell reaction heap that can form the continuous series circuit of a both positive and negative polarity; When all anode conducting sheets connect together, when all negative electrode conducting strips connect together, shown in Fig. 1-2, can form a big monocell, voltage has only a monocell big, but electric current is the summation of each monocell; When the mode that adopts other connects, can also obtain the fuel cell pack and the cell reaction heap of different voltage and electric current output.When fuel or oxidizing gas pass through, will provide reactant for two electrodes simultaneously in the intermediate flow channel 8 of combined-flow guidance tape.Because under same pressure, the flow of gas or liquid approximate with cube being directly proportional of channel size, so the thickness that needs only the combined-flow guidance tape than same occasion bipolar plates single channel thickness greatly less than 30%, can obtain the effect same with bipolar plates.So just reduced the nearly thickness of a runner and the thickness of bipolar plates intermediate barrier layer, thereby the thickness of combined-flow guidance tape can be at about 1/2nd of existing bipolar plates thickness, the volume and weight of overall fuel cell nearly will reduce half.
30 layers of combined-flow guidance tape intermediate insulation sheets can be under acid condition and battery operated temperature not burn into do not dissolve, nonconducting plastics, resin.For example unsaturated polyester resin, nylon resin, Merlon, polytetrafluoroethylene and other TPO also have polyimides and other insulating varnish.Two-layer up and down conductive sheet layer 20 can be under acid condition and battery operated temperature not burn into do not dissolve, keep the metal of satisfactory electrical conductivity, such metal has stainless steel, titanium sheet, can perhaps carry out nitrogen treatment at their surface plating noble metal gold, silver, platinum at titanium plate surface.
The structure of the fuel cell pack of Gou Chenging is as follows like this: end plate 1-unipolar plate 2-proton exchange membrane electrode 3-combined-flow guidance tape-proton exchange membrane electrode 3-...-unipolar plate 2-end plate 1, fixing by connecting rod 5, form battery pile, wherein " proton exchange membrane electrode 3-combined-flow guidance tape " forms repetitive, and some repetitives are combined into fuel cell pack or cell reaction heap.
Reactant imports battery pile by end plate 1, by unipolar plate 2, enter each monocell by the material channel 6 of combined-flow guidance tape, by one of them passage 6 input, by combined-flow guidance tape intermediate flow channel 8, flow out by another material channel 6, flow out battery pile via unipolar plate 2, end plate 1 again.
The thickness of the described combined-flow guidance tape of the utility model according to the size of response area, can be adjusted between 0.2～6 millimeter, and relatively the combined-flow road plate thickness of Shi Heing is 1～3 millimeter.The thickness of combined-flow guidance tape intermediate insulation sheet 30 is: 0.1 millimeter to below 99% of combined-flow guidance tape gross thickness, and its main effect is to separate two conducting strips 20 and participate in constructing runner 8.The width of the intermediate flow channel 8 of combined-flow guidance tape is close with the width of flow path of width between the runner and general bipolar plates, between 0.2～2mm, be generally 1～1.5 millimeter, intermediate flow channel 8 can be processed into the single-pass straight channel, shown in Fig. 4-1, also can be processed into the ordinary straight runner, shown in Fig. 5-1, perhaps bilateral runner is shown in Fig. 6-1.Being processed into other curve runner also is fine.The apparent size of other parts of battery pile is big or small consistent with the combined-flow guidance tape.
Description of drawings
Fig. 1-1 and Fig. 1-2 are the schematic diagrames of pem fuel cell stack installation diagram;
Fig. 2 (1) is a kind of single face front view of bipolar plates;
Fig. 2 (2) is this bipolar plates middle part single face end view;
Fig. 3 is the side schematic view of combined-flow guidance tape;
Fig. 4-1, Fig. 5-1, Fig. 6-1 are the surperficial front view of three kinds of different composite runner plates;
Fig. 4-2, Fig. 5-2, Fig. 6-2 are respectively the side view of three kinds of different composite runner plates;
Fig. 4-3, Fig. 5-3, Fig. 6-3 are respectively the rear view of three kinds of different composite runner plates;
Fig. 4-1-1 is 40 partial enlarged drawings of Fig. 4-1;
The technical solution of the utility model is described below in conjunction with the accompanying drawings:
Accompanying drawing 1-1 and Fig. 1-2 are the schematic diagrames of pem fuel cell stack installation diagram, form battery pile by a plurality of monocell repetitives.Wherein 101,102,103,104 be the combined-flow guidance tape.Adopt this combined-flow guidance tape, can carry out different combinations, this is that the common double pole plate can't be realized.As linking to each other with 102 left end is anodal when 101 left end negative pole, the right-hand member negative pole when 101 links to each other with 102 right-hand member is anodal, and other is similarly continuous, as Figure 1-1, is a battery pile that is composed in series by each monocell.102,104 etc. link to each other in anodal unipolar plate among the figure and figure, and negative pole unipolar plate and 101,103 etc. links to each other, and when two electrodes of combined-flow guidance tape 100 also link to each other simultaneously, shown in Fig. 1-2, promptly consists of a battery pile that is connected in parallel by each monocell.
Accompanying drawing 3 is side schematic views of combined-flow guidance tape, and it is formed by three layers as can be seen.The centre is an insulating barrier 30, about be conductive sheet layer 20.This figure also is a Figure of description.
Fig. 4-1, Fig. 5-1, Fig. 6-1 are the front view of three kinds of different composite runner plates, process the intermediate flow channel 8 of up/down perforation above, pass in and out material hole 6, are used to pass in and out the hole 7 of coolant, and terminals 9.Fig. 4-2, Fig. 5-2, Fig. 6-2 are respectively compound runner side view.Fig. 4-3, Fig. 5-3, Fig. 6-3 are respectively the rear view of combined-flow guidance tape, and this face contacts with the intermediate layer.The intermediate layer is made by insulating material, and its shape is consistent with the back side shape of surface conductance lamella 20.Two-layerly up and down make by the corrosion resistant sheet metal.
Embodiment
Embodiment 1:
A kind of combined-flow guidance tape that is used for pem fuel cell stack and cell reaction heap, the intermediate layer 30 of this combined-flow guidance tape is the insulation lamella, what this example adopted is polytetrafluoroethylene; Two-layer up and down is conductive metal sheet 20, and what this example adopted is stainless steel substrates; The conducting metal stainless steel substrates contacts with the catalyst layer of proton exchange membrane electrode; The centre of the combined-flow guidance tape of this example is processed with the runner 8 of up/down perforation, when reactant flow is crossed runner, will be simultaneously for two catalyst layers up and down provide reactant, and take away product.
Intermediate insulation lamella 30 can also be under acid condition and battery operated temperature not burn into do not dissolve, nonconducting plastics, resin: for example unsaturated polyester resin, nylon resin, Merlon, polytetrafluoroethylene and other TPO also have polyimides and other insulating varnish; Two-layer up and down conductive sheet layer 20 can be under acid condition and battery operated temperature not burn into do not dissolve, keep the sheet metal of satisfactory electrical conductivity, such sheet metal has stainless steel substrates, titanium sheet, can plate noble metal such as gold, silver, platinum on their surfaces, perhaps carry out nitrogen treatment at titanium plate surface.
Shown in Fig. 5-1, the centre of the combined-flow guidance tape of this example is processed with the runner 8 of up/down perforation, passes in and out material hole 6, is used to pass in and out the hole 7 of coolant, and terminals 9.Fig. 5-1 is the size of the combined-flow guidance tape of embodiment employing.
Claims (3)
1, a kind of combined-flow guidance tape that is used for pem fuel cell stack and cell reaction heap is characterized in that the intermediate layer of this combined-flow guidance tape is the insulation lamella, and two-layer up and down is conductive metal sheet; The centre of combined-flow guidance tape is processed with the runner (8) of up/down perforation, for two catalyst layers up and down in pem fuel cell stack and the cell reaction heap provide reactant, and takes away product; Pass in and out material hole (6) in addition, be used to pass in and out the hole (7) of coolant.
2, combined-flow guidance tape as claimed in claim 1 is characterized in that: it also has terminals (9).
3, combined-flow guidance tape as claimed in claim 1 or 2, it is characterized in that: the intermediate insulation lamella be under acid condition and battery operated temperature not burn into do not dissolve, nonconducting plastics or resin, comprise unsaturated polyester resin, nylon resin, Merlon, polytetrafluoroethylene and other TPO, also have polyimides and other insulating varnish; The power-on and power-off lamella be under acid condition and battery operated temperature not burn into do not dissolve, keep the stainless steel or the titanium sheet of satisfactory electrical conductivity, or at the stainless steel or the titanium sheet of surface plating noble metal gold, silver, platinum, or carry out the titanium sheet of nitrogen treatment on the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520029002XU CN2886818Y (en) | 2005-07-29 | 2005-07-29 | Compound flow channel board for fuel battery pile and electrolysis reacting pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520029002XU CN2886818Y (en) | 2005-07-29 | 2005-07-29 | Compound flow channel board for fuel battery pile and electrolysis reacting pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2886818Y true CN2886818Y (en) | 2007-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200520029002XU Expired - Fee Related CN2886818Y (en) | 2005-07-29 | 2005-07-29 | Compound flow channel board for fuel battery pile and electrolysis reacting pile |
Country Status (1)
| Country | Link |
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| CN (1) | CN2886818Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944618A (en) * | 2010-10-08 | 2011-01-12 | 武汉理工大学 | Tree-structured flow field proton exchange membrane fuel cell bipolar plate |
| CN107570974A (en) * | 2017-10-16 | 2018-01-12 | 中国核动力研究设计院 | A kind of rectangular flow guidance tape impulse welding procedure |
-
2005
- 2005-07-29 CN CNU200520029002XU patent/CN2886818Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944618A (en) * | 2010-10-08 | 2011-01-12 | 武汉理工大学 | Tree-structured flow field proton exchange membrane fuel cell bipolar plate |
| CN107570974A (en) * | 2017-10-16 | 2018-01-12 | 中国核动力研究设计院 | A kind of rectangular flow guidance tape impulse welding procedure |
| CN107570974B (en) * | 2017-10-16 | 2019-03-19 | 中国核动力研究设计院 | A kind of rectangular flow guidance tape impulse welding procedure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070404 Termination date: 20090831 |