A control method and device of a fuel cell engine and a storage medium

Abstract

This invention discloses a control method, apparatus, and storage medium for a fuel cell engine. The method includes: acquiring the current fuel cell stack current during fuel cell engine operation, as well as the current fuel cell stack voltage and actual metering ratio corresponding to the current fuel cell stack current; calculating the aging degree of the fuel cell stack based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine; determining the target metering ratio under the current fuel cell stack current based on the aging degree of the fuel cell stack; and calculating the target speed of the air compressor in the engine auxiliary system accessories based on the actual metering ratio and the target metering ratio, so that the air compressor operates according to the target speed. The technical solution provided by this invention enables the fuel cell engine to output optimal power.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to a control method, device, and storage medium for a fuel cell engine. Background Technology

[0002] A fuel cell engine consists of a fuel cell stack and a Balance of Plant (BOP) accessory system. The BOP accessory provides the operating conditions for the fuel cell stack, including a hydrogen / air subsystem that supplies the fuel cell stack with hydrogen / air at a specific flow rate or metering ratio, pressure, temperature, and humidity; and a cooling subsystem that supplies coolant to the fuel cell stack at a specific flow rate, pressure, and temperature. By controlling the operating conditions provided by each subsystem to the fuel cell stack, the safe and stable output of electrical energy from the fuel cell stack is ensured.

[0003] The fuel cell stack generates electricity, and the engine's BOP (Balance of Plant) accessories consume some of this electricity. Therefore, the output power of the fuel cell engine equals the power generated by the fuel cell stack minus the power consumed by the engine's BOP accessories. The vast majority of the power consumed by the engine's BOP accessories is by the air compressor in the air subsystem. The air compressor's function is to supply air to the fuel cell stack at a certain flow rate / metering ratio, and its power consumption is directly proportional to the flow rate / metering ratio of the air it supplies.

[0004] The power generation of the fuel cell stack and the power consumption of the engine BOP accessories are both related to the operating conditions provided by each subsystem. Therefore, in order to optimize the performance of the fuel cell engine, the stack operating conditions provided by each subsystem of the fuel cell engine at each fuel cell current point are generally calibrated by test to achieve the optimal power / efficiency at each current point.

[0005] However, as fuel cell engines operate for extended periods, the stack performance gradually deteriorates. The optimal operating conditions for a fuel cell engine in its aged state differ from the experimentally calibrated operating conditions in its initial state. This means that the aged fuel cell engine does not achieve its optimal performance, thus affecting its power output. Summary of the Invention

[0006] This invention provides a control method, device, and storage medium for a fuel cell engine to solve the problem that fuel cell engines in the aging state cannot output optimal power, thus affecting engine performance.

[0007] According to one aspect of the present invention, a control method for a fuel cell engine is provided, the fuel cell engine including a fuel cell stack and engine auxiliary system accessories, the method comprising:

[0008] The current fuel cell stack current during fuel cell engine operation is obtained, along with the current fuel cell stack voltage and actual metering ratio corresponding to the current fuel cell stack current.

[0009] The degree of aging of the fuel cell stack is calculated based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine.

[0010] The target metering ratio under the current of the current fuel cell stack is determined based on the aging degree of the fuel cell stack.

[0011] Based on the actual metering ratio and the target metering ratio, the target speed of the air compressor in the engine auxiliary system accessory is calculated so that the air compressor operates according to the target speed.

[0012] Optionally, the aging degree of the fuel cell stack is calculated based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine, including:

[0013] The aging degree of the fuel cell stack is calculated using the following formula:

[0014] .

[0015] Optionally, the initial fuel cell stack voltage is the voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine, which is obtained through pre-test calibration.

[0016] Optionally, determining the target metering ratio under the current of the current fuel cell stack based on the aging degree of the fuel cell stack includes:

[0017] Based on the aging degree of the fuel cell stack, the target metering ratio under the current of the current fuel cell stack is determined by consulting a preset calibration table.

[0018] Optionally, the target rotational speed of the air compressor in the engine auxiliary system accessory is calculated based on the actual metering ratio and the target metering ratio, including:

[0019] Based on the difference between the actual metering ratio and the target metering ratio, the target speed of the air compressor in the engine auxiliary system accessory is calculated using a PID control algorithm.

[0020] Optionally, the preset calibration table is a table of optimal metering ratios corresponding to each current point and each aging degree combination obtained by dividing the working current of the fuel cell stack into preset current intervals and the aging degree of the fuel cell stack into preset aging degree intervals through experimental calibration.

[0021] Optionally, the preset current interval is 50A.

[0022] Optionally, the preset aging intervals include 3%, 5%, 7%, and 10%.

[0023] According to another aspect of the present invention, a control device for a fuel cell engine is provided, the fuel cell engine including a fuel cell stack and engine auxiliary system accessories, the device comprising:

[0024] The acquisition module is used to acquire the current fuel cell stack current during the operation of the fuel cell engine, as well as the current fuel cell stack voltage and actual metering ratio corresponding to the current fuel cell stack current;

[0025] The calculation module is used to calculate the aging degree of the fuel cell stack based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine.

[0026] A determining module is used to determine the target metering ratio under the current current of the current fuel cell stack based on the aging degree of the fuel cell stack.

[0027] A control module is used to calculate the target speed of the air compressor of the engine auxiliary system accessory based on the actual metering ratio and the target metering ratio, so that the air compressor operates according to the target speed.

[0028] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the control method of a fuel cell engine according to any embodiment of the present invention.

[0029] The technical solution provided by this invention calculates the aging degree of the fuel cell stack in real time. Based on the aging degree of the fuel cell stack, the target metering ratio under the current current of the fuel cell stack is determined by querying a preset calibration table. This enables online adaptive adjustment of the required air flow / metering ratio at each current point, thereby optimizing the power generation characteristics of the aging stack and the power consumption characteristics of accessories, and enabling the fuel cell engine to output optimal power.

[0030] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A flowchart illustrating a control method for a fuel cell engine provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram comparing the performance of a fuel cell engine before and after metering ratio optimization, provided in an embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram illustrating the relationship between the performance of a fuel cell engine and its metering ratio at a current point of 200A, provided in an embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of the structure of a control device for a fuel cell engine provided in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the electronic device used in a control method for a fuel cell engine provided in an embodiment of the present invention. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] Figure 1The flowchart illustrates a control method for a fuel cell engine according to an embodiment of the present invention. This method can be executed by a control device for the fuel cell engine, which can be implemented in hardware and / or software and can be configured in any electronic device with communication capabilities. See also... Figure 1 The method includes:

[0040] S110. Obtain the current fuel cell stack current during fuel cell engine operation, as well as the current fuel cell stack voltage and actual metering ratio corresponding to the current fuel cell stack current.

[0041] Specifically, the fuel cell engine controller acquires the current fuel cell stack current and the corresponding current fuel cell stack voltage during fuel cell engine operation, as measured by the DC-DC controller. The fuel cell engine controller calculates and pre-stores the actual metering ratio corresponding to the current fuel cell stack current, which can be retrieved directly when needed. The actual metering ratio is obtained by calculating the ratio of the actual air mass flow rate to the theoretical air mass flow rate.

[0042] S120. Calculate the aging degree of the fuel cell stack based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current under the initial state of the fuel cell engine.

[0043] The initial fuel cell stack voltage is the voltage corresponding to the current of the fuel cell stack in the initial state of the fuel cell engine, which is obtained through pre-test calibration.

[0044] Specifically, the aging degree of the fuel cell stack is calculated using the following formula:

[0045] .

[0046] S130. Determine the target metering ratio under the current fuel cell stack based on the aging degree of the fuel cell stack.

[0047] Specifically, based on the aging degree of the fuel cell stack, the target metering ratio under the current fuel cell stack is determined by consulting a preset calibration table.

[0048] The preset calibration table is a table that obtains the optimal metering ratio for each current point and each aging degree combination by dividing the operating current of the fuel cell stack into preset current intervals and the aging degree of the fuel cell stack into preset aging degree intervals through experimental calibration. For example, the preset current interval can be 50A. The preset aging degree intervals can include 3%, 5%, 7%, and 10%.

[0049] S140. Calculate the target speed of the air compressor in the engine auxiliary system accessory based on the actual metering ratio and the target metering ratio, so that the air compressor operates according to the target speed.

[0050] Specifically, based on the difference between the actual metering ratio and the target metering ratio, the target speed of the air compressor in the engine auxiliary system accessory is calculated using a PID control algorithm.

[0051] The technical solution provided by this invention calculates the aging degree of the fuel cell stack in real time. Based on the aging degree of the fuel cell stack, the target metering ratio under the current current of the fuel cell stack is determined by querying a preset calibration table. This enables online adaptive adjustment of the required air flow / metering ratio at each current point, thereby optimizing the power generation characteristics of the aging stack and the power consumption characteristics of accessories, and enabling the fuel cell engine to output optimal power.

[0052] The following describes a specific embodiment of a control method for a fuel cell engine provided by the present invention. (See attached image.) Figure 2 , Figure 2 This is a schematic diagram comparing the performance of a fuel cell engine before and after metering ratio optimization, as provided in an embodiment of the present invention. Figure 2 There are 5 solid lines in total. Solid line 1 is the power generation of the fuel cell stack in the initial state of the fuel cell engine. Solid line 5 is the power consumption of the engine BOP accessories in the initial state of the fuel cell engine. Solid line 3 is the power generation of the fuel cell stack in the aging state of the fuel cell engine. Solid line 2 is the power generation of the fuel cell stack after the fuel cell engine has been aged and the metering ratio has been optimized. Solid line 4 is the power consumption of the engine BOP accessories after the fuel cell engine has been aged and the metering ratio has been optimized.

[0053] In the initial state, the output power of the fuel cell engine, P_freshsystem, equals the power generated by the fuel cell stack in the initial state, P_freshstack, minus the power consumed by the engine's BOP accessories in the initial state, P_loss. See details... Figure 2 The distance marked between solid line 1 and solid line 5.

[0054] After aging, the power generation of the fuel cell stack decreases, while the power consumption of the engine's BOP accessories remains unchanged. Therefore, the output power of the fuel cell engine, P_agedsystem, equals the power generation of the fuel cell stack under aging conditions, P_agedstack, minus the power consumption of the engine's BOP accessories under initial conditions, P_loss. (See details...) Figure 2 The distance between the solid line 3 and the solid line 5 is shown in the figure.

[0055] After optimizing the metering ratio, the power output of the fuel cell stack decreases, while the power consumption of the engine's BOP accessories increases. Therefore, the output power of the fuel cell engine, P_agedsystem_adjust, equals the power output of the fuel cell stack after aging and optimized metering ratio, P_agedstack_adjust, minus the power consumption of the engine's BOP accessories after aging and optimized metering ratio, P_loss_adjust. See details... Figure 2 The distance marked between solid line 2 and solid line 4.

[0056] from Figure 2 As can be seen, using the optimized metering ratio, the power output of the aged fuel cell stack decreases less than that of the aged fuel cell stack in the initial state. Furthermore, it can compensate for the additional power consumption of the engine BOP accessories due to the optimization. Since hydrogen consumption is related to current, and the current remains constant, under the same hydrogen consumption conditions, when the fuel cell engine is in the aged state, the power output of the fuel cell stack using the optimized metering ratio is higher than that of the fuel cell stack in the operating state. That is, the output power of the fuel cell engine after optimizing the metering ratio, P_agedsystem_adjust, is greater than the output power of the aged fuel cell engine, P_agedsystem.

[0057] Figure 3 This diagram illustrates the relationship between the performance and metering ratio of a fuel cell engine at a current of 200A, as provided in an embodiment of the present invention. (See also...) Figure 3 The horizontal axis represents the metering ratio, and the vertical axis represents the output power of the fuel cell engine. Figure 3 It can be seen that, under the initial state, the fuel cell engine has the highest output power when the metering ratio is 2, and when the aging degree is 10%, the fuel cell engine has the highest output power when the metering ratio is 2.2.

[0058] Figure 4 This is a schematic diagram of a control device for a fuel cell engine provided in an embodiment of the present invention. The device includes an acquisition module 410, a calculation module 420, a determination module 430, and a control module 440.

[0059] The acquisition module 410 is used to acquire the current fuel cell stack current during the operation of the fuel cell engine, as well as the current fuel cell stack voltage and actual metering ratio corresponding to the current fuel cell stack current.

[0060] The calculation module 420 is used to calculate the aging degree of the fuel cell stack based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current under the initial state of the fuel cell engine.

[0061] The determination module 430 is used to determine the target metering ratio under the current fuel cell stack current based on the aging degree of the fuel cell stack.

[0062] The control module 440 is used to calculate the target speed of the air compressor of the engine auxiliary system accessory based on the actual metering ratio and the target metering ratio, so that the air compressor operates according to the target speed.

[0063] The control device for a fuel cell engine provided in this embodiment of the invention can execute the control method for a fuel cell engine provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0064] According to another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to execute and implement the control method of a fuel cell engine according to any embodiment of the present invention.

[0065] Figure 5 This is a schematic diagram of an electronic device for a control method of a fuel cell engine provided in an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0066] like Figure 5 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 and a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, the ROM 12, and the RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0067] Multiple components in electronic device 10 are connected to input / output I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of monitors, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0068] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as a control method for a fuel cell engine.

[0069] In some embodiments, a control method for a fuel cell engine can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via read-only memory ROM 12 and / or communication unit 19. When the computer program is loaded into random access memory RAM 13 and executed by processor 11, one or more steps of the control method for a fuel cell engine described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform a control method for a fuel cell engine in any other suitable manner.

[0070] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transferring data and instructions to the storage system, the at least one input device, and the at least one output device.

[0071] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0072] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0073] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device for displaying information to a user; and a keyboard and pointing device through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with a user; for example, feedback provided to the user can be any form of sensory feedback; and input from the user can be received in any form.

[0074] The systems and technologies described herein can be implemented in computing systems that include backend components, middleware components, or frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium. Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0075] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0076] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0077] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A control method of a fuel cell engine including a fuel cell stack and engine auxiliary system accessories, characterized by, The method includes: The current fuel cell stack current during fuel cell engine operation is obtained, along with the current fuel cell stack voltage and actual metering ratio corresponding to the current fuel cell stack current. The degree of aging of the fuel cell stack is calculated based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine. The target metering ratio under the current of the current fuel cell stack is determined based on the aging degree of the fuel cell stack. Based on the actual metering ratio and the target metering ratio, the target speed of the air compressor in the engine auxiliary system accessory is calculated so that the air compressor operates according to the target speed.

2. The method according to claim 1, characterized in that, The aging degree of the fuel cell stack is calculated based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine, including: The aging degree of the fuel cell stack is calculated using the following formula: 。 3. The method according to claim 1, characterized in that, The initial fuel cell stack voltage is the voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine, which is obtained through pre-test calibration.

4. The method according to claim 1, characterized in that, The target metering ratio under the current of the current fuel cell stack is determined based on the aging degree of the fuel cell stack, including: Based on the aging degree of the fuel cell stack, the target metering ratio under the current of the current fuel cell stack is determined by consulting a preset calibration table.

5. The method according to claim 1, characterized in that, The target rotational speed of the air compressor in the engine auxiliary system accessory is calculated based on the actual metering ratio and the target metering ratio, including: Based on the difference between the actual metering ratio and the target metering ratio, the target speed of the air compressor in the engine auxiliary system accessory is calculated using a PID control algorithm.

6. The method according to claim 4, characterized in that, The preset calibration table is a table of optimal metering ratios corresponding to each current point and each aging degree combination obtained through experimental calibration by dividing the working current of the fuel cell stack into preset current intervals and the aging degree of the fuel cell stack into preset aging degree intervals.

7. The method according to claim 6, characterized in that, The preset current interval is 50A.

8. The method according to claim 6, characterized in that, The preset aging intervals include 3%, 5%, 7%, and 10%.

9. A control device for a fuel cell engine, the fuel cell engine comprising a fuel cell stack and engine auxiliary system accessories, characterized in that, The device includes: The acquisition module is used to acquire the current fuel cell stack current during the operation of the fuel cell engine, as well as the current fuel cell stack voltage and actual metering ratio corresponding to the current fuel cell stack current; The calculation module is used to calculate the aging degree of the fuel cell stack based on the current fuel cell stack voltage and the initial fuel cell stack voltage corresponding to the current fuel cell stack current in the initial state of the fuel cell engine. A determining module is used to determine the target metering ratio under the current current of the current fuel cell stack based on the aging degree of the fuel cell stack. A control module is used to calculate the target speed of the air compressor of the engine auxiliary system accessory based on the actual metering ratio and the target metering ratio, so that the air compressor operates according to the target speed.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the control method for the fuel cell engine according to any one of claims 1-8.

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