CN100505399C - Semi passive type fuel cell system - Google Patents

Semi passive type fuel cell system Download PDF

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Publication number
CN100505399C
CN100505399C CNB2006101528212A CN200610152821A CN100505399C CN 100505399 C CN100505399 C CN 100505399C CN B2006101528212 A CNB2006101528212 A CN B2006101528212A CN 200610152821 A CN200610152821 A CN 200610152821A CN 100505399 C CN100505399 C CN 100505399C
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China
Prior art keywords
air
pipeline
fuel cell
cell system
battery pile
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CNB2006101528212A
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Chinese (zh)
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CN1953254A (en
Inventor
罗永承
徐晙源
申政燮
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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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
    • H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
    • 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
    • H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
    • 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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • 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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • 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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
    • 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
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
    • H01M8/0687—Reactant purification by the use of membranes or filters
    • 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M2008/1095—Fuel cells with polymeric electrolytes
    • 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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1009—Fuel cells with solid electrolytes with one of the reactants being liquid, solid or liquid-charged
    • H01M8/1011—Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC]
    • 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

Abstract

A semi-passive fuel cell system is provided. A stack in which a plurality of unit cells are laterally stacked with one another is provided. Each unit cell includes a membrane-electrode assembly and bipolar plates located on both sides of the membrane-electrode assembly. The membrane-electrode assembly includes an electrolyte membrane, a cathode electrode, and an anode electrode. The cathode and anode electrodes, respectively, are formed on each side of the electrolyte membrane. Also provided are a means for supplying fuel and a means for supplying air. Each of the bipolar plates has air paths formed on a surface facing the cathode electrode and extending from an upper end to a lower end of the bipolar plate. The air supply means includes ducts which are respectively installed on an upper end and a lower end of the stack, and includes a means for blowing air through the ducts.

Description

Semi passive type fuel cell system
Mutual reference between the related application
The application advocates priority according to following patent application: the korean patent application No.10-2005-0098952 that proposes on October 20th, 2005, the korean patent application No.10-2005-0098953 that proposes on October 20th, 2005, the korean patent application No.10-2005-0098954 that proposes on October 20th, 2005, the korean patent application No.10-2005-0099281 that proposes on October 20th, 2005, the korean patent application No.10-2005-0099280 that proposes on October 20th, 2005, and the korean patent application No.10-2005-0099279 that proposes on October 20th, 2005, All Files all proposes in Korea S Department of Intellectual Property, and above-mentioned application all the elements are herein incorporated as reference.
Technical field
The present invention relates to a kind of semi passive type fuel cell system, more specifically, relate to a kind of semi passive type fuel cell system that makes even air ground supply with the air duct that in the bipolar plates of fuel cell pack, forms.
Background technology
As everyone knows, fuel cell is a kind of electricity generation system, and it will be included in such as the chemical reaction that hydrogen and oxidant reaction produced in the hydrocarbon fuel such as methyl alcohol, ethanol, natural gas can directly be transformed into electric energy.
Fuel cell system can be divided into polymer dielectric film fuel cell (being designated hereinafter simply as " PEMFC ") system and direct methanol fuel cell (being designated hereinafter simply as " DMFC ") system substantially.
In general, the PEMFC system comprises and is used for producing the battery pile of electric energy and producing the reformer of hydrogen by fuel is reformed by the reaction between hydrogen and the oxygen.Though the PEMFC system has big energy density and high energy output, but hydrogen must carefully be handled, and this PEMFC need be equipped with extra such as equipment such as reformers, with to reforming such as fuel such as methyl alcohol, ethanol and natural gases, thereby produces the hydrogen of the gas that acts as a fuel.
In this DMFC system, the methyl alcohol that acts as a fuel and be supplied directly onto battery pile as the oxygen of oxidant produces electric energy by electrochemical reaction.This DMFC system has high-energy-density and high power density.Simultaneously, owing to directly use, thereby do not need extra equipment such as reformer, and be easy to storage and fueling such as liquid fuels such as methyl alcohol.
In this DMFC system, air is supplied with battery pile by using by force such as air supply arrangements such as air compressor, air pumps.Because this DMFC system can carry, thereby people are considering to be applied to portable terminals such as notebook computer, mobile phone.But the air supply arrangement that adopts in this DMFC system can produce the noise of higher level, thereby may make troubles to the user.Consider this problem, this DMFC system be developed to by free convection to battery pile air fed passive-type DMFC system or by air-blast devices such as air blasts to the air fed semi passive type DMFC of battery pile system.
In passive-type DMFC system, because air is supplied with by free convection, air can not supply to each negative electrode sufficiently.Therefore, in this passive-type DMFC system, element cell is not piled up, but arranges in one plane, thereby the shared area of battery pile can increase.
On the other hand, in semi passive type DMFC system, owing to adopted such as air-blast devices such as air blasts, compare with passive-type DMFC system, the air capacity of its supply increases to some extent.Thereby, in this semi passive type DMFC system, element cell can be piled up the formation battery pile.About this situation, TOHKEMY 2001-6717 discloses a kind of fuel cell body with the pair of electrodes that comprises fuel electrode and oxidant electrode.As shown in figure 39, the oxygen that in electrode reaction, consumes for the oxidant electrode of postcombustion cell body 1, be equipped with the air-blast device 5 that is used to supply with oxidant gas at the oxidant gas inlet, and the sectional area of the oxidizer gas channel that forms reduces gradually to the oxidant gas outlet from the oxidant gas inlet in oxidant electrode.
However, still there are some defectives in this semi passive type DMFC system, though used air blast, is difficult to the air duct that forms air supply equably in the bipolar plates in battery pile.And because the difference of the air flow resistance that the air duct position is produced, the gas flow that supplies to each air duct is also just different.
Summary of the invention
According to the invention provides a kind of semi passive type fuel cell system, in described system, form the pipeline that air-blast device is connected with the upper end of battery pile, thereby by the air duct that in the bipolar plates of battery pile, forms air supply equably.
According to an aspect of the present invention, provide a kind of semi passive type fuel cell system.Described semi passive type fuel cell system comprises battery pile, a plurality of element cells transverse stack each other in this battery pile.The bipolar plates that each element cell comprises membrane electrode assembly and is positioned at these membrane electrode assembly both sides.Described membrane electrode assembly has dielectric film, negative electrode and anode.Negative electrode is positioned at a side of dielectric film, and anode is positioned at the opposite side of dielectric film.This semi passive type fuel cell system further comprises the device and the air fed device of fueling.Every bipolar plates has air duct, and this air duct is formed on the cathodic surface, and extends to the lower end of bipolar plates from the upper end of bipolar plates.Described air fed device comprises the pipeline of the top and bottom that are installed in battery pile respectively and the air-blast device that blasts air by this pipeline.Each air duct can be the rectilinear form that extends to its lower end from the upper end of electrode stack in the bipolar plates.In one embodiment, described pipeline comprises first pipeline that is installed in the battery pile upper end and second pipeline that is installed in the battery pile lower end.Air-blast device is installed with from first pipeline first air supply.Described first pipeline comprises first pipeline first that air-blast device is installed and the first pipeline second portion that has covered the whole upper end of battery pile.The upper wall that passes the first pipeline first directly over described air-blast device is formed with air entry.The lower wall that passes the first pipeline second portion is formed with to the air fed air supply opening of battery pile, and it has the area suitable with the upper end area of battery pile.And the upper wall of the first pipeline second portion is downward-sloping and have predetermined inclination angle, thereby the height of upper wall reduces to the other end of upper wall gradually from the end near described air-blast device.In addition, the described first pipeline first is set, makes it have the height suitable in fact with the height of described air-blast device.Air-blast device is installed, is made it suck air, then inhaled air is supplied with the first pipeline second portion by air entry.In addition, the upper wall that passes second pipeline is formed with the air receiving port that is used to receive by the air of battery pile, and it has the area suitable with the lower end area of this battery pile.The other end that passes second pipeline is formed with and is used for air is discharged the outer exhaust outlet of system.The lower wall of second pipeline is downward-sloping and have predetermined inclination angle, thereby the height of this lower wall increases to the other end gradually from an end of second pipeline.In addition, the lower wall of this second pipeline is with the inclination angle inclination same with the upper wall of first pipeline.
In addition, according to the present invention, described air-blast device is air blast or fan.
In addition,, form the air duct of bipolar plates, make the sectional area of the air duct that a part in bipolar plates forms be different from the sectional area of the air duct that the another part in this bipolar plates forms according to the present invention.
Further,, form the air duct of bipolar plates, make the sectional area of the air duct that the sectional area of the air duct that a part in the bipolar plates of closing on air-blast device forms forms greater than the another part in this bipolar plates according to the present invention.Form the air duct of bipolar plates, make the sectional area of air duct reduce gradually to another part from the part of this bipolar plates.
Further, according to the present invention, described air feeder further comprises and is formed on air conditioning layer battery pile upper end, that cover the zone that comprises the zone that is formed with described air duct.Described air conditioning layer is connected in this first pipeline and in occupation of whole air supply opening.
In addition, according to the present invention, this air conditioning layer is made of the porous material that air can pass through.This air conditioning layer is made by the porous material with micropore, and the sectional area of this micropore is less than the sectional area of described air duct.
In addition, according to the present invention, this air conditioning layer can form the solution-air separating layer by in polytetrafluoroethylene (PTFE), silicones, polyethylene (PE), polypropylene (PP) and the PETG materials such as (PET) one or more, but be not limited to these materials, perhaps by such as
Figure C200610152821D0012181918QIETU
Wiping materials such as cleaning wiping cloth or such as
Figure C200610152821D0012181925QIETU
Gas permeable materials such as material form.Wherein, Be the registered trade mark of Kimberly-Clark company, Gore-
Figure C200610152821D0012181953QIETU
Be W.L.Gore ﹠amp; The registered trade mark of Associates.
In addition, according to the present invention, described air conditioning layer comprises by passing through the metal screen of air or first wire netting that the porous metals foaming body forms.Form this first wire netting, make the opening size of its opening size less than air duct.In addition, this first wire netting further comprises a whole lip-deep solution-air separating layer that is formed at this first wire netting.This solution-air separating layer can be formed by in polytetrafluoroethylene (PTFE), silicones, polyethylene (PE), polypropylene (PP) and the PETG materials such as (PET) one or more, but is not limited to these materials.
In addition, according to the present invention, described air conditioning layer further comprises second wire netting that is formed on the battery pile lower end, comprises the zone in the zone that is formed with described air duct with covering.This second wire netting is by forming by the metal screen or the porous metals foaming body of air.Further, this second wire netting further comprises a whole lip-deep solution-air separating layer that is formed at this second wire netting.This solution-air separating layer can be formed by in polytetrafluoroethylene (PTFE), silicones, polyethylene (PE), polypropylene (PP) and the PETG materials such as (PET) one or more, but is not limited to these materials.
In addition, according to the present invention, heat pipe is connected with first and second wire netting.In addition, this heat pipe be included in described first wire netting laterally with predetermined space a plurality of rods separated from one another, bar or plate.In addition, this heat pipe is the veneer shape, and its width is suitable with the first wire netting width, and has predetermined thickness.In addition, this heat pipe is made by copper or aluminum metal.Between this heat pipe and described battery pile, be formed with electric insulation layer.
In addition, according to the present invention, described air feeder further comprises conditioner, and it is formed on first side opposite in the position that separates preset distance with air-blast device, in the horizontal expansion of first pipeline, and outstanding downwards predetermined length.This conditioner is formed at the mid portion longitudinally of the first pipeline second portion.In addition, this conditioner and first pipeline form, and the upper wall of this first pipeline is inwardly outstanding.In addition, spacing block links to each other with the upper wall inner surface of the first pipeline second portion, forms this conditioner thus.Further, the cross sectional shape semicircular in shape or the triangle of this conditioner.In addition, form described conditioner, make the conditioner that directly contacts with air front surface with respect to airflow direction in obtuse angle or have a camber profile.In addition, this conditioner has the outstanding length of the 30%-70% of the inner space height that is equivalent to first pipeline at its installed position.
In addition, according to the present invention, described fuel cell system comprises direct methanol fuel cell system or polymer dielectric film fuel cell system.
Further, according to another aspect of the present invention, provide a kind of semi passive type fuel cell system.Described semi passive type fuel cell system comprises battery pile, a plurality of element cells transverse stack each other in this battery pile.The bipolar plates that each element cell comprises membrane electrode assembly and is positioned at these membrane electrode assembly both sides.Described membrane electrode assembly comprises dielectric film, negative electrode and anode.Negative electrode is positioned at a side of dielectric film, and anode is positioned at the opposite side of dielectric film.This semi passive type fuel cell system further comprises the device and the air fed device of fueling.Every bipolar plates all has air duct, and this air duct is formed on the cathodic surface, and extends to its lower end from the upper end of bipolar plates.Described air fed device comprises the pipeline of the top and bottom that are installed in battery pile respectively, be installed in the first of a pipeline and by the air fed air-blast device of pipeline, and in a pipeline, be arranged at the filter between the upper end of this air-blast device and this battery pile.In addition, each air duct can be the rectilinear form that extends to its lower end from the upper end of battery pile in the bipolar plates.
In addition, according to the present invention, described pipeline comprises first pipeline that is installed in this battery pile upper end and second pipeline that is installed in this battery pile lower end; And, install described air-blast device with from the first pipeline first to the first pipeline second portion air supply.This first pipeline first comprises described air-blast device, and this first pipeline second portion has covered the whole upper end of battery pile.The upper wall that passes the first pipeline first directly over described air-blast device is formed with air entry.The lower wall that passes the first pipeline second portion is formed with to the air fed air supply opening of battery pile, and it has the area suitable with the upper end area of battery pile.And the upper wall of the first pipeline second portion is downward-sloping and have predetermined inclination angle, thereby the height of upper wall reduces to the other end of upper wall gradually from the end near described air-blast device.
In addition, according to the present invention, described filter has the area suitable with the cross-sectional area of first pipe interior, and it is installed on the direction perpendicular to air-flow.This filter is installed in the corresponding position of an end with battery pile.In addition, this filter is by forming by the porous material of air.In addition, this filter is formed by in polytetrafluoroethylene (PTFE), silicones, polyethylene (PE), polypropylene (PP) and the PETG materials such as (PET) one or more, but is not limited to these materials.Further, this filter is installed in the first ducted supporting bracket and supports.In addition, the upper wall that passes second pipeline is formed with the air receiving port that is used to receive by the air of battery pile, and it has the area suitable with the lower end area of this battery pile.The other end that passes second pipeline is formed with and is used for air is discharged the outer exhaust outlet of system.In addition, the lower wall of second pipeline is downward-sloping and have predetermined inclination angle, thereby the height of this lower wall increases to the other end gradually from an end of this lower wall.In addition, the lower wall of this second pipeline is with the inclination angle inclination same with the upper wall of first pipeline.Simultaneously, the upper wall of this first pipeline second portion has consistent height.Further, the lower wall of this second pipeline has consistent height.
Description of drawings
Fig. 1 is the integrally-built schematic diagram of the semi passive type fuel cell system of illustration first embodiment of the invention.
Fig. 2 is the perspective view of battery pile of the semi passive type fuel cell system of illustration first embodiment of the invention.
Fig. 3 is the decomposition diagram of battery pile shown in Figure 2.
Fig. 4 is the perspective view of illustration battery pile shown in Figure 1 and the annexation between the air-blast device.
Fig. 5 is the viewgraph of cross-section along Fig. 4 center line A direction.
Fig. 6 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 5.
Fig. 7 is the integrally-built schematic diagram of illustration semi passive type fuel cell system second embodiment of the invention.
Fig. 8 is the perspective view of the battery pile of illustration semi passive type fuel cell system second embodiment of the invention.
Fig. 9 is the decomposition diagram of battery pile shown in Figure 8.
Figure 10 is the front view of the bipolar plate surfaces that is formed with air duct shown in illustration Fig. 9.
Figure 11 is the perspective view of illustration battery pile shown in Figure 7 and the annexation between the air-blast device.
Figure 12 is the viewgraph of cross-section along Figure 11 center line B direction.
Figure 13 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 12.
Figure 14 is the computer graphics of semi passive type fuel cell system second embodiment of the invention, is used for according to air duct size simulation air velocity.
Figure 15 be obtain by numerical analysis, the computer graphics of illustration by the analog result of the air velocity of each air duct.
Figure 16 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 3rd execution mode of the present invention.
Figure 17 is the perspective view of the annexation between illustration battery pile shown in Figure 16, air-blast device and the air conditioning layer.
Figure 18 is the viewgraph of cross-section along Figure 17 center line C direction.
Figure 19 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 180.
Figure 20 is the computer graphics of Velocity Profiles in the illustration battery pile shown in Figure 16.
Figure 21 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 4th execution mode of the present invention.
Figure 22 is the perspective view of the annexation between illustration battery pile shown in Figure 21 and the air conditioning layer.
Figure 23 is the viewgraph of cross-section along Figure 22 center line D direction.
Figure 24 is the enlarged perspective of first wire netting that uses in the semi passive type fuel cell system of illustration according to the 4th execution mode of the present invention.
Figure 25 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 23.
Figure 26 is the computer graphics of Velocity Profiles in the illustration battery pile shown in Figure 21.
Figure 27 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 5th execution mode of the present invention.
Figure 28 is the perspective view of illustration battery pile shown in Figure 27 and the annexation between the air-blast device.
Figure 29 is the viewgraph of cross-section along Figure 28 center line E direction.
Figure 30 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 29.
Figure 31 is the computer graphics according to the semi passive type fuel cell system of the 5th execution mode of the present invention, is used for the air velocity of simulated battery heap.
Figure 32 be obtain by numerical analysis, the computer graphics of the analog result of air velocity in the illustration battery pile.
Figure 33 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 6th execution mode of the present invention.
Figure 34 is the perspective view of illustration battery pile shown in Figure 33 and the annexation between the air-blast device.
Figure 35 is the viewgraph of cross-section along Figure 34 center line F direction.
Figure 36 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 7th execution mode of the present invention.
Figure 37 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 35.
Figure 38 is the computer graphics of Velocity Profiles in the illustration battery pile shown in Figure 35.
Figure 39 is the battery pile of the existing semi passive type fuel cell system of illustration and the schematic diagram of air-blast device.
Embodiment
Referring to figs. 1 through Fig. 5, the semi passive type fuel cell system 100 of first embodiment of the invention comprises battery pile 10, is used for the fuel supply system 30 to battery pile 10 fuelings, and is used for to battery pile 10 air fed air feeders 50.At this, being primarily aimed at directly is that direct methanol fuel cell (DMFC) system that fuel produces electric energy describes with methyl alcohol.Certainly, the fuel hydrogen that also can be applied to utilize fuel reforming to generate according to fuel cell system of the present invention produces polymer dielectric film fuel cell (PEMFC) system of electric energy.This PEMFC need reform and generates the reformer of hydrogen liquid fuel.
Battery pile 10 comprises the element cell 10a of a plurality of transverse stacks each other.Each element cell 10a comprises membrane electrode assembly (MEA) 12 and the bipolar plates 16 that is positioned at these MEA12 both sides.Form described bipolar plates 16, make two surfaces of bipolar plates 16 contact, and share by two element cell 10a with MEA12.This battery pile 10 is powered to external loading by end plate 16a, and this end plate 16a is the bipolar plates that is positioned at two transverse end of battery pile 10.This battery pile 10 further comprises supporting bracket 16b, and its outer surface with end plate 16a is connected, and is used for fixing bipolar plates 16 and MEA12.Each supporting bracket 16b is provided with suitable passage (not shown) therein, and the fuel of supplying with from fuel supply system 30 can be transported to bipolar plates 16 by this suitable passage like this.This end plate 16a can carry out the additional functionality of supporting bracket 16b.
When the vertical center line of bipolar plates 16 is observed, described battery pile 10 is made of the element cell 10a that is positioned at its left and right sides part.That is to say that when when this battery pile 10 is observed in the front, independently element cell 10a is formed at the left and right sides part of battery pile 10.Further, the core between left side and right sided cell battery 10a, this battery pile 10 has first and second through hole 17a that is used to provide fuel supply channel, 17b.Therefore, this battery pile 10 is by first and second through hole 17a, and 17b is by horizontal fueling.In addition, by being formed on air duct 19 on the every bipolar plates 16, that extend to the lower end from the upper end of bipolar plates 16, this battery pile 10 is supplied to air.Below, will be elaborated to the MEA12 of composition battery pile 10 and the structure of bipolar plates 16.When the vertical center line of bipolar plates 16 was observed, the element cell 10a that is formed on battery pile 10 left and right sides part can be together with each other.In this case, described first and second through hole 17a, 17b is formed on the two side portions of every bipolar plates 16.
Form MEA12, make dielectric film 14 be sandwiched between anode 13 and the negative electrode 15.Described anode 13 comprises the left and right sides part on a surface that lays respectively at dielectric film 14, the anode 13a that is separated out each other, 13b, and negative electrode 15 comprises another the surperficial left and right sides part that lays respectively at dielectric film 14, negative electrode 15a separated from one another, 15b.Like this, there is the non-reaction zone territory in MEA12 at two surperficial core, and this zone is not formed with anode 13 or negative electrode 15.This non-reaction zone territory has first and second through hole 17a that fuel supply channel is provided, 17b.At first and second through hole 17a, between the 17b, this MEA12 can have a lock hole 20, inserts the gim peg that is used for fixing battery pile 10 therein.
Anode 13 and negative electrode 15 comprise the fuel diffusion layer that is used for fuel supply and diffusion, are used for catalyst layer and electrode support that fuel carries out redox reaction.Anode 13 is isolated electronics and hydrogen ion from the fuel of supplying with, dielectric film 14 is transported to negative electrode 15 with hydrogen ion.Negative electrode 15 impels electronics and the hydrogen ion supplied with from anode 13 to react generation water with oxygen.Like this, battery pile 10 produces electric energy by the electrochemical reaction between hydrogen and the oxygen.
Bipolar plates 16 is on two surfaces and its tight contact of MEA12, and has fuel channel 18 and air duct 19 respectively on two surface.When the vertical center line of bipolar plates 16 is observed, fuel channel 18 is positioned at the left and right sides part on a surface of bipolar plates 16, and air duct 19 is positioned at another surperficial left and right sides part of bipolar plates 16.Like this, the core on two surfaces of bipolar plates 16 has the regional 16c of non-formation, 16d, and it is not formed with fuel channel 18 or air duct 19.Bipolar plates 16 closely contacts with the anode 13 of a MEA12 on one surface, closely contacts with the negative electrode 15 of another MEA12 on its another surface simultaneously.Therefore, a surface with anode 13 closely contacts of this bipolar plates 16 is formed with fuel channel 18, and fuel can constantly be supplied with anode 13 like this.In addition, another surface with negative electrode 15 closely contacts of bipolar plates 16 then is formed with air duct 19, thereby air can constantly be supplied with negative electrode 15.
The regional 16d of non-formation that passes the bipolar plates 16 between the left and right sides part on bipolar plates 16 surfaces forms first and second through hole 17a, 17b, this bipolar plates 16 is formed with fuel channel 18, thereby first and second through hole 17a, 17b passes bipolar plates 16, and is connected with the two ends of fuel channel 18.Therefore, in bipolar plates 16, the fuel of supplying with by the first through hole 17a flows through fuel channel 18, flows out by the second through hole 17b subsequently.This first and second through hole 17a, 17b is with equal height and pass bipolar plates 16 and MEA12 and forming, thereby suitably constitutes the fuel channel of the top and the bottom of passing battery pile 10.Therefore, battery pile 10 is supplied to fuel from an one transverse end by the first through hole 17a, and unreacted fuel and be discharged from another transverse end of battery pile 10 as the carbon dioxide of byproduct of reaction by the second through hole 17b.At first and second through hole 17a, pass bipolar plates 16 between the 17b and form lock hole 20, it is by gim peg (not shown) self-contained battery heap 10.First and second through hole 17a, 17b is connected with fuel supply system 30 by the suitable passage (not shown) that forms in supporting bracket 16b, so that the fuel circulation.According to the design of battery pile 10, the formation that can in all sorts of ways of the passage on the supporting bracket 16b.
Bipolar plates 16 is made by metal material, and for example aluminium, copper, iron and alloy thereof are perhaps by making such as electric conducting materials such as graphite and carbon compounds.
When the vertical center line of bipolar plates 16 is observed, fuel channel 18 is formed at the left and right sides part on a surface of bipolar plates 16, and contact with the anode 13 of MEA12, thereby possesses the sectional area that the predetermined degree of depth and width promptly are scheduled to.That is to say that fuel channel 18a, 18b are formed at the both sides of the regional 16d of non-formation of the core on a surface that is positioned at bipolar plates 16.This fuel channel 18 can be zigzag to increase the total surface area of fuel channel 18.Correspondingly, because the contact area of the anode 13 of fuel channel 18 and MEA12 increases, anode 13 also can increase with the area that fuel directly contacts.Because battery pile 10 is by the pressure feed fuel of petrolift with expectation, even fuel channel 18 is zigzag, fuel also can supply to battery pile 10 reliably.
When the vertical center line of bipolar plates 16 is observed, air duct 19 is formed at another surperficial left and right sides part of bipolar plates 16, and contacts with the negative electrode 15 of MEA12, thereby possesses the predetermined degree of depth and width.That is to say that air duct 19a, 19b are formed at the both sides of the regional 16c of non-formation of another the surperficial core that is positioned at bipolar plates 16.Air duct 19 is shape linearly, extend to the lower end from the upper end of bipolar plates 16, thereby from top or below the air supplied with can flow through air duct 19 reliably.Different with fuel channel 18, air duct 19 not with first and second through hole 17a, 17b is connected.
Core in MEA12 and bipolar plates 16 can not have non-reaction zone territory and non-formation zone.In other words, MEA12 can not have the non-reaction zone territory, entirely forms anode 13 and negative electrode 15 respectively on two surface.In addition, bipolar plates 16 can not have non-formation zone, entirely forms fuel channel 18 and air duct 19 respectively on two surface.In this case, in battery pile 10, the two side portions of passing bipolar plates 16 and MEA12 forms first and second through hole 17a, 17b.
Fuel supply system 30 comprises the tanks 32 that is used to store the fuel that is diluted to predetermined concentration, and is used for the petrolift 34 to battery pile 10 fuelings.Be designed to mix the original fuel liquid and the water of preparation respectively when tanks 32, and when original fuel liquid was diluted to predetermined concentration, this fuel supply system 30 may further include original fuel flow container (not shown) and the original fuel liquid pump (not shown) that is used to store original fuel liquid.Tanks 32 can be tubular, wherein stores the fuel that is diluted to predetermined concentration.If the fuel that is stored in the tanks 32 uses up, timely postcombustion or new tanks is installed.
In tanks 32, store liquid fuels such as the methyl alcohol that is diluted to predetermined concentration or ethanol.Petrolift 34 is connected with tanks 32, and will be contained in the anode 13 of the fuel supply battery pile 10 in the tanks 32.When being diluted to predetermined concentration when tanks 32 receptions and with original fuel liquid, tanks 32 is connected with the anode 13 and the negative electrode 15 of battery pile 10 by different pipelines, reaches from the water of negative electrode 15 dischargings of battery pile 10 thereby can collect the unreacted fuel of discharging from the anode 13 of battery pile 10.
Air feeder 50 comprises and is used to suck and the air-blast device 51 of discharged air, and will supply with the pipeline 60 of going up of battery pile 10 or lower end from the air that air-blast device 51 is discharged.
Air-blast device 51 sucks extraneous air and discharges inhaled air with constant pressure.This air-blast device 51 comprises air blast or fan.Certainly, air-blast device 51 also can comprise other various can be with the device of desired pressure air-out.
Pipeline 60 comprises first pipeline 61 of the upper end that is installed on battery pile 10 and second pipeline 71 that is installed on the lower end of battery pile 10.Air-blast device 51 is installed in the inside or the outside of first pipeline 61 or second pipeline 71.The air that pipeline 60 is used for discharging from air-blast device 51 is directed to the upper end of battery pile 10, by air duct 19 air supplies.Though in the present embodiment illustration first pipeline 61 be installed on the upper end of battery pile 10, second pipeline 71 is installed on the lower end of battery pile 10, but be to be understood that, purposes or design according to communication terminal, first pipeline 61 can be installed on the lower end of battery pile 10, and second pipeline 71 can be installed on the upper end of battery pile 10.
First pipeline 61 can be the box-like structure of hollow.First pipeline 61 has in inside or outer setting has the first of air-blast device 51, and the second portion that is positioned at these battery pile 10 upper ends.(at this, as shown in Figure 1, first pipeline, 61 firsts are equivalent to be provided with the left part of air-blast device 51, and outwards outstanding from battery pile 10 upper ends, and first pipeline, 61 second portions are equivalent to be positioned at the right side part of battery pile 10 upper ends).Can form first pipeline 61, pipeline 61 firsts that win are had and the corresponding in fact height of the height of air-blast device 51, and this air-blast device 51 be arranged in first pipeline 61 firsts.The upper wall that passes first pipeline, 61 firsts forms air entry 62, thereby air-blast device 51 can suck air by air entry 62.The area of air entry 62 can be suitable with the top area of air-blast device 51.First pipeline, 61 firsts have consistent height, so that inhaled air can flow to first pipeline, 61 second portions reliably.One end 61a of first pipeline 61 can close to prevent leaking into the outside by air-blast device 51 inhaled airs.Thereby first pipeline 61 impels by air-blast device 51 inhaled airs to be supplied with to first pipeline, 61 second portions.
First pipeline, 61 second portions have the suitable sectional area of area with battery pile 10 upper ends, and have predetermined height so that first pipeline, 61 second portions can clad battery the whole upper end of heap 10.Open with the lower wall of first pipeline, 61 second portions of end in contact on the battery pile 10, form air supply opening 63.Air supply opening 63 can have and corresponding profile in battery pile 10 upper ends and area.Therefore, in first pipeline 61, be directed to second portion by air entry 62 inhaled airs, and supply to the air duct 19 of battery pile 10 by air supply opening 63 by the air-blast device in the first 51.
Can form first pipeline, 61 second portions, the height that makes the pipeline 61 second portion inside of winning reduces to the other end gradually from an end of battery pile 10.That is, form first pipeline, 61 second portions, the upper wall 61c that makes pipeline 61 second portions of winning is towards battery pile 10 upper ends and downward-sloping, to have predetermined inclination angle.Like this, the sectional area that departs from air-blast device 51, the first pipelines 61 second portions along with first pipeline, 61 second portions gradually reduces gradually, thereby the speed of guaranteeing the air of discharging from air-blast device 51 can not reduce.In general, keep constant situation at the sectional area of pipeline, when air during away from air-blast device, the speed of air and quantity delivered can decrease.This phenomenon can become more serious when the air capacity of discharging from air-blast device reduces.Therefore, according to the air capacity of discharging from air-blast device 51, first pipeline, 61 second portions can form the appropriate tilt angle at upper wall 61c.That is to say that if the air capacity of discharging from air-blast device 51 increases, then first pipeline, 61 second portions can form less inclination angle at upper wall 61c.On the contrary, if the air capacity of discharging from air-blast device 51 reduces, then first pipeline, 61 second portions can form bigger inclination angle at upper wall 61c.
Similar to the situation of first pipeline 61, second pipeline 71 can be the box-like structure of hollow.Second pipeline 71 is installed on battery pile 10 lower ends and clad battery is piled 10 lower ends.The upper wall that passes second pipeline 71 forms air receiving port 73, and it has the suitable area of area with described battery pile 10 lower ends.One end 71a of this second pipeline 71 closes, and its other end 71b opens, and constitutes exhaust outlet 72.Thereby second pipeline 71 is used for the air by battery pile 10 is discharged into the outside.
The lower wall 71c of second pipeline 71 is downward-sloping and have predetermined inclination angle, thereby the inner space height of second pipeline 71 increases to other end 71b gradually from an end 71a of second pipeline 71.Like this, at one end 71a can be than fast relatively at other end 71b to enter the speed of air of second pipeline 71, thereby air can successfully be discharged into the outside.The lower wall 71c of second pipeline 71 can tilt with the inclination angle identical with the upper wall 61c of first pipeline, 61 second portions.Like this, whole fuel cell system can have consistent height, although and have pipeline 50, the height of whole fuel cell system is not local to be increased.Because the inclination of the upper wall 61c of first pipeline, 61 second portions and the lower wall 71c of second pipeline 71, battery pile 10 is fixed with being tilted.
Second pipeline 71 provides discharge-channel for the water that negative electrode 15 reactions in battery pile 10 produce.In this case, the different pipelines that are used to collect water can be arranged on the other end 71b of second pipeline 71.
Fig. 6 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 5.Here, will concentrate at utilizing air feeder 50 to describe to battery pile 10 air fed processes.Owing to utilize fuel supply system 30 to know for those skilled in the art, thereby omit its detailed description to the process of battery pile 10 fuelings.
Be connected with battery pile 10 upper ends for battery pile 10, the first pipelines 61, and second pipeline 71 is connected with battery pile 10 lower ends.Air-blast device 51 is arranged in first pipeline 61 firsts, and first pipeline, 61 second portions are connected with battery pile 10 upper ends.Like this, when air-blast device 51 runnings, this air-blast device 51 sucks air downwards by air entry 62, and inhaled air is from side release to the first pipeline 61 second portions of air-blast device 51.The structure of first pipeline 61 allows to flow to first pipeline, 61 second portions from the air that air-blast device 51 is discharged.The upper wall 61c of first pipeline, 61 second portions is downward-sloping, can not reduce adjacent to the air velocity of the other end 61b of first pipeline 61 and the air capacity of supply guaranteeing.Thereby below first pipeline, 61 second portions, no matter apart from air-blast device 51 how far, the air duct 19 of bipolar plates 16 all can be supplied with the air of constant basis respectively.
The air that has flow through the air duct 19 of bipolar plates 16 flows out battery pile 10 lower ends, and enters second pipeline 71 by the air receiving port 73 of second pipeline 71.Because the air duct 19 of bipolar plates 16 is the linear that extends in vertical direction, it is hereby ensured air-flow stably.Second pipeline 71 is connected with battery pile 10 lower ends, and its structure allows to flow to the other end 71b of second pipeline 71 from the air that battery pile 10 enters wherein.Because the inner space height of second pipeline 71 increases to other end 71b gradually from an end 71a, the air that enters second pipeline 71 from battery pile 10 can successfully flow to other end 71b from an end 71a.The exhaust outlet 72 of the other end 71b of the air that flows to other end 71b from an end 71a by being formed at second pipeline 71 is discharged to the outside.
Fig. 7 is the integrally-built schematic diagram of illustration semi passive type fuel cell system second embodiment of the invention.Fig. 8 is the perspective view of the battery pile of illustration semi passive type fuel cell system second embodiment of the invention.Fig. 9 is the decomposition diagram of battery pile shown in Figure 8.Figure 10 is the front view of the bipolar plate surfaces that is formed with air duct shown in illustration Fig. 9.Figure 11 is the perspective view of illustration battery pile shown in Figure 7 and the annexation between the air-blast device.Figure 12 is the viewgraph of cross-section along Figure 11 center line B direction.
With reference to Fig. 7 to 12, semi passive type fuel cell system 200 second embodiment of the invention comprises battery pile 210, be used for to the fuel supply system 30 of battery pile 210 fuelings and be used for to battery pile 210 air fed air feeders 50.Below in the explanation to semi passive type fuel cell system 200, with the parts identical according to the semi passive type fuel cell system 100 of first execution mode, adopt identically with reference to numbering, its relevant detailed description will be omitted.
Battery pile 210 comprises the element cell 210a of a plurality of transverse stacks each other.Each element cell 210a comprises membrane electrode assembly (MEA) 212 and the bipolar plates 216 that is positioned at these MEA212 both sides.Form described bipolar plates 216, make two surfaces of bipolar plates 216 contact, and share by two element cell 210a with MEA212.This battery pile 210 is powered to external loading by end plate 216a, and this end plate 216a is the bipolar plates that is positioned at two transverse end of battery pile 210.This battery pile 210 further comprises supporting bracket 216b, and its outer surface with end plate 216a is connected, and is used for fixing bipolar plates 216 and MEA212.Each supporting bracket 216b is provided with suitable passage (not shown) therein, and the fuel of supplying with from fuel supply system 30 can be transported to bipolar plates 216 by this suitable passage like this.This end plate 216a can carry out the additional functionality of supporting bracket 216b.
When the vertical center line of bipolar plates 216 is observed, described battery pile 210 is made of the element cell 210a that is positioned at its left and right sides part.That is to say that when when this battery pile 210 is observed in the front, independently element cell 210a is formed at the left and right sides part of battery pile 210.Further, the core between left side and right sided cell battery 210a, this battery pile 210 has first and second through hole 17a that is used to provide fuel supply channel, 17b.Therefore, this battery pile 210 is by first and second through hole 17a, and 17b is by horizontal fueling.In addition, by being formed on air duct 219 on the every bipolar plates 216, that extend to the lower end from the upper end of bipolar plates 216, this battery pile 210 is supplied to air.When the vertical center line of bipolar plates 216 was observed, the element cell 210a that is formed on battery pile 210 left and right sides part can be together with each other.In this case, described first and second through hole 17a, 17b is formed on the two side portions of every bipolar plates 216.
Bipolar plates 216 is on two surfaces and its tight contact of MEA212, and has fuel channel 18 and air duct 219 respectively on two surface.When the vertical center line of bipolar plates 216 is observed, fuel channel 18 is positioned at the left and right sides part on a surface of bipolar plates 216, and air duct 219 is positioned at another surperficial left and right sides part of bipolar plates 216.Like this, the core on two surfaces of bipolar plates 216 has the regional 16c of non-formation, 16d, and it is not formed with fuel channel 18 or air duct 219.Bipolar plates 216 closely contacts with the anode 13 of a MEA212 on one surface, closely contacts with the negative electrode 15 of another MEA212 on its another surface simultaneously.Therefore, a surface with anode 13 closely contacts of this bipolar plates 216 is formed with fuel channel 18, and fuel can constantly be supplied with anode 13 like this.In addition, another surface with negative electrode 15 closely contacts of bipolar plates 216 then is formed with air duct 219, thereby air can constantly be supplied with negative electrode 15.
When the vertical center line of bipolar plates 216 is observed, air duct 219a, 219b are formed at another surperficial left and right sides part of bipolar plates 216, and contact with the negative electrode 15 of MEA212, thereby possess the predetermined degree of depth, width and cross sectional shape.That is to say that air duct 219a, 219b are formed at the both sides of the regional 16c of non-formation of another the surperficial core that is positioned at bipolar plates 216.Air duct 219 is shape linearly, extend to the lower end from the upper end of bipolar plates 216, thereby from top or below the air supplied with can flow through air duct 219 reliably.Different with fuel channel 18, air duct 219 not with first and second through hole 17a, 17b is connected.
Form air duct 219, make the width ' a ' or the degree of depth of air duct 219a in the first be formed at bipolar plates 216, that close on air-blast device 51, bigger than the width ' b ' or the degree of depth of the air duct 219b on the second portion that is formed at bipolar plates 216.That is to say, form air duct 219, make the sectional area of the air duct 219a in the first that is formed at bipolar plates 216 greater than the sectional area of the air duct 219b on the second portion that is formed at bipolar plates 216.The result is, for the air duct 219 that forms, and air duct 219a, the sectional area of 219b reduces to second portion gradually from the first of bipolar plates 216.
As described below, form first pipeline, 61 second portions, the upper wall 61c that makes pipeline 61 second portions of winning is downward-sloping and have predetermined inclination angle towards battery pile 210 upper ends.Thereby the air velocity of discharging from air-blast device 51 can not reduce in the position of contiguous first pipeline, 61 other end 61b.Because the sectional area of the other end 61b of first pipeline 61 is less relatively, and is closed, so the air pressure increase, the air capacity that supplies to air duct 219b also increases.In this case, because in the structure of bipolar plates 216, be formed at the sectional area of the sectional area of the air duct 219b on the second portion of bipolar plates 216 less than the air duct 219a in the first that is formed at bipolar plates 216, the air capacity that supplies to air duct 219b reduces.By considering performance, the maximum height of first pipeline 61 and the factors such as inclination angle of first pipeline, 61 upper wall 61c of air-blast device 51, can suitably determine air duct 219a, the degree that the sectional area of 219b reduces to second portion gradually from the first of bipolar plates 216.Therefore, to reduce degree not definite especially at this for the sectional area of air duct 219.Yet the sectional area of air duct 219 reduces degree and can easily be determined by the numerical analysis that utilizes computer to carry out described below.
Core in MEA212 and bipolar plates 216 can not have non-reaction zone territory and non-formation zone.In other words, MEA212 can not have the non-reaction zone territory, entirely forms anode 13 and negative electrode 15 respectively on two surface.In addition, bipolar plates 216 can not have non-formation zone, entirely forms fuel channel 18 and air duct 19 respectively on two surface.In this case, in battery pile 210, the two side portions of passing bipolar plates 216 and MEA212 forms first and second through hole 17a, 17b.
Figure 13 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 12.Figure 14 is the computer graphics of semi passive type fuel cell system second embodiment of the invention, is used for according to air duct size simulation air velocity.Figure 15 be obtain by numerical analysis, the computer graphics of illustration by the analog result of the air velocity of each air duct.At this, will concentrate at utilizing air feeder 50 to describe to battery pile 210 air fed processes.Owing to utilize fuel supply system 30 to know for those skilled in the art, thereby omit its detailed description to the process of battery pile 210 fuelings.
Be connected with battery pile 210 upper ends for battery pile 210, the first pipelines 61, and second pipeline 71 is connected with battery pile 210 lower ends.Air-blast device 51 is arranged in first pipeline 61 firsts, and first pipeline, 61 second portions are connected with battery pile 210 upper ends.Like this, when air-blast device 51 runnings, this air-blast device 51 sucks air downwards by air entry 62, and inhaled air is from side release to the first pipeline 61 second portions of air-blast device 51.The structure of first pipeline 61 allows to flow to first pipeline, 61 second portions from the air that air-blast device 51 is discharged.The upper wall 61c of first pipeline, 61 second portions is downward-sloping, can not reduce in the position air velocity of the other end 61b of contiguous first pipeline 61 and the air capacity of supply guaranteeing, air pressure is increased.Form the air duct 219a of bipolar plates 216,219b makes air duct 219a, and the sectional area of 219b is along with air duct 219a, and 219b departs from air-blast device 51 and reduces gradually.Thereby although air fed pressure increases gradually towards the other end 61b of first pipeline 61, because air duct 219a, the sectional area of 219b reduces gradually, thereby enters air duct 219a, and the air capacity of 219b reduces relatively.The result is, each is formed at the air duct 219a in first and second part of bipolar plates 216, and 219b is supplied to constant air capacity respectively.
As shown in figure 14, form semi passive type fuel cell system 200, make that the width that is formed at the air duct 219a in bipolar plates 216 1 ends is 2.5mm, the width that is formed at the air duct 219b in bipolar plates 216 other ends is 0.7mm, and the air duct 219a of Xing Chenging betwixt, the width of 219b from one end to the other side reduces gradually.In this case, with reference to illustration Figure 15 of the numerical analysis result that undertaken by computer, enter each air duct 219a of bipolar plates 216, the air velocity of 219b reduces to the other end gradually from bipolar plates 216 1 ends.In other words, according to present embodiment of the present invention, as the air duct 219a of bipolar plates 216, when the sectional area of 219b reduces gradually, air duct 219a, the gas-flow resistance meeting among the 219b increases gradually, and air duct 219a, air velocity among the 219b and throughput can reduce gradually.Can find that by the air duct 219a that forms from bipolar plates 216 end to end, the airflow velocity deviation of 219b is reduced to and is no more than 0.20.In addition, although not shown in the drawings, when the air duct of bipolar plates has identical sectional area, can find that this airflow velocity deviation can increase to and be not less than 0.35.
The air that has flow through first pipeline 61 flows out battery pile 210 lower ends, and enters second pipeline 71 by the air receiving port 73 of second pipeline 71.Because the air duct 219 of bipolar plates 216 is the linear that extends in vertical direction, it is hereby ensured air-flow stably.Second pipeline 71 is connected with battery pile 210 lower ends, and its structure allows to flow to the other end 71b of second pipeline 71 from the air that battery pile 210 enters wherein.Because the inner space height of second pipeline 71 increases to other end 71b gradually from an end 71a, the air that enters second pipeline 71 from battery pile 210 can successfully flow to other end 71b from an end 71a.The exhaust outlet 72 of the other end 71b of the air that flows to other end 71b from an end 71a by being formed at second pipeline 71 is discharged to the outside.
Figure 16 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 3rd execution mode of the present invention.Figure 17 is the perspective view of the annexation between illustration battery pile shown in Figure 16, air-blast device and the air conditioning layer.Figure 18 is the viewgraph of cross-section along Figure 17 center line C direction.
With reference to Figure 16 to 18, comprise battery pile 10, be used for to the fuel supply system 30 of battery pile 10 fuelings and be used for to battery pile 10 air fed air feeders 350 according to the semi passive type fuel cell system 300 of the 3rd execution mode of the present invention.Below in the explanation to semi passive type fuel cell system 300, with the parts identical according to the semi passive type fuel cell system 100 of first execution mode, adopt identically with reference to numbering, its relevant detailed description will be omitted.
Air feeder 350 comprises and is used to suck and the air-blast device 51 of discharged air, to supply with the pipeline 60 of going up of battery pile 10 or lower end from the air that air-blast device 51 is discharged, and be formed at battery pile 10 upper ends comprise the zone in the zone that is formed with air duct 19 with covering air conditioning layer 365.
Air conditioning layer 365 is made by the porous material that can pass through such as air such as sponges.Air conditioning layer 365 can cover the whole upper end of air duct 19, and performance reduces the pressure of supply air and makes the on all four function of air fed pressure.Air conditioning layer 365 is made by the porous material with micropore, and the sectional area of this micropore is less than the sectional area of air duct 19.
Air conditioning layer 365 can form the solution-air separating layer, and this solution-air separating layer allows to pass through such as gases such as air, but does not allow liquid to pass through.This solution-air separating layer can be made by a kind of material that is selected from polytetrafluoroethylene (PTFE) and comprise in the hydrophobic film of silicones.In addition, this air conditioning layer 365 can be made by one or more materials in polyethylene (PE), polypropylene (PP) and the PETG (PET), but is not limited to these materials.At this, the material of solution-air separating layer is not limited to certain material, and on the contrary, various resin materials with hydrophobic property may be used to prepare the solution-air separating layer.
Further, air conditioning layer 365 can by such as Cleaning wiping cloth and Gore-Tex
Figure C200610152821D00282
Materials such as gas permeable material form.At this,
Figure C200610152821D0028182241QIETU
Cleaning wiping cloth has low noise generation level, and forms with polynary protection window in the laboratory, is used for reducing environmental pollution.In addition, by stretching and heating has resistance to heat and chemicals Resin, Gore-
Figure C200610152821D00292
Gas permeable material is formed the extremely thin thin layer with a large amount of pores, and its hole dimension is 2/10, and 000mm can allow air to pass through, but stops moisture to pass through.
Figure C200610152821D00293
It is the registered trade mark of DuPont.Air conditioning layer 365 can be individual layer or sandwich construction.When air conditioning layer 365 has sandwich construction, a plurality of can be stacked mutually by polymeric layer identical or that different materials is made.
Air conditioning layer 365 is formed at battery pile 10 upper ends, comprises the zone in the zone of the air duct 19 that is formed with bipolar plates 16 with covering.The entire cell that air conditioning layer 365 can cover in first pipeline 61 is piled 10 upper ends.Thereby air conditioning layer 365 is connected with air supply opening 63 in being formed at first pipeline, 61 lower walls, to cover whole air supply opening 63.
The function of air conditioning layer 365 is the upper ends that cover whole air duct 19, allows, air pressure 51 that discharge from air-blast device to be passed through by the air of unification.Because and the distance between the air-blast device 51 and the structure of first pipeline 61, the air that supplies to air duct 19 upper ends has different pressure.Air conditioning layer 365 can reduce to supply to the pressure gap of air duct 19.Particularly, air conditioning layer 365 can be along the pressure gap that vertically reduces air of first pipeline 61.Therefore, although in first pipeline 61 position difference longitudinally, the air that supplies to air duct 19 also has constant compression force.The air that has flow through air conditioning layer 365 has constant compression force and passes through air duct 19.
Air conditioning layer 365 has predetermined gas permeability.In other words, air pressure and throughput that the air duct that consider the air pressure of discharging from air-blast device, supplies air to bipolar plates 16 19 is required, air conditioning layer 365 can have suitable gas permeability.The average-size of the pore that the gas permeability of air conditioning layer 365 depends on the material of air conditioning layer 365, form in air conditioning layer 365 and quantity etc.
Figure 19 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 180.Figure 20 is the computer graphics of Velocity Profiles in the illustration battery pile shown in Figure 16.At this, will concentrate at utilizing air feeder 350 to describe to battery pile 10 air fed processes.Owing to utilize fuel supply system 30 to know for those skilled in the art, thereby omit its detailed description to the process of battery pile 10 fuelings.
When the air-blast device 51 in being arranged at pipeline 60 turned round, this air-blast device 51 sucked air downwards by air entry 62, and inhaled air is from side release to the first pipeline 61 second portions of air-blast device 51.The structure of first pipeline 61 allows to flow to first pipeline, 61 second portions from the air that air-blast device 51 is discharged.The upper wall 61c of first pipeline, 61 second portions is downward-sloping, can not reduce adjacent to the air velocity of the other end 61b of first pipeline 61 guaranteeing.Air conditioning layer 365 can fully make the air pressure that supplies to air duct 19 reduce and unification.The air that flows through air conditioning layer 365 has constant compression force, and is supplied to air duct 19.Therefore, the air that supplies to air duct 19 passes through each air duct 19 with identical speed, thereby air-flow is by homogenization.That is to say that as shown in figure 19, in battery pile 10, the speed of air that supplies to air duct 19 is vertically and laterally by unification, and the throughput that enters each air duct 19 is a homogeneous.The result that air velocity distribution as shown in figure 20 (Luminance Distribution) expression obtains by the speed that flows through the air of air duct 19 in the measurement of the lower end of air duct 19.Because the air capacity that supplies to air duct 19 is proportional with the product of the air velocity of respective air passage 19 and sectional area,, might calculate the air capacity that flows through air duct 19 by the measurement air velocity.When carrying out numerical analysis, when air conditioning layer 365 was installed, the velocity deviation of the diverse location of measuring in battery pile 10 lower ends was 4cm/s, is low-down.When air conditioning layer 365 was not installed, the velocity deviation of diverse location was 30cm/s.
The air that has flow through first pipeline 61 flows out battery pile 10 lower ends, and enters second pipeline 71 by the air receiving port 73 of second pipeline 71.Because the air duct 19 of bipolar plates 16 is the linear that extends in vertical direction, it is hereby ensured air-flow stably.Second pipeline 71 is connected with battery pile 10 lower ends, and its structure allows to flow to the other end 71b of second pipeline 71 from the air that battery pile 10 enters wherein.Because the inner space height of second pipeline 71 increases to other end 71b gradually from an end 71a, the air that enters second pipeline 71 from battery pile 10 can successfully flow to other end 71b from an end 71a.The exhaust outlet 72 of the other end 71b of the air that flows to other end 71b from an end 71a by being formed at second pipeline 71 is discharged to the outside.
Figure 21 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 4th execution mode of the present invention.Figure 22 is the perspective view of the annexation between illustration battery pile shown in Figure 21 and the air conditioning layer.Figure 23 is the viewgraph of cross-section along Figure 22 center line D direction.Figure 24 is the enlarged perspective of first wire netting that uses in the semi passive type fuel cell system of illustration according to the 4th execution mode of the present invention.
With reference to Figure 21 to 24, according to the semi passive type fuel cell system 400 of the 4th execution mode of the present invention comprise battery pile 10, be used for to battery pile 10 fuelings fuel supply system 30, be used for supplying with the air feeder 350 and the air conditioning layer 80 of the air of constant pressures to battery pile 10.In addition, semi passive type fuel cell system 400 may further include heat pipe 90.Below in the explanation to semi passive type fuel cell system 400, with the parts identical according to the semi passive type fuel cell system 100 of first execution mode, adopt identically with reference to numbering, its relevant detailed description will be omitted.
Described air conditioning layer 80 comprises first wire netting 81, and it is installed on battery pile 10 upper ends in the zone that comprises the zone that is formed with air duct 19.Air conditioning layer 80 may further include second wire netting 85, and it is being installed on battery pile 10 lower ends as the presumptive area in the exhaust outlet 72 of second pipeline, 71 outlets.Air conditioning layer 80 may further include solution- air separating layer 82,86, and each separating layer is formed at respectively on the surface of first and second wire netting 81,85.
Air conditioning layer 80 is formed can be by the metal screen or the porous metals foaming body of air.Metal screen is a kind of mesh grid that is become, had the sieve aperture of many preliminary dimensions by metal wire knitted.In metal screen,, there is no need to be limited to square sieve aperture though that sieve aperture can form is square.In metal screen, the size of sieve aperture is determined with the unit that is called " order " usually." order " is the unit that is used for measuring the sieve aperture quantity that exists in per square inch.In addition, the size of metal screen also can utilize the sieve aperture length between two one metal wires to measure, and its unit is inch or millimeter etc.The definition of " order " of tolerance metal screen size is along with the difference of country or company is different slightly.For example, in Unite States Standard, the order number is 100 purpose metal screens, and its screen size is 149 microns, and the diameter of metal wire is 100 microns.In addition, the order number is 5 purpose metal screens, and its screen size is 4,000 microns, and the diameter of metal wire is 1,370 micron.The standard size that metal screen can not determined with the order number, but can make by the wire with definite diameter, to reach predetermined screen size.
First wire netting 81 is formed at battery pile 10 upper ends, covers the zone in the zone that comprises the air duct 19 that is formed with bipolar plates 16.The entire cell that first wire netting 81 can cover in first pipeline 61 is piled 10 upper ends.Therefore, first wire netting 81 is connected with air supply opening 63 in the lower wall that is formed at first pipeline 61, to cover whole air supply opening 63.According to and air-blast device 51 between distance and the structure of first pipeline 61, the air that supplies to air duct 19 upper ends can have different pressure.First wire netting 81 can be to supplying to the air increase pressure impedance of air duct 19, and can reduce to supply to the pressure gap of the air of air duct 19.Particularly, first wire netting 81 can be along the pressure gap of vertical reduction air of first pipeline 61.Therefore, although along the difference of position longitudinally of first pipeline 61, the air that supplies to air duct 19 has constant compression force.
Form first wire netting 81, make the opening size of the size of the opening of the wire netting 81 of winning or pore less than air duct 19.First wire netting 81 has predetermined gas permeability.Air pressure and throughput that the air duct 19 that consider the air pressure of discharging from air-blast device, supplies air to bipolar plates 16 is required, first wire netting 81 can have suitable gas permeability.
The same with first wire netting 81, second wire netting 85 is made of metal screen or porous metals foaming body, and occupies the whole exhaust outlet 72 of second pipeline 71.Second wire netting 85 can be mounted perpendicular to exhaust outlet 72.Second wire netting 85 can temporarily delay the air discharging by exhaust outlet 72, and the air-flow in second pipeline 71 is increased resistance.Thereby, when air flows in air duct 19, increasing in the gas-flow resistance meeting of the lower end of air duct 19, the result is that air can flow with constant speed in air duct 19.The opening size of second wire netting 85 can be greater than the opening size of first wire netting 81.If the opening size of second wire netting 85 is too small, then increase in the gas-flow resistance meeting of the lower end of air duct 19, air may supply to air duct 19 smoothly.
Each solution- air separating layer 82,86 is formed at respectively on the surface of first and second wire netting 81,85.Solution- air separating layer 82,86 can make permission such as gases such as air by but the hydrophobic layer that do not allow liquid to pass through.This solution- air separating layer 82,86 can be made by a kind of material that is selected from polytetrafluoroethylene (PTFE) and comprise in the hydrophobic film of silicones.In addition, this solution- air separating layer 82,86 can be made by one or more materials in polyethylene (PE), polypropylene (PP) and the PETG (PET), but is not limited to these materials.At this, the material of solution-air separating layer is not limited to certain material, and is opposite.Various resin materials with hydrophobic property may be used to prepare the solution-air separating layer.
The solution- air separating layer 82,86 and first wire netting 81 and 85 actings in conjunction of second wire netting, the feasible air pressure unification of supplying with battery pile 10.When fuel cell system reversed, the solution-air separating layer 82 that is installed on first wire netting 81 can prevent that the water that generates is back in the air-blast device in the negative electrode of battery pile 10.The solution-air separating layer 86 that is installed on second wire netting 85 can prevent that the water of discharging from battery pile 10 lower ends from leaking into the outside by second wire netting 85.
Heat pipe 90 is made by metal materials such as iron, stainless steel, copper and aluminium.Heat pipe 90 can be made by the metal with high-termal conductivity such as copper or aluminium etc.Heat pipe 90 following formation: a plurality of two ends with plate, pipe or rod of preset width or diameter are connected the distance that each interval is predetermined respectively with first wire netting 81 and second wire netting 85.In addition, heat pipe 90 can form the suitable veneer of width of the width and first wire netting 81.Heat pipe 90 with the heat transferred of second wire netting 85 to first wire netting 81.Because second wire netting 85 is installed in the exhaust outlet 72 of second pipeline 71, based on the temperature rising of the air that flows through battery pile 10, the temperature of second wire netting 85 also can raise.In addition, because heat pipe 90 is connected with second wire netting 85 at the one end, heat can be delivered to heat pipe 90 from second wire netting 85, and the temperature of heat pipe 90 is raise.Further, because first wire netting 81 is connected with the other end of heat pipe 90, heat can be delivered to first wire netting 81 from heat pipe 90, and the temperature of first wire netting 81 is raise.Therefore, the air that flows through first wire netting 81 can be heated to predetermined temperature by the heat of first wire netting 81, supplies to air duct 19 then.Like this, battery pile 10 is supplied to the air of elevated temperature, thereby the W-response efficient of battery pile 10 just can be enhanced.
Heat pipe 90 can have the electric insulation layer 92 of isolation at it on the surface of battery pile 10.That is, insulating barrier 92 is between heat pipe 90 and battery pile 10, to prevent electrically contacting between heat pipe 90 and the battery pile 10.Insulating barrier 92 can be formed on the surface of heat pipe 90, perhaps also can directly be formed on the battery pile 10.Insulating barrier 92 can be made by the adhesive tape with electrical insulation characteristics or such as organic materials such as plastics.In addition, consider the temperature of battery pile 10, this insulating barrier 92 can be made by heat resistant adhesive tape.
Figure 25 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 23.Figure 26 is the computer graphics of Velocity Profiles in the illustration battery pile shown in Figure 21.At this, will concentrate at utilizing air feeder 50 to describe to battery pile 10 air fed processes.Owing to utilize fuel supply system 30 to know for those skilled in the art, thereby omit its detailed description to the process of battery pile 10 fuelings.
When the air-blast device 51 in being arranged at pipeline 60 turned round, this air-blast device 51 sucked air downwards by air entry 62, and inhaled air is from side release to the first pipeline 61 second portions of air-blast device 51.The structure of first pipeline 61 allows to flow to first pipeline, 61 second portions from the air that air-blast device 51 is discharged.The upper wall 61c of first pipeline, 61 second portions is downward-sloping, can not reduce adjacent to the air velocity of the other end 61b of first pipeline 61 guaranteeing.Air conditioning layer 80 can fully make the air pressure that supplies to air duct 19 reduce and unification.The air that flows through first wire netting 81 of air conditioning layer 80 has constant compression force, and is supplied to air duct 19.In addition, when solution-air separating layer 82 was formed on first wire netting 81, this solution-air separating layer 82 also can be to the impedance of air supply increase pressure.Second wire netting 85 can be to the air increase pressure impedance of the air duct 19 that flows through bipolar plates 16, and the pressure of air that flows through battery pile 10 thus is by unification.Therefore, the air that supplies to air duct 19 passes through each air duct 19 with identical speed, thereby air-flow is by homogenization.That is to say that as shown in figure 25, in battery pile 10, the speed of air that supplies to air duct 19 is vertically and laterally by unification, and the throughput that enters each air duct 19 is a homogeneous.Air velocity distribution is as shown in figure 26 represented the result that obtains by the speed that flows through the air of air duct 19 in the measurement of the lower end of air duct 19.Because the air capacity that supplies to air duct 19 is proportional with the product of the air velocity of respective air passage 19 and sectional area,, might calculate the air capacity that flows through air duct 19 by the measurement air velocity.Like this, when the air velocity that flows through air duct 19 was consistent relatively, the air capacity that supplies to each air duct 19 also was a homogeneous.When carrying out numerical analysis, when air conditioning layer 80 was installed, the velocity deviation of the diverse location of measuring in battery pile 10 lower ends was 4cm/s, is low-down.When air conditioning layer 80 was not installed, the velocity deviation of diverse location was 30cm/s.
Heat pipe 90 contacts with first wire netting 81 and second wire netting 85, with heat transferred first wire netting 81 of second wire netting 85.Therefore, when the air themperature that supplies to battery pile 10 increased, the efficient of fuel cell system and performance can be improved.
The air that has flow through first pipeline 61 flows out battery pile 10 lower ends, and enters second pipeline 71 by the air receiving port 73 of second pipeline 71.Because the air duct 19 of bipolar plates 16 is the linear that extends in vertical direction, it is hereby ensured air-flow stably.Second pipeline 71 is connected with battery pile 10 lower ends, and its structure allows to flow to the other end 71b of second pipeline 71 from the air that battery pile 10 enters wherein.Because the inner space height of second pipeline 71 increases to other end 71b gradually from an end 71a, the air that enters second pipeline 71 from battery pile 10 can successfully flow to other end 71b from an end 71a.The exhaust outlet 72 of the other end 71b of the air that flows to other end 71b from an end 71a by being formed at second pipeline 71 is discharged to the outside.
Figure 27 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 5th execution mode of the present invention.Figure 28 is the perspective view of illustration battery pile shown in Figure 27 and the annexation between the air-blast device.Figure 29 is the viewgraph of cross-section along Figure 28 center line E direction.
With reference to Figure 27 to 29, comprise battery pile 10, be used for to the fuel supply system 30 of battery pile 10 fuelings and be used for to battery pile 10 air fed air feeders 550 according to the semi passive type fuel cell system 500 of the 5th execution mode of the present invention.Below in the explanation to semi passive type fuel cell system 500, with the parts identical according to the semi passive type fuel cell system 100 of first execution mode, adopt identically with reference to numbering, its relevant detailed description will be omitted.
Air feeder 550 comprises and is used to suck with the air-blast device 51 of discharged air, will supplies to the pipeline 560 and the air-flow transition device of battery pile 10 upper ends or lower end from the air that air-blast device 51 is discharged, and promptly is used for changing the conditioner 565 of the air-flow of pipeline 560.
Described pipeline 560 comprises first pipeline 61 that is installed on battery pile 10 upper ends and second pipeline 71 that is installed on battery pile 10 lower ends.Air-blast device 51 is installed in the inside or the outside of first pipeline 61 or second pipeline 71.The effect of pipeline 60 is air guide battery pile 10 upper ends that the air-blast device 51 that is installed in first pipeline, 61 firsts is discharged, and by air duct 19 air supplies.
Conditioner 565 is installed in the precalculated position on the upper wall 61c of first pipeline, 61 second portions, to change the airflow direction of the air of discharging from air-blast device 51.Conditioner 565 is formed on the inner surface of upper wall 61c of first pipeline, 61 second portions, in the transversely extension of first pipeline 61, and outstanding downwards predetermined length.Conditioner 565 can partly be transformed into the air-flow of discharging from air-blast device 51 direction vertically downward.Therefore, on first pipeline, 61 second portions, when the other end 61b of air flow first pipeline 61, air partly flows to battery pile 10 in the position that forms conditioner 565.Thereby, partly being turned owing to flow to the air of the other end 61b of first pipeline 61, air velocity just relatively reduces.In addition, stopped partly by conditioner 565 that the air capacity that flows to the other end 61b of first pipeline 61 also reduces relatively owing to flow to the air of the other end 61b of first pipeline 61.Conditioner 565 changes air-flow in battery pile 10 upper ends, and relatively reduces air velocity and the flow of the other end 61b that flows to first pipeline 61.Therefore, be formed at the air duct 19a on two parts of bipolar plates 16,19b can be supplied to constant relatively air capacity.
Conditioner 565 can be formed at the mid portion longitudinally of first pipeline, 61 second portions.That is to say that conditioner 565 is positioned at non-reaction zone territory or the non-formation zone 16c on the core that is formed on battery pile 10, above the 16d.Thereby conditioner 565 can make air supply with equably to be formed at the air duct 19a on of bipolar plates 19 and another part, 19b.
Conditioner 565 can form with the upper wall 61c of first pipeline 61, and the upper wall 61c of this first pipeline 61 is inwardly outstanding.Conditioner 565 can have the cross sectional shape of semicircular in shape in fact, so that the air-flow minimum of interruptionization.In addition, form conditioner 565, make the front surface of the conditioner 565 that directly contacts with air have camber profile or in obtuse angle, be subjected to excessive resistance to prevent air-flow with respect to airflow direction.In this case, the cross sectional shape of conditioner 565 can be triangular in shape, to take minimum space on first pipeline 61.Conditioner 565 can be made of the spacing block that is connected with the inner surface of the upper wall 61c of first pipeline, 61 second portions.
When measuring, conditioner 565 has the outstanding length of the 30%-70% of the maximum internal spatial altitude that is equivalent to first pipeline 61 as the upper wall 61c (or rather, in the position that conditioner 565 is installed) from first pipeline 61.If the outstanding length of conditioner 565 is less than 30% of the inner space height of first pipeline 61, then the degree that changed of air-flow is too little, to such an extent as to can't reduce to install the influence of conditioner 565.In addition, if the outstanding length of conditioner 565 is greater than 70% of the inner space height of first pipeline 61, then the degree that changed of air-flow will be too big, can increase relatively to such an extent as to supply to the air capacity of the air duct 19b on the another part that is formed at bipolar plates 16.
Figure 30 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 29.Figure 31 is the computer graphics according to the semi passive type fuel cell system of the 5th execution mode of the present invention, is used for the air velocity of simulated battery heap.Figure 32 be obtain by numerical analysis, the computer graphics of the analog result of air velocity in the illustration battery pile.Here, will concentrate at utilizing air feeder 550 to describe to battery pile 10 air fed processes.Owing to utilize fuel supply system 30 to know for those skilled in the art, thereby omit its detailed description to the process of battery pile 10 fuelings.
Air-blast device 51 sucks air downwards by air entry 62, and inhaled air is from side release to the first pipeline 61 second portions of air-blast device 51.The structure of first pipeline 61 allows to flow to first pipeline, 61 second portions from the air that air-blast device 51 is discharged.The upper wall 61c of first pipeline, 61 second portions is downward-sloping, can not reduce adjacent to the air velocity of the other end 61b of first pipeline 61 guaranteeing.Conditioner 565 partly changes the air-flow in first pipeline 61, relatively reduces the speed and the flow of the air of the other end 61b that flows to first pipeline 61.Therefore, be formed at the air duct 19a on of bipolar plates 16 and another part, 19b can be supplied to consistent air capacity.That is, conditioner 565 makes and supplies to air duct 19a, the air capacity homogenization of 19b.
The air that has flow through first pipeline 61 flows out battery pile 10 lower ends, and enters second pipeline 71 by the air receiving port 73 of second pipeline 71.Because the air duct 19 of bipolar plates 16 is the linear that extends in vertical direction, it is hereby ensured air-flow stably.Second pipeline 71 is connected with battery pile 10 lower ends, and its structure allows to flow to the other end 71b of second pipeline 71 from the air that battery pile 10 enters wherein.Because the inner space height of second pipeline 71 increases to other end 71b gradually from an end 71a, the air that enters second pipeline 71 from battery pile 10 can successfully flow to other end 71b from an end 71a.The exhaust outlet 72 of the other end 71b of the air that flows to other end 71b from an end 71a by being formed at second pipeline 71 is discharged to the outside.
Figure 33 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 6th execution mode of the present invention.Figure 34 is the perspective view of illustration battery pile shown in Figure 33 and the annexation between the air-blast device.Figure 35 is the viewgraph of cross-section along Figure 34 center line F direction.
With reference to Figure 33 to 35, comprise battery pile 10, be used for to the fuel supply system 30 of battery pile 10 fuelings and be used for to battery pile 10 air fed air feeders 650 according to the semi passive type fuel cell system 600 of the 6th execution mode of the present invention.Below in the explanation to semi passive type fuel cell system 600, with the parts identical according to the semi passive type fuel cell system 100 of first execution mode, adopt identically with reference to numbering, its relevant detailed description will be omitted.
Air feeder 650 comprises and is used for sucking with the air-blast device 51 of discharged air, will supplies to the pipeline 60 of battery pile 10 upper ends or lower end and the filter 665 that is installed on pipeline 60 in the position that separates preset distance with air-blast device 51 from the air that air-blast device 51 is discharged.
Filter 665 is made by the porous material that can pass through such as air such as sponges.Filter 665 can form permission such as gases such as air by but the solution-air separating layer that do not allow liquid to pass through.Filter 665 has the suitable area of cross-sectional area with the inner space of first pipeline 61, and is being installed on the direction perpendicular to the air-flow in first pipeline 61 position of preset distances at interval with air-blast device 51.Be installed between the upper end of air-blast device 51 and battery pile 10 at first pipeline, 61 middle filtrators 665.Filter 665 can be installed in the corresponding position, a upper end with battery pile 10.
Filter 665 is fully in occupation of the cross-sectional area of first pipeline 61, like this air can the air pressure of discharging from air-blast device 51 by the state of unification under by filter 665.Therefore, filter 665 can reduce the air pressure difference in the horizontal generation of first pipeline 61.Since when the air of discharging from air-blast device 51 before filter 665 from first pipeline, 61 firsts when second portion is mobile, air spreads in the horizontal, transversely may produce pressure gap in air-blast device 51 downstreams at first pipeline 61.Thereby the filter 665 that is installed on a upper end of battery pile 10 in first pipeline 61 can temporarily stop the air of supplying with battery pile 10 upper ends, and makes first pipeline 61 air pressure unification transversely.Flow through filter 665 air in the horizontal pressure flowed into first pipeline, 61 second portions by unification.In addition, owing to the upper wall of first pipeline, 61 second portions tilts to have predetermined inclination angle, air can flow with constant in fact speed.
Filter 665 has predetermined gas permeability.In other words, air pressure and throughput that the air duct that consider the air pressure of discharging from air-blast device 51, supplies air to bipolar plates 16 19 is required, filter 665 can have suitable gas permeability.The gas permeability of filter 665 depends on average-size and the quantity that is formed on the pore in the filter 665.
Filter 665 has preset thickness according to the average-size of the pore that wherein forms, and can utilize adhesive layer to be fixed on first pipeline, 61 inner surfaces.In addition, filter 665 can be securely by independently bracing or strutting arrangement 667 supports.Bracing or strutting arrangement 667 is formed the supporting bracket of porous, and its average cell size is greater than the average cell size of filter 665.Filter 665 is fixed by supporting bracket 667 and is supported.
When filter 665 formed the solution-air separating layer, this filter 665 can be made by a kind of material that is selected from polytetrafluoroethylene (PTFE) and comprise in the hydrophobic film of silicones.In addition, filter 665 can be made by one or more materials in polyethylene (PE), polypropylene (PP) and the PETG (PET), but is not limited to these materials.At this, the material of filter 665 is not limited to certain material, and on the contrary, various resin materials with hydrophobic property may be used to prepare the solution-air separating layer.Further, filter 665 can be individual layer or sandwich construction.When filter 665 has sandwich construction, a plurality of can be stacked together mutually by polymeric layer identical or that different materials is made.
Figure 36 is the integrally-built schematic diagram of illustration according to the semi passive type fuel cell system of the 7th execution mode of the present invention.
With reference to Figure 36, comprise battery pile 10, be used for to the fuel supply system 30 of battery pile 10 fuelings and be used for to battery pile 10 air fed air feeders 750 according to the semi passive type fuel cell system 700 of the 7th execution mode of the present invention.Below in the explanation to semi passive type fuel cell system 700, with the parts identical according to the semi passive type fuel cell system 100 of first execution mode, adopt identically with reference to numbering, its relevant detailed description will be omitted.
Air feeder 750 comprises and is used for sucking with the air-blast device 51 of discharged air, will supplies to the pipeline 760 of battery pile 10 upper ends or lower end and the filter 665 that is installed on pipeline 760 in the position that separates preset distance with air-blast device 51 from the air that air-blast device 51 is discharged.
Pipeline 760 comprises first pipeline 761 that is formed at battery pile 10 upper ends and second pipeline 771 that is formed at battery pile 10 lower ends.Air-blast device 51 is installed in the inside or the outside of first pipeline 761 or second pipeline 771.The effect of pipeline 760 is air guide battery pile 10 upper ends that the air-blast device from be installed in first pipeline 761 firsts 51 is discharged, and by air duct 19 air supplies.Though in the present embodiment illustration first pipeline 761 be installed on battery pile 10 upper ends, second pipeline 771 is installed on battery pile 10 lower ends, but be to be understood that, purposes or design according to communication terminal, first pipeline 761 can be installed on battery pile 10 lower ends, and second pipeline 771 can be installed on battery pile 10 upper ends.
First pipeline 761 can be the box-like structure of hollow.First pipeline 761 is included in the second portion that inside or outer setting have the first of air-blast device 51 and be positioned at battery pile 10 upper ends.(at this, as shown in figure 36, first pipeline, 761 firsts are equivalent to be provided with the left part of air-blast device 51, and outwards outstanding from battery pile 10 upper ends, and first pipeline, 761 second portions are equivalent to be positioned at the right side part of battery pile 10 upper ends).Can form first pipeline 761, pipeline 761 firsts that win are had and the corresponding in fact height of the height of air-blast device 51, and this air-blast device 51 be arranged in first pipeline 761 firsts.The upper wall that passes first pipeline, 761 firsts forms air entry (not shown) (with reference to Figure 35), thereby air-blast device 51 can suck air by air entry.The area of air entry can be suitable with the top area of air-blast device 51.First pipeline, 761 firsts have consistent height, so that inhaled air can flow to first pipeline, 761 second portions reliably.First pipeline, 761 1 ends can be closed to prevent leaking into the outside by air-blast device 51 inhaled airs.Thereby first pipeline 761 impels by air-blast device 51 inhaled airs to be supplied with to first pipeline, 761 second portions.
First pipeline, 761 second portions have the suitable sectional area of area with battery pile 10 upper ends, and have predetermined height so that first pipeline, 761 second portions can clad battery the whole upper end of heap 10.Open with the lower wall of first pipeline, 761 second portions of end in contact on the battery pile 10, form air supply opening (not shown) (with reference to Figure 35).Air supply opening can have and corresponding profile in battery pile 10 upper ends and area.Therefore, in first pipeline 761, be directed to second portion by the air entry inhaled air, and supply to the air duct 19 of battery pile 10 by air supply opening by the air-blast device in the first 51.
First pipeline, 761 second portions can have constant height.Therefore, even first pipeline, 761 second portions also can have constant sectional area away from air-blast device 51, the first pipelines 761 second portions.
Similar to the situation of first pipeline 761, second pipeline 771 can be the box-like structure of hollow.Second pipeline 771 is installed on battery pile 10 lower ends and clad battery is piled 10 lower ends.The upper wall that passes second pipeline 771 forms air receiving port (not shown) (with reference to Figure 35), and it has the suitable area of area with described battery pile 10 lower ends.One end of this second pipeline 771 is closed, and its other end is opened, and constitutes exhaust outlet (not shown) (with reference to Figure 35).Thereby second pipeline 771 is used for the air by battery pile 10 is discharged into the outside.
In addition, second pipeline 771 has constant height.Second pipeline 771 provides discharge-channel for the water that negative electrode 15 reactions in battery pile 10 produce.In this case, the different pipelines that are used to collect water can be arranged on the other end of second pipeline 71.
Filter 665 is made by the porous material that can pass through such as air such as sponges.Filter 665 can form permission such as gases such as air by but the solution-air separating layer that do not allow liquid to pass through.Filter 665 has the suitable area of cross-sectional area with the inner space of first pipeline 761, and on the position that separates preset distance with air-blast device 51 is installed in direction perpendicular to the air-flow in first pipeline 761.Be installed between the upper end of air-blast device 51 and battery pile 10 at first pipeline, 761 middle filtrators 665.Filter 665 can be installed in the corresponding position, a upper end with battery pile 10.
Filter 665 is fully in occupation of the cross-sectional area of first pipeline 761, like this air can the air pressure of discharging from air-blast device 51 by the state of unification under by filter 665.Therefore, filter 665 can reduce the air pressure difference in the horizontal generation of first pipeline 761.Thereby the filter 665 that is installed on a upper end of battery pile 10 in first pipeline 761 can temporarily stop the air of supplying with battery pile 10 upper ends, and makes first pipeline 761 air pressure unification transversely.Flow through filter 665 air in the horizontal pressure flowed into first pipeline, 761 second portions by unification.When first pipeline, 761 second portions had constant height, because filter 665 has reduced to supply with the air pressure of first pipeline, 761 second portions, air can be fed into battery pile 10 upper ends equably.
Figure 37 is the viewgraph of cross-section of illustration by the air-flow of battery pile shown in Figure 35.Figure 38 is the computer graphics of Velocity Profiles in the illustration battery pile shown in Figure 35.
When the air-blast device 51 of air feeder 650 turned round, this air-blast device 51 sucked air downwards by air entry 62, and inhaled air is from side release to the first pipeline 61 second portions of air-blast device 51.The structure of first pipeline 61 allows to flow to first pipeline, 61 second portions from the air that air-blast device 51 is discharged.The upper wall 61c of first pipeline, 61 second portions is downward-sloping, can not reduce adjacent to the air velocity of the other end 61b of first pipeline 61 guaranteeing.Filter 665 can temporarily stop the air-flow in first pipeline 61, and makes the transversely pressure unanimity of the air of supply first pipeline 61 second portions at first pipeline 61.Because the upper wall 61c of first pipeline, 61 second portions tilts, the air velocity of the air of the filter 665 of flowing through is by unification.Therefore, filter 665 makes air have constant speed and enters the air duct 19 of bipolar plates 16, and makes the air capacity homogenization that enters in each air duct 19.That is to say, as shown in figure 37, in battery pile 10, air velocity first pipeline 61 transversely by unification, and the air capacity that enters air duct 19 is also by homogenization.The result that air velocity distribution as shown in figure 38 (Luminance Distribution) expression obtains by the speed that flows through the air of air duct 19 in the measurement of the lower end of air duct 19.Because the air capacity that supplies to air duct 19 is proportional with the product of the air velocity of respective air passage 19 and sectional area,, might calculate the air capacity that flows through air duct 19 by the measurement air velocity.When carrying out numerical analysis, when filter 665 was installed, the velocity deviation of the diverse location of measuring in battery pile 10 lower ends was 4cm/s, is low-down.When filter 665 was not installed, the velocity deviation of diverse location was 30cm/s.
The air that has flow through first pipeline 61 flows out battery pile 10 lower ends, and enters second pipeline 71 by the air receiving port 73 of second pipeline 71.Because the air duct 19 of bipolar plates 16 is the linear that extends in vertical direction, it is hereby ensured air-flow stably.Second pipeline 71 is connected with battery pile 10 lower ends, and its structure allows to flow to the other end 71b of second pipeline 71 from the air that battery pile 10 enters wherein.Because the inner space height of second pipeline 71 increases to other end 71b gradually from an end 71a, the air that enters second pipeline 71 from battery pile 10 can successfully flow to other end 71b from an end 71a.The exhaust outlet 72 of the other end 71b of the air that flows to other end 71b from an end 71a by being formed at second pipeline 71 is discharged to the outside.
As mentioned above, the advantage of described semi passive type fuel cell system is according to the embodiment of the present invention, owing to be installed on the side of battery pile upper end such as air-blast devices such as air blast or fans, air supplies to the battery pile upper end by the pipeline that is connected with air-blast device, compare with the situation of directly air being supplied with battery pile from the upper end, the present invention is the air duct air supply in the bipolar plates that is formed at each battery pile equably, and no matter the position of these air ducts how.
In addition, in one embodiment, form the air duct of each bipolar plates, make the sectional area of air duct along with it reduces gradually away from air-blast device.Like this, even from the air capacity of air-blast device output when bigger, the also air duct air supply in the bipolar plates that is formed at each battery pile equably, and no matter the position of these air ducts how.
Further, in one embodiment, the air conditioning layer is installed on the upper end of battery pile air duct in the pipeline that upper wall tilts.Therefore, the air pressure that supplies to the battery pile air duct is by unification, and can be with the flow velocity and the throughput supply air of homogeneous.
In addition, in one embodiment, conditioner is installed in the precalculated position above the battery pile on the inner surface of pipeline of upper wall inclination, to change ducted air-flow, regulates air velocity and the air capacity of supplying with each bipolar plates other end.Therefore, can be equably to the air duct air supply of bipolar plates, and no matter the position of these air ducts how.
In addition, in one embodiment, filter is in the position that separates preset distance with air-blast device is installed in the pipeline that upper wall tilts, so that the horizontal air pressure of pipeline and the air velocity unification of battery pile upper end.Therefore, can be equably to the air duct air supply of bipolar plates.
As mentioned above, only be examples more of the present invention, therefore, any modification that all those skilled in the art are done, be equal to replacement, improvement etc. within above-mentioned spirit of the present invention and principle, all should be included within the claim scope of the present invention.

Claims (53)

1, a kind of semi passive type fuel cell system comprises battery pile, to the device of battery pile fueling and to the air fed device of battery pile; Described battery pile has battery pile upper end, battery pile lower end and a plurality of element cells of transverse stack each other, the bipolar plates that each element cell comprises membrane electrode assembly and is positioned at the membrane electrode assembly both sides, described membrane electrode assembly has dielectric film, negative electrode and anode, described dielectric film has dielectric film first side surface and dielectric film second side surface, described negative electrode is formed on dielectric film first side surface, described anode is formed on dielectric film second side surface, and every bipolar plates has bipolar plates upper end and bipolar plates lower end;
Wherein, every bipolar plates all has air duct on cathodic surface, and this air duct extends to the bipolar plates lower end from the bipolar plates upper end; And described air fed device comprises and is installed in battery pile upper end and the pipeline of battery pile lower end and the air-blast device that blasts air by pipeline respectively;
Described pipeline comprises first pipeline that is installed in the battery pile upper end and second pipeline that is installed in the battery pile lower end;
Described first pipeline comprises the first pipeline first and the first pipeline second portion, in the described first pipeline first air-blast device is installed, and the described first pipeline second portion is clad battery heap upper end fully;
The upper wall of the first pipeline second portion is downward-sloping and have predetermined inclination angle, thereby the height of upper wall reduces to the other end of described upper wall gradually from an end of the close air-blast device of described upper wall.
2, fuel cell system according to claim 1, wherein, the air duct of described bipolar plates is the linear that extends to the battery pile lower end from the battery pile upper end.
3, fuel cell system according to claim 1, wherein, the upper wall that passes the first pipeline first directly over described air-blast device is formed with air entry, the lower wall that passes the first pipeline second portion is formed with to the air fed air supply opening of battery pile, and it has the area suitable with the upper end area of battery pile.
4, fuel cell system according to claim 3, wherein, the described first pipeline first has the height suitable in fact with the height of described air-blast device; And, described air-blast device is installed, make it suck air, and inhaled air is supplied with the first pipeline second portion by air entry.
5, fuel cell system according to claim 1, wherein, described second pipeline comprises the second pipeline left end and the second pipeline right-hand member; And the upper wall that passes second pipeline is formed with the air receiving port that is used to receive by the air of battery pile, and it has the area suitable with the lower end area of this battery pile, passes the second pipeline right-hand member and is formed with the exhaust outlet that is used for air is discharged to the outside.
6, fuel cell system according to claim 5, wherein, the lower wall of described second pipeline is downward-sloping and have predetermined inclination angle, thus the height of this lower wall increases to the second pipeline right-hand member gradually from the second pipeline left end.
7, fuel cell system according to claim 6, wherein, the lower wall of described second pipeline is with the inclination angle inclination same with the upper wall of first pipeline.
8, fuel cell system according to claim 1, wherein, described air-blast device comprises air blast or fan.
9, fuel cell system according to claim 1, wherein, described bipolar plates has bipolar plates first and bipolar plates second portion; And, form the air duct of described bipolar plates, make the sectional area that is formed on the air duct in the bipolar plates first be different from the air duct that is formed on the bipolar plates second portion.
10, fuel cell system according to claim 9, wherein, form the air duct of described bipolar plates, make be formed on the nearest bipolar plates first of air-blast device on the sectional area of air duct greater than the sectional area that is formed on the air duct on the bipolar plates second portion.
11, fuel cell system according to claim 10 wherein, forms the air duct of described bipolar plates, makes the sectional area of air duct reduce gradually to the bipolar plates second portion from bipolar plates first.
12, fuel cell system according to claim 1, wherein, described air fed device further comprises and is formed on air conditioning layer battery pile upper end, that cover the zone that comprises the zone that is formed with air duct.
13, fuel cell system according to claim 12, wherein, described air conditioning layer is connected with first pipeline, in occupation of whole air supply opening.
14, fuel cell system according to claim 12, wherein, described air conditioning layer is made of the porous material that air can pass through.
15, fuel cell system according to claim 14, wherein, described air conditioning layer is made of the porous material with micropore, and the sectional area of this micropore is less than the sectional area of described air duct.
16, according to the described fuel cell system of claim 12, wherein, described air conditioning layer is by a kind of solution-air separating layer that forms that is selected from polytetrafluoroethylene, silicones, polyethylene, polypropylene and the PETG.
17, fuel cell system according to claim 12, wherein, described air conditioning layer is made of Wiping material or gas permeable material.
18, fuel cell system according to claim 12, wherein, described air conditioning layer comprises first wire netting that air can pass through, this first wire netting is made of metal screen or porous metals foaming body.
19, fuel cell system according to claim 18 wherein, forms described first wire netting, makes the opening size of its opening size less than air duct.
20, fuel cell system according to claim 18, wherein, described first wire netting further comprises a whole lip-deep solution-air separating layer that is formed at this first wire netting.
21, fuel cell system according to claim 20, wherein, described solution-air separating layer is by a kind of formation that is selected from polytetrafluoroethylene, silicones, polyethylene, polypropylene and the PETG.
22, fuel cell system according to claim 18, wherein, described air conditioning layer further comprises second wire netting that is formed on the battery pile lower end, comprises the zone in the zone that is formed with air duct with covering.
23, fuel cell system according to claim 22, wherein, described second wire netting allows air to pass through, and is made of metal screen or porous metals foaming body.
24, fuel cell system according to claim 23, wherein, described second wire netting further comprises a whole lip-deep solution-air separating layer that is formed at this second wire netting.
25, fuel cell system according to claim 24, wherein, described solution-air separating layer is by a kind of formation that is selected from polytetrafluoroethylene, silicones, polyethylene, polypropylene and the PETG.
26, fuel cell system according to claim 22, wherein, heat pipe is connected with first wire netting and second wire netting.
27, fuel cell system according to claim 26, wherein, described heat pipe be included in described first wire netting laterally with predetermined space a plurality of rods separated from one another, bar or plate.
28, fuel cell system according to claim 26, wherein, described heat pipe is the veneer shape, and its width is suitable with the first wire netting width, and has predetermined thickness.
29, fuel cell system according to claim 26, wherein, described heat pipe is made by copper or aluminum metal.
30, fuel cell system according to claim 26 wherein, is formed with electric insulation layer between heat pipe and battery pile.
31, fuel cell system according to claim 1, wherein, described air feeder further comprises conditioner, it is formed on first side opposite in the position that separates preset distance with air-blast device; And described conditioner is in the horizontal expansion of first pipeline, and outstanding downwards predetermined length.
32, fuel cell system according to claim 31, wherein, described conditioner is formed at the mid portion longitudinally of the first pipeline second portion.
33, fuel cell system according to claim 31, wherein, described conditioner is a projection, this projection and first pipeline form, and inwardly outstanding at the upper wall of first pipeline.
34, fuel cell system according to claim 31, wherein, described conditioner is formed by the spacing block that the upper wall inner surface with the first pipeline second portion links to each other.
35, fuel cell system according to claim 31, wherein, the cross sectional shape semicircular in shape or the triangle of described conditioner.
36, fuel cell system according to claim 31, wherein, the front surface of described conditioner directly contacts with air, and described front surface is with respect to airflow direction in obtuse angle or have a camber profile.
37, fuel cell system according to claim 31, wherein, described conditioner has the outstanding length of the 30%-70% of the inner space height that is equivalent to first pipeline at its installed position.
38, fuel cell system according to claim 1, wherein, described fuel cell system is direct methanol fuel cell system or polymer dielectric film fuel cell system.
39, a kind of semi passive type fuel cell system comprises battery pile, to the device of battery pile fueling and to the air fed device of battery pile; Described battery pile has battery pile upper end, battery pile lower end and a plurality of element cells of transverse stack each other, the bipolar plates that each element cell comprises membrane electrode assembly and is positioned at the membrane electrode assembly both sides, described membrane electrode assembly has dielectric film, negative electrode and anode, described dielectric film has dielectric film first side surface and dielectric film second side surface, described negative electrode is formed on dielectric film first side surface, described anode is formed on dielectric film second side surface, and every bipolar plates has bipolar plates upper end and bipolar plates lower end;
Wherein, every bipolar plates all has air duct on cathodic surface, and this air duct extends to the bipolar plates lower end from the bipolar plates upper end; Described air fed device comprise first pipeline that is installed in battery pile upper end, second pipeline that is installed in the battery pile lower end, by first pipeline and second pipeline blast the air-blast device of air and in first pipeline, be arranged at air-blast device with battery pile between filter;
Described pipeline comprises first pipeline that is installed in the battery pile upper end and second pipeline that is installed in the battery pile lower end;
Described first pipeline comprises the first pipeline first and the first pipeline second portion, in the described first pipeline first air-blast device is installed, and the described first pipeline second portion is clad battery heap upper end fully;
The upper wall of the first pipeline second portion is downward-sloping and have predetermined inclination angle, thereby the height of upper wall reduces to the other end of described upper wall gradually from an end of the close air-blast device of described upper wall.
40, according to the described fuel cell system of claim 39, wherein, the air duct of described bipolar plates is the linear that extends to the battery pile lower end from the battery pile upper end.
41, according to the described fuel cell system of claim 39, wherein, the upper wall that passes the first pipeline first directly over described air-blast device is formed with air entry, the lower wall that passes the first pipeline second portion is formed with to the air fed air supply opening of battery pile, and it has the area suitable with the upper end area of battery pile.
42, according to the described fuel cell system of claim 39, wherein, described filter has the suitable area of cross-sectional area with the inner space of first pipeline, and is installed on the direction perpendicular to air-flow.
43, according to the described fuel cell system of claim 39, wherein, described filter is installed in the corresponding position of an end with described battery pile.
44, according to the described fuel cell system of claim 39, wherein, described filter is made of the porous material that air can pass through.
45, according to the described fuel cell system of claim 44, wherein, described filter constitutes by being selected from a kind of in polytetrafluoroethylene, silicones, polyethylene, polypropylene and the PETG.
46, according to the described fuel cell system of claim 39, wherein, described filter supports by being installed in the first ducted supporting bracket.
47, according to the described fuel cell system of claim 39, wherein, described second pipeline comprises the second pipeline left end and the second pipeline right-hand member; And the upper wall that passes second pipeline is formed with the air receiving port that is used to receive by the air of battery pile, and it has the area suitable with the lower end area of this battery pile, passes the second pipeline right-hand member and is formed with the exhaust outlet that is used for air is discharged to the outside.
48, according to the described fuel cell system of claim 47, wherein, the lower wall of described second pipeline is downward-sloping and have predetermined inclination angle, thereby the height of this lower wall increases to the second pipeline right-hand member gradually from the second pipeline left end.
49, according to the described fuel cell system of claim 48, wherein, the lower wall of described second pipeline is with the inclination angle inclination same with the upper wall of first pipeline.
50, according to the described fuel cell system of claim 39, wherein, the upper wall of the described first pipeline second portion has consistent height.
51, according to the described fuel cell system of claim 50, wherein, the lower wall of described second pipeline has consistent height.
52, according to the described fuel cell system of claim 39, wherein, described air-blast device comprises air blast or fan.
53, according to the described fuel cell system of claim 39, wherein, described fuel cell system is direct methanol fuel cell system or polymer dielectric film fuel cell system.
CNB2006101528212A 2005-10-20 2006-10-20 Semi passive type fuel cell system Expired - Fee Related CN100505399C (en)

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