CN102473927B - Metal separator for fuel cell, and fuel cell stack provided with same - Google Patents
Metal separator for fuel cell, and fuel cell stack provided with same Download PDFInfo
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- CN102473927B CN102473927B CN200980160727.3A CN200980160727A CN102473927B CN 102473927 B CN102473927 B CN 102473927B CN 200980160727 A CN200980160727 A CN 200980160727A CN 102473927 B CN102473927 B CN 102473927B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0206—Metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/028—Sealing means characterised by their material
- H01M8/0284—Organic resins; Organic polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to a metal separator for a fuel cell, and a fuel cell stack provided with the same, wherein the metal separator for a fuel cell comprises: a channel portion comprising reaction gas channels which are formed at the center and are protruded from a first surface to a second surface, and a cooling water channel which is formed between reaction channels protruded at the second surface; a metal main body portion which is integrated with the channel portion at the four side edges of the channel portion and has openings which penetrate the first surface and the second surface and are formed at the two side surfaces facing each other; a polymer manifold-gasket assembly comprising a manifold portion which is formed as a divided space at the openings for the supply and discharge of a reaction gas and cooling water, and a gasket which is integrated with the manifold portion at the edge of the metal main body portion and a region required for sealing; and reaction gas inflow/outflow holes which are integrated with the manifold-gasket assembly. By the configuration, the present invention enables a smoother flow of the reaction gas and cooling water flowing through the reaction gas channels and the cooling channel, obtains stiffness of a metal separator, and improves the durability of a metal separator.
Description
Technical field
The present invention relates to a kind of metal separator plate for fuel cell and there is the fuel cell stack of this metal separator.Relate to a kind of utilization in more detail and comprise reaction gas passage and cooling-water duct, and utilize the manifold-gasket assembly comprising and form integrated macromolecule manifold portion with pad to maintain bubble-tight technology.
Background technology
Usually, fuel cell refers to the Blast Furnace Top Gas Recovery Turbine Unit (TRT) that chemical energy is electric energy by the oxidation, the reduction reaction that utilize hydrogen and oxygen.At negative pole, hydrogen is oxidized and be separated into hydrogen ion and electronics, and hydrogen ion moves to positive pole by electrolyte.Now, electronics moves to positive pole by circuit.Occur to be undertaken reacting by hydrogen ion, electronics and oxygen at positive pole and become the reduction reaction of water.
First, observe the metal separator plate for fuel cell of prior art, form the metallic body part of rectangular form, wherein heart portion forming reactions gas passage and cooling-water duct, and be formed with the pad surrounding its periphery.
Secondly, form at the both sides separating plate of above-mentioned channel part that oxygen (air) flows into manifold, cooling water flows into manifold and hydrogen flows into manifold, and flow between manifold and channel part at oxygen (air) and be formed with reacting gas ostium.
Now, pad is formed as the bubble-tight structure that can maintain above-mentioned each manifold and reacting gas ostium periphery.Here, the part that structure as above is assembled is referred to as the inflow part of metal separator plate for fuel cell, is then referred to as discharge portion with its opposite side in opposite directions.
Therefore, in the position with above-mentioned inflow part symmetry, forming reactions gas discharge hole, oxygen (air) discharge manifold, cooling water discharges manifold and hydrogen discharges manifold.
In the fuel cell of said structure, especially with regard to solid polymer fuel cell (PolymerElectrolyte Membrane Fuel Cell, PEMFC), to polyelectrolyte membrane (polymer electrolyte membrane) supply response gas and the gas inflow/discharge structure carrying out the metal separator of discharging will become one of key factor of the performance determining fuel cell.Further, reacting gas inflow/tap can improve the durability of metal separator, can work as the key element improved needed for fuel battery performance.
With regard to fuel cell stack in the past, in the two-sided reactant gas flow having fuel gas and reducing gas respectively of film-electrode bond (MEA), connecting unit cells by metal separator makes fuel cell stack superpose, and, be separated fuel gas, reducing gas and cooling water, in order to avoid mix mutually.And pad plays sealed reaction gas and cooling water, with the effect of anti-leak.Now, different from graphite-like separating plate, with regard to the metal separator made by the method for sheet forming, in order to ensure the air-tightness between reacting gas and cooling water, flow into structure from reactant gas manifold to the reacting gas of reaction gas passage inside and unavoidably become complicated.
Especially, existing fuel cell is all form metal separator by punch process.Now, when using process for stamping forming reactions gas passage and cooling-water duct, the width of reaction gas passage will be caused to diminish; Directly when metal separator forming reactions gas inflows/tap, due to the failed possibility of trickle processing greatly, the inadequate problem smoothly of flowing of the gas that thus causes reacting.Further, directly when separating plate forming reactions gas inflow/tap, due to the reduced stiffness of thin plate, thus exist and just one turn round the problem also easily causing gas to flow into malformation a little.
And, need the slim segmentation framework of manifold portion formation for being divided into reactant gas manifold and coolant manifold at metal separator, and this segmentation framework is compared with other separating plate parts, its opposed configuration is thin and fragile, and therefore the danger of the inflow malformation of reacting gas is very large.
When there is this distortion, the smooth outflow of reacting gas and cooling water will be hindered.Therefore, to peripheral device, especially great load is executed to fuel cell air blast or pump, cause system effectiveness to reduce.
In order to solve problem as above, the present invention proposes and be coated with in the part deformed the technology being applied to and preventing the extra pad be out of shape.But by the compression that the load-carrying that the support that pad carries out cannot thoroughly get rid of fuel cell stack causes, and in the disengaging of extra pad when transversal reacting gas inflow part, more become large problem by there will be resistance when reacting gas flows into.
Summary of the invention
Technical problem
One object of the present invention is, provides a kind of and the size of metal separator can be made to minimize also can guarantee the metal separator plate for fuel cell of cooling performance and reaction gas flow paths and have the fuel cell stack of this metal separator.
Simultaneously, another object of the present invention is, there is provided a kind of provide to define with integral manner formed cooling water and flow into/discharge manifold portion and reacting gas and flow into/discharge the manifold portion of manifold portion and guarantee the manifold-gasket assembly structure of bubble-tight pad of channel part, and while there is simple structure, be easy to the metal separator plate for fuel cell manufactured and the fuel cell stack with this metal separator.
Simultaneously, another object of the present invention is, there is provided one on manifold-gasket assembly with integral manner forming reactions gas inflow/tap, thus when in conjunction with fuel cell stack, the metal separator plate for fuel cell deformed at metal separator and the fuel cell stack with this metal separator can be prevented by combining pressure.
Technical solution
Metal separator plate for fuel cell of the present invention, it is characterized in that, comprise: metallic body part, its have be formed at central part and from first surface to second outstanding and formed reaction gas passage, the cooling-water duct formed between the above-mentioned reaction gas passage protruding from above-mentioned second and in the both sides of above-mentioned reaction gas passage and above-mentioned cooling-water duct respectively with a morphogenetic inlet opening portion of peristome and outlet opening portion, and cutting part, it surrounds each edge in above-mentioned inlet opening portion and above-mentioned outlet opening portion, and above-mentioned inlet opening portion and above-mentioned outlet opening portion are divided into the first reactant gas manifold region respectively, coolant manifold region and the second reactant gas manifold region: also comprise pad, pad is formed at the above-mentioned first surface of above-mentioned metal separator and the edge top of above-mentioned second respectively.
Here, the invention is characterized in, above-mentioned inlet opening portion is formed as the form only making the side portion in the above-mentioned two sides in opposite directions of above-mentioned metallic body part residual, thus provides the path that reacting gas and cooling water flow into; Above-mentioned outlet opening portion is formed as the form only making the opposite side edge in the above-mentioned two sides in opposite directions of above-mentioned metallic body part residual, thus provides the path of above-mentioned reacting gas and the above-mentioned cooling water discharge making to flow out via above-mentioned reaction gas passage and above-mentioned cooling-water duct.
The invention is characterized in, above-mentioned pad comprises the reacting gas ostium be formed between above-mentioned inlet opening portion and above-mentioned reaction gas passage and the reacting gas tap be formed between above-mentioned reaction gas passage and above-mentioned outlet opening portion with integral manner, above-mentioned reacting gas ostium and above-mentioned reacting gas tap, have the gas inflow/discharge structure connecting the first surface of above-mentioned pad and second of above-mentioned pad with " S " font.
And the fuel cell stack of one embodiment of the invention, is characterized in that, formed by multiple connected structure lamination formed by above-mentioned metal separator and film-electrode bond (MEA).
Further, the fuel cell stack of one more embodiment of the present invention, is characterized in that, comprising: laminar structure thing, and it to be engaged with respective first surface form in opposite directions by two above-mentioned metal separators and forms; And film-electrode bond, it is formed at the top of above-mentioned laminar structure thing.
Favourable effect
Metal separator of the present invention and the fuel cell stack with this metal separator are formed has with integral manner the metallic body part that reacting gas and cooling water flowed into/discharged manifold portion, thus can bring the performance improving fuel cell, the effect increasing production efficiency when not increasing the thickness of separating plate, area and volume.
And, metal separator of the present invention and there is this metal separator fuel cell stack when adopting the separating plate of metal material, be divided into by pad and flow into manifold portion and discharge manifold portion, and gas inflow/tap is formed in pad with integral manner, thus inflow/expulsion efficiency can be increased.Further, compared to the direct situation forming inflow/tap at metal separator, have and can shorten manufacturing time, reduce the effect manufacturing unit price.
And, because pad of the present invention has reacting gas inflow/tap with integral manner, therefore compared to the situation forming inflow/tap at metal separator, the ability of anti-geometric distortion is more outstanding, the flow resistance of reacting gas can be reduced, reduce pressure drop rate.
And, metal separator of the present invention and the fuel cell stack with this metal separator also have the manifold portion cutting part of pad, thus there is the distortion that more reliably can prevent metal separator and pad, allow the lamination between separating plate become the effect be more prone to.
Accompanying drawing explanation
Fig. 1 is the vertical view representing metal separator plate for fuel cell of the present invention.
Fig. 2 is the vertical view of the metallic body part representing metal separator plate for fuel cell of the present invention.
Fig. 3 represents the vertical view being suitable for the manifold-gasket assembly of metal separator plate for fuel cell of the present invention in the metallic body part of above-mentioned Fig. 2.
Fig. 4 is the vertical view amplifying the inflow part representing metal separator plate for fuel cell of the present invention.
Fig. 5 is the cutaway view in the cross section in the A1-A2 direction representing above-mentioned Fig. 4.
Fig. 6 is the cutaway view in the cross section in the B 1-B2 direction representing above-mentioned Fig. 4.
Fig. 7 is the cutaway view in the cross section in the C1-C2 direction representing above-mentioned Fig. 4.
Embodiment
Below, metal separator plate for fuel cell of the present invention and the fuel cell stack with this metal separator are described in detail.
Fig. 1 is the vertical view representing metal separator plate for fuel cell of the present invention.
With reference to Fig. 1, with metallic body part 100 for benchmark, there is in both sides the first reacting gas inflow manifold 120, cooling water flows into manifold 124, second reacting gas inflow manifold 128, first reacting gas discharge manifold 160, cooling water is discharged manifold 164 and the second reacting gas discharge manifold 168, and had reaction gas passage 140 and cooling-water duct 145 at the central part of metallic body part 100.
Wherein, reaction gas passage 140 is formed as from the first surface of the metallic body part form outstanding to second, and cooling-water duct 145 refers to the region between the outstanding part of reaction gas passage 140.Further, the core of the metallic body part 100 comprising reaction gas passage 140 and cooling-water duct 145 is called channel part.
Then, first reacting gas flows into manifold 120, cooling water flows into manifold 124 and the second reacting gas inflow manifold 128 is defined by the polymeric mold structure of integration, in the present invention, this mould structure is referred to as inflow manifold portion, is referred to as discharge manifold portion to the mould structure that the first reacting gas discharge manifold 160, cooling water discharge manifold 164 and the second reacting gas discharge manifold 168 define.
And be formed and make four sides of channel part guarantee bubble-tight pad, in the present invention, as shown in the figure, multiple above-mentioned manifold portion and pad form as one.Therefore, in the present invention, the integrated structure of this manifold portion and pad is defined as manifold-gasket assembly 130.
Now, above-mentioned inflow manifold portion comprises: the first cutting part 122, it flows into manifold areas to the first reacting gas and cooling water inflow manifold areas is split, and the second cutting part 126, and it flows into manifold areas to cooling water and the second reacting gas inflow manifold areas is split; Above-mentioned discharge manifold portion comprises: the 3rd cutting part 162, and it discharges manifold areas to the first reacting gas and cooling water discharge manifold areas is split; 4th cutting part 166, it discharges manifold areas to cooling water and the second reacting gas discharge manifold areas is split.Further, the manifold-gasket assembly 130 between above-mentioned each manifold portion and channel part has the structure comprising reacting gas ostium 135 and reacting gas tap 150 with integral manner.
In the past, above-mentioned cutting part and reacting gas inflow/tap are formed at metallic body part, therefore the problem of metal separator bulk strength and air-tightness reduction has been caused, but provide in the present invention and make the cutting part of initiation the problems referred to above and reacting gas inflow/tap form integrated structure with manifold-gasket assembly, thus the fundamental characteristics of metal separator can be improved, and then also can improve the efficiency of fuel cell.
The metal separator plate for fuel cell of the present invention being formed as said structure is combined by multiple lamination and forms fuel cell stack, and now, the film-electrode bond (MEA) being used for electrogenesis is inserted in the region between each metal separator.Here, manifold-gasket assembly of the present invention can improve the air-tightness between each metal separator or between metal separator and film-electrode bond, and stably can be performed supply and the discharge of reacting gas by the manifold portion of integration.
Here, with the first reacting gas flow into manifold 120 and the second reacting gas flow into manifold 128 for benchmark be described time, the first reacting gas flows into the effect that manifold 120 and the second reacting gas inflow manifold 128 reaction gas passage 140 played to metallic body part 100 supplies the reacting gas such as hydrogen or oxygen (air).Now, if the first reacting gas is oxygen (air), the second reacting gas is then hydrogen, also can be contrary with this situation.
The reacting gas flowing into above-mentioned manifold is guided to reaction gas passage 140, and is flowed in its surface along metallic body part 100, thus react with electrode (not shown).Now, in fuel cell stack of the present invention, between above-mentioned metallic body part 100 and electrode (not shown), also form gas diffusion layers (Gas Diffusion Layer, GDL), impel the flowing of reacting gas to be more prone to.
Then, observing the method for the metallic body part 100 forming metal material of the present invention, in order to reduce the storehouse volume of fuel cell, being preferably formed as thin plate.Meanwhile, in metallic body part 100, reaction gas passage 140 is formed by the stamping procedure by forcing press.Now, reaction gas passage 140 is from the first surface form outstanding to second, and becomes the form of protuberance on the second surface in Baltimore groove portion on the first face.
Here, for Baltimore groove portion, the reaction gas passage 140 shown in above-mentioned Fig. 2 is described.Therefore, illustrated part becomes first surface, calls it as reaction gas dignity, and the second face that the protuberance of reaction gas passage 140 is formed is called the cooling water surface.
Further, during to cool the water surface (the second face) for benchmark, the region between outstanding reaction gas passage 140 becomes cooling-water duct 145.Now, the cooling water being flowed into metallic body part 100 by coolant manifold 124 is cooled while cooling-water duct 145 flows to the reaction heat of fuel cell.
As mentioned above, the metal separator plate for fuel cell of one embodiment of the invention, by stamping procedure, at metallic body part 100 forming reactions gas passage 140 and cooling-water duct 145.And, in order to make reacting gas and cooling water flow into reaction gas passage 140 and cooling-water duct 145 swimmingly or discharge from reaction gas passage 140 and cooling-water duct 145, preferably critically form small reacting gas inflow/tap in the both sides of metallic body part 100.But as shown in the figure, when reaction gas passage 140 and cooling-water duct 145 are formed as multiple passage, forming the small reacting gas inflow/tap with stage portion in metallic body part 100 is the operation being extremely difficult to realize.Namely, when in the past, the periphery that should be formed as utilizing pad to carry out a pair reacting gas inflow/tap carries out airtight structure, but this process is extremely difficult to carry out, and, when carrying out microminiaturization, cause airtight construction failure because of assumption of risk, inflow/the discharge of reacting gas is smooth and easy not, the danger that metallic body part 100 deforms.
Therefore, in the present invention, structure reacting gas inflow/tap 135,150 being formed in manifold-gasket assembly 130 with integral manner is used.As mentioned above, reacting gas inflow/the tap 135,150 being formed at manifold-gasket assembly 130 with integral manner compares the situation directly forming hole in metallic body part, be more prone to processing, and can embody and flow in structure the gas stablizing the structure that uses identical at graphite separating plate gas and flow into structure.
Simultaneously known, in the present invention, the segmentation of the first reacting gas inflow manifold 120, cooling water inflow manifold 124, second reacting gas inflow manifold 128, first reacting gas discharge manifold 160, cooling water discharge manifold 164 and the second reacting gas discharge manifold 168 realizes by manifold-gasket assembly 130.Namely, the space of the segmentation of each manifold is in the past formed by the predetermined segmentation framework structure being formed at metallic body part, in contrast, structure used in the present invention is, when processing metal body 100, after manifold portion being formed as a peristome form merged, be divided into each region by manifold-gasket assembly 130.Now, the present invention has the mode different from the segmentation framework structure being formed at metallic body part in the past, the flowing of cooling water and reacting gas is caused to be hindered therefore, it is possible to solve because of the impurity that may produce in segmentation framework structure, the problem of the efficiency reduction of fuel cell.That is, when use of the present invention comprise the metal separator of manifold-gasket assembly 130, fundamentally can prevent problem in the past.
And, as shown in the figure, the problem of the rigidity reduction that may occur because of slim metal separator being made up by forming the first cutting part 122, second cutting part 126, the 3rd cutting part 162 and the 4th cutting part 166, and, can easily arrange when lamination separating plate.Therefore, if use metal separator plate for fuel cell of the present invention, there is the advantage that fuel cell stack can be made to manufacture efficiency maximization.
Simultaneously, when only observation comprises the above-mentioned manifold-gasket assembly structure of one-piece type manifold portion and manifold cutting part, in view of by the upper ascending effect strengthening above-mentioned rigidity to obtain, also can being selectively applied in the structure of forming reactions gas inflow/tap in metallic body part.
Fig. 2 is the vertical view of the metallic body part representing metal separator plate for fuel cell of the present invention.
With reference to Fig. 2, as metallic body part of the present invention, comprise and be formed at central part and and cooling-water duct 245 of the reaction gas passage 240 that formed and the reaction gas passage 240 that protrude from second between formation outstanding to second from first surface.Here, when the region comprising reaction gas passage 240 and cooling-water duct 245 is called channel part, to form one-piece type mode in four side edge of above-mentioned channel part and above-mentioned channel part, be formed with peristome 220A, 260A of through first surface and second in two sides in opposite directions respectively, thus complete the metallic body part 200 of rectangle form.
Here, inlet opening portion 220A is formed as the peristome form of the rectangle of an only residual side portion in the two sides of metallic body part 200, and is provided as the path making reacting gas and cooling water flow into.
And, outlet opening portion 260A to be formed as in the two sides of above-mentioned metallic body part 200 the peristome form of the rectangle of only residual opposite side edge, and is provided as making the path of reacting gas and the cooling water discharge of flowing via reaction gas passage 240 and cooling-water duct 245 from inlet opening portion 220A.
Metallic body part 200 due to structure as above does not comprise the manifold segmentation framework portion in the past of structural anti-geometric distortion ability, thus has the effect that fundamentally can prevent the problem of defective item in advance.
Meanwhile, because reacting gas ostium or reacting gas tap are not directly formed at metallic body part 200, thus can simplify and manufacture the operation of metallic body part, and can solve and cause because forming hole the problem that the intensity of body reduces.
Fig. 3 represents the vertical view being suitable for the manifold-gasket assembly of metal separator plate for fuel cell of the present invention in the metallic body part of above-mentioned Fig. 2.
With reference to Fig. 3, manifold-gasket assembly 230 of the present invention is formed as the form being combined with manifold portion and pad.First, pad is formed at the position of four side edge of channel part and the sealing of needs in addition with polymeric mold structure, here, represent the part of the gabarit being formed at the channel part comprising reaction gas passage 240 and cooling-water duct 245 with quadrangle form, and the first surface be identically formed in metallic body part 200 and second.
Then, manifold portion is formed as comprising the inflow manifold portion of the polymeric mold structure of the first cutting part 222 and the second cutting part 226 with integral manner and comprising the discharge manifold portion of polymeric mold structure of the 3rd cutting part 262 and the 4th cutting part 266 with integral manner, above-mentioned first cutting part 222 flows into manifold 220 to the first reacting gas and cooling water inflow manifold 224 is split, second cutting part 226 pairs cooling water flows into manifold 224 and the second reacting gas inflow manifold 228 is split, 3rd cutting part 262 discharges manifold 260 to the first reacting gas and cooling water discharge manifold 264 is split, 4th cutting part 266 pairs cooling water discharges manifold 264 and the second reacting gas discharge manifold 268 is split.Now, as shown in FIG. 6 and 7, manifold portion is formed as the form embedding metallic body part.
As mentioned above, manifold portion of the present invention possesses partition space voluntarily by polymeric mold structure, instead of carrys out partition space by metallic body part, and what can prevent metal separator design alteration from bringing thus in advance is unnecessary bad.
Further, manifold-gasket assembly 230 of the present invention, as the embodiment form shown in above-mentioned Fig. 3, can be formed by the mode solid-state mould structure thing customized in advance being attached to metallic body part 200.Further, can manufacture by utilizing injection moulding to be applied directly to metallic body part 200.Now, if utilize injection moulding to manufacture, then without the need to adherence method separately and attachment operation, the time required when manufacturing fuel cell stack can be shortened thus.
Meanwhile, extra fixed part (not shown) can be pre-formed in the presumptive area that will form manifold-gasket assembly 230 of metallic body part 200.When by stamping procedure at metallic body part 200 forming reactions gas passage time, together form manifold-gasket assembly 230 fixed part, prevent the disengaging of installed manifold-gasket assembly 230.In this case, because the structure of manifold-gasket assembly 230 of the present invention is relatively simpler than gasket construction in the past, and easily regulate its live width, there is advantage thus that can guarantee the leeway (margin) be arranged on fixed part further.
Then, manifold-gasket assembly 230 of the present invention has and comprises the reacting gas ostium 235 between inlet opening portion 220A and reaction gas passage 240 be formed at as shown in Figure 3 above and the structure being formed at the reacting gas tap between reaction gas passage 240 and the outlet opening portion 260 as described in above-mentioned Fig. 3 with integral manner.
Now, preferably, reacting gas ostium 235 and reacting gas tap 250 are formed as the structure formation connecting the first surface of manifold-gasket assembly 230 and second of pad with " S " font.Now, first surface refers to, points to the surface in the direction identical with the reaction gas dignity of metallic body part 200; Second face refers to, points to the surface in the direction identical with the cooling water surface.In such an embodiment, the part flowed into reacting gas for benchmark be described time, become following structure: flow into and be formed at the cooling water surface (back side in the face shown in Fig. 3, therefore do not show) the reacting gas of groove via reacting gas ostium 235, along the groove being formed at reaction gas dignity, naturally flow into the reaction gas passage 240 being formed at metallic body part 200.
Reacting gas ostium 235 related to this and the concrete structure of reacting gas tap 250 are described in Fig. 6 and Fig. 7 below.
Fig. 4 is the vertical view amplifying the inflow part representing metal separator plate for fuel cell of the present invention.
With reference to Fig. 4, the same with said structure, there is metallic body part 300, first reacting gas and flow into manifold 320, first cutting part 322, the inflow of cooling water inflow manifold 324, second cutting part 326, second reacting gas manifold 328, the reaction gas passage 340 of spill, cooling-water duct 345.Here, there is the reacting gas ostium 355 being formed in manifold-gasket assembly 330 part between manifold portion and channel part with integral manner.
In order to more specifically observe this structure, after cutting off by A1-A2, B 1-B2, C1-C2 direction, each cross section is observed, specific as follows.
Fig. 5 is the cutaway view in the cross section in the A1-A2 direction representing above-mentioned Fig. 4.
Known with reference to Fig. 5, occur that manifold-gasket assembly 330 surrounds the form of the inner side edge of metallic body part 300.Manifold-gasket assembly 330, first cutting part 322 here occurred and the second cutting part 326 all represent manifold portion, and these will become the polymeric mold form defined the second reacting gas inflow manifold 328, first reacting gas inflow manifold 330 and cooling water inflow manifold 324.
Further, as mentioned above, for the present invention, there is not extra frame section, therefore do not produce the danger of defective item completely, and desirable strength can be obtained by respective cutting part, easily carry out the arrangement between separating plate.
Fig. 6 is the cutaway view in the cross section in the B 1-B2 direction representing above-mentioned Fig. 4.
With reference to Fig. 6, Fig. 6 be cut off by the B 1-B2 direction of above-mentioned Fig. 4 after, the form illustrated after metallic body part 300 is turned over.That is, be for shown in benchmark with the cooling water surface of metallic body part 300 (the second face).Therefore, form the reaction gas passage 340 in the form outstanding to top, the fold on its side becomes cooling-water duct 345.
Here, with reacting gas ostium 355 for known when benchmark is observed, there is " S " font reaction gas flow paths connected to reaction gas passage direction by the first reacting gas inflow manifold 320.Here, " S " font is in falling font, and a part surperficial second of manifold-gasket assembly 330 forms groove, and forms the reacting gas ostium 355 of the central part of through-manifolds-gasket assembly 330, to be connected with above-mentioned groove; , form groove, to be connected with above-mentioned reacting gas ostium 355 on the first surface surface of manifold-gasket assembly 330.Under this configuration, reacting gas can natural flow channel portion.
Now, preferably, the length D1 of the linking part of metallic body part 300 and manifold-gasket assembly 330 guarantees sufficient length, to guarantee air-tightness and stable joint.If but length is long, may occur that reacting gas ostium 355 is partially damaged or effectively cannot utilizes the problem of metallic body part 300 area.Therefore, consider above-mentioned item, preferably design manifold-gasket assembly 330.
Fig. 7 is the cutaway view in the cross section in the C1-C2 direction representing above-mentioned Fig. 4.
The same with above-mentioned Fig. 6, Fig. 7 is also the figure making it cool the water surface (the second face) to illustrate towards top that metallic body part 300 turned over.Owing to being the cutting carried out for benchmark with the first cutting part 322, therefore illustrate only a part for the first cutting part 322.Now, the first reacting gas is flowed into the edge of manifold 320 and is called " D2 " with the length being connected part of manifold-gasket assembly 330, under the length not being connected part is called " D3 " situation, when the length of D3 reduces, relatively the length of D2 increases.Now, air-tightness will increase, but the utilization ratio of separating plate body will reduce.
And when the length of D2 reduces, relatively the length of D3 increases.Now, may occur that air-tightness reduces, and the situation of the reduced space of manifold portion, therefore consider its efficiency, preferably design manifold-gasket assembly 330.
Here, above-mentioned Fig. 6 and Fig. 7 is all divided into benchmark to be illustrated with reacting gas inflow part, but this is equally applicable to reacting gas discharge section, and it is suitable for the impact that possibility is not subject to the first reacting gas and the second reacting gas.
In addition, when forming fuel cell stack, may occur the central part the closer to storehouse, the form of manifold becomes narrower situation.Under this composite construction, need in the past to change metallic body part structure one by one, but in the present invention, only need change the polymeric mold structure forming manifold portion, therefore, it is possible to effectively improve fuel cell stack manufacturing process.
As mentioned above, metal separator of the present invention and the fuel cell stack possessing this metal separator are formed with the metallic body part being suitable for the manifold-gasket assembly flowing into/discharge manifold portion and pad with integral manner forming reactions gas and cooling water, thus effectively can improve the performance of fuel cell when not changing the thickness of separating plate, area and volume.Namely, what be suitable for is by manifold-gasket assembly, the while of keeping metal separator plate for fuel cell bubble-tight, be suitable for the new structure being divided into reacting gas and cooling water to flow into/discharge manifold, guarantee the rigidity of fuel cell stack by the cutting part of manifold portion and expand its range of application further.
And, following metal separator plate for fuel cell can be produced, reacting gas inflow/tap is formed in manifold-gasket assembly with integral manner by this metal separator plate for fuel cell, thus reacting gas inflow/expulsion efficiency can be improved, compared to the metal separator in the past with integral manner with reacting gas inflow/tap, the ability that can produce anti-geometric distortion is outstanding, the flow resistance of reacting gas can be reduced, reduce the metal separator plate for fuel cell of pressure drop amount.Further, compared to the situation directly forming inflow/tap on metal separator in the past, can manufacturing time be shortened, reduce and manufacture unit price.
Simultaneously, as mentioned above, film-electrode bond (MEA) is bonded on a metal separator plate for fuel cell of the present invention or make the reaction gas of above-mentioned metal separator dignity engage in mode in opposite directions after lamination film-electrode bond, thus the fuel cell stack of manifold with high efficiency, various form can be produced.
Here, film-electrode bond is a structure in each parts of fuel cell, plays and utilizes reacting gas to cause the effect of electrochemical reaction.Now, can also comprise as the gas diffusion layers (GDL) for making reacting gas be dispersed to the porous media on film-electrode bond (MEA) surface equably, metal separator plate for fuel cell of the present invention, for supporting film-electrode bond (MEA) and gas diffusion layers (GDL), plays the effect of the electricity that transport of reactant gases body and cooling water and collection and transmission generate.
In the present invention, dozens of or hundreds of the metal separator plate for fuel cells comprising film-electrode bond (MEA) and gas diffusion layers (GDL) can be stacked up, produce fuel cell stack.The response area of the generate output of fuel cell and film-electrode bond (MEA) and the lamination amount of storehouse proportional.Now, manifold-the gasket assembly of macromolecule material of the present invention can allow hydrogen, oxygen and cooling water at each face smooth outflow of film-electrode bond (MEA) and gas diffusion layers (GDL), separating plate when fuel cell power generation, and guarantee air-tightness, to prevent each reacting gas and the mixing of cooling aqueous phase, guarantee that the reacting gas being delivered to metal separator flows into swimmingly/discharges.Therefore, when fuel cell system works, its maximizing efficiency can be made.
Claims (7)
1. a metal separator plate for fuel cell, is characterized in that, comprising:
Metallic body part, it has channel part and peristome, described channel part comprises and is formed at central part and and the reaction gas passage that formed and the cooling-water duct that the above-mentioned reaction gas passage that protrude from above-mentioned second between formed outstanding to second from first surface, described peristome to be located at four side edge of above-mentioned channel part with above-mentioned channel part all-in-one-piece mode, and is formed with through above-mentioned first surface and second respectively in two sides in opposite directions; And
Manifold-the gasket assembly of macromolecule material, at above-mentioned peristome, the manifold portion that the space being formed to split in order to the supply of reacting gas and cooling water and discharge possesses, above-mentioned metallic body part edge and need the position of sealing, formed with above-mentioned manifold portion and be integrally formed with pad
Wherein above-mentioned peristome comprises:
Inlet opening portion, it is formed as the form only making the side portion in the above-mentioned two sides in opposite directions of above-mentioned metallic body part residual, thus provides the path that reacting gas and cooling water flow into; And
Outlet opening portion, its form being formed as only making the opposite side edge in the above-mentioned two sides in opposite directions of above-mentioned metallic body part residual, makes the above-mentioned reacting gas that flows out via above-mentioned reaction gas passage and above-mentioned cooling-water duct and above-mentioned cooling water discharge.
2. metal separator plate for fuel cell according to claim 1, is characterized in that, above-mentioned manifold portion is formed as the form of the edge embedding above-mentioned peristome.
3. metal separator plate for fuel cell according to claim 1, is characterized in that, above-mentioned manifold portion comprises the cutting part for splitting above-mentioned peristome.
4. metal separator plate for fuel cell according to claim 1, it is characterized in that, comprise reacting gas inflow/tap, described reacting gas inflow/tap is formed between above-mentioned channel part and above-mentioned peristome, and is formed on above-mentioned manifold-gasket assembly with integral manner.
5. metal separator plate for fuel cell according to claim 4, is characterized in that, above-mentioned reacting gas inflow/tap comprises the gas inflow/discharge structure with the first surface of the through above-mentioned manifold portion of " S " font and second.
6. a fuel cell stack, is characterized in that, is formed by multiple connected structure lamination formed by metal separator as claimed in claim 1 and film-electrode bond.
7. a fuel cell stack, is characterized in that, comprising:
Laminar structure thing, it is formed with respective first surface form joint in opposite directions by two metal separators as claimed in claim 1; And
Film-electrode bond, it is formed at the top of above-mentioned laminar structure thing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2009-0071020 | 2009-07-31 | ||
| KR1020090071020A KR100953273B1 (en) | 2009-07-31 | 2009-07-31 | Metal seperator for fuel cell and fuel cell stack having the same |
| PCT/KR2009/004358 WO2011013870A1 (en) | 2009-07-31 | 2009-08-04 | Metal separator for fuel cell, and fuel cell stack provided with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102473927A CN102473927A (en) | 2012-05-23 |
| CN102473927B true CN102473927B (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980160727.3A Expired - Fee Related CN102473927B (en) | 2009-07-31 | 2009-08-04 | Metal separator for fuel cell, and fuel cell stack provided with same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5436670B2 (en) |
| KR (1) | KR100953273B1 (en) |
| CN (1) | CN102473927B (en) |
| WO (1) | WO2011013870A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101090626B1 (en) | 2010-06-16 | 2011-12-08 | 현대하이스코 주식회사 | Intergrated stack voltage monitoring apparatus of fuel cell |
| KR101238975B1 (en) | 2011-04-19 | 2013-03-04 | 현대하이스코 주식회사 | Gasket covering manifold for metal seperator of fuel cell and method for fabricating the same |
| KR101337961B1 (en) | 2012-05-07 | 2013-12-09 | 현대자동차주식회사 | Manifold block for fuel cell stack |
| KR101449193B1 (en) | 2012-12-24 | 2014-10-08 | 현대자동차주식회사 | Fuel cell integrated porous body and gasket |
| JP6602152B2 (en) * | 2015-10-20 | 2019-11-06 | 本田技研工業株式会社 | Fuel cell |
| KR102083295B1 (en) * | 2019-10-28 | 2020-03-02 | 주식회사 유한정밀 | The core mold for the press |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1819313A (en) * | 2004-12-16 | 2006-08-16 | 斯奈克玛公司 | Bipolar plate for a fuel cell |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005108526A (en) * | 2003-09-29 | 2005-04-21 | Uchiyama Mfg Corp | Gasket for fuel cell, component for fuel cell, and fuel cell |
| JP4575117B2 (en) * | 2004-11-24 | 2010-11-04 | 本田技研工業株式会社 | Fuel cell stack |
| US7722977B2 (en) * | 2004-08-20 | 2010-05-25 | Honda Motor Co., Ltd. | Fuel cell stack comprising current collector provided at least at one fluid passage |
| JP4444862B2 (en) * | 2005-03-18 | 2010-03-31 | 本田技研工業株式会社 | Fuel cell or separator |
| EP2573851B1 (en) * | 2006-10-16 | 2016-09-28 | Hyundai Steel Company | Metal separator for fuel cell and fuel cell stack having the same |
| KR100778634B1 (en) | 2007-01-22 | 2007-11-28 | 현대하이스코 주식회사 | Fuel cell, fuel cell seperator in the same and fuel cell stack including the same |
| KR100802683B1 (en) | 2006-12-12 | 2008-02-12 | 현대자동차주식회사 | Seperator for fuel cell |
-
2009
- 2009-07-31 KR KR1020090071020A patent/KR100953273B1/en not_active IP Right Cessation
- 2009-08-04 JP JP2012522736A patent/JP5436670B2/en active Active
- 2009-08-04 CN CN200980160727.3A patent/CN102473927B/en not_active Expired - Fee Related
- 2009-08-04 WO PCT/KR2009/004358 patent/WO2011013870A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1819313A (en) * | 2004-12-16 | 2006-08-16 | 斯奈克玛公司 | Bipolar plate for a fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5436670B2 (en) | 2014-03-05 |
| KR100953273B1 (en) | 2010-04-16 |
| WO2011013870A1 (en) | 2011-02-03 |
| JP2013500569A (en) | 2013-01-07 |
| CN102473927A (en) | 2012-05-23 |
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