JP6734189B2 - Fuel cell device and method of controlling fuel cell device - Google Patents

Description

One embodiment of the present invention relates to a fuel cell device and a control method of the fuel cell device.

In recent years, as next-generation energy, various fuel cell devices have been proposed in which a fuel cell that can obtain electric power using a fuel gas (hydrogen-containing gas) and air (oxygen-containing gas) is housed in a housing. ..

The fuel cell device has a fuel cell module in which a cell stack device and a reformer are housed in a container, and a flow path for supplying an oxygen-containing gas (air) to the cell stack device and exhaust gas to the outside. A flow path for discharging is stored in the storage container in advance (for example, see Patent Document 1). A fuel cell device is known in which an auxiliary device and a supply pipe for supplying fuel, air, water, etc. are connected to such a fuel cell device.

Further, there is known a fuel cell device in which a plurality of gas supply passages are arranged in parallel so as to feed a sufficient amount of fuel gas in order to increase the output of the fuel cell (for example, Patent Document 1). 2).

JP, 2005-158527, A JP, 2006-216283, A

In a fuel cell device having a plurality of fluid lines for supplying fluids such as fuel, air and water, it is necessary to dispose a flow meter on each line, and if the flow meters increase, cost will increase.

A fuel cell device according to an embodiment of the present disclosure includes a fuel cell, a first fluid line that supplies a fluid to the fuel cell, a flow meter that measures a supply amount of the fluid in the first fluid line, and a fluid. Which is a second fluid line for supplying the fluid to the fuel cell, and which does not have a flow meter for measuring the supply amount of the fluid in the second fluid line, and a measurement result of the flow meter At least one processor for controlling the supply of fluid in the second fluid line based on

A control method of a fuel cell device according to the present disclosure is a fuel cell, a first fluid line for supplying a fluid toward the fuel cell, and a flow rate for measuring a supply amount of the fluid in the first fluid line. And a second fluid line for supplying fluid toward the fuel cell, the second fluid line having no flow meter for measuring the supply amount of fluid in the second fluid line. And a processor, wherein the processor controls a supply amount of the fluid in the second fluid line based on a measurement result of the flow meter.

According to the fuel cell device and the control method of the fuel cell device of the present disclosure, it is possible to control the plurality of fluid lines based on the measurement value of one flow meter, so that the number of flow meters can be reduced and the cost can be reduced. Can be down.

It is a block diagram showing an example of a fuel cell device of this embodiment. It is a flow chart which shows an example of the control method of the fuel cell device of this embodiment. 5 is a flowchart showing another example of the control method of the fuel cell device of the present embodiment. It is a block diagram which shows another example of the fuel cell device of this embodiment.

A fuel cell device which is an example of the present embodiment will be described with reference to FIG. The fuel cell device 1 includes a fuel cell, and uses hydrogen to generate direct current power by a chemical reaction with oxygen in the air. In the following specific example, SOFC (Solid Oxide Fuel Cell) is mentioned as a fuel cell. Other examples of the fuel cell include PEFC (Polymer Electrolyte Fuel Cell) and MCFC (Molten Carbonate Fuel Cell). Fuel cells generate electricity by a chemical reaction between hydrogen and oxygen in the air. Regarding hydrogen used for power generation, it may be directly stored and supplied to the fuel cell, or may be stored as hydrocarbon gas and reformed to generate hydrogen and supplied to the fuel cell.

In the present embodiment, a specific example of the fluid supplied using the plurality of flow paths is air. A blower is a specific example of the adjusting unit. When the fluid to be supplied is water, a Hycera pump may be provided as the adjusting unit, and when the fluid to be supplied is fuel gas, for example, a diaphragm pump may be provided as the adjusting unit. An index that indicates the operating state of the adjusting unit and is an object of control is an operating parameter. In the case of a blower or hycera pump, the operating parameter may be the number of revolutions. In the case of a diaphragm pump, the operation parameter may be the number of operations per unit time. By arranging the water or gas supply path in the same manner as the air supply path shown in FIG. 1, it is possible to obtain the same effect regarding the supply of water or gas to the fuel cell device.

The fuel cell device 1 of the present embodiment includes a fuel cell module 10 including a reformer 16 and a cell stack 17, an air supply line 20 connected to the fuel cell module 10, and other auxiliary equipment. The cell stack 17 may have a structure in which a plurality of fuel cells that generate electricity are arranged in series so that a fuel gas can be supplied to each fuel cell. The configuration of the device included in the fuel cell module 10 may change depending on the configuration of the fuel cell device 1, and the fuel cell device is not limited to the cell stack and may have at least a fuel cell for power generation. ..

The fuel cell module 10 in FIG. 1 generates electric power by reacting fuel gas with air (oxygen-containing gas) in a cell stack 17 arranged in the housing 11. The fuel cell device according to the present embodiment has a fuel cell module 10 including a housing 11, a cell stack 17 and a reformer 16 located inside the housing 11, and the fuel cell module is according to the present embodiment. In the above, it is not an essential structure, and for example, the cell stack 17 may be included in a container that does not include the housing 11 and that stores an auxiliary device and the like. The raw fuel gas is introduced from the fuel gas supply passage 14. Water for steam reforming the raw fuel gas containing hydrocarbons in the reformer 16 is introduced from the water supply passage 15. Air, which is an oxygen-containing gas, is introduced into the fuel cell module 10 through the intake port 12. The raw fuel gas introduced from the fuel gas supply passage 14 reacts with water in the reformer to become hydrogen-containing fuel gas, and reacts with the air introduced from the intake port 12 to generate electricity. Exhaust gas is produced when air and fuel gas react. The exhaust gas is discharged into the atmosphere through the exhaust port 13.

An air supply line 20 is connected to the intake port 12 of the fuel cell module 10. The air supply line 20 includes a plurality of N fluid lines, i.e., air supply passages 21 _{1 to} 21 _N (collectively referred to as an air supply passage 21; the same applies hereinafter), and respective downstream sides of the air supply passages 21. It includes a common channel 22 that connects to the fuel cell module 10. The common flow path 22 joins the air from each of the air supply paths 21 _{1 to} 21 _N and supplies the air to the fuel cell module 10.

Filters 23 ₁ to 23 _N are provided at the intake ports of the air supply paths 21 _{1 to} 21 _N , respectively. The filters 23 ₁ to 23 _N can reduce the intrusion of dust or dust containing the outside air into the air supply passage 21. The air supply paths 21 _{1 to} 21 _N are respectively provided with blowers 24 _{1 to} 24 _N that are adjustment units that take in air from the outside. The blower of this embodiment also includes other air supply means such as a turbo fan.

Flow meter 25 is disposed between the blower 24 ₁ of the air supply passage 21 ₁ and the common flow channel 22. The flow meter is not provided in the other air supply paths 21 _{2 to} 21 _N. The flow meter 25 can measure the flow rate of the air flowing through the air supply passage 21 ₁ . That is, the air supply passage 21 includes an air supply passage 21 ₁ is a first fluid line flow meter is installed, an air supply path 21 flow meter is a second fluid line that is not installed ₂ through 21 _N Includes and. At least one first fluid line may be provided, and a plurality of first fluid lines may be provided.

The fuel cell device 1 includes at least one processor 30 to provide control and processing power to perform various functions, as described in further detail below. According to various embodiments, at least one processor 30 is implemented as a single integrated circuit (IC) or as a plurality of communicatively coupled integrated circuits ICs and/or discrete circuits. Good. At least one processor 30 may be implemented according to various known techniques.

In some embodiments, processor 30 includes one or more circuits or units configured to carry out one or more data calculation procedures or processes. For example, processor 30 may include one or more processors, controllers, microprocessors, microcontrollers, application specific integrated circuits (ASICs), digital signal processors, programmable logic devices, field programmable gate arrays, or any of these devices or configurations. Or other known device and configuration combinations to perform the functions described below.

The processor 30 controls the reformer 16 or the cell stack 17 inside the fuel cell module 10 and collects necessary information from them to monitor the fuel cell module 10. The processor 30 is to collect the value of the flowmeter 25 monitors the flow rate of air flowing through the air supply passage 21 _1. The processor 30 is configured to monitor and collect rpm is an operational parameter of the blower ₂₄ 1 to 24 _N, by controlling the rotational speed of the blower ₂₄ 1 to 24 _N, the air supply passage ₂₁ 1 through 21 _N The amount of each air supply can be controlled. That is, the processor 30 controls the air supply amount of each of the plurality of air supply passages 21 based on the measurement result of the flow meter 25.

The processor 30 may be arranged inside the housing 11 of the fuel cell module 10 or outside the housing 11. Further, it is also possible to provide a part or all of the air supply line 20 in the housing 11 of the fuel cell module 10.

In the fuel cell device, in order to supply air, an air supply path in which a blower is installed is connected to an air supply port of the fuel cell module, and the blower is operated to supply air to the fuel cell module. Since a fuel cell device with high output needs to supply air to many fuel cell stacks, a large blower with high air supply capacity is required. When the blower becomes large, the blower becomes expensive. In order to supply a large amount of fluid such as air, water or fuel gas to the fuel cell module in order to increase the output of the fuel cell device, the supply lines are parallelized in the supply line, and a small blower or When an adjusting unit such as a pump is provided, a flow meter has to be placed in each flow path in order to control the flow velocity of the fluid flowing through the plurality of flow paths, which tends to increase the cost. In addition, when the number of flow meters increases, the size of the fuel cell device may increase, and the installation area may increase.

By controlling the blower based on the measurement result of the flow meter installed in one of the plurality of air supply paths, the flow rate is higher than that of the fuel cell device in which the flow meter is installed in each air supply path. The number of meters can be reduced, and the cost of the fuel cell device can be reduced. In some cases, it is possible to suppress the volume in which the flow meter is installed, and in that case, it is possible to prevent the fuel cell device from increasing in size.

For example, although it is conceivable to dispose the flowmeter in the common flow path, the common flow path is a place where the air from a large number of air supply paths joins each other, and it is difficult to stabilize the airflow. Further, since the common flow path is close to the fuel cell module and is affected by the pressure change of the fuel cell module, it is difficult to measure the stable flow rate. Therefore, stable control of the fuel cell module becomes difficult. Therefore, by disposing a flow meter in one of the air supply passages 21 farther from the fuel cell module 10 than the common flow passage 22, the flow rate can be measured at a place where the flow is stable, and a stable fuel cell can be obtained. Control of the module 10 can be realized.

Although FIG. 1 shows an example in which the air flowing through _one air supply path 211 is measured by the flowmeter 25 and all blowers are controlled based on the measurement result, for example, a plurality of flowmeters ( Alternatively, all blowers may be controlled based on the measurement results. In this case, since the flow rate control is performed based on a plurality of flow meters, improvement in accuracy can be expected. Even if a failure occurs in one flow meter, the other flow meter can be supplemented, so that a highly reliable fuel cell device can be realized. That is, the supply amount of the fluid in the second fluid line may be controlled using the plurality of first fluid lines.

Further, the air supply path 21 may be divided into a plurality of groups, one flow meter may be arranged for each group, and the flow rate may be controlled based on the measurement result of the flow meter installed for each group of the air supply path. .. That is, the first fluid line may be arranged for each group of fluid lines, and the supply amount of the fluid in the second fluid line of each group may be controlled.

FIG. 2 is a flowchart showing an example of the control method of the fuel cell device of this embodiment. In the control example shown in the flowchart of FIG. 2, the air supply passages 21 _{1 to} 21 _N , which are fluid lines, may have the same flow passage characteristics, but may not have the same flow passage characteristics. The flow passage characteristic is a characteristic that is determined by, for example, the shape, material, and installation position of the fluid supply passage for water, fuel, gas, etc., and indicates the relationship between the operating parameter of the adjustment unit and the flow rate. For example, if the air supply paths have different flow path characteristics, different flow rates will flow to the air supply paths even if they are operated with the same operating parameter (rotation speed) using the same blower. Therefore, the flow velocity characteristics of the respective air supply passages can be controlled to be the same by the processor controlling the rotation speed of the blower using the flow passage characteristics. The "substantially the same flow path characteristic" means that the operating parameter or the flow rate is within ±10%.

The processor 30 acquires operation information of the fuel cell module 10 (step S01). The operation information includes the power generation amount of the fuel cell module 10, the temperature and pressure of the cell stack, instructions from the outside, and the like. When the pressure is used as the operation information, the pressure sensor may be located near the cell stack, for example. Subsequently, the processor 30 calculates an air input required amount, which is the amount of air to be input to the fuel cell module 10, based on the operation information acquired by the fuel cell module 10 (step S02).

Subsequently, the processor 30 calculates the air flow rate to be supplied from each of the air supply paths 21 _{1 to} 21 _N based on the calculated required amount of air input, and based on the calculated value, the blower 24 _{1 to} 24 _N that is the adjustment unit. The respective rotation speeds are calculated, and control is performed so that the rotation speeds of the blowers 24 _{1 to} 24 _N become the calculated values (step S03).

Then the processor 30 obtains a first rotation speed of the blower 24 ₁ is a regulatory unit and the flow meter 25 measured flow rate of, check whether it is the flow rate corresponding to the air input amount calculated in step S2 Then, feedback control is performed to correct the rotation speed of the blower 24 ₁ so that the value of the flow meter 25 becomes the control target value (step S04).

Subsequently, the processor 30 calculates the appropriate rotation speed of each of the blowers 24 _{2 to} 24 _N , which is the second adjustment unit, based on the corrected rotation speed of the blower 24 ₁ . For example, when the flow passage characteristics are different between the air supply passages, a calculation formula or a calculation table capable of obtaining the rotation speeds of 24 _{2 to} 24 _N from the rotation speed of the blower 24 ₁ is prepared in the processor 30. The proper rotation speed of the blowers 24 _{2 to} 24 _N is calculated based on the calculation formula or calculation table (step S05).

Then the processor 30 measures the rotational speed of the blower ₂₄ 2 to 24 _N (Step S06), compared to the proper rotational speed calculated in step S5 (step S07). If the rotation speed is appropriate, the rotation speed of the blower is maintained (step S08). If the rotation speed of the blower is not appropriate (step S09) and the rotation speed of the blower is higher than the proper rotation speed, the control signal voltage corresponding to the blower is lowered to lower the rotation speed of the blower (step S09). S10). If the rotation speed of the blower is lower than the proper rotation speed, the control signal voltage corresponding to the blower is increased to increase the rotation speed of the blower (step S11). Such control of the blower rotation speed is performed on the blowers 24 _{2 to} 24 _N to bring all the blowers close to the proper rotation speed. Thus, the processor 30 controls the operating parameter of the second tension unit based on the control result of the first adjustment unit.

In the present embodiment, the control signal voltage is increased to increase the rotation speed of the blower, and the control signal voltage is decreased to decrease the rotation speed of the blower.However, the form of the control signal is appropriately selected from other forms. be able to. For example, a mode in which the current value is changed as the control signal to control the rotation speed is also possible.

Thus the processor 30 for performing control as shown in the flowchart of FIG. 2, the rotation speed flowmeter 25 is the operation parameters of the blower 24 ₁ disposed air supply passage 21 _1, the flow meter 25 flow rate Is obtained, and based on the obtained rotation speed and flow rate, the proper rotation speeds of the blowers 24 _{2 to} 24 _N of the plurality of air supply paths 21 _{2 to} 21 _N are calculated, and the rotation speed of the blowers 24 _{2 to} 24 _N is calculated. Control to an appropriate speed. This makes it possible to realize stable control of the fuel cell device with one flow meter.

FIG. 3 is a flowchart showing another example of the control method of the fuel cell device of this embodiment. In the control example shown in the flowchart of FIG. 3, the air supply paths 21 _{2 to} 21 _{N which} are the second fluid lines have substantially the same flow path characteristics as the air supply paths 21 ₁ which are the first fluid lines. ing. Here, the air supply path having substantially the same flow path characteristics means a flow path in which substantially the same flow rate is obtained when the blowers arranged in the air supply path are operated at the same rotation speed. In the case of such an air supply path configuration, the rotation speed of the blower in the air supply path with the flow meter is controlled, and the rotation speed of the blower in the other air supply path is controlled by the rotation of the blower in the air supply path with the flow meter. It may be controlled to match the number.

The processor 30 acquires the operation information of the fuel cell module 10 (step S21). The operation information includes the power generation amount of the fuel cell module 10, the temperature and pressure of the cell stack device, an instruction from the outside, and the like. When the pressure is used as the operation information, the pressure sensor may be located near the cell stack, for example. The processor 30 calculates an air input required amount, which is the amount of air to be input to the fuel cell module 10, based on the operation information acquired by the fuel cell module 10 (step S22).

Subsequently, the processor 30 calculates the air flow rate of the air supply path 21 ₁ based on the calculated required amount of air input, and calculates the rotation speed of the blower 24 ₁ which is the first adjustment unit based on the calculated value. , The blowers 24 _{1 to} 24 _N are controlled so that the rotation speed, which is an operation parameter, becomes the calculated value (step S23). Since the air supply passages 21 _{1 to} 21 _N have the same flow path characteristics, the blowers 24 _{1 to} 24 _N have exactly the same rotation speed. Therefore, the rotation speeds of the blowers 24 _{2 to} 24 _N , which are the second adjustment units, are controlled to be the same as the rotation speed of the blower 24 ₁ .

Then the processor 30 obtains a measured flow rate of the rotational speed and the flow meter 25 blower 24 _1, or to confirm whether turned flow rate corresponding to the air input amount calculated in step S22, the feedback control, the flow rate as total of 25 values of a value of the control target is controlled so as to correct the rotational speed of the blower 24 ₁ (step S24).

Then, the processor 30 controls the rotation speeds of the blowers 24 _{2 to} 24 _N to be the same, based on the corrected rotation speed of the blower 24 ₁ . The processor 30 measures the rotation speeds of the blowers 24 _{2 to} 24 _N (step S25) and compares the rotation speeds with those of the blower 24 ₁ (step S26). If the rotation speed is appropriate, the rotation speed of the blower is maintained (step S27). If the rotation speed of the blower is not appropriate (step S28) and the rotation speed of the blower is larger than the rotation speed of the blower 24 ₁ , the control signal voltage corresponding to the blower is lowered to reduce the rotation speed of the blower. Lower (step S29). When the rotation speed of the blower is lower than the proper rotation speed, the control signal voltage corresponding to the blower is increased to increase the rotation speed of the blower (step S30). Such control of the blower rotation speed is performed for the blowers 24 _{2 to} 24 _N so that the rotation speeds of all the blowers are controlled to be the same as the rotation speed of the blower 24 ₁ .

As described above, the plurality of air supply paths 21 _{1 to} 21 _N have substantially the same flow path characteristics, and the processor 30 determines the air in which the flow meter 25 is arranged based on the measurement result of the flow meter 25. The rotation speed of the blower 24 ₁ of the supply path 21 ₁ is controlled, and the rotation speed of the blowers 24 _{2 to} 24 _N of the air supply paths 21 _{2 to} 21 _N of the plurality of air supply paths in which the flowmeter is not arranged is controlled. , And is controlled so as to be equal to the rotation speed of the blower 24 ₁ of the air supply path 21 ₁ in which the flow meter 25 is arranged.

By providing the air supply passage having substantially the same flow path characteristics, the flow rate of the air supply passage can be measured and controlled, and the result can be applied to another air supply passage to be controlled, which simplifies the control means. Therefore, the cost can be reduced.

FIG. 4 is a block diagram showing another example of the fuel cell device of the present embodiment. In FIG. 1, a plurality of air supply passages that are fluid lines are also provided, whereas this example is different in that a plurality of fuel supply passages that are fluid lines are provided.

The other configuration of the fuel cell module 10 included in the fuel cell device 1 is the same as that of the embodiment shown in FIG. A fuel supply line 40 is connected to the fuel cell module to supply fuel gas to the fuel cell module 10. The fuel supply line 40 includes fuel supply paths 41 _{1 to} 41 _N, which are a plurality of N fluid supply paths, and a common flow path 42 that connects each downstream side of the fuel supply path 41 and the fuel cell module 10. Contains. The common flow path 42 joins the raw fuel gas from each of the fuel supply paths 41 _{1 to} 41 _N and supplies the fuel gas to the fuel cell module 10. The fuel cell module 10 includes a reformer 16 and a cell stack device 17. The reformer 16 is located between the fuel supply line 40 and the cell stack device 17. The raw fuel gas supplied from the fuel supply line 40 flows into the reformer, reacts with water from the water supply passage 15 and undergoes steam reforming, and becomes a fuel gas containing hydrogen to become a cell stack device 17 Is supplied to. That is, the reformer 16 includes a 41 ₂ to 41 _N as a fuel supply passage 41 ₁ and the second fluid line is a first fluid line, is located between the fuel cells.

The upstream sides of the fuel supply paths 41 _{1 to} 41 _N are connected to a gas supply source. The fuel supply paths 41 _{1 to} 41 _N are respectively provided with pumps 43 ₁ to 43 _N which are adjustment units for introducing fuel.

A flow meter 44 is disposed between the common flow path 42 and the pump 43 ₁ which is the first adjustment unit of the fuel supply path 41 ₁ which is the first fluid line. The flow meter is not provided in the fuel supply paths 41 _{2 to} 41 _N that are the second fluid line. Flowmeter 44 can measure the flow rate of the fuel gas flowing through the fuel supply passage 41 _1.

The processor 30 controls the fuel cell module 10 and collects necessary information from the fuel cell module 10 to monitor the fuel cell module 10. The processor 30 is to collect the value of the flowmeter 44 monitors the flow rate of the fuel flowing through the fuel supply passage 41 _1. Further, the processor 30, the pump ₄₃ 1-43 with _N monitored by collecting the rotational speed is operating parameter of the pump ₄₃ 1-43 by controlling the rotational speed of _N, the fuel supply passage ₄₁ 1 to 41 _N Each fuel supply amount can be controlled. That is, the processor 30 controls the fuel gas supply amount of each of the plurality of fuel supply paths 41 based on the measurement result of the flow meter 44. Also in the fuel cell device shown in FIG. 4, the flow rate of the fuel gas can be controlled by the control similar to that shown in the flowcharts of FIGS.

In this way, by controlling all the pumps based on the measurement result of the flow meter arranged in one of the plurality of fuel supply paths, the fuel cell in which the flow meter is arranged in each fuel supply path is controlled. Since the number of flow meters can be reduced as compared with the device, the cost of the fuel cell device can be reduced. Further, since the volume in which the flow meter is installed can be suppressed, it is possible to prevent the fuel cell device from increasing in size.

Although the present invention has been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and improvements can be made without departing from the scope of the present invention.

1 Fuel Cell Device 10 Fuel Cell Module 20 Air Supply Line 21 Air Supply Path 21 _{1 to} 21 _N Air Supply Path 22 Common Flow Path 24 _{1 to} 24 _N Blower 25 Flowmeter 30 Processor 40 Fuel Supply Line 41 Fuel Supply Path 41 ₁ to 41 _N fuel supply channel 42 common channel 43 ₁ to 43 _N pump 44 flow meter

Claims (12)

Fuel cells,
A first fluid line for supplying a fluid to the fuel cell unit;
A flow meter for measuring the supply amount of fluid in the first fluid line,
A second fluid line for supplying a fluid toward the fuel cell, the second fluid line having no flow meter for measuring the supply amount of the fluid in the second fluid line;
Based on a measurement result of the flow meter to control the supply amount of the fluid in the second fluid line, seen including at least one processor,
A fuel cell device in which the supply destination of the fluid in the first line and the supply destination of the fluid in the second line are the same . The fuel cell device according to claim 1, further comprising a common flow path connecting a downstream side of the first line and a downstream side of the second line. Further comprising an adjustment unit for adjusting the fluid supply of the second fluid line based on the at least one processor,
The fuel cell device according to claim 1 or 2 , wherein the at least one processor controls a supply amount of a fluid by controlling an operation parameter of the adjustment unit. When the adjusting unit is the second adjusting unit,
Further comprising a first adjusting unit for adjusting a fluid supply of the first fluid line based on the at least one processor, wherein the at least one processor controls an operating parameter of the first adjusting unit. The fuel cell device according to claim 3 , wherein the supply amount of the fluid is controlled by. The first fluid line and the second fluid line each have substantially the same flow path characteristics,
The fuel cell device according to claim 4 , wherein the at least one processor controls an operating parameter of the second adjusting unit to be equal to an operating parameter of the first adjusting unit. The fuel cell device according to claim 5 , wherein the flow path characteristic includes a relationship between an operation parameter and a flow rate. The at least one processor calculates a supply amount of fluid in each of the first fluid line and the second fluid line based on a measurement result of the flow meter,
Based on the calculated supply amount of the first fluid line and the second fluid line of each fluid, to control the supply amount of fluid in the first fluid line and the second fluid line, according to claim 4 The fuel cell device described. Wherein the fluid comprises a gas containing oxygen, the fuel cell apparatus according to any one of claims 1 to 7. Wherein the fluid comprises a liquid containing water, fuel cell apparatus according to any one of claims 1 to 7. Wherein the fluid comprises a gas containing a hydrocarbon, fuel cell apparatus according to any one of claims 1 to 7. Further comprising a reformer for performing steam reforming,
The fuel cell device according to claim 10 , wherein the reformer is located between the fuel cell and the first fluid line and the second fluid line. Fuel cells,
A first fluid line for supplying a fluid to the fuel cell unit;
A flow meter for measuring the supply amount of fluid in the first fluid line,
A second fluid line for supplying a fluid toward the fuel cell, the second fluid line having no flow meter for measuring the supply amount of the fluid in the second fluid line;
A method of controlling a fuel cell device including a processor, comprising:
The supply destination of the fluid in the first line is the same as the supply destination of the fluid in the second line,
The method of controlling a fuel cell device, wherein the processor controls a supply amount of fluid in the second fluid line based on a measurement result of the flow meter.

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