JP2011142033A - Power supply device and control method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain response delay of increase of a driving amount on an auxiliary equipment of a fuel cell when an amount of power generation of the fuel cell should be increased, and to increase an amount of power generation of the fuel cell in sufficient response. <P>SOLUTION: The power supply device 10 having a fuel cell system 12 and a capacitor also has a load request acquisition section, a control section 60, and an auxiliary equipment acceleration factor power lead-out section. The auxiliary equipment acceleration factor power lead-out section leads out auxiliary equipment acceleration factor power required with the auxiliary equipment of the fuel cell by exceeding power corresponding to a workload according to a load request to the auxiliary equipment of the fuel cell in order to make an amount of power generation of the fuel cell increase to an output target value of the fuel cell corresponding to the load request within a response time. The control section 60 controls an amount of output power by securing the auxiliary equipment acceleration factor power in addition to the power responding to the workload corresponding to the power request of the auxiliary equipment of the fuel cell as a power supply amount to the auxiliary equipment of the fuel cell, when the power corresponding to the load request is supplied from the fuel cell system 12 to the load. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power supply device including a fuel cell system and a control method thereof.

  The fuel cell system generally includes an auxiliary device that is necessary for power generation of the fuel cell and whose driving amount varies depending on the power generation amount of the fuel cell. One example of such a fuel cell auxiliary device is an air compressor for supplying air as an oxidizing gas to the cathode. By varying the drive amount of the air compressor according to the power generation amount of the fuel cell, it becomes possible to supply the fuel cell with an amount of oxidizing gas necessary for power generation. When driving the fuel cell auxiliary machine according to the power generation amount of the fuel cell as described above, if the power generation amount of the fuel cell greatly increases, in order to increase the drive amount of the fuel cell auxiliary machine, The amount of energy required to be supplied to the machine may increase rapidly. If the required amount of energy that has rapidly increased cannot be supplied to the fuel cell auxiliary machine, the drive amount in the fuel cell auxiliary machine cannot be increased with sufficient responsiveness. As a configuration for covering the required energy amount of the fuel cell auxiliary machine when the amount of power generation of the fuel cell is increased, conventionally, a battery provided in the fuel cell system is used and an air compressor which is a fuel cell auxiliary machine is used. A configuration for supplementing power is known (see, for example, Patent Document 1).

JP-A-11-345623

  However, even when power is supplemented from the battery to the fuel cell auxiliary machine, the increase in the required energy amount in the fuel cell auxiliary machine is excessive, or the state of charge (remaining capacity) in the battery is insufficient. In some cases, replenishment of power from the battery could be insufficient. When there is an instruction input to increase the power generation amount of the fuel cell, if a sufficient amount of energy cannot be supplied to the fuel cell auxiliary machine, the operation to increase the power generation amount of the fuel cell is insufficient. There is a possibility. For example, when the fuel cell auxiliary machine is the air compressor described above, the amount of oxidizing gas supplied to the fuel cell becomes insufficient, so that the power generation amount of the fuel cell with sufficient responsiveness to the above instruction input. May not be able to increase.

  The present invention has been made in order to solve the above-described conventional problems. When the power generation amount of the fuel cell is to be increased, the response delay of the drive amount increase in the fuel cell auxiliary machine is suppressed, and sufficient response is achieved. The purpose is to increase the amount of power generated by the fuel cell.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
A power supply device for supplying power to a load,
A battery capable of supplying power to the load;
A fuel cell that can supply power to the load, and is an auxiliary device that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and the fuel cell A fuel cell system equipped with a fuel cell auxiliary machine in which the power required for driving increases as the amount of power generation increases,
A load request acquisition unit for acquiring a load request related to the magnitude of the load;
A control unit that controls the amount of power supplied to the load, the amount of drive of each part constituting the fuel cell, and the amount of output power from the fuel cell and the battery;
In order to increase the power generation amount of the fuel cell to a fuel cell output target value according to the load requirement within a predetermined response time, electric power corresponding to the work amount according to the load requirement in the fuel cell auxiliary machine An auxiliary component acceleration power deriving unit for deriving auxiliary component acceleration power that is the power required by the fuel cell auxiliary device beyond
With
When the control unit performs control to supply power corresponding to the load request from the power supply device to the load, the load request in the fuel cell auxiliary machine is used as a power supply amount to the fuel cell auxiliary machine. A power supply apparatus that controls the output power amount by securing the auxiliary acceleration power in addition to the power corresponding to the work amount corresponding to the power.

  According to the power supply device described in Application Example 1, when the power is supplied from the fuel cell system to the load, the auxiliary acceleration power is obtained and the auxiliary acceleration is ensured in the electric power supplied to the fuel cell auxiliary machine. Therefore, it is possible to suppress the shortage of the auxiliary acceleration power in the output from the power supply device. Therefore, even when the load demand is increased, it is possible to suppress the occurrence of inconvenience in the power supply device due to the shortage of auxiliary power for acceleration, and to increase the power generation amount of the fuel cell with sufficient responsiveness.

[Application Example 2]
In the power supply device according to the application example 1, when the control unit supplies power corresponding to the load request from the power supply device to the load, the power corresponding to the auxiliary acceleration power is A power supply device that controls the drive amount of each part constituting the fuel cell and the output power amount from the fuel cell and the capacitor so as to be secured in the output from the capacitor. According to the power supply device described in the application example 2, in order to ensure the auxiliary machine acceleration power at the output from the battery, without considering the magnitude of the auxiliary machine acceleration power, according to the range of the load size, An upper limit value of the output power of the fuel cell system can be set.

[Application Example 3]
The power supply device according to Application Example 2, further, a capacitor allowable value deriving unit that derives a capacitor output allowable value that is a limit value of an output that can be extracted from the capacitor, and an electric power that meets the load request, A capacitor request for deriving a capacitor required output that is the amount of power to be output from the capacitor in order to cover the auxiliary acceleration power by the capacitor when outputting from the power supply device to the load within the reference response time The output derivation unit compares the capacitor output allowable value with the capacitor required output, and determines that the capacitor required output can be output from the capacitor when the capacitor output allowable value is greater than or equal to the capacitor required output. A capacitor output determination unit that determines that the capacitor required output cannot be output from the capacitor when the capacitor output allowable value is less than the capacitor required output; When the storage device output determination unit determines that the storage device required output cannot be output from the storage device, the storage device output is applied to the load in response to the load request so that the storage device request output is less than or equal to the storage device output allowable value. A suppression setting unit that corrects a condition when power is supplied to the storage unit, and the control unit determines that the suppression setting is performed when the capacitor output determination unit determines that the capacitor required output cannot be output from the capacitor. A power supply apparatus that controls the drive amount of each part constituting the fuel cell and the output power amount from the fuel cell and the battery based on the condition corrected by the part. According to the power supply device described in Application Example 3, when the capacitor output allowable value is insufficient with respect to the capacitor required output including the auxiliary machine acceleration component power, the load is set so that the capacitor required output is less than the capacitor output allowable value. Since the conditions for supplying power to the load in response to the request are corrected, it is possible to suppress inconveniences that occur in the operation of increasing the output due to the shortage of the auxiliary acceleration power.

[Application Example 4]
The power supply apparatus according to Application Example 3, wherein the suppression setting unit re-sets the reference response time as a correction of the condition, and the auxiliary device acceleration power deriving unit derives the auxiliary device acceleration power deriving unit A power supply device that reduces the capacitor required output derived by the capacitor required output deriving unit by reducing the divided power, and sets the capacitor required output to be equal to or less than the capacitor output allowable value. According to the power supply device described in the application example 4, it is possible to suppress shortage of auxiliary machine acceleration power by resetting the reference response time to be longer.

[Application Example 5]
The power supply apparatus according to Application Example 3, wherein the suppression setting unit resets the fuel cell output target value to be lower than a value commensurate with the load request as a correction of the condition, and accelerates the auxiliary machine. A power supply that reduces the capacitor required output derived by the capacitor required output deriving unit and reduces the capacitor required output to the capacitor output allowable value or less by reducing the auxiliary machine acceleration divided power derived by the divided power deriving unit apparatus. According to the power supply device described in the application example 5, by setting the fuel cell output target value lower, it is possible to suppress the shortage of auxiliary acceleration power.

[Application Example 6]
6. The power supply device according to any one of Application Examples 3 to 5, wherein when the capacitor output determination unit determines that the capacitor request output can be output from the capacitor, the capacitor output allowable value is the capacitor request An acceleration amount increase setting unit that corrects the reference response time to a shorter time within a range in which a state equal to or higher than the output can be maintained; and Is output based on the reference response time corrected by the acceleration amount increase setting unit, and output power from the fuel cell and the battery A power supply that controls the amount. According to the power supply device described in the application example 6, when there is a margin in the output of the capacitor, the responsiveness to the load request can be further improved by setting the reference response time shorter.

[Application Example 7]
The power supply device according to any one of Application Examples 3 to 5, wherein the control unit determines that the capacitor output determination unit can output the capacitor request output from the capacitor, and meets the load request. When the electric power cannot be output from the fuel cell system, the electric power is supplied from the electric storage device to the load in a range in which the total amount of output from the electric storage device does not exceed the allowable output value of the electric storage device. A power supply device for controlling the drive amount of each part constituting the fuel cell and the output power amount from the fuel cell and the battery. According to the power supply device described in the application example 7, even when the output power from the fuel cell system is insufficient, the power that is closer to the load request is supplied to the load while securing the auxiliary acceleration power. Is possible.

[Application Example 8]
A power supply device for supplying power to a load,
A fuel cell system comprising a fuel cell capable of supplying electric power to the load;
A battery capable of supplying power to the load;
With
The fuel cell system is an auxiliary machine that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and needs to be driven as the power generation amount of the fuel cell increases. A fuel cell auxiliary machine that increases power,
The battery can be charged by the fuel cell, and can output a shortage of power generated as a control error when performing control to supply power from the fuel cell to the load in response to a load request. There,
The power supply device further includes:
A capacitor allowable value deriving unit for deriving a capacitor output allowable value that is a limit value of an output that can be taken out from the capacitor;
When the power generation amount of the fuel cell is increased to a power generation amount corresponding to the load request within a predetermined response time, the power corresponding to the work amount corresponding to the load request in the fuel cell auxiliary machine is exceeded. Maximum deriving the maximum required output that is the sum of the maximum value of acceleration power that is the maximum value of auxiliary acceleration power that is required by the fuel cell auxiliary machine and the shortage of power that occurs as the error A request output deriving unit;
The fuel cell is configured so that the fuel cell charges the capacitor when the capacitor output allowable value is compared with the maximum required output and the capacitor output allowable value is less than the maximum required output. A control unit for controlling the drive amount of each unit to perform, and the output power amount from the fuel cell and the battery,
A power supply device comprising:

  According to the power supply device described in the application example 8, when power is supplied from the fuel cell system to the load, even if the load demand fluctuates and the auxiliary acceleration power increases, the auxiliary acceleration power Can be secured at the output from the battery. Therefore, even when the load demand increases, it is possible to suppress inconvenience due to a shortage of auxiliary machine acceleration power.

[Application Example 9]
A power supply device for supplying power to a load,
A fuel cell system comprising a fuel cell capable of supplying electric power to the load;
A battery capable of supplying power to the load;
A load request acquisition unit for acquiring a load request related to the magnitude of the load;
With
The fuel cell system is an auxiliary machine that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and needs to be driven as the power generation amount of the fuel cell increases. A fuel cell auxiliary machine that increases power,
The capacitor is capable of outputting a shortage of power that occurs as a control error when performing control to supply power according to the load request from the fuel cell to the load,
The power supply device further includes:
Auxiliary equipment that is consumed by the fuel cell auxiliary machine in excess of the power corresponding to the workload corresponding to the load demand in the fuel cell auxiliary machine among the electric power consumed by the fuel cell auxiliary machine Auxiliary acceleration power deriving unit for deriving acceleration power,
The drive amount of each part constituting the fuel cell and the output power amount from the fuel cell and the battery are controlled so that the power corresponding to the load request is supplied from the power supply device to the load. At the same time, when the auxiliary acceleration power derived by the auxiliary acceleration power deriving unit exceeds a preset reference value, the power supplied from the power supply device to the load is set as the load request. And a control unit that changes the control so as to suppress the electric power more than the appropriate power.

  According to the power supply device described in the application example 9, when the power consumption for auxiliary machinery currently consumed exceeds the reference value, the power for acceleration in the future is reduced by suppressing the power supplied from the power supply device to the load. Therefore, it is possible to suppress inconvenience caused by insufficient auxiliary acceleration power in the output from the power supply device.

[Application Example 10]
10. The power supply device according to any one of application examples 1 to 9, wherein the fuel cell auxiliary machine includes a drive motor. According to the power supply device described in Application Example 10, it is possible to suppress inconveniences caused by a shortage of power for accelerating the auxiliary machine caused by the inertial force in the drive motor of the fuel cell auxiliary machine.

[Application Example 11]
The power supply device according to any one of Application Examples 1 to 7 and 9, wherein the fuel cell auxiliary device is an air compressor that supplies air to a cathode of the fuel cell, and the auxiliary device acceleration power The derivation unit is a power supply device that derives the auxiliary component acceleration power based on at least the rotation speed of the air compressor or the motor of the air compressor. According to the power supply device described in the application example 11, it is possible to derive the auxiliary acceleration power in the air compressor that is the fuel cell auxiliary machine, based on at least the rotation speed of the air compressor or the motor of the air compressor.

[Application Example 12]
The power supply device according to any one of Application Examples 1 to 7 and 9, wherein the fuel cell auxiliary device is an air compressor that supplies air to a cathode of the fuel cell, and the auxiliary device acceleration power The deriving unit derives the auxiliary acceleration power based on the rotation speed of the air compressor motor, the reference response time, and the inertia of the air compressor and the air compressor motor. According to the power supply device described in the application example 12, in the air compressor which is a fuel cell auxiliary machine, based on the rotation speed in the motor of the air compressor, the reference response time, and the inertia in the motor of the air compressor and the air compressor. Auxiliary acceleration power can be derived with high accuracy.

  The present invention can be realized in various forms other than those described above. For example, the present invention can be realized in the form of a moving body in which the power supply apparatus of the present invention is mounted as a driving power supply, a control method for the power supply apparatus, and the like. .

2 is a block diagram illustrating a schematic configuration of a power supply device 10. FIG. It is a flowchart showing a drive time control processing routine. It is explanatory drawing showing a mode that the power consumption of the air compressor 31 increases. FIG. 4 is an explanatory diagram showing current-voltage characteristics in the fuel cell stack 15. It is explanatory drawing showing a mode that drive electric power increases at the time of load request increase. It is a flowchart showing a drive time control processing routine. It is a flowchart showing a drive time control processing routine. It is a flowchart showing a charge control process routine at the time of a drive.

A. Overall configuration of the device:
FIG. 1 is a block diagram showing a schematic configuration of a power supply device 10 according to a first embodiment of the present invention. In the present embodiment, the power supply device 10 is mounted on an electric vehicle and used as a driving power source. The power supply device 10 includes a fuel cell system 12, a secondary battery 50, and a control unit 60. The fuel cell system 12 includes a fuel cell stack 15, a fuel gas supply / discharge unit 20, an oxidizing gas supply / discharge unit 30, and a refrigerant supply / discharge unit 40. Further, the electric vehicle equipped with the power supply device 10 includes a DC / DC converter 51, inverters 52 and 54, a drive motor 53, and an auxiliary motor 55.

  The fuel cell stack 15 constituting the fuel cell system 12 is a polymer electrolyte fuel cell and has a stack configuration in which a plurality of single cells are stacked. In this embodiment, the single cell includes an MEA (Membrane Electrode Assembly), a gas diffusion layer, and a gas separator. Here, the MEA includes an electrolyte membrane and an anode and a cathode that are electrodes formed on each surface of the electrolyte membrane. The MEA is sandwiched between gas diffusion layers, and the sandwich structure composed of MEA and gas diffusion layers is sandwiched between gas separators from both sides.

  The electrolyte membrane constituting the MEA is a proton conductive ion exchange membrane formed of a solid polymer material, for example, a fluorine-based resin, and exhibits good electrical conductivity in a wet state. The cathode and the anode are layers formed on the electrolyte membrane, and include carbon particles supporting a catalytic metal (for example, platinum) that progresses an electrochemical reaction, and a polymer electrolyte having proton conductivity. The gas diffusion layer is formed of a member having gas permeability and electronic conductivity, and may be formed of, for example, a metal member such as foam metal or metal mesh, or a carbon member such as carbon cloth or carbon paper. it can.

  The gas separator is formed of a gas-impermeable conductive member, for example, a carbon-made member such as dense carbon that has been made gas-impermeable by compressing carbon, or a metal member such as press-formed stainless steel. The gas separator forms a flow path of fuel gas containing hydrogen (intra-cell fuel gas flow path) between the anode of the MEA and the flow path of oxidizing gas containing oxygen between the cathode of the MEA. (In-cell oxidizing gas flow path) is formed. The surface of the gas separator may have irregularities for forming the above-described gas flow path in the cell, or for forming the gas flow path in the cell between the gas separator and the gas diffusion layer. A porous body may be disposed.

  An inter-cell refrigerant flow path is further formed inside the fuel cell stack 15. Such a refrigerant flow path can be formed, for example, between all the stacked single cells, specifically, between adjacent gas separators constituting different single cells. Alternatively, an inter-cell refrigerant flow path may be formed between gas separators every time a predetermined number of single cells are stacked.

  Further, the fuel cell stack 15 is formed with a plurality of flow paths that penetrate the fuel cell stack 15 in the stacking direction. Specifically, a fuel gas supply manifold for distributing fuel gas to each in-cell fuel gas flow path, and a fuel gas discharge manifold for collecting exhaust fuel gas discharged from each in-cell fuel gas flow path are formed. Has been. In addition, an oxidizing gas supply manifold for distributing the oxidizing gas to the in-cell oxidizing gas flow paths and an oxidizing gas discharge manifold for collecting the exhaust oxidizing gases discharged from the in-cell oxidizing gas flow paths are formed. . Furthermore, a refrigerant supply manifold for distributing the refrigerant to the inter-cell refrigerant flow paths and a refrigerant discharge manifold for collecting the refrigerant discharged from the inter-cell refrigerant flow paths are formed.

  The fuel gas supply / discharge unit 20 constituting the fuel cell system 12 has a function of supplying a fuel gas containing hydrogen to the fuel cell stack 15 and re-supplying the exhausted fuel gas discharged from the fuel cell stack 15 to the anode. Have. The fuel gas supply / discharge unit 20 includes a hydrogen tank 21, a fuel gas supply pipe 25, a fuel gas circulation pipe 26, and a hydrogen filling pipe 24. The hydrogen tank 21 is a tank that stores hydrogen supplied as fuel gas to the fuel cell stack 15. In this embodiment, the hydrogen tank 21 is constituted by a cylinder that stores high-pressure hydrogen gas, but other types of tanks such as a tank that stores hydrogen by storing hydrogen in a hydrogen storage alloy can also be used. . Although the power supply device 10 of the present embodiment includes four hydrogen tanks 21, the number of hydrogen tanks is arbitrarily set according to the cruising distance that should be secured in the electric vehicle, the loading space that can be secured in the electric vehicle, and the like. can do. One end of the fuel gas supply pipe 25 is branched and connected to each hydrogen tank 21, and the other end is connected to the fuel cell stack 15 (specifically, the supply port at the end of the fuel gas supply manifold described above). It is connected.

  A pressure regulating valve 22 is provided in the fuel gas supply pipe 25. The pressure regulating valve 22 is a valve that adjusts the pressure in the fuel gas supply pipe 25 on the downstream side of the pressure regulating valve 22 to a set predetermined value. When hydrogen is consumed in the fuel cell stack 15 along with power generation, an amount of gas corresponding to the amount of power generation is supplied from the hydrogen tank 21 via the pressure regulating valve 22, and the pressure on the downstream side of the pressure regulating valve 22 is reduced. It is kept at a predetermined value.

  One end of the fuel gas circulation pipe 26 is connected to the fuel cell stack 15 (specifically, the discharge port at the end of the fuel gas discharge manifold described above), and the other end is in the middle of the fuel gas supply pipe 25 ( Specifically, it is connected to a position downstream of the pressure regulating valve 22). The fuel gas circulation pipe 26 is provided with a fuel gas circulation pump 23 that generates a driving force when hydrogen circulates in the flow path. The exhausted fuel gas discharged from the fuel cell stack 15 is introduced into the fuel gas supply pipe 25 by operating the fuel gas circulation pump 23, and is again used as the fuel gas for the electrochemical reaction of the fuel cell stack 15.

  The fuel gas circulation pipe 26 is provided with an on-off valve (not shown) for discharging a part of the gas in the pipe to the outside of the pipe. When impurities in the circulating hydrogen (nitrogen, water vapor, etc.) increase with the power generation of the fuel cell stack 15, the steam on-off valve is opened, and a part of the hydrogen gas whose impurity concentration has increased is external to the system. The concentration of impurities in the circulating hydrogen is suppressed.

  Further, one end of the hydrogen filling pipe 24 is branched and connected to each hydrogen tank 21, and a hydrogen supply port is provided at the other end. The hydrogen supply port can be connected to a hydrogen supply device. By connecting to the hydrogen supply device via the hydrogen supply port, each hydrogen tank 21 can be supplemented and filled with hydrogen.

  The oxidizing gas supply / exhaust section 30 constituting the fuel cell system 12 supplies air as oxidizing gas to the fuel cell stack 15 and discharges exhausted oxidizing gas discharged from the fuel cell stack 15 to the outside of the power supply device 10. It has a function. The oxidizing gas supply / discharge unit 30 includes an oxidizing gas supply pipe 33, an oxidizing gas discharge pipe 34, an air compressor 31, and a humidifier 32. One end of the oxidizing gas supply pipe 33 is opened to the atmosphere existing outside the power supply device 10, and the other end is connected to the fuel cell stack 15 (specifically, the supply port at the end of the oxidizing gas supply manifold described above). It is connected. An air compressor 31 is provided in the oxidizing gas supply pipe 33. The air compressor 31 compresses the oxidizing gas (air) taken into the oxidizing gas supply pipe 33 from the outside of the system via an air cleaner (not shown). The compressed oxidizing gas is supplied to the fuel cell stack 15. The supply amount of the oxidizing gas to the fuel cell stack 15 can be adjusted by controlling the rotation speed of the motor provided in the air compressor 31 by the control unit 60. At the time of power generation of the fuel cell stack 15, the air is generated so that the amount of oxidizing gas required for generating the target value of power generation amount in the fuel cell stack 15 (hereinafter referred to as fuel cell output target value) can be supplied to the fuel cell stack 15. The target rotational speed of the motor of the compressor 31 is set, and drive control of the air compressor 31 is performed.

  One end of the oxidant gas discharge pipe 34 is connected to the fuel cell stack 15 (specifically, the discharge port at the end of the oxidant gas discharge manifold described above), and the exhaust oxidant gas discharged from the fuel cell stack 15 is It is discharged from the other end of the oxidizing gas discharge pipe to the outside of the system. The humidifier 32 is a device for humidifying the oxidizing gas supplied to the fuel cell stack 15. The humidifier 32 is formed such that a part of the oxidizing gas supply pipe 33 on the downstream side of the air compressor 31 and a part of the oxidizing gas discharge pipe 34 pass through the inside. Inside the humidifier 32, the oxidant gas supply pipe 33 and the oxidant gas discharge pipe 34 are arranged so as to be in contact with each other through a film having water vapor permeability. As a result, in the humidifier 32, the oxidizing gas in the oxidizing gas supply pipe 33 is humidified by the exhausted oxidizing gas having a high water vapor concentration in the oxidizing gas discharge pipe 34.

  The refrigerant supply / exhaust unit 40 constituting the fuel cell system 12 has a function of maintaining the temperature of the fuel cell stack 15 appropriately by supplying a refrigerant (for example, cooling water) to the fuel cell stack 15. The refrigerant supply / discharge unit 40 includes a refrigerant pipe 43 and a radiator 41. The refrigerant pipe 43 is a flow path that guides the refrigerant so as to circulate between the fuel cell stack 15 and the radiator 41. The refrigerant pipe 43 is provided with a refrigerant circulation pump 42, and the refrigerant circulation pump 42 generates a driving force for circulating the refrigerant through the refrigerant pipe 43. By circulating in this way, the refrigerant absorbs heat generated by the electrochemical reaction in the fuel cell stack 15 and dissipates the absorbed heat in the radiator 41.

  A wiring 56 is connected to the output terminal of the fuel cell stack 15. When the fuel cell stack 15 generates electric power, as described above, hydrogen as a fuel gas is supplied to the anode, and air as an oxidizing gas is supplied to the cathode, and an electrochemical reaction proceeds in each single cell. . The electric power generated by the fuel cell stack 15 is supplied to the inverter 52 via the wiring 56, converted into AC power, and supplied to the drive motor 53 for driving the vehicle. In addition, an inverter 54 and a secondary battery 50 are connected to the wiring 56 via a DC / DC converter 51. In the inverter 54, the power supplied from the fuel cell stack 15 is converted into AC power and supplied to the auxiliary motor 55. The auxiliary motor 55 is a device that is provided in the fuel cell system 12 and is driven by the power generation in the fuel cell stack 15, and the power required for driving increases as the power generation amount in the fuel cell stack 15 increases. A motor for driving a fuel cell auxiliary machine as a device. Specifically, for example, a motor of the air compressor 31, a motor of the fuel gas circulation pump 23, and a motor of the refrigerant circulation pump 42 can be exemplified. The secondary battery 50 discharges to the inverters 52 and 54 when the generated power of the fuel cell stack 15 is insufficient. Further, the secondary battery 50 can be charged by the fuel cell stack 15 and can store the electric power generated by the drive motor 53 acting as a generator during braking of the electric vehicle. In the power supply device 10 of the present embodiment, the voltage at the wiring 56 is adjusted by setting the target voltage value on the output side of the DC / DC converter 51, thereby adjusting the output voltage from the fuel cell stack 15. . As a result, a predetermined amount of power is output from the fuel cell stack 15 and the secondary battery 50.

  The secondary battery 50 is provided with a remaining capacity monitor 57 for detecting the remaining capacity (SOC) of the secondary battery 50. The remaining capacity monitor 57 can be an SOC meter or a voltage sensor that integrates the charging / discharging current value and time in the secondary battery 50.

  Further, the wiring 56 is further connected to another auxiliary device (not shown) related to the fuel cell in parallel with the inverters 52 and 54. Examples of these other auxiliary machines include valves such as the pressure regulating valve 22 that are used in conjunction with power generation in the fuel cell stack 15 and have a driving voltage lower than that of the previously described fuel cell auxiliary machine equipped with a motor. it can. Furthermore, in addition to the auxiliary equipment related to the fuel cell, for example, an air conditioning equipment, lighting equipment, or a car navigation system such as a car navigation system provided in the electric vehicle is connected to the wiring 56 in parallel with the inverters 52 and 54. (Not shown).

  The control unit 60 controls the movement of each unit of the power supply device 10 and the electric vehicle on which the power supply device 10 is mounted. The control unit 60 is configured as a logic circuit centered on a microcomputer, and more specifically, a CPU that executes predetermined calculations in accordance with a preset control program, and controls necessary for executing various arithmetic processes by the CPU. A ROM in which programs and control data are stored in advance, a RAM in which various data necessary for performing various arithmetic processes in the CPU are temporarily read and written, an input / output port for inputting and outputting various signals, and the like . The control unit 60 acquires detection signals from various sensors provided in the power supply device 10 and the electric vehicle, information on a load request for the power supply device 10, and the like. Examples of the sensor that inputs a signal to the control unit 60 include an accelerator opening sensor that detects the accelerator opening of the vehicle, a vehicle speed sensor, a shift position sensor, a brake sensor, or a remaining capacity monitor 57. In addition, the control unit 60 is driven by each unit related to power generation of the fuel cell stack 15 and each unit related to operation in the vehicle, such as the auxiliary motors and other auxiliary machines described above included in the power supply device 10 or vehicle auxiliary machines. Output a signal. The control unit 60 may be configured by a plurality of control units. For example, the control unit 60 is configured by a plurality of control units such as a control unit for controlling the operation of the fuel cell system 12, a control for driving the vehicle, and a control unit for controlling a vehicle auxiliary machine not related to the drive. Necessary information may be exchanged between the control units.

B. Control during driving:
FIG. 2 is a flowchart showing a drive time control processing routine executed in the control unit 60 of the power supply apparatus 10 of the present embodiment. In this routine, after the power supply device 10 is started, specifically, after a predetermined start switch (for example, an ignition switch) in a vehicle on which the power supply device 10 is mounted is turned on, the power supply device 10 is stopped. Is repeatedly executed by the CPU of the control unit 60.

  When this routine is started, the CPU of the control unit 60 acquires detection signals from various sensors provided in the vehicle (step S100). In step S100, in addition to a detection signal related to a load request related to driving of the vehicle (hereinafter also simply referred to as a load request), a signal related to a load request related to the vehicle auxiliary equipment (for example, the vehicle auxiliary equipment is currently consuming). A signal related to the amount of electric power or a signal related to an instruction input by the user to change the operation of the vehicle auxiliary machine is also acquired. Specific examples of the detection signal relating to the load request relating to the driving of the vehicle include detection signals output from the accelerator opening sensor and the vehicle speed sensor. Further, detection signals such as a shift position sensor, a brake sensor, a resolver that detects the rotational speed of the drive motor 53, an acceleration sensor that detects the gradient of the road surface on which the vehicle travels, and a vehicle weight sensor that detects the vehicle weight can be given. .

  Thereafter, the CPU of the control unit 60 derives “necessary power” that is power to be supplied from the power supply device 10 to the drive motor 53 and the vehicle auxiliary machine (step S110). Here, among the “necessary power”, the power to be supplied to the drive motor 53 (hereinafter referred to as drive motor required power) derives the required drive torque in the drive motor 53 based on the sensor detection signal acquired in step S100. And calculated based on the obtained required driving torque. That is, by integrating the required drive torque and the rotation speed of the drive motor 53, the amount of electric power corresponding to the amount of work required for the drive motor 53 can be obtained. Further, among the “necessary power”, the power to be supplied to the vehicle accessory (hereinafter referred to as “vehicle accessory required power”) is obtained based on the signal related to the use state of the vehicle accessory acquired in step S100. The “required power” is obtained as the sum of the required power of the drive motor and the required power of the vehicle auxiliary equipment.

  Next, the CPU of the control unit 60 compares the “required power” obtained in step S110 with the maximum output in the fuel cell system 12 (step S120). Here, the maximum output in the fuel cell system 12 is the maximum value of the electric power that can be output from the fuel cell system 12 when generating power in a steady state where the fuel cell stack 15 has been heated to a predetermined temperature range. Say. When the fuel cell stack 15 generates power, the fuel cell auxiliary machine described above and other auxiliary machines related to the power generation of the fuel cell consume power. The power output by the fuel cell system 12 is power obtained by subtracting the power consumption of the fuel cell auxiliary machine and other auxiliary machines from the power generation amount of the fuel cell stack 15.

  If it is determined in step S120 that the “necessary power” exceeds the maximum output in the fuel cell system 12, the fuel cell system 12 cannot cover all the power to be output from the power supply device 10. . In this case, the CPU of the control unit 60 corrects the drive motor power requirement value to a smaller value so that the “required power” is equal to or less than the maximum output in the fuel cell system 12 (step S130). In order to realize a traveling state that is closer to the request from the driver of the vehicle, for example, the “necessary power” may be corrected so that the maximum output in the fuel cell system 12 becomes equal. Specifically, a value obtained by subtracting the vehicle auxiliary machine required power from the maximum output in the fuel cell system 12 may be set as the drive motor required power. Note that, as a measure for reducing the value of “required power”, it is conceivable to reduce not only the drive motor required power but the vehicle auxiliary power required power. However, since the vehicle auxiliary machine power requirement is normally much smaller than the drive motor power requirement, in this embodiment, correction is performed to reduce only the drive motor power requirement.

  After correcting the value of the drive motor required power in step S130, or when determining that the “required power” is equal to or less than the maximum output in the fuel cell system 12 in step S120, the CPU of the control unit 60 “ When the “response time” has elapsed, the drive amount of each part is set so that the output power from the fuel cell system 12 becomes equal to the “necessary power” (step S140).

  Here, the “reference response time” is an acceleration required for the vehicle as a response time from when the accelerator is depressed in the vehicle to request an increase in driving power until the requested power is actually output. It is determined based on performance. This “reference response time” is determined for each timing of control based on “a value reflecting the current output state” and “a value reflecting the target output state” obtained based on the load request. Desired. In this embodiment, a map for obtaining the “reference response time” using the current vehicle speed and the accelerator opening as parameters is stored in the controller 60 in advance, and the “reference response time” is referred to with reference to this map. Is required. Note that the “reference response time” includes, in addition to a map using the current vehicle speed and accelerator opening as parameters, for example, the current rotational speed of the motor of the air compressor 31 and the target rotational speed of the motor of the air compressor 31 are parameters. A map using the current rotational speed of the air compressor 31 and the target rotational speed of the air compressor 31 as parameters, a map using the current supply oxidizing gas amount and the target supply oxidizing gas amount as parameters, and the like. Also good.

  In step S140, specifically, the power generation in the fuel cell stack 15 when the “reference response time” has elapsed so that the output power from the fuel cell system 12 reaches “required power” when the “reference response time” has elapsed. Set the target value of fuel (fuel cell output target value). Further, the target value of the power generation amount of the fuel cell stack 15 at a plurality of time points within the “reference response time” is set so that the fuel cell stack 15 can generate the fuel cell output target value when the “reference response time” has elapsed. At the same time, the driving amount of each part included in the fuel gas supply / discharge section 20, the oxidizing gas supply / discharge section 30, and the refrigerant supply / discharge section 40 when the fuel cell stack 15 generates the set target value is set. Further, the CPU of the control unit 60 causes the DC / DC converter 51 at a plurality of time points within the “reference response time” so that the fuel cell stack 15 can output the fuel cell output target value when the “reference response time” has elapsed. Set the target voltage value. Note that the driving amount of each part included in the oxidizing gas supply / discharge unit 30 set here includes the driving amount of the air compressor 31. Further, the CPU of the control unit 60 drives the drive motor 53 at a plurality of time points within the “reference response time” so that the drive motor 53 is in a driving state in which the drive motor power consumption is consumed when the “reference response time” has elapsed. Set the amount.

  FIG. 3 is an explanatory diagram conceptually showing how power consumption in the air compressor 31 increases when the vehicle is accelerated. When the accelerator is depressed while the vehicle is traveling, the amount of power generated in the fuel cell stack 15 is the fuel cell described above when the “reference response time” has elapsed from the amount of power generated at the start of accelerator depression (hereinafter referred to as the initial power generation). Increase to reach the output target value. At this time, the power consumption in the air compressor 31 is also changed from the power consumption corresponding to the drive amount for generating the initial power generation amount (power value A shown in FIG. 3) to the drive amount for generating the fuel cell output target value. The power consumption increases to the corresponding power consumption (power value B shown in FIG. 3) within the “reference response time”. In FIG. 3, a state in which the power consumption corresponding to the work amount in the air compressor 31 increases is indicated by a solid line.

  Next, the CPU of the control unit 60 derives auxiliary machine acceleration power (step S150). Auxiliary acceleration power is used to increase the amount of power generated by the fuel cell stack 15 so that the fuel cell output target value is reached when the “reference response time” has elapsed. The amount of electric power required by the fuel cell auxiliary machine, specifically, the fuel cell auxiliary motor 55, exceeds the electric power corresponding to the work amount in the fuel cell auxiliary machine. Here, as described above, the fuel cell auxiliary machine includes the fuel gas circulation pump 23 and the refrigerant circulation pump 42 in addition to the air compressor 31. However, in the present embodiment, in particular, the acceleration power for the air compressor 31, which is an auxiliary machine that consumes a large amount of power and has high followability of the driving amount with respect to the change in the amount of power generation in the fuel cell stack 15, It is said.

  In FIG. 3 described above, the auxiliary acceleration power in the air compressor 31 is indicated by a one-dot chain line. Such auxiliary component acceleration power is generated by the inertial force (inertia) accompanying rotation in the air compressor 31 and the motor that drives the air compressor 31. In the present embodiment, the current rotational speed of the motor of the air compressor 31 and the target rotational speed of the motor of the air compressor 31 (the oxidation to be supplied when the fuel cell stack 15 generates electric power corresponding to the fuel cell output target value). A map for obtaining the power for accelerating the auxiliary machine is created in advance and stored in the control unit 60 using the parameter (the number of revolutions of the motor of the air compressor 31 corresponding to the gas amount) and the “reference response time” as parameters. In step S150, the auxiliary acceleration power is derived with reference to this map. In the present embodiment, a sensor for detecting the current rotational speed of the motor of the air compressor 31 is provided in the motor of the air compressor 31. In step S150, a detection signal of this sensor is acquired. Instead of providing a rotation speed sensor in the motor of the air compressor 31, the rotation speed of the air compressor motor may be derived based on a drive signal output to the air compressor motor. Further, instead of the current rotation speed and the target rotation speed in the air compressor motor, the auxiliary acceleration power may be derived using the current rotation speed and the target rotation speed in the air compressor 31.

  When the auxiliary acceleration power is derived, the CPU of the control unit 60 obtains the current output power of the secondary battery 50 and derives the secondary battery allowable output that is the maximum power that can be output by the secondary battery. (Step S160). The current output power of the secondary battery 50 is obtained based on the current output current and the current output voltage of the secondary battery 50. In order to measure the output current and output voltage of the secondary battery 50, a current sensor and a voltage sensor (not shown) are connected to the wiring 56 of the power supply device 10, and the control unit 60 receives detection signals from these sensors. get. Further, the allowable output of the secondary battery is determined by the remaining capacity of the secondary battery 50 and the temperature of the secondary battery 50. The control unit 60 of this embodiment includes the remaining capacity of the secondary battery 50 and the secondary battery 50. A map created by examining the relationship between the temperature of the battery 50 and the allowable output of the secondary battery in advance is stored. The secondary battery 50 is provided with a temperature sensor (not shown) that detects the temperature of the secondary battery 50 in addition to the remaining capacity monitor 57. In step S160, the CPU of the control unit 60 obtains detection signals from the remaining capacity monitor 57 and the temperature sensor, and derives a secondary battery allowable output by referring to the map.

  In the present embodiment, the required power that is the sum of the drive motor required power and the vehicle auxiliary machine required power is output from the fuel cell system 12 in principle. The output from the secondary battery 50 is theoretically absent. However, in reality, an error occurs between the output power from the fuel cell system 12 and the required power, and the power corresponding to the error is absorbed by the secondary battery 50, so that the power supply apparatus 10 as a whole has the required power. Can be supplied. Hereinafter, as an example of a configuration in which the secondary battery 50 absorbs an error, a configuration in which the secondary battery 50 supplies power that is insufficient with the output from the fuel cell system 12 will be described.

  FIG. 4 is an explanatory diagram showing current-voltage characteristics in the fuel cell stack 15. The current-voltage characteristics of the fuel cell stack 15 are affected by the temperature of the fuel cell stack 15 and the amount of gas supplied to the fuel cell stack 15. The operating point of the fuel cell stack 15 is set as a point at which power required for the fuel cell stack 15 can be generated based on the current-voltage characteristics of the fuel cell stack 15 at that time. In FIG. 4, the current-voltage characteristic of the fuel cell stack 15 is determined to be represented by the graph (A), and is set as an operation point of the fuel cell stack 15 when the power required for the fuel cell stack 15 is 5000 W. The point to be played is shown as point (i). When power generation is performed at such an operation point (i), the target voltage value of the DC / DC converter 51 is set to 100 V so that a sufficient amount of fuel gas and oxidizing gas are supplied to the fuel cell stack 15. In addition, each part related to gas supply is driven. However, for example, if the supply gas amount becomes insufficient for some reason, the current-voltage characteristic in the fuel cell stack 15 is not the graph (A) but the graph (B). In this case, if the output current of the fuel cell stack 15 is set to 50 A which is the same as the point (i), the output voltage will be lower than 100V. At this time, in the power supply device 10, since the output voltage is set by the DC / DC converter 51 and the secondary battery 50 is connected in parallel, the current-voltage characteristic is not the graph (A) but the graph (B ), The operating point of the fuel cell stack 15 is a point (ii) corresponding to the set voltage 100V in the graph (B). Then, the amount of output power of the fuel cell stack 15 that is insufficient at the operation point (ii) in the graph (B) is output from the secondary battery 50. On the contrary, when the output power of the fuel cell stack 15 is excessive, the secondary battery 50 is charged with the excess power. Thus, the secondary battery 50 functions as a buffer that inputs and outputs errors that occur when controlling the output power from the fuel cell stack 15. The power corresponding to the error input / output by the secondary battery 50 is the output power of the secondary battery 50 acquired in step S160.

  In step S160, when the output of the secondary battery 50 is acquired and the secondary battery allowable output is derived, the CPU of the control unit 60 determines that the secondary battery allowable output has a control error in the auxiliary machine acceleration power obtained in step S150. It is determined whether or not the value is equal to or greater than the value obtained by adding the divided power (α) (step S170). Here, the control error power (α) is compensated from the secondary battery due to an error in power generation control of the fuel cell stack 15 when desired power is output from the power supply device 10 as described above. It is necessary electric power. In step S170, it is determined whether or not both the control error power (α) and the auxiliary acceleration power can be output from the secondary battery 50. However, since the value of the control error power (α) is determined by an error that occurs when the fuel cell system 12 is actually controlled, it cannot be accurately known in advance. Therefore, in this embodiment, the current output power of the secondary battery 50 acquired in step S160 is used as the control error power (α) in step S170 as a temporary guide value. A value different from the current output power of the secondary battery 50, specifically, a larger value may be used as the control error power (α). For example, if the maximum value assumed as the control error power output from the secondary battery 50 is used in the vehicle of this embodiment equipped with the power supply device 10, the output from the secondary battery 50 is insufficient. The inconvenience caused by this can be sufficiently suppressed.

  When it is determined in step S170 that the allowable output of the secondary battery is equal to or greater than the value obtained by adding the control error power (α) to the auxiliary machine acceleration power, the CPU of the control unit 60 determines whether the drive motor is required in step S130. It is determined whether or not power suppression has been performed (step S180). When it is determined in step S180 that the drive motor power requirement is not suppressed, the CPU of the control unit 60 drives each unit during the “reference response time” based on the drive amount set in step S140. A signal is output (step S190), and this routine is terminated. Specifically, based on the driving amount set in step S140 for a plurality of time points within the “reference response time” so that the “required power” can be output from the fuel cell system 12 after the “reference response time”, Drive signals are output to the fuel gas supply / discharge unit 20, the oxidizing gas supply / discharge unit 30, the refrigerant supply / discharge unit 40, the DC / DC converter 51, and the like. Further, a “reference response time” is provided to the inverter 52 and each vehicle accessory so that the drive motor 53 consumes the drive motor required power and the vehicle accessory consumes the vehicle accessory required power. A drive signal is output based on the drive amount set in step S140 for a plurality of time points. Thus, in principle, all the necessary power is output from the fuel cell system 12, and the auxiliary acceleration power and control error power required at this time are output from the secondary battery 50. .

  The case where it is determined in step S180 that the drive motor power requirement has been suppressed is the case where it is determined in step S120 that the “necessary power” exceeds the maximum output in the fuel cell system 12. Then, in step S130, the value of the drive motor power requirement is corrected to a value smaller than the value corresponding to the load request so that the “necessary power” is equal to or less than the maximum output in the fuel cell system 12. In this case, the CPU of the control unit 60 sets the driving amount of each unit set in step S140 so that the driving force is assisted by surplus power in the secondary battery 50 (hereinafter referred to as secondary battery surplus power). Correction is performed (step S200). Here, the secondary battery surplus power is a value obtained by subtracting the auxiliary acceleration power and the control error power from the secondary battery allowable output. In step S130, when the drive control is performed by correcting the drive motor power requirement to a value smaller than the value according to the load request, sufficient output power (acceleration in the vehicle) according to the load request cannot be obtained. However, in this embodiment, when there is surplus power of the secondary battery, the surplus power of the secondary battery is supplied to the drive motor 53 so that the output power from the drive motor 53 approaches a value corresponding to the load request. ing. In step S200, the drive motor at a plurality of time points within the “reference response time” within a range where the power supplied from the secondary battery 50 to the drive motor 53 when the “reference response time” has elapsed is less than or equal to the secondary battery surplus power. The set value of the driving amount 53 is corrected. When the secondary battery surplus power is sufficiently large, by supplying the secondary battery surplus power to the drive motor 53, the value corresponding to the load request before suppressing the output power from the drive motor 53 in step S130. It can also be.

  Thereafter, based on the corrected drive amount, a drive signal is output to each unit (step S190), and this routine is terminated. In step S190, a drive signal based on the drive amount of the drive motor 53 corrected in step S200 is output to the inverter 52, and a drive signal based on the result corrected in step S130 is output from the DC / DC converter 51 and the fuel cell system 12. Output to each part. As a result, the fuel cell output target value set by correcting the suppression in step S130 is generated from the fuel cell stack 15, and the drive motor 53 is more than the drive motor required power suppressed in step S130. Many are driven to consume the power corrected in step S200. As a result, all the output from the fuel cell system 12 is consumed as necessary power, and the output from the secondary battery 50 is used as power for accelerating auxiliary equipment and power for controlling error, in addition to the drive motor. 53 is used to generate the driving force at 53.

  Further, when it is determined in step S170 that the allowable output of the secondary battery is less than the value obtained by adding the control error power (α) to the auxiliary acceleration power, the fuel cell system 12 determines that “required power”. Even if the power supply device 10 is controlled so as to output the secondary battery 50, the secondary battery 50 cannot output the power for accelerating the auxiliary machine, so that a desired output cannot be obtained. In this case, the CPU of the control unit 60 compensates for increasing the output power from the fuel cell system 12 to “required power” (corrected “required power” when corrected in step S130). The response time is corrected to a time longer than the “reference response time” so that the machine acceleration component power can be output by the secondary battery 50 (step S210). Specifically, first, by subtracting the control error power (α) from the secondary battery allowable output, the power that can be output from the secondary battery 50 as the auxiliary machine acceleration power (hereinafter referred to as “usable power during acceleration”). )). In the present embodiment, the shortest response within an allowable range using “accelerated usable power”, the current rotational speed of the motor of the air compressor 31, and the target rotational speed of the motor of the air compressor 31 as parameters. A map for obtaining the time is created in advance and stored in the control unit 60. In step S210, the obtained “usable power during acceleration” is used to refer to this map and correct the response time to the shortest acceptable time, although it is longer than the “reference response time”.

  Next, the CPU of the control unit 60 corrects the driving amount of each unit set in step S140 based on the response time corrected in step S210 (step S220). That is, the target value of the power generation amount of the fuel cell stack 15 at a plurality of time points within the corrected response time is set so that the power generation amount of the fuel cell stack 15 reaches the fuel cell output target value when the corrected response time has elapsed. At the same time, the drive amount of each part included in the fuel gas supply / discharge unit 20, the oxidizing gas supply / discharge unit 30, and the refrigerant supply / discharge unit 40 when the fuel cell stack 15 generates the set target value is set. Further, the CPU of the control unit 60 sets the target of the DC / DC converter 51 at a plurality of time points within the corrected response time so that the fuel cell stack 15 can output the fuel cell output target value when the corrected response time elapses. Set the voltage value. Further, the CPU of the control unit 60 determines the drive amount of the drive motor 53 at a plurality of time points within the corrected response time so that the drive motor 53 is in a driving state in which the drive motor power consumption is consumed when the corrected response time has elapsed. Set.

  Thereafter, the CPU of the control unit 60 outputs a drive signal to each unit based on the drive amount corrected in step S220 (step S190), and ends this routine. As a result, “necessary power” is output from the fuel cell system 12 when the corrected response time has elapsed. That is, in principle, “necessary power” is in a state of being output from the fuel cell system 12, and the auxiliary acceleration power and control error power required at this time are output from the secondary battery 50. Become.

  In the above description, the case where it is necessary to output the driving force from the driving motor 53 by depressing the accelerator of the vehicle has been described. However, different driving states may be considered. For example, when various sensor detection signals are input in step S100 and the accelerator opening is 0, the drive motor power requirement is 0. In this case, the control according to FIG. 2 is performed using the vehicle auxiliary machine required power as the required power. When the required power is only the vehicle auxiliary machine required power as described above, even if the vehicle auxiliary machine required power is increasing, the auxiliary machine acceleration power can normally be ignored. Further, when the accelerator opening is 0, the vehicle is running, and the brake pedal is depressed, the drive motor 53 can be operated as a generator to charge the secondary battery 50 with regenerative power.

  According to the power supply device 10 of the present embodiment configured as described above, when power is supplied from the fuel cell system 12 to the drive motor 53, the auxiliary acceleration power is obtained and output from the secondary battery 50. Since the electric power is secured to cover the auxiliary equipment acceleration power, the auxiliary equipment acceleration power will not be insufficient. Therefore, when the load demand increases, the required amount of oxidizing gas can be supplied to the fuel cell stack 15 without any trouble, and the output power of the fuel cell system 12 can be increased with sufficient responsiveness. In particular, in this embodiment, the output from the secondary battery 50 is not distributed to the drive motor 53 in principle. Therefore, it is possible to further improve the reliability of the operation of securing the auxiliary acceleration power by the secondary battery 50.

  FIG. 5 shows a case where the control of this embodiment is performed and the control of the comparative example is performed when an instruction input for increasing the load request (depressing the accelerator) is made in the vehicle equipped with the power supply device 10 of FIG. The result of having performed simulation about an example of a mode that the electric power (driving power) input from the power supply device 10 to the drive motor 53 increases is shown. In the control of this embodiment, “required power” (drive motor required power + vehicle auxiliary machine required power) is set within the output range of the fuel cell system 12, and the output from the secondary battery 50 is driven in principle. The secondary battery 50 is a control performed so as to cover only the derived auxiliary machine acceleration component power and control error power (α) without being distributed to the motor 53. In the control of the comparative example, when the “necessary power” corresponding to the load request cannot be covered only by the output from the fuel cell system, the output from the secondary battery 50 is also distributed to the drive motor 53 and supplementary. The machine acceleration component power is control that is included in the control error component power (α) without being particularly calculated. As shown in FIG. 5, when the control of the comparative example is performed, the drive power is supplied by supplying power from the secondary battery 50 to the drive motor 53 immediately after an instruction input for increasing the load request is received. Increases rapidly (time represented as section A in FIG. 5). However, after that, the output voltage of the fuel cell stack 15 decreases due to the shortage of the auxiliary acceleration power. As a result, an increase in output power from the fuel cell stack 15 is suppressed, and an increase in drive power is also suppressed (time represented as section B in FIG. 5). In this way, since the increase in driving power is suppressed and the response time is prolonged, the acceleration of the auxiliary equipment is also suppressed, and thereafter, the driving power increases again without any trouble (denoted as section C in FIG. 5). Time). On the other hand, when the control of the present embodiment is performed, control to distribute the auxiliary acceleration power to the secondary battery is performed, and power supply from the secondary battery 50 to the drive motor 53 is not performed in principle. As a result, the auxiliary battery acceleration power is secured in the secondary battery. Therefore, the fuel cell output voltage is not lowered due to the shortage of auxiliary machine acceleration power, and the driving power can be increased without any trouble. As a result, it is possible to improve the responsiveness to the instruction input for increasing the load request as compared with the case of performing the control of the comparative example.

  Further, in this embodiment, since the obtained auxiliary machine acceleration power is secured not at the output from the fuel cell system 12 but at the output from the secondary battery 50, the auxiliary machine acceleration power is secured. As a result, the output from the drive motor 53 is not limited. Therefore, the size of the fuel cell stack 15 (the upper limit value of the output power of the fuel cell system 12) is set in accordance with the output range required by the drive motor 53 without considering the magnitude of the auxiliary machine acceleration power. Can be set. Further, if the output of the secondary battery 50 is sufficiently secured, the air compressor 31 that is a fuel cell auxiliary machine (auxiliary machine) that operates at a higher speed without changing the size of the fuel cell stack 15. It is possible to use a device that increases the acceleration power, and the fuel cell auxiliary machine can be downsized.

  In this embodiment, when the secondary battery allowable output is insufficient with respect to the derived auxiliary machine acceleration power, the auxiliary machine acceleration power is suppressed by increasing the response time. As a result, even when it is determined that the allowable output of the secondary battery is not sufficient, it is possible to suppress inconveniences that occur in the operation of increasing the output due to insufficient power for accelerating the auxiliary machine.

  Furthermore, in the present embodiment, in principle, power is not supplied from the secondary battery 50 to the drive motor 53, but when there is surplus power from the secondary battery, power can be supplied also from the secondary battery 50 to the drive motor 53. Yes. Therefore, when the auxiliary motor acceleration power does not become insufficient, and the output from the fuel cell system 12 alone cannot cover the drive motor required power corresponding to the load request, a part of the drive power is generated by the secondary battery 50. Can be output. As a result, even when the output power from the fuel cell system 12 is insufficient, it is possible to obtain output power closer to the load request, specifically, to obtain acceleration closer to the load request in the vehicle. . In this embodiment, if the required power of the secondary battery has a margin when the drive motor required power is suppressed because the output power from the fuel cell system 12 is insufficient, the secondary battery 50 assists the drive. However (step S200), the drive assist may not be performed. Even in this case, the response time for increasing the output from the power supply device 10 can be obtained by deriving the auxiliary acceleration power and controlling the auxiliary acceleration power in the secondary battery 50. An effect of suppressing the delay can be obtained.

C. Second embodiment:
In the first embodiment, the secondary battery allowable output is equal to or greater than the value obtained by adding the control error power (α) to the auxiliary machine acceleration power (step S170), and the drive motor power requirement in step S130 is suppressed. If it is determined that it is not (step S180), a drive signal is output to each unit based on the drive amount set in step S140 (step S190), but a different configuration may be used. A configuration for performing other control will be described below as a second embodiment. The control of the second embodiment is executed in the power supply device 10 similar to that of the first embodiment. FIG. 6 is a flowchart showing a process executed in the control unit 60 of the power supply apparatus 10 of the second embodiment in place of the drive time control process routine of the first embodiment shown in FIG. In FIG. 6, steps common to those in FIG. 2 are denoted by the same step numbers, and detailed description thereof is omitted. In the following, only the portions that perform control different from the first embodiment will be described.

  In the second embodiment, the allowable output of the secondary battery is equal to or greater than the value obtained by adding the control error power (α) to the auxiliary machine acceleration power (step S170), and the drive motor power requirement in step S130 is suppressed. If it is determined that the response time has not been reached (step S180), correction is performed so that the response time is shorter than the “reference response time”, and the drive amount of each unit is set (step S300). That is, when the drive motor required power can be provided by the fuel cell system 12, and the auxiliary battery acceleration power corresponding to the drive motor required power can be provided by the secondary battery 50, the secondary battery surplus power is used. The response time is shortened to further improve the response to the load request.

  When the response time is made shorter, the auxiliary machine acceleration power in the air compressor 31 increases. As described above, the auxiliary machine acceleration power is determined by the current rotational speed of the motor of the air compressor 31 and the target rotational speed of the motor of the air compressor 31. Therefore, in step S300 of the present embodiment, first, “accelerated usable power” is obtained by subtracting the control error power (α) from the secondary battery allowable output. Further, the control unit 60 of the present embodiment uses the “standard power available during acceleration”, the current rotational speed of the motor of the air compressor 31, and the target rotational speed of the motor of the air compressor 31 as parameters. A map for determining the shortest allowable response time that is shorter than the “response time” is created and stored in advance. In step S300, the obtained “accelerated usable electric power” is used to refer to this map, and the response time is reduced to the shortest time within a range in which the auxiliary machine acceleration component electric power does not exceed the “accelerated usable electric power”. Is corrected from the “reference response time”.

  In step S300, the CPU of the control unit 60 corrects the response time to be shortened as described above, and corrects the driving amount of each unit set in step S140 based on the corrected response time. That is, the target value of the power generation amount of the fuel cell stack 15 at a plurality of time points within the corrected response time is set so that the power generation amount of the fuel cell stack 15 reaches the fuel cell output target value when the corrected response time has elapsed. At the same time, the drive amount of each part included in the fuel gas supply / discharge unit 20, the oxidizing gas supply / discharge unit 30, and the refrigerant supply / discharge unit 40 when the fuel cell stack 15 generates the set target value is set. Further, the CPU of the control unit 60 sets the target of the DC / DC converter 51 at a plurality of time points within the corrected response time so that the fuel cell stack 15 can output the fuel cell output target value when the corrected response time elapses. Set the voltage value. Further, the CPU of the control unit 60 determines the drive amount of the drive motor 53 at a plurality of time points within the corrected response time so that the drive motor 53 is in a driving state in which the drive motor power consumption is consumed when the corrected response time has elapsed. Set. After setting the drive amount of each unit based on the response time corrected in step S300, the CPU of the control unit 60 outputs a drive signal based on the corrected drive amount to each unit (step S190), and ends this routine. To do. As a result, when the shortened correction response time elapses, all the necessary power is output from the fuel cell system 12, and the auxiliary acceleration power and control error power required at this time are output from the secondary battery 50. It becomes a state to be.

  According to the power supply device 10 of the second embodiment configured as described above, it is possible to obtain the effect of suppressing shortage of auxiliary machine acceleration power as in the first embodiment. Furthermore, according to the power supply device 10 of the second embodiment, when the output of the secondary battery 50 has a margin, the response time to the load request is further improved by correcting the response time to be shorter than the “reference response time”. Can be improved.

D. Third embodiment:
In the first embodiment, when the allowable output of the secondary battery is less than the value obtained by adding the control error power (α) to the auxiliary machine acceleration power (step S170), the response time is set to be longer than the “reference response time”. Although corrected to a long time, a different configuration may be used. A configuration for performing other control will be described below as a third embodiment. The control of the third embodiment is executed in the power supply apparatus 10 similar to that of the first embodiment. FIG. 7 is a flowchart showing a process executed by the control unit 60 of the power supply device 10 of the third embodiment in place of the drive time control process routine of the first embodiment shown in FIG. In FIG. 7, the same steps as those in FIG. 2 are denoted by the same step numbers, and detailed description thereof is omitted. In the following, only the portions that perform control different from the first embodiment will be described.

  In the third embodiment, when it is determined that the allowable output of the secondary battery is less than the value obtained by adding the control error power (α) to the auxiliary machine acceleration power (step S170), the CPU of the control unit 60 When the required power of the drive motor is increased with the response time as the “reference response time”, the auxiliary motor acceleration power is “accelerated power that can be used during acceleration” (secondary battery allowable output to control error power (α) Correction for suppressing the drive motor power requirement is performed so as to be equal to or less (step S410). In step S410, prior to correcting the drive motor power requirement, first, correction for suppressing the target rotational speed of the motor of the air compressor 31 is performed. That is, in this embodiment, the motor of the air compressor 31 as the maximum value that can be reached when the response time elapses, with the response time, the current rotation speed of the motor of the air compressor 31 and the auxiliary component acceleration power as parameters. A map for obtaining the target rotational speed is stored in the controller 60 in advance. In step S420, the auxiliary battery acceleration power is provided by the secondary battery 50 by referring to the map with the response time set as “reference response time” and the auxiliary machine acceleration electric power as “usable power during acceleration”. As a possible upper limit value, the motor target rotational speed of the air compressor 31 is corrected. Here, the rotation speed of the motor of the air compressor 31 is a value determined by the output of the drive motor 53, and the correspondence between the two is stored in the controller 60 in advance. Therefore, in step S410, the auxiliary acceleration power is set as a value corresponding to the corrected motor target rotational speed of the air compressor 31 based on the relationship between the motor rotational speed of the air compressor 31 and the output of the drive motor 53. The drive motor power requirement as an upper limit value that can be covered by the secondary battery 50 is derived. In step S410, the response time, the current motor speed of the air compressor 31 and the auxiliary acceleration power are used as parameters, and the upper limit at which the auxiliary battery acceleration power can be covered by the secondary battery 50. It is also possible to use a map that directly obtains the drive motor power requirement as a value. Alternatively, as a parameter representing the current driving state of the air compressor 31, for example, the power consumption of the current driving motor 53 may be used instead of the current rotational speed of the motor of the air compressor 31. That is, the drive motor required power as an upper limit value that can provide the auxiliary acceleration power by the secondary battery 50 using the response time, the current power consumption in the drive motor, and the auxiliary acceleration power as parameters. It is good also as using the map which calculates | requires.

  Next, the CPU of the control unit 60 corrects the drive amount of each unit set in step S140 based on the required drive motor power corrected in step S410 (step S420). That is, the fuel cell is configured so that the output power from the fuel cell system 12 becomes the “necessary power” that is the sum of the drive motor required power and the vehicle auxiliary machine required power that are corrected in a restraint manner when the “reference response time” has elapsed. Set the output target value. Then, based on the set fuel cell output target value, the target value of the power generation amount of the fuel cell stack 15 at a plurality of time points within the “reference response time” is set. Further, the drive amount of each part included in the fuel gas supply / discharge unit 20, the oxidizing gas supply / discharge unit 30, and the refrigerant supply / discharge unit 40 when the fuel cell stack 15 generates the set target value is set. Further, the CPU of the control unit 60 causes the DC / DC converter 51 at a plurality of time points within the “reference response time” so that the fuel cell stack 15 can output the fuel cell output target value when the “reference response time” has elapsed. Set the target voltage value. Further, the CPU of the control unit 60 drives the drive motor at a plurality of time points within the “reference response time” so that when the “reference response time” elapses, the drive motor 53 consumes the power required for the drive motor corrected. A drive amount of 53 is set. After correcting the drive amount of each unit based on the drive motor power requirement corrected in step S410, the CPU of the control unit 60 outputs a drive signal based on the corrected drive amount to each unit (step S190), and this routine Exit. As a result, when the “reference response time” has elapsed, all the necessary power corrected in a restraint state is output from the fuel cell system 12, and the auxiliary acceleration component power corrected in a restraint necessary at this time and The control error power is output from the secondary battery 50.

  According to the power supply device 10 of the third embodiment configured as described above, it is possible to obtain the effect of suppressing the shortage of auxiliary machine acceleration power as in the first embodiment. Furthermore, according to the power supply device 10 of the third embodiment, when the allowable output of the secondary battery is insufficient with respect to the derived auxiliary acceleration power, the secondary battery 50 covers the auxiliary acceleration electric power. Therefore, correction is performed to reduce the drive motor power requirement. As a result, even when it is determined that the allowable output of the secondary battery is not sufficient, it is possible to suppress inconveniences that occur in the operation of increasing the output due to insufficient power for accelerating the auxiliary machine.

E. Fourth embodiment:
In the first to third embodiments, when the “required power” is covered by the fuel cell system 12, the auxiliary acceleration power is controlled to be output from the secondary battery 50 and is derived from the “required power”. When the auxiliary machine acceleration power increases to such an extent that it cannot be output from the secondary battery 50, the drive motor required power and response time are set so that the auxiliary machine acceleration power is reduced to such an extent that it can be output from the secondary battery 50. Is corrected. Here, if the allowable output of the secondary battery is sufficiently large, it is possible to output the auxiliary acceleration power from the secondary battery 50 without performing the above-described correction for reducing the auxiliary acceleration power. . In this way, a configuration for performing control so as to maintain the secondary battery allowable output in the secondary battery 50 at a value that can cover the power for accelerating the auxiliary equipment even when the load demand increases is described below as a fourth embodiment. Explained. The control of the fourth embodiment is executed in the power supply apparatus 10 similar to that of the first embodiment.

  FIG. 8 is a flowchart showing a driving charge control processing routine executed in the control unit 60 of the power supply device 10 of the fourth embodiment in place of the driving control processing routine of the first embodiment shown in FIG. . When this routine is started, the CPU of the control unit 60 acquires various sensor detection signals (step S500). This step is the same as step S100 of the first embodiment. Thereafter, the CPU of the control unit 60 derives “required power” that is power to be supplied from the power supply device 10 to the drive motor 53 and the vehicle auxiliary machine (step S510). This step is the same as step S110 in the first embodiment. When the “required power” is derived, the CPU of the control unit 60 obtains the current output power of the secondary battery 50 and derives the secondary battery allowable output that is the maximum value that the secondary battery can output (step). S520). This step is the same as step S160 in the first embodiment.

  Thereafter, the CPU of the control unit 60 determines whether or not the secondary battery allowable output derived in step S520 is less than the sum of the “maximum value of auxiliary machine acceleration power” and the control error power (α). Is determined (step S530). Here, the “maximum value of auxiliary acceleration power” is the maximum value that can be taken as the value of auxiliary acceleration power under all operating conditions assumed in the power supply device 10 of the embodiment. Here, the power for accelerating the auxiliary machine can be obtained based on the rotation speed before the output of the motor of the air compressor 31 is increased, the target rotation speed after the output is increased, and the response time. In the present embodiment, based on the “reference response time” in which the vehicle speed and the accelerator opening are set as parameters in the range of travel conditions and load demands that can be considered in the vehicle, and the number of revolutions that the motor of the air compressor 31 can take. , “The maximum value of auxiliary power for acceleration” is calculated in advance and stored in the control unit 60. Further, the control error power (α) used in step S530 is power that needs to be compensated from the secondary battery 50 due to the error in the power generation control of the fuel cell stack 15 as described above. In the present embodiment, as in the first embodiment, the current output power of the secondary battery 50 acquired in step S520 is used as the control error power (α).

  In step S530, when it is determined that the allowable output of the secondary battery is equal to or greater than the sum of the maximum value of the auxiliary acceleration power and the control error power (α), the load requirement increases and the auxiliary acceleration is increased. Even when the divided power reaches the maximum value, the auxiliary battery acceleration power can be covered by the secondary battery 50. In this case, the CPU of the control unit 60 compares the “necessary power” obtained in step S510 with the maximum output in the fuel cell system 12 (step S540). This step is the same as step S120 in the first embodiment.

  If it is determined in step S540 that the maximum output in the fuel cell system 12 is equal to or greater than “required power”, “required power” for obtaining vehicle driving force that satisfies the load requirement is output from the fuel cell system 12. Will be able to. In this case, the CPU of the control unit 60 sets the drive amount of each unit so that the output power from the fuel cell system 12 becomes equal to the “necessary power” when the “reference response time” has elapsed (step S550). ). This step is the same as step S140 of the first embodiment.

  Thereafter, the CPU of the control unit 60 outputs a drive signal to each unit during the “reference response time” based on the drive amount set in step S550 (step S560), and ends this routine. This step is the same as step S190 in the first embodiment. At this time, all the “necessary power” is output from the fuel cell system 12, and the auxiliary acceleration power and the control error power are output from the secondary battery 50.

  In step S540, if it is determined that the maximum output in the fuel cell system 12 is less than the “required power”, the “required power” for obtaining the vehicle driving force that satisfies the load requirement is determined as the fuel cell system 12. Cannot be output. In this case, the CPU of the control unit 60 corrects the value of the drive motor required power to a smaller value so that the “required power” is equal to or less than the maximum output in the fuel cell system 12 (step S570). . This step is the same as step S130 in the first embodiment. Thereafter, the CPU of the control unit 60 sets the drive amount of each unit so that the output power from the fuel cell system 12 becomes equal to the “necessary power” corrected in step S570 when the “reference response time” has elapsed. (Step S550). Then, based on the drive amount set in step S550, during the “reference response time”, a drive signal is output to each unit (step S560), and this routine is terminated. At this time, control is performed so that all the “necessary power” corrected to a smaller value is output from the fuel cell system 12, and the auxiliary acceleration power and control error power (α) are output from the secondary battery 50. Will be performed.

  Further, when it is determined in step S530 that the allowable output of the secondary battery is less than the sum of the maximum value of the auxiliary machine acceleration power and the control error power (α), the auxiliary machine is increased along with an increase in load demand. When the acceleration component power increases, the secondary battery 50 may not be able to cover the auxiliary component acceleration component power. In this case, the CPU of the control unit 60 performs control for charging the secondary battery 50 by the fuel cell system 12. Specifically, the CPU of the control unit 60 first derives the required charge amount in the secondary battery 50 (step S580). Here, the required charge amount in the secondary battery 50 can be obtained as a value obtained by subtracting the maximum value of auxiliary machine acceleration power and the control error power (α) from the secondary battery allowable output. When the necessary charge amount is derived, the CPU of the control unit 60 corrects the “necessary power” by adding the necessary charge amount (step S590). Then, the corrected “required power” is compared with the maximum output in the fuel cell system 12 (step S600).

  In step S600, when it is determined that the maximum output in the fuel cell system 12 is equal to or greater than the corrected “required power”, the fuel cell system 12 together with the power for obtaining the vehicle driving force that satisfies the load requirement, Electric power for charging the secondary battery 50 can be output. In this case, when the “reference response time” has elapsed, the CPU of the control unit 60 drives the drive amounts of the respective units so that the output power from the fuel cell system 12 becomes equal to the “necessary power” corrected in step S590. Is set (step S550). Then, the CPU of the control unit 60 outputs a drive signal to each unit during the “reference response time” based on the drive amount set in step S550 (step S560), and ends this routine. At this time, the corrected “necessary power”, which is the sum of the drive motor required power corresponding to the load demand, the vehicle auxiliary machine required power, and the required charge amount, is output from the fuel cell system 12 and the secondary battery 50 The fuel cell system 12 is charged.

  If it is determined in step S600 that the maximum output in the fuel cell system 12 is less than the corrected “necessary power”, the fuel cell system 12 supplies the secondary battery 50 with electric power corresponding to the necessary charge amount. If it tries to do so, it will not be possible to output electric power for obtaining vehicle driving force that satisfies the load requirement. In this case, the CPU of the control unit 60 sets the value of the drive motor required power in the “required power” so that the “required power” obtained by adding the required charge amount is equal to or less than the maximum output in the fuel cell system 12. Then, the value is corrected to a smaller value (step S610). Specifically, for example, the required power of the drive motor may be set so that the “required power” obtained by adding the required charge amount is equal to the maximum output in the fuel cell system 12. Thereafter, the CPU of the control unit 60 sets the drive amount of each unit so that the output power from the fuel cell system 12 becomes equal to the “necessary power” corrected in step S610 when the “reference response time” has elapsed. (Step S550). Then, based on the drive amount set in step S550, during the “reference response time”, a drive signal is output to each unit (step S560), and this routine is terminated. At this time, the corrected “necessary power”, which is the sum of the drive motor required power corrected to a smaller value, the vehicle auxiliary machine required power, and the required charge amount, is output from the fuel cell system 12 and the secondary battery. 50 is in a state of being charged by the fuel cell system 12.

  According to the power supply device 10 of the fourth embodiment configured as described above, the allowable output of the secondary battery is equal to or greater than the sum of the “maximum value of auxiliary component acceleration power” and the control error power (α). Control to charge the secondary battery 50 is performed so as to maintain this state. Therefore, when performing control to secure “required power”, which is the sum of the required power of the drive motor and the required power of the vehicle auxiliary equipment, by the output from the fuel cell system 12, the secondary battery 50 supplies the auxiliary acceleration power. This makes it possible to suppress the shortage of auxiliary machine acceleration power when the load demand increases. That is, if the state where the allowable output of the secondary battery is equal to or greater than the sum of the “maximum value of auxiliary acceleration power” and the control error power (α) is maintained, the load demand increases. Even if it exists, auxiliary machine acceleration component electric power can be ensured in the output from the secondary battery 50. As a result, the required amount of oxidizing gas can be supplied to the fuel cell stack 15 without hindrance, and the output power of the fuel cell system 12 can be increased with sufficient responsiveness. Even if the allowable output of the secondary battery may be less than the sum of the “maximum value of the auxiliary acceleration power” and the control error power (α), the fuel cell system 12 causes the secondary battery 50 to As a result, the state where the allowable output of the secondary battery becomes equal to or greater than the sum of the “maximum value of auxiliary power for acceleration” and the control error power (α) can be quickly recovered. it can.

  In particular, in the present embodiment, when the load demand increases because the charge control of the secondary battery 50 is performed so that the “maximum value of auxiliary machine acceleration power” can be covered by the allowable output of the secondary battery. Even so, it becomes possible to ensure the auxiliary machine acceleration power at the allowable output of the secondary battery. Here, in the vehicle equipped with the power supply device 10, as long as the load requirement is increased within the range of the normal driving state, the auxiliary acceleration power is not necessarily increased to the “maximum value of the auxiliary acceleration electric power”. There is a case. Further, when the secondary battery 50 is charged by the fuel cell system 12 on the basis of the “maximum value of auxiliary component acceleration power” and the state where the remaining capacity of the secondary battery 50 is relatively large is always maintained. In addition, there is less room for charging the secondary battery 50 with regenerative power, and it may be difficult to sufficiently increase the energy efficiency of the vehicle. Therefore, as a value used to determine whether or not the secondary battery 50 should be charged by the fuel cell system 12, a smaller value may be used in place of the “maximum value of auxiliary component acceleration power” in the embodiment. good. As the smaller value, for example, the maximum value of auxiliary component acceleration power in the normal traveling mode of the vehicle may be used. Such a value may be obtained, for example, by virtually setting a normal traveling mode in advance and theoretically calculating the auxiliary machine acceleration power generated in the range. Alternatively, a vehicle equipped with a device having the same configuration as that of the power supply device 10 of the embodiment may be actually operated in the set normal traveling mode, and obtained as an experimental value.

  In step S580, the required amount of charge in the secondary battery 50 is obtained as a value obtained by subtracting the maximum value of the auxiliary acceleration power and the control error power (α) from the secondary battery allowable output. Other factors may be considered. For example, when the brake pedal is depressed and regenerative power is obtained, the regenerative power may be further subtracted to obtain the required charge amount.

  In the fourth embodiment, when it is determined in step S530 that the allowable output of the secondary battery is less than the sum of the maximum value of the auxiliary acceleration power and the control error power (α), in step S580. The fuel cell system 12 is controlled so as to output the “necessary power” obtained based on the derived required charge amount and the drive motor required power corresponding to the load request. However, in this case, the power actually used to charge the secondary battery 50 is the power obtained by subtracting the auxiliary acceleration power from the required charge amount. Therefore, when the secondary battery 50 is charged, the “necessary power” is corrected in consideration of the auxiliary acceleration power, and the power actually used for charging the secondary battery 50 can be secured. good. In this case, specifically, when the “necessary power” is corrected in step S590, in addition to the required charge amount, the auxiliary machine acceleration obtained in the same manner as in step S150 of the first embodiment is added. That's fine.

  Further, in the fourth embodiment, the secondary battery allowable power is a value obtained by adding the maximum value of the auxiliary acceleration power and the control error power (α) rather than outputting the driving force according to the load request. Although control giving priority to ensuring the above state is performed, different configurations may be adopted. That is, when it is determined in step S600 that the maximum output in the fuel cell system 12 is less than the corrected “required power”, only the value of the drive motor required power included in the “required power” is reduced to a small value. Instead of correcting, the required charge amount may be corrected to a small value. For example, when the driving state of the vehicle is learned and the secondary battery allowable power is in a driving state with a margin, the driving according to the load request is given priority, and the secondary battery allowable power is in a driving state with no margin. Therefore, it is possible to perform control giving priority to charging. Specifically, the derivative of the accelerator opening is integrated, or the frequency of the accelerator opening derivative is made stochastic, and the more the accelerator opening derivative is, the more the secondary battery allowable power is in a running state. Therefore, it is only necessary to perform control giving priority to securing the allowable power of the secondary battery. In addition, the smaller the derivative of the accelerator opening is, the more the secondary battery allowable power is judged to be in a traveling state, and control that gives priority to the output of the driving force according to the load request may be performed. .

F. Modified example of derivation method of auxiliary machine acceleration component power:
F1. Modification 1:
In the first to third embodiments, the auxiliary machine acceleration component power uses the current rotation speed of the motor of the air compressor 31, the target rotation speed of the motor of the air compressor 31, and the “reference response time” as parameters. Although a map for obtaining the auxiliary machine acceleration power is created in advance and is referred to by reference to this map, a different configuration may be used.

  In the first to third embodiments, the “reference response time” is set as “the time from when the instruction relating to the load request is input until the power corresponding to the load request is actually output”, but is shorter. Control may be performed by setting the time as the response time. That is, the response time may be set to an extremely short time, and the control may be repeated in a state where the current rotation speed of the air compressor motor and the target rotation speed of the air compressor motor are substantially the same value. In this case, the differential value of the rotation speed of the air compressor motor can be used to determine the auxiliary machine acceleration power. For example, a map for obtaining power for accelerating the auxiliary machine using the current rotational speed of the motor of the air compressor 31 and the differential value of the target rotational speed of the motor of the air compressor 31 as parameters is created in advance. May be derived by referring to. Alternatively, a map for obtaining power for accelerating the auxiliary machine using the current rotational speed of the motor of the air compressor 31 and the differential value of the current rotational speed of the motor of the air compressor 31 as parameters is created in advance. It may be derived by referring to the map.

F2. Modification 2:
As described above, the auxiliary machine acceleration component power may be obtained by referring to the rotation speed of the air compressor 31 in place of the operation of referring to the rotation speed of the air compressor motor. For example, a map for obtaining power for accelerating the auxiliary machine using the current rotation speed of the air compressor 31, the target rotation speed of the air compressor 31, and “reference response time” as parameters is created in advance. May be derived by referring to.

  The driving amount of the air compressor 31 is determined based on the amount of oxidizing gas to be supplied to the fuel cell stack 15. Therefore, the auxiliary machine acceleration component power may refer to the amount of oxidizing gas (hereinafter referred to as air amount) supplied from the air compressor 31 to the fuel cell stack 15 instead of the rotation speed of the motor of the air compressor 31. . For example, a map for obtaining power for accelerating the auxiliary machine using the current air quantity, target air quantity, and “reference response time” as parameters is created in advance, and the auxiliary machine acceleration is obtained by referring to this map. Divided power can be derived. Alternatively, in addition to the air amount, the pressure of the oxidizing gas supplied to the fuel cell stack 15 from the air compressor 31 (hereinafter referred to as air pressure) may be referred to. Specifically, for example, a map for determining auxiliary component acceleration power using the current air amount, current air pressure, target air amount, target air pressure, and “reference response time” as parameters. Is created in advance and the auxiliary machine acceleration power can be derived by referring to this map. By adding the air pressure to the parameter in addition to the air amount, the compression work in the air compressor 31 can be further taken into account, so that it is possible to derive the auxiliary acceleration power more accurately. Here, the current air amount or the current air pressure can be obtained as an actual measurement value by providing a flow sensor or a pressure sensor in the oxidizing gas supply pipe 33, for example. Alternatively, the current air amount and air pressure are derived based on the current rotational speed of the motor of the air compressor 31, the current rotational speed of the air compressor 31, and a drive command value for the motor of the air compressor 31. It is also good. Moreover, it is good also as using air pressure ratio which is a ratio of external pressure and the pressure in the exit part of the air compressor 31 instead of air pressure.

F3. Modification 3:
The amount of oxidizing gas (air amount) supplied to the fuel cell stack 15 is determined based on the amount of power that the fuel cell stack 15 should generate. Therefore, the auxiliary machine acceleration component power may refer to the output of the fuel cell stack 15 instead of the air amount. For example, the current output of the fuel cell stack 15, the target value (fuel cell output target value) of the power generation amount in the fuel cell stack 15 when the “reference response time” has elapsed, and the “reference response time” are parameters. A map for determining the auxiliary machine acceleration power to be generated is created in advance, and the auxiliary machine acceleration power can be derived by referring to this map. Alternatively, a map for obtaining power for accelerating the auxiliary machine using the fuel cell output target value and the differential value of the fuel cell output target value as parameters is created in advance, and the auxiliary machine acceleration is obtained by referring to this map. Power can be derived.

  In addition, as a parameter used when deriving auxiliary acceleration power as described above, instead of the fuel cell output target value, a required output to the fuel cell system 12 that is a basis for deriving the fuel cell output target value, That is, “required power” may be used. Alternatively, the required power of the drive motor, which is a basis for deriving this “required power”, may be used. Or you may use the accelerator opening which becomes a base which derives | leads-out this drive motor required electric power.

F4. Modification 4:
Further, the auxiliary machine acceleration power may be calculated logically each time instead of the configuration derived by referring to the map created based on the parameters described above. Auxiliary acceleration power W A — _motor (kW) is the current rotational speed N _motor (rpm) of the motor of the air compressor 31, the motor efficiency η _motor of the _motor of the air compressor 31, and the torque required for the response of the air compressor 31 Based on T A — _ACP (N · m), it can be calculated by equation (1).

In this equation (1), an equation for _{obtaining the} torque T A — _ACP (N · m) necessary for the response of the air compressor 31 is shown as equation (2) below. Torque T _{A_ACP} includes air compressor inertia J _{L_ACP} (kg · m ² ), motor inertia J _motor (kg · m ² ), air compressor mechanical efficiency η _{ACP_mech} , motor mechanical efficiency η _{motor_mech,} and motor of air compressor 31 The target rotation speed N _{motor_ref} (rpm), the current rotation speed N _motor (rpm) of the motor of the air compressor 31, and the response time t _A (sec).

In the equation (2), the air compressor inertia J _{L_ACP} is a value unique to the air compressor 31, and the motor inertia J _motor is a value unique to the _motor of the air compressor 31. 60. The air compressor mechanical efficiency η _{ACP_mech} is obtained in advance as a value unique to the air compressor 31, and the motor mechanical efficiency η _{motor_mech} is obtained in advance as a value unique to the motor of the air compressor 31, and is stored in the controller 60. Yes. Note that the air compressor mechanical efficiency η _{ACP_mech} and the motor mechanical efficiency η _{motor_mech} are not stored as unique values, but may have different configurations. In other words, a map for determining the mechanical efficiency of each air compressor or air compressor motor as a parameter is created and stored in advance, and a more accurate value is derived by referring to this map. It is also good to do.

Further, the torque _{TA_ACP} (N · m) required for the response of the air compressor 31 in the equation (1) is obtained based on any one of the equations (3) to (7) instead of the equation (2). It's also good. Here, in each embodiment described above, when performing driving control is to set the amount of drive of each section in a plurality of time points in the response time T _A. In the equation (3), the target rotational speed of the air compressor motor as a command value after the time Δt when the divided period within the response time is Δt is N _{motor_set} . In the equations (4) to (7), the current rotational speed N _{motor of the motor of} the air compressor 31, the target rotational speed N _{motor_ref} after the response time t _A of the motor of the air compressor 31, and the air compressor motor The target rotational speed after the period Δt is a differential value with respect to N _{motor_set} and the fuel cell output target value P _FC after the response time t _A. Note that C in the equation (7) is a correction constant.

G. Other variations:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

G1. Modification 1:
In the first to fourth embodiments, the acceleration component power for the air compressor 31 is obtained and controlled as the auxiliary component acceleration component power, but a different configuration may be used. In addition to the air compressor 31 or in place of the air compressor 31, the present invention may be applied to other fuel cell auxiliary devices in the control for providing power for acceleration. If the present invention is applied to the control based on the electric power required to drive the fuel cell auxiliary machine whose energy consumption increases or decreases as the power generation amount of the fuel cell increases or decreases, the same effect as in the embodiment can be obtained.

G2. Modification 2:
In the first to fourth embodiments, the battery that can supply power to the load is a secondary battery, but may have a different configuration. For example, a capacitor may be used as the capacitor instead of the secondary battery or in addition to the secondary battery.

  In the first to fourth embodiments, the hydrogen gas as the fuel gas supplied to the fuel cell stack 15 circulates in a part of the fuel gas supply pipe 25 and the fuel gas circulation pipe 26, but is different. It is good also as a structure. The fuel gas discharged from the fuel cell stack 15 is discharged outside the fuel cell system 12 without being circulated, or the reformed gas obtained by reforming fuel such as alcohol or hydrocarbon is used as the fuel gas. Various modifications, such as a configuration, are possible.

G3. Modification 3:
In the first to third embodiments, the auxiliary acceleration power required when the drive amount of the air compressor 31 is increased according to the load request is derived, and this auxiliary acceleration power is used as the secondary battery 50. However, it is also possible to perform control for deriving power for accelerating the auxiliary machine that is currently being consumed. The auxiliary machine acceleration power out of the electric power currently output from the power supply apparatus 10 is derived, and when the current auxiliary machine acceleration power exceeds a predetermined reference value, the auxiliary machine acceleration power is continued thereafter. Therefore, the control may be changed so that the power supplied from the fuel cell system 12 to the drive motor 53 is suppressed to be less than the power that meets the load demand. Specifically, changing the control so that the power supplied from the fuel cell system 12 to the drive motor 53 is controlled to be less than the power corresponding to the load request is, for example, response time as in the first embodiment. May be corrected to a time longer than the “reference response time”. Or what is necessary is just to correct | amend drive motor required electric power to a smaller value like 3rd Example. When the current auxiliary power for acceleration is equal to or less than the reference value, the auxiliary power for acceleration is sufficiently small, and the remaining capacity of the secondary battery 50 may be excessively reduced due to the auxiliary power for acceleration. Control may be performed so that an output corresponding to the load request is obtained when the “reference response time” has elapsed. At this time, the auxiliary acceleration power is output from the secondary battery 50 together with the control error power (α). When such control is performed, as in the case of the embodiment, power supply from the secondary battery 50 to the drive motor 53 may not be performed in principle, and as in the comparative example shown in FIG. It is good also as supplementing the electric power which the drive motor 53 requires with the battery 50. FIG. In any case, by performing control to suppress the remaining capacity decrease in the secondary battery 50 based on the current auxiliary component acceleration power, the power supply device 10 suppresses the decrease in the secondary battery allowable output. It is possible to suppress power shortage caused by the auxiliary acceleration power in the.

  For example, the current power for accelerating the auxiliary machine is created by storing in advance a map having the current air amount, the current air pressure, and the power currently supplied to the air compressor 51 as parameters. By referring to this map, it can be derived. Alternatively, based on a map that uses the current air amount and the current air pressure as parameters, power corresponding to the amount of work currently being performed by the air compressor 31 is obtained, and the obtained power and the air compressor 31 are actually consumed. The difference between the two may be used as the current auxiliary machine acceleration power. Alternatively, it is also possible to create a map using the differential value of the current output of the fuel cell stack 15 as a parameter in advance, and derive the current auxiliary component acceleration power by referring to this map.

G4. Modification 4:
In the first inner / fourth embodiment, the power supply device 10 is used as a power source for driving the vehicle, but may have a different configuration. For example, the present application may be applied to a power source for driving a moving body other than an automobile, or to a stationary power source device. The present invention can be applied to any power supply device that is used for various purposes such as home use, industrial use, and the like, and includes a fuel cell whose output varies according to load demand.

DESCRIPTION OF SYMBOLS 10 ... Power supply device 12 ... Fuel cell system 15 ... Fuel cell stack 20 ... Fuel gas supply / exhaust part 21 ... Hydrogen tank 22 ... Pressure regulation valve 23 ... Fuel gas circulation pump 24 ... Hydrogen filling piping 25 ... Fuel gas supply piping 26 ... Fuel Gas circulation piping 30 ... Oxidizing gas supply / discharge part 31 ... Air compressor 32 ... Humidifier 33 ... Oxidizing gas supply pipe 34 ... Oxidizing gas discharge pipe 40 ... Refrigerant supply / discharge part 41 ... Radiator 42 ... Refrigerant circulation pump 43 ... Refrigerant pipe 50 ... Secondary battery 51 ... DC / DC converter 52,54 ... Inverter 53 ... Drive motor 55 ... Fuel cell auxiliary motor 56 ... Wiring 57 ... Remaining capacity monitor 60 ... Control unit

Claims (17)

A power supply device for supplying power to a load,
A battery capable of supplying power to the load;
A fuel cell that can supply power to the load, and is an auxiliary device that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and the fuel cell A fuel cell system equipped with a fuel cell auxiliary machine in which the power required for driving increases as the amount of power generation increases,
A load request acquisition unit for acquiring a load request related to the magnitude of the load;
A control unit that controls the amount of power supplied to the load, the amount of drive of each part constituting the fuel cell, and the amount of output power from the fuel cell and the battery;
In order to increase the power generation amount of the fuel cell to a fuel cell output target value according to the load requirement within a predetermined response time, electric power corresponding to the work amount according to the load requirement in the fuel cell auxiliary machine An auxiliary component acceleration power deriving unit for deriving auxiliary component acceleration power that is the power required by the fuel cell auxiliary device beyond
With
When the control unit performs control to supply power corresponding to the load request from the power supply device to the load, the load request in the fuel cell auxiliary machine is used as a power supply amount to the fuel cell auxiliary machine. A power supply apparatus that controls the output power amount by securing the auxiliary acceleration power in addition to the power corresponding to the work amount corresponding to the power. The power supply device according to claim 1,
When the controller supplies power corresponding to the load request from the power supply device to the load, power corresponding to the auxiliary acceleration power is ensured in the output from the capacitor. A power supply apparatus for controlling the drive amount of each part constituting the fuel cell and the output power amount from the fuel cell and the battery. The power supply device according to claim 2, further comprising:
A capacitor allowable value deriving unit for deriving a capacitor output allowable value that is a limit value of an output that can be taken out from the capacitor;
The amount of power that should be output from the battery to cover the auxiliary acceleration power by the battery when the power corresponding to the load request is output from the power supply device to the load within the reference response time. A capacitor request output deriving unit for deriving a capacitor request output that is,
The capacitor output allowable value is compared with the capacitor required output, and if the capacitor output allowable value is greater than or equal to the capacitor required output, it is determined that the capacitor required output can be output from the capacitor, and the capacitor output allowable When the value is less than the capacitor required output, a capacitor output determining unit that determines that the capacitor required output cannot be output from the capacitor;
If the capacitor output determination unit determines that the capacitor required output cannot be output from the capacitor, the capacitor request output is applied to the load in response to the load request so that the capacitor required output is less than or equal to the capacitor output allowable value. And a suppression setting unit that corrects conditions for supplying power to
When the storage device output determination unit determines that the storage device required output cannot be output from the storage device, the control unit determines whether each of the units constituting the fuel cell is based on the conditions corrected by the suppression setting unit. A power supply device that controls a drive amount and an output power amount from the fuel cell and the battery. The power supply device according to claim 3,
As the correction of the condition, the suppression setting unit resets the reference response time to be longer, and reduces the auxiliary machine acceleration power derived by the auxiliary machine acceleration power deriving unit, whereby the capacitor request A power supply device that reduces the capacitor required output derived by an output deriving unit and sets the capacitor required output to be equal to or less than the capacitor output allowable value. The power supply device according to claim 3,
The suppression setting unit re-sets the fuel cell output target value lower than a value commensurate with the load demand as a correction of the condition, and the auxiliary machine acceleration power deriving unit derives the auxiliary machine acceleration. A power supply apparatus that reduces the required storage output derived by the required storage power output deriving unit by reducing the divided power, and sets the required storage output to be less than or equal to the allowable output of the storage battery. The power supply device according to any one of claims 3 to 5, further comprising:
When the storage device output determination unit determines that the storage device required output can be output from the storage device, the reference response time is within a range in which the storage device output allowable value can be maintained in the state where the storage device output is equal to or higher than the storage device request output. It has an acceleration amount increase setting part that corrects in a shorter time,
When the storage unit output determination unit determines that the storage unit required output can be output from the storage unit, the control unit determines the fuel cell based on the reference response time corrected by the acceleration amount increase setting unit. A power supply apparatus that controls the amount of drive of each part that constitutes and the amount of output power from the fuel cell and the battery. The power supply device according to any one of claims 3 to 5,
The control unit is a case where the capacitor output determination unit determines that the capacitor required output can be output from the capacitor, and the power corresponding to the load request cannot be output from the fuel cell system. Is a drive amount of each part constituting the fuel cell so that power is supplied from the capacitor to the load in a range where the total amount of output from the capacitor does not exceed the capacitor output allowable value, and A power supply device that controls the amount of electric power output from the fuel cell and the battery. A power supply device for supplying power to a load,
A fuel cell system comprising a fuel cell capable of supplying electric power to the load;
A battery capable of supplying power to the load;
With
The fuel cell system is an auxiliary machine that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and needs to be driven as the power generation amount of the fuel cell increases. A fuel cell auxiliary machine that increases power,
The battery can be charged by the fuel cell, and can output a shortage of power generated as a control error when performing control to supply power from the fuel cell to the load in response to a load request. There,
The power supply device further includes:
A capacitor allowable value deriving unit for deriving a capacitor output allowable value that is a limit value of an output that can be taken out from the capacitor;
When the power generation amount of the fuel cell is increased to a power generation amount corresponding to the load request within a predetermined response time, the power corresponding to the work amount corresponding to the load request in the fuel cell auxiliary machine is exceeded. Maximum deriving the maximum required output that is the sum of the maximum value of acceleration power that is the maximum value of auxiliary acceleration power that is required by the fuel cell auxiliary machine and the shortage of power that occurs as the error A request output deriving unit;
The fuel cell is configured so that the fuel cell charges the capacitor when the capacitor output allowable value is compared with the maximum required output and the capacitor output allowable value is less than the maximum required output. A control unit for controlling the drive amount of each unit to perform, and the output power amount from the fuel cell and the battery,
A power supply device comprising: A power supply device for supplying power to a load,
A fuel cell system comprising a fuel cell capable of supplying electric power to the load;
A battery capable of supplying power to the load;
A load request acquisition unit for acquiring a load request related to the magnitude of the load;
With
The fuel cell system is an auxiliary machine that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and needs to be driven as the power generation amount of the fuel cell increases. A fuel cell auxiliary machine that increases power,
The capacitor is capable of outputting a shortage of power that occurs as a control error when performing control to supply power according to the load request from the fuel cell to the load,
The power supply device further includes:
Auxiliary equipment that is consumed by the fuel cell auxiliary machine in excess of the power corresponding to the workload corresponding to the load demand in the fuel cell auxiliary machine among the electric power consumed by the fuel cell auxiliary machine Auxiliary acceleration power deriving unit for deriving acceleration power,
The drive amount of each part constituting the fuel cell and the output power amount from the fuel cell and the battery are controlled so that the power corresponding to the load request is supplied from the power supply device to the load. At the same time, when the auxiliary acceleration power derived by the auxiliary acceleration power deriving unit exceeds a preset reference value, the power supplied from the power supply device to the load is set as the load request. And a control unit that changes the control so as to suppress the electric power more than the appropriate power. The power supply device according to any one of claims 1 to 9,
The fuel cell auxiliary machine includes a drive motor. The power supply device according to any one of claims 1 to 7 and 9,
The fuel cell auxiliary machine is an air compressor that supplies air to the cathode of the fuel cell,
The auxiliary machine acceleration power deriving unit derives the auxiliary machine acceleration power based on at least the rotation speed of the air compressor or the motor of the air compressor. The power supply device according to any one of claims 1 to 7 and 9,
The fuel cell auxiliary machine is an air compressor that supplies air to the cathode of the fuel cell,
The auxiliary machine acceleration power deriving unit calculates the auxiliary machine acceleration power based on the rotation speed of the air compressor motor, the reference response time, and the inertia of the air compressor and the air compressor motor. Derived power supply. The power supply device according to any one of claims 1 to 12,
The capacitor is a secondary battery connected in parallel to the fuel cell, the load, and the fuel cell auxiliary machine,
The said control part is a power supply device which controls the output voltage of the said fuel cell and the said condenser, when controlling the output electric power of the said fuel cell and the said condenser. A moving object,
A motor for driving the movable body;
A power source apparatus according to any one of claims 1 to 13, wherein power is supplied to the motor as a load. A control method of a power supply device comprising a fuel cell system and a capacitor, wherein the fuel cell system includes the fuel cell and a power supply for supplying power to a load by the capacitor,
The fuel cell system is an auxiliary machine that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and needs to be driven as the power generation amount of the fuel cell increases. A fuel cell auxiliary machine that increases power,
A first step of obtaining a load request relating to the magnitude of the load;
In order to increase the power generation amount of the fuel cell to a fuel cell output target value according to the load requirement within a predetermined response time, electric power corresponding to the work amount according to the load requirement in the fuel cell auxiliary machine A second step of deriving auxiliary acceleration power, which is electric power required by the fuel cell auxiliary beyond
When performing control to supply power corresponding to the load request from the power supply device to the load, the power supply amount to the fuel cell auxiliary machine is added to the power corresponding to the work amount in the fuel cell auxiliary machine And a third step of securing the power for accelerating the auxiliary machine and controlling the amount of electric power output from the fuel cell and the battery. A control method of a power supply device comprising a fuel cell system and a capacitor, wherein the fuel cell system includes the fuel cell and a power supply for supplying power to a load by the capacitor,
The fuel cell system is an auxiliary machine that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and needs to be driven as the power generation amount of the fuel cell increases. A fuel cell auxiliary machine that increases power,
The battery can be charged by the fuel cell, and can output a shortage of power generated as a control error when performing control to supply power from the fuel cell to the load in response to a load request. There,
A first step of deriving a capacitor output allowable value that is a limit value of an output that can be taken out of the capacitor;
When the power generation amount of the fuel cell is increased to a power generation amount corresponding to the load request within a predetermined response time, the power corresponding to the work amount corresponding to the load request in the fuel cell auxiliary machine is exceeded. Deriving the maximum required output that is the sum of the maximum value of acceleration power that is the maximum value of auxiliary acceleration power that is the power required by the fuel cell auxiliary device and the shortage of power that occurs as the error. Two steps;
The fuel cell is configured so that the fuel cell charges the capacitor when the capacitor output allowable value is compared with the maximum required output and the capacitor output allowable value is less than the maximum required output. A third step of controlling the drive amount of each part to be performed, and the output power amount from the fuel cell and the battery,
A control method comprising: A control method of a power supply device comprising a fuel cell system and a capacitor, wherein the fuel cell system includes the fuel cell and a power supply for supplying power to a load by the capacitor,
The fuel cell system is an auxiliary machine that is driven for power generation of the fuel cell, can supply power from the fuel cell and the battery, and needs to be driven as the power generation amount of the fuel cell increases. A fuel cell auxiliary machine that increases power,
The capacitor is capable of outputting a shortage of power generated as a control error when performing control to supply power according to a load request from the fuel cell to the load,
A first step of obtaining the load request;
Auxiliary equipment that is consumed by the fuel cell auxiliary machine in excess of the power corresponding to the workload corresponding to the load demand in the fuel cell auxiliary machine among the electric power consumed by the fuel cell auxiliary machine A second step of deriving acceleration power,
The drive amount of each part constituting the fuel cell and the output power amount from the fuel cell and the battery are controlled so that the power corresponding to the load request is supplied from the power supply device to the load. At the same time, when the auxiliary acceleration power derived by the auxiliary acceleration power deriving unit exceeds a preset reference value, the power supplied from the power supply device to the load is set as the load request. And a third step of changing the control so that the electric power is less than the matched power.

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