CN100570939C - The method of operation of fuel cell system and fuel cell - Google Patents
The method of operation of fuel cell system and fuel cell Download PDFInfo
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- CN100570939C CN100570939C CNB2006800186004A CN200680018600A CN100570939C CN 100570939 C CN100570939 C CN 100570939C CN B2006800186004 A CNB2006800186004 A CN B2006800186004A CN 200680018600 A CN200680018600 A CN 200680018600A CN 100570939 C CN100570939 C CN 100570939C
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- 230000001590 oxidative effect Effects 0.000 claims 1
- 238000003487 electrochemical reaction Methods 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
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- 239000002826 coolant Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
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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
- H01M8/04—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
-
- 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
- H01M8/04126—Humidifying
- H01M8/04141—Humidifying by water containing exhaust gases
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04492—Humidity; Ambient humidity; Water content
- H01M8/04522—Humidity; Ambient humidity; Water content of cathode exhausts
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04761—Pressure; Flow of fuel cell exhausts
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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
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
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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
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/0435—Temperature; Ambient temperature of cathode exhausts
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/0441—Pressure; Ambient pressure; Flow of cathode exhausts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
A kind of fuel cell system, have the fuel cell that the supply of accepting regulation gas generates electricity and utilize the moisture humidification that is included in from the discharge gas that this fuel cell is discharged to supply with the humidifier of the supply gas of this fuel cell, this fuel cell system also has: discharge water component detection mechanism, the detection of the discharge water component that it is included in the described discharge gas and discharges to described humidifier downstream; With adjust processing mechanism, it is under the situation more than the ormal weight be judged as described discharge water component according to described testing result, limits the processing of the described discharge water component of discharging to described humidifier downstream.As a result, can carry out appropriate humidification control.
Description
Technical field
The present invention relates to a kind of fuel cell system, in detail, the present invention relates to a kind of the utilization and be included in the humidification control of carrying out from the moisture in the discharge gas of fuel cell with fuel cell that the supply of accepting regulation gas generates electricity.
Background technology
Will and utilizing in the fuel cell system that hydrogen and the electrochemical reaction that is included in airborne oxygen generate electricity,, be necessary the air of humidification fueling battery in order to ensure the generating efficiency of regulation as the air and the hydrogen fueling battery of reacting gas.In the past, a kind of like this technology is disclosed (for example, open the 2002-75418 communique referring to the Japan Patent spy), promptly, in fuel cell system, be provided with humidifier, air to the fueling battery carries out humidification, and wherein this humidifier has utilized and comprised by the exhaust of electrochemical reaction at the moisture of oxygen utmost point side generation.
For example, in following patent documentation 1, disclose the air that makes by fuel cell (below, be called and discharge gas) and be discharged to outside system through humidifier.In this system, on the stream of discharging gas, between fuel cell and humidifier (promptly, upstream side at humidifier) first pressure-control valve is set, in the downstream of humidifier second pressure-control valve is set, when the humidity of the air of fueling battery is low, the control that the pressure in the humidifier is descended by the aperture that increases by second pressure-control valve.Like this, can make the moisture that is included in the discharge gas become steam, thereby can improve the humidification efficiency of humidifier.
Patent documentation 1: the Japan Patent spy opens the 2002-75418 communique
Summary of the invention
But, in this prior art, consider to be discharged to the discharge gas of fuel cell outside, thereby the humidifying performance of humidifier occurs because the problem that the discharge gas flow of discharge reduces.That is to say that the amount of moisture of discharging in the gas is not all to be used by humidifier, but some is with being discharged to the outside as the air of discharging gas.Being included in the water of amount of moisture for generating electricity and produce along with fuel cell of discharging in the gas, is corresponding with energy output quantitative really.For example, when the air fed flow velocity of the fuel cell of increasing supply in order to increase energy output, the flow velocity of discharging gas also increases.Under this situation, even the amount of increase steam, being discharged to outside amount of moisture as discharge gas also increases, thereby exists the amount of moisture that can be used for humidification to reduce, and then causes the worry of the humidifying performance decline of humidifier.
The present invention proposes in view of the problem of the humidifying performance decline of this humidifier, and its purpose is to provide a kind of fuel cell system of carrying out suitable humidification control.
Fuel cell system of the present invention has adopted following means at above-mentioned purpose.Promptly, fuel cell system of the present invention has the fuel cell that the supply of accepting regulation gas is generated electricity, wherein, have: humidifier, it is arranged on the pipe arrangement pipeline from the discharge gas of described fuel cell, utilizes the moisture humidification that is included in from the discharge gas that this fuel cell is discharged to supply with at least a in the supply gas of this fuel cell; Discharge water component detection mechanism, it is included in the described discharge gas and the detection of the discharge water component of discharging to described humidifier downstream; With adjust processing mechanism, it is under the situation more than the ormal weight be judged as described discharge water component according to described testing result, carries out the restriction of the described discharge water component of discharging to described humidifier downstream and handles.
According to fuel cell system of the present invention, detect the discharge water component of discharging to the humidifier downstream, be restriction discharge water component under the situation more than the ormal weight at the discharge water component.Therefore, suppressed amount of moisture, thereby the most of moisture that comprises in the discharge gas can be used for the humidification of the supply gas in the humidifier to the discharge of humidifier downstream.As a result, suppress the reduction of the humidification efficiency of humidifier, realized the effect of appropriate humidification in humidifier.
Preferably, the discharge water component detection mechanism of the fuel cell system of said structure is included in the above-mentioned discharge gas and the discharge water component of discharging to above-mentioned humidifier downstream brings the physical quantity of influence to detect by giving.
According to this fuel cell system, detect the discharge water component is brought the physical quantity of influence, and detect the discharge water component according to detected physical quantity, therefore can obtain the discharge water component indirectly according to physical quantity.
In addition, as this physical quantity, though the flow velocity of the discharge gas of the outlet temperature of the discharge gas of consideration atmospheric pressure, fuel cell, fuel cell etc., so long as bring the physical quantity of influence to get final product to the discharge water component.
In physical quantity is under the atmospheric situation, and when detected atmospheric pressure was lower than authorized pressure, being judged as the discharge water component was more than the ormal weight.That is, under the situation that atmosphere forces down, the pressure that is judged as in the humidifier reduces, and the discharge water component is more than the ormal weight, at this moment, suppresses the amount of moisture of discharging to the humidifier downstream.Therefore, though under the environment that atmosphere forces down the fuel cell operation system, also can carry out appropriate humidification.
And, be under the situation of outlet temperature in physical quantity, when detected outlet temperature was higher than setting, being judged as the discharge water component was more than the ormal weight.That is, under the high situation of the temperature of the discharge gas of discharging from fuel cell, be judged as that to discharge the moisture that gas comprises more, the discharge water component is more than the ormal weight, at this moment, suppresses the amount of moisture of discharging to the humidifier downstream.By using so general detected temperature, can easily carry out the judgement of discharge water component.
In addition, under the flow rate conditions of physical quantity for discharge gas, when detected velocity ratio setting was high, being judged as the discharge water component was more than the ormal weight.That is, under the high situation of the flow velocity of discharging gas, also uprise, in humidifier, can not carry out sufficient humidification by the flow velocity in the humidifier.Under the high situation of this flow velocity, being judged as the discharge water component is more than the ormal weight, and suppresses the amount of moisture to the discharge of humidifier downstream.Therefore, can in humidifier, carry out appropriate humidification.
Fuel cell system for said structure, further preferably, upstream side at the above humidifier of stream of described discharge gas has the upstream side pressure-regulating valve, this upstream side pressure-regulating valve is adjusted the pressure of the supply gas in the described fuel cell by the pressure of adjusting this discharge gas, and described flow is adjusted processing mechanism and carried out restriction to the described discharge water component in described humidifier downstream by the pressure adjustment of being undertaken by described downstream pressure-regulating valve.
According to this fuel cell system, by carrying out the pressure adjustment of being undertaken by the downstream pressure-regulating valve, the result can limit the flow of discharging.That is,, just can construct out system with comparalive ease by only pressure-regulating valve being configured in the downstream of humidifier.
Fuel cell system for said structure, further preferably, upstream side at the above humidifier of stream of described discharge gas has the upstream side pressure-regulating valve, this upstream side pressure-regulating valve is adjusted the pressure of the supply gas in the described fuel cell by the pressure of adjusting this discharge gas, and, be judged as under the situation that described discharge water component lacks than ormal weight, the pressure adjustment that replacement is undertaken by described downstream pressure-regulating valve, and carry out the pressure adjustment of being undertaken by described upstream side pressure-regulating valve.
According to this fuel cell system, under the few situation of discharge water component, do not limit flow, but carry out the pressure adjustment of being undertaken by the upstream side pressure-regulating valve to the humidifier downstream.Because control by pressure-regulating valve near the upstream side of fuel cell, thus operating lag etc. can be reduced, thus can suppress controlled reduction.
For the fuel cell system of said structure, further preferably, also have requirement humidification amount prediction mechanism, it is inferred with the generating state of described fuel cell is fitted mutually and requires the humidification amount; Described flow is adjusted processing mechanism, infers that described the humidification amount that requires that is under the situation below the setting, with described discharge water component whether be that judgement more than the ormal weight is irrelevant, all carry out the pressure adjustment of being undertaken by described upstream side pressure-regulating valve.。
According to this fuel cell system, requiring under the few situation of humidification amount, carry out the processing of being undertaken by the upstream side pressure-regulating valve.That is to say,, under the less situation about getting final product of required humidification amount, make controlled humidification efficiency preferential, carry out the control of being undertaken by the upstream side pressure-regulating valve than humidifier even be under the situation more than the ormal weight being judged as the discharge water component.Therefore, can carry out appropriate humidification where necessary.
In addition, the present invention can also be interpreted as the fuel cell running method, also can be interpreted as the fuel cell system with following form in addition.A kind of is such fuel cell system, and it comprises the fuel cell that the supply of accepting regulation gas is generated electricity; And humidifier, its utilization is included in the supply gas that moisture humidification from the discharge gas that this fuel cell is discharged is supplied with this fuel cell, wherein, this system has discharge water component detection mechanism, the detection of the discharge water component that it is included in the above-mentioned discharge gas and discharges to above-mentioned humidifier downstream; Adjust processing mechanism with flow, it is under the situation more than the ormal weight be judged as above-mentioned discharge water component according to above-mentioned testing result, limits the processing of the flow of the above-mentioned discharge gas of discharging to above-mentioned humidifier downstream.
And, another is the fuel cell system with fuel cell that the supply of accepting regulation gas generates electricity, it has: humidifier, it is arranged on the pipe arrangement pipeline from the discharge gas of above-mentioned fuel cell, utilizes the moisture humidification that is included in from the discharge gas that this fuel cell is discharged to supply with at least a in the supply gas of this fuel cell; Decision mechanism, whether it judges to be included in this discharge gas and to the condition that the discharge water component that discharge in above-mentioned humidifier downstream increases and sets up according to the quantity of state of above-mentioned discharge gas; Increase mechanism with pressure, it increases the pressure of the above-mentioned discharge gas in this humidifier, to improve the humidification efficiency of above-mentioned humidifier under the situation that the condition that is judged as above-mentioned discharge water component increase is set up.
Description of drawings
Fig. 1 is the simple structure chart as the fuel cell system of the embodiment of the invention.
The flow chart that Fig. 2 handles for the pressure adjustment of first embodiment of the fuel cell system of expression present embodiment.
The flow chart that Fig. 3 handles for the pressure adjustment of second embodiment of the fuel cell system of expression present embodiment.
The flow chart that Fig. 4 handles for the pressure adjustment that adds the judgment processing that requires the humidification amount in the pressure adjustment of first embodiment is handled.
Embodiment
Then, describe implementing embodiments of the present invention in the following sequence based on embodiment.
A. the simple structure of fuel cell system
B. the pressure adjustment of first embodiment is handled
C. the pressure adjustment of second embodiment is handled
D. variation
A. the simple structure of fuel cell system
Fig. 1 is the simple structure chart as the fuel cell system of the embodiment of the invention.This fuel cell system 10 has the fuel cell 20 of acceptance as the supply of the hydrogen of reacting gas and air and the which generate electricity by electrochemical reaction by hydrogen and airborne oxygen, and this system carries on the not shown vehicle of the electric power that fuel cell 20 is sent as power.As shown in the figure, except that fuel cell 20, this system 10 also comprises with the hydrogen system 30 of hydrogen fueling battery 20, with the air system 40 of air fueling battery 20 and the control unit 120 of control each several part etc.
Fuel cell 20 has a plurality of cells 21 that comprise the hydrogen utmost point (below be called anode) and the oxygen utmost point (below be called negative electrode), forms by clamping stacked a plurality of cells 21 by end plate 28,29 from two ends.Cell 21 constitutes by sequentially stacked dividing plate, anode, dielectric film, negative electrode, dividing plate, and the stream of hydrogen, air is set respectively on dividing plate.The stream of above-mentioned various fluids respectively be arranged on end plate 28 on the inlet of various fluids link to each other, the hydrogen, air of supplying with inlet from the outside of fuel cell 20 is each unit of a plurality of cells 21 of supply with being detained.In addition, on end plate 28, also be provided with the inlet of cooling agent, the coolant cools fuel cell of supplying with from the outside 20.
The hydrogen of supplying with the anode in each cell 21 be subjected to constituting anode catalyst layer catalytic action and produce hydrogen ion.This hydrogen ion sees through dielectric film and arrives cathode side, with the airborne oxygen reaction of supplying with negative electrode.By this electrochemical reaction, cell 21 generatings.Fuel cell 20 can be exported higher electric power by a plurality of such cells 21 are connected in series.In addition, in the present embodiment, solid polymer membrane is used as dielectric film.This dielectric film can be worked under the moisture state of prescribed limit well.
Hydrogen system 30 is made of the hydrogen jar 31 that stores high pressure hydrogen, hydrogen circulating pump 32, not shown valve etc., and the hydrogen of being adjusted behind pressure, the flow by valve is supplied to fuel cell 20.Hydrogen in the hydrogen of fueling battery 20 is by above-mentioned electrochemical reaction consumption, still, exists its part not to be consumed and the situation of discharging from fuel cell 20.The hydrogen that hydrogen circulating pump 32 will be discharged from fuel cell 20 is fueling battery 20 once again, can effectively utilize the hydrogen that is not used by electrochemical reaction and discharge.In addition,, also can replace, for example to modifications such as methane, methyl alcohol and produce hydrogen and its fueling battery from the supply of hydrogen jar 31 for the supply of hydrogen to fuel cell 20.
Air system 40 is mainly by the feeding pipe of air fueling battery 20 and the gas exhaust piping that will import gas extraction system 80 described later from the hydrogen that fuel cell 20 is discharged are constituted.
Feeding pipe set gradually from the upstream of the air of fueling battery 20 stream inside have the atmosphere pressure sensor 47 of semiconductor gauge, the air filter 41 of removing airborne dirt and dust, hot wire mass air flow sensor 42, with motor as the air compressor 43 of power source, cooling air with the humidifier 48 of the intercooler 44 that improves atmospheric density, air that humidification is supplied with, connect the supplying tubing 45,46 of these devices etc., the air in the atmosphere is introduced and with its fueling battery 20 by the driving of air compressor 43.
The air that driving by air compressor 43 is introduced from the outside is at first purified by air filter 41 and by mass air flow sensor 42.Air by mass air flow sensor 42 by air compressor 43 compressions after, by intercooler 44 coolings, then by humidifier 48 humidifications.The supplying tubing 46 that the air of the moisture state behind this humidification is flowed through and is connected with the end plate 28 of fuel cell 20 is supplied to fuel cell 20.
In the present embodiment, the damping device with the hollow fiber film type is used as humidifier 48.In this humidifier 48, be provided with a plurality of hollow fiber films, make dry gas flow to the outside (it is called primary side) of hollow fiber film, make humid gas flow to the inboard (it is called secondary side) of hollow fiber film, the dry gas of humidification primary side thus.Hollow fiber film has a plurality of trickle capillaries from the inboard to the outside, and the steam of the humid gas by secondary side is because capillarity is used as the moisture sucking-off.The moisture of this sucking-off is supplied to the dry gas of primary side.
In the present embodiment, the primary side of humidifier 48 is configured on the feeding pipe, as described later, the secondary side of humidifier 48 is configured on the gas exhaust piping.The air of discharging from fuel cell 20 will be included in wherein as steam at the generation water that cathode side produces by above-mentioned electrochemical reaction, so become the gas of moisture state.By utilizing the air-out of this moisture state, air that can humidification fueling battery 20.
On the feeding pipe of this air, atmosphere pressure sensor 41 detects pressure P 1 for atmosphere outside and presses, and mass air flow sensor 42 detects air mass flow q.Detected pressure P 1 flow q is exported to control unit 120, is used for the running control of fuel cell system 10, for example is used for supplying with the control etc. of motor rotary speed of the air compressor 43 of the air capacity corresponding with requiring energy output.
On the other hand, the upstream of the air stream that gas exhaust piping is discharged from fuel cell 20 set gradually temperature sensor 55, the semiconductor-type of built-in thermistor pressure sensor 56, by the aperture of valve adjust pressure first pressure regulating valve 50, above-mentioned humidifier 48 (secondary side), have second pressure regulating valve 58 identical, and connect their exhaust pipe arrangement 51,52 etc. with first pressure regulating valve, 50 structures, be discharged to the outside from the air of fuel cell 20 discharges through exhaust pipe arrangement 51,52.
As mentioned above, on this gas exhaust piping, be provided with two pressure regulating valves 50,58.Two pressure regulating valves 50,58 are adjusted the air pressure in fuel cell 20 exits together, and the pressure of the air in the fueling battery 20 is controlled to prescribed limit.Adjustment by this outlet pressure (following this is called the outlet pressure adjustment handle), air supply suitably, and can on the dielectric film in the fuel cell 20 etc., not apply excessive load.In addition, on pressure regulating valve 50,58, use the valve body of hoist type, adjust valve opening, carry out the adjustment of pressure thus by the advance and retreat action of lift valve.The control of valve opening is carried out by control unit 120, and the anglec of rotation of the drive motor by the control lift valve is carried out.
On the gas exhaust piping of this air, temperature sensor 55 detects from the temperature T of the air of fuel cell 20 discharges, and pressure sensor 56 detects from the pressure P 2 of the air of fuel cell 20 discharges.Detected temperature T, pressure P 2 are outputed to control unit 120, use it for the control of the running of fuel cell 10.Especially, in the present embodiment, the pressure adjustment that can be used for suitably carrying out the air fed humidification of humidifier 48 is handled.So-called pressure adjustment is handled and is meant, corresponding defined terms is carried out the processing that above-mentioned outlet pressure adjustment is handled by any pressure regulating valve in two pressure regulating valves 50,58.For example, carrying out by second pressure regulating valve 58 in the downstream of humidifier 48 under the situation that the outlet pressure adjustment handle, also be adjusted to the pressure of prescribed limit in the humidifier 48, to adjust the flow of the air of discharging to the outside by humidifier inside.By adjusting the flow of the air of discharging, can improve the humidifying performance of humidifier 48 to the outside.Handle for this pressure adjustment, will describe in detail in the back.
Control unit 120 has CPU, ROM, RAM, timer, I/O port etc.In ROM, storage is used to carry out the program that above-mentioned pressure adjustment is handled, the various programs of control fuel cell system 10 integral body.CPU is installed to these programs on the RAM, handles to carry out.On I/O port, connect various transducers and various actuator.The signal that control unit 120 receives from various transducers, the operating condition of judgement vehicle is controlled various actuators.
Specifically, from above-mentioned atmosphere pressure sensor 47, pressure sensor 56, temperature sensor 55, mass air flow sensor 42, the galvanometer 95 of output system 90 described later, not shown throttle position switch, various transducers such as vehicle speed sensor, difference input pressure P1, P2, temperature T, air mass flow q, output current A, accelerator open degree θ, vehicle velocity V etc., and the corresponding output (electric power) that requires, control air compressor 43, first pressure regulating valve 50, second pressure regulating valve 58, hydrogen circulating pump 32, and the pump 72 of cooling system 70 described later etc., with running fuel cell system 10.
Like this fuel cell 20 of the fuel cell system 10 of structure except with above-mentioned hydrogen system 30, air system 40 links to each other, also links to each other with cooling system 70, gas extraction system 80, output system 90 etc.
Cooling system 70 is made of radiator 71, pump 72 and the pipe arrangement that is connected them etc., and is connected with the end plate 28 of fuel cell 20 by pipe arrangement.Because the electrochemical reaction in fuel cell 20 inside is an exothermic reaction, so temperature inside rises.The cooling water (cooling agent) that flows into fuel cell 20 in order to suppress this temperature to rise is by radiator 71 coolings and by pump 72 circulations.
Gas extraction system 80 mainly has muffler 81, is discharged to the atmosphere through muffler 81 from exhaust pipe arrangement 52 air flowing of air system 40.In addition, be included in airborne nitrogen sometimes and can leak into anode-side, and produce the nitrogen of high concentration sometimes owing to the circulation of the hydrogen in the hydrogen system 30 through dielectric film.Though not shown, gas extraction system 80 also is connected with hydrogen system 30, this nitrogen is discharged to the outside by the air dilution and at official hour.
Output system 90 is made of driving motors 92, DC/DC transducer 93 and the secondary cell 94 etc. of converter 91, vehicle.The electric power that is produced by the electrochemical reaction of the hydrogen of fueling battery 20 and air is used for the driving of the driving motors 92 of vehicle by converter 91, for example, the remainder of generations is recovered by motor 92 is used as generator when at the uniform velocity travelling or when slowing down etc., and is accumulated in the secondary cell 94 by DC/DC transducer 93.
In the fuel cell system 10 of the present embodiment of above structure, the discharge water component detection mechanism that atmosphere pressure sensor 47, temperature sensor 55, mass air flow sensor 42 (air compressor 43) and control unit 120 constitute in the request scope of the present invention.And, upstream side pressure-regulating valve in first pressure regulating valve, the 50 expressions request scope of the present invention, downstream pressure-regulating valve in second pressure regulating valve, the 58 expressions request scope of the present invention, the flow that these valves and control unit 120 constitute in the request scope of the present invention is adjusted processing mechanism.
B. the pressure adjustment of first embodiment is handled
The flow chart that Fig. 2 handles as the pressure adjustment of first embodiment of the fuel cell system 10 of present embodiment for expression.This be treated to make in fuel cell system 10 starting air compressor 43 will be from air outside fueling battery 20 after, the processing of carrying out by control unit 120.In addition, with the starting of fuel cell system 10, first pressure regulating valve 50 is set to the aperture (default value) of regulation, and the aperture of second pressure regulating valve 58 is set to standard-sized sheet.That is to say, in the early stage the stage, the outlet pressure of the air of fuel cell 20 is adjusted to prescribed limit by first pressure regulating valve 50.
When beginning to handle, control unit 120 inputs are as the pressure P 1 (step S200) of the detected value of atmosphere pressure sensor 47.Then, judge that whether the pressure P 1 of output is than the reference pressure α low (step S215) that stipulates.
Atmospheric pressure can use this atmospheric pressure to infer and increase and decrease of discharge water component, discharge water component etc. for the amount of moisture (being called the discharge water component) that is discharged in the air outside flow is brought the physical quantity of influence.Whether the determining step S215 here is following carries out, and obtains the discharge water component according to atmospheric pressure, and will be that judgement more than the ormal weight replaces with pressure and carries out to the discharge water component obtained.That is, the stipulated standard pressure alpha here is redefined for fiducial value based on the discharge water component, and is stored in the ROM of control unit 120.In addition, the reference pressure α that sets according to the discharge water component like this becomes whether the external environment condition of judging fuel cell system 10 is the reference pressure on so-called " highland ".
In step S215, pressure P 1 is lower than reference pressure α, promptly to judge atmospheric pressure lower and be equivalent under the situation of " highland " (highland condition) (step S215: be) than fiducial value judging, the aperture of first pressure regulating valve 50 is set at standard-sized sheet (step S230), carries out the outlet pressure adjustment of being undertaken by second pressure regulating valve 58 and handle (step S240).Under the situation that stage carries out being handled by the outlet pressure adjustment that first pressure regulating valve 50 is carried out, the valve of carrying out outlet pressure adjustment processing is switched in the early stage by this step.
In the outlet pressure adjustment of being carried out by second pressure regulating valve 58 is handled, carry out the outlet pressure (result is an inlet pressure) of the air of fuel cell 20 is restricted to the interior control of pressure limit of regulation.For example, when the current energy output of in control unit 120, judging fuel cell 20 when requiring energy output superfluous, control unit 120 reduces the motor rotary speed of air compressor 43, so that the flow of the air of fueling battery 20 reduces.The pressure of exhaust pipe arrangement 51 decreases.The pressure that control unit 120 is judged exhaust pipe arrangement 51 according to the pressure value P 2 of pressure sensor 56 reduces, and reduces the aperture (that is, flow path is carried out throttling) of second pressure regulating valve 58, so that the pressure value P 2 that reduces rises.
Relative therewith, when the current energy output of judging fuel cell 20 in control unit 120 was not enough, control unit 120 improved the motor rotary speed of air compressor 43, so that the flow of the air of fueling battery 20 increases.The pressure of exhaust pipe arrangement 51 rises thereupon.Control unit 120 judges that according to the pressure value P 2 of pressure sensor 56 pressure of exhaust pipe arrangement 51 rises, and increases the aperture (that is, open stream) of second pressure regulating valve 58, so that the pressure value P 2 that rises reduces.
By carrying out such processing repeatedly, control unit 120 makes the pressure in the fuel cell 20 keep certain substantially.The result that the outlet pressure adjustment is handled is, the flow of air in downstream that is discharged to humidifier 48 is by 58 restrictions of second pressure regulating valve, is configured in the pressure that pressure in the humidifier 48 of upstream side of second pressure regulating valve 58 are adjusted to the prescribed limit higher than atmospheric pressure.Carry out such processing regulation during after, flow process advances to next step.As a result, carry out above-mentioned a series of processing repeatedly at official hour.In addition, second pressure regulating valve 58 is controlled to the force value that deducts the pressure loss (crushing) of humidifier 48 from the target pressure value of the outlet of fuel cell 20.
On the other hand, in step S215, judge pressure P 1 for reference pressure α more than, promptly judge atmospheric pressure than fiducial value (step S215: not) under the high situation that is not equivalent to " highland " (highland condition), the aperture of second pressure regulating valve 58 is set at standard-sized sheet (step S260), carries out the outlet pressure adjustment of being undertaken by first pressure regulating valve 50 and handle (step S270).Under the situation that stage carries out being handled by the outlet pressure adjustment that first pressure regulating valve 50 is carried out, continue original processing in the early stage.
Similarly carry out the outlet pressure adjustment of being undertaken by first pressure regulating valve 50 with the processing of carrying out by above-mentioned second pressure regulating valve 58 and handle, the pressure in the fuel cell 20 is kept certain substantially.After during the such processing regulation of implementation, flow process advances to next step.As a result, carry out above-mentioned a series of processing repeatedly at official hour.In addition, carrying out under the situation that the outlet pressure adjustment undertaken by first pressure regulating valve 50 handles, be configured in pressure in the humidifier 48 in first pressure regulating valve, 50 downstreams not by pressure regulation, is atmospheric pressure substantially.
Handle according to the pressure adjustment of the first above embodiment, force down and be equivalent under the situation of highland condition, use second pressure regulating valve 58 in humidifier 48 downstreams to adjust pressure (adjusting the outlet pressure of air) in the fuel cells 20 at atmosphere.That is to say that control unit 120 reduces the aperture of second pressure regulating valve 58, flow path is carried out throttling, thus the pressure of the air in the fuel cell 20 is adjusted to the prescribed limit higher than atmospheric pressure.As a result, be adjusted to the authorized pressure higher than atmospheric pressure in the humidifier 48, in low with pressure (for example atmospheric pressure on highland) time, compared, and the humidification efficiency of humidifier 48 improves.When humidification efficiency improves, be used for the ratio increase of humidification by the moisture of the air of humidifier 48.In addition, when the humidification efficiency of humidifier 48 improves, when the ratio that is used for the moisture of humidification increases, therefore reduce with discharging the amount of moisture that gas discharges.
Therefore, under the environment of highland condition, compare, can suppress the amount of moisture (discharge water component) of discharging to the outside of humidifier 48 with the situation that first pressure regulating valve 50 by humidifier 48 upstream sides carries out the pressure adjustment.In other words, can suppress the reduction of the exchange efficiency of the steam in the humidifier 48,, also can carry out the humidification of air fully even under the environment of highland condition.
For example, under the environment of highland condition, adjusting under the situation of the pressure in the fuel cell 20 by first pressure regulating valve 50 of humidifier 48 upstream sides, in the humidifier 48 (strictly speaking, one side of the air flows of moisture state) pressure is reduced to about atmospheric pressure, the humidification efficiency step-down, therefore, the moisture that is used for humidification reduces, by the airborne steam vapour amount increase of humidifier 48.When directly it being discharged to the outside, a large amount of steam (moisture) can be discharged with air.According to the processing of present embodiment, after the amount of moisture (discharge water component) of judging the air of discharging from fuel cell 20 by atmospheric pressure increases to ormal weight more than, reduce the amounts of moisture of losses in the humidifier 46.Therefore, even fuel cell system 10 turns round, also can guarantee the appropriate humidification of water balance under the lower highland condition of atmospheric pressure, thereby can suppress the performance decrease of fuel cell 20.
In addition, under the situation that is not equivalent to the highland condition, handle though carry out the outlet pressure adjustment at humidifier 48 upstream side places,, in this case, because the humidifying performance of humidifier 48 can not reduce significantly, so can carry out appropriate humidification.In this case, handle, can improve the response of outlet pressure adjustment in handling thus by carrying out the outlet pressure adjustment near the pressure regulating valve (first pressure regulating valve 50) at the air outlet slit place of fuel cell 20.In addition, for whether being equivalent to the highland condition, in the present embodiment, use is judged by the atmosphere pressure sensor 47 detected atmospheric pressure of the introducing side that is arranged on air, but, also the pressure of the discharge gas of humidifier 48 can be detected as a kind of of its quantity of state, and be setting when following, be judged as the highland condition at this pressure.And, judge that by obtain altitude information by devices such as automobile navigations the highland condition is also harmless.As the quantity of state of discharging gas, illustrated in embodiment, the modified example as described later, can consider to discharge the temperature, flow (by the flow velocity replacement) of gas etc.
In the present embodiment, though with solid polymer membrane as dielectric film,, so long as under the moisture state of prescribed limit the dielectric film of works fine, any dielectric film can.So long as comprise the fuel cell with this dielectric film, the fuel cell system that reaches the air fed humidifier of moisture humidification in the utilization discharge gas, appropriate humidification is handled, is carried out in the pressure adjustment that can both be suitable for present embodiment.
C. the pressure adjustment of second embodiment is handled
In the pressure adjustment of first embodiment is handled, though with the atmospheric pressure is that benchmark judges that the discharge water component of discharging from humidifier 48 increases to more than the ormal weight, but, in the pressure adjustment of second embodiment is handled, be that benchmark is judged with the outlet temperature of fuel cell 20.That is to say, the pressure adjustment of second embodiment is handled on the judgment processing of the increase of amount of moisture different with the pressure adjustment processing of first embodiment, and other processing (being handled by the outlet pressure adjustment that any pressure regulating valve carries out) is handled identical with the pressure adjustment of first embodiment.Therefore, the part that the outlet pressure adjustment is handled describes simply.In addition, it is basic identical with fuel cell system 10 shown in Figure 1 to carry out the hardware configuration that the pressure adjustment of second embodiment handles, so omits its explanation.
Fig. 3 represents the flow chart as the pressure adjustment processing of second embodiment of the fuel cell system 10 of present embodiment.This processing is stored in as handling procedure in the ROM of control unit 120, CPU read routine in the ROM, and it is installed on the RAM, handle to carry out.
When beginning to handle, the detected value of control unit 120 input temp transducers 55 is the outlet temperature T (step S300) of the air of fuel cell 20.Then, judge that whether the outlet temperature T is than the fiducial temperature β height of stipulating (step S315).
Identical with the atmospheric situation of first embodiment, the outlet temperature of the air of fuel cell 20 can be used this outlet temperature to infer and increase and decrease of discharge water component, discharge water component etc. for the discharge water component is brought the physical quantity of influence.Whether the determining step S315 here is following carries out: obtain the discharge water component according to outlet temperature, and will be that judgement more than the ormal weight replaces with temperature to the discharge water component obtained.That is, the stipulated standard temperature ss here is redefined for fiducial value based on the discharge water component, and is stored in the ROM of control unit 120.
In step S315, be judged as outlet temperature T than fiducial temperature β height, promptly judge under the situation that the steam that comprises in the air increases (step S315: be), the aperture of first pressure regulating valve 50 is set at standard-sized sheet (step S330), carry out the outlet pressure adjustment of specified time limit by second pressure regulating valve 58 and handle (step S340), advance to next step then.As a result, carry out above-mentioned a series of processing repeatedly at official hour.It is identical that the step S230, the S240 that handle with the pressure adjustment of first embodiment shown in Figure 2 are handled in this outlet pressure adjustment.
On the other hand, in step S315, be judged as outlet temperature T lower than fiducial temperature β, promptly judge (step S315: not) under the situation that the steam that comprises in the air do not increase, the aperture of second pressure regulating valve 58 is set at standard-sized sheet (step S360), carry out the outlet pressure adjustment of specified time limit by first pressure regulating valve 50 and handle (step S370), advance to next step then.As a result, carry out above-mentioned a series of processing repeatedly at official hour.It is identical that the step S260, the S270 that handle with the pressure adjustment of first embodiment shown in Figure 2 are handled in this outlet pressure adjustment.
Handle according to the pressure adjustment of the second above embodiment, higher at outlet temperature T, be included under the situation that airborne steam increases, carry out the outlet pressure adjustment of being undertaken by second pressure regulating valve 58, the flow of the air that restriction is discharged to humidifier 48 downstreams.Therefore, handle identically, can suppress amount of moisture (discharge water component), thereby can carry out the appropriate humidification that undertaken by humidifier 48 to the discharge of the outside of humidifier 48 with the pressure adjustment of first embodiment.
And in the control of fuel cell system 10, general what detect is the physical quantity of reacting gass such as outlet temperature T of the air of fuel cell 20.Handle by this physical quantity being used for the pressure adjustment, can construct out system with comparalive ease.In addition,, replace outlet temperature T, also can use the flow q of the air of fueling battery 20 judging that the discharge water component increases to ormal weight when above.
In this case, replace step S300, the S315 of Fig. 2, the detected value (flow q) that control unit 120 also can input air flowmeter 42 compares flow q and specified reference value.Under flow q surpasses the situation of specified reference value, the outlet pressure adjustment of being undertaken by second pressure regulating valve 58 of steps performed S330 and S340; Surpass under the situation of specified reference value the outlet pressure adjustment of being undertaken by first pressure regulating valve 50 of steps performed S360 and S370 at flow q.
That is to say that under the supply flow rate q of time per unit increased to situation above the stipulated standard value, the flow velocity that is judged as the air of discharging from fuel cell 20 also increased, the humidifying performance of humidifier 48 reduces.Identical with first, second embodiment, this stipulated standard value also is the fiducial value of setting according to the discharge water component.
In this case, handle the flow of the air that restriction is discharged to the downstream of humidifier 48 by the outlet pressure adjustment that second pressure regulating valve of carrying out by humidifier 48 downstreams 58 carries out.By doing like this, compare with the situation of using first pressure regulating valve 50 to carry out pressure adjustment processing, can reduce the amount of moisture (discharge water component) of discharging to the outside of humidifier 48.In addition, also can infer the flow (gas pushing quantity) of the air of supplying with according to the motor rotary speed of air compressor 43.
D. variation
More than, though embodiments of the invention are illustrated, the present invention is not limited to these embodiment certainly, under the scope that does not break away from spirit of the present invention, can implement the present invention with various forms.In the present embodiment, when setting specified reference value (α, β),, not necessarily leave no choice but obtain discharge water component itself though ask the discharge water component according to physical quantitys such as atmospheric pressure, outlet temperatures.For example, even do not know discharge water component itself, if learn by experiment between physical quantity and the discharge water component closely related, also can setting pressure or the fiducial value of temperature.
In the present embodiment, though be that boundary limits the flow of discharging to humidifier 48 downstreams with the specified reference value, also can followingly control, that is, the discharge water component is big more, the limited degree of flow big more (Linear Control).For example, using under the atmospheric situation, can corresponding detected force value preestablishing the flow of restriction.
In the present embodiment, atmospheric pressure, outlet temperature or air fed gas pushing quantity etc. are used alone as judgment standard respectively, but also they whole inputs if satisfy any condition, can be handled with regard to carrying out the outlet pressure adjustment of being undertaken by the pressure regulating valve that is arranged on the humidifier downstream.
And, handle and during the pressure adjustment of second embodiment handles in the pressure adjustment of first embodiment, though determine that according to atmospheric pressure or outlet temperature (perhaps air fed gas pushing quantity) which in two pressure regulating valves in the upstream that is arranged on humidifier, downstream to carry out the outlet pressure adjustment by handles, but, also can consider to determine to carry out the pressure regulating valve that the outlet pressure adjustment is handled by the fuel cell required humidification amount that requires of suitably generating electricity.
The flow chart that Fig. 4 handles for the pressure adjustment that adds the judgment processing that requires the humidification amount in the pressure adjustment of first embodiment is handled.This handles identical with the pressure adjustment processing of second embodiment shown in Figure 2, is carried out by control unit 120.In addition, handling in the identical processing, use identical step numbers with the pressure adjustment of first embodiment.
When beginning to handle, control unit 120 inputs judge that as atmospheric pressure P 1 (step S200) whether atmospheric pressure is than fiducial value low (step S215).In step S215, when judging atmospheric pressure is (step S215: in the time of not) more than the fiducial value, make second pressure regulating valve, 58 standard-sized sheets (step S260), carry out the outlet pressure adjustment of specified time limit by first pressure regulating valve 50 and handle (step S270), advance to next step then.That is, during regulation, carry out the outlet pressure adjustment at the upstream side of humidifier 48 and handle.The result who advances to next step is to carry out above-mentioned a series of processing repeatedly at official hour.
Relative therewith, in step S215, when judging atmospheric pressure, calculate the humidification amount (step S420) that requires according to the detected value of various transducers than fiducial value low (step S215: be).
Specifically, calculate air fed amount according to the detected value of mass air flow sensor 42, calculate the consumption of the oxygen in the electrochemical reaction, the water yield of generation according to the detected value of galvanometer 95, aperture according to temperature sensor 55, pressure sensor 56, pressure regulating valve 50,58 is calculated the flow of the air of discharge, obtains the amount of moisture of possessing of air in the current fuel cell 20 according to these values of calculating.This mapping of possessing the amount of moisture that amount of moisture and corresponding energy output in advance set is compared, calculate the required humidification amount that requires of suitably generating electricity.
Whether what then, control unit 120 judgements were obtained like this requires the humidification amount than setting γ big (step S425).
In step S425, when judging when requiring the humidification amount than setting γ big (step S425: be), make first pressure regulating valve, 50 standard-sized sheets (step S230), carry out the outlet pressure adjustment of specified time limit by second pressure regulating valve 58 and handle (step S240), advance to next step then.That is, during regulation, carry out the outlet pressure adjustment in the downstream of humidifier 48 and handle.The result who advances to next step is to carry out above-mentioned a series of processing repeatedly at official hour.
On the other hand, in step S425, to require the humidification amount be (step S425: in the time of not), make second pressure regulating valve, 58 standard-sized sheets (step S260) below the setting γ when judging, carry out the outlet pressure adjustment of specified time limit by first pressure regulating valve 50 and handle (step S270), advance to next step then.That is, during regulation, carry out the outlet pressure adjustment at the upstream side of humidifier 48 and handle.The result who advances to next step is to carry out above-mentioned a series of processing repeatedly at official hour.
Handle according to above pressure adjustment,, under the humidification amount that requires is situation below the setting, also can carries out the outlet pressure adjustment and handle at the upstream side of humidifier 48 even it is lower and be equivalent to the highland condition to judge atmospheric pressure.Just, increase to more than the ormal weight even judge the discharge water component, because required humidification amount is below the ormal weight in the current fuel cell 20, the necessity of humidification is not high yet so.In this case, pay the utmost attention to the response (controlled) of outlet pressure of the air of fuel cell 20, handle by carrying out the outlet pressure adjustment near first pressure regulating valve 50 in the exit of the air of fuel cell 20.By doing like this, can response carry out the control of outlet pressure well.
In the present embodiment, though upstream side and downstream at humidifier are provided with pressure regulating valve respectively, and use instead in the valve of the outlet pressure of the air of adjusting fuel cell in the defined terms incision, carry out the outlet pressure adjustment and handle but needn't leave no choice but switch to some valves.For example, the valve of handling basically the upstream side by humidifier in the outlet pressure adjustment carries out pressure regulation all the time, and reduce at atmospheric pressure, outlet temperature rises, the discharge water components such as flow velocity increase of the air of discharging might increase under the situation more than the ormal weight, can reduce the aperture (flow path is carried out throttling) of the valve in humidifier downstream.By doing like this, can suppress to be discharged to outside amount of moisture, thereby can suppress the reduction of the humidifying performance of humidifier.In addition, can make the control of two valves become easy.
Claims (10)
1. fuel cell system has the fuel cell that the supply of accepting regulation gas is generated electricity, and wherein, has:
Humidifier, it is arranged on the pipe arrangement pipeline from the discharge gas of described fuel cell, utilizes the moisture humidification that is included in from the discharge gas that this fuel cell is discharged to supply with at least a in the supply gas of this fuel cell;
Discharge water component detection mechanism, it is included in the described discharge gas and the detection of the discharge water component of discharging to described humidifier downstream; With
Adjust processing mechanism, it is under the situation more than the ormal weight be judged as described discharge water component according to described testing result, carries out the restriction of the described discharge water component of discharging to described humidifier downstream and handles.
2. fuel cell system as claimed in claim 1, wherein,
Described discharge water component detection mechanism is by bringing the physical quantity of influence to detect this discharge water component for described discharge water component.
3. fuel cell system as claimed in claim 2, wherein,
The press detection sensor of atmospheric pressure as described physical quantity detects in described discharge water component detection mechanism,
Described adjustment processing mechanism, under described detected atmospheric pressure was situation below the authorized pressure, being judged as described discharge water component was more than the ormal weight.
4. fuel cell system as claimed in claim 2, wherein,
Described discharge water component detection mechanism is the discharge gas that detects described fuel cell at the temperature in the exit temperature sensor as described physical quantity,
Described adjustment processing mechanism, under described detected temperature was situation more than the set point of temperature, being judged as described discharge water component was more than the ormal weight.
5. fuel cell system as claimed in claim 2, wherein,
The flow velocity of discharge gas of described fuel cell detects as the flow sensor of described physical quantity in described discharge water component detection mechanism,
Described adjustment processing mechanism, under described detected flow velocity was situation more than the setting, being judged as described discharge water component was more than the ormal weight.
6. as each described fuel cell system in the claim 2 to 5, wherein,
Described adjustment processing mechanism, downstream at the above humidifier of pipe arrangement pipeline of described discharge gas has the downstream pressure-regulating valve, this downstream pressure-regulating valve is adjusted the pressure of the supply gas in the described fuel cell by the pressure of adjusting this discharge gas, and
Carry out the pressure adjustment by described downstream pressure-regulating valve and carry out restriction to the described discharge water component in described humidifier downstream.
7. fuel cell system as claimed in claim 6, wherein,
Described adjustment processing mechanism, upstream side at the above humidifier of pipe arrangement pipeline of described discharge gas has the upstream side pressure-regulating valve, this upstream side pressure-regulating valve is adjusted the pressure of the supply gas in the described fuel cell by the pressure of adjusting this discharge gas, and
Be judged as under the situation that described discharge water component lacks than ormal weight, replacing the pressure adjustment undertaken by described downstream pressure-regulating valve, and carry out the pressure adjustment of being undertaken by described upstream side pressure-regulating valve.
8. fuel cell system as claimed in claim 7, wherein,
Also have requirement humidification amount prediction mechanism, it infers with the generating state of described fuel cell is fitted mutually and requires the humidification amount,
Described adjustment processing mechanism infers that described the humidification amount that requires that is under the situation below the setting, with described discharge water component whether be that judgement more than the ormal weight is irrelevant, all carry out the pressure adjustment of being undertaken by described upstream side pressure-regulating valve.
9. the method for operation of a fuel cell, its supply of accepting regulation gas is generated electricity, and it comprises the steps:
Supply with the supply gas of this fuel cell by being arranged on from the humidifier on the pipe arrangement pipeline of the discharge gas of described fuel cell, utilizing the moisture humidification that is included in from the discharge gas that this fuel cell is discharged;
The detection of the discharge water component that is included in the described discharge gas and discharges to described humidifier downstream; With
The described discharge water component of discharging to described humidifier downstream limits this discharge water component according to this detected discharge water component, so that can not reach more than the ormal weight.
10. fuel cell system, its hydrogen with the gas of accepting to act as a fuel and the fuel cell that generates electricity as the supply of the air of oxidizing gas wherein, have:
Humidifier, it is arranged on the pipe arrangement pipeline from the discharge gas of the described air system of described fuel cell, utilizes the moisture humidification that is included in from the discharge gas that this fuel cell is discharged to supply with the described air of this fuel cell;
Transducer, it detects atmospheric pressure, the temperature of this discharge gas and at least one in the flow as how many physical quantity corresponding of discharge water component of discharging to described humidifier downstream with being included in the described discharge gas; With
Pressure regulating valve, it is arranged on the downstream of described humidifier, and to be judged as described discharge water component in the testing result according to this transducer be under the situation more than the ormal weight, the stream of described discharge gas carried out throttling, to increase the pressure of the described discharge gas in the described humidifier.
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| JP2005155056 | 2005-05-27 | ||
| JP155056/2005 | 2005-05-27 |
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| US (1) | US20080088043A1 (en) |
| JP (1) | JP4577313B2 (en) |
| CN (1) | CN100570939C (en) |
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| JP4824853B2 (en) * | 2000-07-18 | 2011-11-30 | 本田技研工業株式会社 | Gas supply device for fuel cell |
| JP2002075418A (en) * | 2000-08-30 | 2002-03-15 | Honda Motor Co Ltd | Humidifying device for fuel cell |
| JP4672183B2 (en) * | 2001-05-23 | 2011-04-20 | 本田技研工業株式会社 | Fuel cell control device and fuel cell vehicle control device |
| JP3835357B2 (en) * | 2002-06-12 | 2006-10-18 | 株式会社デンソー | Fuel cell system |
| US20040258968A1 (en) * | 2003-03-21 | 2004-12-23 | Voss Mark G. | Cathode inlet gas humidification system and method for a fuel cell system |
| US6939633B2 (en) * | 2003-09-17 | 2005-09-06 | General Motors Corporation | Fuel cell shutdown and startup using a cathode recycle loop |
| JP2005174649A (en) * | 2003-12-09 | 2005-06-30 | Nissan Motor Co Ltd | Humidifier for fuel cell |
| JP2005347189A (en) * | 2004-06-07 | 2005-12-15 | Toyota Motor Corp | Fuel cell system |
-
2006
- 2006-05-26 CN CNB2006800186004A patent/CN100570939C/en not_active Expired - Fee Related
- 2006-05-26 DE DE112006001344T patent/DE112006001344T5/en not_active Ceased
- 2006-05-26 JP JP2006552412A patent/JP4577313B2/en not_active Expired - Fee Related
- 2006-05-26 WO PCT/JP2006/311051 patent/WO2006126746A1/en active Application Filing
-
2007
- 2007-11-27 US US11/987,069 patent/US20080088043A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104247120A (en) * | 2012-04-16 | 2014-12-24 | 本田技研工业株式会社 | Fuel cell system |
| CN104247120B (en) * | 2012-04-16 | 2016-08-24 | 本田技研工业株式会社 | Fuel cell system |
| US10249889B2 (en) | 2012-04-16 | 2019-04-02 | Honda Motor Co., Ltd. | Fuel cell system |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080088043A1 (en) | 2008-04-17 |
| JP4577313B2 (en) | 2010-11-10 |
| CN101185189A (en) | 2008-05-21 |
| JPWO2006126746A1 (en) | 2008-12-25 |
| WO2006126746A1 (en) | 2006-11-30 |
| DE112006001344T5 (en) | 2008-04-17 |
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