Operation control method, device and medium of a fuel cell system

Abstract

The present invention provides an operation control method for a fuel cell system, comprising: initializing parameters of the fuel cell system, receiving a power change request from an external system, obtaining a first required current by a fuel cell system controller according to the power change request, and setting the first required current as the target current; the fuel cell system controller responds to the request and performs a control operation to enable the fuel cell system to have both a high-efficiency power response rate and improved stability of the fuel cell system. The present invention also exemplarily discloses an operation control device and a storage medium for a fuel cell system.

Description

Technical Field

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

[0002] In the technical solution commonly adopted in the current industry, when the fuel cell system receives a specific power output request from an external system, it obtains the target current corresponding to the expected power of the fuel cell according to the target power, and obtains the current loading rate or unloading rate from the current fuel cell state. Then, the fuel cell system controller FCU controls the fuel cell current and adjusts the operation parameters according to the response rate. The fuel cell current is the DC / DC input current, and the operation parameters are the pressure, flow rate, temperature, humidity, and actuator set value of the fuel cell system.

[0003] In order to enable the fuel cell system to have a good response speed, the control of the fuel cell current and operation parameters usually adopts a synchronous change control method. The main parameters affecting the performance of the fuel cell are pressure, flow rate, temperature, humidity, etc. Compared with the current response rate of DC / DC, the above parameters have obvious hysteresis characteristics, and at the same time, it takes a certain time for the establishment and transmission of the internal pressure and flow rate of the fuel cell. The synchronous change control method adopted by the prior art cannot solve the above problems, which will cause deviations between the actual parameters and the calibrated parameters of the fuel cell system during load change. This phenomenon will lead to risks such as low fuel cell performance, water blockage, starvation, single low, and overheating during the load change process, triggering the fuel cell system to limit the output power or shut down, with a slow load change rate and low power response performance of the fuel cell system. Especially in fuel cell systems with a power of 200 kW and above, the problem is more prominent, seriously affecting the system stability, and continuous long-term operation will accelerate the fuel cell life attenuation.

[0004] However, it is difficult for the prior art to adjust the operation parameters in advance, so that the fuel cell does not have the optimal working condition state at each current point during subsequent operation. Therefore, the fuel cell control system needs to provide a mechanism to ensure the fuel cell performance and stability. This limits its application effect in some high-dynamic scenarios, leaving room for innovation and breakthrough for the present invention. Summary of the Invention

[0005] The present invention provides an operation control method, device, and computer-readable storage medium for a fuel cell system. By controlling the fuel cell current and current operation parameters, the fuel cell system can not only have a high power response rate but also improve the stability of the fuel cell system.

[0006] In a first aspect, a method for operating and controlling a fuel cell system is provided, including: initializing parameters of the fuel cell system, including: setting an initial state to a stable state, and making the parameter current, the operating current, and the target current equal; receiving a request for changing the power of an external system, and obtaining a first required current by a fuel cell system controller according to the power change request, and setting the first required current as the target current; the fuel cell system controller responding to the request and performing control operations, including: when the target current is greater than the operating current, setting the fuel cell system to a loading state, and the operating control method enters a loading process, calculating a loading hysteresis current according to a loading current rate and a loading hysteresis time, and increasing the parameter current and the operating current at the loading current rate until both the parameter current and the operating current reach the target current, after which the loading process is completed, so that the operating parameters are adjusted prior to the fuel cell current during loading; when the target current is less than the operating current, setting the fuel cell system to a unloading state, and the operating control method enters an unloading process, calculating an unloading hysteresis current according to an unloading current rate and an unloading hysteresis time, and decreasing the parameter current and the operating current at the unloading current rate until both the operating current and the parameter current reach the target current, after which the unloading process is completed, so that the operating parameters are adjusted after the fuel cell current during unloading; if, during the loading process, a request for changing the power of an external system is received, the fuel cell system controller obtains a second required current according to the power change request, when the second required current is greater than the target current, setting the second required current as the target current and continuing the loading process; when the second required current is less than the target current, after completing the loading process, setting the second required current as the target current, setting the fuel cell system to an unloading state, the operating control method enters an unloading process, and charging the external power battery with the excess output power; if, during the unloading process, a request for changing the power of an external system is received, the fuel cell system controller obtains a third required current according to the power change request, when the third required current is greater than the target current, after completing the unloading process, setting the third required current as the target current and entering the loading process; when the third required current is less than the target current, setting the third required current as the target current and continuing the unloading process.

[0007] In some embodiments, if, during the loading process, a request for changing the power of an external system is received, it further includes: if the difference between the operating current of the fuel cell system and the second required current is less than a first predetermined value and greater than or equal to zero, controlling the fuel cell system to maintain the current operating current.

[0008] In some embodiments, if an external system power increase request is received during the load reduction process, it further includes: if the difference between the operating current of the fuel cell system and the third demand current is less than a first predetermined value and greater than or equal to zero, controlling the fuel cell system to maintain the current operating current.

[0009] In some embodiments, during the load increase process, the operating current is the sum of the parameter current and the load increase hysteresis current; and during the load reduction process, the operating current is the difference between the parameter current and the load reduction hysteresis current.

[0010] In some embodiments, the load increase current rate range is 1 - 100 A / s, and the load reduction current rate range is 1 - 200 A / s.

[0011] In some embodiments, the execution time of the load increase process and the load reduction process is less than 20 s; otherwise, the fuel cell system will terminate and issue an alarm.

[0012] Second aspect, a running control device for a fuel cell system is provided, including: an initialization module for initializing parameters of the fuel cell system, including: setting an initialization state to a stable state, and making the parameter current, the running current, and the target current equal; a communication module for receiving a power change request from an external system, and the fuel cell system controller obtaining a first required current according to the power change request and setting the first required current as the target current; a control module for the fuel cell system controller to respond to the request and execute control operations, including: when the target current is greater than the running current, setting the fuel cell system to a loading state, and the running control method entering a loading process, calculating a loading hysteresis current according to a loading current rate and a loading hysteresis time, and increasing the parameter current and the running current at the loading current rate until both the parameter current and the running current reach the target current, after which the loading process is completed, so that the running parameters are adjusted prior to the fuel cell current during loading; when the target current is less than the running current, setting the fuel cell system to a unloading state, and the running control method entering an unloading process, calculating an unloading hysteresis current according to an unloading current rate and an unloading hysteresis time, and decreasing the parameter current and the running current at the unloading current rate until both the running current and the parameter current reach the target current, after which the unloading process is completed, so that the running parameters are adjusted after the fuel cell current during unloading; if a power change request from an external system is received during the loading process, the fuel cell system controller obtaining a second required current according to the power change request, when the second required current is greater than the target current, setting the second required current as the target current and continuing the loading process; when the second required current is less than the target current, after completing the loading process, setting the second required current as the target current, setting the fuel cell system to an unloading state, the running control method entering the unloading process, and charging an external power battery with the excess output power; if a power change request from an external system is received during the unloading process, the fuel cell system controller obtaining a third required current according to the power change request, when the third required current is greater than the target current, after completing the unloading process, setting the third required current as the target current and entering the loading process; when the third required current is less than the target current, setting the third required current as the target current and continuing the unloading process.

[0013] Third aspect, the present invention provides an electronic device, the electronic device including: a processor; a memory, on which computer-readable instructions are stored, and when the computer-readable instructions are executed by the processor, the running control method of the above fuel cell system is implemented.

[0014] Fourthly, the present invention further provides a computer-readable storage medium, characterized in that program codes are stored in the computer-readable storage medium, and the program codes can be called by a processor to execute the above-mentioned operation control method of the fuel cell system.

[0015] Compared with the prior art, the present invention can at least achieve one of the following beneficial effects:

[0016] First, during the loading process of the fuel cell system, the fuel cell always operates under the optimal working conditions, avoiding phenomena such as single low, starvation, and poor performance, improving the performance and stability of the fuel cell, increasing the loading rate, and extending the service life.

[0017] Second, during the unloading process of the fuel cell system, the fuel cell always operates under the sufficient working conditions, avoiding phenomena such as single low, water blockage, overheating, and poor performance, improving the performance and stability of the fuel cell, increasing the unloading rate, and extending the service life.

[0018] Third, it adapts to the variable load requirements of various external systems, solves the problem of performance degradation caused by frequent variable loads, improves the response rate of the fuel cell system, and extends the service life.

[0019] The invention content part is provided to introduce the selection of concepts in a simplified form, which will be further described in the specific implementation manners below. The invention content part is not intended to identify the important features or essential features of the present disclosure, nor is it intended to limit the scope of the present disclosure. Brief Description of the Drawings

[0020] By describing the exemplary embodiments of the present disclosure in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present disclosure will become more obvious, wherein, in the exemplary embodiments of the present disclosure, the same reference numerals generally represent the same components.

[0021] Figure 1 Shows the flowchart of the operation control method of the fuel cell system provided by the embodiment of the present application;

[0022] Figure 2 Is the schematic block diagram of the operation control device of the fuel cell system provided by the embodiment of the present application;

[0023] Figure 3 Is the schematic structural diagram of an electronic device provided by the embodiment of the present application. Detailed Description of the Embodiments

[0024] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be more thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0025] As used herein, the term "comprising" and variations thereof mean an open inclusion, that is, "including but not limited to". Unless otherwise specified, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included hereinafter.

[0026] This application provides a method for controlling the operation of a fuel cell system. Please refer to Figure 1 , which is a schematic diagram of the first embodiment of this application. The following combines Figure 1 to describe in detail a method for controlling the operation of a fuel cell system provided by the first embodiment of this application.

[0027] This application provides a method 100 for controlling the operation of a fuel cell system. The processing flow of this method 100 may include the following steps:

[0028] Step S102: Initialize parameters, that is, initialize the parameters of the fuel cell system, including: set the initialization state to a stable state, and make the parameter current, the operating current, and the target current equal.

[0029] Step S104: Receive a power change request from an external system, that is, receive a power change request from an external system. The fuel cell system controller obtains a first required current according to the power change request, and sets the first required current as the target current.

[0030] Step S106: Perform control operations, that is, the fuel cell system controller responds to the request and performs control operations, including: when the target current is greater than the operating current, the fuel cell system is set to the loading state, and the operation control method enters the loading process. Calculate the loading hysteresis current according to the loading current rate and the loading hysteresis time. The parameter current and the operating current increase at the loading current rate until both the parameter current and the operating current reach the target current, and then the loading process is completed, so that the operating parameters are adjusted prior to the fuel cell current during loading; when the target current is less than the operating current, the fuel cell system is set to the unloading state, and the operation control method enters the unloading process. Calculate the unloading hysteresis current according to the unloading current rate and the unloading hysteresis time. The parameter current and the operating current decrease at the unloading current rate until both the operating current and the parameter current reach the target current, and then the unloading process is completed, so that the operating parameters are adjusted after the fuel cell current during unloading. In this embodiment, firstly, during the loading process of the fuel cell system, the fuel cell operates at the optimal working condition at all times, avoiding phenomena such as single low, starvation, and poor performance, improving the performance and stability of the fuel cell, increasing the loading rate, and extending the service life. Secondly, during the unloading process of the fuel cell system, the fuel cell operates at the sufficient working condition at all times, avoiding phenomena such as single low, water blockage, overheating, and poor performance, improving the performance and stability of the fuel cell, increasing the unloading rate, and extending the service life.

[0031] In some embodiments, if a power change request from an external system is received during the loading process, the fuel cell system controller obtains a second required current according to the power change request. When the second required current is greater than the target current, the second required current is set as the target current, and the loading process continues; when the second required current is less than the target current, after the loading process is completed, the second required current is set as the target current, the fuel cell system is set to the unloading state, the operation control method enters the unloading process, and the excess output power is used to charge the external power battery; if a power change request from an external system is received during the unloading process, the fuel cell system controller obtains a third required current according to the power change request. When the third required current is greater than the target current, after the unloading process is completed, the third required current is set as the target current, and the loading process is entered; when the third required current is less than the target current, the third required current is set as the target current, and the unloading process continues. This embodiment can adapt to various external system variable load demand situations, solve the problem of performance degradation caused by frequent variable loads, improve the response rate of the fuel cell system, and extend the service life.

[0032] In some embodiments, if an external system power change request is received during the loading process, it further includes: if the difference between the operating current of the fuel cell system and the second demand current is less than a first predetermined value and greater than or equal to zero, controlling the fuel cell system to maintain the current operating current.

[0033] In some embodiments, if an external system power change request is received during the load reduction process, it further includes: if the difference between the operating current of the fuel cell system and the third demand current is less than a first predetermined value and greater than or equal to zero, controlling the fuel cell system to maintain the current operating current.

[0034] In some embodiments, during the loading process, the operating current is the sum of the parameter current and the loading hysteresis current; and during the load reduction process, the operating current is the difference between the parameter current and the load reduction hysteresis current.

[0035] In some embodiments, the loading current rate range is 1 - 100 A / s, and the load reduction current rate range is 1 - 200 A / s.

[0036] In some embodiments, the execution time of the loading process and the load reduction process is less than 20 s; otherwise, the fuel cell system will terminate and issue an alarm.

[0037] Figure 2 It is a schematic block diagram of an operating control device 200 of a fuel cell system shown according to an exemplary embodiment. The operating control device 200 of the fuel cell system includes: an initialization module 202, a communication module 204, and a control module 206, where:

[0038] The initialization module 202 is configured to initialize the parameters of the fuel cell system, including: setting the initialization state to a stable state, and making the parameter current, the operating current, and the target current equal.

[0039] The communication module 204 is configured to receive an external system power change request. The fuel cell system controller obtains a first demand current according to the power change request and sets the first demand current as the target current.

[0040] The control module 206 is configured to enable the fuel cell system controller to execute control operations in response to the request, including: when the target current is greater than the operating current, the fuel cell system is set to a loading state, and the operating control method enters a loading process. The loading hysteresis current is calculated based on the loading current rate and the loading hysteresis time. The parameter current and the operating current are increased at the loading current rate until both the parameter current and the operating current reach the target current, at which point the loading process is completed, so that the operating parameters are adjusted prior to the fuel cell current during loading; when the target current is less than the operating current, the fuel cell system is set to a unloading state, and the operating control method enters an unloading process. The unloading hysteresis current is calculated based on the unloading current rate and the unloading hysteresis time. The parameter current and the operating current are decreased at the unloading current rate until both the operating current and the parameter current reach the target current, at which point the unloading process is completed, so that the operating parameters are adjusted after the fuel cell current during unloading.

[0041] Figure 3 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention, as Figure 3 shown, the electronic device 300 may include a processor 3001 and a memory 3002. Optionally, the electronic device 300 may further include a transceiver 3003. Among them, the processor 3001 is connected to the memory 3002 and the transceiver 3003, such as through a communication bus. Computer-readable instructions are stored on the memory 3002, and when the computer-readable instructions are executed by the processor 3001, the steps of the operating control method of the fuel cell system as described above are implemented.

[0042] In a specific implementation, as an embodiment, the processor 3001 may include one or more CPUs, such as Figure 3 the CPU0 and CPU1 shown in

[0043] In a specific implementation, as an embodiment, the electronic device 300 may also include multiple processors, such as Figure 3 the processor 3001 and the processor 3004 shown in

[0044] Among them, the memory 3002 is used to store the software program for implementing the solution of the present invention and is controlled by the processor 3001 for execution. The specific implementation manner may refer to the above method embodiment and will not be elaborated here.

[0045] A transceiver 3003 for communicating with a network device or a terminal device.

[0046] Optionally, the transceiver 3003 may include a receiver and a transmitter. Among them, the receiver is used to implement the receiving function, and the transmitter is used to implement the transmitting function.

[0047] Optionally, the transceiver 3003 may be integrated with the processor 3001 or exist independently and be coupled to the processor 3001 through the interface circuit of the electronic device 300. The embodiments of the present invention do not make specific limitations on this.

[0048] It should be noted that Figure 3 the structure of the electronic device 300 shown in [[ ]] does not constitute a limitation on the electronic device. The actual electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements. In addition, the technical effects of the electronic device 300 can refer to the technical effects of the above method embodiments and will not be elaborated here.

[0049] In an exemplary embodiment, the present invention also provides a computer-readable storage medium. At least one instruction is stored in the computer-readable storage medium, and the at least one instruction is loaded and executed by a processor to implement the steps of the operation control method of the fuel cell system as described above. For example, the computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0050] The embodiments of the present invention also provide an electronic device, which includes: a processor; a memory, and computer-readable instructions are stored on the memory. When the computer-readable instructions are executed by the processor, the operation control method of the fuel cell system as described above is implemented.

[0051] The embodiments of the present invention provide a computer-readable storage medium, characterized in that program code is stored in the computer-readable storage medium, and the program code can be called by a processor to execute the operation control method of the fuel cell system as described above.

[0052] It should also be understood that the memory in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0053] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A and B may be singular or plural. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after, but it may also represent an "and / or" relationship, which can be specifically understood by referring to the context before and after.

[0054] It should be understood that in various embodiments of the present invention, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0055] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0056] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the devices, apparatuses, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0057] In several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0058] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the technical improvement of the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A method for operating and controlling a fuel cell system, characterized in that, Including: Initializing the parameters of the fuel cell system, including: setting the initialization state to a stable state, and making the parameter current, operating current, and target current equal; Receiving an external system power change request, and the fuel cell system controller obtaining a first required current according to the power change request and setting the first required current as the target current; The fuel cell system controller responding to the request and performing control operations, including: when the target current is greater than the operating current, setting the fuel cell system to a loading state, the operation control method entering a loading process, calculating a loading hysteresis current according to a loading current rate and a loading hysteresis time, increasing the parameter current and the operating current at the loading current rate until both the parameter current and the operating current reach the target current, after which the loading process is completed, so that the operating parameters during loading are adjusted prior to the fuel cell current; when the target current is less than the operating current, setting the fuel cell system to a unloading state, the operation control method entering an unloading process, calculating an unloading hysteresis current according to an unloading current rate and an unloading hysteresis time, decreasing the parameter current and the operating current at the unloading current rate until both the operating current and the parameter current reach the target current, after which the unloading process is completed, so that the operating parameters during unloading are adjusted after the fuel cell current; If, during the loading process, an external system power change request is received, the fuel cell system controller obtaining a second required current according to the power change request, when the second required current is greater than the target current, setting the second required current as the target current and continuing the loading process; when the second required current is less than the target current, after completing the loading process, setting the second required current as the target current, setting the fuel cell system to an unloading state, the operation control method entering an unloading process, and charging the external power battery with the excess output power; If, during the unloading process, an external system power change request is received, the fuel cell system controller obtaining a third required current according to the power change request, when the third required current is greater than the target current, setting the third required current as the target current after completing the unloading process and entering the loading process; when the third required current is less than the target current, setting the third required current as the target current and continuing the unloading process.

2. The operation control method of the fuel cell system according to claim 1, characterized in that If, during the loading process, an external system power change request is received, it further includes: If the difference between the operating current of the fuel cell system and the second required current is less than a first predetermined value and greater than or equal to zero, controlling the fuel cell system to maintain the current operating current.

3. The operating control method of the fuel cell system according to claim 2, wherein If, during the unloading process, an external system power change request is received, it further includes: If the difference between the operating current of the fuel cell system and the third required current is less than a first predetermined value and greater than or equal to zero, controlling the fuel cell system to maintain the current operating current.

4. The operating control method of the fuel cell system according to claim 3, characterized in that: In the loading process, the operating current is the sum of the parameter current and the loading hysteresis current; And In the unloading process, the operating current is the difference between the parameter current and the unloading hysteresis current.

5. The operating control method of the fuel cell system according to claim 4, characterized in that: The loading current rate range is 1 - 100 A / s, and the unloading current rate range is 1 - 200 A / s.

6. The operating control method of the fuel cell system according to claim 5, characterized in that, The execution time of the loading process and the unloading process is less than 20 s, otherwise, the fuel cell system will terminate and issue an alarm.

7. An operating control device for a fuel cell system, characterized in that, Comprising: An initialization module, configured to initialize the parameters of the fuel cell system, including: setting the initialization state to a stable state, and making the parameter current, the operating current, and the target current equal; A communication module, configured to receive a power change request from an external system. The fuel cell system controller obtains a first required current according to the power change request, and sets the first required current as the target current; A control module is used for the fuel cell system controller to respond to the request and perform control operations, including: when the target current is greater than the operating current, the fuel cell system is set to the loading state, and the operation control method enters the loading process. The loading hysteresis current is calculated based on the loading current rate and the loading hysteresis time. The parameter current and the operating current increase at the loading current rate until both the parameter current and the operating current reach the target current, and then the loading process is completed, so that the operating parameters are adjusted prior to the fuel cell current during loading; when the target current is less than the operating current, the fuel cell system is set to the unloading state, and the operation control method enters the unloading process. The unloading hysteresis current is calculated based on the unloading current rate and the unloading hysteresis time. The parameter current and the operating current decrease at the unloading current rate until both the operating current and the parameter current reach the target current, and then the unloading process is completed, so that the operating parameters are adjusted after the fuel cell current during unloading; if a power change request from an external system is received during the loading process, the fuel cell system controller obtains a second required current according to the power change request. When the second required current is greater than the target current, the second required current is set as the target current, and the loading process continues; when the second required current is less than the target current, after the loading process is completed, the second required current is set as the target current, the fuel cell system is set to the unloading state, the operation control method enters the unloading process, and the excess output power is used to charge an external power battery; if a power change request from an external system is received during the unloading process, the fuel cell system controller obtains a third required current according to the power change request. When the third required current is greater than the target current, after the unloading process is completed, the third required current is set as the target current, and the loading process is entered; when the third required current is less than the target current, the third required current is set as the target current, and the unloading process continues.

8. An electronic device, characterized in that, The electronic device includes: a processor; a memory, on which computer-readable instructions are stored. When the computer-readable instructions are executed by the processor, the operation control method of the fuel cell system according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium, characterized in that, Program code is stored in the computer-readable storage medium, and the program code can be called by the processor to execute the operation control method of the fuel cell system according to any one of claims 1 to 6.

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