Control method and device of fuel cell system and electronic equipment

Abstract

The invention relates to the technical field of vehicles, and discloses a control method and device of a fuel cell system and electronic equipment.The method comprises the steps that the hydrogen supply pressure of a hydrogen supply system and the hydrogen inlet pressure of a gas inlet of a fuel cell stack are obtained; and controlling a straight-through proportional valve, a proportional valve assembly, a hydrogen circulating pump and an ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure of the gas inlet of the fuel cell stack meets the target pressure requirement. According to the control method disclosed by the invention, the straight-through proportional valve, the proportional valve assembly, the hydrogen circulating pump and the ejector are controlled according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure of the gas inlet of the fuel cell stack meets the target pressure requirement, and various supply pressure conditions such as a gas hydrogen supply system and a liquid hydrogen supply system can be considered; the high-power working condition output requirement of a fuel cell system is met, the operation condition of a fuel cell stack is met, and stable and efficient work of a fuel cell is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a control method for a fuel cell system, a control device for a fuel cell system, an electronic device, and a computer-readable storage medium. Background Art

[0002] Currently, the fuel cell vehicles mainly use gaseous hydrogen storage systems. Gaseous hydrogen has the characteristic of low energy density, while liquid hydrogen has a higher energy density compared to gaseous hydrogen, and also has advantages such as efficient transportation and longer storage time.

[0003] In the related art, when the proportional valve for the high hydrogen supply pressure system is used in the low hydrogen supply pressure system, the following situations will occur: First, when the fuel cell system is in a high current density working condition, the opening of the original proportional valve becomes larger and cannot meet the inlet pressure requirement at the front end of the ejector. Second, on the premise that the original proportional valve can meet the inlet pressure requirement at the front end of the ejector, the proportional valve needs to increase the opening to maintain the inlet pressure requirement at the front end of the ejector. Compared with the original hydrogen supply system, the hydrogen supply flow rate of the proportional valve is smaller, and there may be a risk that the flow rate of the proportional valve is difficult to meet the new hydrogen flow rate requirement. When the proportional valve for the low hydrogen supply pressure system works in the high hydrogen supply pressure system, the opening range of the proportional valve is reduced, resulting in an increase in the difficulty of accurately controlling the proportional valve by the control system. Summary of the Invention

[0004] The first object of the present invention is to propose a control method for a fuel cell system, which controls a direct-through proportional valve, a proportional valve assembly, a hydrogen circulation pump, and an ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement, which can take into account both the gaseous hydrogen supply system and the liquid hydrogen supply system and other situations of various supply pressures, meet the output requirements of the high-power working condition of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0005] The second object of the present invention is to propose a control device for a fuel cell system.

[0006] The third object of the present invention is to propose an electronic device.

[0007] The fourth object of the present invention is to propose a computer-readable storage medium.

[0008] To achieve the above object, a control method for a fuel cell system according to the first aspect embodiment of the present invention includes: obtaining the hydrogen supply pressure of the hydrogen supply system and the hydrogen inlet pressure at the inlet of the fuel cell stack; controlling a direct-through proportional valve, a proportional valve assembly, a hydrogen circulation pump, and an ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement.

[0009] In addition, the control method of the fuel cell system according to the above embodiments of the present invention may further have the following additional technical features:

[0010] According to some embodiments of the present invention, the above method further includes: obtaining the vehicle power demand and the power of the fuel cell auxiliary system of the fuel cell system; calculating the target power demand of the fuel cell stack according to the vehicle power demand and the power of the fuel cell auxiliary system; and determining the target pressure demand of the intake port of the fuel cell stack according to the target power demand.

[0011] According to some embodiments of the present invention, the proportional valve assembly includes a first proportional valve and a second proportional valve; the hydrogen supply pressure applicable to the first proportional valve is greater than the hydrogen supply pressure applicable to the second proportional valve; controlling the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen intake pressure so that the hydrogen intake pressure at the intake port of the fuel cell stack meets the target pressure demand, including: determining whether the output pressure of the ejector can meet the target pressure demand; in response to the output pressure of the ejector not being able to meet the target pressure demand, controlling to turn on the hydrogen circulation pump and the direct-through proportional valve, and controlling to turn off the first proportional valve and the second proportional valve.

[0012] According to some embodiments of the present invention, the method further includes: in response to the output pressure of the ejector being able to meet the target pressure demand, determining whether the ejector can operate independently; in response to the ejector being able to operate independently, controlling to turn off the hydrogen circulation pump; in response to the ejector not being able to operate independently, controlling to turn on the hydrogen circulation pump.

[0013] According to some embodiments of the present invention, the above method further includes: comparing the hydrogen supply pressure with a preset hydrogen supply pressure; in response to the hydrogen supply pressure being greater than the preset hydrogen supply pressure, controlling to turn on the first proportional valve, controlling to turn off the second proportional valve and the direct-through proportional valve; in response to the hydrogen supply pressure being less than or equal to the preset hydrogen supply pressure, controlling to turn on the second proportional valve, controlling to turn off the first proportional valve and the direct-through proportional valve.

[0014] According to some embodiments of the present invention, the proportional valve assembly includes a third proportional valve and a fourth proportional valve; the hydrogen supply pressure applicable to the third proportional valve is the same as the hydrogen supply pressure applicable to the fourth proportional valve; controlling the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen intake pressure so that the hydrogen intake pressure at the intake port of the fuel cell stack meets the target pressure demand, including: determining whether the output pressure of the ejector can meet the target pressure demand; in response to the output pressure of the ejector not being able to meet the target pressure demand, controlling to turn on the hydrogen circulation pump and the direct-through proportional valve, and controlling to turn off the third proportional valve and the fourth proportional valve.

[0015] According to some embodiments of the present invention, the above method further includes: determining whether the ejector can operate independently in response to the output pressure of the ejector being able to meet the target pressure requirement; controlling to close the hydrogen circulation pump and the direct-through proportional valve and controlling to open the third proportional valve and the fourth proportional valve in response to the ejector being able to operate independently; controlling to open the hydrogen circulation pump, the third proportional valve and the fourth proportional valve and controlling to close the direct-through proportional valve in response to the ejector not being able to operate independently.

[0016] A control method for a fuel cell system according to an embodiment of the present invention includes: obtaining the hydrogen supply pressure of a hydrogen supply system and the hydrogen inlet pressure at the inlet of a fuel cell stack; controlling a direct-through proportional valve, a proportional valve assembly, a hydrogen circulation pump and an ejector according to the hydrogen supply pressure and the hydrogen inlet pressure so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement. Thus, by controlling the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement, this method can take into account both the gaseous hydrogen supply system and various supply pressure situations such as the liquid hydrogen supply system, meet the high-power operating condition output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0017] A second object of the present invention is to propose a control device for a fuel cell system, which can take into account both the gaseous hydrogen supply system and various supply pressure situations such as the liquid hydrogen supply system by controlling a direct-through proportional valve, a proportional valve assembly, a hydrogen circulation pump and an ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, meet the high-power operating condition output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0018] To achieve the above object, an embodiment of the second aspect of the present invention proposes a control device for a fuel cell system, including: an acquisition module configured to acquire the hydrogen supply pressure of a hydrogen supply system and the hydrogen inlet pressure at the inlet of a fuel cell stack; a control module configured to control a direct-through proportional valve, a proportional valve assembly, a hydrogen circulation pump and an ejector according to the hydrogen supply pressure and the hydrogen inlet pressure so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement.

[0019] A control device for a fuel cell system according to an embodiment of the present invention includes: an acquisition module configured to acquire the hydrogen supply pressure of a hydrogen supply system and the hydrogen inlet pressure at the inlet of a fuel cell stack; a control module configured to control a direct-through proportional valve, a proportional valve assembly, a hydrogen circulation pump, and an ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement. Thus, by controlling the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement, this device can take into account both the gaseous hydrogen supply system and various supply pressure situations such as the liquid hydrogen supply system, meet the high-power operating conditions output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0020] To achieve the above object, an embodiment of the third aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the above control method of the fuel cell system.

[0021] The electronic device according to an embodiment of the present invention, by executing the above control method of the fuel cell system, controls the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement. It can take into account both the gaseous hydrogen supply system and various supply pressure situations such as the liquid hydrogen supply system, meet the high-power operating conditions output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0022] To achieve the above object, an embodiment of the fourth aspect of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to implement the above control method of the fuel cell system.

[0023] The computer-readable storage medium according to an embodiment of the present invention, by executing the above control method of the fuel cell system, controls the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement. It can take into account both the gaseous hydrogen supply system and various supply pressure situations such as the liquid hydrogen supply system, meet the high-power operating conditions output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A block diagram of a fuel cell system according to some embodiments of the present invention;

[0026] Figure 2 A flowchart of a control method for a fuel cell system according to some embodiments of the present invention;

[0027] Figure 3 A flowchart of a control method for a fuel cell system according to some other embodiments of the present invention;

[0028] Figure 4 A flowchart of a control method for a fuel cell system according to some further embodiments of the present invention;

[0029] Figure 5 A block diagram of a control device for a fuel cell system according to some embodiments of the present invention;

[0030] Figure 6 A block diagram of an electronic device according to some embodiments of the present invention;

[0031] Figure 7 A block diagram of a vehicle according to some embodiments of the present invention.

[0032] Description of reference numerals:

[0033] 100 - Fuel cell system, A13 - Fuel cell stack, A6 - Direct flow proportional valve, A7 - Proportional valve assembly, A4 - First pressure sensor, A11 - Second pressure sensor, A16 - Third pressure sensor, A5 - First temperature sensor, A12 - Second temperature sensor, A15 - Third temperature sensor, A10 - Hydrogen circulation pump, A9 - Ejector, A14 - Separator, A18 - Drain valve, A19 - Nitrogen discharge valve, A2 - Hydrogen heat exchanger, A3 - Hydrogen shut-off valve, A1 - Hydrogen supply system, A20 - Controller, and 700 - Vehicle. Detailed description of specific embodiments

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0035] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the embodiments of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0036] As described in the background art section, currently, fuel cell vehicles mainly use gaseous hydrogen storage systems. Gaseous hydrogen has the characteristic of low energy density, while liquid hydrogen has a higher energy density compared to gaseous hydrogen and also has advantages such as efficient transportation and longer storage time. The supply pressure of the liquid hydrogen storage system is very different from that of the gaseous hydrogen storage system. It can meet the operating conditions of the fuel cell stack at low power, but under high-power operating conditions, the required pressure of the ejector will be greater than the supply pressure of the liquid hydrogen, and the ejector cannot work. When a liquid hydrogen supply system is installed, high-power output of the fuel cell cannot be achieved.

[0037] The applicant found during the implementation of the present invention that in the related art, when a proportional valve for a high hydrogen supply pressure system is used in a low hydrogen supply pressure system, the following situations will occur: First, when the fuel cell system is in a high current density operating condition, the opening of the original proportional valve becomes larger and cannot meet the pressure requirement at the front-end inlet of the ejector, indicating that the original proportional valve is not applicable and will cause the lack of high-power operating conditions of the ejector. Second, on the premise that the original proportional valve can meet the pressure requirement at the front-end inlet of the ejector, the proportional valve needs to increase its opening to maintain the pressure requirement at the front-end inlet of the ejector. Compared with the original hydrogen supply system, the hydrogen supply flow rate of the proportional valve is smaller, which may lead to the risk that the flow rate of the proportional valve is difficult to meet the new hydrogen flow rate requirement. When a proportional valve for a low hydrogen supply pressure system operates in a high hydrogen supply pressure system, the opening range of the proportional valve is reduced, resulting in an increase in the difficulty of accurately controlling the proportional valve by the control system.

[0038] Therefore, a high-pressure adapted proportional valve in a low hydrogen supply pressure system causes an increase in the opening interval of the proportional valve and an improvement in control accuracy, but may not meet the front-end pressure requirement and system flow requirement of the ejector in the low hydrogen supply pressure system; a low-pressure adapted proportional valve operating in a high hydrogen supply pressure system will cause a reduction in the opening range of the proportional valve and a decrease in control accuracy.

[0039] Accordingly, the present invention controls the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement, which can take into account both the gaseous hydrogen supply system and various supply pressure situations such as the liquid hydrogen supply system, meet the high-power operating conditions output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0040] The following describes a control method for a fuel cell system, a control device for a fuel cell system, an electronic device, and a storage medium according to embodiments of the present invention with reference to the accompanying drawings.

[0041] Reference Figure 1 , is a schematic block diagram of a fuel cell system according to some embodiments of the present invention.

[0042] The fuel cell system 100 of the present invention includes a fuel cell stack A13, a direct-through proportional valve A6, a proportional valve assembly A7, a first pressure sensor A4, a second pressure sensor A11, a hydrogen circulation loop, and a controller A20.

[0043] The inlet of the direct-through proportional valve A6 is connected to the hydrogen supply system A1, and the outlet of the direct-through proportional valve A6 is connected to the inlet of the fuel cell stack A13.

[0044] The inlet of the proportional valve assembly A7 is connected to the hydrogen supply system A1, and the outlet of the proportional valve assembly A7 is connected to the inlet of the fuel cell stack A13 through an ejector A9.

[0045] The first pressure sensor A4 is disposed at the outlet of the hydrogen supply system A1, and the first pressure sensor A4 is connected to the inlet of the proportional valve assembly A7 and the inlet of the direct-through proportional valve A6, and is used to detect the hydrogen supply pressure of the hydrogen supply system A1, so as to control the opening or closing of the proportional valve assembly A7 and the direct-through proportional valve A6 according to the hydrogen supply pressure of the hydrogen supply system A1.

[0046] The second pressure sensor A11 is disposed at the inlet of the fuel cell stack A13, and is used to detect the hydrogen inlet pressure at the inlet of the fuel cell stack A13, so as to adjust the opening degree of the proportional valve assembly A7 or the direct-through proportional valve A6 according to the hydrogen inlet pressure at the inlet of the fuel cell stack A13.

[0047] The hydrogen circulation loop includes a hydrogen circulation pump A10. The exhaust port of the fuel cell stack A13 is connected to the inlet of the hydrogen circulation pump A10, and the outlet of the hydrogen circulation pump A10 is connected to the inlet of the ejector A9. The hydrogen circulation pump A10 is used to recycle the unreacted hydrogen at the exhaust port of the fuel cell stack back to the inlet of the fuel cell stack, thereby reducing the waste of hydrogen and improving the utilization rate of hydrogen.

[0048] The controller A20 is communicatively connected to the direct-through proportional valve A6, the proportional valve assembly A7, the ejector A9, the hydrogen circulation pump A10, the first pressure sensor A4, and the second pressure sensor A11, and is configured to control the direct-through proportional valve A6, the proportional valve assembly A7, the hydrogen circulation pump A10, and the ejector A9 according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack A13 meets the target pressure requirement.

[0049] The controller A20 is further configured to control the opening degree of the first proportional valve or the second proportional valve according to the hydrogen inlet pressure of the hydrogen supply system A1. The controller A20 is further configured to adjust the opening degree of the first proportional valve or the second proportional valve according to the target pressure requirement of the fuel cell stack A13.

[0050] As a specific embodiment, the controller A20 is further configured to simultaneously control the opening degrees of the third proportional valve and the fourth proportional valve according to the hydrogen inlet pressure of the hydrogen supply system A1. The controller A20 is further configured to simultaneously adjust the opening degrees of the third proportional valve and the fourth proportional valve according to the target pressure requirement of the fuel cell stack A13.

[0051] The hydrogen circulation loop further includes a separator A14. The exhaust port of the fuel cell stack A13 is connected to the inlet of the separator A14, and the outlet of the separator A14 is connected to the inlet of the hydrogen circulation pump A10. The separation pump is configured to separate different components in the exhaust gas of the fuel cell stack A13.

[0052] The separator A14 further includes a drain port and a nitrogen discharge port. The drain port is communicated with the external environment through a drain valve A18, and the nitrogen discharge port is communicated with the external environment through a nitrogen discharge valve A19. The drain port is configured to discharge the waste water and water vapor discharged from the exhaust port of the fuel cell stack A13, and the nitrogen discharge port is configured to discharge the nitrogen discharged from the exhaust port of the fuel cell stack A13.

[0053] The proportional valve assembly A7 includes a first proportional valve and a second proportional valve. The first proportional valve and the second proportional valve are connected in parallel and are different from each other. The controller A20 is configured to control the opening of the first proportional valve or the second proportional valve according to the hydrogen supply pressure of the hydrogen supply system A1. For example, when the hydrogen supply pressure is relatively high, only the first proportional valve is controlled to open; when the hydrogen supply pressure is relatively low, only the second proportional valve is controlled to open.

[0054] As a specific embodiment, the proportional valve assembly A7 includes a third proportional valve and a fourth proportional valve. The third proportional valve and the fourth proportional valve are connected in parallel and are the same. The controller A20 is configured to simultaneously control the opening of the third proportional valve and the fourth proportional valve or simultaneously control the closing of the third proportional valve and the fourth proportional valve according to the hydrogen supply pressure. For example, when the hydrogen supply pressure is relatively low, the third proportional valve and the fourth proportional valve are simultaneously controlled to open.

[0055] The fuel cell system 100 further includes a hydrogen heat exchanger A2 and a hydrogen shut-off valve A3. The outlet of the hydrogen supply system A1 is connected to the inlet of the hydrogen heat exchanger A2. The outlet of the hydrogen heat exchanger A2 is connected to the inlet of the direct-through proportional valve A6 and the inlet of the proportional valve assembly A7. The hydrogen heat exchanger A2 is used to heat hydrogen to the reaction temperature required by the fuel cell, reduce the cold start time, and extend the service life of the fuel cell. The hydrogen shut-off valve A3 is arranged between the outlet of the hydrogen heat exchanger A2 and the inlets of the direct-through proportional valve A6 and the proportional valve assembly A7. The hydrogen shut-off valve A3 is used to quickly cut off the hydrogen supply in case of emergency, prevent hydrogen leakage, and thus avoid possible fire or explosion accidents.

[0056] The fuel cell system 100 further includes a third pressure sensor A16. The third pressure sensor A16 is arranged at the exhaust port of the fuel cell stack A13 and is used to detect the pressure of the mixture discharged from the exhaust port of the fuel cell stack A13.

[0057] The fuel cell system 100 further includes a first temperature sensor A5, a second temperature sensor A12, and a third temperature sensor A15. The first temperature sensor A5 is arranged at the outlet of the hydrogen supply system A1. The first temperature sensor A5 is connected to the first pressure sensor A4. The first temperature sensor A5 is used to detect the hydrogen supply temperature of the hydrogen supply system A1. The second temperature sensor A12 is arranged at the inlet of the fuel cell stack A13. The second temperature sensor A12 is connected to the second pressure sensor A11. The second temperature sensor A12 is used to detect the hydrogen inlet temperature at the inlet of the fuel cell stack A13. The third temperature sensor A15 is arranged at the exhaust port of the fuel cell stack A13. The third temperature sensor A15 is connected to the third pressure sensor A16. The third temperature sensor A15 is used to detect the temperature of the mixture discharged from the exhaust port of the fuel cell stack A13.

[0058] Thus, the fuel cell system 100 of the present invention includes a fuel cell stack A13, a direct-through proportional valve A6, a proportional valve assembly A7 (the first proportional valve and the second proportional valve or the third proportional valve and the fourth proportional valve), a first pressure sensor A4, a second pressure sensor A11, a third pressure sensor A16, a first temperature sensor A5, a second temperature sensor A12, a third temperature sensor A15, a hydrogen circulation pump A10, an ejector A9, a separator A14, a hydrogen heat exchanger A2, a hydrogen shut-off valve A3, a drain valve A18, a nitrogen discharge valve A19, a hydrogen supply system A1, and a controller A20.

[0059] The hydrogen of the hydrogen supply system A1 first enters the hydrogen heat exchanger A2 and the hydrogen shut-off valve A3, and then the first pressure sensor A4 detects the pressure of the hydrogen and sends the detected hydrogen pressure to the controller A20. The controller A20 controls the opening or closing of the proportional valve assembly A7 and the direct-through proportional valve A6 according to the magnitude of the pressure. When the proportional valve assembly A7 is opened and the direct-through proportional valve A6 is closed, the hydrogen enters the proportional valve assembly A7 and the ejector A9. The second pressure sensor A11 detects the pressure of the hydrogen coming out of the ejector A9. When the pressure of the hydrogen coming out of the ejector A9 meets the target pressure requirement of the fuel cell stack A13, it means that the opening degree of the proportional valve assembly A7 is adjusted just right and there is no need to adjust the opening degree of the proportional valve assembly A7 anymore. When the pressure of the hydrogen coming out of the ejector A9 does not meet the target pressure requirement of the fuel cell stack A13, it means that the opening degree of the proportional valve assembly A7 is not adjusted properly and the opening degree of the proportional valve assembly A7 still needs to be adjusted so that the hydrogen inlet pressure at the inlet of the fuel cell stack A13 meets the target pressure requirement. When the proportional valve assembly A7 is closed and the direct-through proportional valve A6 is opened, the hydrogen enters the direct-through proportional valve A6. The second pressure sensor A11 detects the pressure of the hydrogen coming out of the direct-through proportional valve A6. When the pressure of the hydrogen coming out of the direct-through proportional valve A6 meets the target pressure requirement of the fuel cell stack A13, it means that the opening degree of the direct-through proportional valve A6 is adjusted just right and there is no need to adjust the opening degree of the direct-through proportional valve A6 anymore. When the pressure of the hydrogen coming out of the direct-through proportional valve A6 does not meet the target pressure requirement of the fuel cell stack A13, it means that the opening degree of the direct-through proportional valve A6 is not adjusted properly and the opening degree of the direct-through proportional valve A6 still needs to be adjusted so that the hydrogen inlet pressure at the inlet of the fuel cell stack A13 meets the target pressure requirement.

[0060] Then, the waste water and water vapor discharged from the exhaust port of the fuel cell stack A13 are discharged to the external environment through the drain valve A18, and the nitrogen discharged from the exhaust port of the fuel cell stack A13 is discharged to the external environment through the nitrogen discharge valve A19.

[0061] Reference Figure 2 is a flowchart of a control method for a fuel cell system according to some embodiments of the present invention.

[0062] As Figure 2 shown, the control method of the fuel cell system according to the embodiments of the present invention may include the following steps:

[0063] S201, obtain the hydrogen supply pressure of the hydrogen supply system and the hydrogen inlet pressure at the inlet of the fuel cell stack.

[0064] Specifically, the hydrogen supply pressure of the hydrogen supply system can be detected by the first pressure sensor provided at the outlet of the hydrogen supply system, and the hydrogen inlet pressure at the inlet of the fuel cell stack can be detected by the second pressure sensor provided at the inlet of the fuel cell stack.

[0065] S202. Control the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement.

[0066] Specifically, after obtaining the hydrogen supply pressure of the hydrogen supply system and the hydrogen inlet pressure at the inlet of the fuel cell stack, control the opening or closing of the direct-through proportional valve and the proportional valve assembly according to the hydrogen supply pressure and the hydrogen inlet pressure, and control the opening or closing of the hydrogen circulation pump, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement. For example, when the fuel cell is of low power and the hydrogen supply pressure is high, control the first proportional valve in the proportional valve assembly to open, control the second proportional valve to close, and control the direct-through proportional valve to close; in this state, the ejector does not have normal ejecting ability, so control the hydrogen circulation pump to open to realize the hydrogen return function. Another example is that when the fuel cell is of medium-high power and the hydrogen supply pressure is high, control the first proportional valve in the proportional valve assembly to open, control the second proportional valve to close, and control the direct-through proportional valve to close. The ejector has normal ejecting ability, so the hydrogen circulation pump can be controlled to stop working. Still another example is that when the fuel cell is of low power and the hydrogen supply pressure is low, control the first proportional valve in the proportional valve assembly to close, control the second proportional valve to open, and control the direct-through proportional valve to close. The ejector does not have normal ejecting ability, so control the hydrogen circulation pump to open to realize the hydrogen return function. Thus, it can take into account both the gaseous hydrogen supply system and the liquid hydrogen supply system and other situations of supply pressures, meet the output requirements of the high-power working conditions of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0067] In some embodiments of the present invention, the above method further includes: obtaining the vehicle power demand and the power of the fuel cell auxiliary system of the fuel cell system; calculating the target power demand of the fuel cell stack according to the vehicle power demand and the power of the fuel cell auxiliary system; and determining the target pressure demand at the inlet of the fuel cell stack according to the target power demand.

[0068] To meet specific power and voltage requirements, fuel cell monomers are usually carefully combined into a fuel cell stack and equipped with corresponding auxiliary devices, such as an air compressor and a hydrogen circulation pump (multiple auxiliary devices can form a fuel cell auxiliary system). Under the intelligent regulation of the fuel cell control unit, these components work together to ensure the stable operation of the fuel cell system. The fuel cell auxiliary system is responsible for maintaining its continuous, stable and safe working state.

[0069] Specifically, first, the overall vehicle power demand can be determined based on the vehicle's operating state (such as acceleration, deceleration, constant speed, etc.) and the driver's demand (such as the force of stepping on the accelerator). This overall vehicle power demand is a general demand that covers the power consumption of all power systems of the vehicle. Further, the ECU (Electronic Control Unit) receives data from various sensors, including information on the overall vehicle power demand. Then, the ECU calculates the power that the fuel cell needs to provide based on this information. Further, the FCCU (Fuel Cell Control Unit) receives the power demand information for the fuel cell from the ECU. Then, the FCCU calculates the intake demand of the fuel cell stack based on this power demand and the operating characteristics of the fuel cell (such as the performance curve of the stack, reaction efficiency, etc.). The intake demand includes parameters such as gas pressure, flow rate, temperature, and humidity, which are crucial for the performance and lifespan of the fuel cell. Finally, to meet the intake demand of the fuel cell stack, the FCCU controls a series of actuators for dynamic adjustment. These actuators can include proportional valves (for adjusting gas flow rate and pressure), hydrogen circulation pumps (for improving hydrogen utilization), air compressors (for providing sufficient gas pressure), and humidifiers (for adjusting gas humidity), etc. The coordinated operation of these actuators can ensure that the intake demand of the fuel cell stack is met, thus meeting the overall vehicle power demand.

[0070] In some embodiments of the present invention, the proportional valve assembly includes a first proportional valve and a second proportional valve; the hydrogen supply pressure applicable to the first proportional valve is greater than the hydrogen supply pressure applicable to the second proportional valve; controlling the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen intake pressure so that the hydrogen intake pressure at the intake port of the fuel cell stack meets the target pressure demand, including: determining whether the output pressure of the ejector can meet the target pressure demand; in response to the output pressure of the ejector not being able to meet the target pressure demand, controlling to turn on the hydrogen circulation pump and the direct-through proportional valve, and controlling to turn off the first proportional valve and the second proportional valve.

[0071] Specifically, when the proportional valve assembly includes a first proportional valve and a second proportional valve, under the high hydrogen supply pressure state, the ejector can meet the pressure requirement of the fuel cell stack. The hydrogen supply pressure applicable to the first proportional valve is greater than that applicable to the second proportional valve. That is, the first proportional valve can be a high-pressure adaptation proportional valve, and the second proportional valve can be a low-pressure adaptation proportional valve. Compare the output pressure of the ejector with the target pressure requirement at the intake port of the fuel cell stack to determine whether the output pressure of the ejector can meet the target pressure requirement at the intake port of the fuel cell stack. When the output pressure of the ejector cannot meet the target pressure requirement, it can indicate that the ejector does not have normal ejecting ability, and the fuel cell is in a high-power state. At this time, control to turn on the hydrogen circulation pump and the direct-through proportional valve, and control to turn off the first proportional valve and the second proportional valve, so that the hydrogen supply pressure at the intake port of the fuel cell stack meets the target pressure requirement, realizing the normal output in the full power range of the fuel cell. Thus, by using the direct-through proportional valve to connect the hydrogen shut-off valve and the fuel cell stack respectively, the situation where the hydrogen supply pressure of the direct-through proportional valve or the hydrogen supply pressure of the fuel cell system cannot meet the pressure requirement at the front end of the ejector can be realized to make up for the lack of the power range with high current density of the fuel cell stack.

[0072] In some embodiments of the present invention, the method further includes: in response to the output pressure of the ejector being able to meet the target pressure requirement, determining whether the ejector can work independently; in response to the ejector being able to work independently, controlling to turn off the hydrogen circulation pump; in response to the ejector not being able to work independently, controlling to turn on the hydrogen circulation pump.

[0073] Specifically, when the output pressure of the ejector can meet the target pressure requirement, it can indicate that the ejector has normal ejecting ability, and the fuel cell is in a low-power state or a medium-high power state. Then, determine again whether the ejector can work independently. When the ejector can work independently, it can indicate that the vehicle power requirement is within the working power range of the ejector, and the fuel cell is in a medium-high power state. There is no need to use the hydrogen circulation pump as an auxiliary device to recover hydrogen. At this time, control to turn off the hydrogen circulation pump to reduce energy consumption. When the ejector cannot work independently, it can indicate that the vehicle power requirement is not within the working power range of the ejector, and the fuel cell is in a low-power state. It is necessary to use the hydrogen circulation pump as an auxiliary device to recover hydrogen. At this time, control to turn on the hydrogen circulation pump.

[0074] In some embodiments of the present invention, the above method further includes: comparing the hydrogen supply pressure with a preset hydrogen supply pressure; in response to the hydrogen supply pressure being greater than the preset hydrogen supply pressure, controlling to turn on the first proportional valve, controlling to turn off the second proportional valve and the direct-through proportional valve; in response to the hydrogen supply pressure being less than or equal to the preset hydrogen supply pressure, controlling to turn on the second proportional valve, controlling to turn off the first proportional valve and the direct-through proportional valve.

[0075] Specifically, after detecting the hydrogen supply pressure of the hydrogen supply system, compare the hydrogen supply pressure with a preset hydrogen supply pressure. Here, the preset hydrogen supply pressure can be set according to the hydrogen pressure ranges of the liquid hydrogen supply system and the gaseous hydrogen supply system. Determine whether the hydrogen supply pressure is greater than the preset hydrogen supply pressure. When the hydrogen supply pressure is greater than the preset hydrogen supply pressure, it can indicate that the hydrogen supply pressure of the hydrogen supply system is relatively high, and the hydrogen supply system is a high-pressure hydrogen supply system. At this time, control the opening of the first proportional valve, and reasonably control the opening degree of the first proportional valve according to the target pressure demand of the fuel cell stack, and control the closing of the second proportional valve and the direct-through proportional valve. When the hydrogen supply pressure is less than or equal to the preset hydrogen supply pressure, it can indicate that the hydrogen supply pressure of the hydrogen supply system is relatively low, and the hydrogen supply system is a low-pressure hydrogen supply system. At this time, control the opening of the second proportional valve, and reasonably control the opening degree of the second proportional valve according to the target pressure demand of the fuel cell stack, and control the closing of the first proportional valve and the direct-through proportional valve.

[0076] In some embodiments of the present invention, the proportional valve assembly includes a third proportional valve and a fourth proportional valve; the hydrogen supply pressure applicable to the third proportional valve is the same as the hydrogen supply pressure applicable to the fourth proportional valve; control the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure demand, including: determining whether the output pressure of the ejector can meet the target pressure demand; in response to the output pressure of the ejector not being able to meet the target pressure demand, control the opening of the hydrogen circulation pump and the direct-through proportional valve, and control the closing of the third proportional valve and the fourth proportional valve.

[0077] Specifically, when the proportional valve assembly includes a third proportional valve and a fourth proportional valve, under the high hydrogen supply pressure state, the ejector can meet the pressure requirement of the fuel cell stack. The hydrogen supply pressure applicable to the third proportional valve is the same as that applicable to the fourth proportional valve, that is, both the third proportional valve and the fourth proportional valve can be high-pressure adapted proportional valves. Compare the output pressure of the ejector with the target pressure requirement to determine whether the output pressure of the ejector can meet the target pressure requirement. If the output pressure of the ejector cannot meet the target pressure requirement, it can indicate that the ejector does not have normal ejecting ability and the fuel cell is in a high-power state. At this time, control the hydrogen circulation pump and the direct-through proportional valve to be turned on, and control the third proportional valve and the fourth proportional valve to be turned off, so that the hydrogen supply pressure at the inlet of the fuel cell stack meets the target pressure requirement, realizing the normal output in the full power range of the fuel cell. Thus, by using the direct-through proportional valve to connect the hydrogen cutoff valve and the fuel cell stack respectively, the situation where the hydrogen supply pressure of the direct-through proportional valve or the hydrogen supply pressure of the fuel cell system cannot meet the pressure requirement at the front end of the ejector can be realized, so as to make up for the lack of the power range of the fuel cell stack with high current density. It solves the defect that it is difficult to meet the flow demand of the fuel cell system in a low hydrogen supply pressure system with a single high-pressure adapted proportional valve. By adopting the parallel connection mode of the third proportional valve and the fourth proportional valve, the flow of the fuel cell system can be increased to meet the flow demand of the fuel cell system. At the same time, the direct-through proportional valve can handle the situation where it is difficult to meet the pressure requirement at the front end inlet of the ejector in a low hydrogen supply pressure system, and supply hydrogen directly to the fuel cell stack to solve the problem of the pressure requirement at the inlet of the fuel cell stack.

[0078] In some embodiments of the present invention, the above method further includes: in response to the output pressure of the ejector being able to meet the target pressure requirement, determining whether the ejector can work independently; in response to the ejector being able to work independently, controlling the hydrogen circulation pump and the direct-through proportional valve to be turned off, and controlling the third proportional valve and the fourth proportional valve to be turned on; in response to the ejector not being able to work independently, controlling the hydrogen circulation pump, the third proportional valve and the fourth proportional valve to be turned on, and controlling the direct-through proportional valve to be turned off.

[0079] Specifically, when the output pressure of the ejector can meet the target pressure requirement, it can indicate that the ejector has normal ejecting ability, and the fuel cell is in a low-power state or a medium-high power state. Then, it is determined again whether the ejector can work independently. When the ejector can work independently, it can indicate that the vehicle power demand is within the working power range of the ejector, and the fuel cell is in a medium-high power state. In this case, there is no need to use the hydrogen circulation pump as an auxiliary device to recover hydrogen. At this time, control the hydrogen circulation pump to be closed to reduce energy consumption, control the direct-through proportional valve to be closed, control the third proportional valve and the fourth proportional valve to be opened, and the opening degrees of the third proportional valve and the fourth proportional valve can be reasonably controlled according to the target pressure requirement of the fuel cell stack. When the ejector cannot work independently, it can indicate that the vehicle power demand is not within the working power range of the ejector, and the fuel cell is in a low-power state. In this case, it is necessary to use the hydrogen circulation pump as an auxiliary device to recover hydrogen. At this time, control the hydrogen circulation pump to be opened, control the third proportional valve and the fourth proportional valve to be opened, and the opening degrees of the third proportional valve and the fourth proportional valve can be reasonably controlled according to the target pressure requirement of the fuel cell stack, and control the direct-through proportional valve to be closed.

[0080] As a specific embodiment, as Figure 3 shown, the flowchart of the control method of the fuel cell system of the present invention may include the following steps:

[0081] S301, obtain the vehicle power demand and the power of the fuel cell auxiliary system of the fuel cell system.

[0082] S302, calculate the target power demand of the fuel cell stack according to the vehicle power demand and the power of the fuel cell auxiliary system.

[0083] S303, determine the target pressure demand of the intake port of the fuel cell stack according to the target power demand.

[0084] S304, determine whether the output pressure of the ejector meets the target pressure demand. If yes, execute step S306; if no, execute step S305.

[0085] S305, control the hydrogen circulation pump and the direct-through proportional valve to be opened, and control the first proportional valve and the second proportional valve to be closed.

[0086] S306, determine whether the ejector works independently. If yes, execute step S307; if no, execute step S308.

[0087] S307, control the hydrogen circulation pump to be closed.

[0088] S308, control the hydrogen circulation pump to be opened.

[0089] S309, determine whether the hydrogen supply pressure is greater than the preset hydrogen supply pressure. If yes, execute step S310; if no, execute step S311.

[0090] S310, control to open the first proportional valve, control to close the second proportional valve, and the direct-through proportional valve.

[0091] S311, control to open the second proportional valve, control to close the first proportional valve, and the direct-through proportional valve.

[0092] Thus, an adapted high-pressure adapted proportional valve and a low-pressure adapted proportional valve are adopted to select and open the appropriate adapted proportional valve according to different hydrogen supply systems, ensuring the normal power output of the fuel cell system. The direct-through proportional valve adopts direct hydrogen supply to solve the problem that it is difficult to meet the pressure requirement at the front end of the ejector under high-power conditions in a low hydrogen supply pressure system. The method of directly supplying hydrogen to the fuel cell stack is used to complete the high-power output range of the fuel cell stack.

[0093] As another specific embodiment, as Figure 4 shown, the flowchart of the control method of the fuel cell system of the present invention may include the following steps:

[0094] S401, obtain the vehicle power demand and the power of the fuel cell auxiliary system of the fuel cell system.

[0095] S402, calculate the target power demand of the fuel cell stack according to the vehicle power demand and the power of the fuel cell auxiliary system.

[0096] S403, determine the target pressure demand of the air inlet of the fuel cell stack according to the target power demand.

[0097] S404, determine whether the output pressure of the ejector meets the target pressure demand. If so, execute step S406; if not, execute step S405.

[0098] S405, control to open the hydrogen circulation pump and the direct-through proportional valve, and control to close the third proportional valve and the fourth proportional valve.

[0099] S406, determine whether the ejector works independently. If so, execute step S407; if not, execute step S408.

[0100] S407, control to close the hydrogen circulation pump and the direct-through proportional valve, and control to open the third proportional valve and the fourth proportional valve.

[0101] S408, control to open the hydrogen circulation pump, the third proportional valve and the fourth proportional valve, and control to close the direct-through proportional valve.

[0102] Therefore, a scheme of parallel connection of the same proportional valves is adopted to keep the opening degrees of the two proportional valves consistent all the time. In a low hydrogen supply pressure system, this scheme can increase the maximum flow rate of the proportional valves to meet the new hydrogen flow demand. For a low hydrogen supply pressure system, installing a direct-through proportional valve can solve the problem that the proportional valve cannot provide the pressure required at the front end of the ejector. By adopting the scheme of directly supplying hydrogen to the fuel cell stack, the high-power range of the low hydrogen supply pressure system can be broadened.

[0103] In summary, the control method of the fuel cell system according to the embodiment of the present invention includes: obtaining the hydrogen supply pressure of the hydrogen supply system and the hydrogen inlet pressure at the inlet of the fuel cell stack; controlling a direct-through proportional valve, a proportional valve assembly, a hydrogen circulation pump, and an ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement. Therefore, by controlling the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement, this method can take into account both the gaseous hydrogen supply system and various supply pressure situations such as the liquid hydrogen supply system, meet the high-power operating conditions output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0104] It should be noted that the method of the embodiment of the present invention can be executed by a single device, such as a computer or a server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In this case of a distributed scenario, one of the multiple devices can only execute one or more steps in the method of the embodiment of the present invention, and these multiple devices will interact with each other to complete the above method.

[0105] It should be noted that some embodiments of the present invention are described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be executed in a different order than in the above embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0106] Corresponding to the above embodiments, the present invention also proposes a control device for a fuel cell system.

[0107] As Figure 5 shown, the control device of the fuel cell system according to the embodiment of the present invention includes: an acquisition module 510 and a control module 520.

[0108] Among them, the acquisition module 510 is configured to acquire the hydrogen supply pressure of the hydrogen supply system and the hydrogen intake pressure of the intake port of the fuel cell stack; the control module 520 is configured to control the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen intake pressure, so that the hydrogen intake pressure of the intake port of the fuel cell stack meets the target pressure requirement.

[0109] In some embodiments of the present invention, the acquisition module 510 is further configured to acquire the vehicle power demand and the power of the fuel cell auxiliary system of the fuel cell system; calculate the target power demand of the fuel cell stack according to the vehicle power demand and the power of the fuel cell auxiliary system; determine the target pressure requirement of the intake port of the fuel cell stack according to the target power demand.

[0110] In some embodiments of the present invention, the proportional valve assembly includes a first proportional valve and a second proportional valve; the hydrogen supply pressure applicable to the first proportional valve is greater than the hydrogen supply pressure applicable to the second proportional valve; the control module 520 controls the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen intake pressure, so that the hydrogen intake pressure of the intake port of the fuel cell stack meets the target pressure requirement, and specifically is used for: determining whether the output pressure of the ejector can meet the target pressure requirement; in response to the output pressure of the ejector not being able to meet the target pressure requirement, controlling to turn on the hydrogen circulation pump and the direct-through proportional valve, and controlling to turn off the first proportional valve and the second proportional valve.

[0111] In some embodiments of the present invention, the control module 520 is further configured to, in response to the output pressure of the ejector being able to meet the target pressure requirement, determine whether the ejector can work independently; in response to the ejector being able to work independently, control to turn off the hydrogen circulation pump; in response to the ejector not being able to work independently, control to turn on the hydrogen circulation pump.

[0112] In some embodiments of the present invention, the hydrogen supply pressure is compared with a preset hydrogen supply pressure; in response to the hydrogen supply pressure being greater than the preset hydrogen supply pressure, the control module 520 is further configured to control to turn on the first proportional valve, control to turn off the second proportional valve and the direct-through proportional valve; in response to the hydrogen supply pressure being less than or equal to the preset hydrogen supply pressure, control to turn on the second proportional valve, control to turn off the first proportional valve and the direct-through proportional valve.

[0113] In some embodiments of the present invention, the proportional valve assembly includes a third proportional valve and a fourth proportional valve; the hydrogen supply pressure applicable to the third proportional valve is the same as the hydrogen supply pressure applicable to the fourth proportional valve; the control module 520 controls the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the air inlet of the fuel cell stack meets the target pressure requirement. Specifically, it is configured to: determine whether the output pressure of the ejector can meet the target pressure requirement; in response to the output pressure of the ejector not being able to meet the target pressure requirement, control to turn on the hydrogen circulation pump and the direct-through proportional valve, and control to turn off the third proportional valve and the fourth proportional valve.

[0114] In some embodiments of the present invention, in response to the output pressure of the ejector being able to meet the target pressure requirement, determine whether the ejector can operate independently; in response to the ejector being able to operate independently, the control module 520 is further configured to control to turn off the hydrogen circulation pump and the direct-through proportional valve, and control to turn on the third proportional valve and the fourth proportional valve; in response to the ejector not being able to operate independently, control to turn on the hydrogen circulation pump, the third proportional valve, and the fourth proportional valve, and control to turn off the direct-through proportional valve.

[0115] It should be noted that for the details not disclosed in the control device of the fuel cell system in the embodiments of the present invention, please refer to the details disclosed in the control method of the fuel cell system in the embodiments of the present invention, and will not be elaborated here.

[0116] In summary, the control device of the fuel cell system according to the embodiments of the present invention includes: an acquisition module configured to acquire the hydrogen supply pressure of the hydrogen supply system and the hydrogen inlet pressure at the air inlet of the fuel cell stack; a control module configured to control the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the air inlet of the fuel cell stack meets the target pressure requirement. Thus, by controlling the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the air inlet of the fuel cell stack meets the target pressure requirement, it can take into account both the gaseous hydrogen supply system and various supply pressure situations such as the liquid hydrogen supply system, meet the high-power operating conditions output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0117] For the convenience of description, the above system is described by dividing it into various modules according to functions. Of course, when implementing the present invention, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0118] The system of the above embodiment is used to implement the corresponding method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0119] Corresponding to the above embodiments, the present invention also provides an electronic device.

[0120] Referring to Figure 6 , which is a block diagram of an electronic device according to some embodiments of the present invention, showing a more specific schematic diagram of the hardware structure of the electronic device provided in this embodiment. The electronic device may include: a processor 610, a memory 620, an input / output interface 630, a communication interface 640, and a bus 650. Among them, the processor 610, the memory 620, the input / output interface 630, and the communication interface 640 are communicatively connected to each other inside the electronic device through the bus 650.

[0121] The processor 610 may be implemented in a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0122] The memory 620 may be implemented in the form of a ROM (Read Only Memory), a RAM (Random Access Memory), a static storage device, a dynamic storage device, etc. The memory 620 may store an operating system and other application programs. When implementing the technical solutions provided in the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 620 and are called and executed by the processor 610.

[0123] The input / output interface 630 is used to connect to an input / output module to implement information input and output. The input / output module may be configured as a component in the electronic device (not shown in the figure) or externally connected to the electronic device to provide corresponding functions. Among them, the input electronic device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output electronic device may include a display, a speaker, a vibrator, an indicator light, etc.

[0124] The communication interface 640 is used to connect to a communication module (not shown in the figure) to implement communication interaction between this electronic device and other electronic devices. Among them, the communication module may communicate through a wired method (such as USB, network cable, etc.) or through a wireless method (such as a mobile network, WIFI, Bluetooth, etc.).

[0125] The bus 650 includes a path for transmitting information between various components of the electronic device (such as the processor 610, the memory 620, the input / output interface 630, and the communication interface 640).

[0126] It should be noted that although the above electronic device only shows the processor 610, the memory 620, the input / output interface 630, the communication interface 640, and the bus 650, in the specific implementation process, the electronic device may also include other components necessary for normal operation. In addition, those skilled in the art can understand that the above electronic device may also only include the components necessary to implement the solution of the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0127] The electronic device of the above embodiment is used to implement the corresponding method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0128] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present invention also provides a computer-readable storage medium storing computer instructions for causing a computer to execute the method of any of the above embodiments.

[0129] The above computer-readable storage medium may be any available medium or data storage device accessible by a computer, including but not limited to magnetic memories (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical memories (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor memories (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NANDFLASH), solid-state drives (SSD)).

[0130] The computer instructions stored in the storage medium of the above embodiment are used to cause a computer to execute the method of any of the above exemplary method embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0131] Based on the same inventive concept, as Figure 7 shown, corresponding to the method of any of the above embodiments, the present invention also provides a vehicle 700 including the above fuel cell system 100.

[0132] According to the vehicle of the embodiment of the present invention, through the above fuel cell system, by controlling the direct-through proportional valve, the proportional valve assembly, the hydrogen circulation pump, and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement, it can take into account both the gaseous hydrogen supply system and the liquid hydrogen supply system and other situations of supply pressures, meet the high-power working condition output requirements of the fuel cell system, meet the operating conditions of the fuel cell stack, and ensure the stable and efficient operation of the fuel cell.

[0133] In addition, although the operations of the method of the present invention are described in a specific order in the drawings, this is not a requirement or implication that these operations must be performed in that specific order, or that all of the shown operations must be performed to achieve the desired result. On the contrary, the order of the steps depicted in the flowcharts can be changed. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.

[0134] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), and the like.

[0135] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second", and similar terms used in the embodiments of the present invention do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0136] Although the spirit and principles of the present invention have been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed, and the division of each aspect does not mean that the features in these aspects cannot be combined for benefit. This division is only for convenience of expression. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the appended claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A control method for a fuel cell system, characterized in that: include: Obtaining the hydrogen supply pressure of the hydrogen supply system and the hydrogen inlet pressure of the fuel cell stack; The through proportional valve, the proportional valve assembly, the hydrogen circulation pump and the ejector are controlled according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the air inlet of the fuel cell stack meets the target pressure requirement.

2. The control method of the fuel cell system according to claim 1, characterized in that: The method further comprises: Obtaining the power demand of the entire vehicle and the power of the fuel cell auxiliary system of the fuel cell system; Calculating the target power requirement of the fuel cell stack according to the vehicle power requirement and the fuel cell auxiliary system power; A target pressure requirement of an air inlet of the fuel cell stack is determined according to the target power requirement.

3. The control method of the fuel cell system according to claim 2, characterized in that: The proportional valve assembly includes a first proportional valve and a second proportional valve; the hydrogen supply pressure applicable to the first proportional valve is greater than the hydrogen supply pressure applicable to the second proportional valve; The controlling of the through proportional valve, the proportional valve assembly, the hydrogen circulation pump and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement includes: Determining whether the output pressure of the ejector can meet the target pressure requirement; In response to the output pressure of the ejector failing to meet the target pressure requirement, the hydrogen circulation pump and the through proportional valve are controlled to be opened, and the first proportional valve and the second proportional valve are controlled to be closed.

4. The control method of the fuel cell system according to claim 3, characterized in that: The method further comprises: In response to the output pressure of the ejector being able to meet the target pressure requirement, determining whether the ejector can work independently; In response to the ejector being able to work independently, controlling to shut down the hydrogen circulation pump; In response to the ejector being unable to work independently, the hydrogen circulation pump is controlled to be turned on.

5. The control method of the fuel cell system according to claim 4, characterized in that: The method further comprises: comparing the hydrogen supply pressure with a preset hydrogen supply pressure; In response to the hydrogen supply pressure being greater than the preset hydrogen supply pressure, controlling to open the first proportional valve, and controlling to close the second proportional valve and the through proportional valve; In response to the hydrogen supply pressure being less than or equal to the preset hydrogen supply pressure, the second proportional valve is controlled to be opened, and the first proportional valve and the through proportional valve are controlled to be closed.

6. The control method of the fuel cell system according to claim 2, characterized in that: The proportional valve assembly includes a third proportional valve and a fourth proportional valve; the hydrogen supply pressure applicable to the third proportional valve is the same as the hydrogen supply pressure applicable to the fourth proportional valve; The controlling of the through proportional valve, the proportional valve assembly, the hydrogen circulation pump and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure so that the hydrogen inlet pressure at the inlet of the fuel cell stack meets the target pressure requirement includes: Determining whether the output pressure of the ejector can meet the target pressure requirement; In response to the output pressure of the ejector failing to meet the target pressure requirement, the hydrogen circulation pump and the through proportional valve are controlled to be opened, and the third proportional valve and the fourth proportional valve are controlled to be closed.

7. The control method of the fuel cell system according to claim 6, characterized in that: The method further comprises: In response to the output pressure of the ejector being able to meet the target pressure requirement, determining whether the ejector can work independently; In response to the ejector being able to work independently, controlling to close the hydrogen circulation pump and the straight-through proportional valve, and controlling to open the third proportional valve and the fourth proportional valve; In response to the ejector being unable to work independently, the hydrogen circulation pump, the third proportional valve and the fourth proportional valve are controlled to be opened, and the through proportional valve is controlled to be closed.

8. A control device for a fuel cell system, characterized in that: include: An acquisition module is configured to acquire the hydrogen supply pressure of the hydrogen supply system and the hydrogen inlet pressure of the air inlet of the fuel cell stack; The control module is configured to control the straight-through proportional valve, the proportional valve assembly, the hydrogen circulation pump and the ejector according to the hydrogen supply pressure and the hydrogen inlet pressure, so that the hydrogen inlet pressure at the air inlet of the fuel cell stack meets the target pressure requirement.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the control method of the fuel cell system according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to enable the computer to implement the control method of the fuel cell system according to any one of claims 1 to 7.

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