WO2008122268A2 - Verfahren zum überprüfen der dichtheit eines brennstoffzellenstapels - Google Patents
Verfahren zum überprüfen der dichtheit eines brennstoffzellenstapels Download PDFInfo
- Publication number
- WO2008122268A2 WO2008122268A2 PCT/DE2008/000547 DE2008000547W WO2008122268A2 WO 2008122268 A2 WO2008122268 A2 WO 2008122268A2 DE 2008000547 W DE2008000547 W DE 2008000547W WO 2008122268 A2 WO2008122268 A2 WO 2008122268A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell
- voltage curve
- voltage
- evaluation
- temporal
- Prior art date
Links
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
- H01M8/04298—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
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04552—Voltage of the individual fuel cell
-
- 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
- H01M8/04664—Failure or abnormal function
- H01M8/04679—Failure or abnormal function of fuel cell stacks
-
- 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
- H01M8/04753—Pressure; Flow of fuel cell 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
-
- 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 checking the tightness of a fuel cell stack.
- the invention has for its object to provide a method for sensitive leak testing of a fuel cell stack with little effort available.
- the invention consists in a method for checking the tightness of a fuel cell stack, comprising the steps:
- the fuel cell stack is flooded in the context of this method, preferably at operating temperature for a certain period of time with operating gases.
- operating gases for this purpose, in particular air for the cathode space and Formiergas, that is 95% nitrogen with 5% hydrogen, in question.
- the cell or cell group voltages also change. If the fuel cell stack is tight, this voltage change takes place in a reproducible or predictable manner. The observation of the cell or cell group voltages can therefore provide an indication as to whether the cell stack is actually dense or which cells or cell groups have leaks.
- the evaluation of the temporal voltage curve takes into account the temporal voltage profile itself. It can also be provided that the evaluation of the temporal voltage curve takes into account the first derivation of the voltage profile after the time.
- the evaluation of the temporal voltage curve takes into account the second derivative of the voltage curve over time.
- derivatives of a higher degree can also be taken into account in the evaluation of the temporal voltage curve, although as a rule the evaluation of the temporal voltage curve itself, the first derivative of the voltage curve and possibly also the second derivative of the voltage curve are sufficient.
- the evaluation of the temporal voltage curve comprises a comparison of temporal voltage profiles of different cells or cell groups. Does the voltage curve of certain cells or cell groups differ from that of the other cells or
- the evaluation of the temporal voltage curve comprises a comparison of temporal voltage profiles with the temporal voltage profiles expected in the case of sufficient tightness.
- a specific voltage profile is to be expected after the defined change in the gas feed rate.
- empirical values offer a useful possibility for the determination of abnormalities and, to that extent, for checking the tightness of the cells.
- the invention is advantageously developed further in that at least one cell or cell group voltage is detected even before the defined changing of the gas feed rate and the defined changing of the at least one gas feed rate occurs after the at least one cell or cell group voltage is substantially constant. This may be the case, for example, after ten minutes of gas loading of the fuel cell stack at the operating temperature, taking into account the usual variations in cell voltages in assessing whether they are to be described as substantially constant.
- the defined changing of the at least one gas feed rate takes place by completely switching off at least one gas feed.
- the largest possible change is made with regard to the considered gas supply, so that a great influence on the temporal voltage curve is to be expected. Consequently, the method is particularly sensitive in this way.
- a further particularly preferred embodiment of the method according to the invention provides that the feed rates of the gases supplied to the anode chambers and to the cathode chambers are changed in a defined manner.
- a voltage value of about 680 mV which is the Ni / NiO oxidation potential, is reached continuously in both gas feeds.
- Figure 1 shows a typical course of a cell voltage over time
- Figure 2 shows different courses of cell voltages over time with complete shutdown of the gas supplies
- FIG. 6 shows different courses of cell voltages or a cell group voltage over the
- FIG. 1 shows a typical course of a cell voltage over time.
- the cell voltage waveform starts constant, at which stage the operating gases are supplied at a constant feed rate.
- time t 1 the supply of both operating gases is stopped, so that the cell voltage drops.
- This drop comes to a standstill at time t2 at about 680 mV, that is at the Ni / NiO oxidation potential in the case of a fuel cell stack with nickel anodes.
- the voltage drop can typically take about one hour. This is followed by oxidation of the nickel anodes.
- Figure 2 shows different courses of cell voltages over time with complete shutdown of the gas supplies.
- this cell voltage profile the course illustrated by a broken line is particularly noticeable.
- the voltage reaches the final constant value of about 680 mV much earlier than the other courses, so that with some probability the cell associated with this voltage curve has a leak.
- FIG. 3 shows different courses of the first derivative of cell voltages with respect to time, plotted against the voltage, with complete shutdown of the gas feeds.
- the first derivative of the cell voltage over time records the drop rate of tension. This decrease takes place with a characteristic course, whereby two areas with conspicuous maxima are characteristic. The maximum shortly before reaching the final constant voltage value is particularly striking.
- FIG. 4 shows different courses of the first derivative of cell voltages with respect to time plotted against time with complete shutdown of the gas feeds. It can be seen that some cells reach the final maximum earlier than other cells, indicating leaks in these cells.
- FIG. 5 shows various courses of the first derivative of cell group voltages with respect to time plotted against time with complete shutdown of the gas feeds. Each of these two curves is assigned to a group of three cells.
- the solid line has a course that shows no particular abnormalities. In particular, there is a termination maximum before reaching the constant cell voltage value.
- the broken line shows two maxima (M1, M2), that is, at least one cell of the associated triplet reaches the Ni / NiO oxidation potential earlier. Consequently, there is probably a leak in the area of this cell group.
- FIG. 6 shows different courses of cell voltages or a cell group voltage over time with complete shutdown of the gas feeds.
- single-cell voltages are plotted with solid lines, while the broken line shows an average of three cells.
- One of these cells is leaking. It can be seen that the mere evaluation of the cell voltage over time hardly makes it possible for the group to be conspicuous recognize, while this, as explained in connection with Figure 5, by the differential method is quite possible.
- the results show a strong dependence on the integration of the system in a test bench. It should be noted, for example, whether at least one side of the anode compartment is closed. Furthermore, it should be taken into account how long an open end of the anode compartment, that is to say the tube of the fuel gas outlet, is. Furthermore, great importance is attached to a tight interface between the fuel cell stack and the test bench.
Landscapes
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Automation & Control Theory (AREA)
- Artificial Intelligence (AREA)
- Computing Systems (AREA)
- Evolutionary Computation (AREA)
- Fuzzy Systems (AREA)
- Medical Informatics (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Fuel Cell (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002679900A CA2679900A1 (en) | 2007-04-04 | 2008-03-31 | Method for testing the impermeability of a fuel cell stack |
EA200970921A EA200970921A1 (ru) | 2007-04-04 | 2008-03-31 | Способ проверки герметичности батареи топливных элементов |
JP2009553906A JP2010521786A (ja) | 2007-04-04 | 2008-03-31 | 燃料電池スタックの不透過性を試験するための方法 |
KR1020097019441A KR20090113335A (ko) | 2007-04-04 | 2008-03-31 | 연료셀스택의 불투과성 시험 방법 |
US12/531,619 US20100062290A1 (en) | 2007-04-04 | 2008-03-31 | Method for testing the impermeability of a fuel cell stack |
BRPI0809267-2A2A BRPI0809267A2 (pt) | 2007-04-04 | 2008-03-31 | Processo para verificação da estanqueidade de uma pilha de células de combustível |
AU2008235130A AU2008235130A1 (en) | 2007-04-04 | 2008-03-31 | Method for testing the impermeability of a fuel cell stack |
EP08748721A EP2132818A2 (de) | 2007-04-04 | 2008-03-31 | Verfahren zum überprüfen der dichtheit eines brennstoffzellenstapels |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007016307.1 | 2007-04-04 | ||
DE102007016307A DE102007016307A1 (de) | 2007-04-04 | 2007-04-04 | Verfahren zum Überprüfen der Dichtheit eines Brennstoffzellenstapels |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008122268A2 true WO2008122268A2 (de) | 2008-10-16 |
WO2008122268A3 WO2008122268A3 (de) | 2009-02-05 |
Family
ID=39736170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2008/000547 WO2008122268A2 (de) | 2007-04-04 | 2008-03-31 | Verfahren zum überprüfen der dichtheit eines brennstoffzellenstapels |
Country Status (11)
Country | Link |
---|---|
US (1) | US20100062290A1 (de) |
EP (1) | EP2132818A2 (de) |
JP (1) | JP2010521786A (de) |
KR (1) | KR20090113335A (de) |
CN (1) | CN101657924A (de) |
AU (1) | AU2008235130A1 (de) |
BR (1) | BRPI0809267A2 (de) |
CA (1) | CA2679900A1 (de) |
DE (1) | DE102007016307A1 (de) |
EA (1) | EA200970921A1 (de) |
WO (1) | WO2008122268A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101706352B (zh) * | 2009-11-09 | 2011-06-01 | 卧龙电气集团股份有限公司 | 免维护电池大盖气密性检测装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103163470B (zh) * | 2011-12-19 | 2015-04-29 | 中国科学院大连化学物理研究所 | 一种一体化可再生燃料电池组可靠性检测方法 |
DE102016208434A1 (de) * | 2016-05-17 | 2017-11-23 | Volkswagen Aktiengesellschaft | Brennstoffzellensystem und Verfahren zum Überwachen eines Brennstoffzellensystems |
US11855320B2 (en) | 2022-02-25 | 2023-12-26 | Hydrogenics Corporation | Fuel leak detection in fuel cell stack |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6156447A (en) * | 1996-11-28 | 2000-12-05 | Siemens Aktiengesellschaft | Method for identifying a gas leak, and fuel cell system |
WO2002047189A1 (de) * | 2000-12-06 | 2002-06-13 | Siemens Aktiengesellschaft | Verfahren zum erkennen einer undichtigkeit in einer brennstoffzelle |
EP1279940A2 (de) * | 2001-07-26 | 2003-01-29 | Honda Giken Kogyo Kabushiki Kaisha | Verfahren zum Nachweis von Gaslecks geeignet für Brennstoffzelle |
US20040081864A1 (en) * | 2002-07-10 | 2004-04-29 | Manfred Herrmann | Method and apparatus for the investigation of a fuel cell system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4434525B2 (ja) * | 2001-07-27 | 2010-03-17 | 本田技研工業株式会社 | 燃料電池の異常検出方法 |
EP1283557A1 (de) * | 2001-08-01 | 2003-02-12 | Siemens Aktiengesellschaft | Verfahren zum Lokalisieren eines Gaslecks innerhalb einer Brennstoffzellenanordnung |
JP4222019B2 (ja) * | 2002-12-17 | 2009-02-12 | トヨタ自動車株式会社 | 燃料電池の診断方法 |
JP2004335448A (ja) * | 2003-04-17 | 2004-11-25 | Matsushita Electric Ind Co Ltd | 高分子電解質型燃料電池の運転方法 |
JP2005063724A (ja) * | 2003-08-08 | 2005-03-10 | Toyota Motor Corp | 燃料電池システム |
JP2005197211A (ja) * | 2003-12-09 | 2005-07-21 | Nissan Motor Co Ltd | 燃料電池システム |
-
2007
- 2007-04-04 DE DE102007016307A patent/DE102007016307A1/de active Granted
-
2008
- 2008-03-31 CN CN200880009366A patent/CN101657924A/zh active Pending
- 2008-03-31 WO PCT/DE2008/000547 patent/WO2008122268A2/de active Application Filing
- 2008-03-31 EA EA200970921A patent/EA200970921A1/ru unknown
- 2008-03-31 US US12/531,619 patent/US20100062290A1/en not_active Abandoned
- 2008-03-31 AU AU2008235130A patent/AU2008235130A1/en not_active Abandoned
- 2008-03-31 EP EP08748721A patent/EP2132818A2/de not_active Withdrawn
- 2008-03-31 CA CA002679900A patent/CA2679900A1/en not_active Abandoned
- 2008-03-31 BR BRPI0809267-2A2A patent/BRPI0809267A2/pt not_active Application Discontinuation
- 2008-03-31 KR KR1020097019441A patent/KR20090113335A/ko active IP Right Grant
- 2008-03-31 JP JP2009553906A patent/JP2010521786A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6156447A (en) * | 1996-11-28 | 2000-12-05 | Siemens Aktiengesellschaft | Method for identifying a gas leak, and fuel cell system |
WO2002047189A1 (de) * | 2000-12-06 | 2002-06-13 | Siemens Aktiengesellschaft | Verfahren zum erkennen einer undichtigkeit in einer brennstoffzelle |
EP1279940A2 (de) * | 2001-07-26 | 2003-01-29 | Honda Giken Kogyo Kabushiki Kaisha | Verfahren zum Nachweis von Gaslecks geeignet für Brennstoffzelle |
US20040081864A1 (en) * | 2002-07-10 | 2004-04-29 | Manfred Herrmann | Method and apparatus for the investigation of a fuel cell system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101706352B (zh) * | 2009-11-09 | 2011-06-01 | 卧龙电气集团股份有限公司 | 免维护电池大盖气密性检测装置 |
Also Published As
Publication number | Publication date |
---|---|
WO2008122268A3 (de) | 2009-02-05 |
EA200970921A1 (ru) | 2010-02-26 |
CA2679900A1 (en) | 2008-10-16 |
US20100062290A1 (en) | 2010-03-11 |
EP2132818A2 (de) | 2009-12-16 |
JP2010521786A (ja) | 2010-06-24 |
DE102007016307A1 (de) | 2008-10-09 |
BRPI0809267A2 (pt) | 2014-10-07 |
CN101657924A (zh) | 2010-02-24 |
AU2008235130A1 (en) | 2008-10-16 |
KR20090113335A (ko) | 2009-10-29 |
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