Fuel cell system operation mode switching control method, device, equipment and medium

Abstract

The invention discloses a fuel cell system operation mode switching control method, device and equipment and a medium, and is applied to the technical field of fuel cells, and the method comprises the following steps: when it is determined that a fuel cell system meets a hot standby mode switching condition, controlling the fuel cell system to be switched to a hot standby mode for operation; in the process that the fuel cell system operates in the hot standby mode, the cathode system is controlled to intermittently provide air with first pressure for the electric pile and the anode system is controlled to intermittently provide hydrogen with second pressure for the electric pile, so that the anode system of the electric pile does not have a hydrogen-air interface, the hydrogen-air interface does not exist in the anode system of the electric pile, and the open-circuit voltage of the electric pile is maintained in the target voltage range, so that the output voltage difference of the fuel cell system in a hot standby mode and a normal power generation mode can be reduced by maintaining the open-circuit voltage of the fuel cell system at a relatively high voltage value; therefore, the response performance of the fuel cell system during switching between the hot standby mode and the normal power generation mode can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of fuel cells, and in particular to a method, device, equipment and medium for controlling the operation mode switching of a fuel cell system. Background Art

[0002] In a hydrogen fuel cell vehicle, when the vehicle is in a parked state, the vehicle does not require the fuel cell and the power battery to provide driving force. At this time, the fuel cell or the power battery only needs to supply power to the vehicle accessories. The fuel cell may switch between the hot standby mode and the normal power generation mode. Currently, the response performance of the fuel cell when switching between the hot standby mode and the normal power generation mode during the parked state of the vehicle has decreased. Summary of the Invention

[0003] The present application provides a method, device, equipment and medium for controlling the operation mode switching of a fuel cell system, so as to solve the problem of poor response performance of the fuel cell in the prior art when switching between the hot standby mode and the normal power generation mode. Specifically, the technical solutions provided by the present application are as follows:

[0004] On the one hand, the present application provides a method for controlling the operation mode switching of a fuel cell system, including:

[0005] During the process that the whole vehicle of the fuel cell vehicle is in a parked state, when it is determined that the fuel cell system meets the hot standby mode switching condition, control the fuel cell system to switch to the hot standby mode for operation;

[0006] During the process that the fuel cell system operates in the hot standby mode, control the cathode system to intermittently supply air with a first pressure to the stack and control the anode system to intermittently supply hydrogen with a second pressure to the stack, so that there is no hydrogen-air interface in the anode system of the stack. The absence of a hydrogen-air interface in the anode system of the stack includes maintaining the open-circuit voltage of the stack within a target voltage range; wherein, the first pressure and the second pressure satisfy the calibrated pressure difference corresponding to the fuel cell system; the voltage difference between the target voltage range and the output voltage range of the normal power generation mode is not higher than the voltage difference threshold.

[0007] In a possible implementation manner, the method for controlling the operation mode switching of a fuel cell system provided by the present application further includes:

[0008] When it is determined that the fuel cell system meets the normal power generation mode switching condition, control the fuel cell system to switch to the normal power generation mode for operation;

[0009] During the process that the fuel cell system operates in the normal power generation mode, control the fuel cell system to supply power to the vehicle accessories and charge the power battery.

[0010] In a possible implementation manner, determining that the fuel cell system meets the normal power generation mode switching condition includes:

[0011] When it is determined that the remaining power (State Of Charge, SOC) of the power battery is not higher than the first power threshold, it is determined that the fuel cell system meets the normal power generation mode switching condition.

[0012] In a possible implementation manner, determining that the fuel cell system meets the hot standby mode switching condition includes:

[0013] When it is determined that the remaining power of the power battery is not lower than the second power threshold, it is determined that the fuel cell system meets the hot standby mode switching condition; wherein, the second power threshold is greater than the first power threshold.

[0014] In a possible implementation manner, controlling the cathode system to intermittently supply air with a first pressure to the stack includes:

[0015] Controlling the air compressor in the cathode system to operate at a first opening frequency and a first rotational speed, so that the cathode system intermittently supplies air with a first pressure to the stack.

[0016] In a possible implementation manner, controlling the anode system to intermittently supply hydrogen with a second pressure to the stack includes:

[0017] Controlling the hydrogen injector in the anode system to operate at a second opening frequency and controlling the hydrogen circulation pump in the anode system to operate at a second rotational speed, so that the anode system intermittently supplies hydrogen with a second pressure to the stack.

[0018] In a possible implementation manner, controlling the hydrogen injector in the anode system to operate at a second opening frequency includes:

[0019] Determining the target nozzle of the hydrogen injector based on the second pressure;

[0020] Controlling the hydrogen injector to open the target nozzle at the second opening frequency to supply hydrogen to the stack.

[0021] On the other hand, the present application also provides a fuel cell system operation mode switching control device, including:

[0022] A mode switching unit, configured to control the fuel cell system to switch to the hot standby mode during the process when the whole vehicle of the fuel cell vehicle is in the parked state and it is determined that the fuel cell system meets the hot standby mode switching condition;

[0023] A hot standby control unit is used to control the cathode system to intermittently supply air at a first pressure to the stack and control the anode system to intermittently supply hydrogen at a second pressure to the stack during the operation of the fuel cell system in the hot standby mode, so that there is no hydrogen-air interface in the anode system of the stack. The absence of a hydrogen-air interface in the anode system of the stack includes maintaining the open-circuit voltage of the stack within a target voltage range. Wherein, the first pressure and the second pressure satisfy the calibrated pressure difference corresponding to the fuel cell system; the voltage difference between the target voltage range and the output voltage range in the normal power generation mode is not higher than the voltage difference threshold.

[0024] On the other hand, the present application also provides a fuel cell control device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the above-mentioned fuel cell system operation mode switching control method is implemented.

[0025] On the other hand, the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, the above-mentioned fuel cell system operation mode switching control method is implemented.

[0026] The beneficial effects of the present application are as follows:

[0027] By controlling the cathode system to intermittently supply air at a first pressure to the stack and controlling the anode system to intermittently supply hydrogen at a second pressure to the stack, the present application can make there be no hydrogen-air interface in the anode system of the stack. The absence of a hydrogen-air interface in the anode system of the stack includes maintaining the open-circuit voltage of the stack within a relatively high target voltage range. For example, when the stack has 300 single cells, maintaining the open-circuit voltage of a single cell at 0.7 - 0.78V can maintain the open-circuit voltage of the fuel cell at 210V - 234V, while the output voltage at a certain current density in the normal power generation mode of the fuel cell is 260V. Therefore, without increasing the vehicle cost, without affecting the spatial layout of components, and without extending the development cycle of the fuel cell system, the output voltage difference between the hot standby mode and the normal power generation mode of the fuel cell system can be reduced, and further, the response performance of the fuel cell system during the switching between the hot standby mode and the normal power generation mode can be improved, avoiding a large increase or decrease in the output voltage of the fuel cell system, and improving the service life of the proton exchange membrane of the fuel cell system.

[0028] Other features and advantages of the present application will be described in the subsequent specification, and in part, can be made obvious from the specification, or understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the written specification, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0030] Figure 1 It is a schematic structural diagram of the fuel cell system in the embodiment of the present application;

[0031] Figure 2 It is a schematic general flow diagram of the method for controlling the operation mode switching of the fuel cell system in the embodiment of the present application;

[0032] Figure 3 It is a schematic specific flow diagram of the method for controlling the operation mode switching of the fuel cell system in the embodiment of the present application;

[0033] Figure 4 It is a schematic functional structural diagram of the device for controlling the operation mode switching of the fuel cell system in the embodiment of the present application;

[0034] Figure 5 It is a schematic hardware structural diagram of the fuel cell control device in the embodiment of the present application. Detailed implementation manners

[0035] In order to make the purpose, technical solutions and beneficial effects of the present application clearer and more understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0036] To facilitate better understanding of the present application by those skilled in the art, the technical terms involved in the present application will be briefly introduced below.

[0037] A fuel cell system is a power generation device that converts the chemical energy in fuel (such as hydrogen) and oxidant (such as air) into electrical energy. Refer to Figure 1 As shown, the fuel cell system at least includes a stack, an anode system for supplying hydrogen to the stack, a cathode system for supplying oxygen-containing air to the stack, and a cooling system for cooling the stack; among them, the anode system at least includes a hydrogen injector, a hydrogen circulation pump, a gas-liquid separator and a nitrogen and water discharge valve; the cathode system at least includes an air filter, an air compressor, an intercooler and an air humidifier; the cooling system at least includes a radiator assembly, a heater, a water pump, a bypass valve, etc.

[0038] It should be noted that the "first", "second", etc. mentioned in this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, so that the embodiments described here can be implemented in an order other than that illustrated or described here. In addition, the "and / or" mentioned in this application describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0039] After introducing the technical terms involved in this application, the application scenarios and design concepts of this application will be briefly introduced next.

[0040] When the fuel cell vehicle is in a parked state, the vehicle does not require the fuel cell system and the power battery to provide driving force. At this time, either the fuel cell system or the power battery only needs to supply power to the vehicle accessories. When the fuel cell system supplies power to the vehicle accessories, the fuel cell system enters the normal power generation mode. When the power battery supplies power to the vehicle accessories, the fuel cell system enters the hot standby mode. When the fuel cell system enters the hot standby mode, since the vehicle is parked for a long time, the air in the cathode system of the fuel cell system will penetrate into the anode system to form a hydrogen-air interface, resulting in a high potential in the cathode system. For example, the single-cell voltage even exceeds 1V, which further causes the corrosion of the carbon serving as the catalyst carrier and affects the service life of the fuel cell system. Therefore, when the fuel cell system enters the hot standby mode, air supply to the fuel cell system is usually stopped, and the high voltage output by the fuel cell is reduced to about 10V through a pressure relief method. For example, when the fuel cell stack has 300 single cells, the voltage of a single cell (abbreviated as single-cell voltage) is reduced to about 0.03, and the output voltage of the fuel cell is reduced to about 9V. However, this method of reducing the high voltage output by the fuel cell to about 10V will cause a decrease in the response performance of the fuel cell system when switching between the hot standby mode and the normal power generation mode due to the low output voltage of the fuel cell.

[0041] To this end, during the operation of the fuel cell system in the hot standby mode, the present application controls the cathode system to intermittently supply air at a first pressure to the stack and controls the anode system to intermittently supply hydrogen at a second pressure to the stack, so that there is no hydrogen-air interface in the anode system of the stack. The absence of a hydrogen-air interface in the anode system of the stack includes maintaining the open-circuit voltage of the stack within a target voltage range. Since the number of single cells in each fuel cell is inconsistent, the present application can maintain the open-circuit voltage of the stack within the target voltage range by maintaining the open-circuit voltage of a single cell within a relatively high set range. For example, when the stack has 300 single cells, the single-cell voltage is maintained at 0.7 - 0.78V, and the open-circuit voltage of the fuel cell is maintained at 210V - 234V. When the fuel cell is in the normal power generation mode, the output voltage at a certain current density is 260V. Thus, without increasing the vehicle cost, without affecting the spatial arrangement of components, and without extending the development cycle of the fuel cell system, the output voltage difference between the hot standby mode and the normal power generation mode of the fuel cell system can be reduced. Subsequently, the response performance of the fuel cell system during the switching between the hot standby mode and the normal power generation mode can be improved, avoiding a large increase or decrease in the output voltage of the fuel cell system, and improving the service life of the proton exchange membrane of the fuel cell system.

[0042] After introducing the application scenario and design concept of the present application, the technical solutions provided by the present application will be described in detail below.

[0043] The embodiment of the present application provides a method for controlling the switching of the operating mode of a fuel cell system, which can be applied to a fuel cell control device in a fuel cell system, such as a fuel cell controller (Fuelcell Control Unit, FCU) in a fuel cell system. Specifically, refer to Figure 2 As shown, the general flow of the method for controlling the switching of the operating mode of the fuel cell system provided by the embodiment of the present application is as follows:

[0044] Step 200: During the process that the fuel cell vehicle is in the parked state, when it is determined that the fuel cell system meets the hot standby mode switching condition, control the fuel cell system to switch to the hot standby mode for operation.

[0045] In the embodiment of the present application, if the fuel cell vehicle remains parked for a long time, during the process of the fuel cell vehicle being parked, the fuel cell vehicle does not require the fuel cell system and the power battery to provide driving force. At this time, the fuel cell system or the power battery only needs to supply power to the vehicle accessories. Specifically, the fuel cell control device determines whether the fuel cell system needs to output power according to the remaining power of the power battery. Among them, when it is determined that the remaining power of the power battery is not higher than the first power threshold (for example, the first power threshold is 10%), it is determined that the fuel cell system needs to output power, that is, it is determined that the fuel cell system meets the normal power generation mode switching condition. In this case, the fuel cell system can be controlled to switch to the normal power generation mode and operate, and during the process of the fuel cell system operating in the normal power generation mode, the fuel cell system is controlled to supply power to the vehicle accessories and charge the power battery. When it is determined that the remaining power of the power battery is not lower than the second power threshold (the second power threshold is greater than the first power threshold, for example, the second power threshold is 90%), it is determined that the fuel cell system does not need to output power. At this time, the power battery supplies power to the vehicle accessories, that is, it is determined that the fuel cell system meets the hot standby mode switching condition. In this case, the fuel cell system can be controlled to switch to the hot standby mode and operate.

[0046] Step 201: During the process of the fuel cell system operating in the hot standby mode, control the cathode system to intermittently supply air with a first pressure to the fuel cell stack and control the anode system to intermittently supply hydrogen with a second pressure to the fuel cell stack, so that there is no hydrogen-air interface in the anode system of the fuel cell stack. The anode system of the fuel cell stack having no hydrogen-air interface includes maintaining the open-circuit voltage of the fuel cell stack within a target voltage range. Among them, the first pressure and the second pressure satisfy the calibrated pressure difference corresponding to the fuel cell system. The voltage difference between the target voltage range and the output voltage range of the normal power generation mode is not higher than the voltage difference threshold.

[0047] In the embodiment of the present application, during the operation of the fuel cell system in the hot standby mode, the fuel cell control device controls the cathode system to intermittently supply air at a first pressure to the stack and controls the anode system to intermittently supply hydrogen at a second pressure to the stack, so that the open circuit voltage of the stack is maintained within a relatively high target voltage range. This can ensure that the voltage difference between the open circuit voltage of the fuel cell system during hot standby mode operation and the output voltage during normal power generation mode operation does not exceed the voltage difference threshold. Thus, the output voltage difference between the hot standby mode and the normal power generation mode of the fuel cell system can be effectively reduced, and further, the response performance of the fuel cell system during the switching between the hot standby mode and the normal power generation mode can be effectively improved. Among them, different fuel cell systems correspond to different target voltage ranges, which can be specifically determined according to the number of single cells included in the fuel cell system. In the embodiment of the present application, the fuel cell control device maintains the open circuit voltage of the stack within a relatively high target voltage range (e.g., 210V - 234V) by maintaining the single cell voltage of each single cell in the stack within a relatively high set range (e.g., 0.7 - 0.78V).

[0048] In specific implementation, in order to maintain the open circuit voltage of the stack within the target voltage range during the operation of the fuel cell system in the hot standby mode, on the one hand, the hydrogen pressure entering the stack when the open circuit voltage of the stack is maintained within the target voltage range can be pre-calibrated, that is, the second pressure when the open circuit voltage of the stack is maintained within the target voltage range can be pre-calibrated. On the other hand, based on the calibrated second pressure, the air pressure entering the stack can be calculated using the calibrated pressure difference between the hydrogen pressure entering the stack and the air pressure entering the stack corresponding to the fuel cell system, that is, the first pressure can be calculated. Further, based on the first pressure and the second pressure, the operating parameters of each component in the fuel cell system when the open circuit voltage of the stack is maintained within the target voltage range can be pre-calibrated. For example, the first opening frequency and the first rotation speed of the air compressor in the cathode system corresponding to the first pressure are calibrated, and the second opening frequency of the hydrogen injector and the second rotation speed of the hydrogen circulation pump in the anode system corresponding to the second pressure are calibrated.

[0049] In this way, during the operation of the fuel cell system in the hot standby mode, the fuel cell control device can control the air compressor in the cathode system to operate at the first opening frequency and the first rotational speed, so that the cathode system intermittently supplies air with the first pressure to the fuel cell stack. For example, the intermittent rotational speed of the air compressor can be achieved by adding a counter to the control circuit of the air compressor. At the same time, control the hydrogen injector in the anode system to operate at the second opening frequency and control the hydrogen circulation pump in the anode system to operate at the second rotational speed, so that the anode system intermittently supplies hydrogen with the second pressure to the fuel cell stack. For example, the intermittent opening of the hydrogen injector and the rotational speed control of the hydrogen circulation pump are achieved by the pulse control signals respectively sent by the fuel cell controller according to the hydrogen concentration measured by the hydrogen concentration sensor. Thus, the open-circuit voltage of the fuel cell stack can be maintained within the target voltage range. Specifically, when the fuel cell control device controls the hydrogen injector in the anode system to operate at the second opening frequency, it can determine the target nozzle of the hydrogen injector based on the second pressure, and control the hydrogen injector to open the target nozzle to supply hydrogen to the fuel cell stack at the second opening frequency, so as to cooperate with the hydrogen circulation pump to achieve intermittent supply of hydrogen with the second pressure to the fuel cell stack.

[0050] The following further elaborates on the fuel cell system operation mode switching control method provided by the embodiments of the present application. Refer to Figure 3 As shown, the specific process of the fuel cell system operation mode switching control method provided by the embodiments of the present application is as follows:

[0051] Step 300: The fuel cell control device determines that the duration for which the fuel cell vehicle is in the parked state is not less than the duration threshold.

[0052] Step 301: During the process when the fuel cell vehicle is in the parked state, the fuel cell control device determines whether the remaining power of the power battery is not higher than the first power threshold (for example, 10%); if so, execute Step 302; if not, execute Step 305.

[0053] Step 302: The fuel cell control device controls the fuel cell system to switch to the normal power generation mode for operation.

[0054] Step 303: During the process when the fuel cell system is operating in the normal power generation mode, the fuel cell control device controls the fuel cell system to supply power to the vehicle accessories and charge the power battery, and further execute Step 304.

[0055] Step 304: The fuel cell control device determines whether the remaining power of the power battery is not lower than the second power threshold (for example, 90%); if so, execute Step 305; if not, return to Step 303.

[0056] Step 305: The fuel cell control device controls the fuel cell system to switch to the hot standby mode; at this time, the power battery supplies power to the vehicle accessories.

[0057] Step 306: During the process of the fuel cell system operating in the hot standby mode, the fuel cell control device controls the air compressor in the cathode system to operate at the first opening frequency and the first rotational speed, so that the cathode system intermittently supplies air with the first pressure to the stack; at the same time, controls the hydrogen injector in the anode system to open the target nozzle to inject hydrogen at the second opening frequency and controls the hydrogen circulation pump in the anode system to operate at the second rotational speed, so that the anode system intermittently supplies hydrogen with the second pressure to the stack, so that there is no hydrogen-air interface in the anode system of the stack. The anode system of the stack having no hydrogen-air interface includes maintaining the open-circuit voltage of the stack within the target voltage range, and further returning to Step 301.

[0058] Based on the above embodiments, the embodiments of the present application further provide a control device for switching the operating mode of a fuel cell system. Refer to Figure 4 As shown, the control device 400 for switching the operating mode of the fuel cell system provided by the embodiments of the present application at least includes:

[0059] The hot standby switching unit 401 is configured to control the fuel cell system to switch to the hot standby mode during the process of the fuel cell vehicle being in the parked state when it is determined that the fuel cell system meets the hot standby mode switching condition;

[0060] The hot standby control unit 402 is configured to control the cathode system to intermittently supply air with the first pressure to the stack and control the anode system to intermittently supply hydrogen with the second pressure to the stack during the process of the fuel cell system operating in the hot standby mode, so that there is no hydrogen-air interface in the anode system of the stack. The anode system of the stack having no hydrogen-air interface includes maintaining the open-circuit voltage of the stack within the target voltage range; wherein, the first pressure and the second pressure satisfy the calibrated pressure difference corresponding to the fuel cell system; the voltage difference between the target voltage range and the output voltage range of the normal power generation mode is not higher than the voltage difference threshold.

[0061] In a possible implementation manner, the control device 400 for switching the operating mode of the fuel cell system provided by the embodiments of the present application further includes:

[0062] The power generation switching unit 403 is configured to control the fuel cell system to switch to the normal power generation mode when it is determined that the fuel cell system meets the normal power generation mode switching condition;

[0063] The power generation control unit 404 is configured to control the fuel cell system to supply power to the vehicle accessories and charge the power battery during the process of the fuel cell system operating in the normal power generation mode.

[0064] In a possible implementation, the power generation switching unit 403 is specifically configured to determine that the fuel cell system meets the normal power generation mode switching condition when the remaining power of the power battery is not higher than the first power threshold.

[0065] In a possible implementation, the hot standby switching unit 401 is specifically configured to determine that the fuel cell system meets the hot standby mode switching condition when the remaining power of the power battery is not lower than the second power threshold; wherein, the second power threshold is greater than the first power threshold.

[0066] In a possible implementation, the hot standby control unit 402 is specifically configured to control the air compressor in the cathode system to operate at a first opening frequency and a first rotational speed, so that the cathode system intermittently supplies air with a first pressure to the stack.

[0067] In a possible implementation, the hot standby control unit 402 is specifically configured to control the hydrogen injector in the anode system to operate at a second opening frequency and control the hydrogen circulation pump in the anode system to operate at a second rotational speed, so that the anode system intermittently supplies hydrogen with a second pressure to the stack.

[0068] In a possible implementation, the hot standby control unit 402 is specifically configured to determine the target nozzle of the hydrogen injector based on the second pressure; control the hydrogen injector to open the target nozzle at the second opening frequency to supply hydrogen to the stack.

[0069] It should be noted that the principle of the fuel cell system operation mode switching control device 400 provided in the embodiments of the present application to solve the technical problems is similar to the fuel cell system operation mode switching control method provided in the embodiments of the present application. Therefore, for the implementation of the fuel cell system operation mode switching control device 400 provided in the embodiments of the present application, reference can be made to the implementation of the fuel cell system operation mode switching control method provided in the embodiments of the present application, and the repeated parts will not be described again.

[0070] After introducing the fuel cell system operation mode switching control method and device provided in the embodiments of the present application, next, a brief introduction to the fuel cell control device provided in the embodiments of the present application will be given.

[0071] The fuel cell control device provided in the embodiments of the present application may be, but is not limited to, an FCU, etc. Specifically, refer to Figure 5 As shown, the fuel cell control device 500 provided in the embodiments of the present application at least includes a processor 501, a memory 502, and a computer program stored on the memory 502 and executable on the processor 501. When the processor 501 executes the computer program, it implements the above-mentioned fuel cell system operation mode switching control method provided in the embodiments of the present application.

[0072] The fuel cell control device 500 provided by the embodiments of the present application may further include a bus 503 connecting different components (including the processor 501 and the memory 502). Among them, the bus 503 represents one or more of several types of bus structures, including memory buses, peripheral buses, local area buses, etc.

[0073] The memory 502 may include a readable medium in the form of volatile memory, such as a random access memory (RAM) 5021 and / or a cache memory 5022, and may further include a read-only memory (ROM) 5023. The memory 502 may also include a program tool 5025 having a set (at least one) of program modules 5024. The program modules 5024 include, but are not limited to, an operating subsystem, one or more application programs, other program modules, and program data. Each or some combination of these examples may include the implementation of a network environment.

[0074] The processor 501 may be a processing element or a collective term for multiple processing elements. For example, the processor 501 may be a microcontroller unit (MCU), or a central processing unit (CPU), or one or more integrated circuits configured to implement the above-mentioned fuel cell system operation mode switching control method provided by the embodiments of the present application. Specifically, the processor 501 may be a general-purpose processor, including but not limited to a CPU, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0075] The fuel cell control device 500 may also communicate with one or more devices that enable a user to interact with the fuel cell control device 500 (such as a mobile phone, a computer, etc.), and / or, with devices that enable the fuel cell control device 500 to communicate with one or more other fuel cell control devices (such as a router, a modem, etc.), and other various external devices 504. Such communication may be carried out through an input / output (I / O) interface 505. And, the fuel cell control device 500 may also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 506. As Figure 5As shown, the network adapter 506 communicates with other modules of the fuel cell control device 500 via the bus 503. It should be understood that although Figure 5 not shown in Figure 5 , other hardware and / or software modules can be used in conjunction with the fuel cell control device 500, including but not limited to microcode, device drivers, redundant processors, external disk drive arrays, redundant arrays of independent disks (RAID) subsystems, tape drives, and data backup storage subsystems, etc.

[0076] It should be noted that Figure 5 the fuel cell control device 500 shown is merely an example and should not impose any limitations on the functions and scope of use of the embodiments of the present application.

[0077] Based on the above embodiments, the embodiments of the present application also provide a fuel cell system, which at least includes a stack, an anode system for supplying hydrogen to the stack, a cathode system for supplying air to the stack, a cooling system for cooling the stack, and the above fuel cell control device provided by the embodiments of the present application.

[0078] In addition, the embodiments of the present application also provide a fuel cell vehicle, which at least includes a vehicle body, a chassis frame, wheels, a vehicle control system, and a power system; wherein, the power system at least includes an electric motor, a power battery, and the above fuel cell system provided by the embodiments of the present application.

[0079] Furthermore, the embodiments of the present application also provide a computer-readable storage medium, which stores computer instructions that, when executed by a processor, implement the fuel cell system operation mode switching control method provided by the embodiments of the present application. Specifically, the computer instructions can be built-in or installed in the processor, so that the processor can implement the above fuel cell system operation mode switching control method provided by the embodiments of the present application by executing the built-in or installed computer instructions.

[0080] Moreover, the fuel cell system operation mode switching control method provided by the embodiments of the present application can also be implemented as a program product, which includes program code that, when executed by a processor, implements the above fuel cell system operation mode switching control method provided by the embodiments of the present application.

[0081] The program product provided by the embodiments of the present application may adopt any combination of one or more readable media. Among them, the readable media may be a readable signal medium or a readable storage medium, and the readable storage medium may be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. Specifically, more specific examples (non-exhaustive list) of the readable storage medium include an electrical connection with one or more wires, a portable disk, a hard disk, RAM, ROM, an erasable programmable read-only memory (EPROM), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0082] The program product provided by the embodiments of the present application may adopt a CD-ROM and include program code, and may also run on a fuel cell control device such as an FCU. However, the program product provided by the embodiments of the present application is not limited thereto. In the embodiments of the present application, the readable storage medium may be any tangible medium that contains or stores a program, and the program may be used by or in combination with an instruction execution system, apparatus, or device.

[0083] It should be noted that although several units or subunits of the device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of the two or more units described above may be embodied in one unit. Conversely, the features and functions of one unit described above may be further divided and embodied by multiple units.

[0084] In addition, although the operations of the method of the present application are described in a specific order in the drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, some 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.

[0085] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0086] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. A method for controlling the switching of operating modes of a fuel cell system, characterized in that, Including: During the process that the fuel cell vehicle is in a parked state, when it is determined that the fuel cell system meets the conditions for switching to the hot standby mode, controlling the fuel cell system to switch to the hot standby mode for operation; During the process that the fuel cell system operates in the hot standby mode, controlling the cathode system to intermittently supply air with a first pressure to the stack and controlling the anode system to intermittently supply hydrogen with a second pressure to the stack, so that there is no hydrogen-air interface in the anode system of the stack. The fact that there is no hydrogen-air interface in the anode system of the stack includes maintaining the open-circuit voltage of the stack within a target voltage range; wherein, the first pressure and the second pressure satisfy the calibrated pressure difference corresponding to the fuel cell system; the voltage difference between the target voltage range and the output voltage range in the normal power generation mode is not higher than the voltage difference threshold.

2. The method for controlling the operation mode switching of the fuel cell system according to claim 1, wherein Also including: When it is determined that the fuel cell system meets the conditions for switching to the normal power generation mode, controlling the fuel cell system to switch to the normal power generation mode for operation; During the process that the fuel cell system operates in the normal power generation mode, controlling the fuel cell system to supply power to vehicle accessories and charge the power battery.

3. The fuel cell system operation mode switching control method according to claim 2, wherein Determining that the fuel cell system meets the conditions for switching to the normal power generation mode includes: When it is determined that the remaining power of the power battery is not higher than a first power threshold, determining that the fuel cell system meets the conditions for switching to the normal power generation mode.

4. The fuel cell system operation mode switching control method according to claim 3, wherein Determining that the fuel cell system meets the conditions for switching to the hot standby mode includes: When it is determined that the remaining power of the power battery is not lower than a second power threshold, determining that the fuel cell system meets the conditions for switching to the hot standby mode; wherein, the second power threshold is greater than the first power threshold.

5. The method for controlling the operation mode switching of a fuel cell system according to claim 1, wherein Controlling the cathode system to intermittently supply air with a first pressure to the stack includes: Controlling the air compressor in the cathode system to operate at a first opening frequency and a first rotational speed, so that the cathode system intermittently supplies air with the first pressure to the stack.

6. The fuel cell system operation mode switching control method according to claim 1, characterized in that Controlling the anode system to intermittently supply hydrogen with a second pressure to the stack includes: Controlling the hydrogen injector in the anode system to operate at a second opening frequency and controlling the hydrogen circulation pump in the anode system to operate at a second rotational speed, so that the anode system intermittently supplies hydrogen with the second pressure to the stack.

7. The method for controlling the operation mode switching of the fuel cell system according to claim 1, characterized in that, Controlling the hydrogen injector in the anode system to operate at a second opening frequency includes: Based on the second pressure, determining the target nozzle of the hydrogen injector; Controlling the hydrogen injector to open the target nozzle to supply hydrogen to the stack at the second opening frequency.

8. A control device for switching the operating mode of a fuel cell system, characterized in that, Including: A mode switching unit, configured to, during the process that the fuel cell vehicle is in a parked state, when it is determined that the fuel cell system meets the conditions for switching to the hot standby mode, control the fuel cell system to switch to the hot standby mode for operation; A hot standby control unit, which is configured to control the cathode system to intermittently supply air with a first pressure to the fuel cell stack and control the anode system to intermittently supply hydrogen with a second pressure to the fuel cell stack during the operation of the fuel cell system in the hot standby mode, so that there is no hydrogen-air interface in the anode system of the fuel cell stack. The absence of a hydrogen-air interface in the anode system of the fuel cell stack includes maintaining the open-circuit voltage of the fuel cell stack within a target voltage range. Wherein, the first pressure and the second pressure satisfy the calibrated pressure difference corresponding to the fuel cell system; the voltage difference between the target voltage range and the output voltage range in the normal power generation mode is not higher than the voltage difference threshold.

9. A fuel cell control device, characterized in that, It includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the fuel cell system operation mode switching control method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by the processor, it implements the fuel cell system operation mode switching control method according to any one of claims 1-7.

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