WO2006132393A1 - 異常判定装置 - Google Patents
異常判定装置 Download PDFInfo
- Publication number
- WO2006132393A1 WO2006132393A1 PCT/JP2006/311688 JP2006311688W WO2006132393A1 WO 2006132393 A1 WO2006132393 A1 WO 2006132393A1 JP 2006311688 W JP2006311688 W JP 2006311688W WO 2006132393 A1 WO2006132393 A1 WO 2006132393A1
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- WO
- WIPO (PCT)
- Prior art keywords
- abnormality
- abnormality determination
- pressure
- fuel cell
- fuel
- Prior art date
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Classifications
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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
- H01M8/04313—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
- B60L58/33—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—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
- H01M8/04425—Pressure; Ambient pressure; Flow at auxiliary devices, e.g. reformers, compressors, burners
-
- 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
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
Definitions
- the present invention relates to an abnormality determination device such as a fuel cell system, and more particularly to a technique for improving determination accuracy.
- the pressure in the closed space of the fuel gas circulation supply system is detected by a pressure gauge, and the detection result of the pressure gauge is a speed exceeding the reference.
- a gas leak detection device configured to determine the occurrence of fuel gas leak when a pressure drop is indicated is described.
- abnormal system status may be measured due to malfunction of components that affect the system status. For example, there is a possibility that the shutoff valve is not open properly, the manual valve is defective, or the filter or piping is clogged.
- an object of the present invention is to provide an abnormality determination device capable of detecting an abnormal state of a system with high accuracy and obtaining an accurate result.
- the present invention comprises a plurality of abnormality determination means for determining system abnormality, and it is determined that the system is abnormal when the abnormality is determined by the plurality of abnormality determination means. .
- a plurality of abnormality determination means are provided, and a system abnormality is determined only when it is determined that there is an abnormality by not only one but a plurality of abnormality determination means. For this reason, if a local abnormality state is determined by one abnormality determination means, even if there is a failure, the abnormality alone is not the final determination, and other abnormality determinations are performed at least once. This makes it possible to determine abnormalities with high accuracy.
- the plurality of abnormality determination means have different detection devices for detecting the system state.
- an abnormal level of system status may be detected due to the location of the detection device or a malfunction.
- the plurality of detection devices may operate based on the same detection principle. For example, this is a case where each of the detection devices is a pressure sensor that detects pressure. Further, it is preferable that the plurality of detection devices operate based on different detection principles.
- the detection principle is the same, it may be affected by the same local factors when the position of the inspection device is close, but if the detection principle of the detection device is different, the local factor will be one side. This is because there is a high possibility of acting only on the skin.
- one of the detection devices is a gas concentration sensor and the rest is a pressure sensor.
- the plurality of abnormality determination means have different procedures for determining a system abnormality. One of the cases where it is erroneously detected that it is normal in spite of normality may be that malfunction or defect has occurred in any component (part) of the system. If there is a difference, there is a high possibility that different components will be used for anomaly determination, and the impact on the anomaly determination of one component can be reduced.
- the present invention includes a first detection device and a second detection device, the first detection device includes a detection unit outside the fuel cell system, and the second detection device includes a fuel cell system. It can comprise so that a detection part may be provided in this gas piping.
- the determination is made by combining the abnormality determination outside the system and the abnormality inside the gas pipe inside the system. Therefore, if an abnormality actually occurs, it can be detected outside the system or inside the system. In both cases, if an abnormality is detected, if it is determined that only one of them is abnormal, it can be assumed that the abnormality was erroneously determined for other reasons. Therefore, the arrangement of such detection devices is advantageous for correctly determining an abnormality regardless of a local abnormal state.
- the present invention provides a first normal determination means for determining a system abnormality
- the first abnormality determination means is a second abnormality determination means in which at least one of the detection device and the abnormality determination procedure is different, and an abnormality is determined by the first abnormality determination means.
- a determination unit that performs an abnormality determination by the second abnormality determination unit when the determination is made, and determines that the system is abnormal when the second abnormality determination unit also determines that the abnormality has occurred. .
- the first and second abnormality determination means differ in either the detection device or the determination procedure.
- an abnormal state is detected at the location, or a failure or malfunction occurs.
- abnormal states are detected due to malfunctions or defects in system components.
- other detection devices and determination procedures are always used. Therefore, erroneous determination can be minimized and highly accurate abnormality determination can be performed.
- the present invention provides the first abnormality determination means as
- a detection device for detecting a fuel gas concentration outside the fuel pond system; and b) a first determination device for determining that the fuel gas concentration detected by the detection device is abnormal when the fuel gas concentration detected by the detection device exceeds a predetermined value.
- sealing means for sealing the pressure of the fuel gas piping
- the determination means When the first determination device determines that the determination means is abnormal, the determination means The abnormality determination means is activated.
- the second abnormality determination means when the first abnormality determination means determines that an abnormality occurs when the fuel gas concentration is high, the second abnormality determination means is further activated to change the pressure of the sealed fuel gas pipe.
- the system is judged to be abnormal for the first time when is large. Therefore, even if there is very local fuel gas stagnation and the first abnormality determination means determines that there is an abnormality, there is no abnormality in the pressure drop in the fuel gas piping, so that erroneous determination can be prevented. If there is a gas leak from the actual fuel gas pipe and an external fuel gas concentration abnormality occurs, an abnormal pressure drop in the fuel gas pipe will also occur, so the gas leak judgment will be performed correctly.
- the present invention provides the first abnormality determination means as
- sealing means for sealing the pressure of the fuel gas piping
- g) includes a first determination device that determines that the fuel gas pipe sealed by the sealing means is abnormal when the pressure change in the fuel gas pipe exceeds a predetermined value
- the second abnormality determining means when the first abnormality determining means determines that an abnormality is detected from the pressure drop of the fuel gas pipe, the second abnormality determining means is further activated, and the pressure in a state where the power generation amount is limited.
- the first abnormality determination means is abnormal due to pressure fluctuations that normally occur in the fuel gas piping during the operation of fuel cell auxiliary equipment. Even if it is determined that the pressure is not abnormal, it is possible to prevent erroneous determination because the pressure is not in an abnormal state by excluding the pressure fluctuation factor by the second abnormality determination means. If a pressure drop is observed due to a gas leak from the fuel gas piping, the pressure in the state where the amount of power generation is limited is abnormally reduced. Is done.
- the misjudgment may be due to malfunction of system components, and individual components may return to normal when they are restarted, that is, refreshed. According to this configuration, when it is determined that there is an abnormality once, the components related to such an abnormality determination are refreshed. Therefore, the operation is returned to normal in the second abnormality determination, and 'Can be prevented from being erroneously determined.
- “Refreshing” refers to, for example, when a component is a valve, it is opened and closed and shaken.
- the determination means preferably stops the fuel cell system when the second abnormality determination means determines that there is an abnormality. This is because it is appropriate to stop the system because the probability of a system abnormality is extremely high if it is determined as abnormal by the second abnormality determination means.
- FIG. 2 is a flowchart showing the principle of the abnormality determination method of the present invention.
- FIG. 3 is a system block diagram of the fuel cell system according to the first embodiment.
- FIG. 4 is a flowchart for explaining the abnormality determination method according to the first embodiment.
- FIG. 5 is a flowchart illustrating the abnormality determination method according to the second embodiment.
- FIG. 6 is a system block diagram of the fuel cell system of Embodiment 3.
- FIG. 7 is a system block diagram of the fuel cell system of Embodiment 4.
- FIG. 8 is a flowchart for explaining the abnormality determination method according to the fourth embodiment.
- the abnormality determination device 101 of the present invention includes a plurality of abnormality determination means 1 10, 1 2.0,... 1 n 0 (n is a natural number), and a plurality of abnormality determination means.
- the system is configured to determine that the system is abnormal when it is determined to be abnormal.
- Each abnormality determining means 110, 120,... 1n0 is provided with detection devices 1 1 1, 121,..., Lnl, respectively, and detects the system state of the inspection target system SYS.
- Each abnormality judgment means 1 10, 120, ... 1 n 0 judges whether or not the detected system status is abnormal by its own judgment procedure 1 1 2, • 122, ..., 1 n 2 And as a conclusion in the abnormality judgment means Whether it is normal (OK) or abnormal (NG) is output.
- the determination means 1 0 2 inputs the determination results from the plurality of abnormality determination means 1 1 0, 1 2 0, ... 1 n 0, and it is determined that there is an abnormality by any of the plurality of abnormality determination means. When this happens, a system error (NG) is output as the final judgment, and otherwise normal (OK) is output.
- each detection device has a different detection principle.
- the detection principle differs between detection of gas concentration and detection of gas pressure. You may comprise so that the physical value to detect may differ. If the detection principle is the same among multiple detection devices, the influence of one factor acting on one detection device may affect other inspection devices. In this respect, if the detection principle of the detection device is different, there is a high possibility that a factor that acts on only one detection device will not work on a detection device based on another detection principle.
- one of the detection devices is a gas concentration sensor and the rest is a pressure sensor.
- the detection principle may be the same among a plurality of detection devices (for example, in the case of the same concentration sensor), but the location (installation position) may be different. This is because, if the location of the detection device is different, local state value anomalies at a location do not reach multiple detection devices.
- the detection principle may be the same among a plurality of detection devices, and a plurality of detection devices having the same installation position may be used. This is because a failure that occurs in one detector is unlikely to occur simultaneously in another detector.
- the determination procedures 1 1 2, 1 2 2,..., 1 n 2 in each abnormality determination means are different from each other.
- abnormality determination is performed using or affected by any component (part) of the inspection target system SYS.
- a component may be malfunctioning or defective.
- the judgment procedures If they are different, there is a high possibility that different components will be used or affected by different components to determine the anomaly. Therefore, the influence of a specific component on anomaly judgment is reduced, and the degree of influence when there is a problem with that specific component can be reduced.
- FIG. 2 shows a flowchart when abnormality determination is performed in order.
- the first abnormality determination process is performed by the first abnormality determination unit 110 in the abnormality determination unit 110 (S1).
- the detection device 1 1 1 reads the system status of the system SYS to be detected, and determines whether this system status is abnormal or normal according to the determination procedure 112. As a result, if it is determined that the system status is normal (S 2: NO), the subsequent processing is omitted. If the result of this determination processing is determined to be abnormal (S 2: YES), then the second The abnormality determination process is started.
- the second abnormality determination process is performed by the abnormality determination means 120 different from the abnormality determination means 110 (S3). Similar to the first abnormality determination process, the detection device 122 reads the system state of the inspection target system SYS. This detection device 121 is different from the detection device 11 1 1 in its detection principle or Z and installation position. Then, it is determined whether the read system state is abnormal or normal according to determination procedure 122. This determination procedure 122 is different from the determination procedure 1 ⁇ 2 described above, and is determined by cooperating different components. As a result, if it is determined that the system status is normal (S4: NO), the subsequent processing is omitted. If the result of this determination processing is determined to be abnormal (S4: YES), then the third and subsequent Abnormality determination processing is started.
- the abnormality determination means related to this nth abnormality determination process is the detection device 1n0 in the detection device 1n1 and the system status of the system SYS to be detected Is read and it is determined whether the system status is abnormal or normal according to the determination procedure 1 n 2.
- This result system If it is determined that the condition is normal (S6: NO), it is finally determined to be normal, but if the result of this determination process is determined to be abnormal (S6: YES), here The system is determined to be abnormal for the first time, and temporary measures are taken in response to the abnormality (S7).
- the abnormality determination device 101 is determined to have abnormal determination results from two or more of the plurality of abnormality determination means 1 10, 1 2 0,..., 1 n 0. In some cases, it can be a system error.
- the number of abnormality judgment means to be used can be determined by the balance between the accuracy required of the inspection target system SYS and the inspection possible time. In practical use, it is almost always sufficient to use two abnormality determination means, and when both abnormality determination means determine that both are abnormal, a system abnormality is sufficient.
- the first abnormality determination means 1 1 0 determines that there is an abnormality.
- the determination means 102 performs the abnormality determination by the second abnormality determination means 120, and if the abnormality is also determined by the second abnormality determination means 120, it is determined that the system abnormality has occurred. It will be.
- the abnormality alone is not a final determination, and unless it is determined as abnormal by the other abnormality determination means. Since it does not become a system abnormality, it is possible to make a highly accurate abnormality determination without any erroneous determination.
- first abnormality judgment means 1 10 and the second abnormality judgment means 1 20 differ in either detection device 1 1 1-1 21 or judgment procedure 1 1 2 or 1 22, In the detection device, even if an abnormal state is detected at the location, or a failure or malfunction occurs, an abnormal state is detected due to malfunction or defect of system components in one judgment procedure. However, since other detection devices and judgment procedures are always used, the number of erroneous judgments is minimized. It is possible to eliminate. In the following embodiments, some of the combinations of the present invention based on such principles will be exemplified.
- Embodiment 1 of the present invention relates to a fuel cell system 200 mounted on an automobile as a moving body, and relates to hydrogen gas (fuel gas; boil-off gas) generated from liquid hydrogen as liquid fuel and liquid hydrogen as gaseous fuel. )
- hydrogen gas fuel gas; boil-off gas
- the first embodiment is an example of a configuration of an abnormality determination device that performs the first abnormality determination process based on the detected hydrogen gas concentration and the second abnormality determination process based on the detected pressure of the fuel gas pipe. is there.
- FIG. 1 shows a system block diagram of a fuel cell system 200 including the abnormality determination device of the present invention.
- the fuel cell system 200 includes a hydrogen gas supply system 1 that supplies hydrogen gas to the fuel cell 100, an air supply system 2 that supplies air, which is an oxidizing gas, A control unit 3 that controls the fuel cell system 200 and a power system 4 that charges and discharges the power generated by the fuel cell 100 are provided.
- the hydrogen gas supply system 1 includes a fuel filling pipe 10, a fuel tank 1 1 to 1 4, a tank connecting pipe 1 5, a fuel gas pipe 1 6, a gas-liquid separator 1 7, and a circulation pump 1 8. Yes.
- a relief valve to reduce the internal pressure when the internal pressure rises to a certain value a check valve to prevent backflow of hydrogen gas, a manual valve that is manually opened and closed for adjustment, a filter to filter impurities, etc. Illustration or signing is omitted.
- the fuel tanks 1 1 to 14 have a vacuum double structure, can store liquid hydrogen with a very low boiling point (approximately 20 K), and also use hydrogen gas (boil-off gas) generated from liquid hydrogen. It has a pressure-resistant structure that can store up to a certain high pressure.
- Each of the fuel tanks 11 to 14 is provided with temperature sensors tl to t 4 for measuring the temperature of the internal hydrogen gas.
- Fuel filling pipe 1 0 Is a high-pressure pipe that connects the fuel filling port FI and each fuel tank 11 to 14 in parallel.
- Each fuel tank is provided with a filter, a manual valve, and multiple check valves, allowing filtration and backflow prevention of the supplied liquid fuel.
- shutoff valve G 1 to G 4 From each fuel tank 1 1 to 1 4, hydrogen gas is supplied to the fuel gas piping 1 5 via the filter, shutoff valve G 1 to G 4, manual valve, pressure regulator (regulator) R 1 to 'R 4 They are supplied in parallel. Impurities inside the tank are filtered by the filter.
- the shut-off valves G1 to G4 are each configured to be controllable to be opened and closed by the control unit 3, and the internal hydrogen gas is supplied when the valves are opened.
- the pressure regulating valves R 1 to R 4. supply high-pressure primary-side hydrogen gas while reducing the pressure to a constant secondary-side pressure (intermediate pressure). Pressure sensors pl to p4 are provided on the primary side of this pressure regulating valve, and supply pressure of hydrogen gas, and if the shutoff valves G1 to G4, which are main stop valves, are opened, the internal pressure of the fuel tank Can be measured.
- the fuel gas pipe 15 collects the hydrogen gas from the fuel tanks 11 to 14 together and communicates it with the fuel gas pipe 16.
- the pressure sensor p 10 can detect the internal pressure of the fuel gas pipe 15 consolidated into this one.
- a pressure regulating valve R 10 In the fuel gas pipe 16, a pressure regulating valve R 10, a manual valve, a pressure regulating valve R 11, and a shut-off valve L 1 are provided in order from the upstream.
- the pressure regulating valve R 10 is configured to output the intermediate pressure of the fuel gas pipe 15 at a lower secondary pressure.
- the pressure sensor 10 detects the secondary pressure of the pressure regulating valve R 10 via the manual valve.
- the pressure regulating valve R 11 further reduces the hydrogen gas pressure to a level at which it can be supplied to the fuel cell, and outputs it.
- the control valve L 1 can be controlled by the control unit 3.
- the fuel gas pipe 1 6 includes pressure sensors p 1 1 and p 1 2, and the pressure sensor p 1 1 is included in the fuel gas pipe 1 6.
- the pressure sensor p 12 detects the internal pressure in the section between the pressure regulating valves R 10 to R 11, and the pressure sensor p 12 detects the pressure in the section from the pressure regulating valve R 11 to the fuel cell 100. Note that the pressure regulating valves R 10 and R 11 are duplicated to cope with poor seals. Both pressure regulating valves are used to reduce the pressure when the pressure in the piping exceeds a predetermined level.
- a relief valve is provided on the secondary side.
- the fuel cell 100 has a stack structure in which a plurality of power generation structures called single cells are stacked. Each single cell has a structure in which a power generation body called ME A (Membrane Electrode Assembly) is sandwiched between a pair of separators provided with hydrogen gas, air, and coolant flow paths.
- ME A is composed of a polymer electrolyte membrane sandwiched between two electrodes, an anode and a cathode. In the anode, the anode catalyst layer is provided on the porous support layer, and in the cathode, the cathode catalyst layer is provided on the porous support layer.
- the hydrogen gas supplied to the anode of the fuel cell 100 is supplied to each single cell via the manifold, flows through the hydrogen gas flow path of the separator, and causes an electrochemical reaction in the ME A anode. It is summer.
- the hydrogen off-gas discharged from the fuel cell 100 is supplied to the gas-liquid separator 17.
- the gas-liquid separator 17 is configured so as to remove moisture and other impurities generated by the electrochemical reaction of the fuel cell 100 during normal operation from the hydrogen off-gas and discharge them to the outside through the shutoff valve L2. Has been.
- the circulation pump 18 is configured to circulate the hydrogen off gas by forcibly circulating it and returning it to the fuel gas pipe 16.
- the purge shut-off valve L3 is opened at the time of purging, but is shut off at the time of normal operation and judgment of gas leakage in the pipe.
- the hydrogen off-gas purged from the purge shutoff valve L 3 is processed in the exhaust system including the diluter 25.
- the air supply system 2 includes an air cleaner 21, a compressor 2 2, a humidifier 23, a gas-liquid separator 24, a diluter 25, and a silencer 26.
- the air cleaner 2 1 purifies the outside air and takes it into the fuel cell system 2 0 0.
- compressor 2 2 compresses the air taken in according to the control of the control unit 3 and changes the air volume and air pressure.
- the air supplied to the cathode of the fuel cell 100 is supplied to each single cell via the manifold in the same way as the hydrogen off gas, flows through the air flow path of the separator, and generates an electrochemical reaction at the cathode of ME A.
- Humidifiers 2 and 3 add moderate humidity to the compressed air by exchanging air off-gas and moisture discharged from 1 ° 0 of fuel cell.
- the air supplied to the fuel cell 100 is supplied to each single cell via the manifold, flows through the air flow path of the separator, and causes an electrochemical reaction at the cathode of the MEA. Excess water is removed from the air off-gas discharged from the fuel cell 100 in the gas-liquid separator 24.
- the diluter 25 is configured to mix and dilute the hydrogen off-gas supplied from the purge shut-off valve L 3 with air off-gas, and to equalize it to a concentration at which no oxidation reaction can occur.
- the silencer 26 is configured so that it can be discharged with a reduced noise level of the mixed exhaust gas.
- the electric power system 4 includes a DC-DC converter 40, a notch 41, a traction inverter 4 2, a traction motor 4 3, an auxiliary inverter 4 4, a high voltage auxiliary machine 4 5, and the like. Since the fuel cell 100 is configured by connecting single cells in series, a predetermined high voltage (for example, about 500 V) is generated between the anode A and the force sword C.
- the DC-DC converter 40 performs bidirectional voltage conversion with the battery 41 having a terminal voltage different from the output voltage of the fuel cell 100, and the power of the battery 41 as an auxiliary power source of the fuel cell 100 Or surplus power from the fuel cell 100 can be charged to the battery 41.
- the DC-DC converter 40 can set a voltage between terminals corresponding to the control of the power control unit 5.
- the battery 41 has battery cells stacked and uses a constant high voltage as a terminal voltage, and can be charged with surplus power or supplementarily supplied by control of a battery computer (not shown).
- Traction inverter 4 2 converts direct current to three-phase alternating current, Supply to the Chillon motor 4 3.
- the traction motor 43 is a three-phase motor, for example, and is a main power source of an automobile on which the fuel cell system 200 is mounted.
- the trap inverter 4 4 is a direct current to alternating current conversion means for driving the high pressure auxiliary equipment 45.
- the high pressure catcher 45 is various motors necessary for the operation of the fuel cell system 20, such as the compressor 22, the circulation pump 18, and the cooling system motors.
- the control unit 3 has a configuration as a general-purpose computer including a RAM, a ROM, an interface circuit, and the like.
- the control unit 3 executes the software program stored in the built-in ROM etc. in order to control the entire fuel cell system 200 including mainly the hydrogen gas supply system 1, the air supply system 2, and the power system 4.
- the fuel cell system 200 can be operated as an abnormality determination device of the present invention.
- the hydrogen sensor HD is a detection device configured to be able to detect the concentration of hydrogen gas, and is provided at the rear side of the automobile, for example, on the downstream side in the traveling direction from the exhaust gas exhaust port.
- Several hydrogen sensors HD may be provided where hydrogen gas leakage may occur. When other hydrogen sensors are provided, they are provided, for example, in a compartment that houses a fuel cell.
- the detection signal S d of the hydrogen sensor HD is input to the control unit 3 so as to be readable, so that the hydrogen gas concentration can be grasped.
- the hydrogen sensor HD may be capable of detecting the concentration of hydrogen gas with a predetermined resolution, or simply detecting whether or not there is a hydrogen gas having a certain concentration or more (presence).
- the abnormality determination device detects an abnormality when the hydrogen gas concentration is detected by the hydrogen sensor HD and the fuel gas concentration detected by the hydrogen sensor HD is equal to or higher than a predetermined value.
- the first abnormality determination process (means, device) for determining that the pressure is equal to (S 100 to S 102) and the pressure of the fuel gas pipe 16 are sealed with the shut-off valves G 1 to G 4, L 1, etc.
- Second abnormality determination processing (means, equipment) (S 105 to S 1 10) that determines that an abnormality occurs when the pressure change of the measured fuel gas pipe exceeds a predetermined value, and a second abnormality determination When it is determined that the process is also abnormal, a determination process (means, device) (S 1 1 1) is performed to process the system as an abnormality.
- S104 also included is a process (S104) for increasing the pressure of the fuel gas pipe after the first abnormality determination has been determined to be abnormal and before the abnormality determination by the second abnormality determination means. This will be specifically described below.
- the first abnormality determination process is terminated assuming that no hydrogen gas leaks outside the system. In this case, it is determined that the system is not abnormal.
- the detected hydrogen gas concentration D force is greater than the predetermined threshold value D th (S102: YES)
- the hydrogen gas concentration is unusually high as long as the detection signal Sd of the hydrogen sensor HD is examined. That is, the possibility that an abnormality has occurred is estimated. Therefore, the process proceeds to the second abnormality determination process.
- the fuel cell system 200 is switched to the intermittent operation mode (S103).
- the intermittent operation mode is a mode in which the minimum required operation of the fuel cell 100 is performed intermittently at predetermined intervals.
- the fuel cell 100 is repeatedly stopped and operated.
- auxiliary equipment such as the circulation pump 18 is stopped. Switching to the intermittent operation mode in this way will cause pressure fluctuations in the piping. This makes it possible to stop the auxiliary equipment and more accurately determine the abnormality.
- the fuel gas in the pipe is forcibly pressurized as desired (S 1 0 4).
- the shut-off valves G1 to G4 are opened for a certain period of time to supply hydrogen gas at a predetermined pressure to the fuel gas pipe 15 and fuel gas pipe 16 and the circulation pump 18 is turned on. Operate for a certain period of time and increase the pressure in the fuel gas pipe 16. If the hydrogen gas pressure in the piping is low, it can be expected that it will be easier to detect gas leaks by performing such pressure increase processing. This process is optional and is an unnecessary step if there is pipe pressure that can be detected.
- the process proceeds to the second abnormality determination process.
- a pipe to be inspected is sealed (S 1 0 5).
- the shutoff valves G1 to G4 and L1 are shut off, and a sealing section is formed between the fuel tanks 11 to 14 and the shutoff valve L1. Further, the shutoff valve L1 and the shutoff valve L3 are shut off, and the circulation path delimited by the purge shutoff valve L3 from the shutoff valve L1 through the fuel cell 100 becomes the sealed section.
- the pressure P t 1 at t 1 is detected by a pressure sensor capable of detecting the pressure in each sealing section (S 1 0 6).
- a pressure sensor capable of detecting the pressure in each sealing section (S 1 0 6).
- the pressure in these sections will be based on the detection signals of pressure sensors pi ⁇ p4, pi0, p11 Detected.
- the pressure in the circulation path is detected based on the detection signal of the pressure sensor p12.
- the pipe pressure P t 2 after the elapse of time t 2 (YES) is detected again from the same pressure sensor (S 1 ⁇ 7: NO) by waiting until the predetermined time t 2 elapses (S 1 ⁇ 7: NO). 0 8).
- the flow rate of the piping tends to be proportional to the square root of the pressure change. Therefore, the difference between the detected pressures P t 1 and P t 2 is calculated, and the flow rate Q between times tl and t 2 is obtained (S 1 0 9). If hydrogen gas is not leaking, the pressure change is almost zero, so the flow rate Q is also zero. However, if hydrogen gas leaks, the calculated flow rate Q will increase as a result of the pressure drop depending on the hydrogen gas flow output.
- the calculated flow rate Q is compared with a threshold value Q th that can be used to estimate an apparent hydrogen gas leak (S 1 1 0). As a result of the comparison, if the calculated flow rate Q is equal to or less than the predetermined threshold value Q th (S 1 1 0: NO), it is determined that there is no hydrogen gas leakage. In other words, since hydrogen gas stagnated locally during the first abnormality determination process, the hydrogen gas only has a temporarily high concentration, and it can be determined that there is no system abnormality. Therefore, in such a case, measures such as system shutdown will not be taken.
- the second abnormality determination is further started, and the pressure change of the sealed pipe is changed. It is determined that the system is abnormal only when a large gas leak is estimated. Therefore, if there is very local hydrogen gas retention, even if it is determined that there is an abnormality in the first abnormality determination, there is no abnormality in the pressure drop in the piping, so it is determined that there is an abnormality in the second abnormality determination. Therefore, erroneous determination can be prevented. If a gas leak actually occurs from the piping and an external fuel gas concentration abnormality has occurred, an abnormal fuel gas piping pressure drop will also occur, so the gas leakage judgment will be made correctly.
- the first abnormality determination is hydrogen gas concentration detection by the hydrogen sensor HD
- the second abnormality determination is pressure detection by the pressure sensor. Both detection principles and detection procedures are different. For this reason, even if malfunctions occur in some of the components related to detection, the final determination does not become an erroneous determination.
- the second abnormality determination is performed after the pressure is increased. (Change) The state can be determined more clearly.
- Embodiment 2 of the present invention relates to a configuration example of an abnormality determination device in which the first abnormality determination and the second abnormality determination are performed based on pressure, but the determination procedure is different.
- the system configuration of this embodiment is the same as the system block diagram of Embodiment 1 shown in FIG. However, in this embodiment, the hydrogen sensor HD is not used.
- the abnormality determination device is configured to seal the pressure of the fuel gas pipes 15 and 16 with the shutoff valves G1 to G4 and L1 to L3, and to set the pressure of the sealed fuel gas pipe to the pressure
- a first abnormality determination process (means, device) that is detected by sensors pi to 4, p 1 0 to 12 and determines that an abnormality occurs when the pressure change in the sealed fuel gas pipe is greater than or equal to a predetermined value. (S 2 0 0 to S 2 0 1) and various shut-off valves G 1 to G 4, L 1 to L 3, auxiliary machinery (18, 2 2), etc.
- the second abnormality determination process (means,) that determines that the fuel gas pipes 15 and 16 are abnormal when the power generation state of 0 is changed and the power generation amount is limited is below a predetermined value. (Device) (S 2 0 4 to S 2 0 6) and the determination process that activates the second abnormality determination when it is determined to be abnormal by the first abnormality determination (method, apparatus) (S 2 0 7) is executed.
- the detection signals from the pressure sensors pl to p4 are referred to obtain the relative pressure values of the fuel tanks 11 to 14 and from the pressure sensors p10 to p12.
- the relative internal pressure values of the fuel gas pipes 15 and 16 are acquired (S 2 0 0).
- the control unit 3 calculates the relative value of the actual hydrogen gas pressure after referring to the detection signal S d from each pressure sensor. For fuel tanks 1 1 to 14, the average value of the pressure values detected from each of fuel tanks 1 1 to 14 is calculated. .
- the fuel gas pipes 15 and 16 are maintained at a constant hydrogen gas pressure by the action of the pressure regulating valve. If any gas leaks from the fuel gas piping, the hydrogen gas pressure should drop slightly from the normal pressure. Also, the flow rate from the fuel tank must be such that it does not overflow. Therefore, for the fuel gas pipes 15 and 16, compare whether the detected hydrogen gas pressure has changed more than a certain threshold from the previously detected pressure or the standard pressure specified in advance ( S 2 0 1). For the fuel tanks 11 to 14, a comparison is made as to whether or not the detected hydrogen gas pressure average value of each fuel tank exceeds the threshold value determined to be an overflow (S 2 0 2).
- a refresh operation Prior to the second abnormality determination process, a refresh operation (re-operation) is performed (S203).
- the shutoff valve to which high pressure is applied rarely fails to operate, such as being not completely shut off. Such an incomplete operation is not a fundamental failure, but can be recovered by supplying a drive signal (a valve opening signal or a valve closing signal) again.
- the shut-off valve is provided with a valve opening signal or a valve closing signal, or a repetition of this, to eliminate such a temporary cause.
- a valve opening signal is supplied to the shutoff valves G1 to G4 which are main stop valves of the fuel tank, or a valve open signal is supplied to the shutoff valve.
- a sealing process is performed (S 2 0 4).
- the fuel gas pipes 15 and 16 are sealed for the second abnormality determination.
- the purge cutoff valve L3 which is a passage to the outside air, is closed.
- the current limitation of the fuel cell • 100 is implemented.
- the intermittent operation mode is a mode in which the minimum required fuel cell 100 is operated intermittently at a predetermined interval.
- the fuel cell 1 0 0 is repeatedly stopped and operated.
- auxiliary equipment such as the circulation pump 18 is stopped.
- shut-off valves G1 to G4 which are main stop valves, are closed. To stop the supply of hydrogen gas, consume hydrogen gas in the fuel gas piping, and form a closed space It is.
- the hydrogen gas pressure in the fuel gas pipe and the fuel tank is detected based on the detection signal from the pressure sensor (S206).
- a pressure sensor different from the pressure sensor used in the first abnormality determination is used. If the pressure sensor used in the first abnormality determination has been determined to be abnormal because a malfunction has occurred, changing the sensor used in the second abnormality determination will prevent erroneous detection. is there.
- the second abnormality determination process is the same as the first abnormality determination process in that the pressure is detected, but the determination procedure is different in that the absolute value in the sealed fuel gas pipe is determined. Is different.
- the detected hydrogen gas pressure in the fuel gas pipe is equal to or higher than the predetermined threshold P th (S207: YES), it is highly possible that hydrogen gas is leaking from the fuel gas pipe. (S209).
- the fuel tank internal pressure is further inspected (S 208). If the detected internal pressure of the fuel tank is also smaller than this threshold value P th (S 208 ⁇ NO), it can be determined that there is no leakage of hydrogen gas from the fuel gas pipe and the fuel tank.
- the second abnormality if it is determined in the first abnormality determination that there is an abnormality from the pressure drop in the fuel gas pipes 15 and 16 and the fuel tanks 11 to 14, the second abnormality
- the pressure in a state where the amount of power generation is limited is monitored, and if the pressure is abnormal, it is determined that the system is abnormal. Therefore, even if it is determined that there is an abnormality at the time of the first abnormality determination due to the pressure fluctuation caused by the operation of the auxiliary equipment of the fuel cell 100-the pressure due to the second abnormality determination
- the absolute pressure is judged with the fluctuation factors excluded, and erroneous judgment can be prevented. If a pressure drop is observed due to a gas leak from the fuel gas piping, the pressure in the state where power generation is limited is abnormally reduced. Determined.
- the component (shutoff valve) related to the abnormality determination is refreshed when it is determined that the abnormality is once in the first abnormality determination.
- the operation can be returned to normal and it can be prevented from being erroneously determined as abnormal.
- Embodiment 3 of the present invention relates to an example in which the configuration of the fuel cell system 200 is slightly different.
- FIG. 6 shows a system block diagram of the fuel cell system 200 according to the third embodiment.
- the fuel cell system 200 shown in FIG. 6 is the same as the configuration of the first embodiment except that the valve configuration provided in the inflow / outflow system of the fuel tanks 11 to 14 is different.
- a check valve, a manual valve, and pressure sensors pl to p4 are respectively provided in the pipes that flow into the fuel tanks 11 to 14 from the fuel filling pipe 10. Since there is no shut-off valve between the pressure sensor and the fuel tank, the pressure sensor p1 ⁇ p 4 is configured so that the internal pressure of the fuel tank can always be detected.
- Each G 4 is configured to be controlled to be opened and closed by the control unit 3, and when the valve is opened, the internal hydrogen gas is supplied to the fuel gas pipe 15.
- the pressure regulating valves R1 to R4 supply the hydrogen gas in the high-pressure fuel tank while reducing the pressure to a certain secondary pressure (intermediate pressure).
- the abnormality determination method of the present invention When the abnormality determination method of the present invention is implemented with the above configuration, it can be performed in substantially the same procedure as in the above embodiment.
- the pressure sensors p1 to p4 the internal pressure of the fuel tank can be detected without opening the shutoff valves G1 to G4, which are the main stop valves.
- the process of opening the main stop valve of the tank in step S 2 0 3 and closing the main stop valve of the tank in step S 2 0 5 This is not necessary for the purpose of detecting the tank internal pressure with the pressure sensor.
- the present invention can be applied by variously modifying the valve configuration and the piping structure.
- Embodiment 4 of the present invention relates to an example in which the detection principle of the detection device is made different, and an example using hydrogen gas pressure detection and flow rate detection.
- FIG. 7 shows a system block diagram of the fuel cell system 200 according to the fourth embodiment.
- the fuel cell system 200 shown in FIG. 7 is basically the same as the fuel cell system (FIG. 3) of the first embodiment. However, in the fuel cell system 200 in the fourth embodiment, in the outflow piping of the fuel tanks 11 to 14, the flow rate sensor is between the shutoff valves G 1 to G 4 and the pressure regulating valves R 1 to R 4. It differs in that it has S1-S4. Also, since hydrogen gas concentration is not detected, the hydrogen sensor HD Not provided.
- the abnormality determination device detects a change in the internal pressure of the fuel tanks 11 to 14, and if a change in the internal pressure is detected, the flow rate sensors S 1 to S 4 When the flow rate of hydrogen gas is detected by the system and the flow rate fluctuates, it is determined that the system is abnormal.
- the detection signals from the pressure sensors pl to p4 are referred to obtain the relative pressure values of the fuel tanks 11 to 14, and the detection signals from the flow sensors S1 to S4 are referred to and the fuel tanks 1 1
- the relative value of the hydrogen gas flow rate supplied to the fuel gas pipe 15 from ⁇ 14 is acquired (S 3 0 0).
- the average value of the pressure values detected from each of the fuel tanks 11 to 14 is calculated.
- the flow rate the average value of the detected flow rate values for each of the fuel tanks 11 to 14 is calculated.
- the internal pressure of the hydrogen gas in the fuel tanks 11 to 14 and the amount of hydrogen gas flowing out from the fuel tanks 11 to 14 are kept almost constant by the action of the pressure regulating valve. If the pressure regulating valve is defective or the fuel tank is defective, there should be a pressure fluctuation compared to the normal pressure. Also, the flow rate from the fuel tank must be such that it does not overflow. Therefore, it is compared whether the detected hydrogen gas pressure average value of each fuel tank has fluctuated beyond a threshold value that is determined to be an overflow (S 3 0 1). That is, the average value of the detected fuel tank internal pressure is compared with the previous detected pressure or the standard pressure defined in advance.
- Pressure change and flow rate change are closely related. If there was a change in the pressure measured at approximately the same piping location, there should have been a change in the flow rate. If the flow rate has changed, the pressure should have changed. Therefore, if pressure fluctuation is detected in the first abnormality determination and an abnormality is estimated, it is inspected whether the flow rate has fluctuated immediately. If the average value of the hydrogen gas flow rate does not vary (S 3 0 2: NO), it can be inferred that the variation in the closely related pressure is due to the malfunction of the pressure sensor. Therefore, it is not determined that the system is abnormal.
- the fourth embodiment in the first abnormality determination, if it is determined that there is an abnormality from the pressure fluctuation of the fuel tanks 11 to 14, the second abnormality determination is performed immediately, and the flow fluctuation When the flow rate is abnormal, it is determined that the system is abnormal.
- the two physical quantities detected by different detection principles in the same system operation state in the present embodiment in which hydrogen gas is supplied) are determined together and finally Therefore, it is not necessary to increase the number of inspection procedures or switch to intermittent operation for inspection.
- the present invention is not limited to the above-described embodiment, and can be variously modified and applied.
- the present invention is not limited to this, and there are various types of It is possible to combine detection devices and judgment procedures.
- the abnormality determination device (method) of the present invention is not limited to a moving body such as a vehicle, a ship, or an aircraft equipped with the fuel cell system 200, but also a fuel cell system 2 placed in a closed space such as a building or a house. It can also be applied to 0 0. Industrial applicability
- the system abnormality when an abnormality is determined by one abnormality determination unit, the system abnormality is not determined until the abnormality is determined by another abnormality determination unit. Therefore, local abnormality state determination by one abnormality determination unit is performed. Even if there is a failure, it is not the final judgment based only on the abnormality, but the confirmation work by other abnormality judgments is carried out, so it is possible to judge the abnormality with high accuracy without any misjudgment.
- the present invention can be widely used for an abnormality determination device having such a requirement.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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DE112006001470.6T DE112006001470B4 (de) | 2005-06-06 | 2006-06-06 | Anomalie-Beurteilungsvorrichtung |
US11/920,350 US7882728B2 (en) | 2005-06-06 | 2006-06-06 | Dual anomaly judgment device for a fuel cell |
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JP2005166193A JP5105218B2 (ja) | 2005-06-06 | 2005-06-06 | 異常判定装置 |
JP2005-166193 | 2005-06-06 |
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WO2006132393A1 true WO2006132393A1 (ja) | 2006-12-14 |
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PCT/JP2006/311688 WO2006132393A1 (ja) | 2005-06-06 | 2006-06-06 | 異常判定装置 |
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US (1) | US7882728B2 (ja) |
JP (1) | JP5105218B2 (ja) |
CN (1) | CN100583526C (ja) |
DE (1) | DE112006001470B4 (ja) |
WO (1) | WO2006132393A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
JP5105218B2 (ja) | 2012-12-26 |
DE112006001470B4 (de) | 2015-02-19 |
US20090064764A1 (en) | 2009-03-12 |
US7882728B2 (en) | 2011-02-08 |
JP2006339123A (ja) | 2006-12-14 |
CN101194388A (zh) | 2008-06-04 |
CN100583526C (zh) | 2010-01-20 |
DE112006001470T5 (de) | 2008-04-30 |
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