WO2007058283A1 - 燃料電池システム及びその温度調整方法 - Google Patents
燃料電池システム及びその温度調整方法 Download PDFInfo
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- WO2007058283A1 WO2007058283A1 PCT/JP2006/322908 JP2006322908W WO2007058283A1 WO 2007058283 A1 WO2007058283 A1 WO 2007058283A1 JP 2006322908 W JP2006322908 W JP 2006322908W WO 2007058283 A1 WO2007058283 A1 WO 2007058283A1
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- WIPO (PCT)
- Prior art keywords
- fuel cell
- temperature
- refrigerant
- temperature sensor
- cell system
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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
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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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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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
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04343—Temperature; Ambient temperature of anode exhausts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04358—Temperature; Ambient temperature of the coolant
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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
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the fuel cell
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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
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04395—Pressure; Ambient pressure; Flow of cathode reactants at the inlet or inside the fuel cell
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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
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/0441—Pressure; Ambient pressure; Flow of cathode exhausts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—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
- H01M8/04686—Failure or abnormal function of auxiliary devices, e.g. batteries, capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04723—Temperature of the coolant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04731—Temperature of other components of a fuel cell or fuel cell stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04768—Pressure; Flow of the coolant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to a fuel cell system and a temperature adjustment method thereof.
- Conventional cooling mechanisms include a refrigerant flow path for circulating a refrigerant (cooling water, etc.) through the fuel cell, a pump for circulating the refrigerant, a radiator and a fan for cooling the high-temperature refrigerant discharged from the fuel cell, and a refrigerant.
- a sensor is proposed that includes a temperature sensor that detects the temperature of the refrigerant, a control device that controls the pump and fan based on the detected refrigerant temperature, and the like.
- the temperature of the refrigerant flowing into the fuel cell (inlet temperature) and the temperature of the refrigerant discharged from the fuel cell (outlet temperature) are detected by temperature sensors, and cooling is performed based on the detected temperatures.
- a technique for detecting an abnormality in the mechanism and controlling the flow rate of the refrigerant has been proposed (see, for example, Japanese Patent Application Laid-Open No. 2000-103-1037). Employing such a technique makes it possible to adjust the temperature of the fuel cell based on the inlet temperature and outlet temperature of the refrigerant. Disclosure of the invention
- the present invention has been made in view of such circumstances, and in a fuel cell system that adjusts the temperature of a fuel cell based on the temperature of a refrigerant detected by a temperature sensor, even when an abnormality occurs in the temperature sensor.
- the purpose is to improve the reliability of the system by continuing the temperature adjustment.
- a fuel cell system includes a fuel cell, a refrigerant distribution means for distributing a refrigerant to the fuel cell, a temperature sensor for detecting the temperature of the refrigerant, and discharged from the fuel cell.
- a fuel cell system comprising: temperature adjusting means for adjusting the temperature of the fuel cell by controlling the flow mode of the refrigerant based on the temperature of the refrigerant, and determining whether there is an abnormality in the temperature sensor And the temperature of the refrigerant discharged from the fuel cell based on physical information related to the operating state of the fuel cell when the abnormality determination unit determines that the temperature sensor is abnormal. And means.
- the refrigerant outlet temperature can be estimated based on physical information relating to the operating state of the fuel cell.
- the temperature of the fuel cell can be adjusted by controlling the refrigerant flow mode (flow rate and temperature) based on the estimated refrigerant outlet temperature. That is, even when an abnormality occurs in the temperature sensor, the temperature adjustment of the fuel cell can be realized.
- the refrigerant temperature estimating means is related to the operating state of the fuel cell when the abnormality determining means determines that the temperature sensor is abnormal.
- the temperature adjusting means estimates the temperature of the refrigerant flowing into the fuel cell based on the physical information, and the temperature adjusting means controls the temperature of the refrigerant flowing into the fuel cell based on the temperature of the refrigerant flowing into the fuel cell. The temperature of the fuel cell may be adjusted.
- the refrigerant inlet temperature can be estimated based on physical information related to the operating state of the fuel cell.
- the temperature of the fuel cell can be adjusted by controlling the temperature of the refrigerant flowing into the fuel cell based on the estimated refrigerant inlet temperature. That is, even when an abnormality occurs in the temperature sensor, the temperature adjustment of the fuel cell can be realized.
- the temperature sensor preferably detects both the temperature of the refrigerant flowing into the fuel cell and the temperature of the refrigerant discharged from the fuel cell.
- the refrigerant temperature estimating means may estimate the temperature of the refrigerant discharged from the fuel cell using information on the temperature of the refrigerant flowing into the fuel cell.
- the fuel cell can be configured by stacking a plurality of unit cells for generating power.
- the refrigerant temperature estimation means is discharged from the fuel cell with reference to at least one of the heat transfer coefficient from the power generation section in the unit cell to the refrigerant, the heat radiation amount of the unit cell, and the heat capacity of the fuel cell.
- the temperature of the refrigerant can be estimated.
- the abnormality determination means determines that the temperature sensor is abnormal, and it is impossible to detect both the temperature of the refrigerant flowing into the fuel cell and the temperature of the refrigerant discharged from the fuel cell.
- an operation stopping means for stopping the operation of the fuel cell may be provided.
- the fuel cell can be stopped when the temperature sensor has an abnormality and both the refrigerant inlet temperature and the outlet temperature cannot be detected, so that the fuel cell can be damaged. Can be reduced.
- the mobile body having such a configuration is provided with a highly reliable fuel cell system, it has high safety.
- a temperature adjustment method for a fuel cell system includes: a fuel cell; a refrigerant distribution means for distributing a refrigerant to the fuel cell; and a temperature sensor for detecting the temperature of the refrigerant.
- a first method for determining whether or not there is an abnormality in the temperature sensor, and an adjustment method that relates to the operating state of the fuel cell when it is determined in this first step that the temperature sensor is abnormal Based on the physical information, the second step of estimating the temperature of the refrigerant discharged from the fuel cell, and controlling the flow mode of the refrigerant based on the refrigerant temperature estimated in the second step, the fuel And a third step of adjusting the temperature of the battery.
- the temperature of the fuel cell can be adjusted by controlling the refrigerant flow mode (flow rate and temperature) based on the estimated refrigerant outlet temperature. That is, even when an abnormality occurs in the temperature sensor, the temperature adjustment of the fuel cell can be realized.
- the temperature adjustment method of the fuel cell system when it is determined in the first step that there is an abnormality in the temperature sensor, physical information related to the operating state of the fuel cell is included. Based on the fourth step of estimating the temperature of the refrigerant flowing into the fuel cell, and controlling the temperature of the refrigerant flowing into the fuel cell based on the temperature of the refrigerant estimated in the fourth step. It is also possible to include a fifth step of adjusting the temperature.
- the temperature of the fuel cell can be adjusted by controlling the temperature of the refrigerant flowing into the fuel cell based on the estimated refrigerant inlet temperature. That is, even when an abnormality occurs in the temperature sensor, the temperature adjustment of the fuel cell can be realized.
- the temperature adjustment can be continued even when an abnormality occurs in the temperature sensor. It becomes possible to improve the reliability of the system.
- FIG. 1 is a configuration diagram of a fuel cell system according to an embodiment of the present invention.
- FIG. 2 is a flowchart for explaining a method of adjusting the temperature of the fuel cell in the fuel cell system shown in FIG.
- FIG. 3 is an addition value map used for estimating the coolant outlet temperature in the temperature adjustment method according to the embodiment of the present invention.
- FIG. 4 is a subtraction value map used for estimating the cooling water inlet temperature in the temperature adjustment method according to the embodiment of the present invention.
- BEST MODE FOR CARRYING OUT THE INVENTION a fuel cell system according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, an example in which the present invention is applied to an in-vehicle power generation system of a fuel cell vehicle will be described.
- the fuel cell system 1 includes a fuel cell 20 that generates power by being supplied with reaction gases (fuel gas and oxidant gas), and a hydrogen supply source for supplying hydrogen gas as fuel gas to the fuel cell 20 3 ⁇ Compressor 40 for supplying air as oxidant gas to the fuel cell 20, Refrigerant circulation means for allowing the refrigerant to flow through the fuel cell 20 (cooling water flow path 73, etc.)
- a control unit 50 is provided.
- the fuel cell 20 is a stack formed by stacking a required number of unit cells that generate power by receiving supply of fuel gas and oxidizing gas.
- the electric power generated by the fuel cell 20 is supplied to a power control unit (not shown).
- the power control unit is an inverter that drives the drive motor of a vehicle, an inverter that drives various auxiliary devices such as a compressor motor and a motor for a hydrogen pump, and charging and storage of power storage means such as a secondary battery.
- DC-DC converter that supplies power to the motors from the means.
- air outside air as an oxidizing gas is supplied to the air supply port of the fuel cell 20 through an air supply path 71.
- the air supply path 7 1 includes an air filter A 1 that removes particulates from the air, a compressor 40 that compresses air, a pressure sensor P 4 that detects the supply air pressure, and moisture required for the air. Humidifier A 2 1 etc. to add is provided.
- the compressor 40 is driven by the motor M, and the motor M is driven and controlled by the control unit 50.
- the air off gas discharged from the fuel cell 20 is discharged to the outside through the exhaust path 72. As shown in FIG.
- the exhaust passage 72 is provided with a pressure sensor P 1 for detecting the exhaust pressure, a pressure regulating valve A 4, a heat exchanger for the humidifier A 21, and the like.
- Pressure The force sensor PI is provided in the vicinity of the air exhaust port of the fuel cell 20.
- the pressure regulator A 4 functions as a pressure regulator that sets the air pressure supplied to the fuel cell 20.
- the detection signals of the pressure sensors P 4 and P 1 are transmitted to the control unit 50.
- the control unit 50 controls the motor rotation speed of the compressor 40 and the opening area of the pressure adjustment valve A 4 to set the supply air pressure and the supply air flow rate to the fuel cell 20.
- hydrogen gas as fuel gas is supplied to the hydrogen supply port of the fuel cell 20 from the hydrogen supply source 30 via the fuel supply path 74.
- the hydrogen supply source 30 for example, a high-pressure hydrogen tank can be employed. Also, a so-called fuel reformer, a hydrogen storage alloy, or the like may be employed as the hydrogen supply source 30. As shown in FIG. 1, a high-pressure hydrogen tank can be employed. Also, a so-called fuel reformer, a hydrogen storage alloy, or the like may be employed as the hydrogen supply source 30. As shown in FIG.
- Pressure sensor P 6 to detect the hydrogen pressure adjustment valve H 9 that reduces and adjusts the supply pressure of hydrogen gas to the fuel cell 20 opens and closes between the hydrogen supply port of the fuel cell 20 and the fuel supply path 7 4
- a shut-off valve H 2 1 is provided, and a pressure sensor P 5 for detecting the inlet pressure of the hydrogen gas fuel cell 20 is provided.
- the detection signals of the pressure sensors P 5 and P 6 are transmitted to the control unit 50, and the opening / closing operation of each valve is controlled by the control unit 50.
- the hydrogen gas that has not been consumed in the fuel cell 20 is discharged as a hydrogen off-gas to the hydrogen circulation path 75 and returned to the downstream side of the shutoff valve H 21 in the fuel supply path 74.
- a temperature sensor T 3 1 that detects the temperature of the hydrogen off-gas
- a gas-liquid separator that recovers moisture from the hydrogen off-gas ⁇ 4 2
- a drain valve 5 41 for discharging to a tank outside the circulation path 75, a hydrogen pump ⁇ 50, etc. for pressurizing the hydrogen off gas are provided in the hydrogen circulation path 75.
- the detection signal of temperature sensor ⁇ 3 1 is transmitted to control unit 50.
- the operation of the hydrogen pump ⁇ 50 is controlled by the controller 50.
- Hydrogen off-gas merges with hydrogen gas in fuel supply channel 74 Then, it is supplied to the fuel cell 20 and reused. Further, the hydrogen circulation path 75 is connected to the exhaust path 72 by a purge flow path 76 via a discharge control valve H51.
- the discharge control valve H 51 is operated by a command from the control unit 50 to discharge (purge) the hydrogen off-gas to the outside. By intermittently performing such a purging operation, it is possible to prevent the cell voltage from being lowered due to repeated circulation of the hydrogen off-gas and increasing the impurity concentration of the hydrogen gas on the fuel electrode side.
- a cooling water passage 73 for circulating cooling water as a refrigerant is connected to the cooling water inlet / outlet of the fuel cell 20.
- the cooling water flow path 7 3 includes a temperature sensor 6 1 that detects the temperature of the cooling water discharged from the fuel cell 20 (hereinafter referred to as “cooling water outlet temperature”), and a radiator C that radiates the heat of the cooling water to the outside. 2.
- a pump C 1 that pressurizes and circulates cooling water
- a temperature sensor 62 that detects the temperature of cooling water flowing into the fuel cell 20 (hereinafter referred to as “cooling water inlet temperature”), and the like.
- the radiator C 2 is provided with a cooling fan C 13 that is rotationally driven by a motor. Detection signals of the temperature sensors 61 and 62 are transmitted to the control unit 50 and used for fuel cell cooling control.
- the operations of the pump C 1 and the cooling fan C 13 are controlled by the control unit 50.
- the cooling water in the cooling water channel 73 is circulated to the fuel cell 20 by driving the pump C 1 with the control unit 50. That is, the control unit 50, the pump C1, and the cooling water channel 73 constitute an embodiment of the refrigerant circulation means in the present invention.
- the control unit 50 receives control information from a required load such as an accelerator signal of a vehicle (not shown) and each sensor (pressure sensor, temperature sensor, etc.) of the fuel cell system, and operates each valve and motor of each part of the system. To control.
- the control unit 50 is constituted by a computer system not shown.
- Such a computer system comprises a CPU, ROM, RAM, HD D, input / output interface, display, etc., and various controls recorded in the ROM.
- Various control operations are realized by the program being read and executed by the CPU.
- control unit 50 detects the coolant outlet temperature via the temperature sensor 61, controls the pump C 1 based on the detected coolant outlet temperature, and flows into the fuel cell 20.
- the temperature of the fuel cell 20 is adjusted by controlling the flow rate of the cooling water.
- control unit 50 detects the cooling water inlet temperature via the temperature sensor 62 and controls the cooling fan C 1 3 based on the detected cooling water inlet temperature to the fuel cell 20.
- the temperature of the fuel cell 20 is adjusted by controlling the temperature of the cooling water flowing in. That is, the control unit 50 is an embodiment of the temperature adjusting means in the present invention.
- control unit 50 determines whether or not an abnormality has occurred in the temperature sensor 61. Then, when it is determined that the temperature sensor 61 is abnormal and the detection of the cooling water outlet temperature becomes impossible, information on the cooling water inlet temperature and physical information on the operating state of the fuel cell 20 Based on the above, the coolant outlet temperature is estimated. That is, the control unit 50 also functions as an embodiment of the abnormality determination unit and the refrigerant temperature estimation unit.
- the control unit 50 functioning as a temperature adjusting means controls the pump C 1 based on the estimated cooling water outlet temperature, and controls the flow rate of the cooling water flowing into the fuel cell 20, thereby Adjust the temperature of 2 0.
- Physical information used when estimating the coolant outlet temperature includes information related to the amount of power generated by the fuel cell 20 (for example, information related to the power of the fuel cell 20, information related to voltage, information related to current, etc.) And information relating to the amount of reactant gas supplied to the fuel cell 20 (fuel gas supply amount and Z or oxidizing gas supply amount).
- the heat transfer rate from the power generation unit to the refrigerant in the unit cell constituting the fuel cell 20, the heat radiation amount of the unit cell, the heat capacity of the fuel cell 20, etc. can be referred to. wear.
- control unit 50 determines that there is an abnormality in the temperature sensors 61 and 62, and if both the cooling water inlet temperature and the cooling water outlet temperature cannot be detected, the fuel cell 20 Stop operation. That is, the control unit 50 also functions as an embodiment of the operation stop means in the present invention.
- control unit 50 detects the cooling water inlet temperature via the temperature sensor 62, controls the cooling fan C 13 based on the detected cooling water inlet temperature, and flows into the fuel cell 20 Control the temperature of the cooling water.
- the temperature of the fuel cell 20 is adjusted within a predetermined temperature range.
- the control unit 50 determines, every predetermined time, whether or not an abnormality has occurred in the temperature sensor 61 that detects the coolant outlet temperature (abnormality determination step: S1). As a method of judging whether or not an abnormality has occurred in the temperature sensor 61, there is a judgment method based on the output change of the disconnection / short-circuit judgment circuit (for example, voltage / resistance change) installed in the sensor signal input section. It is done. If there is no abnormality, the control unit 50 continues the normal operation described above and detects it with the temperature sensor 61. The temperature of the fuel cell 20 is adjusted based on the temperature of the exiting cooling water outlet, etc. (normal temperature adjustment step: S 2).
- the controller 50 determines that an abnormality has occurred in the temperature sensor 61 in the abnormality determination step S 1 (the cooling water outlet temperature cannot be detected)
- the temperature sensor 62 Based on the detected cooling water inlet temperature and the physical information (current value) relating to the power generation amount of the fuel cell 20, the cooling water outlet temperature is estimated (outlet temperature estimation step: S 3).
- the addition value map shown in FIG. 3 is used when estimating the coolant outlet temperature. For example, if the coolant inlet temperature detected by the temperature sensor 6 2 is “50 ° C” and the current value of the fuel cell 20 is “A 2 ”, the added value (cooling water inlet The value added to the temperature) is determined as “T 3 ° C”.
- the cooling water outlet temperature in such a case is estimated to be “5 0 + T 3 (° C)”.
- the control unit 50 suppresses the generation of an estimation error due to the change in the cooling water supply amount by keeping the rotation speed of the pump C1 constant.
- the control unit 50 controls the pump C 1 based on the cooling water outlet temperature estimated in the outlet temperature estimation step S 3 to control the flow rate of the cooling water flowing into the fuel cell 20, thereby Adjust the temperature of battery 20 (Temperature adjustment process at abnormal time: S 4).
- the control unit 50 repeats these process groups during the operation of the fuel cell 20.
- the control unit 50 determines that both the temperature sensors 61 and 62 are abnormal in the abnormality determination step S1, and cannot detect both the cooling water inlet temperature and the cooling water outlet temperature. If this happens, the operation of the fuel cell 20 is stopped.
- the abnormality determination process S1, the outlet temperature estimation process S3, and the abnormal temperature adjustment process S4 are respectively an embodiment of the first process, the second process, and the third process in the present invention. It corresponds to.
- the coolant outlet temperature can be estimated based on the coolant inlet temperature and physical information (current value) related to the operating state of the fuel cell 20.
- the temperature of the fuel cell 20 can be adjusted by controlling the flow rate of the cooling water flowing into the fuel cell 20 based on the estimated cooling water outlet temperature. That is, even when an abnormality occurs in the temperature sensor 61, the temperature adjustment of the fuel cell 20 can be realized.
- the fuel cell vehicle according to the embodiment described above includes the fuel cell system 1 with high reliability, the fuel cell vehicle has high safety.
- the control unit 50 performs an abnormality determination of the temperature sensor 61, and an example is shown in which the cooling water outlet temperature is estimated when an abnormality occurs in the temperature sensor 61.
- the control unit 50 determines whether the temperature sensor 62 is abnormal, and when an abnormality occurs in the temperature sensor 62, information related to the cooling water outlet temperature and physical information related to the operating state of the fuel cell 20
- the cooling water inlet temperature can also be estimated based on and (inlet temperature estimation step).
- the calculation value map shown in Fig. 4 can be used. For example, when the cooling water outlet temperature detected by the temperature sensor 61 is “80 ° C.” and the current value of the fuel cell 20 is “A 3 ”, the subtracted value (cooling water outlet) is obtained according to FIG. The value subtracted from the temperature) can be determined as “T 9 ° C”, and the cooling water inlet temperature can be estimated as “80—T 9 (° C)”. Then, the control unit 50 controls the cooling fan C 13 based on the estimated cooling water inlet temperature to control the temperature of the cooling water flowing into the fuel cell 20, thereby The temperature can be adjusted (Temperature adjustment process during abnormal conditions). These inlet temperature estimation processes and abnormal times Each of the temperature adjustment steps corresponds to one embodiment of the fourth step and the fifth step in the present invention.
- the coolant outlet temperature is estimated using the information related to the power generation amount of the fuel cell 20 (the current value of the fuel cell 20 at the time of power generation) is shown. Instead of the value, it is also possible to estimate the coolant outlet temperature using the power value or voltage value of the fuel cell 2 °.
- the power generation amount (current value) of the fuel cell 20 and the reaction gas supply amount (fuel gas supply amount and Z or oxidizing gas supply amount) to the fuel cell 20. Therefore, it is possible to estimate the cooling water outlet temperature using the information on the reaction gas supply amount.
- the coolant outlet temperature is estimated using information on the required load. It is also possible. Industrial applicability
- the fuel cell system according to the present invention can be mounted on a fuel cell vehicle, and also mounted on various mobile bodies (robots, ships, aircrafts, etc.) other than the fuel cell vehicle. Is possible. Further, the fuel cell system according to the present invention may be applied to a stationary power generation system used as a power generation facility for a building (house, building, etc.).
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN2006800434076A CN101313431B (zh) | 2005-11-21 | 2006-11-10 | 燃料电池***及其温度调节方法 |
DE112006002855.3T DE112006002855B8 (de) | 2005-11-21 | 2006-11-10 | Brennstoffzellensystem und Verfahren zur Einstellung seiner Temperatur |
US12/083,102 US8206863B2 (en) | 2005-11-21 | 2006-11-10 | Fuel cell system and its temperature adjusting method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005336067A JP5083587B2 (ja) | 2005-11-21 | 2005-11-21 | 燃料電池システム及びその温度調整方法 |
JP2005-336067 | 2005-11-21 |
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Publication Number | Publication Date |
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WO2007058283A1 true WO2007058283A1 (ja) | 2007-05-24 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/322908 WO2007058283A1 (ja) | 2005-11-21 | 2006-11-10 | 燃料電池システム及びその温度調整方法 |
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US (1) | US8206863B2 (ja) |
JP (1) | JP5083587B2 (ja) |
KR (1) | KR100972835B1 (ja) |
CN (1) | CN101313431B (ja) |
DE (1) | DE112006002855B8 (ja) |
WO (1) | WO2007058283A1 (ja) |
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US10854897B2 (en) | 2018-01-03 | 2020-12-01 | Cummins Enterprise Llc | Temperature control system and method for fuel cell system and fuel cell system |
Also Published As
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CN101313431A (zh) | 2008-11-26 |
US8206863B2 (en) | 2012-06-26 |
US20090136804A1 (en) | 2009-05-28 |
JP2007141732A (ja) | 2007-06-07 |
DE112006002855B8 (de) | 2014-07-10 |
JP5083587B2 (ja) | 2012-11-28 |
DE112006002855T5 (de) | 2008-09-25 |
CN101313431B (zh) | 2010-11-10 |
KR100972835B1 (ko) | 2010-07-28 |
KR20080056310A (ko) | 2008-06-20 |
DE112006002855B4 (de) | 2014-05-08 |
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