fuel cell system

Abstract

This invention provides a fuel cell system capable of load balancing of multiple auxiliary machines. The fuel cell system includes: one or more flow paths; multiple auxiliary machines; and a control device that controls the operation of the multiple auxiliary machines and is capable of selectively executing a first operating mode and a second operating mode. The multiple auxiliary machines include a first auxiliary machine and a second auxiliary machine. In the first operating mode, the operating range or probability of operation set for the first auxiliary machine is greater than the operating range or probability of operation set for the first auxiliary machine in the second operating mode. In the first operating mode, the operating range or probability of operation set for the second auxiliary machine is less than the operating range or probability of operation set for the second auxiliary machine in the second operating mode. The control device is configured to execute the first operating mode when the first cumulative operating amount of the first auxiliary machine is less than or equal to the first predetermined amount, and to execute the second operating mode when the first cumulative operating amount exceeds the first predetermined amount.

Description

Technical Field

[0001] The technology disclosed in this specification relates to fuel cell systems. Background Technology

[0002] Patent document 1 discloses a fuel cell system comprising: one or more flow paths for fluid to flow through the fuel cell system; multiple auxiliary machines disposed in the one or more flow paths; and a control device for controlling the operation of the multiple auxiliary machines.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2022-167386

[0004] In the fuel cell system of Patent Document 1, there is no consideration given to load balancing of multiple auxiliary machines. Summary of the Invention

[0005] This specification provides a technique for balancing the load of multiple auxiliary machines.

[0006] In a first embodiment of this technology, the fuel cell system may include: one or more flow paths for the flow of fluid utilized by the fuel cell system; multiple auxiliary machines disposed in the one or more flow paths; and a control device that controls the operation of the multiple auxiliary machines and is capable of selectively executing a first operating mode and a second operating mode. The multiple auxiliary machines may include a first auxiliary machine and a second auxiliary machine. The operating range or opportunity set for the first auxiliary machine in the first operating mode may be greater than the operating range or opportunity set for the first auxiliary machine in the second operating mode. The operating range or opportunity set for the second auxiliary machine in the first operating mode may be smaller than the operating range or opportunity set for the second auxiliary machine in the second operating mode. The control device may also be configured to execute the first operating mode when the first cumulative operating amount of the first auxiliary machine is less than or equal to a first predetermined amount, and to execute the second operating mode when the first cumulative operating amount exceeds the first predetermined amount.

[0007] According to the above structure, when the first cumulative action amount exceeds the first predetermined amount, the control device executes a second operating mode. By increasing the operating range or opportunity set for the second auxiliary machine in the second operating mode, the operating range or opportunity set for the first auxiliary machine in the second operating mode can be reduced. Therefore, by executing the second operating mode, the load on the first auxiliary machine can be reduced, and the load on the second auxiliary machine can be increased. Thus, the load of multiple auxiliary machines can be balanced.

[0008] Here, "equalization" refers to reducing the difference between the load of the first auxiliary machine and the load of the second auxiliary machine compared to a structure in which the control device operates only in the first operating mode.

[0009] In the second embodiment, based on the first embodiment described above, the fuel cell system may further include an air compressor and a fuel cell stack. The one or more flow paths may include: a supply flow path for supplying air from the air compressor to the fuel cell stack; a discharge flow path for recovering the reacted air discharged from the fuel cell stack; and a bypass flow path connecting a first position of the supply flow path and a second position of the discharge flow path. The first auxiliary device may be a first control valve located upstream of the second position in the discharge flow path, and the second auxiliary device may be a second control valve located in the bypass flow path.

[0010] Based on the above structure, the load on the first control valve and the load on the second control valve can be balanced.

[0011] In the third approach, based on the second approach described above, the control device may be configured to execute the second operation mode when the first cumulative action amount exceeds the first predetermined amount and the second cumulative action amount of the second auxiliary machine is below the second predetermined amount, and to execute the first operation mode when the first cumulative action amount exceeds the first predetermined amount and the second cumulative action amount exceeds the second predetermined amount.

[0012] Based on the above structure, the control device can revert to the first operating mode at an appropriate time.

[0013] In the fourth approach, based on the second or third approach described above, the plurality of auxiliary machines may include a third control valve disposed in the supply flow path at a position downstream of the first position. The operating range set for the third control valve in the first operating mode is smaller than the operating range set for the third control valve in the second operating mode.

[0014] Based on the above structure, the loads of the first control valve, the second control valve, and the third control valve can be balanced. Attached Figure Description

[0015] Figure 1 This is a diagram schematically illustrating the configuration of the fuel cell system 2 in an embodiment.

[0016] Figure 2 It is a diagram representing the information within memory 100.

[0017] Figure 3 This is a flowchart of the process determined by the action mode executed by the control device 10. Detailed Implementation

[0018] (Example)

[0019] like Figure 1As shown, the fuel cell system 2 includes a fuel cell stack 4, an air supply system 6 for supplying air as an oxidant gas, a hydrogen circulation system 8 for supplying hydrogen as a fuel gas, and a control device 10. Although not shown in the figure, the fuel cell system 2 also includes a water-cooled cooling system for cooling the fuel cell stack 4. Alternatively, the fuel cell system 2 may include an air-cooled cooling system instead of a water-cooled cooling system. The fuel cell stack 4 generates electricity by reacting oxygen contained in the air supplied from the air supply system 6 with hydrogen supplied from the hydrogen circulation system 8. The application of the fuel cell system 2 is not particularly limited. For example, the fuel cell system 2 can be a mobile fuel cell system mounted on a vehicle, ship, or other mobile body, or a stationary fuel cell system used in stationary power generation equipment.

[0020] The air supply system 6 includes an air compressor 20 and an air flow path 22. The air compressor 20 supplies oxygen-containing air to the fuel cell stack 4. The air flow path 22 includes an air supply flow path 24, an air exhaust flow path 26, and a bypass flow path 28.

[0021] Air supply path 24 supplies air from air compressor 20 to fuel cell stack 4. The upstream end of air supply path 24 is connected to air compressor 20, and the downstream end is connected to fuel cell stack 4. A check valve 30, a first pressure sensor 32, and an inlet valve 34 are provided in air supply path 24. Check valve 30 is located upstream of the first pressure sensor 32. The first pressure sensor 32 is located between check valve 30 and inlet valve 34. Inlet valve 34 opens and closes the flow path within air supply path 24.

[0022] Air exhaust path 26 recovers the reacted air discharged from fuel cell stack 4. The upstream end of air exhaust path 26 is connected to fuel cell stack 4, and the downstream end is connected to the discharge point for the reacted air and water. A pressure regulating valve 36 is provided in air exhaust path 26.

[0023] The bypass flow path 28 connects the air supply flow path 24 to the air discharge flow path 26. The bypass flow path 28 connects a first position 24A of the air supply flow path 24 to a second position 26A of the air discharge flow path 26. The first position 24A is the position between the first pressure sensor 32 and the inlet valve 34. The second position 26A is a position downstream of the pressure regulating valve 36. A diverter valve 38 is provided in the bypass flow path 28.

[0024] The hydrogen cycle system 8 includes a fuel tank 50, a hydrogen flow path 52, an injector 54, a linear solenoid valve (LSV) 56, an ejector 58, and a gas-liquid separator 60. The fuel tank 50 stores hydrogen gas as fuel.

[0025] The hydrogen flow path 52 includes a hydrogen supply flow path 70, a hydrogen discharge flow path 72, a circulation flow path 74, and an exhaust / drain flow path 76. The hydrogen supply flow path 70 connects the fuel tank 50 to the fuel cell stack 4. The hydrogen discharge flow path 72 connects the fuel cell stack 4 to the gas-liquid separator 60. The hydrogen discharge flow path 72 is used to discharge water generated in the fuel cell stack 4 and exhaust gas discharged from the fuel cell stack 4. Hereinafter, the exhaust gas will be referred to as "fuel exhaust gas". The circulation flow path 74 connects the gas-liquid separator 60 to the ejector 58. The circulation flow path 74 supplies fuel exhaust gas to the ejector 58. The exhaust / drain flow path 76 connects the gas-liquid separator 60 to the air discharge flow path 26.

[0026] The hydrogen supply path 70 includes a first supply path 80, a second supply path 82 branching from the first supply path 80, and a third supply path 84. The first and second supply paths 80 and 82 connect the fuel tank 50 to the ejector 58. An injector 54 and a second pressure sensor 90 are provided in the first supply path 80. The injector 54 is located between the branch of the second supply path 82 and the ejector 58. The second pressure sensor 90 is located between the branch of the second supply path 82 and the fuel tank 50. The second pressure sensor 90 detects the pressure in the flow path upstream of the injector 54 and the LSV 56. The downstream end of the second supply path 82 is connected to the ejector 58. The LSV 56 is provided in the second supply path 82. The third supply path 84 connects the ejector 58 to the fuel cell stack 4. A third pressure sensor 92 is provided in the third supply path 84. The third pressure sensor 92 detects the pressure in the flow path downstream of the ejector 58. Injector 54 and LSV 56 adjust the supply flow rate of hydrogen to fuel cell stack 4. The construction of injector 54 and LSV 56 is not particularly limited, and known injector and LSV constructions can be used. Ejector 58 draws fuel exhaust gas from recirculation path 74.

[0027] The gas-liquid separator 60 is connected to the downstream end of the hydrogen discharge flow path 72, the upstream end of the circulation flow path 74, and the upstream end of the exhaust drainage flow path 76. An exhaust drainage valve 94 is provided in the exhaust drainage flow path 76.

[0028] The control device 10 is configured as a computer equipped with a processor, RAM, ROM, and other memory 100. For example... Figure 2 As shown, the memory 100 stores program 102, cumulative action amount of pressure regulating valve 110, cumulative action amount of diverter valve 112, threshold of pressure regulating valve 120, threshold of diverter valve 122, first action table 130 and second action table 132.

[0029] The control device 10 controls the operation of each component of the fuel cell system 2 according to program 102. The control device 10 is connected to the first pressure sensor 32, the second pressure sensor 90, and the third pressure sensor 92. The control device 10 uses information obtained from the sensors 32, 90, 92, etc., to determine the target air flow rate, target air pressure, and target hydrogen flow rate to be supplied to the fuel cell stack 4. The control device 10 controls the operation of the injector 54 and the ejector 58 in such a way that the pressure of the air supplied to the fuel cell stack 4 is the target air pressure and the amount of air supplied to the fuel cell stack 4 is the target air amount. The control device 10 is configured to selectively execute a first operating mode and a second operating mode, which are modes for controlling the operation of the inlet valve 34, the pressure regulating valve 36, and the flow divider valve 38. Furthermore, the control device 10 controls the operation of the air compressor 20, the inlet valve 34, the pressure regulating valve 36, and the flow divider valve 38 in such a way that the hydrogen flow rate supplied to the fuel cell stack 4 is the target hydrogen flow rate.

[0030] The cumulative action amount 110 of the pressure regulating valve, the cumulative action amount 112 of the flow divider valve, the threshold value 120 of the pressure regulating valve, and the threshold value 122 of the flow divider valve are determined and processed according to the action mode described later (see reference). Figure 3 The information used in the following sections is as follows: The cumulative actuation amount 110 of the pressure regulating valve represents the cumulative actuation amount of the pressure regulating valve 36. Specifically, the cumulative actuation amount 110 represents the cumulative value of the opening degree that the pressure regulating valve 36 has actuated. The cumulative actuation amount 112 of the diverter valve represents the cumulative actuation amount of the diverter valve 38. Specifically, the cumulative actuation amount 112 of the diverter valve represents the cumulative value of the opening degree that the diverter valve 38 has actuated. The pressure regulating valve threshold 120 and the diverter valve threshold 122 are thresholds used for switching operating modes. As an example, the pressure regulating valve threshold 120 is the value obtained by multiplying the upper limit actuation amount of the pressure regulating valve 36 by "0.7". The upper limit actuation amount of the pressure regulating valve 36 is determined through durability testing, etc. As an example, the diverter valve threshold 122 is the value obtained by multiplying the upper limit actuation amount of the diverter valve 38 by "0.7". The upper limit actuation amount of the diverter valve 38 is determined through durability testing, etc.

[0031] The first operation table 130 and the second operation table 132 correspond to the first operation mode and the second operation mode, respectively. The first operation table 130 and the second operation table 132 are tables representing the operation content of the inlet valve 34, the pressure regulating valve 36, and the flow divider valve 38. The operation content is the operating range of the inlet valve 34, the pressure regulating valve 36, and the flow divider valve 38. The opening degree of each valve in the low-load region, the medium-load region, and the high-load region is set in the first operation table 130 and the second operation table 132. The low-load region is the region where relatively low power generation is required. The high-load region is the region where relatively high power generation is required. The medium-load region is the region between the low-load region and the high-load region.

[0032] First, the contents of the first action table 130 will be explained. The opening degrees of the inlet valve 34 in the low-load, medium-load, and high-load regions are set to "10°", "75°", and "75°", respectively. The opening degrees of the pressure regulating valve 36 in the low-load, medium-load, and high-load regions are set to "10°", "75°", and "25°", respectively. The opening degrees of the diverter valve 38 in the low-load, medium-load, and high-load regions are set to "10°", "10°", and "10°", respectively. Thus, in the first action table 130, the operating range of the pressure regulating valve 36 is greater than that of the diverter valve 38. On the other hand, the operating range of the pressure regulating valve 36 is the same as that of the inlet valve 34. However, the operating frequency of the pressure regulating valve 36 is higher than that of the diverter valve 38.

[0033] Next, the contents of the second action table 132 will be explained. The opening degrees of the inlet valve 34 in the low-load, medium-load, and high-load regions are set to "75°", "75°", and "75°", respectively. The opening degrees of the pressure regulating valve 36 in the low-load, medium-load, and high-load regions are set to "75°", "75°", and "25°", respectively. The opening degrees of the diverter valve 38 in the low-load, medium-load, and high-load regions are set to "75°", "10°", and "10°", respectively. Thus, in the second action table 132, the operating range of the diverter valve 38 is greater than that of the pressure regulating valve 36. Furthermore, the operating range of the pressure regulating valve 36 is greater than that of the inlet valve 34.

[0034] The characteristics of the first action table 130 and the second action table 132 are summarized as follows: The operating range set for the pressure regulating valve 36 in the first action table 130 is greater than the operating range set for the pressure regulating valve 36 in the second action table 132. Furthermore, the operating range set for the flow divider valve 38 in the first action table 130 is smaller than the operating range set for the flow divider valve 38 in the second action table 132. Also, the operating range set for the inlet valve 34 in the first action table 130 is greater than the operating range set for the inlet valve 34 in the second action table 132.

[0035] (The action pattern determines the processing;) Figure 3 )

[0036] Reference Figure 3 The process of determining the operating mode performed by the control device 10 of the fuel cell system 2 will be explained.

[0037] In S10, the control device 10 decides to operate in the first operating mode. That is, the control device 10 decides to use the first operation table 130 in the memory 100 to control the operation of the inlet valve 34, the pressure regulating valve 36, and the diverter valve 38. If S10 ends, the control device 10 proceeds to S20.

[0038] In S20, the control device 10 monitors the cumulative action amount 110 of the pressure regulating valve in the memory 100, which exceeds the pressure regulating valve threshold 120 in the memory 100. If the cumulative action amount 110 of the pressure regulating valve exceeds the pressure regulating valve threshold 120, the control device 10 determines "yes" in S20 and proceeds to S22.

[0039] In S22, the control device 10 decides to operate in the second operating mode. That is, the control device 10 decides to use the second operation table 132 in the memory 100 to control the operation of the inlet valve 34, the pressure regulating valve 36, and the diverter valve 38. If S22 ends, the control device 10 proceeds to S30. That is, during the period before the cumulative operation amount 110 of the pressure regulating valve exceeds the pressure regulating valve threshold 120, the control device 10 operates in the first operating mode.

[0040] In S30, the control device 10 monitors the flow divider valve's cumulative actuation amount 112 in the memory 100, which exceeds the flow divider valve's threshold 122 in the memory 100. If the cumulative actuation amount 112 of the flow divider valve exceeds the flow divider valve's threshold 122, the control device 10 determines "yes" in S30 and proceeds to S32.

[0041] In step S32, control device 10 determines to operate in the first operating mode. If step S32 ends, control device 10 terminates. Figure 3 The process was completed. Figure 3 In the case of this situation, before the power to the fuel cell system 2 is disconnected, the control device 10 operates in a first operating mode. That is, during the period from when the cumulative action amount 110 of the pressure regulating valve exceeds the pressure regulating valve threshold 120 until the cumulative action amount 112 of the shunt valve exceeds the shunt valve threshold 122, the control device 10 operates in a second operating mode. Moreover, after the cumulative action amount 110 of the pressure regulating valve exceeds the pressure regulating valve threshold 120 and the cumulative action amount 112 of the shunt valve exceeds the shunt valve threshold 122, the control device 10 operates in the first operating mode.

[0042] Hereinafter, the inlet valve 34, the pressure regulating valve 36, and the diversion valve 38 will sometimes be referred to as "multiple auxiliary machines".

[0043] As described above, the fuel cell system 2 includes an airflow path 22 for airflow utilized by the fuel cell system 2, multiple auxiliary units disposed in the airflow path 22, and a control device 10 for controlling the operation of the multiple auxiliary units and selectively executing a first operating mode and a second operating mode. The multiple auxiliary units include a pressure regulating valve 36 (an example of a "first auxiliary unit") and a flow divider valve 38 (an example of a "second auxiliary unit"). The operating range set for the pressure regulating valve 36 in the first operating mode is greater than the operating range set for the pressure regulating valve 36 in the second operating mode. The operating range set for the flow divider valve 38 in the first operating mode is less than the operating amount set for the flow divider valve 38 in the second operating mode. The control device 10 is configured such that when the cumulative operating amount 110 of the pressure regulating valve (an example of a "first cumulative operating amount") is below the pressure regulating valve threshold 120 (an example of a "first predetermined amount"), (in...) Figure 3 If S20 is "No", the first action mode (S10) is executed. If the cumulative action amount of the pressure regulating valve 110 exceeds the pressure regulating valve threshold 120 (if S20 is "Yes"), the second action mode (S22) is executed.

[0044] According to the above structure, when the cumulative actuation amount 110 of the pressure regulating valve exceeds the pressure regulating valve threshold 120, the control device 10 executes the second operating mode. By increasing the operating range set for the diversion valve 38 in the second operating mode, the operating range set for the pressure regulating valve 36 in the second operating mode can be reduced. Therefore, by executing the second operating mode, the load on the pressure regulating valve 36 can be reduced, and the load on the diversion valve 38 can be increased. Thus, the load of multiple auxiliary machines can be balanced.

[0045] In this embodiment, in particular, the load on the pressure regulating valve 36 in the first operating mode is greater than the load on the flow divider valve 38 in the first operating mode. On the other hand, the load on the pressure regulating valve 36 in the second operating mode is less than the load on the flow divider valve 38 in the second operating mode. Therefore, the loads on the pressure regulating valve 36 and the flow divider valve 38 can be balanced.

[0046] Additionally, the fuel cell system 2 also includes an air compressor 20 and a fuel cell stack 4. The air flow path 22 includes an air supply flow path 24 (an example of a "supply flow path") that supplies air from the air compressor 20 to the fuel cell stack 4, an air discharge flow path 26 (an example of a "discharge flow path") that recovers the reacted air discharged from the fuel cell stack 4, and a bypass flow path 28 connecting a first position 24A of the air supply flow path 24 to a second position 26A of the air discharge flow path 26. A pressure regulating valve 36 (an example of a "first control valve") is positioned upstream of the second position 26A in the air discharge flow path 26, and a diverter valve 38 (an example of a "second control valve") is located in the bypass flow path 28.

[0047] Based on the above structure, the load of the pressure regulating valve 36 and the load of the diverter valve 38 can be balanced.

[0048] Furthermore, the control device 10 is configured to execute a second operating mode (S22) when the cumulative action amount 110 of the pressure regulating valve exceeds the pressure regulating valve threshold 120 and the cumulative action amount 112 of the diverter valve 38 (an example of the "second cumulative action amount") is below the diverter valve threshold 122 (an example of the "second specified amount") (in S30, "No"), and to execute a first operating mode (S32) when the cumulative action amount 110 of the pressure regulating valve exceeds the pressure regulating valve threshold 120 and the cumulative action amount 112 of the diverter valve exceeds the diverter valve threshold 122 (in S30, "Yes").

[0049] According to the above structure, the control device 10 can return to the first operating mode at an appropriate time.

[0050] Additionally, several auxiliary devices include an inlet valve 34 (an example of a "third control valve") located downstream of the first position 24A in the air supply flow path 24. The operating range set for the inlet valve 34 in the first operating mode is greater than the operating range set for the inlet valve 34 in the second operating mode.

[0051] Based on the above structure, the load on the diversion valve 38 and the load on the inlet valve 34 can be balanced.

[0052] The specific examples of the present invention have been described in detail above, but these are merely illustrative and do not limit the scope of protection claimed in this application. The technology described within the scope of protection of this application includes technologies obtained by various modifications and alterations to the specific examples described above.

[0053] (First Modification) In the above embodiment, the control device 10 changes the operating range of the inlet valve 34, the pressure regulating valve 36, and the diverter valve 38 in the first operating mode and the second operating mode. In a modification, the control device 10 can change the operating frequency of the injector 54 and the LSV 56 in the first operating mode and the second operating mode. In this modification, the memory 100 of the control device 10 stores the cumulative injector action amount, the cumulative LSV action amount, the injector threshold, and the LSV threshold. The cumulative injector action amount is a value representing the cumulative action amount (e.g., the number of actions) of the injector 54. The cumulative LSV action amount is a value representing the cumulative action amount (e.g., the number of actions) of the LSV 56. As an example, the injector threshold and the LSV threshold are values ​​obtained by multiplying the upper limit action amount of the injector 54 by "0.7" and the upper limit action amount of the LSV 56 by "0.7", respectively. The upper limit action amount of the injector 54 and the upper limit action amount of the LSV 56 are determined through endurance tests, etc.

[0054] Control device 10 activates injector 54 in the low-load region of the first operating mode and activates LSV 56 in the medium-load and high-load regions of the first operating mode. It is assumed that the fuel cell system 2 operates more frequently in the low-load region than in the medium-load and high-load regions. In this case, injector 54 operates more frequently than LSV 56. That is, in the first operating mode, the load on injector 54 is greater than the load on LSV 56.

[0055] Therefore, in this modified example, the control device 10 operates the injector 54 and LSV 56 in the low-load region of the second operating mode, and operates the LSV 56 in the medium-load and high-load regions of the second operating mode. By operating the injector 54 and LSV 56 in the low-load region, the operating frequency of the injector 54 in the low-load region can be reduced compared to a structure where the injector 54 operates alone in the low-load region. Furthermore, by operating the LSV 56 in the low-load, medium-load, and high-load regions, the operating frequency of the LSV 56 can be increased. With this structure, the load on the injector 54 and the load on the LSV 56 can be balanced.

[0056] In this variation, hydrogen is an example of a "fluid". Hydrogen flow path 52 is an example of "more than one flow path". Injector 54 and LSV 56 are examples of "multiple auxiliary machines". Injector 54 and LSV 56 are examples of "first auxiliary machine" and "second auxiliary machine", respectively.

[0057] In addition, in other variations, the control device 10 can change the operation of the inlet valve 34, pressure regulating valve 36, flow divider valve 38, injector 54 and LSV 56 in the first operating mode and the second operating mode.

[0058] (Second variation) can be omitted Figure 3 S30 and S32. In this modified example, after the determination is "yes" in S20, the control device 10 operates in the first operation mode.

[0059] (Third variation) The operation of the inlet valve 34 in the first and second operation modes can also be the same.

[0060] Furthermore, the technical elements described in this specification or drawings exert their technical usefulness individually or in various combinations, and are not limited to the combinations described in the technical solution at the time of application. Additionally, the technologies illustrated in this specification or drawings can achieve multiple objectives simultaneously, and achieving even one of these objectives is itself technically useful.

[0061] [Explanation of reference numerals in the attached figures]

[0062] 2…Fuel cell system; 4…Fuel cell stack; 6…Air supply system; 8…Hydrogen cycle system; 10…Control device; 20…Air compressor; 22…Air flow path; 24…Air supply flow path; 24A…First position; 26…Air discharge flow path; 26A…Second position; 28…Bypass flow path; 30…Check valve; 32…First pressure sensor; 34…Inlet valve; 36…Pressure regulating valve; 38…Diverter valve; 50…Fuel tank; 52…Hydrogen flow path; 54…Injector; 56…LSV; 58…Ejector; 60…Gas… Liquid separator; 70… Hydrogen supply path; 72… Hydrogen discharge path; 74… Circulation path; 76… Exhaust and drain path; 80… First supply path; 82… Second supply path; 84… Third supply path; 90… Second pressure sensor; 92… Third pressure sensor; 94… Exhaust and drain valve; 100… Memory; 102… Program; 110… Accumulated action of pressure regulating valve; 112… Accumulated action of diverter valve; 120… Pressure regulating valve threshold; 122… Diverter valve threshold; 130… First action table; 132… Second action table.

Claims

1. A fuel cell system, wherein, have: One or more flow paths for fluid flow utilized by the fuel cell system; Multiple auxiliary machines are arranged in one or more flow paths; and The control device is capable of controlling the actions of the plurality of auxiliary machines, and can selectively execute a first action mode and a second action mode. The plurality of auxiliary machines include a first auxiliary machine and a second auxiliary machine. The range of motion or the number of opportunities for motion set for the first auxiliary machine in the first operating mode is greater than the range of motion or the number of opportunities for motion set for the first auxiliary machine in the second operating mode. The range of motion or the number of opportunities for motion set for the second auxiliary machine in the first operating mode is smaller than the range of motion or the number of opportunities for motion set for the second auxiliary machine in the second operating mode. The control device is configured to execute the first operation mode when the first cumulative action amount of the first auxiliary machine is below the first predetermined amount, and to execute the second operation mode when the first cumulative action amount exceeds the first predetermined amount.

2. The fuel cell system according to claim 1, wherein, The fuel cell system also includes an air compressor and a fuel cell stack. The one or more flow paths have: A supply path is provided to supply air from the air compressor to the fuel cell stack; The exhaust flow path recovers the reacted air discharged from the fuel cell stack; as well as A bypass flow path is provided, connecting the first position of the supply flow path to the second position of the discharge flow path. The first auxiliary device is a first control valve located upstream of the second position in the discharge flow path. The second auxiliary device is a second control valve located in the bypass flow path.

3. The fuel cell system according to claim 2, wherein, The control device is configured to execute the second operation mode when the first cumulative action amount exceeds the first predetermined amount and the second cumulative action amount of the second auxiliary machine is below the second predetermined amount, and to execute the first operation mode when the first cumulative action amount exceeds the first predetermined amount and the second cumulative action amount exceeds the second predetermined amount.

4. The fuel cell system according to claim 2, wherein, The plurality of auxiliary machines include a third control valve located in the supply flow path at a position downstream of the first position. The range of motion set for the third control valve in the first operating mode is greater than the range of motion set for the third control valve in the second operating mode.

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