Fuel cell system control method, device, apparatus, and storage medium

Abstract

The application discloses a fuel cell system control method, device, equipment and storage medium, relates to the battery system control technical field, and discloses a fuel cell system control method, which comprises the following steps: acquiring a vehicle operation mode, a remaining power supply of a power battery, an idling permission state of a fuel cell system and an operating state of a stack system in a fuel electricity management mode; in the case where the operating state of the stack system is a preset state, when the vehicle operation mode is a hybrid mode and the remaining power supply of the power battery is greater than a first power threshold, determining a whole vehicle requested power, and determining an idling control mode or a target power mode as a target control mode according to the idling permission state of the fuel cell system; and controlling the fuel cell system according to the whole vehicle requested power and the target control mode. The scheme can reduce unnecessary stack start-stop of the fuel cell system and prolong the service life of the fuel cell.

Description

Technical Field

[0001] This application relates to the field of battery system control technology, and in particular to fuel cell system control methods, devices, equipment and storage media. Background Technology

[0002] In hydrogen fuel cell vehicles, the hydrogen fuel cell system operates independently of the vehicle. When the system is operational, its output power is used to drive the vehicle and, if excess, to charge the battery. The electrical energy output from the fuel cell engine is boosted to a high voltage level matched to the battery by the Direct Current Converter for Fuel Cell (DCF) and connected to the vehicle's high-voltage circuit, forming a parallel power system with the battery. Currently, the start-up and shutdown of the fuel cell system are controlled by the Vehicle Control Unit (VCU). When the vehicle needs the fuel cell system to operate, the VCU sends a start-up command to the Fuel Cell Control Unit (FCU) to start the stack; when it does not need to operate, it sends a shutdown command to the FCU to shut down the stack. However, the number of start-ups and shutdowns is strictly limited throughout the fuel cell system's lifespan; frequent start-ups and shutdowns will shorten the fuel cell's lifespan and reduce reliability.

[0003] In existing solutions, the fuel cell system is typically shut down when the remaining State of Charge (SOC) of the battery exceeds a set value in hybrid mode. However, special operating conditions, such as prolonged idling and hybrid charging when the vehicle's SOC is high, can cause the SOC to exceed the set value, leading the VCU to send a shutdown command to the FCU to shut down the fuel cell stack. This can cause unnecessary fuel cell stack start-ups and shutdowns, even in non-faulty conditions or when the vehicle is not under high voltage. Reducing unnecessary fuel cell stack start-ups and shutdowns and extending fuel cell lifespan remains a problem to be solved.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this application is to provide a fuel cell system control method, apparatus, equipment, and storage medium, aiming to solve the technical problem of how to reduce unnecessary fuel cell stack start-ups and shutdowns and extend fuel cell lifespan.

[0006] To achieve the above objectives, this application proposes a fuel cell system control method, which includes: Under the fuel cell management mode, the vehicle operating mode, the remaining power battery charge, the idling speed allowable status of the fuel cell system, and the operating status of the fuel cell stack system are obtained; When the fuel cell stack system is in a preset operating state, and the vehicle is in hybrid mode and the remaining power of the power battery is greater than a first power threshold, the requested power of the vehicle is determined, and the target control mode is determined based on the idling allowable state of the fuel cell system and the idling control mode or target power mode. The fuel cell system is controlled according to the requested power of the vehicle and the target control mode.

[0007] In one embodiment, the preset state includes a running state; The step of determining the vehicle's requested power and, based on the fuel cell system's idle speed allowable state and determining the idle speed control mode or target power mode as the target control mode, when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than a first power threshold, includes: When the stack system is in the operating state, a stack start command is sent to the fuel cell system to switch the vehicle operating mode to hybrid mode and determine the vehicle's required power as the vehicle's requested power. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is allowed to enter idle mode, the idle control mode is determined to be the target control mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is not allowed to enter idle mode, the target power mode is determined as the target control mode.

[0008] In one embodiment, the preset state includes a ready state, a startup state, a power-on self-test state, and a running state; The step of determining the vehicle's requested power and, based on the fuel cell system's idle speed allowable state and determining the idle speed control mode or target power mode as the target control mode, when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than a first power threshold, includes: When the stack system is in any of the following states: ready, startup, power-on self-test, and operation, a stack start command is sent to the fuel cell system to switch the vehicle operation mode to pure electric mode and determine the vehicle's required power as the vehicle's requested power. If the fuel cell system is determined to be in the startup state or in operation state within the preset timeout period of sending the startup command, the vehicle operation mode is switched to hybrid mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is allowed to enter idle mode, the idle control mode is determined to be the target control mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is not allowed to enter idle mode in idle control mode, the target power mode is determined as the target control mode.

[0009] In one embodiment, the step of controlling the fuel cell system according to the requested power of the vehicle and the target control mode includes: In the target power mode, the idle speed reference power is determined as the vehicle's requested power to control the fuel cell system; When the remaining charge of the power battery is less than the second charge threshold, the required power of the vehicle is determined as the requested power of the vehicle, and the process returns to the step of determining the required power of the vehicle as the requested power of the vehicle when the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and determining the idle speed control mode or target power mode as the target control mode based on the idle speed allowable state of the fuel cell system, wherein the second charge threshold is less than the first charge threshold; When the remaining charge of the power battery is greater than the third charge threshold and the idling allowable state of the fuel cell system is allowed to enter idling, the vehicle demand power is determined to be the vehicle requested power, and the idling control mode is determined to be the target control mode, wherein the third charge threshold is greater than the first charge threshold; The fuel cell system is controlled according to the requested power of the vehicle and the target control mode.

[0010] In one embodiment, the step of controlling the fuel cell system according to the requested power of the vehicle and the target control mode includes: In the idle speed control mode, the idle speed reference power is determined as the vehicle's requested power to control the fuel cell system; After determining the idle speed reference power as the vehicle's requested power in the idle speed control mode to control the fuel cell system, the following steps are included: When the remaining power of the power battery is less than the second power threshold, the idle speed control mode is deactivated, and the idle speed stop status is detected. When the idle stop state is completed, return to the step of determining the vehicle's required power as the vehicle's requested power when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than the first power threshold, and determine the idle control mode or target power mode as the target control mode based on the idle allowable state of the fuel cell system.

[0011] In one embodiment, before the step of obtaining the vehicle operating mode, the remaining power battery charge, and the idling allowable state of the fuel cell system in the fuel cell management mode, the method further includes: When the vehicle is in a ready state, the remaining power battery charge is less than or equal to the first power threshold, the pure electric drive switch is in the off state, and the fuel cell system communication status is in the non-timeout state, the vehicle enters the fuel cell management mode. In the fuel cell electric management mode, a shutdown command is sent to the fuel cell system, and the idle speed reference power is determined as the vehicle's requested power. The vehicle's operating mode is then switched to pure electric mode to shut down the fuel cell system's stack.

[0012] In one embodiment, after the step of acquiring the vehicle operating mode, remaining battery charge, idling allowable status of the fuel cell system, and operating status of the fuel cell stack system under the fuel cell management mode, the method further includes: If the stack system is not in the preset operating state, a shutdown command is sent to the fuel cell system, and the idle speed reference power is determined to be the vehicle's requested power, so as to shut down the fuel cell stack.

[0013] Furthermore, to achieve the above objectives, this application also proposes a fuel cell system control device, which includes: The data acquisition module is used to acquire the vehicle operating mode, the remaining power battery charge, the idling allowable status of the fuel cell system, and the operating status of the fuel cell stack system in the fuel cell management mode. The mode switching module is used to determine the vehicle's requested power when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than a first power threshold, and to determine the target control mode based on the idling allowable state of the fuel cell system and the idling control mode or target power mode. The system control module is used to control the fuel cell system according to the requested power of the vehicle and the target control mode.

[0014] In addition, to achieve the above objectives, this application also proposes a fuel cell system control device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the fuel cell system control method as described above.

[0015] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the fuel cell system control method described above.

[0016] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the fuel cell system control method described above.

[0017] One or more technical solutions proposed in this application have at least the following technical effects: By collecting data on vehicle operating mode, remaining battery charge, and fuel cell system idle speed allowable status, and determining the target control mode based on preset conditions, the fuel cell can be prevented from shutting down when the battery charge is too high. The fuel cell can be kept running continuously in idle speed control or target power mode, preventing the vehicle from entering a shutdown state when the remaining battery charge exceeds the set value in hybrid mode. This reduces unnecessary start-stop operations and effectively improves the service life and operational reliability of the fuel cell. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of an embodiment of the fuel cell system control method of this application; Figure 2 This is a schematic flowchart of Embodiment 2 of the fuel cell system control method of this application; Figure 3 This is a simplified flowchart illustrating the fuel cell system control method provided in Embodiment 2 of this application; Figure 4 This is a schematic diagram of the module structure of the fuel cell system control device according to an embodiment of this application; Figure 5 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the fuel cell system control method in this application embodiment.

[0021] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0023] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0024] The main solution of this application embodiment is as follows: Under the fuel cell power management mode, the vehicle operating mode, the remaining power battery charge, the idling allowable state of the fuel cell system, and the stack system operating state are obtained; when the stack system operating state is a preset state, and the vehicle operating mode is a hybrid mode, and the remaining power battery charge is greater than a first charge threshold, the requested power of the vehicle is determined, and the idling allowable state of the fuel cell system and the idling control mode or target power mode are determined as the target control mode; the fuel cell system is controlled according to the requested power of the vehicle and the target control mode.

[0025] This application provides a solution in which, when the remaining charge of the power battery exceeds a set value in hybrid mode, the vehicle controller continues to send a stack start command and, depending on whether the fuel cell system is currently allowed to enter idle control, allows the fuel cell system to enter idle control state or minimum power control state. At the same time, the vehicle controller sends a zero power request, so that the fuel cell system is in working state but does not output power or only outputs very low power, maintaining a stable charge level of the power battery, thereby achieving the purpose of not shutting down the fuel cell system even when the remaining charge of the power battery exceeds the set value.

[0026] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device or vehicle controller capable of performing the above functions. The following description uses a vehicle controller as an example to illustrate this embodiment and the subsequent embodiments.

[0027] Based on this, embodiments of this application provide a fuel cell system control method, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the fuel cell system control method of this application.

[0028] In this embodiment, the fuel cell system control method includes steps S10 to S30: Step S10: Under the fuel cell management mode, obtain the vehicle operating mode, the remaining power battery charge, the idling allowable status of the fuel cell system, and the operating status of the fuel cell stack system. It should be noted that the fuel cell power management mode is the working mode in hydrogen fuel cell vehicles that uses fuel cells as the power source. In this mode, the energy supply and distribution of fuel cells and power batteries are coordinated in a unified manner.

[0029] Additionally, the vehicle operating mode refers to the current power drive mode of the vehicle, mainly including pure electric drive and hybrid drive. The remaining charge of the power battery is the ratio of the currently available charge to the rated total capacity, used to directly reflect the power battery's charge reserve level. The fuel cell system's idling allowable state is a parameter determining whether the fuel cell can enter idling control, divided into two categories: can enter idling control and cannot enter idling control.

[0030] In addition, the fuel cell system operating status is the current working stage of the fuel cell, used to reflect the working progress and readiness of the fuel cell in real time.

[0031] It should be understood that after entering the fuel cell electric management mode, relevant data on the vehicle's operating mode will be collected in real time, and the specific value of the remaining power battery charge will be read. Simultaneously, the determination result of the fuel cell system's idling allowable state and specific information on the stack system's operating status will be obtained, completing the collection of four types of parameters.

[0032] Step S20: When the fuel cell stack system is in a preset operating state, and the vehicle is in hybrid mode and the remaining power of the power battery is greater than the first power threshold, determine the requested power of the vehicle, and determine the target control mode based on the idling allowable state of the fuel cell system and the idling control mode or target power mode. It should be noted that the preset state is a pre-set operating state used to determine whether the fuel cell stack meets the conditions for mode switching, and it is the basic premise for the fuel cell stack to perform mode adjustment.

[0033] Additionally, hybrid mode is an operating mode in which the vehicle simultaneously utilizes both a fuel cell and a power battery to provide power. The first charge threshold is a pre-set critical value used to determine whether the power battery charge is too high. It is the key charge standard that triggers the switching of fuel cell mode; for example, it can be set to 80%.

[0034] Additionally, the vehicle power request is a power demand command sent by the vehicle controller to the fuel cell, specifying the power output of the fuel cell. Idle control mode is a control mode that stops the fuel cell from outputting power, maintaining the stack's operation without performing a shutdown operation. Target power mode is a control mode where the fuel cell outputs extremely low power, serving as an alternative when idle control mode cannot be enabled.

[0035] In addition, the target control mode is the final selected operating mode for regulating the fuel cell, and its specific type is directly determined by the idling allowable state of the fuel cell system.

[0036] It should be understood that the first step is to determine whether the fuel cell stack system has reached the preset operating state. Only after the conditions are met should the vehicle operating mode and the remaining charge of the power battery be checked one by one. When the vehicle is in hybrid mode and the remaining charge of the power battery exceeds the first charge threshold, the specific value of the vehicle's requested power is first calculated and determined. Based on the results of the fuel cell system's idling allowable state, one of the idle speed control mode and the target power mode is selected as the target control mode.

[0037] In one possible implementation, step S301 may be included after step S30: Step S301: If the stack system is not in a preset operating state, a shutdown command is sent to the fuel cell system, and the idle speed reference power is determined to be the vehicle's requested power, so as to shut down the fuel cell stack of the fuel cell system.

[0038] It should be noted that the fuel cell stack operating status is an indicator of the different stages the fuel cell stack is in during operation, used to reflect the working progress and readiness of the fuel cell stack in real time.

[0039] Additionally, the shutdown command is used to control the fuel cell to stop working. Sending this command will trigger the relevant shutdown operation process of the fuel cell.

[0040] In addition, the idle reference power is a pre-set basic power value used in idle mode. It is an important reference standard for power control in idle state, and can be 0 for example.

[0041] It should be understood that the operating status of the fuel cell stack is first determined, and the corresponding control operation is executed only after confirming that the status does not meet the requirements of the preset status. A shutdown command is sent to the fuel cell, and the idle speed reference power is set as the vehicle's requested power. Based on the execution of the shutdown command and the setting of the power value, the fuel cell stack shutdown operation is completed.

[0042] In one feasible implementation, the preset state includes a running state; Step S20 may include steps A21 to A23: Step A21: When the stack system is in the operating state, send a stack start command to the fuel cell system, switch the vehicle operating mode to hybrid mode, and determine the vehicle's required power as the vehicle's requested power. It should be noted that the start-up command is used to control the start-up of the fuel cell stack. Sending this command will trigger the relevant start-up operation process of the fuel cell stack to ensure that the fuel cell stack remains in working condition.

[0043] In addition, the vehicle power demand is the actual power required by the vehicle under the current operating conditions, which is a power parameter calculated by the vehicle controller.

[0044] It should be understood that the first step is to determine whether the fuel cell stack system is in an operational state. Once the conditions are confirmed to be met, a stack start command is sent to the fuel cell. The vehicle's current operating mode is switched to hybrid mode, completing the adjustment of the power drive mode. The vehicle's required power value is directly determined as the vehicle's requested power, completing the setting of the power command.

[0045] Step A22: When the vehicle operating mode is hybrid mode and the remaining power battery charge is greater than the first power threshold, and when the fuel cell system idle speed allowable state is allowed to enter idle speed, the idle speed control mode is determined to be the target control mode. It should be noted that when the vehicle is in hybrid mode and the remaining power battery charge is confirmed to be greater than the first charge threshold, if the fuel cell is determined to be allowed to enter idle mode, the mode selection operation is performed to determine the idle control mode as the target control mode, thus completing the selection of the fuel cell working mode.

[0046] Step A23: When the vehicle operating mode is hybrid mode and the remaining power of the power battery is greater than the first power threshold, and when the idling allowable state of the fuel cell system is not allowed to enter idling, the target power mode is determined to be the target control mode.

[0047] It should be noted that when the vehicle is confirmed to be in hybrid mode and the remaining power battery charge is greater than the first charge threshold, if the fuel cell is determined to be in an idling state that is not allowed to enter idling and the idling control mode cannot be activated, the target power mode will be set as the target control mode to ensure that the fuel cell stack is continuously in working state.

[0048] In one feasible implementation, the preset states include a ready state, a startup state, a power-on self-test state, and a running state. Step S20 may include steps B21 to B24: Step B21: When the stack system is in any one of the ready state, the startup state, the power-on self-test state, and the operating state, send a stack start command to the fuel cell system, switch the vehicle operating mode to pure electric mode, and determine the vehicle's required power as the vehicle's requested power. It should be noted that pure electric mode is the operating mode in which the vehicle relies solely on the power battery for power, and the fuel cell does not participate in the power output in this mode.

[0049] It should be understood that the process first determines whether the fuel cell stack system is in any of the preset states. Once the conditions are met, a start-up command is sent to the fuel cell. The vehicle's operating mode is then switched to pure electric mode, completing the adjustment of the power drive mode. The vehicle's required power value is determined as the vehicle's requested power, completing the power command setting process.

[0050] Step B22: When the operating state of the fuel cell system is determined to be either in the startup state or in the running state within the preset timeout period for sending the startup command, the vehicle operating mode is switched to hybrid mode. It should be noted that the preset timeout duration is a pre-set time length used to determine whether the startup command is valid, and is the time standard for judging the startup process of the fuel cell stack.

[0051] It should be understood that a timer begins after the start-up command is sent, and the operating status of the fuel cell stack system is continuously monitored within a preset timeout period. When the fuel cell stack system is detected to be in a start-up or running state, a vehicle operating mode switching operation is performed. The vehicle operating mode is switched from pure electric mode to hybrid mode to prepare for the fuel cell to participate in power output.

[0052] Step B23: When the vehicle operating mode is hybrid mode and the remaining power battery charge is greater than the first power threshold, and when the fuel cell system idle speed allowable state is allowed to enter idle speed, the idle speed control mode is determined to be the target control mode. It should be understood that the vehicle's operating mode is first verified to be hybrid mode, and the remaining charge of the power battery is confirmed to be greater than the first charge threshold. The idling permission status of the fuel cell system is determined to be allowed to enter idling mode. After all conditions are met, the mode selection operation is executed. The idling control mode is determined as the target control mode, completing the final selection of the fuel cell operating mode.

[0053] Step B24: When the vehicle operating mode is hybrid mode and the remaining power of the power battery is greater than the first power threshold, and the idling allowable state of the fuel cell system in the idling control mode is not allowed to enter the idling mode, the target power mode is determined as the target control mode.

[0054] It should be understood that when the vehicle is confirmed to be in hybrid mode, and the remaining charge of the power battery is greater than the first charge threshold, if the idle speed control mode determines that the fuel cell system is not allowed to enter idle speed, the idle speed control mode cannot be activated. In this case, the target power mode is set as the target control mode to ensure that the fuel cell stack remains in operation and is not shut down.

[0055] Step S30: Control the fuel cell system according to the requested power of the vehicle and the target control mode.

[0056] It should be noted that fuel cell control is the operation of adjusting the working state of the fuel cell according to the vehicle's instructions, which involves adjusting the power output and switching the working mode.

[0057] It should be understood that the determined power request from the vehicle is sent to the fuel cell, and the corresponding control logic is executed according to the requirements of the target control mode. Through the coordinated operation of power commands and mode commands, the fuel cell maintains its operating state without outputting excessive power, thus keeping the remaining charge of the power battery stable.

[0058] In one feasible implementation, step S30 may include steps A31 to A34: Step A31: In the target power mode, the idle speed reference power is determined as the vehicle's requested power to control the fuel cell system; It should be understood that when the target power mode is confirmed, the idle reference power value is set to the vehicle's requested power. Based on the set vehicle requested power, control operations are performed on the fuel cell to maintain it in an extremely low power output state.

[0059] Step A32: When the remaining power battery charge is less than the second power battery threshold, determine the vehicle demand power as the vehicle request power, and return to the step of determining the vehicle demand power as the vehicle request power when the vehicle operating mode is hybrid mode and the remaining power battery charge is greater than the first power battery threshold, and determine the target control mode based on the fuel cell system idle speed allowable state and the idle speed control mode or target power mode, wherein the second power battery threshold is less than the first power battery threshold; It should be noted that the second power threshold is a pre-set critical value used to determine whether the power battery power is too low. This value is less than the first power threshold and is the key power standard for exiting the target power mode. For example, it can be set to 75%.

[0060] It should be understood that the remaining power of the power battery is monitored first. When the remaining power is less than a second power threshold, the vehicle's required power is determined as the vehicle's requested power. After the power setting is completed, the process returns to the steps of determining the remaining power of the power battery and selecting the target control mode in hybrid mode, and the mode determination process is executed again.

[0061] Step A33: When the remaining power of the power battery is greater than the third power threshold and the idling allowable state of the fuel cell system is allowed to enter idling, the vehicle demand power is determined to be the vehicle requested power, and the idling control mode is determined to be the target control mode, wherein the third power threshold is greater than the first power threshold. It should be noted that the third battery level threshold is a pre-set critical value used to determine whether the battery level is at an extremely high level. This value is greater than the first battery level threshold and is the key battery level standard for switching to idle control mode. For example, it can be set to 85%.

[0062] It should be understood that the remaining charge of the power battery is monitored first. When the charge exceeds the third charge threshold, the idling state of the fuel cell system is simultaneously determined to be allowed to enter idling. After all conditions are met, the vehicle's power demand is determined as the vehicle's requested power, and then the idling control mode is determined as the target control mode.

[0063] Step A34: Control the fuel cell system according to the requested power of the vehicle and the target control mode.

[0064] It should be noted that fuel cell control is the operation of adjusting the working state of the fuel cell according to the vehicle's instructions, which involves adjusting the power output and switching the working mode.

[0065] It should be understood that the determined power request from the vehicle is sent to the fuel cell, and the corresponding control logic is executed according to the requirements of the target control mode. Through the coordinated operation of power commands and mode commands, the fuel cell maintains an appropriate operating state and keeps the remaining charge of the power battery stable.

[0066] In one feasible implementation, step S30 may include steps B31 to B33: Step B31: In the idle speed control mode, the idle speed reference power is determined as the vehicle's requested power to control the fuel cell system; It should be understood that when it is confirmed that the current idle speed control mode is in effect, the idle speed reference power value is set to the vehicle's requested power. Based on the set vehicle requested power, control operations are performed on the fuel cell to keep it in a state where it stops outputting power.

[0067] After determining the idle speed reference power as the vehicle's requested power in the idle speed control mode to control the fuel cell system, the following steps are included: Step B32: When the remaining power battery charge is less than the second power threshold, the idle speed control mode is deactivated, and the idle speed stop status is detected. It should be noted that the idle stop status is a status parameter reflecting the process of releasing the idle speed control mode, used to indicate the execution progress of the idle speed release operation.

[0068] It should be understood that the remaining battery charge is monitored in real time, and when this value falls below the second charge threshold, the idle speed control mode is deactivated. After the idle speed control mode is deactivated, specific information about the idle stop status is continuously collected and monitored to understand the real-time status of the idle speed deactivation.

[0069] Step B33: When the idle stop state is completed, return to the step of determining the vehicle's required power as the vehicle's requested power when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than the first power threshold, and determine the idle control mode or target power mode as the target control mode based on the idle allowable state of the fuel cell system.

[0070] It should be noted that the shutdown completion is a result of the idle speed shutdown state, indicating that the idle speed control mode has been completely released and the fuel cell stack has returned to a normally controllable state.

[0071] It should be understood that after determining the idle stop state and confirming that all idle release operations have been completed, the process returns to the steps of determining the remaining battery charge and selecting the target control mode in hybrid mode, and the mode determination and power setting process is re-executed.

[0072] This embodiment provides a fuel cell system control method. By collecting data on vehicle operating mode, remaining battery charge, and fuel cell system idle speed allowable status, and determining the target control mode based on preset conditions, the method can prevent the fuel cell from shutting down when the battery charge is too high. It maintains continuous operation of the fuel cell by using idle speed control or target power mode, preventing the vehicle from entering a stack shutdown state when the remaining battery charge exceeds a set value in hybrid mode. This reduces unnecessary start-stop operations and effectively improves the service life and operational reliability of the fuel cell.

[0073] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 Before step S10, the fuel cell system control method further includes steps S01~S02: Step S01: When the vehicle is in a ready state, the remaining power battery charge is less than or equal to the first power threshold, the pure electric drive switch is in the off state, and the fuel cell system communication status is in the non-timeout state, the vehicle enters the fuel cell management mode. It should be noted that the vehicle's driving readiness status is a state parameter reflecting whether the vehicle has entered a high-voltage power supply and can be driven. This parameter is divided into two results: not ready and ready.

[0074] Additionally, the ready state is a result of the vehicle's overall driving readiness, indicating that the vehicle has completed high-voltage power-on and is ready for driving. The pure electric drive switch is a switching component that controls whether the vehicle enters pure electric drive mode; this switch has two states: closed and open.

[0075] Additionally, the fuel cell system communication status is a parameter indicating whether data transmission between the vehicle controller and the fuel cell controller is normal, and it has two possible outcomes: no timeout and timeout. The no-timeout status is one outcome of the fuel cell system communication status, representing normal and uninterrupted data transmission between the vehicle and the fuel cell.

[0076] It should be understood that the conditions for determining the vehicle's driving readiness status, the remaining power battery charge, the pure electric drive switch, and the fuel cell system communication status are determined one by one. When the vehicle is in a ready state, the remaining power battery charge is less than or equal to the first charge threshold, the pure electric drive switch is in the off state, and the fuel cell system communication status is in the non-timeout state, a mode switching operation is performed. The vehicle's operating mode is switched to fuel cell electric management mode, completing the mode entry control process.

[0077] In step S02, under the fuel cell management mode, a shutdown command is sent to the fuel cell system, and the idle speed reference power is determined to be the vehicle's requested power. The vehicle's operating mode is then switched to pure electric mode to shut down the fuel cell stack.

[0078] It should be noted that the fuel cell stack is the component of the fuel cell that generates electrical energy through electrochemical reactions, and it is the unit for the energy output of the entire vehicle.

[0079] It should be understood that upon entering the fuel cell electric management mode, a shutdown command is first sent to the fuel cell, triggering the stack shutdown process. The idle speed reference power is then set as the vehicle's requested power, completing the power parameter setting. The vehicle operating mode is switched to pure electric mode, and the stack shutdown operation is completed through the coordination of commands and mode switching.

[0080] This embodiment provides a fuel cell system control method. By jointly determining multiple conditions to enter the fuel cell-electric management mode, it ensures that the vehicle initiates fuel cell-related controls when safety and power requirements are met, improving the rationality and stability of mode activation. In fuel cell-electric management mode, sending a shutdown command, setting the power, and switching to pure electric mode allows for the safe shutdown of the fuel cell stack when it is not needed, ensuring the orderly management of the vehicle's energy.

[0081] For example, to help understand the implementation flow of the fuel cell system control method obtained by combining this embodiment with the above embodiment one, please refer to... Figure 3 , Figure 3 A simplified flowchart of a fuel cell system control method is provided, specifically: When the key is turned on, the vehicle controller wakes up and executes the high-voltage process for pure electric driving. The VCU wakes up the fuel cell system controller and high-voltage management system (HMS) through the low-voltage relay. After the FCU wakes up, it performs pre-stack preparation work, receives the stack control status command (VCU_cmdFCU) from the VCU, and sends the FCU running status FCU_RunSts to the VCU to indicate whether the FCU can enter the idle speed control mode and the idle speed control status, and monitors the stack system running status FCU_Sts.

[0082] The system checks if the following conditions are met simultaneously: the vehicle is in a ready state (VCU_ReadyStatus value is 1, indicating that the pure electric high-voltage power-on is complete); the remaining battery charge (bmsSoc) is less than 80%; the electric vehicle (EV) switch status is 0 (invalid); and the FCU communication timeout status is 0 (no timeout). If any one of these conditions is not met, the relevant checks continue. If all conditions are met, the VCU enters the fuel cell electric management mode. In fuel cell electric management mode, an initial shutdown command (VCU_cmdFCU=0) is sent to the FCU to shut down the fuel cell stack, the requested power is set to 0 (VCU_DemandPower=0), and the vehicle operating mode is set to pure electric mode (VCU_RunningMode=0).

[0083] Next, the value of FCU_Sts, representing the operating status of the fuel cell stack system, is checked to see if it meets any of the following conditions: FCU_Sts=0 (Ready standby), FCU_Sts=1 (starting up), FCU_Sts=2 (running), or FCU_Sts=7 (power-on self-test). If none of these conditions are met, it indicates that the fuel cell stack system is not in a legal state suitable for startup, i.e., it is in an abnormal state. In this case, the startup termination processing box is entered to perform fault handling. The VCU controls the shutdown of the fuel cell stack, sends a shutdown command to the FCU (VCU_cmdFCU=0), and sets the requested power to 0 (VCU_DemandPower=0) to terminate the fuel cell operation and ensure system safety.

[0084] If FCU_Sts=2 (indicating operation), it means the FCU has entered the operating state and enters the startup completion processing frame. The VCU maintains the startup command (VCU_cmdFCU=1), maintains the actual power output demand (VCU_DemandPower=actual demand), and simultaneously switches the vehicle operating mode to hybrid mode (VCU_RunningMode=1). At this time, the fuel cell begins to participate in power output, driving the vehicle together with the power battery. In this case, if the remaining SOC of the power battery is greater than 80%, it indicates that the prerequisite for triggering the fuel cell to enter the low-power mode is met. To avoid overcharging the power battery and reduce unnecessary power consumption of the fuel cell, it checks whether the FCU allows entry into the idle speed control mode (0 represents that it can enter idle speed) to confirm the execution permission of the idle speed mode.

[0085] If entry into idle control mode is permitted, the VCU triggers the idle control procedure, sending an idle entry command (send idle control mode = 1), simultaneously releasing minimum power control (minimum power control mode = 0), setting the requested power to 0 (VCU_DemandPower = 0), causing the fuel cell to enter an idle shutdown state, maintaining only minimum operating power consumption and not outputting power externally. In idle control mode, if the remaining SOC of the power battery is less than 75%, the conditions for releasing the idle control preparation mode are triggered. At this time, the VCU enters the release preparation mode, sending commands to release idle control (idle control mode = 0) and release minimum power control (minimum power control mode = 0), with the requested power still set to 0, preparing to restore normal power output until the FCU completes idle shutdown (FCU idle control state = 2), returning to the VCU to maintain the start-up command (VCU_cmdFCU = 1), maintaining the actual demand power output (VCU_DemandPower = actual demand), and simultaneously switching the vehicle operating mode to hybrid mode (VCU_RunningMode = 1).

[0086] If the FCU prohibits entry into idle control mode (FCU allows entry into idle control mode == 1), or if it detects that the FCU prohibits entry into idle control mode (allow entry into idle control mode == 1) during idle control mode, the VCU triggers the minimum power control procedure, sends a release idle command (idle control mode = 0), and enters minimum power control (minimum power control mode = 1), setting the requested power to 0 (VCU_DemandPower = 0) to maintain minimum power operation of the fuel cell, preventing it from outputting effective power. In minimum power control mode, if the battery charge further increases (e.g., SOC > 85%) and the FCU allows entry into idle control mode (e.g., FCU allows entry into idle control mode == 0), it switches back to idle control mode. In minimum power control mode, if the remaining battery charge (SOC) is less than 75%, it enters the start-up completion processing frame.

[0087] If any of the following conditions are met: FCU_Sts=0 (indicating Ready standby), FCU_Sts=1 (indicating startup), or FCU_Sts=7 (indicating power-on self-test), a startup command (VCU_cmdFCU=1) is sent to start the fuel cell stack, requesting the actual driving power demand (VCU_DemandPower=actual demand kW). The vehicle operating mode remains in pure electric mode (VCU_RunningMode=0). At this time, the fuel cell is starting, and the power is still provided by the battery. If the FCU enters the startup (FCU_Sts=1) or running (FCU_Sts=2) state within the 60-second timeout window, the startup is confirmed to be complete, and the startup completion processing box is entered. If the FCU does not enter the startup (FCU_Sts=1) or running (FCU_Sts=2) state within the 60-second timeout window, the startup timeout is determined, and the startup termination processing box is entered to perform fault handling to shut down the fuel cell stack.

[0088] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the fuel cell system control method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0089] This application also provides a fuel cell system control device, please refer to... Figure 4 The fuel cell system control device includes: Data acquisition module 10 is used to acquire vehicle operating mode, remaining power battery charge, idling allowable status of fuel cell system and stack system operating status in fuel cell management mode; The mode switching module 20 is used to determine the vehicle's requested power when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than a first power threshold, and to determine the target control mode based on the idling allowable state of the fuel cell system and the idling control mode or target power mode. The system control module 30 is used to control the fuel cell system according to the requested power of the vehicle and the target control mode.

[0090] In one embodiment, the mode switching module 20 is further configured to send a stack start command to the fuel cell system when the stack system is in the operating state, switch the vehicle operating mode to hybrid mode, and determine the vehicle demand power as the vehicle request power. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is allowed to enter idle mode, the idle control mode is determined to be the target control mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is not allowed to enter idle mode, the target power mode is determined as the target control mode.

[0091] In one embodiment, the mode switching module 20 is further configured to send a stack start command to the fuel cell system when the stack system is in any one of the ready state, the startup state, the power-on self-test state, and the operating state, switch the vehicle operating mode to pure electric mode, and determine the vehicle demand power as the vehicle requested power. If the fuel cell system is determined to be in the startup state or in operation state within the preset timeout period of sending the startup command, the vehicle operation mode is switched to hybrid mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is allowed to enter idle mode, the idle control mode is determined to be the target control mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is not allowed to enter idle mode in idle control mode, the target power mode is determined as the target control mode.

[0092] In one embodiment, the system control module 30 is further configured to determine the idle speed reference power as the vehicle's requested power in the target power mode, so as to control the fuel cell system; When the remaining charge of the power battery is less than the second charge threshold, the required power of the vehicle is determined as the requested power of the vehicle, and the process returns to the step of determining the required power of the vehicle as the requested power of the vehicle when the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and determining the idle speed control mode or target power mode as the target control mode based on the idle speed allowable state of the fuel cell system, wherein the second charge threshold is less than the first charge threshold; When the remaining charge of the power battery is greater than the third charge threshold and the idling allowable state of the fuel cell system is allowed to enter idling, the vehicle demand power is determined to be the vehicle requested power, and the idling control mode is determined to be the target control mode, wherein the third charge threshold is greater than the first charge threshold; The fuel cell system is controlled according to the requested power of the vehicle and the target control mode.

[0093] In one embodiment, the system control module 30 is further configured to determine the idle speed reference power as the vehicle's requested power in the idle speed control mode, so as to control the fuel cell system; After determining the idle speed reference power as the vehicle's requested power in the idle speed control mode to control the fuel cell system, the following steps are included: When the remaining power of the power battery is less than the second power threshold, the idle speed control mode is deactivated, and the idle speed stop status is detected. When the idle stop state is completed, return to the step of determining the vehicle's required power as the vehicle's requested power when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than the first power threshold, and determine the idle control mode or target power mode as the target control mode based on the idle allowable state of the fuel cell system.

[0094] In one embodiment, the system control module 30 is further configured to enter the fuel cell management mode when the vehicle is in a ready state, the remaining power of the power battery is less than or equal to a first power threshold, the pure electric drive switch is in a closed state, and the fuel cell system communication status is in a non-timeout state. In the fuel cell electric management mode, a shutdown command is sent to the fuel cell system, and the idle speed reference power is determined as the vehicle's requested power. The vehicle's operating mode is then switched to pure electric mode to shut down the fuel cell system's stack.

[0095] In one embodiment, the system control module 30 is further configured to send a shutdown command to the fuel cell system when the operating state of the fuel cell stack system is not a preset state, and determine the idle speed reference power as the vehicle's requested power, so as to shut down the fuel cell stack of the fuel cell system.

[0096] The fuel cell system control device provided in this application, employing the fuel cell system control method in the above embodiments, can solve the technical problem of how to reduce unnecessary stack start-ups and shutdowns and extend fuel cell lifespan. Compared with the prior art, the beneficial effects of the fuel cell system control device provided in this application are the same as those of the fuel cell system control method provided in the above embodiments, and other technical features in the fuel cell system control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0097] This application provides a fuel cell system control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the fuel cell system control method in Embodiment 1 above.

[0098] The following is for reference. Figure 5 The diagram illustrates a structural schematic suitable for implementing a fuel cell system control device according to embodiments of this application. The fuel cell system control device in embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 5 The fuel cell system control device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments of this application.

[0099] like Figure 5As shown, the fuel cell system control device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in ROM (Read Only Memory) 1002 or a program loaded from storage device 1003 into RAM (Random Access Memory) 1004. RAM 1004 also stores various programs and data required for the operation of the fuel cell system control device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via bus 1005. Input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touch screens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, LCDs (Liquid Crystal Displays), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the fuel cell system control equipment to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a fuel cell system control equipment with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems may be implemented alternatively.

[0100] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0101] The fuel cell system control device provided in this application, employing the fuel cell system control method described in the above embodiments, can solve the technical problem of how to reduce unnecessary stack start-ups and shutdowns and extend fuel cell lifespan. Compared with the prior art, the beneficial effects of the fuel cell system control device provided in this application are the same as those of the fuel cell system control method provided in the above embodiments, and other technical features of this fuel cell system control device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0102] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0103] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0104] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the fuel cell system control method in the above embodiments.

[0105] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, RAM (Random Access Memory), ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory), or flash memory, optical fiber, CD-ROM (CD-Read Only Memory), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0106] The aforementioned computer-readable storage medium may be included in the fuel cell system control device; or it may exist independently and not be assembled into the fuel cell system control device.

[0107] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the fuel cell system control device, cause the fuel cell system control device to: acquire the vehicle operating mode, the remaining power battery charge, the fuel cell system idle speed allowable state, and the stack system operating state in a fuel cell power management mode; when the stack system operating state is a preset state, and the vehicle operating mode is a hybrid mode, and the remaining power battery charge is greater than a first charge threshold, determine the vehicle's requested power, and determine the idle speed control mode or target power mode as the target control mode based on the fuel cell system idle speed allowable state; and control the fuel cell system according to the vehicle's requested power and the target control mode.

[0108] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including LAN (Local Area Network) or WAN (Wide Area Network)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0109] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0110] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0111] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described fuel cell system control method. This addresses the technical problem of reducing unnecessary fuel cell stack start-ups and shutdowns and extending fuel cell lifespan. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the fuel cell system control method provided in the above embodiments, and will not be elaborated upon here.

[0112] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the fuel cell system control method described above.

[0113] The computer program product provided in this application can solve the technical problem of how to reduce unnecessary fuel cell stack start-ups and shutdowns and extend fuel cell life. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the fuel cell system control method provided in the above embodiments, and will not be repeated here.

[0114] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A control method for a fuel cell system, characterized in that, The fuel cell system control method includes: Under the fuel cell management mode, the vehicle operating mode, the remaining power battery charge, the idling speed allowable status of the fuel cell system, and the operating status of the fuel cell stack system are obtained. When the fuel cell stack system is in a preset operating state, and the vehicle is in hybrid mode and the remaining power of the power battery is greater than a first power threshold, the requested power of the vehicle is determined, and the target control mode is determined based on the idling allowable state of the fuel cell system and the idling control mode or target power mode. The fuel cell system is controlled according to the requested power of the vehicle and the target control mode.

2. The method as described in claim 1, characterized in that, The preset state includes the running state; The step of determining the vehicle's requested power and, based on the fuel cell system's idle speed allowable state and determining the idle speed control mode or target power mode as the target control mode, when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than a first power threshold, includes: When the stack system is in the operating state, a stack start command is sent to the fuel cell system to switch the vehicle operating mode to hybrid mode and determine the vehicle's required power as the vehicle's requested power. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is allowed to enter idle mode, the idle control mode is determined to be the target control mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is not allowed to enter idle mode, the target power mode is determined as the target control mode.

3. The method as described in claim 1, characterized in that, The preset states include ready state, startup state, power-on self-test state, and running state; The step of determining the vehicle's requested power and, based on the fuel cell system's idle speed allowable state and determining the idle speed control mode or target power mode as the target control mode, when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than a first power threshold, includes: When the stack system is in any of the following states: ready, startup, power-on self-test, and operation, a stack start command is sent to the fuel cell system to switch the vehicle operation mode to pure electric mode and determine the vehicle's required power as the vehicle's requested power. If the fuel cell system is determined to be in the startup state or in operation state within the preset timeout period of sending the startup command, the vehicle operation mode is switched to hybrid mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is allowed to enter idle mode, the idle control mode is determined to be the target control mode. When the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and the fuel cell system is not allowed to enter idle mode in idle control mode, the target power mode is determined as the target control mode.

4. The method as described in claim 1, characterized in that, The step of controlling the fuel cell system according to the requested power of the vehicle and the target control mode includes: In the target power mode, the idle speed reference power is determined as the vehicle's requested power to control the fuel cell system; When the remaining charge of the power battery is less than the second charge threshold, the required power of the vehicle is determined as the requested power of the vehicle, and the process returns to the step of determining the required power of the vehicle as the requested power of the vehicle when the vehicle is in hybrid mode and the remaining charge of the power battery is greater than the first charge threshold, and determining the idle speed control mode or target power mode as the target control mode based on the idle speed allowable state of the fuel cell system, wherein the second charge threshold is less than the first charge threshold; When the remaining charge of the power battery is greater than the third charge threshold and the idling allowable state of the fuel cell system is allowed to enter idling, the vehicle demand power is determined to be the vehicle requested power, and the idling control mode is determined to be the target control mode, wherein the third charge threshold is greater than the first charge threshold; The fuel cell system is controlled according to the requested power of the vehicle and the target control mode.

5. The method as described in claim 1, characterized in that, The step of controlling the fuel cell system according to the requested power of the vehicle and the target control mode includes: In the idle speed control mode, the idle speed reference power is determined as the vehicle's requested power to control the fuel cell system; After determining the idle speed reference power as the vehicle's requested power in the idle speed control mode to control the fuel cell system, the following steps are included: When the remaining power of the power battery is less than the second power threshold, the idle speed control mode is deactivated, and the idle speed stop status is detected. When the idle stop state is completed, return to the step of determining the vehicle's required power as the vehicle's requested power when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than the first power threshold, and determine the idle control mode or target power mode as the target control mode based on the idle allowable state of the fuel cell system.

6. The method as described in claim 1, characterized in that, Before the step of obtaining the vehicle operating mode, remaining battery charge, and idling allowable status of the fuel cell system in the fuel cell management mode, the method further includes: When the vehicle is in a ready state, the remaining power battery charge is less than or equal to the first power threshold, the pure electric drive switch is in the off state, and the fuel cell system communication status is in the non-timeout state, the vehicle enters the fuel cell management mode. In the fuel cell electric management mode, a shutdown command is sent to the fuel cell system, and the idle speed reference power is determined as the vehicle's requested power. The vehicle's operating mode is then switched to pure electric mode to shut down the fuel cell system's stack.

7. The method as described in claim 1, characterized in that, Following the steps of obtaining the vehicle operating mode, remaining battery charge, fuel cell system idle speed allowable status, and stack system operating status under the fuel cell management mode, the method further includes: If the stack system is not in the preset operating state, a shutdown command is sent to the fuel cell system, and the idle speed reference power is determined to be the vehicle's requested power, so as to shut down the fuel cell stack.

8. A control device for a fuel cell system, characterized in that, The device includes: The data acquisition module is used to acquire the vehicle operating mode, the remaining power battery charge, the idling allowable status of the fuel cell system, and the operating status of the fuel cell stack system in the fuel cell management mode. The mode switching module is used to determine the vehicle's requested power when the vehicle's operating mode is hybrid mode and the remaining power of the power battery is greater than a first power threshold, and to determine the target control mode based on the idling allowable state of the fuel cell system and the idling control mode or target power mode. The system control module is used to control the fuel cell system according to the requested power of the vehicle and the target control mode.

9. A control device for a fuel cell system, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the fuel cell system control method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the fuel cell system control method as described in any one of claims 1 to 7.

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