WO2005076433A1 - ハイブリッド燃料電池システム及びその電圧変換制御方法 - Google Patents
ハイブリッド燃料電池システム及びその電圧変換制御方法 Download PDFInfo
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- WO2005076433A1 WO2005076433A1 PCT/JP2005/001875 JP2005001875W WO2005076433A1 WO 2005076433 A1 WO2005076433 A1 WO 2005076433A1 JP 2005001875 W JP2005001875 W JP 2005001875W WO 2005076433 A1 WO2005076433 A1 WO 2005076433A1
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- fuel cell
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- value
- voltage converter
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
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- 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2045—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for optimising the use of energy
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- 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
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- 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
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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
- H01M16/00—Structural combinations of different types of electrochemical generators
- H01M16/003—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers
- H01M16/006—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers of fuel cells with rechargeable batteries
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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
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- 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
- H01M8/04858—Electric variables
- H01M8/04925—Power, energy, capacity or load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/525—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/14—Acceleration
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- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/52—Drive Train control parameters related to converters
- B60L2240/527—Voltage
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- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/52—Drive Train control parameters related to converters
- B60L2240/529—Current
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- 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
- B60L2250/00—Driver interactions
- B60L2250/26—Driver interactions by pedal actuation
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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
- 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
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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
- Y02E60/10—Energy storage using batteries
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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
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- 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 a hybrid fuel cell system and its voltage conversion control method.
- Japanese Patent Application Laid-Open No. 2002-189879 describes a maximum output ratio between a fuel cell and a battery. It is disclosed that the fuel cell is set within the range of 65 to 80 ⁇ 1 ⁇ 2 of the total output to suppress the loss in the DC-DC converter / heater. Disclosure of the invention
- the efficiency is determined by the overall effect of reactor copper loss, which is lost due to the reactor component, element loss, which is caused by the operation of switching elements such as IGBTs, and reactor iron loss, which is lost due to the reactor component. Is due.
- the number of phases can be changed in accordance with the equivalent value of the power passing through the voltage converter, for example, the input / output conversion energy amount or the operating work amount. Depending on the value, the number of phases with higher efficiency can be selected for voltage conversion, and the efficiency of the voltage converter can be greatly improved.
- the “power storage device” is not limited, and is, for example, one or a plurality of stacked nickel-metal hydride batteries or lead storage batteries.
- the voltage converter switches between a multi-phase operation that operates with a plurality of phases and a single-phase operation that operates with a single phase.
- the equivalent value is larger than the first value. It is preferable to switch to single-phase operation when it becomes smaller, and to switch to multi-phase operation when the equivalent value exceeds a second value that is larger than the first value during single-phase operation. .
- first value and second value are set to correspond to the values at which the efficiency of the entire voltage converter is reversed between multi-phase operation and single-phase operation. There is no need to change the settings, and settings can be changed as appropriate in consideration of operational stability and other circumstances.
- FIG. 1 Block diagram of the hybrid fuel cell system according to the present embodiment
- FIG. 2 is a flowchart illustrating a control method of the hybrid fuel cell system according to the present embodiment.
- FIG. 3 Diagram showing operation hysteresis of the hybrid fuel cell system
- Embodiments of the present invention apply the present invention to a fuel cell system mounted on an electric vehicle.
- FIG. 1 shows an overall system diagram of the hybrid fuel cell system 1.
- the hybrid fuel cell system 1 includes a DC-DC converter 20, a secondary battery 21, a fuel cell 22, a backflow prevention diode 23, an inverter 24, a three-phase motor 25, and a deceleration device 26. , A shaft 27, wheels 29, a power control unit 10, and a travel control unit 11.
- the secondary battery 21 is a power storage device of the present invention, and outputs a predetermined voltage by stacking a plurality of battery units such as a chargeable and dischargeable nickel-hydrogen battery and connecting them in series.
- the output terminal of the rechargeable battery 21 is provided with a / computer 14 capable of communicating with the power supply control unit 10 and the control signal Cb, and the charged state of the rechargeable battery 21 is maintained. In addition to maintaining appropriate values that do not lead to charging or overdischarging, it operates so as to maintain safety in the event that an abnormality occurs in the secondary battery.
- the output of the secondary battery 21 can be actually measured by a current sensor 15 and a voltage sensor 16.
- the DC-DC converter 20 is a voltage converter that converts power input to the primary side into a voltage value different from that of the primary side and outputs the converted voltage value.
- the DC output voltage (for example, about 200 V) of the secondary battery 21 is boosted to a higher DC voltage (for example, about 500 V), so that the three-phase motor 25 has a small current and a high current. It is possible to drive with voltage, suppress power loss due to power supply, and increase the output of the three-phase motor 25.
- the DC-DC converter 20 employs a three-phase operation system, and has a specific circuit configuration as a three-phase bridge-type converter.
- the three-phase bridge-type converter includes a circuit part similar to an inverter that temporarily converts an input DC voltage into an AC, and a part that rectifies the AC again and converts the AC into a different DC voltage. Minutes are combined.
- the converter has a three-phase structure (P1, P2) in which two parallel-connected structures of a switching element Tr and a rectifier D are stacked between primary input terminals and secondary output terminals. P2, P3) It is configured by connecting in parallel. The intermediate point of each of the two-stage stacked structures of the primary side and the secondary side is connected by a reactor L.
- an IGBT Insulated Gate Bipolar Transistor
- a diode can be used as the rectifier.
- the DC-DC converter 20 is switched at a timing adjusted so that the phase difference between the phases becomes every 120 degrees (2 volts / 3). Each phase is configured to be independently operable based on a control signal C c from the power supply control unit 10.
- the output of the DC-DC converter 20 can be actually measured by a current sensor 17 and a voltage sensor 18.
- the input current value of the DC-DC converter 20 is 15 current sensors, the output current value is from the current sensor 17, the input voltage value is from the voltage sensor 16, and the output voltage value is 18 , And can be output to the power control unit 10 respectively.
- the DC-DC converter 20 During light load operation or braking operation, the DC-DC converter 20 generates electric power using the three-phase motor 25 as a generator in reverse, and lowers the DC voltage from the secondary side of the converter to the primary side, so that the secondary battery The regenerative operation for charging the battery 21 is enabled.
- the fuel cell stack 22 is configured by stacking a plurality of single cells and connecting them in series.
- a single cell is a separator for supplying a fuel gas (hydrogen) and oxidizing gas air (oxygen) to a structure in which a polymer electrolyte membrane or the like is narrowed by two electrodes, a fuel electrode and an air electrode. It has a sandwiched structure.
- the fuel electrode has a fuel electrode catalyst layer provided on a porous support layer, and the air electrode has an air electrode catalyst layer provided on a porous support layer.
- the fuel cell stack 22 includes a known fuel gas supply system (not shown) and an empty system. There is a system that provides air and a system that provides cooling water.By controlling the amount of fuel gas and air supplied by these systems, it is possible to generate electricity at an arbitrary amount of power. Has become.
- the inverter 24 converts the high-voltage DC boosted by the DC-DC converter 20 into a three-phase AC whose phases are shifted by 120 degrees.
- the current of the inverter 24 is controlled by a control signal C i from the power supply control unit 10 as in the case of the converter 20.
- the three-phase motor 25 is the main motive power of the electric vehicle, and also generates regenerative power during deceleration.
- the speed reducer 26 is a so-called differential, and reduces the high-speed rotation of the three-phase motor 25 to a predetermined number of revolutions and rotates the wheels 29.
- the shaft 27 is provided with a wheel speed sensor 28 so as to output a wheel speed pulse Sr to the traveling control unit 19.
- the traveling control unit 11 is a computer system for traveling state control, and supplies a regeneration request value of the three-phase motor 25 to a power control unit 10 based on a brake position signal Sb from a brake pedal and a wheel speed pulse Sr. Output.
- the regenerative request value may be output based on detection signals from other steering angle sensors, auto & G sensors, master cylinder pressure sensors, and wheel cylinder pressure sensors.
- the power control unit 10 is a computer system for power control, and includes, for example, a central processing unit (CPU) 101, a RAMI 02, a ROM 103, and the like.
- the power control unit 10 receives the accelerator position signal S a ⁇ the shift position signal S s and signals from various other sensors, and outputs the power generation amount and the fuel cell stack 22 according to the operation state.
- the torque in the phase motor 25 is obtained, and the power balance of the fuel cell stack 22, the three-phase motor 25, and the secondary battery 21 is calculated by the converter 20 and the inverter 24. It is programmed to perform overall control of the power supply with the added loss.
- the operation of the hybrid fuel cell system 1 of the present embodiment will be described. First, the loss that occurs in the DC-DC converter 20 will be described.
- the power lost in the converter fluctuates depending on the power passing through the voltage converter (the amount of input / output conversion energy, the equivalent of the amount of working work).
- the number of phases with higher efficiency sometimes fluctuated between the efficiency in the case of multi-phase driving and the efficiency in the case of driving with fewer phases.
- FIG. 4 the DC- DC converter; 2 as shown in D Figure 4 that a there is shown a loss characteristic view occurring in the three-phase Buritsu di type converter as 0, losses in three-phase bridge type converter, reactor Sung: Reactor copper loss lost by ⁇ , what about the operation of switching elements such as IGBTs?
- Reactor Copper loss is due to the coil and increases as the passing power increases, and is greater in single-phase operation than in three-phase operation. Module loss also increases as the passing power increases, and is larger in single-phase operation than in three-phase operation ⁇ ) ⁇ .
- the reactor iron loss caused by the magnetic material of reactor L hardly changes even if the power applied to the reactor increases or decreases.Thus, three-phase operation is better than single-phase operation: ⁇ Good.
- Figure 5 shows the relationship between total converter loss and converter conversion efficiency when these losses are added.
- the rate of change between the reactor copper loss and the ⁇ E joule loss and the reactor iron loss because the magnitude relationship between the losses in the single-phase and the three-phase is reversed.
- the loss in the single-phase operation is lower.
- the reversal phenomenon occurs because the loss is smaller.
- the efficiency of single-phase operation is higher than that of three-phase operation. Therefore, in the present invention, single-phase operation with a small number of phases is used in the region where the passing power is relatively small, and when the passing power becomes large, the operation is switched to three-phase operation with a large number of phases to operate. I do.
- the number of operating phases can be switched depending on whether the magnitude of the total loss for each phase is greater or less than the passing power P th, which is reversed.
- passing power should be detected based on measured values. Takes time.
- the higher the passing power the more inconvenience such as hunting caused by switching tends to increase.
- control is performed so as to switch between a single phase and a three phase in a region of a somewhat lower passing power.
- a first power value P1 and a second power value P2 are set as thresholds for switching the number of phases.
- the passing power is smaller than the first power value P 1 (for example, 4 kW).
- control is performed to switch to single-phase operation.
- control is performed to switch to three-phase operation when the passing power exceeds a second power value (for example, 5 kW) larger than the first power value.
- the reason for having two threshold values in this way is to prevent hunting (an unstable phenomenon such as oscillation) that may occur during switching operation. That is, as shown in FIG. 3, such an operation sequence forms a hysteresis loop.
- the power supply control unit 10 includes a hydrogen pressure sensor (not shown) (for example, a fuel cell ⁇
- the output current of the fuel cell stack 22 is determined by referring to the detection signal from a temperature sensor (for example, the one provided at the coolant outlet of the fuel cell stack). Specify the output voltage (IV) characteristics (S1).
- a temperature sensor for example, the one provided at the coolant outlet of the fuel cell stack.
- IV output voltage
- S1 the output voltage characteristics
- the ROM 103 stores a data table that specifies such a relationship between the temperature and the I-V characteristic for each hydrogen supply pressure, and the power supply control unit 10 refers to this table to perform detection.
- the power supply control unit 10 refers to the accelerator position signal Sa (acceleration request value) and the shift position signal S s (forward, reverse, and gear ratio request values). Then, the required torque (load) for the three-phase motor 25 is calculated (S 3). The amount of this torque becomes the effective power of the three-phase AC power that the inverter 24 should output.
- the power control unit 10 also determines the required output power Pr required for the entire system, taking into account the power loss generated in the inverter 24 and the converter 20 (S4).
- the target power generation amount Pfc of the fuel cell stack 22 that compensates for the required output power Pr is obtained from the output current-output voltage characteristics (S5), and the power generation amount Pfc can be output.
- the secondary voltage of converter 20 is controlled by control signal Cc so as to be the output terminal voltage. If the amount of power generated by the fuel cell stack 22 cannot cover all of the required output power Pr by merely changing the secondary voltage, the power control unit 10 changes the amount of fuel gas and air supplied. To change the I-V characteristic and power Control to make up for the shortfall of
- the power supply control unit 10 performs the power balance calculation to determine the power that must be supplied from the secondary battery 21 to the inverter 24, that is, the power passing through the converter / power converter.
- the power control unit 10 changes the threshold for switching the number of phases depending on whether or not the DC-DC converter 20 is operating in three phases (S8). In other words, if the vehicle is currently in third-run operation (S8: YES), as can be seen from Fig. 5, the efficiency is higher if the passing power is relatively high, and the efficiency decreases as the passing power becomes lower.
- the power control unit 10 compares the first power value P1 with the passing power Pc (S10), and if the passing power Pc is larger than the first power value P1, (NO ), The three-phase operation is continued, but if the passing power Pc falls below the first power value P1 (YES), efficient single-phase operation is performed when the passing power is relatively small.
- the control signal C c for switching is output (S 11).
- the control section 10 compares the second power value P2 with the passing power Pc (S12), and if the passing power Pc is smaller than the second power value P2 (NO), the single-phase operation is performed as it is. If the passing power Pc exceeds the second power value P2 (YES), the control signal CG for switching to the efficient three-phase operation is output when the passing power is relatively high. (S13).
- the power balance was estimated and the power passing through the computer was calculated.
- the primary power of the converter 20 was measured from the current sensor 15 and the voltage sensor 16 and the current sensor 17 was measured.
- the secondary-side power may be actually measured from the voltage sensor 18 and the power passing through the converter 20 may be calculated from the difference.
- the number of phases with high power efficiency is selected according to the power value of the passing power Pc of the DC-DC converter 20, and the operation based on the number of phases is performed.
- an efficient hybrid fuel cell system 1 that takes into account the operation of the converter can be provided.
- the present invention can be variously modified and applied other than the above embodiment.
- three-phase operation and single-phase operation are switched.
- different combinations for example, control for switching between three-phase operation and two-phase operation or switching between two-phase operation and single-phase operation It may be.
- the three-phase bridge type converter is illustrated, but the invention is not limited to the circuit configuration.
- the present invention can be applied to any voltage converter that is driven by a plurality of phases (two or more phases) and that can independently switch phases, and can be operated to achieve the effects and advantages of the present invention.
- the converter is switched between the single-phase operation and the three-phase operation. Alternatively, it may be continuously switched in any number of stages from multiple phases to a single phase. Further, in the above-described embodiment, in addition to using a narrowly defined power value that is a product of a passing current and a terminal voltage as a passing power of the converter, a current value under a constant condition, an equivalent value of an input / output conversion energy, an operation work amount, and the like. The configuration may be such that the number of phases can be converted based on a voltage value or the like.
- the present invention relates to a system in which the passing power of a voltage converter is frequently changed, for example, a fuel cell mounted on a moving object such as a vehicle, a ship, an aircraft, a robot, and an electronic device such as a portable electronic terminal. Suitable for the system.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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DE112005000289.6T DE112005000289B8 (de) | 2004-02-03 | 2005-02-02 | Hybrid-Brennstoffzellensystem und Spannungsumwandlungs-Steuerverfahren dafür |
JP2005517798A JP4506980B2 (ja) | 2004-02-03 | 2005-02-02 | ハイブリッド燃料電池システム及びその電圧変換制御方法 |
US10/588,227 US8071232B2 (en) | 2004-02-03 | 2005-02-02 | Hybrid fuel cell system and voltage conversion control method thereof |
Applications Claiming Priority (2)
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JP2004026743 | 2004-02-03 | ||
JP2004-026743 | 2004-02-03 |
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WO2005076433A1 true WO2005076433A1 (ja) | 2005-08-18 |
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PCT/JP2005/001875 WO2005076433A1 (ja) | 2004-02-03 | 2005-02-02 | ハイブリッド燃料電池システム及びその電圧変換制御方法 |
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US (1) | US8071232B2 (ja) |
JP (1) | JP4506980B2 (ja) |
KR (1) | KR100835331B1 (ja) |
CN (1) | CN100566074C (ja) |
DE (1) | DE112005000289B8 (ja) |
WO (1) | WO2005076433A1 (ja) |
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JP2008092662A (ja) * | 2006-10-02 | 2008-04-17 | Toyota Motor Corp | コンバータ制御装置 |
JP2008154387A (ja) * | 2006-12-19 | 2008-07-03 | Toyota Motor Corp | 移動体 |
WO2008114758A1 (ja) * | 2007-03-12 | 2008-09-25 | Toyota Jidosha Kabushiki Kaisha | 燃料電池システム |
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- 2005-02-02 CN CNB2005800039867A patent/CN100566074C/zh not_active Expired - Fee Related
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US8765312B2 (en) | 2009-06-03 | 2014-07-01 | Toyota Jidosha Kabushiki Kaisha | Converter controlling apparatus |
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JP2016106523A (ja) * | 2016-03-18 | 2016-06-16 | レノボ・イノベーションズ・リミテッド(香港) | マルチフェーズdc/dcコンバータ及びその制御方法 |
Also Published As
Publication number | Publication date |
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US20080220298A1 (en) | 2008-09-11 |
JPWO2005076433A1 (ja) | 2007-10-18 |
JP4506980B2 (ja) | 2010-07-21 |
CN100566074C (zh) | 2009-12-02 |
DE112005000289B8 (de) | 2023-03-16 |
US8071232B2 (en) | 2011-12-06 |
CN1914780A (zh) | 2007-02-14 |
KR20070004613A (ko) | 2007-01-09 |
DE112005000289B4 (de) | 2022-08-25 |
DE112005000289T5 (de) | 2007-02-15 |
KR100835331B1 (ko) | 2008-06-04 |
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