CN100435059C - Method for controlling power output of fuel cell - Google Patents

Method for controlling power output of fuel cell Download PDF

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Publication number
CN100435059C
CN100435059C CNB2005100751069A CN200510075106A CN100435059C CN 100435059 C CN100435059 C CN 100435059C CN B2005100751069 A CNB2005100751069 A CN B2005100751069A CN 200510075106 A CN200510075106 A CN 200510075106A CN 100435059 C CN100435059 C CN 100435059C
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China
Prior art keywords
voltage
output
fuel cell
electrode assembly
membrane electrode
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Expired - Fee Related
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CNB2005100751069A
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Chinese (zh)
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CN1877481A (en
Inventor
邓丰毅
王裕进
汤毓麟
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Shengguang Sci & Tech Co Ltd
Antig Technology Corp
Antig Technology Co Ltd
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Shengguang Sci & Tech Co Ltd
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Priority to CNB2005100751069A priority Critical patent/CN100435059C/en
Publication of CN1877481A publication Critical patent/CN1877481A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

The present invention discloses a method for controlling power output of a fuel cell, which provides a DC converter and a fuel cell, and the voltage input end of the DC converter is connected with the voltage output end of the fuel cell. The output voltage of the fuel cell is utilized by the DC converter to be converted and output to an output constant voltage. The DC converter causes the voltage input end of the DC converter to be kept within the preset range of a constant voltage, namely, the output voltage of the fuel cell is kept within the preset range of a constant voltage, wherein the voltage range value of the preset range of the constant voltage is set by the quantity of a membrane electrode assembly of the fuel cell and the voltage range value generated by the membrane electrode assembly, wherein the voltage range value is in the best power interval. The control method of the present invention causes the DC converter to provide the function of keeping the output voltage within a range of certain voltage and simultaneously make the fuel cell run all the time under the best power output state.

Description

The control method of control fuel battery power output
Technical field
The present invention relates to a kind of control method of controlling the fuel battery power output, it controls the magnitude of voltage of the voltage input end of dc voltage changer especially in regard to seeing through dc voltage changer, make it keep one and decide within the voltage range, allow fuel cell under the best power output state, operate always.
Background technology
Know the known dc voltage changer that dc voltage changer (DC Converte) for example is used for secondary cell, when design, need only consider the stability Design that voltage is decided in output usually, and do not worry that its voltage of electric power that secondary cell produces is for the influence of knowing dc voltage changer, this is the energy container of storage power because secondary cell belongs to after a kind of charging just, in use because of the discharge released energy, if and secondary cell electric weight abundance when discharge, then the output voltage of secondary cell can maintain certain voltage, so know the situation that dc voltage changer is not just worried the input voltage shakiness that it connect.Yet, fuel cell is to belong to a kind of energy converter, its energy pre-storage of not going ahead of the rest, so if the fuel cell collocation is used when knowing dc voltage changer, owing to fuel cell its magnitude of voltage of the electric power that produces can be because extraneous load have very big variation, so this moment, knowing the input voltage that dc voltage changer is still after utilizing fuel cell to change changes, still can produce an output and decide voltage though know dc voltage changer, the result who is caused allows fuel cell may not be certain to operate under the best power output state.
The inventor is because know the operator scheme that dc voltage changer can't provide the running of best power output state to fuel cell, design a kind of control method of controlling the fuel battery power output, make fuel cell under the best power output state, operate always.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of control method of controlling the fuel battery power output, allow dc voltage changer except the function that output voltage can maintain certain voltage is provided, allow fuel cell running always under the best power output state simultaneously.
In order to reach above-mentioned purpose of the present invention, the invention provides a kind of control method of controlling the fuel battery power output, comprise the following steps:
Dc voltage changer (DC Converter) and fuel cell are provided, and the voltage input end of dc voltage changer is connected with the fuel cell voltage output terminal.Dc voltage changer utilizes the output voltage of fuel cell, and conversion is output as output and decides voltage.Dc voltage changer makes the voltage input end of dc voltage changer maintain one to decide within the voltage preset range, wherein decide the voltage preset range according to the membrane electrode assembly quantity of fuel cell and the voltage range value under the membrane electrode assembly institute output best power interval, set this and decide its voltage range value of voltage preset range.Making the output voltage of described fuel cell maintain describedly decides within the voltage preset range.
Wherein, described membrane electrode assembly can be the membrane electrode assembly of a DMFC; And the voltage range value of single described membrane electrode assembly, between between 0.3V to 0.4V.The membrane electrode assembly quantity of described DMFC is N; And describedly decide the voltage preset range, between between 0.3V*N to 0.4V*N.
Described membrane electrode assembly also can be the membrane electrode assembly of a Proton Exchange Membrane Fuel Cells; And the voltage range value of single described membrane electrode assembly, between between 0.5V to 0.6V.The membrane electrode assembly quantity of described Proton Exchange Membrane Fuel Cells is N; And describedly decide the voltage preset range, between between 0.5V*N to 0.6V*N.
Described single the voltage range value of described membrane electrode assembly under output best power interval is between V ATo V BBetween.Described membrane electrode assembly quantity is N; And describedly decide the voltage preset range, between V A* N to V B* between N.
Described fuel cell is the fuel cell that utilizes the manufacturing of printed circuit board (PCB) processing procedure.
The control method of control fuel battery power output of the present invention, it sees through the magnitude of voltage that dc voltage changer is controlled the voltage input end of dc voltage changer, make it keep one and decide within the voltage range, allow fuel cell under the best power output state, operate always.
Description of drawings
Fig. 1 controls the control method process flow diagram of fuel battery power output for the present invention;
Fig. 2 is the voltage power performance diagram of its single membrane electrode assembly of the employed fuel cell of control method of the present invention;
It connects the constitutional diagram of use with fuel cell, load to Fig. 3 for the dc voltage changer of implementing control method of the present invention;
Fig. 4 is the circuit diagram according to the specific embodiment of Fig. 3.
Among the figure
10 control methods, 20 fuel cells
40 loads of 30 dc voltage changers
101,103,105 step 201 fuel battery voltage output terminals
301 dc voltage changer voltage input ends, 303 dc voltage changer voltage output ends
305A operational amplifier 305B step-down logic
305C boost logic 305D operational amplifier
Embodiment
Be familiar with this skill personage and understand purpose of the present invention, feature and effect for making,, and cooperate appended graphicly, the present invention is illustrated in detail, illustrate as the back by following specific embodiment:
Fig. 1 controls the process flow diagram of the control method of fuel battery power output for the present invention, and Fig. 2 is the voltage-power characteristic figure of its single membrane electrode assembly of the employed fuel cell of control method of the present invention.Because fuel cell 20 is equivalent to a kind of energy converter, it does not possess the ability that energy pre-storage is arranged, if fuel cell 20 uses when knowing dc voltage changer (DC Converter), and know dc voltage changer when design, usually only design is wanted to export to decide voltage, the characteristic of the input voltage that can not go to consider to originate.The voltage output value of the fuel cell 20 in the running can be along with having very big variation because of extraneous load, and referring to Fig. 2, this is the characteristic of fuel cell 20, and the voltage output value of fuel cell 20 its each membrane electrode assembly in running is if not at V ATo V BWithin the voltage range, representing that then the fuel cell 20 of this moment is not to operate under the best power output state.The dc voltage changer 20 that foundation control method 10 of the present invention is provided, it is decided voltage and offers the function of load except possessing output, still the magnitude of voltage of voltage input end can be maintained always one decides within the voltage range, can allow the voltage output value of fuel cell 20 its each membrane electrode assembly in the running, maintain V ATo V BWithin the voltage range, this fuel cell 20 of promptly representing this moment operates under the best power output state.
Control method 10 of the present invention includes step 101, step 103, step 105, is respectively described below interior literary composition.Step 101 is for providing dc voltage changer 30 (DC Converter) and fuel cell 20, and the voltage input end 301 of dc voltage changer 30 is connected with the voltage output end 201 of fuel cell 20.It connects the constitutional diagram of use with fuel cell, load to Fig. 3 for the dc voltage changer of implementing control method of the present invention.Those membrane electrode assembly of fuel cell 20 produce electric power via electrochemical reaction, it is at voltage output end 201 output voltages, and the voltage input end 301 electric property of dc voltage changer 30 are connected in voltage output end 201.
Step 103 is the output voltage that dc voltage changer 30 utilizes fuel cell 20, and conversion is output as output and decides voltage.Dc voltage changer 30 is the electric power that fuel cell 20 is produced, utilize circuitry means that its conversion is output as output and decide voltage, for example 5V decide voltage, and voltage is decided in this output is outwards exported, to offer load 40 uses via voltage output end 303.Certainly, voltage is decided in the output of dc voltage changer 30, is not limited to only export a kind of voltage of deciding, and according to the actual demand of load, dc voltage changer 30 can also be modified to possesses the abilities that voltage is decided in different outputs, and for example 5V, 12V multiple decided voltage.
Step 105 is decided within the voltage preset range for dc voltage changer 30 makes the voltage input end 301 of dc voltage changer 30 maintain one, just making the output voltage 201 of fuel cell 20 maintain this decides within the voltage preset range, wherein should decide the voltage preset range, and set this and decide its voltage range value of voltage preset range according to the membrane electrode assembly quantity of fuel cell 20 and the voltage range value under this membrane electrode assembly institute output best power interval.The voltage input end 301 of dc voltage changer 30 can maintain one and decide the voltage preset range, and this decides the voltage preset range and can allow fuel cell 20 operate within the best power interval, and this feature is the most important feature of control method 10 of the present invention.
Fig. 4 is the circuit diagram according to the specific embodiment of Fig. 3.In Fig. 4, the running of control step-down logic 305B (Buck Logic) and boost logic 305C (BoostLogic), be to feedback via the Vout_FB signal to set with the input of Vout_set signal, after the processing by operational amplifier 305A, and via the input of Vin_FB signal and Vin_set signal, after the processing by operational amplifier 305D, and then the running of control step-down logic 305B (Buck Logic) and boost logic 305C (Boost Logic), and adjust the magnitude of voltage of voltage input end 301, it is met in that step 105 is described decide within the voltage preset range.
If the words of fuel cell 20 its concrete aspect DMFCs that control method 10 of the present invention is used, and the membrane electrode assembly quantity of DMFC 20 is N, then decide the voltage preset range, and can be set between between the 0.3V*N to 0.4V*N being somebody's turn to do described in the step 105.With the technology of the membrane electrode assembly of present manufacturing DMFC 20, the voltage range value of this single membrane electrode assembly under output best power interval is between between 0.3V to 0.4V.
If the words of fuel cell 20 its concrete aspect Proton Exchange Membrane Fuel Cells that control method 10 of the present invention is used, and the membrane electrode assembly quantity of Proton Exchange Membrane Fuel Cells 20 is N, then decide the voltage preset range, and can be set between between the 0.5V*N to 0.6V*N described being somebody's turn to do of step 105.With the technology of the membrane electrode assembly of present manufacturing Proton Exchange Membrane Fuel Cells 20, the voltage range value of this single membrane electrode assembly under output best power interval is between between 0.5V to 0.6V.
Control method of the present invention can be except providing the function that output voltage can maintain certain voltage, allows fuel cell tie up to the running always of getting off of best power output state simultaneously, and this belongs to the great advantage of the present invention place.
Though the present invention discloses as above with specific embodiment; right its disclosed specific embodiment is not in order to limit the present invention; anyly be familiar with this technician; without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations; its change of doing all belongs to category of the present invention with retouching, and protection scope of the present invention is defined with the claim claim and is as the criterion.

Claims (6)

1. a control method of controlling the fuel battery power output is characterized in that, comprises the following steps:
An one direct current electric pressure converter and a fuel cell are provided, and the voltage input end of described dc voltage changer is connected with described fuel cell voltage output terminal;
Described dc voltage changer utilizes the output voltage of described fuel cell, and conversion is output as an output and decides voltage;
Described dc voltage changer utilization control step-down logical and boost logic, making the voltage input end of described dc voltage changer maintain one decides within the voltage preset range, wherein saidly decide the voltage preset range and set, make the output voltage of described fuel cell maintain and describedly decide within the voltage preset range according to the membrane electrode assembly quantity of described fuel cell and the voltage range value under the described membrane electrode assembly institute output best power interval.
2. according to the control method of the described control fuel battery power of claim 1 output, it is characterized in that described membrane electrode assembly is the membrane electrode assembly of a DMFC; And the voltage range value of single described membrane electrode assembly, between between 0.3V to 0.4V.
3. according to the control method of the described control fuel battery power of claim 2 output, it is characterized in that the membrane electrode assembly quantity of described DMFC is N; And describedly decide the voltage preset range, between between 0.3V*N to 0.4V*N.
4. according to the control method of the described control fuel battery power of claim 1 output, it is characterized in that described membrane electrode assembly is the membrane electrode assembly of a Proton Exchange Membrane Fuel Cells; And the voltage range value of single described membrane electrode assembly, between between 0.5V to 0.6V.
5. according to the control method of the described control fuel battery power of claim 4 output, it is characterized in that the membrane electrode assembly quantity of described Proton Exchange Membrane Fuel Cells is N; And describedly decide the voltage preset range, between between 0.5V*N to 0.6V*N.
6. according to the control method of the described control fuel battery power of claim 1 output, it is characterized in that described fuel cell is the fuel cell that utilizes the manufacturing of printed circuit board (PCB) processing procedure.
CNB2005100751069A 2005-06-08 2005-06-08 Method for controlling power output of fuel cell Expired - Fee Related CN100435059C (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100423405C (en) * 2005-09-15 2008-10-01 思柏科技股份有限公司 Fuel battery power output control method and application thereof
CN100452512C (en) * 2007-04-27 2009-01-14 新源动力股份有限公司 Control method and system for power output of fuel cell generation system
CN101685869B (en) * 2008-09-22 2012-05-23 新普科技股份有限公司 Device and method for stabilizing fuel battery
CN111834654B (en) * 2020-07-24 2021-09-14 上海捷氢科技有限公司 Online prediction control method and device for maximum power of proton exchange membrane fuel cell

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1333931A (en) * 1998-11-13 2002-01-30 戈尔企业控股股份有限公司 Fuel cell membrane electrode assemblies with improved power outputs
US20040106034A1 (en) * 1999-12-17 2004-06-03 Bekkedahl Timothy A. Fuel cell having a hydrophilic substrate layer
CN1531760A (en) * 2001-12-11 2004-09-22 日产自动车株式会社 Fuel cell

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1333931A (en) * 1998-11-13 2002-01-30 戈尔企业控股股份有限公司 Fuel cell membrane electrode assemblies with improved power outputs
US20040106034A1 (en) * 1999-12-17 2004-06-03 Bekkedahl Timothy A. Fuel cell having a hydrophilic substrate layer
CN1531760A (en) * 2001-12-11 2004-09-22 日产自动车株式会社 Fuel cell

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