CN101540404A - Metal separator for fuel cell - Google Patents
Metal separator for fuel cell Download PDFInfo
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- CN101540404A CN101540404A CN200910128564A CN200910128564A CN101540404A CN 101540404 A CN101540404 A CN 101540404A CN 200910128564 A CN200910128564 A CN 200910128564A CN 200910128564 A CN200910128564 A CN 200910128564A CN 101540404 A CN101540404 A CN 101540404A
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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 invention provides a fuel cell with sealing performance improved by improving strength in the periphery of the manifold holes through a metal separator. The metal separator for a fuel cell includes a plurality of flow passage grooves for flowing a fluid for operating the fuel cell; manifold holes provided on each side of an upper stream and a lower stream of the plurality of flow passage grooves and making fluid flowing to flow passage grooves; attaching face for separating a plurality of fluid grooves and a plurality of manifold holes from the external when attaching a gasket to the attaching face disposed on the peripheral portion of the electrode portion of the electricity generation portion; a face-sealing portion for sealing a flat face between flow grooves and manifold holes by face contact with the attaching face of the electrode portion closer to inner side of the gasket, which is dispose on peripheral of the manifold holes; through holes in tunnel shape communicating manifold holes and flow passage grooves, which is disposed on the face-sealing portion.
Description
Technical field
The present invention relates to metal separator for fuel cell, relate in particular to the metal separator for fuel cell that can seal at the attaching face for separating branch.
Background technology
The battery metal separator that acts as a fuel, with existing graphite-like dividing plate (more than the thickness 2mm) contrast, Bao Erxiao and the exploitation with metal separator of tough structure advance.This metal separator forms the repressed moulding of the metallic plate of 0.1-0.2mm usually, by with multilayer laminated and use as sub-assembly as the MEA of Power Generation Section.Such metal separator is if compare with the graphite-like dividing plate, because the thinner thickness of the stack direction of dividing plate and electrode part, thereby its advantage is to make contributions to the densification of sub-assembly.In addition, though metal separator if with graphite-like dividing plate comparison thinner thickness, but owing to have obdurability, extensibility, in practicality, also have enough intensity, metal can not allow gas permeation, can block gas reliably, has the advantage of reliability height and so on.But the occasion of the densification of realization sub-assembly is all very difficult to the formation and the air seal of the runner of MEA from manifold portion on the stack direction of dividing plate electrode part, and existence worsens the drawback that is associated with the battery behavior of gas leakage, fuel cell.In addition, when producing leakage, the worst situation is the possibility that also under cover produces explosion accident.
Promptly, though seal by soft seal member is set usually between the Power Generation Section of metal separator and fuel cell, but because the poor dimensional precision of rubber, and intensity is also low, thereby, because of the insufficient strength of the sealing of manifold hole peripheral part produces poor sealing, sometimes because of sealing the angry gas leakage that very produces.
As the prior art of the dividing plate of relevant this sealing, known have for example technology of patent documentation 1-4.That is: patent documentation 1-TOHKEMY 2002-83614 communique, patent documentation 2-TOHKEMY 2002-298872 communique, No. 3723515 communique of patent documentation 3-Japan special permission, patent documentation 4-TOHKEMY 2006-172845 communique.
The dividing plate of Fig. 8 (a), Fig. 8 (b) expression patent documentation 1 disclosed graphite-like.Shown in Fig. 8 (a), Fig. 8 (b), the disclosed main points of the dividing plate 101 of patent documentation 1 are: from manifold hole 100 to the gas flow structure of Power Generation Section 102 (solid polymer membrane) 102, the fluid slot 103 of dividing plate 101 and the interconnecting part of manifold hole 100 are made of the through hole 104 that the face from the fluid slot 103 that formed dividing plate 101 penetrates into another face of dividing plate 101, and anode-side, cathode side and the manifold hole 100 usefulness face seals of dividing plate 101 are sealed.
Fig. 9 represents the dividing plate of patent documentation 2 disclosed graphite-likes.As shown in Figure 9, in patent documentation 2, on dividing plate 105, be formed with manifold hole 106 and fluid slot 107, and be used in connecting portion 108 connection manifold hole 106 and the fluid slots 107 that form with the opposite side of face of the fluid slot 107 that has formed dividing plate 105.The anode-side of dividing plate 105, cathode side and manifold hole 106 usefulness face seals seal.
Figure 10 represents patent documentation 3 disclosed dividing plates.As shown in figure 10, disclosed content is in patent documentation 3, in having the clad metal separator of surface conductance processing layer, interlayer seal, manifold hole 112 is arranged and have the framework 114 that forms runner to Power Generation Section 113 concurrently at dividing plate 109 superimposed layers.
In addition, disclosed content is in patent documentation 4, seals with elastomeric seal framework 114 such as rubber and with framework 114 and dividing plate combination.
If use the technology of patent documentation 3 and patent documentation 4, can form compact metal separator for fuel cell, the battery behavior of fuel cell is also very stable.
But, the occasion that the sub-assembly of patent documentation 1 and 2 graphite septum structure is made of the unit of the dividing plate that is provided with multilayer laminated thin-walled, then need increase the dividing plate of sealing usefulness at interlayer, cause cost up, and make the thickness increase of sub-assembly because of the thickness of interlayer dividing plate.The problem that existence reduces at double as the compactness of the advantage of metal separator.Have again,, also have the problem that can not be used for the metal separator of thinner thickness with its original state even the technology of patent documentation 1 and 2 is applicable to the dividing plate of the graphite-like that thickness is thicker.
On the other hand, in the occasion that forms dividing plate by patent documentation 3 and 4 disclosed technology, the problem that finally has the cost up of sub-assembly, and, in the dividing plate of patent documentation 3 and 4, even the jut that is also used as sealing is arranged, can not form the tunnel construction of communication of fluid groove one side and manifold hole one side, thereby there is worry in the reliability of sealing at the attaching face for separating dividing sinker.
Like this, using metal separator, the occasion with the thickness of the sub-assembly of the stack direction of dividing plate is done compactly must solve variety of problems.
Summary of the invention
The objective of the invention is to provides a kind of sealing height, compactness and the good metal separator for fuel cell of battery behavior by raising in the intensity of the sealing of attaching face for separating setting.
The metal separator for fuel cell that the present invention's first scheme provides has: a plurality of fluid slots of Power Generation Section that are used in the direction of flow fuel cell of operation of fuel cells; Be arranged on the upstream side and the downstream of described a plurality of fluid slots, make above-mentioned fluid flow into a plurality of manifold holes of a plurality of fluid slots respectively; When sealing gasket engages with the composition surface of the Power Generation Section of the peripheral part of the electrode part that is arranged on above-mentioned Power Generation Section, cut off the composition surface of above-mentioned a plurality of fluid slot, above-mentioned a plurality of manifold holes and above-mentioned electrode part from the outside; Be arranged on the face seal portion of above-mentioned attaching face for separating, this face seal portion has by at the smooth sealing surface of locating more in the inner part than above-mentioned sealing gasket to contact with the composition surface face of above-mentioned electrode part and carrying out face seal between to above-mentioned fluid slot and above-mentioned manifold hole; Be arranged on above-mentioned face seal portion, and be communicated with the tunnel-shaped through hole of above-mentioned manifold hole and above-mentioned fluid slot.
The metal separator for fuel cell that alternative plan of the present invention provides is on the basis of first scheme, after forming above-mentioned face seal portion with the metal separator for fuel cell split in advance, more above-mentioned face seal portion is installed on the above-mentioned attaching face for separating.
The metal separator for fuel cell that third party's case of the present invention provides be first or the basis of alternative plan on, by above-mentioned attaching face for separating bending is formed above-mentioned face seal portion.
The metal separator for fuel cell that the cubic case of the present invention provides is first to any one basis of third party's case, and a plurality of reinforcing members that will be used to strengthen above-mentioned sealing across the interval of regulation are arranged in the above-mentioned through hole.
The metal separator for fuel cell that the present invention's the 5th scheme provides is on the basis of cubic case, and a plurality of reinforcing members form by bending, thereby makes the flow of the above-mentioned fluid that flows to above-mentioned a plurality of fluid slots respectively reach even.
Effect of the present invention is as follows.
According to the present invention, the intensity of attaching face for separating increases, and the sealing of attaching face for separating improves significantly.In addition, can prevent for example leakage of reacting fluid of fluid owing to the raising of sealing, it is good that battery behavior becomes.And, can realize the reduction of densification and cost.
Description of drawings
Fig. 1 is the vertical view of an example of the metal separator for fuel cell of expression embodiments of the present invention.
Fig. 2 is the exploded view of sub-assembly of the fuel cell of expression embodiments of the present invention.
Fig. 3 is a cutaway view of looking the sub-assembly of the corresponding attaching face for separating of cutaway view with the A-A alignment of Fig. 1.
Fig. 4 is the enlarged drawing of major part of face seal portion of the metal separator of embodiments of the present invention, and Fig. 4 (a) is the vertical view that face seal portion has been amplified, and Fig. 4 (b) is the cutaway view of the R-R line of Fig. 4 (a), and Fig. 4 (c) is the cutaway view of the U-U line of Fig. 4 (a).
Fig. 5 is the stereogram of structure of the face seal portion of expression embodiments of the present invention.
Fig. 6 is the process chart of order that forms the occasion of face seal portion between the diffuser of manifold hole and upstream side by bending of expression another embodiment of the present invention.
Fig. 7 is the stereogram of expression by the face seal portion of bending formation.
Fig. 8 is the figure of the existing graphite-like dividing plate of expression.
Fig. 9 is the figure of the existing graphite-like dividing plate of expression.
Figure 10 is the structural map of the existing dividing plate of expression.
Figure 11 is the section of sub-assembly of the fuel cell of expression embodiments of the present invention, Figure 11 (a) is a cutaway view of looking the sub-assembly of the corresponding attaching face for separating of cutaway view with the A-A alignment of Fig. 1, Figure 11 (b) is a cutaway view of looking the sub-assembly of the corresponding attaching face for separating of cutaway view with the B-B alignment of Fig. 1, Figure 11 (c) is a cutaway view of looking the sub-assembly of the corresponding attaching face for separating of cutaway view with the C-C alignment of Fig. 1, and Figure 11 (d) is the cutaway view of fuel cell-fuel cell line of Fig. 1 of Power Generation Section.
Among the figure:
The 4-Power Generation Section, 4a-electrode part, 4b-carriage, 6-fluid slot, 7a, 7b, 8a, 8b, 9a, 9b-manifold hole, 11-sealing gasket, 12c-through hole, 15-face seal portion.
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.In addition, in each execution mode, to common part with identical symbolic representation.
Fig. 1 is the vertical view of an example of the metal separator for fuel cell of expression embodiments of the present invention, Fig. 2 is the exploded view of the sub-assembly of fuel cell, Fig. 3 is a cutaway view of looking the sub-assembly of the corresponding attaching face for separating of cutaway view with the A-A alignment of Fig. 1, Fig. 4 (a) is the vertical view that face seal portion has been amplified, Fig. 4 (b) is the cutaway view of the R-R line of Fig. 4 (a), Fig. 4 (c-1) is Fig. 4 (a), the cutaway view of the U2-U2 line of Fig. 4 (b), Fig. 4 (c-2) is Fig. 4 (a), the cutaway view of the true 1-U1 line of U of Fig. 4 (b), Fig. 5 is the stereogram of the structure of presentation surface sealing.In addition, the section of Figure 11 (a) expression sub-assembly, Figure 11 (a) is a cutaway view of looking the sub-assembly of the corresponding attaching face for separating of cutaway view with the A-A alignment of Fig. 1, Figure 11 (b) is a cutaway view of looking the sub-assembly of the corresponding attaching face for separating of cutaway view with the B-B alignment of Fig. 1, Figure 11 (c) is a cutaway view of looking the sub-assembly of the corresponding attaching face for separating of cutaway view with the C-C alignment of Fig. 1, and Figure 11 (d) is the cutaway view of Power Generation Section of section of fuel cell-fuel cell line of Fig. 1.
The structure of fuel cell at first, is described with reference to Fig. 2.
Among Fig. 2, the sub-assembly of label 1 expression fuel cell, 2 expression metal separators, 3 expression gas diffusion layers, MEA are represented the formation of dielectric film of the Power Generation Section of fuel cell.The Power Generation Section 4 of sub-assembly 1 is made of the carriage 4b of electrode part (for example solid macromolecule electrolyte) 4a and jointing metal system dividing plate (hereinafter referred to as dividing plate) 2, and dividing plate 2 forms by Ti, Ti alloy or Ti clad material are carried out press forming.
The battery of fuel cell is made the overlapping according to this gas diffusion layers 3 of cathode side on metal separator 2, MEA, the gas diffusion layers 3 of anode-side, the structure of metal separator 2, the sub-assembly 1 of fuel cell is by making the structure that can produce predetermined voltage with the overlapping multilayer of such battery.And, as Fig. 3, shown in Figure 11, between the battery of adjacency, be provided be used to make cooling with fluid for example the diffusion level of water diffusion divide 50.
On the dividing plate 2 of anode-side, cathode side, as shown in Figures 1 and 2, be formed with a plurality of fluid slots 6 on the electrode surface face vis-a-vis of word and Power Generation Section 4, a plurality of manifold holes are located at the upstream side and the downstream of a plurality of fluid slots 6.
As a plurality of manifold holes, on fluid slot 6, be provided with a pair of manifold hole 7a that reacting gas flows through that is used for, 7b, on another layer fluid groove 6, be provided with a pair of manifold hole 8a that oxidant gas flows through that is used for, 9b, on another layer fluid groove 6, be provided with a pair of adjustment that is used for the fluid manifold hole 9a that flows through of water for example, 9b, be used for a pair of manifold hole 7a that reacting gas flows through, 7b, be used for a pair of manifold hole 8a that oxidant gas flows through, 9b is configured in four jiaos of dividing plate 2 respectively, is used for the manifold hole 9a that adjustment flows through with fluid, 9b is configured in manifold hole 7a respectively, between the 8a.
In addition, in order to allow reacting gas (reacting gas, oxidant gas) or adjustment flow through a plurality of fluid slots 6 respectively equably with fluid, be provided with also on each dividing plate 2 that flow area enlarges gradually or diminishing a plurality of diffuser 10, sealing gasket 11 and a plurality of face seal portion 15 of sealing usefulness.
As shown in Figure 1, sealing gasket 11 is made of outside gasket portion 11a and the inner seal pad 11b of portion; Outside gasket portion 11a is and surrounds the ring-type that gas diffusion layers 3, electrode part 4a and each manifold hole 7a, 7b, 8a, 8b, 9a, 9b seal; And the inner seal pad 11b of portion is the ring-type that more in the inner part each manifold hole is sealed than outside gasket portion 11a.
With reference to Fig. 1, Fig. 3, Figure 11, above-mentioned face seal portion 15 is made of seal member 12a and a plurality of reinforcing member 12b as shown in Figure 4; Sealing parts 12a is by sealing contacting with the composition surface face of sealed portion than sealing gasket 11 position more in the inner part; This reinforcing member 12b is arranged on the seal member 12a, and forms the tunnel-shaped through hole 12c that is communicated with each manifold hole 7a, 7b, 8a, 8b, 9a, 9b and a plurality of fluid slot 6.
At this, so-called sealed portion is meant by contacting and sealed parts with seal member 12a.That is, sealed between the inlet of manifold hole 7a and diffuser 10 and between the outlet of manifold hole 7b and diffuser 10 shown in Figure 11 (a), be in above the peripheral part of dividing plate 2 of following and adjacent underneath (another layer) of the carriage 4b of electrode part 4a.In addition, sealed between the inlet of manifold hole 8a and diffuser 10 and between the outlet of manifold hole 8b and diffuser 10 shown in Figure 11 (b), be in below the peripheral part of dividing plate 2 of top and adjacent underneath (another layer) of the carriage 4b of electrode part 4a.In addition, sealed between the inlet of manifold hole 9a and diffuser 10 and between the outlet of manifold hole 9b and diffuser 10 shown in Figure 11 (c), be between the battery that is configured in adjacency the opposite face of lower clapboard 2 peripheral parts.
Each seal member 12a forms the upper surface that face seal is used smoothly.
A plurality of reinforcing member 12b carry out the face seal of sealed portion for the upper surface that utilizes seal member 12a, and in order to form the tunnel-shaped through hole that reacting gas flows through and form arch respectively.
And these reinforcing members 12b is provided with a plurality of along its length below seal member 12a, and respectively by spot welding or be bonded and fixed on the seal member 12a.In addition, each reinforcing member 12b is because so long as seal member 12a evenly gets final product the sealing force of the per unit area of above-mentioned sealed portion, thereby its shape is not limited to arch, also can be other shape.
In addition, as shown in Figure 5, establish a plurality of installation portion 12g at both ends at least and the central portion of seal member 12a.
Like this, when forming face seal portion 15 and dividing plate 2 respectively, owing to can freely select the thickness and the installation site of face seal portion 15, thereby can realize the optimization of the sealing force of face seal.In addition, owing to can suitably change the size of reinforcing member 12b and quantity, thickness, thereby can realize the optimization of the flow area of through hole 12c.And,, prolong the useful life of mould, thereby can also reduce cost owing to can help simplifying the compacting tool set of dividing plate 2.
In addition, as shown in Figure 3, when the attaching face for separating of the manifold hole 7a, the 7b that face seal portion 15 are arranged on dividing plate 2,8a, 8b, 9a, 9b, can utilize each reinforcing member 12b enhancing seal member 12a and keep straight line, under the state of having guaranteed as the through hole 12c of ostium or tap hole, make surface pressing identical on dividing plate 2 up and down.
Its result can be suppressed at the distortion on whole seal member 12a, can improve the sealing at the hole of manifold hole 7a periphery significantly.In addition, face seal portion 15 is owing to utilize face seal and the compression load of indeformable ground support assembly when assembling in the attaching face for separating of each manifold hole 7a, 7b, 8a, 8b, 9a, 9b, thereby, can also prevent the distortion of sealing gasket 11.In addition, keep face seal, thereby the precision and the intensity of face seal portion 15 improve all owing to support indeformablely in attaching face for separating.Have again owing to can increase the sub-assembly fastening load in when assembling, thereby can prevent at used thickness thin, the poor sealing of the dividing plate 2 that causes because of elastic recoil when having the metal dividing plate 2 of elastic force.
Therefore, metal dividing plate 2 according to present embodiment, the generation of the contingents such as blast that can prevent the poor sealing, leakage of the attaching face for separating of manifold hole 7a, 7b, 8a, 8b, 9a, 9b, be caused by leakage can obtain the battery behavior of stable fuel cell.
Below, the flowing of fluid of the sub-assembly 1 of present embodiment is described with reference to Fig. 1, Fig. 2, Fig. 3 and Figure 11.
Fluid as generating usefulness uses two kinds of reacting gass.At this, use H as reacting gas
2Gas uses O as oxidant gas
2Gas.In addition, electrode part 4a uses the material that is made of solid macromolecule electrolyte.
Reacting gas H
2Manifold hole 7a, the 7b of the anode-side of flowing through, oxidant gas O
2Manifold hole 8a, the 8b of cathode side flow through.
In addition, flow through manifold hole 9a, 9b of the fluid used of adjustment.
Reacting gas H
2By being divided into the through hole 12c of a plurality of face seal portion 15, the manifold hole 7b that enters into the downstream via the diffuser 10 in the diffuser 10 of upstream side, a plurality of fluid slot 6, downstream is again to outside (battery outside) discharge from the manifold hole 7a of upstream side.
Oxidant gas O
2By being divided into of face seal portion 15 of a plurality of through hole 12c, the diffuser 10 in the diffuser 10 by upstream side, a plurality of fluid slot 6, downstream enters into the manifold hole 8b in downstream and discharges to the outside again from the manifold hole 8a of upstream side.Equally, by being divided into of face seal portion 15 of a plurality of through hole 12c, the diffuser 10 in the diffuser 10 by upstream side, a plurality of fluid slot 6, downstream enters into the manifold hole 9b in downstream and discharges to the outside fluid that adjustment is used again from the manifold hole 9a of upstream side.
As reacting gas H
2The fluid slot 6 of the anode-side that clips electrode part 4a of flowing through, and oxidant gas O
2During the fluid slot 6 of the anode-side that clips electrode part 4a of flowing through, reacting gas H
2Just the gas diffusion layers 3 by anode-side spreads, and oxidant gas O
2Just the gas diffusion layers 3 by cathode side spreads.
In addition, these gas diffusion layers 3 owing to the electrode surface that engages the electrode part 4a that distinguishes antianode side, cathode side on dividing plate 2 and the composition surface of Power Generation Section 4 with certain surface pressing (for example, 10kg/cm
2) push.
As reacting gas H
2During for ion, then the film by solid macromolecule electrolyte and with oxidant gas O
2(also can be air) reacts.
At this moment, though the effect of dividing plate 2 is the films with certain pressure extrusion solid macromolecule electrolyte, form electric current, and seal and do not allow the flow through reacting gas of anode-side directly mix with the reacting gas of the cathode side of flowing through, but in the present embodiment, then be that electrode part 4a, 4a at anode-side, cathode side is with certain surface pressing (for example, 10kg/cm
2) extruding gas diffusion layers 3, keep each attaching face for separating that sufficient sealing force is arranged.Therefore, the sealing leak between the manifold hole of the stack direction of sub-assembly 1 can not take place, reacting gas H
2With oxidant gas O
2Can directly not react yet, can between the electrode part 4a of the electrode part 4a of anode-side and cathode side, produce the voltage of regulation because of leakage.In addition, use dividing plate 2, the Power Generation Section 4 of this structure, formed 30 sub-assemblies 1 that sub-assembly becomes, can obtain good power generation characteristics.
Below, with reference to Fig. 6 and Fig. 7 the another embodiment of the present invention that has formed face seal portion 15 by the bending of attaching face for separating is described.
In this example, be M-TST (the nano metal coating Ti) light sheet material of 0.1mm as the material used thickness of metal separator 2, by stamping-out, compacting, bending, the fixing face seal portion 15 that forms.
Below, each operation is carried out specific description.In addition, in this example, though explanation is the situation that forms face seal portion 15 in the attaching face for separating of manifold hole 7a, to other the attaching face for separating of manifold hole 7b, 8a, 8b, 9a, 9b also with same operation formation face seal portion 15.
Below, blank operation at first is described.
In blank operation, the stamping-out peristome 12i narrower at first than the width of manifold hole 7a, simultaneously, both sides, one side in fluid slot 6 sides of peristome 12i are provided with otch 12j respectively, with between these otch 12j, the 12j as the bending part 12k (Fig. 6 has only represented a side) of the formation of formation that is used for manifold hole 7a and face seal portion 15.
In addition, when forming otch 12j, along one side of peristome 12i and after predetermined distance forms a plurality of hole 12l, transfer to next suppression process in above-mentioned diffuser 10 sides of the metal dividing plate 2 of clamping peristome 12i.
Secondly, suppression process is described.
In suppression process, the above-mentioned bending part 12k of compression moulding by compression moulding, and on bending part 12k a plurality of enhancing 12m of portion of shaping arch.At this moment, with each 12m of enhancing portion of arch during, so that the mode that each 12m of enhancing portion faces between the hole 12l of adjacency is shaped to 180 ° of diffuser side bendings.Subsequently, transfer to the bending operation.
Then, the bending operation is described.
In the bending operation, carry out twice bending.
In bending first time operation, bending part 12k is become U font or コ font along the bending line 16 of the root by the 12m of enhancing portion for 180 ° to diffuser 10 side bendings.
Then, carry out the bending second time.In this operation, will be in bending first time operation the bending part 12k of bending be that bending line is to 180 ° of diffuser side bendings with the center line 17 of a plurality of hole 12l.Thus, above and below form the face seal portion 15 parallel with dividing plate 2.And at this moment, the 12m of enhancing portion becomes reinforcing member 12b.
In addition, enlarge oral area 12i, form manifold hole 7a.And, when like this each hole 12l being carried out bending,, just each hole 12l can be played a role as above-mentioned through hole 12c if be predisposed to the center line of the dogleg section (part of turning back) that is bent into U font or コ font and the center line of each hole 12l is parallel to each other.
At last, fixedly operation is described.
This operation is carried out according to the needs of intensity aspect.Fixedly in the operation, each 12m of enhancing portion that will be formed by compression moulding and the contact point part of each the bending part 12k above or below it are fixed by spot welding etc.Utilize such operation to strengthen the 12k of bending part up and down that face seal is used by a plurality of enhancing 12m of portion, thus, can form and have the face seal portion 15 that allows reacting gas, oxidant gas, adjustment flow to the tunnel-shaped through hole 12c of a plurality of fluid slots 6 through diffuser 10 from manifold hole 7a with fluid.
In addition, in this embodiment, a plurality of fluid slots 6 of dividing plate 2 form when the compression moulding enhancing 12m of portion.In addition, though the formation of a plurality of manifold hole 7a, 7b, 8a, 8b, 9a, 9b can be carried out simultaneously with the blank operation of peristome 12i, also can before forming face seal portion 15 or after forming face seal portion 15, carry out.
Therefore, the metal dividing plate 2 that utilizes present embodiment also can form good face seal in each attaching face for separating at the stack direction of dividing plate 2 and Power Generation Section 4, can prevent its leakage and in the sealing leak of sealing gasket 11.Thus, can improve the battery performance of fuel cell significantly.
Yet in present embodiment and other execution mode, face seal portion 15 is seen from intensity, chemical stability aspect with the metal plate shape with metal dividing plate 2 identical type or similar kind to become to be advisable.For example, though metal dividing plate 2 is by having carried out the Ti clad material that surface conductive handles on the surface and form for having surface conductivity, but because face seal portion 15 need not surface conductivity, thereby also can form by the sheet material of Ti clad material or Ti.In addition,, do compactlyer at thickness direction sub-assembly 1, also can form by the Ti clad material below the 0.2mm, more than the 50 μ m for the thickness of the metal dividing plate 2 of attenuate at stack direction.For guaranteeing runner, though the thickness of metal can attenuate, thickness one is thin, and then the intensity of face seal portion 15 and dividing plate 2 reduces; If thickness surpasses this upper limit, can't reach the densification of stack direction again.Therefore, dividing plate 2 thickness are that M-TST (nano metal coating Ti) the clad material SUS of 0.2mm forms, and each component parts of face seal portion 15 can form with the Ti sheet material of 80 μ m.
Claims (7)
1. metal separator for fuel cell is characterized in that having:
Be used in a plurality of fluid slots of Power Generation Section of the direction of flow fuel cell of operation of fuel cells;
Be arranged on the upstream side and the downstream of described a plurality of fluid slots, make above-mentioned fluid flow into a plurality of manifold holes of a plurality of fluid slots respectively;
When sealing gasket engages with the composition surface of the Power Generation Section of the peripheral part of the electrode part that is arranged on above-mentioned Power Generation Section, cut off the composition surface of above-mentioned a plurality of fluid slot, above-mentioned a plurality of manifold holes and above-mentioned electrode part from the outside;
Be arranged on the face seal portion of above-mentioned attaching face for separating, this face seal portion has by at the smooth sealing surface of locating more in the inner part than above-mentioned sealing gasket to contact with the composition surface face of above-mentioned electrode part and carrying out face seal between to above-mentioned fluid slot and above-mentioned manifold hole;
Be arranged on above-mentioned face seal portion, and be communicated with the tunnel-shaped through hole of above-mentioned manifold hole and above-mentioned fluid slot.
2. metal separator for fuel cell as claimed in claim 1 is characterized in that, after forming above-mentioned face seal portion with the metal separator for fuel cell split in advance, more above-mentioned face seal portion is installed on the above-mentioned attaching face for separating.
3. metal separator for fuel cell as claimed in claim 1 or 2 is characterized in that, by above-mentioned attaching face for separating bending is formed above-mentioned face seal portion.
4. metal separator for fuel cell as claimed in claim 1 or 2 is characterized in that, a plurality of reinforcing members that will be used to strengthen above-mentioned sealing across the interval of regulation are arranged in the above-mentioned through hole.
5. metal separator for fuel cell as claimed in claim 3 is characterized in that, a plurality of reinforcing members that will be used to strengthen above-mentioned sealing across the interval of regulation are arranged in the above-mentioned through hole.
6. metal separator for fuel cell as claimed in claim 4 is characterized in that a plurality of reinforcing members form by bending, thereby makes the flow of the above-mentioned fluid that flows to above-mentioned a plurality of fluid slots respectively reach even.
7. metal separator for fuel cell as claimed in claim 5 is characterized in that a plurality of reinforcing members form by bending, thereby makes the flow of the above-mentioned fluid that flows to above-mentioned a plurality of fluid slots respectively reach even.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008072203 | 2008-03-19 | ||
| JP2008072203 | 2008-03-19 |
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| Publication Number | Publication Date |
|---|---|
| CN101540404A true CN101540404A (en) | 2009-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910128564A Pending CN101540404A (en) | 2008-03-19 | 2009-03-18 | Metal separator for fuel cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687322A (en) * | 2009-12-01 | 2012-09-19 | 丰田自动车株式会社 | Fuel cell |
| CN105609806A (en) * | 2014-11-13 | 2016-05-25 | 丰田自动车株式会社 | Fuel cell separator, fuel cell current collector plate, fuel cell and fuel cell stack |
-
2009
- 2009-03-18 CN CN200910128564A patent/CN101540404A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687322A (en) * | 2009-12-01 | 2012-09-19 | 丰田自动车株式会社 | Fuel cell |
| CN102687322B (en) * | 2009-12-01 | 2014-10-29 | 丰田自动车株式会社 | Fuel cell |
| CN105609806A (en) * | 2014-11-13 | 2016-05-25 | 丰田自动车株式会社 | Fuel cell separator, fuel cell current collector plate, fuel cell and fuel cell stack |
| CN105609806B (en) * | 2014-11-13 | 2018-04-27 | 丰田自动车株式会社 | Separator and collector plate, the fuel cell and fuel cell unit of fuel cell |
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