EP1779454A1 - Verfahren zum betreiben eines brennstoffzellensystems - Google Patents
Verfahren zum betreiben eines brennstoffzellensystemsInfo
- Publication number
- EP1779454A1 EP1779454A1 EP05763397A EP05763397A EP1779454A1 EP 1779454 A1 EP1779454 A1 EP 1779454A1 EP 05763397 A EP05763397 A EP 05763397A EP 05763397 A EP05763397 A EP 05763397A EP 1779454 A1 EP1779454 A1 EP 1779454A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel cell
- fuel
- cell system
- amount
- hydrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000001257 hydrogen Substances 0.000 description 25
- 229910052739 hydrogen Inorganic materials 0.000 description 25
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 22
- 239000007789 gas Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 3
- 239000010763 heavy fuel oil Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04225—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
-
- 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
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04302—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
-
- 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
-
- 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
Definitions
- the invention relates to a method for operating a fuel cell system according to the preamble of claim 1.
- Offenlegüngsschrift DE 101 40 602 A1 discloses a method in which the cold start phase of the fuel cell system is improved and thus a duration of the shortage of supply of the fuel cell is shortened by increasing the pressure build-up in the fuel cell the fuel cell system as fast as possible and rea ⁇ lome. It is dosed after completion of a cold start ei ⁇ ne larger amount of fuel in the system volume of the fuel cell system, as would correspond to the amount that would be necessary to provide the currently required electrical power rule.
- the invention has for its object to provide a method for operating a fuel cell system, with the less fuel to avoid undersupply of a fuel cell with fuel must be used and ei ⁇ ne start time of the fuel cell system can be shortened.
- an amount of fuel is metered into the fuel cell system taking into account a content of fuel stored in the fuel cell. If a larger amount of fuel is metered into an anode-side volume of the Brennstoffzel ⁇ lens system in the startup phase to avoid a deficiency of the fuel cell with fuel, as would correspond to the amount that would be necessary to provide a currently required electrical power, the actually supplied Men ⁇ the fuel to the current, stored in the fuel cell content can be reduced.
- the fuel used is preferably hydrogen or a hydrogen-rich gas ein ⁇ . Furthermore, the starting phase of the fuel cell system can be shortened during a restart.
- the content of stored fuel is determined by a determination of an electrical voltage at the fuel cell, a precise and simple estimation of the available and the required amount of fuel can be made.
- hydrogen or a hydrogen-rich gas is used as the fuel. Since the fuel cell is capacitively charged with hydrogen during its operation and its amount slowly decreases after the fuel cell has been switched off, the fuel cell, after switching off, has an electrical residual voltage which decreases with time in proportion to the content of the stored hydrogen.
- the starting phase can therefore be shortened advantageous.
- the metered amount of fuel can recirculated anode gas from the anode loop.
- the Dosie ⁇ tion can be done either active or passive. If it is active, for example, a pump can be used, the pump is operated at high residual voltage with a correspondingly reduced pump power and low residual voltage with a correspondingly increased pump power. This contributes to an improvement in the efficiency of the fuel cell system.
- a time course of the fuel cell residual voltage is observed after the fuel cell system has been switched off, with metering of fuel occurring when the fuel cell system is switched on or switched on as a function of the time profile of the fuel cell residual voltage.
- the FIGURE schematically shows a profile of a fuel cell residual voltage when the fuel cell system is switched off over time in connection with an amount of excess fuel to be metered in when the fuel cell system is restarted.
- the invention is preferably used in a fuel cell vehicle.
- the fuel cell system may provide drive of the vehicle with drive power, or the fuel cell system may additionally or alternatively be set as an auxiliary power source for the supply of electrical loads independently of a drive of the vehicle ein ⁇ .
- the fuel cell system comprises a fuel cell which is composed of a plurality of individual cells, which are electrically connected in series and / or in parallel in order to be able to deliver a sufficient electrical power.
- the fuel cell system is switched off at a time to, because there is no current requirement, ie the supply of the fuel cell with hydrogen as the reducing agent and oxygen as the oxidizing agent is interrupted.
- the electrical voltage U of the fuel cell then drops with time t.
- the course of the electrical voltage U of the fuel cell after switching off corresponds to a time-dependent residual fuel cell voltage which is produced by hydrogen stored in the fuel cell during operation, the hydrogen being charged with hydrogen during operation. If the fuel cell is switched off, the fuel cell releases this hydrogen again, and the residual fuel cell voltage decreases with time to zero.
- the hydrogen still present in the fuel cell can be used. If, when starting the fuel cell system, its fuel cell anode side is purged with hydrogen in order to avoid undersupplying the fuel cell with hydrogen, a quantity reduced by the amount of hydrogen present in the fuel cell can be used to rinse the anode side. Based on the total amount of water So Stoffs less hydrogen must be supplied, and this can be done in less time.
- the amount of hydrogen in the fuel cell system is metered in a starting phase when starting or restarting the fuel cell system, taking into account the content of hydrogen stored in the fuel cell.
- the content of stored hydrogen is determined by a determination of the electrical voltage U at the fuel cell when the fuel cell system is switched off.
- a quantitative correlation between residual fuel cell voltage and the amount of hydrogen in the fuel cell can be determined beforehand by measurement series and / or modeling, and is available in operation in a memory of a control unit, for example.
- the metering can take place as a function of a cooling water temperature of the fuel cell.
Landscapes
- 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
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004037097A DE102004037097A1 (de) | 2004-07-30 | 2004-07-30 | Verfahren zum Betreiben eines Brennstoffzellensystems |
| PCT/EP2005/007477 WO2006012976A1 (de) | 2004-07-30 | 2005-07-11 | Verfahren zum betreiben eines brennstoffzellensystems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1779454A1 true EP1779454A1 (de) | 2007-05-02 |
Family
ID=35058596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05763397A Withdrawn EP1779454A1 (de) | 2004-07-30 | 2005-07-11 | Verfahren zum betreiben eines brennstoffzellensystems |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1779454A1 (de) |
| JP (1) | JP2008508666A (de) |
| DE (1) | DE102004037097A1 (de) |
| WO (1) | WO2006012976A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007048317B4 (de) | 2007-10-09 | 2025-04-03 | Cellcentric Gmbh & Co. Kg | Verfahren zum Betreiben eines Brennstoffzellensystems |
| JP6112882B2 (ja) | 2013-01-29 | 2017-04-12 | 本田技研工業株式会社 | 燃料電池システムの起動方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3812812C1 (de) * | 1988-04-16 | 1989-10-19 | Mtu Friedrichshafen Gmbh | |
| JP4049833B2 (ja) * | 1996-07-26 | 2008-02-20 | トヨタ自動車株式会社 | 電源装置および電気自動車 |
| JP4713758B2 (ja) * | 2001-05-01 | 2011-06-29 | 本田技研工業株式会社 | 燃料電池発電システム及びその運転方法 |
| DE10140602A1 (de) * | 2001-08-18 | 2003-03-20 | Ballard Power Systems | Verfahren zum Druckaufbau in einer Brennstoffzellenanlage |
| DE10201930A1 (de) * | 2002-01-19 | 2003-08-14 | Daimler Chrysler Ag | Kraftfahrzeug mit einer Brennkraftmaschine und einem Brennstoffzellensystem |
| US6873157B2 (en) * | 2002-04-04 | 2005-03-29 | Metallic Power, Inc. | Method of and system for determining the remaining energy in a metal fuel cell |
| JP3915681B2 (ja) * | 2002-12-03 | 2007-05-16 | 日産自動車株式会社 | 燃料電池システム |
| JP4811626B2 (ja) * | 2003-08-25 | 2011-11-09 | トヨタ自動車株式会社 | 車両用の燃料電池システム及び電気自動車 |
-
2004
- 2004-07-30 DE DE102004037097A patent/DE102004037097A1/de not_active Withdrawn
-
2005
- 2005-07-11 JP JP2007522956A patent/JP2008508666A/ja not_active Abandoned
- 2005-07-11 WO PCT/EP2005/007477 patent/WO2006012976A1/de not_active Ceased
- 2005-07-11 EP EP05763397A patent/EP1779454A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006012976A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004037097A1 (de) | 2006-03-23 |
| WO2006012976A1 (de) | 2006-02-09 |
| JP2008508666A (ja) | 2008-03-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20070201 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: POST, GERALD Inventor name: KURRLE, MICHAEL Inventor name: SCHEMPP, VOLKER Inventor name: LEDERBOGEN, MATTHIAS |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DAIMLER AG |
|
| 17Q | First examination report despatched |
Effective date: 20080530 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Effective date: 20100301 |