CN100346501C - Sealing structure of fuel battery - Google Patents
Sealing structure of fuel battery Download PDFInfo
- Publication number
- CN100346501C CN100346501C CNB021576564A CN02157656A CN100346501C CN 100346501 C CN100346501 C CN 100346501C CN B021576564 A CNB021576564 A CN B021576564A CN 02157656 A CN02157656 A CN 02157656A CN 100346501 C CN100346501 C CN 100346501C
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- Prior art keywords
- membrane electrode
- porousness
- sealing
- active region
- proton exchange
- Prior art date
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- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 239000000446 fuel Substances 0.000 title claims abstract description 45
- 239000012528 membrane Substances 0.000 claims abstract description 121
- 239000000463 material Substances 0.000 claims abstract description 38
- 239000004033 plastic Substances 0.000 claims abstract description 20
- 229920003023 plastic Polymers 0.000 claims abstract description 20
- 239000003054 catalyst Substances 0.000 claims abstract description 16
- 229920001971 elastomer Polymers 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000005060 rubber Substances 0.000 claims abstract description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000007731 hot pressing Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 8
- 230000003204 osmotic effect Effects 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims description 2
- 239000004831 Hot glue Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 22
- 229910052799 carbon Inorganic materials 0.000 description 22
- 239000007800 oxidant agent Substances 0.000 description 16
- 230000001590 oxidative effect Effects 0.000 description 16
- 239000001257 hydrogen Substances 0.000 description 15
- 229910052739 hydrogen Inorganic materials 0.000 description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000003487 electrochemical reaction Methods 0.000 description 6
- 239000008393 encapsulating agent Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 5
- 230000002950 deficient Effects 0.000 description 5
- 239000002737 fuel gas Substances 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 150000001450 anions Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 239000012809 cooling fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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 present invention relates to a sealing structure of a fuel cell, which comprises a membrane electrode, a guide plate and a sealing ring, wherein the membrane electrode is arranged in the middle of the sealing structure, the guide plate is pressed on both sides of the membrane electrode, and the sealing ring is arranged on the pressing surface of the guide plate and the membrane electrode; the membrane electrode comprises an active area and a sealing area, wherein the sealing area is arranged on the circumference of the active area, the active area comprises a proton exchange membrane, a porous supporting material and catalysts, and the catalysts are attached on the porous supporting material and are pressed on both sides of the proton exchange membrane. The sealing area is formed by the way that the proton exchange membrane of the active area or the porous supporting material extends outwards, and is filled with permeated hot-melt adhesive plastic or thermosetting rubber and resin. The thickness of the sealing area is the same as the thickness of the active area. Compared with the prior art, the sealing structure has the advantages of high sealing reliability, good manufacturability, mass production, etc.
Description
Technical field
The present invention relates to the critical component of fuel cell, relate in particular to a kind of hermetically-sealed construction of fuel cell.
Background technology
Electrochemical fuel cell is a kind of device that hydrogen fuel and oxidant can be changed into electric energy and product.The internal core parts of this device are membrane electrode (Membrane Electrode Assembly are called for short MEA), and membrane electrode (MEA) is made up of as carbon paper a proton exchange membrane, two porous conductive materials of film two sides folder.The catalyst that contains the initiation electrochemical reaction of even tiny dispersion on two boundary faces of film and carbon paper is as the metal platinum catalyst.The electronics that the membrane electrode both sides can will take place to generate in the electrochemical reaction process with conductive body is drawn by external circuit, constitutes current circuit.
At the anode tap of membrane electrode, fuel can pass porousness diffusion material (carbon paper) by infiltration, and electrochemical reaction takes place on catalyst surface, lose electronics, form cation, cation can pass proton exchange membrane by migration, arrives the other end cathode terminal of membrane electrode.At the cathode terminal of membrane electrode, contain the gas of oxidant (as oxygen), as air, pass porousness diffusion material (carbon paper), and the generation electrochemical reaction obtains electronics on catalyst surface, forms anion by infiltration.The cation of coming in the anion and the anode tap migration of cathode terminal formation reacts, and forms product.
Adopting hydrogen is fuel, and the air that contains oxygen is in the Proton Exchange Membrane Fuel Cells of oxidant (or pure oxygen is an oxidant), and fuel hydrogen has just produced hydrogen cation (or being proton) in the catalytic electrochemical reaction of anode region.Proton exchange membrane helps the hydrogen cation to move to the cathodic region from the anode region.In addition, proton exchange membrane is separated the air-flow and the oxygen containing air-flow of hydrogen fuel, they can not mixed mutually and produces explosion type reaction.
In the cathodic region, oxygen obtains electronics on catalyst surface, forms anion, and moves the hydrogen cation reaction of coming, reaction of formation product water with the anode region.In the Proton Exchange Membrane Fuel Cells that adopts hydrogen, air (oxygen), anode reaction and cathode reaction can be expressed in order to following equation:
Anode reaction: H
2→ 2H
++ 2e
Cathode reaction: 1/2O
2+ 2H
++ 2e → H2O
In typical Proton Exchange Membrane Fuel Cells, membrane electrode (MEA) generally all is placed in the middle of the pole plate of two conductions, and quarter is milled by die casting, punching press or machinery in the surface that every block of flow guiding electrode plate contacts with membrane electrode, and formation is the guiding gutter of one or more at least.These flow guiding electrode plates can be the pole plates of metal material, also can be the pole plates of graphite material.Water conservancy diversion duct on these flow guiding electrode plates and guiding gutter import fuel and oxidant the anode region and the cathodic region on membrane electrode both sides respectively.In the structure of a Proton Exchange Membrane Fuel Cells monocell, only there is a membrane electrode, the membrane electrode both sides are respectively the guide plate of anode fuel and the guide plate of cathode oxidant.These guide plates are both as the current collector motherboard, also as the mechanical support on membrane electrode both sides, guiding gutter on the guide plate acts as a fuel again and enters the passage of anode, cathode surface with oxidant, and as the passage of taking away the water that generates in the fuel cell operation process.
In order to increase the gross power of whole Proton Exchange Membrane Fuel Cells, two or more monocells can be connected into battery pack or be unified into battery pack by the mode that tiles usually by straight folded mode.In straight folded, in-line battery pack, can there be guiding gutter on the two sides of a pole plate, and wherein one side can be used as the anode guide face of a membrane electrode, and another side can be used as the cathode diversion face of another adjacent membranes electrode, and this pole plate is called bipolar plates.A series of monocell connects together by certain way and forms a battery pack.Battery pack tightens together by front end-plate, end plate and pull bar usually and becomes one.
A typical battery stack generally includes: the water conservancy diversion import and the flow-guiding channel of (1) fuel and oxidant gas are distributed to fuel (as hydrogen, methyl alcohol or the hydrogen-rich gas that obtained by methyl alcohol, natural gas, gasoline) and oxidant (mainly being oxygen or air) in the guiding gutter of each anode, cathode plane equably after reforming; (2) import and export and the flow-guiding channel of cooling fluid (as water) are evenly distributed to cooling fluid in each battery pack inner cooling channel, the heat absorption that hydrogen in the fuel cell, the exothermic reaction of oxygen electrochemistry are generated and take battery pack out of after dispel the heat; (3) outlet of fuel and oxidant gas and corresponding flow-guiding channel, fuel gas and oxidant gas are when discharging, and portability goes out the liquid that generates in the fuel cell, the water of steam state.Usually, the import and export of all fuel, oxidant, cooling fluid are all opened on the end plate of fuel battery or on two end plates.
Proton Exchange Membrane Fuel Cells can be used as the dynamical system of delivery vehicles such as all cars, ship, can be used as portable, portable, fixed Blast Furnace Top Gas Recovery Turbine Unit (TRT) again.Can be distributed on the surface, whole membrane electrode both sides and don't produce in order to ensure fuel in the Proton Exchange Membrane Fuel Cells and oxidant gas and mix, Sealing Technology is unusual key just.If seal badly, may produce two kinds of situations: a kind of situation is that fuel gas mixes at fuel battery inside with oxidant gas, and in the fuel cell that adopts hydrogen and oxygen to move, this mixing is very fatal, in case explosion caused, destructive power is very big; Another kind of situation be fuel gas or oxidant gas to the outside seepage of fuel cell, this situation not only can reduce the efficient of fuel cell, and in case when fuel hydrogen outside boundary's concentration accumulate when acquiring a certain degree, will blast.Therefore, attach great importance to the fuel cell seal technology.Present fuel cell seal technology mainly contains following 3 kinds of methods:
The 1st kind of method: the preparation of membrane electrode adopts the area of proton exchange membrane more than the porousness backing material in the membrane electrode, area as carbon paper is much bigger, the film that exceeds the carbon paper area is not the active region of electrochemical reaction, and the film two sides of electrochemical active regions has two carbon papers (centre is pressed with catalyst layer) to press together respectively.After the membrane electrode of this way is placed on two guide plate centres, the base material of wherein directly being used as encapsulant greater than the film of electro-chemical activity, and play adjacent two guide plates directly contact and the effect of short circuit of preventing, as Fig. 1, it is the structural representation of existing membrane electrode, comprise air inlet 1 among the figure, cooling water inlet 2, hydrogen inlet 3, proton exchange membrane 4, scribble the activated partial 5 of catalyst, Fig. 2 is the structural representation of baffler and sealing ring, comprises air inlet 1 among the figure, cooling water inlet 2, hydrogen inlet 3, baffler 6, guiding gutter 7, sealing ring 8.
The 2nd kind of method: the sealing device that European patent EP 00604683A1 adopted as shown in Figure 3, this device comprises air inlet 1, sealing ring 8, membrane electrode 10, Fig. 4 is the profile of Fig. 3, comprise air inlet 1, proton exchange membrane 4, sealing ring 8, carbon paper 9 among the figure, be characterized in the both sides porousness backing material on the membrane electrode, as two carbon papers 9, extend the active region of membrane electrode greatly, encapsulant 8 is placed on the proton exchange membrane 4 of membrane electrode, clamping like this on two bafflers of membrane electrode does not need to place encapsulant again.
The 3rd kind of method: the sealing device that Shanghai supernatural power house journal (patent No. 01238847.5) is adopted, as shown in Figure 5, be characterized in membrane electrode is divided into two parts, 10 parts are membrane electrode among Fig. 5, be the reactive activity part, 11 parts are the frame (only part beyond the dotted line) of membrane electrode among Fig. 5.10 parts and 11 parts are two kinds of distinct materials, and the boundary of 10,11 2 parts is very clear and definite, and 11 parts are generally formed, and fused by adhering method and 10 parts by plastics or elastic caoutchouc, resin.Sealing between electrode integral body and the baffler also can be adopted sealing ring to be placed on above the frame or be placed on the baffler.
Though can reach the purpose of sealed fuel battery, there is following defective in above-mentioned Sealing Technology:
One, the defective corresponding to the 1st kind of method is because proton exchange membrane generally is somewhat expensive material, after exposing in a large number, is not fully used, and waste is serious; Proton exchange membrane is a kind of material that easily wears out, easily breaks, and directly contacts with encapsulant under pressure for a long time, and easier breaking causes the sealing failure; Proton exchange membrane is a kind of Corrosive Materia with strong acid, and it contacts for a long time with encapsulant on the baffler, easily makes the encapsulant sex change, causes the sealing failure.
Two, the defective corresponding to the 2nd kind of method is because sealing ring material is placed on the diffusion layer material (carbon paper) of membrane electrode, and it is very big that special diffusion layer material (on the carbon paper) in membrane electrode two sides is provided with the sealing ring material difficulty.Because diffusion layer material (carbon paper) is very thin thickness often, mainly be in order to strengthen the rapid diffusion of fuel gas and oxidant air, so on thin like this material, place sealing ring, the thickness of sealing ring is inevitable very thin, and thin sealing ring very easily is out of shape, in addition, electrode two sides all are provided with sealing ring, proton exchange membrane below the sealing ring is born huge focus pressure, is crushed out of shape easily, and long-term pressurized promptly easily breaks and causes the sealing failure.
Three, the defective corresponding to the 3rd kind of method is because membrane electrode is divided into 10,11 2 parts, because the material of 10,11 2 parts is different, bonding mutually specification requirement is very high, and 10,11 2 part after bonding the handing-over tape thickness and original 10,11 2 segment thicknesses much at one, increased bonding difficulty so again, and this highly difficult adhesive technology is unfavorable for producing on a large scale membrane electrode.
Summary of the invention
Purpose of the present invention is exactly the hermetically-sealed construction of the fuel cell that a kind of sealing reliability height, good manufacturability is provided in order to overcome the defective that above-mentioned prior art exists, helps producing in batches.
Purpose of the present invention can be achieved through the following technical solutions: a kind of hermetically-sealed construction of fuel cell, comprise membrane electrode, baffler, sealing ring, in the middle of described membrane electrode is located at, described baffler is pressed together on the two sides of this membrane electrode, described sealing ring is located at the surface of baffler and membrane electrode pressing, it is characterized in that, described membrane electrode comprises active region and seal area, wherein, seal area be located at the active region around, described active region comprises proton exchange membrane, the porousness backing material, catalyst, this catalyst is attached on the porousness backing material and be pressed together on the proton exchange membrane two sides, described seal area is stretched out by the porousness backing material of active region and fills osmotic heat melten gel plastics or thermoset rubber, resin is formed, and the thickness in sealing district is identical with the thickness of active region; Described porousness backing material extends out to the outer rim edge of seal area, described PUR plastics or thermoset rubber, resin are three layers, wherein the intermediate layer is located in the middle of the porousness backing material of extension, two-layer in addition porousness backing material two outsides that are located at extension, and the mode by hot pressing should two-layer PUR plastics or thermoset rubber, resin penetration go into porousness backing material inside, three-layer sealed material combines together.
The present invention utilizes a kind of hot melt macromolecule engineering plastics or thermoset rubber, resin; as the polyesters engineering plastics; under the hot pressing condition that the characteristics of this engineering high molecule plastic or rubber, resin are to membrane electrode is made similar (under uniform temperature and the pressure); the proton exchange membrane covering also can be bonded together to protectiveness during fusing, the outward extending outer rim of membrane electrode can be the cited multiple situations of following examples like this.Compared with prior art, sealing reliability height of the present invention, good manufacturability, helping in batches, property ground produces.
Description of drawings
Fig. 1 is the structural representation of existing membrane electrode;
Fig. 2 is the structural representation of existing baffler and sealing ring;
Fig. 3 is the structural representation of the membrane electrode of existing European patent;
Fig. 4 is the A-A cutaway view of Fig. 3;
Fig. 5 is the structural representation of another kind of existing membrane electrode;
Fig. 6 is a structural representation of the present invention;
Fig. 7 is the film electrode structure schematic diagram of the embodiment of the invention 1;
Fig. 8 is the film electrode structure schematic diagram of the embodiment of the invention 2;
Fig. 9 is the hot-forming structural representation before of the membrane electrode of the embodiment of the invention 3;
Figure 10 is the hot-forming structural representation afterwards of the membrane electrode of the embodiment of the invention 3;
Figure 11 is the membrane electrode overall structure schematic diagram of the embodiment of the invention 3;
Figure 12 is the B-B cutaway view of Figure 11.
Embodiment
Below in conjunction with the accompanying drawings and the specific embodiments, the invention will be further described.
Embodiment 1
As Fig. 6, shown in Figure 7, a kind of hermetically-sealed construction of fuel cell, comprise membrane electrode 14, baffler 6, sealing ring 8, in the middle of described membrane electrode 14 is located at, described baffler 6 is provided with guiding gutter 7, this baffler 6 is pressed together on the two sides of membrane electrode 14, described sealing ring 8 is located at the surface of baffler 6 and membrane electrode 14 pressings, described membrane electrode 14 comprises active region 5 and seal area 13, wherein, seal area 13 be located at active region 5 around, described active region 5 comprises proton exchange membrane 4, the carbon paper 9 of attached catalyst, described seal area about in the of 13 two ends be provided with air inlet 1, cooling water inlet (figure does not show), hydrogen inlet (figure does not show), described seal area 13 is stretched out by the proton exchange membrane 4 of active region 5 or carbon paper 9 and fills osmotic heat melten gel plastics 12 and form, and the thickness in sealing district 13 is identical with the thickness of active region 5.
Present embodiment is that a kind of proton exchange membrane 4 is only outwards extended a bit slightly than membrane electrode active region 5, the outward extending outer rim of membrane electrode is made of three layers of PUR plastic layer 12, once hot-forming during with membrane electrode hot pressing, any upper and lower termination laying 121 of proton exchange membrane so slightly stretches out, these laying 121 two sides are attached with two layers of PUR plastic layer 122, and thickness and membrane electrode thickness after this three-layer plastic layer hot pressing are just the same.
As Fig. 6, shown in Figure 8, a kind of hermetically-sealed construction of fuel cell, comprise membrane electrode 14, baffler 6, sealing ring 8, in the middle of described membrane electrode 14 is located at, described baffler 6 is provided with guiding gutter 7, this baffler 6 is pressed together on the two sides of membrane electrode 14, described sealing ring 8 is located at the surface of baffler 6 and membrane electrode 14 pressings, described membrane electrode 14 comprises active region 5 and seal area 13, wherein, seal area 13 be located at active region 5 around, described active region 5 comprises proton exchange membrane 4, the carbon paper 9 of attached catalyst, described seal area about in the of 13 two ends be provided with air inlet 1, cooling water inlet (figure does not show), hydrogen inlet (figure does not show), described seal area 13 is stretched out by the proton exchange membrane 4 of active region 5 or carbon paper 9 and fills osmotic heat melten gel plastics 12 and form, and the thickness in sealing district 13 is identical with the thickness of active region 5.
Present embodiment is that a kind of proton exchange membrane 4 continues to extend outwardly into the outer rim edge by the membrane electrode active region fully, two layers of PUR plastic layer 12 are covered on the proton film by hot pressing when hot pressing membrane electrode together about it, and its thickness is also just the same with membrane electrode thickness.
As Fig. 6, Fig. 9, Figure 10, Figure 11, shown in Figure 12, a kind of hermetically-sealed construction of fuel cell, comprise membrane electrode 14, baffler 6, sealing ring 8, in the middle of described membrane electrode 14 is located at, described baffler 6 is provided with guiding gutter 7, this baffler 6 is pressed together on the two sides of membrane electrode 14, described sealing ring 8 is located at the surface of baffler 6 and membrane electrode 14 pressings, described membrane electrode 14 comprises active region 5 and seal area 13, wherein, seal area 13 be located at active region 5 around, described active region 5 comprises proton exchange membrane 4, the carbon paper 9 of attached catalyst, described seal area about in the of 13 two ends be provided with air inlet 1, cooling water inlet (figure does not show), hydrogen inlet (figure does not show), described seal area 13 is stretched out by the proton exchange membrane 4 of active region 5 or carbon paper 9 and fills osmotic heat melten gel plastics 12 and form, and the thickness in sealing district 13 is identical with the thickness of active region 5.
Present embodiment is a kind of very diverse ways, it is to continue the small part that stretches out by two side diffusion layer materials (carbon paper 9) beyond the membrane electrode active region 5, liner multilayer PUR plastic layer 12 in the middle of it, wherein two layers of outermosts cover the proton film, as Fig. 9, during hot pressing, be forced to get into porousness diffusion layer material (carbon paper 9) after 12 fusings of multilayer PUR plastics under the membrane electrode hot pressing condition, wherein two layers of proton exchange membrane that fraction is extended of outermost cover.Like this, hot pressing membrane electrode is finished with the hot pressing of extension frame, and the thickness of multilayer PUR plastics is got into porousness diffusion layer material (carbon paper 9) in the hot pressing condition fusing just, diffusion layer material (carbon paper 9) surface is also plastified, make membrane electrode thickness the same, as Figure 10, Figure 11, Figure 12 with the extension seal ring thickness.
Above-mentioned all methods all are to utilize PUR plastics disposable membrane electrode and frame thereof finished when the hot pressing electrode, and the thickness of frame equates that with membrane electrode the frame surface is smooth macromolecular elastomer.When baffler 6 and this membrane electrode 14 are assembled into fuel cell, can on baffler 6, establish sealing ring 8 (rigidity or retractility elastomer) and reach sealing purpose.
Claims (1)
1, a kind of hermetically-sealed construction of fuel cell, comprise membrane electrode, baffler, sealing ring, in the middle of described membrane electrode is located at, described baffler is pressed together on the two sides of this membrane electrode, described sealing ring is located at the surface of baffler and membrane electrode pressing, it is characterized in that, described membrane electrode comprises active region and seal area, wherein, seal area be located at the active region around, described active region comprises proton exchange membrane, the porousness backing material, catalyst, this catalyst is attached on the porousness backing material and be pressed together on the proton exchange membrane two sides, described seal area is stretched out by the porousness backing material of active region and fills osmotic heat melten gel plastics or thermoset rubber, resin is formed, and the thickness in sealing district is identical with the thickness of active region; Described porousness backing material extends out to the outer rim edge of seal area, described PUR plastics or thermoset rubber, resin are three layers, wherein the intermediate layer is located in the middle of the porousness backing material of extension, two-layer in addition porousness backing material two outsides that are located at extension, and the mode by hot pressing should two-layer PUR plastics or thermoset rubber, resin penetration go into porousness backing material inside, three-layer sealed material combines together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021576564A CN100346501C (en) | 2002-12-23 | 2002-12-23 | Sealing structure of fuel battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021576564A CN100346501C (en) | 2002-12-23 | 2002-12-23 | Sealing structure of fuel battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1510770A CN1510770A (en) | 2004-07-07 |
| CN100346501C true CN100346501C (en) | 2007-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021576564A Expired - Lifetime CN100346501C (en) | 2002-12-23 | 2002-12-23 | Sealing structure of fuel battery |
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| CN (1) | CN100346501C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100382368C (en) * | 2005-03-04 | 2008-04-16 | 比亚迪股份有限公司 | Membrane electrode and single fuel cell and fuel cell pack including the same |
| CN100468831C (en) * | 2005-06-16 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Seal structure of fuel cell |
| CA2631439C (en) | 2005-12-22 | 2011-04-26 | Nissan Motor Co., Ltd. | Sealing structure for fuel cell |
| DK2045861T3 (en) * | 2007-10-05 | 2012-07-02 | Topsoe Fuel Cell As | Seal for a porous metal carrier in a fuel cell |
| DE102007057386A1 (en) * | 2007-11-27 | 2009-05-28 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co.KG | Assembly and electrochemical sensor with such an assembly, in particular conductivity sensor |
| CN101656323B (en) * | 2009-03-31 | 2011-11-09 | 中国科学院长春应用化学研究所 | Method for sealing fuel cell |
| CN110444790B (en) * | 2019-08-29 | 2020-12-04 | 武汉中极氢能产业创新中心有限公司 | Membrane electrode assembly, preparation method and fuel cell |
| CN112952137A (en) * | 2019-12-11 | 2021-06-11 | 中国科学院大连化学物理研究所 | Sealing structure of membrane electrode protective film of fuel cell |
| CN111146472B (en) * | 2020-01-09 | 2023-09-22 | 李肖宏 | Hydrogen fuel cell |
| CN114864990B (en) * | 2022-05-27 | 2023-11-28 | 上海电气集团股份有限公司 | Method for preparing single cell of fuel cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6255874A (en) * | 1985-09-03 | 1987-03-11 | Fuji Electric Co Ltd | Sealing structure for fuel cell |
| JP2000323156A (en) * | 1999-05-13 | 2000-11-24 | Mitsubishi Plastics Ind Ltd | Solid polymer type fuel cell |
| JP2001015133A (en) * | 1999-07-01 | 2001-01-19 | Mitsubishi Plastics Ind Ltd | Solid polymer type fuel cell |
| JP2001118592A (en) * | 1999-10-18 | 2001-04-27 | Matsushita Electric Ind Co Ltd | Polymer electrolyte type fuel cell and stack thereof |
| JP2001196082A (en) * | 2000-01-07 | 2001-07-19 | Honda Motor Co Ltd | Electrode unit for phosphoric acid fuel cell |
| JP2002042835A (en) * | 2000-07-19 | 2002-02-08 | Mitsubishi Heavy Ind Ltd | Sealing structure of fuel cell |
-
2002
- 2002-12-23 CN CNB021576564A patent/CN100346501C/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6255874A (en) * | 1985-09-03 | 1987-03-11 | Fuji Electric Co Ltd | Sealing structure for fuel cell |
| JP2000323156A (en) * | 1999-05-13 | 2000-11-24 | Mitsubishi Plastics Ind Ltd | Solid polymer type fuel cell |
| JP2001015133A (en) * | 1999-07-01 | 2001-01-19 | Mitsubishi Plastics Ind Ltd | Solid polymer type fuel cell |
| JP2001118592A (en) * | 1999-10-18 | 2001-04-27 | Matsushita Electric Ind Co Ltd | Polymer electrolyte type fuel cell and stack thereof |
| CN1379919A (en) * | 1999-10-18 | 2002-11-13 | 松下电器产业株式会社 | Polymer electrolyte fuel cell and its manufacturing method |
| JP2001196082A (en) * | 2000-01-07 | 2001-07-19 | Honda Motor Co Ltd | Electrode unit for phosphoric acid fuel cell |
| JP2002042835A (en) * | 2000-07-19 | 2002-02-08 | Mitsubishi Heavy Ind Ltd | Sealing structure of fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1510770A (en) | 2004-07-07 |
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