CN102122722B - Solid oxide fuel cell stack - Google Patents
Solid oxide fuel cell stack Download PDFInfo
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- CN102122722B CN102122722B CN201110024540.XA CN201110024540A CN102122722B CN 102122722 B CN102122722 B CN 102122722B CN 201110024540 A CN201110024540 A CN 201110024540A CN 102122722 B CN102122722 B CN 102122722B
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- 239000000446 fuel Substances 0.000 title claims abstract description 43
- 239000007787 solid Substances 0.000 title abstract description 15
- 239000002737 fuel gas Substances 0.000 claims abstract description 99
- 239000007789 gas Substances 0.000 claims abstract description 90
- 230000001590 oxidative effect Effects 0.000 claims abstract description 86
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 239000011159 matrix material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 description 28
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 26
- 230000008569 process Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 15
- 239000006260 foam Substances 0.000 description 13
- 229910052759 nickel Inorganic materials 0.000 description 13
- 239000007800 oxidant agent Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 239000004047 hole gas Substances 0.000 description 6
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- 238000007781 pre-processing Methods 0.000 description 6
- 239000007769 metal material Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000003698 laser cutting Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 210000004894 snout Anatomy 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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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
-
- 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
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- Fuel Cell (AREA)
Abstract
The invention provides a solid oxide fuel cell stack which comprises an upper current collector, a lower current collector and a stacked structure accommodated between the upper current collector and the lower current collector, wherein the stacked structure comprises at least two connecting parts and a cell piece arranged between the two adjacent connecting parts, each connecting part comprises the anode side and the cathode side, an oxidizing gas sealing part is arranged on the anode side of each connecting part, and a fuel gas sealing part is arranged on the cathode side of each connecting part; and a closed oxidizing gas inlet channel, a closed fuel gas inlet channel, a closed fuel gas outlet channel and an open oxidizing gas outlet channel are arranged on the stacked structure. Compared with the prior art, as an oxidizing gas outlet is open, the internal gas pressure difference at the cathode sides of the connecting parts is smaller, the flow is more smooth, the problem of mutual gas moving between fuel gas and oxidizing gas can be effectively solved, the sealing reliability of the stack can be improved, and the finished product rate of the stack and the performance operation stability can be further improved.
Description
Technical field
The present invention relates to Solid Oxide Fuel Cell, be specifically related to a kind of solid-oxide fuel cell stack.
Background technology
Solid Oxide Fuel Cell (Solid Oxide Fuel Cell, be called for short SOFC) belong to third generation fuel cell, be a kind ofly under middle high temperature, will to be stored in all solid state chemical generated device that chemical energy in fuel and oxidant is efficient, change into environmental friendliness electric energy.Solid Oxide Fuel Cell is roughly divided into two kinds: a kind of is column type, and wherein electrode and solid electrolyte all cover around the face of cylinder, and another kind is plane, and wherein solid electrolyte and electrode are all made flat shape.
Compare with column type Solid Oxide Fuel Cell, plane Solid Oxide Fuel Cell has higher power density in unit volume, is more applicable at mobile device and uses on as automobile, therefore has prospect of the application more widely.The core component of plane solid oxide fuel battery system is battery pile, and battery pile is the stacked structure being formed by a plurality of Solid Oxide Fuel Cell unit.
The stability of battery pile is the key that determines that can whole solid oxide fuel battery system normally move.The factor that affects battery pile stability comprises the catchment effect of the contact interface between monocell life-span, battery pile sealing, battery and connector, and wherein improving battery pile sealing is one of study hotspot of current Solid Oxide Fuel Cell.
In prior art, the hermetically-sealed construction of flat-plate-type solid-oxide fuel battery mainly contains two kinds, and the first hermetically-sealed construction is that fuel and oxidant gas all seal, thus the enclosed construction of the intersection of formation or convection current; The second hermetically-sealed construction is that oxidant gas is completely unlimited, only fuel gas is sealed.
The subject matter of the first hermetically-sealed construction is in the manufacture process of battery pile, because fuel gas and oxidant gas are all in the environment of sealing, pressure reduction is larger, therefore fuel gas and oxidant gas easily produce the problem of collaborating, thereby cause more battery pile waste product, improved the manufacturing cost of battery pile.Although the second hermetically-sealed construction can overcome the possibility that fuel gas and oxidant gas high temperature are collaborated mutually, but in order to ensure oxidant gaseous state, enter the negative electrode of battery, an oxidant air cavity need to be additionally provided, oxidant gas chamber easily and battery pile be short-circuited, cause the battery pile can not stable operation.
Summary of the invention
The technical problem that the present invention solves is, a kind of solid-oxide fuel cell stack is provided, and compared with prior art, this battery pile not only avoids fuel gas and oxidant gas to collaborate, and effectively prevent that battery from producing the problem of short circuit, thereby guarantee the operation stability of battery pile.
In order to solve above technical problem, the invention provides a kind of solid-oxide fuel cell stack, comprising:
Upper collector plate, lower header plate and be contained in the stacked structure between described upper collector plate and lower header plate;
Described stacked structure comprises at least two connectors, is arranged on the cell piece between two adjacent described connectors, described connector has anode-side and cathode side, anode-side at described connector is provided with oxidizing gas seal, at the cathode side of described connector, is provided with fuel gas seal;
On described stacked structure, be provided with airtight oxidizing gas inlet channel, airtight fuel gas inlet channel and airtight fuel gas outlet passageway, and unlimited oxidizing gas outlet passageway.
Preferably, the both sides of described connector are provided with the salient point of dot matrix arrangement and are arranged on described salient point sealing strip around.
Preferably, the sealing strip of described connector cathode side has peristome, and described peristome and described fuel gas seal form described unlimited oxidizing gas outlet passageway.
Preferably, described airtight oxidizing gas inlet channel by being arranged on oxidizing gas air admission hole on described oxidizing gas seal, be arranged on oxidizing gas air admission hole on described cell piece, be arranged on oxidizing gas air admission hole on described connector and be communicated with and form.
Preferably, described airtight fuel gas runner by being arranged on fuel gas air admission hole on described fuel gas seal, be arranged on fuel gas air admission hole on described cell piece, be arranged on fuel gas air admission hole on described connector and be communicated with and form.
Preferably, described fuel gas outlet passageway by being arranged on fuel gas venthole on described oxidizing gas seal, be arranged on fuel gas venthole on described cell piece, be arranged on fuel gas venthole on described connector and be communicated with and form.
Preferably, the height that is the salient point of dot matrix arrangement described in is 0.3～1.0mm.
Preferably, the ratio that effective contact area that the salient point that on described connector, dot matrix is arranged contacts with the element of this side of connector accounts for described connector lateralarea is 10%～50%.
Preferably, the width of described sealing strip is 2mm～15mm.
Preferably, described upper collector plate, stacked structure and lower header plate are connected by bolt assembly.
Of the present inventionly provide a kind of solid-oxide fuel cell stack, this battery pile comprises airtight oxidizing gas inlet channel, airtight fuel gas inlet channel, airtight fuel gas outlet passageway and unlimited oxidizing gas outlet passageway.The invention provides the oxidizing gas import sealing in battery pile, outlet is opened wide.Importing and exporting sealing completely with oxidizing gas of the prior art compares, because oxidizing gas outlet is opened wide, internal gas pressure reduction is less, mobile more smooth and easy, has effectively solved the possibility that fuel and oxidizing gas are collaborated mutually, has further improved stability and the output performance of pile operation.Compare with the structure of the complete open type of oxidizing gas of the prior art, the present invention is without additional designs oxidizing gas snout cavity, thereby can avoid causing the problems such as pile short circuit.
Accompanying drawing explanation
Fig. 1 is the first execution mode structural representation after solid-oxide fuel cell stack assembling provided by the invention;
Fig. 2 is the second execution mode structural representation after solid-oxide fuel cell stack assembling provided by the invention;
Fig. 3 is the fractionation schematic diagram of the solid-oxide fuel cell stack shown in Fig. 1;
Fig. 4 is the connector cathode side schematic diagram in the solid-oxide fuel cell stack shown in Fig. 3;
Fig. 5 is the fuel gas seal schematic diagram of the connector cathode side in Fig. 3;
Fig. 6 is the connector anode-side schematic diagram in Fig. 3;
Fig. 7 is the oxidizing gas seal schematic diagram of connector anode-side in Fig. 3;
Fig. 8 is nickel foam schematic diagram;
Fig. 9 is monocell anode surface schematic diagram;
Figure 10 is the monocell cathode plane schematic diagram shown in Fig. 9;
Figure 11 is the I-V curve of the battery pile test in the embodiment of the present invention 2;
Figure 12 is the attenuation curve figure of the battery pile in the embodiment of the present invention 3;
Figure 13 is monocell attenuation curve figure in the battery pile in the embodiment of the present invention 3.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, rather than limiting to the claimed invention.
Refer to Fig. 1, for a kind of execution mode schematic diagram of solid-oxide fuel cell stack provided by the invention, comprise collector plate 1 and lower header plate 2 and be contained in the stacked structure 3 between described upper collector plate and lower header plate, upper collector plate 1 and lower header plate 2 pressurize fixing by screw arbor assembly, screw arbor assembly is preferably the screw arbor assembly of metal material.In present embodiment, screw arbor assembly 4 comprises screw rod 41 and two bolts 42, on four limits of upper collector plate, preprocessing has the screw rod of positioning screw to support 1a, on four limits of lower header plate also preprocessing have with described on the screw rod of collector plate support screw rod corresponding to 1a position and support.By screw rod be positioned at screw rod support 1a upper after, from upper collector plate outside and lower header plate outside, in two outer ends of screw rod, screw in bolts respectively, then by screwing bolt, upper collector plate, stacked structure, lower header plate are pressurizeed and are fixed.It is fixing that the present invention adopts screw arbor assembly that upper collector plate, lower header plate and stacked structure are pressurizeed at normal temperatures, and this kind of structure is convenient to dismounting, is conducive to mass assembling and produces.
Referring to Fig. 2, is the schematic diagram of solid-oxide fuel cell stack the second execution mode provided by the invention.Be with the difference of the first execution mode, the battery pile of present embodiment has been carried out further improvement to the fixedly pressuring method of upper collector plate, lower header plate and stacked structure.
In present embodiment, screw arbor assembly comprises screw rod 42, is connected to the first screw rod fixture 41 and the second screw rod fixture 42 at described screw rod two ends, described the first screw rod fixture 41 and the second screw rod fixture 42 are arranged on the inner side of collector plate and lower header plate, described upper collector plate 1, stacked structure 3, lower header plate 3 are pressurizeed fixing.Described two screw rod fixtures 41,42 have identical structure, below take the first screw rod fixture 41 and describe as example.The first screw rod fixture has a screw rod end 41a and the screw thread nose end 41b corresponding with described screw rod end, and the two ends of described screw rod 42 coordinate with the screw thread nose end of described two screw rod fixtures respectively.The screw rod end of described two screw rod fixtures is fixed from the interior sideway swivel of upper collector plate and lower header plate respectively; In collector plate and dirty version, be processed with respectively the screwed hole matching with the screw rod end of described two screw rod fixtures on described, by rotating two screw rod fixtures and screw rod, can realize the pressurization of upper collector plate, lower header plate and stacked structure is fixed like this.Compare with the first execution mode, the advantage of the second execution mode is that the outside of upper collector plate and lower header plate does not have bolt to protrude, and therefore more easily realizes the serial or parallel connection of battery pile.
In the second execution mode, screw arbor assembly can be metal material, can be also non-metallic material, as engineering plastics or composite material.When screw arbor assembly is metal material, battery pile is carried out, before high temperature test, need to laying down screw arbor assembly; When screw arbor assembly is non-metallic material during as composite material, before high temperature test, do not need to lay down screw arbor assembly, therefore more convenient to operate.Refer to Fig. 3, fractionation schematic diagram for the solid-oxide fuel cell stack described in Fig. 1, described stacked structure comprises a plurality of connectors 11, three connectors have been shown in Fig. 3, the effect of connector is for separating fuel gas and oxidizing gas, fuel gas is hydrogen in the present embodiment, and oxidizing gas is air.
The material of connector can be made by stainless steel well known to those skilled in the art, and stainless object lesson can be the connector of the materials such as Fe-16Cr, Fe-22Cr, and concrete model is as SUS430, but is not limited to this.For the quantity of connector, at least should be two, can be also two or more, can decide according to the quantity of the monocell of design the quantity of connector.Conventionally, the quantity of connector is greater than 1 than the quantity of monocell, and monocell is arranged between two adjacent connectors; Top and the bottom of stacked structure are connector, and top connector contacts with upper collector plate, and bottom connector contacts with next part fluid layer.The thickness of described connector is preferably 0.8mm～4mm, more preferably 1.0mm～3mm, more preferably 1.2mm～2.8mm, more preferably 1.5mm～2.5mm.
Please continue referring to Fig. 3, between two adjacent connectors, be provided with monocell 12; Connector 11 has two first type surfaces, for convenience of description, connector, in the face of a first type surface of monocell cathode side is called the cathode side of connector, is called another first type surface corresponding with cathode side to the anode-side of connector; Anode-side at connector is provided with oxidizing gas seal 13, at the cathode side of connector, is provided with fuel gas seal 14.
Described oxidizing gas seal and fuel gas seal are same material, have different structure (describing in detail below), can use seal glass well known to those skilled in the art, if general formula conventional in this area is A
2o
3-SiO
2the seal glass of-BO system, the A in general formula represents Al, B, La or Te element, the B in general formula represents Mg, Zn, Sr, Ca or F element.
On the anode-side of connector and two first type surfaces of cathode side, all processed the salient point that dot matrix is arranged, the cross sectional shape of salient point can be for cylindrical, also can, for triangle, Long Circle, rectangle and polygon arbitrarily, this present invention be not particularly limited.
The adding of screw arbor assembly that act on of above-mentioned connector salient point, depresses with the element such as cell cathode, nickel foam, upper collector plate/lower header plate and contacts, and produces afflux effect.The salient point that dot matrix is arranged can adopt the method for etching well known to those skilled in the art or punching press to realize, and the hole between salient point is as the passage of fuel gas or oxidizing gas, and the height of salient point is preferably 0.3～1.0mm, more preferably 0.4～0.9mm.Salient point when pressurization and cell cathode, nickel foam, on the effective area that contacts of the element such as collector plate/lower header plate account for 10%～50% of connector area, be preferably 15%～45%.It is inner that the bump structure of the present invention's design is easy to enter cell cathode afflux layer, thereby increased catchment effect, improves pile output performance.
The surrounding of the salient point of arranging at the dot matrix of two first type surfaces of connector is processed with sealing strip, and the effect of sealing strip is to contact the object that reaches sealing with seal.In the present invention, the sealing strip of the anode-side of connector has different structures from the sealing strip of cathode side, below describes in detail.
As shown in Figure 4, be the structural representation of connector cathode side, on the cathode side of connector, adopt etching method to process the salient point 11a that dot matrix is arranged, the salient point of arranging at dot matrix preprocessing around goes out cathode side sealing strip 101; Described cathode side sealing strip 101 comprises the first 101a corresponding with a side of connector, the second portion 101b and the third part 101c that are connected with described first two ends, the corresponding part of the 101a of Yu first is opened wide, have a peristome, negative electrode sealing strip is a unlimited sealing strip.The height of salient point and sealing strip preferably maintains an equal level, and can salient point effectively be contacted fully with other element maintenance reaching in better sealing effectiveness situation like this.
It between the 101a of first of salient point and described sealing strip, is ventilation groove 111, width and the air vent hole diameter ratio of ventilation groove are preferably 1/5～1, the degree of depth of ventilation groove is corresponding with bump height, be preferably 0.3～1.0mm, the effect of ventilation groove is as gas overall channel, to the air between salient point, feeds gas; Described air vent hole refers to the air vent hole processing from opposite side sealing strip, at cathode side, is oxidizing gas air vent hole.
On described second portion 101b and third part 101c, be reserved with respectively the position for fabricate fuel gas air admission hole and fuel gas venthole, like this, can on second portion 101b, process fuel gas air admission hole 101d, on third part 101b, process fuel gas venthole 101e.Please be simultaneously referring to Fig. 5, schematic diagram for fuel gas seal 14, on fuel gas seal, be processed with respectively fuel gas air admission hole 14a and the fuel gas venthole 14b corresponding with the position of fuel gas air admission hole 101d on described connector and fuel gas venthole 101e, after like this fuel gas seal being fitted on cathode side sealing strip 101, fuel gas can be sealed in beyond cathode side, prevent that fuel gas from sneaking into this region.In addition, because cathode side sealing strip 101 opens wide, therefore fit after fuel gas seal 101, this unlimited part can be not sealed yet, can be used as like this exit passageway of unlimited oxidizing gas.
As shown in Figure 6, structural representation for connector anode-side, the same with cathode side, adopt the method for etching or punching press to process the salient point 11b that dot matrix is arranged, the salient point of arranging at dot matrix preprocessing around goes out anode-side sealing strip 102, anode-side sealing strip 102 comprises the four part 102a corresponding with the 101a of first, the 5th part 102b and the 6th part 102c that are connected with described the 4th part two ends, the 7th part 102d that connects described the 5th part 102b and the 6th part 102c, different from negative electrode sealing strip, anode seal limit is the sealing strip of a sealing, the height of salient point and sealing strip maintains an equal level.
Between the 5th part 102b of salient point and described sealing strip and the 6th part, be ventilation groove 112, this ventilation groove is identical with the ventilation groove structure of cathode side, does not repeat them here.The effect of ventilation groove 112 is as fuel gas overall channel, and the fuel gas that fuel gas air admission hole is entered feeds in the gap between salient point, or the fuel gas in the gap between salient point is sent to fuel gas venthole.
On described the 4th part 102a, be reserved with for processing the position of oxidizing gas air admission hole, in this position, can process oxidizing gas air admission hole 102e; Please be simultaneously referring to Fig. 7, schematic diagram for oxidizing gas seal 13, on oxidizing gas seal, be processed with oxidizing gas and enter hole 13a, after this oxidizing gas seal is fitted on anode-side sealing strip, oxidizing gas can be sealed in beyond anode-side, prevent that oxidizing gas from sneaking into this region.In addition, fuel gas can through the hole between the salient point in this region, then can be discharged from fuel gas venthole 101e from fuel gas air admission hole 101d enters, and fuel gas channel all seals.
Width for above-mentioned anode-side sealing strip or cathode side sealing strip, is preferably 2mm～15mm, more preferably 3mm～10mm, more preferably 4mm～9mm.
In the stacked structure of present embodiment, the salient point on the cathode side of the top connector of stacked structure contacts with upper collector plate, between the sealing strip of this cathode side and upper collector plate, by fuel gas seal, carries out sealing-in; Salient point in the anode-side of the bottom connector of stacked structure contacts with lower header plate, between the sealing strip of this anode-side and lower header plate, by oxidizing gas seal, carries out sealing-in.
According to the present invention, in stacked structure, the cathode side of connector carries out sealing-in by the negative electrode of fuel gas seal and battery, the anode-side of connector is carried out sealing-in by the anode of oxidizing gas seal and battery, between the anode-side of connector and the anode of battery, be also provided with nickel foam, as shown in Figure 8, be the structural representation of nickel foam, in nickel foam, also need to process oxidizing gas air inlet gap.
In addition, in order to assemble the stacked structure of said structure, need on monocell, also process the hole corresponding with oxidizing gas air admission hole, fuel gas air admission hole, fuel gas venthole on connector, to form gas passage.For monocell, can use anode-supported flat-plate solid-oxide individual fuel cell, also can use dielectric support solid oxide fuel monocell, the shape of monocell is not limit, and is preferably square.
Solid-oxide fuel cell stack provided by the invention can be prepared as follows:
On monocell, preferably using the mode of laser cutting to process 3 holes, respectively as oxidizing gas air admission hole, fuel gas air admission hole and fuel gas venthole, as shown in Figure 9, is monocell anode surface schematic diagram, and Figure 10 is monocell cathode plane schematic diagram;
Get the connector of the good salient point of etching or punching press, on the position corresponding with 3 holes of described monocell, also process three holes, respectively as oxidizing gas air admission hole, fuel gas air admission hole and fuel gas venthole;
Get seal glass and process a hole on the corresponding position of the oxidizing gas air admission hole with described connector, then as oxidizing gas seal; Separately get seal glass and process two holes on the fuel gas air admission hole with described connector and the corresponding position of fuel gas venthole, then as fuel gas seal;
Get nickel foam and process gap on the corresponding position of the oxidizing gas air admission hole with described connector, as oxidizing gas inlet channel.
Get the above-mentioned connector processing, monocell, oxidizing gas seal, fuel gas seal, nickel foam, upper collector plate, lower header plate and bolt and be assembled into the solid-oxide fuel cell stack shown in Fig. 1, single cell units number can need to be selected according to design, and to this present invention, there is no particular restriction.Then, can to stack performance, test according to method well known to those skilled in the art.
With specific embodiment, effect of the present invention is described below, but protection scope of the present invention is not limited by the following examples.
Embodiment 1:
Prepare following element standby:
Monocell: the anode-supported monocell sheet that preparation specification is 10cm * 10cm, anode is, negative electrode is to adopt the method for laser cutting on an edge part of monocell, to process oxidizing gas air admission hole, on two the perpendicular edge parts with described oxidizing gas air admission hole place edge part, process fuel gas air admission hole and fuel gas venthole;
Connector: material is SUS430, thickness is 2.5mm, in the anode-side of this connector and cathode side, etches the boss point that dot matrix is arranged (dot matrix arrangement), the height of the boss point of two sides is 0.5mm; Shown in Fig. 4 and Fig. 6, process respectively anode-side sealing strip and cathode side sealing strip that width is 3.5mm, wherein cathode side sealing strip has an opened portion.
Adopt the mode of laser cutting to process respectively fuel gas air admission hole, fuel gas venthole, oxidizing gas air admission hole in described fuel gas air admission hole position, fuel gas venthole position, oxidizing gas air admission hole position;
Oxidizing gas seal: get Al
2o
3-SiO
2the concrete model of-MgO(seal glass or composition) seal glass processes oxidizing gas air admission hole on the position corresponding with oxidizing gas air admission hole on described connector;
Fuel gas seal: get Al
2o
3-SiO
2the concrete model of-MgO(seal glass or composition) seal glass processes respectively fuel gas air admission hole and fuel gas venthole on position empty with fuel gas air inlet on connector, that fuel gas venthole is corresponding;
Nickel foam: process oxidizing gas air admission hole and fuel gas runner hole;
Upper collector plate, employing SUS430 is material, the method for machining on three limits of upper collector plate respectively preprocessing go out the screw arbor assembly for pressurizeing;
Lower header plate, employing SUS430 is material, on three limits of lower header plate, preprocessing goes out the screw arbor assembly for pressurizeing respectively.
Get collector plate, lower header plate and 5 connectors, 5 oxidizing gas seals, 5 fuel gas seals, 4 monocells, 4 nickel foam and according to the der group of upper collector plate/fuel gas seal/(connector/oxidizing gas seal (nickel foam)/monocell) * 4/ connector/oxidizing gas seal/lower header plate, dress up the battery pile assembly of Unit 4, then get bolt assembly and will fix collector plate and lower header plate.
Battery pile assembly after assembling was warming up to 850 ℃ from room temperature through 12 hours, is incubated 0～200kg test performance under different condition that pressurizes after 4 hours, the I-V curve obtaining as shown in figure 11.
In Figure 11: when battery pile prepared by the present embodiment is at 850 ℃, 200kg pressure and H
2: Air=8:19sccmcm
-2under condition, after reductase 12 hour, the maximum power when recording electric current and being 32A is 79.6W, and corresponding maximum power density is 0.306Wcm
-2.Work as H
2: Air=8:19sccmcm
-2time, the maximum power when recording electric current and being 39A is 100.5W, corresponding maximum power density is 0.385Wcm
-2; The maximum power density that obtains battery pile prepared by the present embodiment according to the curve in Figure 11 is 0.427Wcm
-2, the open circuit voltage>=4.1V of battery pile, battery pile prepared by the present embodiment has higher power density.
Keep H
2: Air=12:31sccmcm
-2gas flow is constant, and stack temperature is down to 800 ℃ by 850oC through 50min, is incubated after 1.5 hours, records maximum power 89W when electric current is 38A, and corresponding maximum power density is 0.342W cm
-2.
Get collector plate, lower header plate and 6 connectors, 6 oxidizing gas seals, 6 fuel gas seals, 5 monocells, 5 nickel foam and according to the der group of upper collector plate/fuel gas seal/(connector/oxidizing gas seal (nickel foam)/monocell) * 5/ connector/oxidizing gas seal/lower header plate, dress up the battery pile assembly of Unit 5, then get bolt assembly and will fix collector plate and lower header plate.
Battery pile assembly after assembling was warming up to 850 ℃ from room temperature through 12 hours, is incubated 0～400kg test I-V curve that pressurizes after 4 hours.After being completed, I-V curve at 800 ℃, it is carried out under 8A condition attenuation test, result as shown in Figure 12 and Figure 13, Figure 12 is battery pile overall attenuation curve, Figure 13 is the attenuation curve of the monocell in battery pile, from the result of Figure 12 and Figure 13, can find out, the not decay after the test of 75h of this battery pile and cell heap unit thereof, stops after constant-current discharge, the open circuit voltage of battery pile has reached 5.7V, and the open circuit voltage of cell reaches and all surpassed 1.1V.
Above Solid Oxide Fuel Cell provided by the present invention is described in detail.Applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection range of the claims in the present invention.
Claims (9)
1. a solid-oxide fuel cell stack, is characterized in that, comprising:
Upper collector plate, lower header plate and be contained in the stacked structure between described upper collector plate and lower header plate;
Described stacked structure comprises at least two connectors, is arranged on the cell piece between two adjacent described connectors, described connector has anode-side and cathode side, anode-side at described connector is provided with oxidizing gas seal, at the cathode side of described connector, is provided with fuel gas seal;
On described stacked structure, be provided with airtight oxidizing gas inlet channel, airtight fuel gas inlet channel and airtight fuel gas outlet passageway, and unlimited oxidizing gas outlet passageway;
The sealing strip of described connector cathode side has peristome, and described peristome and described fuel gas seal form described unlimited oxidizing gas outlet passageway;
On described fuel gas seal, be processed with respectively fuel gas air admission hole and the fuel gas venthole corresponding with the position of fuel gas air admission hole on described connector and fuel gas venthole;
On described oxidizing gas seal, be processed with oxidizing gas and enter hole.
2. solid-oxide fuel cell stack according to claim 1, is characterized in that, the both sides of described connector are provided with the salient point of dot matrix arrangement and are arranged on described salient point sealing strip around.
3. solid-oxide fuel cell stack according to claim 1, it is characterized in that, described airtight oxidizing gas inlet channel by being arranged on oxidizing gas air admission hole on described oxidizing gas seal, be arranged on oxidizing gas air admission hole on described cell piece, be arranged on oxidizing gas air admission hole on described connector and be communicated with and form.
4. solid-oxide fuel cell stack according to claim 1, it is characterized in that, described airtight fuel gas inlet channel by being arranged on fuel gas air admission hole on described fuel gas seal, be arranged on fuel gas air admission hole on described cell piece, be arranged on fuel gas air admission hole on described connector and be communicated with and form.
5. solid-oxide fuel cell stack according to claim 1, it is characterized in that, described fuel gas outlet passageway by being arranged on fuel gas venthole on described oxidizing gas seal, be arranged on fuel gas venthole on described cell piece, be arranged on fuel gas venthole on described connector and be communicated with and form.
6. solid-oxide fuel cell stack according to claim 2, is characterized in that, described in be the salient point that dot matrix arranges height be 0.3～1.0mm.
7. solid-oxide fuel cell stack according to claim 6, is characterized in that, the ratio that effective contact area that the salient point that on described connector, dot matrix is arranged contacts with the element of this side of connector accounts for described connector lateralarea is 10%～50%.
8. solid-oxide fuel cell stack according to claim 6, is characterized in that, the width of described sealing strip is 2mm～15mm.
9. solid-oxide fuel cell stack according to claim 8, is characterized in that, described upper collector plate, stacked structure and lower header plate are connected by bolt assembly.
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| CN201110024540.XA CN102122722B (en) | 2011-01-21 | 2011-01-21 | Solid oxide fuel cell stack |
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| CN201110024540.XA CN102122722B (en) | 2011-01-21 | 2011-01-21 | Solid oxide fuel cell stack |
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| CN102122722B true CN102122722B (en) | 2014-04-09 |
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| CN103296301B (en) * | 2012-03-02 | 2015-10-07 | 中国科学院宁波材料技术与工程研究所 | A kind of anode-supported flat solid oxide fuel cell is without piezoelectric pile |
| CN103117360B (en) * | 2013-01-21 | 2015-06-24 | 西安理工大学 | Preparation method of organic nickel oxide resistance storage film and electrical property test method thereof |
| CN105405993B (en) * | 2015-11-05 | 2018-09-07 | 中国科学院宁波材料技术与工程研究所 | A kind of the sodium nickel-based battery energy-storage module and sodium nickel-based battery group of flat structure |
| CN106784957B (en) * | 2016-12-23 | 2019-04-30 | 宁波索福人能源技术有限公司 | Conductive structure is sealed between a kind of fuel cell pack and fixed block |
| CN106654334B (en) * | 2016-12-23 | 2019-04-30 | 宁波索福人能源技术有限公司 | A kind of solid-oxide fuel cell stack array and its electricity generation system |
| CN107248586B (en) * | 2017-06-27 | 2019-07-19 | 上海中弗新能源科技有限公司 | A kind of solid oxide fuel cell pile |
| AU2018307740B2 (en) * | 2017-07-24 | 2024-03-28 | Nuvera Fuel Cells, LLC. | Systems and methods of fuel cell stack compression |
| CN108365242A (en) * | 2018-02-09 | 2018-08-03 | 东莞深圳清华大学研究院创新中心 | A kind of solid oxide fuel cell |
| CN108365243B (en) * | 2018-04-27 | 2024-04-30 | 广东清大创新研究院有限公司 | Solid oxide fuel cell stack |
| CN109830732B (en) * | 2019-01-25 | 2024-08-13 | 哈尔滨工业大学（深圳） | Pile structure of asymmetric flat plate structure high-temperature solid fuel cell |
| CN112886043A (en) * | 2019-11-29 | 2021-06-01 | 国家能源投资集团有限责任公司 | Cell stack end plate, fuel cell stack and fuel cell stack tower |
| CN113241456B (en) * | 2021-04-27 | 2022-05-24 | 国家电投集团氢能科技发展有限公司 | Fuel cell |
| CN113148382A (en) * | 2021-05-19 | 2021-07-23 | 安徽医科大学 | Portable three-dimensional storage frame of brain slice |
| CN116885234B (en) * | 2023-07-27 | 2024-05-28 | 广东佛燃科技有限公司 | Air flow distribution base suitable for multiple SOFC (solid oxide Fuel cell) pile modules |
| CN117613308B (en) * | 2024-01-22 | 2024-05-24 | 中国科学院宁波材料技术与工程研究所 | Public channel drainage structure of fuel cell and fuel cell |
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