Fuel cell automobile fan control method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a fuel cell automobile fan control method and device, electronic equipment and a storage medium, and relates to the technical field of fuel cell automobiles. The method is applied to a controller, and the controller is in communication connection with a radiator, a fan and a plurality of temperature sensors. The method comprises the following steps: determining the heat production capacity of the galvanic pile, and respectively acquiring the environment temperature and the outlet temperature of a radiator based on each temperature sensor. And determining the total heat dissipation demand quantity according to the stack heat production quantity, the environment temperature and the radiator outlet temperature. And a target fan duty ratio is determined based on the total heat dissipation demand quantity, and the running state of the fan is controlled according to the target fan duty ratio. The vehicle can be more reasonably cooled through the fan.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell vehicles, and in particular to a fan control method, device, electronic equipment and storage medium for a fuel cell vehicle. Background Art

[0002] The fan is an important heat dissipation device in fuel cell vehicles. When the car is driving at high speed, it is very important to achieve rapid heat dissipation of the car through precise control of the fan and combination with other heat dissipation devices.

[0003] In the prior art, the heat dissipation strategies of fuel cell vehicles are mostly aimed at liquid cooling equipment such as radiators, while the control of the fan can often only work according to the preset full-speed operation mode, and it is impossible to more reasonably exert the heat dissipation effect of the fan. Summary of the invention

[0004] The objectives of the present invention include, for example, providing a fuel cell vehicle fan control method, device, electronic device and storage medium, which can at least partially solve the above-mentioned technical problems.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, an embodiment of the present invention provides a method for controlling a fan of a fuel cell vehicle, which is applied to a controller, wherein the controller is communicatively connected with a radiator, a fan, and a plurality of temperature sensors; the method comprises:

[0007] Determine the heat generation of the battery stack, and obtain the ambient temperature and the radiator outlet temperature based on each of the temperature sensors;

[0008] Determining a total heat dissipation requirement according to the heat generation of the battery stack, the ambient temperature, and the radiator outlet temperature;

[0009] A target fan duty cycle is determined based on the total heat dissipation demand, and an operating state of the fan is controlled according to the target fan duty cycle.

[0010] Optionally, the method further comprises:

[0011] When the vehicle is in a deceleration state, obtaining noise information of the vehicle in real time;

[0012] Determining whether the noise information is greater than a preset noise information limit;

[0013] If so, the target fan duty cycle is lowered according to the target strategy, and the operating state of the fan is controlled according to the lowered target fan duty cycle.

[0014] Optionally, the method further comprises:

[0015] Obtaining the speed of the vehicle, and determining whether the speed is zero;

[0016] If yes, obtain the water temperature at the outlet of the battery stack, and determine the idle fan control duty cycle according to the water temperature at the outlet of the battery stack;

[0017] The idle fan control duty cycle is used as the target fan duty cycle.

[0018] Optionally, determining the total heat dissipation requirement according to the heat generation of the battery stack, the ambient temperature and the radiator outlet temperature includes:

[0019] Determining a first heat dissipation requirement according to the ambient temperature and the heat generated by the fuel cell stack;

[0020] Determining a second heat dissipation requirement according to a radiator outlet temperature threshold and the radiator outlet temperature;

[0021] The total heat dissipation requirement is obtained by combining the first heat dissipation requirement and the second heat dissipation requirement.

[0022] Optionally, the method further comprises:

[0023] determining whether the sum of the first heat dissipation requirement and the second heat dissipation requirement is greater than the heat dissipation requirement of the vehicle air conditioner;

[0024] If not, the vehicle air conditioning heat dissipation demand is determined as the total heat dissipation demand.

[0025] Optionally, controlling the operating state of the fan according to the target fan duty cycle includes:

[0026] Determining a target fan duty cycle interval in which the target fan duty cycle is located from a plurality of fan duty cycle intervals;

[0027] The operating state of the fan is controlled based on a control strategy corresponding to the target fan duty cycle interval.

[0028] Optionally, the method further comprises:

[0029] Determining whether the target fan duty cycle is greater than a preset duty cycle threshold;

[0030] If so, a fan heat dissipation fault signal is generated, and a corresponding alarm device is controlled to send out an alarm signal based on the fan heat dissipation fault signal.

[0031] In a second aspect, an embodiment of the present invention provides a fuel cell vehicle fan control device, which is applied to a controller, wherein the controller is communicatively connected with a radiator, a fan, and a plurality of temperature sensors; the fuel cell vehicle fan control device comprises:

[0032] A parameter acquisition unit, used to determine the heat generation of the battery stack, and to acquire the ambient temperature and the radiator outlet temperature respectively based on the temperature sensors;

[0033] a total heat dissipation demand determination unit, configured to determine the total heat dissipation demand according to the heat generation of the battery stack, the ambient temperature, and the radiator outlet temperature;

[0034] A fan control unit is used to determine a target fan duty cycle based on the total heat dissipation demand, and control the operating state of the fan according to the target fan duty cycle.

[0035] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above methods when executing the program.

[0036] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a computer program, and when the computer program is executed, the server where the computer-readable storage medium is located is controlled to implement the steps of any one of the above methods.

[0037] The beneficial effects of the embodiments of the present invention include, for example:

[0038] The temperature sensor obtains the ambient temperature and the radiator outlet temperature, and determines the heat generation of the fuel cell stack. The total heat dissipation demand is determined by the heat generation of the fuel cell stack, the ambient temperature, and the radiator outlet temperature. Then, the target fan duty cycle is determined according to the total heat dissipation demand to control the fan's operating status in real time. This achieves precise control of the fuel cell vehicle fan and effectively and reasonably exerts the fan's heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A block diagram of an electronic device provided by an embodiment of the present invention;

[0041] Figure 2 A flowchart of a fan control method for a fuel cell vehicle provided by an embodiment of the present invention;

[0042] Figure 3 A flow chart of a fuel cell vehicle fan control method provided by an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of a fan control device for a fuel cell vehicle provided in an embodiment of the present invention.

[0044] Icons: 100 - electronic device; 110 - memory; 120 - processor; 130 - communication module; 300 - fuel cell vehicle fan control device; 301 - parameter acquisition unit; 302 - total heat dissipation demand determination unit; 303 - fan control unit. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0048] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0049] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0050] In high temperature environments, when a fuel cell vehicle is driving, especially when it is at high power output, the stack system will generate intense heat, causing the radiator outlet temperature to rise rapidly. To ensure that the stack cooling water outlet temperature remains below the safety threshold of 75°C, when the temperature reaches 69°C or above, the main radiator electronic fan will start full speed operation.

[0051] However, when the outlet temperature of the stack cooling water is low, the fan may be needed to dissipate heat, but it is not necessary to turn the fan speed to full speed. In the prior art, the fan is often controlled to run at full speed as long as it is turned on, which obviously wastes the fan heat dissipation resources when the outlet temperature of the stack cooling water is low.

[0052] Based on the above situation, the embodiments of the present invention provide a fuel cell vehicle fan control method, device, electronic device and storage medium, which can effectively alleviate the above technical problems.

[0053] Please refer to Figure 1 , is a block diagram of an electronic device 100 provided by the present application. The electronic device 100 may be a device capable of performing data processing, which is not limited in this embodiment. The electronic device 100 includes a memory 110, a processor 120, and a communication module 130. The memory 110, the processor 120, and the communication module 130. Each component is electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses or signal lines.

[0054] The memory 110 is used to store programs or data. The memory 110 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc.

[0055] The processor 120 is used to read / write data or programs stored in the memory and execute corresponding functions.

[0056] The communication module 130 is used to establish a communication connection between the server and other communication terminals through the network, and to send and receive data through the network.

[0057] It should be understood that Figure 1 The structure shown is only a schematic diagram of the structure of the electronic device 100. The electronic device 100 may also include Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown. Figure 1 The components shown in the figure can be implemented by hardware, software or a combination thereof. The electronic device 100 can be arranged in other devices or as an independent device.

[0058] An embodiment of the present invention provides a method for controlling a fan of a fuel cell vehicle, which is applied to a controller, wherein the controller is communicatively connected to a radiator, a fan, and a plurality of temperature sensors. The method includes: Figure 2 The following steps are shown:

[0059] Step S110: determining the heat generation of the battery stack, and obtaining the ambient temperature and the radiator outlet temperature based on the temperature sensors.

[0060] Step S120: determining a total heat dissipation requirement according to the heat generation of the fuel cell stack, the ambient temperature, and the radiator outlet temperature.

[0061] Step S130: determining a target fan duty cycle based on the total heat dissipation demand, and controlling the operating state of the fan according to the target fan duty cycle.

[0062] In step S110, the heat generation of the fuel cell stack is determined, and based on the temperature sensors, the ambient temperature and the radiator outlet temperature are respectively acquired.

[0063] The output power of a fuel cell is the part of it that converts chemical energy into electrical energy, and the heat generated is the heat lost by the fuel cell during operation that cannot be converted into electrical energy. Therefore, the heat generated by the stack can be calculated by the hydrogen consumption of the stack and the output power of the fuel cell. The consumption rate and molar mass of hydrogen are calculated to obtain the hydrogen consumption. Finally, the heat generated by the stack is calculated using the law of conservation of energy.

[0064] The ambient temperature can be obtained by a temperature sensor installed outside the fuel cell, and the radiator outlet temperature can be obtained by a temperature sensor installed at the radiator cooling water outlet.

[0065] In step S120, the total heat dissipation requirement is determined according to the heat generation of the fuel cell stack, the ambient temperature and the radiator outlet temperature.

[0066] After obtaining the ambient temperature and the radiator outlet temperature, the heat production corresponding to the ambient temperature and the radiator outlet temperature can be determined by table lookup or temperature conversion. Combining this heat production with the heat production of the battery stack will give the total heat dissipation demand.

[0067] Optionally, determining the total heat dissipation requirement according to the heat generation of the battery stack, the ambient temperature and the radiator outlet temperature includes:

[0068] A first heat dissipation requirement is determined according to the ambient temperature and the heat generated by the fuel cell stack.

[0069] The second heat dissipation requirement is determined according to the radiator outlet temperature threshold and the radiator outlet temperature.

[0070] The total heat dissipation requirement is obtained by combining the first heat dissipation requirement and the second heat dissipation requirement.

[0071] As an optional implementation, the ambient temperature can be collected by a resistive temperature sensor arranged next to the radiator, and the preset correspondence table shown in Table 1 can be checked based on the ambient temperature to determine the heat dissipation demand corresponding to the current ambient temperature, which is then integrated with the heat generation of the battery stack to obtain the first heat dissipation demand.

[0072] The heat dissipation demand corresponding to the difference between the radiator outlet temperature threshold and the radiator outlet temperature is determined as the second heat dissipation demand. The first heat dissipation demand and the second heat dissipation demand are added to obtain a total heat dissipation demand.

[0073] Table 1

[0074]

[0075]

[0076] Optionally, the method further comprises:

[0077] It is determined whether the sum of the first heat dissipation requirement and the second heat dissipation requirement is greater than the vehicle air conditioning heat dissipation requirement. If not, the vehicle air conditioning heat dissipation requirement is determined as the total heat dissipation requirement.

[0078] Furthermore, since the cooling demand of the vehicle's air conditioning is also performed by the fan, the priority of fan cooling can be determined between the sum of the first cooling demand, the second cooling demand and the vehicle's air conditioning cooling demand. If the sum of the first cooling demand and the second cooling demand is greater than the current vehicle air conditioning cooling demand, it is considered that the cooling priority of the current fuel cell is higher, and the sum of the first cooling demand and the second cooling demand is determined as the total cooling demand, and the fan is controlled to preferentially meet the cooling demand. Otherwise, it is considered that the cooling demand of the vehicle's air conditioning has a higher priority, and the cooling demand of the vehicle's air conditioning is determined as the total cooling demand, and the fan is controlled to preferentially perform.

[0079] In step S130, a target fan duty cycle is determined based on the total heat dissipation demand, and the operation state of the fan is controlled according to the target fan duty cycle.

[0080] After the total heat dissipation demand is determined, the corresponding target fan duty cycle can be obtained by looking up the total heat dissipation demand in a preset relationship table between the total heat dissipation demand and the target fan duty cycle.

[0081] In the embodiment of the present invention, there can be one fan or more than one fan. When there is one fan, the target fan duty cycle is the actual speed ratio of the fan; when there are more than one fan, the target fan duty cycle is the ratio achieved by the combined action of the multiple fans, that is, the speeds of the fans can be the same or different, but the final effect is considered to be the same.

[0082] Optionally, controlling the operating state of the fan according to the target fan duty cycle includes:

[0083] A target fan duty cycle interval in which the target fan duty cycle is located is determined from a plurality of fan duty cycle intervals.

[0084] The operating state of the fan is controlled based on a control strategy corresponding to the target fan duty cycle interval.

[0085] In an optional implementation, if there are multiple fans, multiple fan duty cycle intervals can be set, and the fan duty cycle intervals are arranged in order from small to large, and a control strategy is set corresponding to each fan duty cycle interval. After obtaining the target fan duty cycle, the target fan duty cycle interval in which the target fan duty cycle is located is determined from multiple fan duty cycle intervals, and the control strategy corresponding to the target fan duty cycle interval is used to control the operating state (i.e., the speed) of each fan.

[0086] For example, multiple fan duty cycle intervals are 0% to 15%, 15% to 30%, 30% to 50%, 50% to 70%, 70% to 90%, and 90% to 100%. If the fan duty cycle is 20%, 15% to 30% is determined as the target fan duty cycle interval, and the control strategy corresponding to the target fan duty cycle interval is to control the main fan in the fan to run at 40% of the maximum speed, and other fans to run at 15% of the maximum speed, and then control each fan at the corresponding speed.

[0087] Optionally, the method further comprises:

[0088] When the vehicle is in a deceleration state, noise information of the vehicle is acquired in real time, and it is determined whether the noise information is greater than a preset noise information limit.

[0089] If so, the target fan duty cycle is lowered according to the target strategy, and the operating state of the fan is controlled according to the lowered target fan duty cycle.

[0090] During the deceleration process of the vehicle, as the background noise such as engine noise decreases, the main radiator fan noise becomes the main noise source. In order to reduce the noise of the vehicle, the noise information of the vehicle (such as the decibel level inside the vehicle) can be obtained when the vehicle is in a deceleration state. Determine whether the current noise information is greater than the preset noise information limit. If the noise information is greater than the preset noise information limit, in order to provide users with a better driving and riding experience, the target fan duty cycle can be lowered according to the target strategy, and the fan operation state can be controlled according to the lowered target fan duty cycle.

[0091] For example, when the vehicle decelerates, the total heat dissipation demand will decrease, so the target fan duty cycle at this time tends to decrease. However, if the noise information at this time is greater than the preset noise information limit, the decrease rate of the target fan duty cycle can be further increased according to the set acceleration, thereby achieving the effect of quickly reducing the noise inside the vehicle.

[0092] Optionally, the method further includes: acquiring a vehicle speed, and determining whether the vehicle speed is zero.

[0093] If yes, the water temperature at the outlet of the stack is obtained, and the idle fan control duty cycle is determined according to the water temperature at the outlet of the stack, and the idle fan control duty cycle is used as the target fan duty cycle.

[0094] As an optional implementation, the vehicle speed can be obtained in real time. When the vehicle speed is 0 km / h, it means that the vehicle is in an idle state. The stack outlet water temperature is obtained, and the corresponding idle fan control duty cycle is obtained by looking up the stack outlet water temperature table, and the duty cycle is used as the target fan duty cycle to control the operation of the fan.

[0095] Optionally, the method further includes: determining whether the target fan duty cycle is greater than a preset duty cycle threshold.

[0096] If so, a fan heat dissipation fault signal is generated, and a corresponding alarm device is controlled to send out an alarm signal based on the fan heat dissipation fault signal.

[0097] If the target fan duty cycle calculated by the controller is greater than the preset duty cycle threshold, it is considered that the current total heat dissipation demand is greater than the heat dissipation effect generated by the maximum fan speed, that is, the fan cannot meet the heat dissipation demand at this time. At this time, a fan heat dissipation fault signal will be generated, and the corresponding alarm device (such as the corresponding fault signal light on the instrument panel, alarm voice reminder, etc.) will be controlled based on the fan heat dissipation fault signal to send an alarm signal to remind the user of the fault.

[0098] In order to better explain the embodiments of the present invention, this specification also provides Figure 3 The flowchart shown is used to explain the scheme of the embodiment of the present invention.

[0099] See also Figure 3 First, the first heat dissipation requirement is determined according to the heat generation of the battery stack and the ambient temperature, and the second heat dissipation requirement is determined according to the difference between the radiator outlet temperature and the radiator outlet temperature threshold. The first heat dissipation requirement and the second heat dissipation requirement are combined to determine the sum of the first heat dissipation requirement and the second heat dissipation requirement and the vehicle air conditioning heat dissipation requirement, and the larger one is taken as the total heat dissipation requirement.

[0100] When the vehicle is not in a deceleration or parking state, the target fan duty cycle is determined according to the total heat dissipation demand, and the fan speed is controlled to achieve the heat dissipation effect. When the vehicle is in a deceleration state, the decrease rate of the target fan duty cycle is adjusted according to the noise information of the vehicle, so as to reduce the fan speed more quickly and reduce the vehicle noise. When the vehicle is in a parking state (that is, the speed is 0), the water temperature at the outlet of the battery stack is obtained, and the idle fan control duty cycle is obtained by looking up the table of the water temperature at the outlet of the battery stack, and it is used as the target fan duty cycle to control the fan speed.

[0101] Based on the same inventive concept, Figure 4 As shown, the embodiment of the present invention provides a fuel cell vehicle fan control device 300, which is applied to a controller, and the controller is communicatively connected with a radiator, a fan, and a plurality of temperature sensors. The fuel cell vehicle fan control device 300 includes:

[0102] The parameter acquisition unit 301 is used to determine the heat generation of the battery stack and obtain the ambient temperature and the radiator outlet temperature based on each of the temperature sensors.

[0103] The total heat dissipation requirement determination unit 302 is used to determine the total heat dissipation requirement according to the heat generation of the fuel cell stack, the ambient temperature and the radiator outlet temperature.

[0104] The fan control unit 303 is used to determine a target fan duty cycle based on the total heat dissipation demand, and control the operating state of the fan according to the target fan duty cycle.

[0105] Regarding the above-mentioned fuel cell vehicle fan control device 300, the specific functions of each unit therein have been described in detail in the embodiment of the fuel cell vehicle fan control method provided in this specification, and will not be elaborated here.

[0106] Based on the same inventive concept, an embodiment of the present invention specification provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above-mentioned fuel cell vehicle fan control methods.

[0107] The present invention has at least the following beneficial effects:

[0108] 1. The ambient temperature and radiator outlet temperature are obtained through the temperature sensor, and the heat generation of the fuel cell stack is determined. The total heat dissipation demand is determined by the heat generation of the fuel cell stack, the ambient temperature and the radiator outlet temperature. Then, the target fan duty cycle is determined according to the total heat dissipation demand to control the fan's operating status in real time. Accurate control of the fuel cell vehicle fan is achieved, and the fan's heat dissipation effect is effectively and reasonably exerted.

[0109] 2. By adjusting the fan duty cycle when the vehicle is decelerating and parking, the noise decibels inside the vehicle are reduced, giving users a better car experience.

[0110] In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0111] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0112] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0113] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for controlling a fan of a fuel cell vehicle, characterized in that: Applied to a controller, the controller is communicatively connected with a radiator, a fan and a plurality of temperature sensors; the method comprises: Determine the heat generation of the battery stack, and obtain the ambient temperature and the radiator outlet temperature based on each of the temperature sensors; Determining a total heat dissipation requirement according to the heat generation of the battery stack, the ambient temperature, and the radiator outlet temperature; A target fan duty cycle is determined based on the total heat dissipation demand, and an operating state of the fan is controlled according to the target fan duty cycle.

2. The fuel cell vehicle fan control method according to claim 1, characterized in that: The method further comprises: When the vehicle is in a deceleration state, obtaining noise information of the vehicle in real time; Determining whether the noise information is greater than a preset noise information limit; If so, the target fan duty cycle is lowered according to the target strategy, and the operating state of the fan is controlled according to the lowered target fan duty cycle.

3. The fuel cell vehicle fan control method according to claim 1, characterized in that: The method further comprises: Obtaining the speed of the vehicle, and determining whether the speed is zero; If yes, obtain the water temperature at the outlet of the battery stack, and determine the idle fan control duty cycle according to the water temperature at the outlet of the battery stack; The idle fan control duty cycle is used as the target fan duty cycle.

4. The fuel cell vehicle fan control method according to claim 1, characterized in that: The determining of the total heat dissipation requirement according to the heat generation of the battery stack, the ambient temperature and the radiator outlet temperature includes: Determining a first heat dissipation requirement according to the ambient temperature and the heat generated by the fuel cell stack; Determining a second heat dissipation requirement according to a radiator outlet temperature threshold and the radiator outlet temperature; The total heat dissipation requirement is obtained by combining the first heat dissipation requirement and the second heat dissipation requirement.

5. The fuel cell vehicle fan control method according to claim 4, characterized in that: The method further comprises: determining whether the sum of the first heat dissipation requirement and the second heat dissipation requirement is greater than the heat dissipation requirement of the vehicle air conditioner; If not, the vehicle air conditioning heat dissipation demand is determined as the total heat dissipation demand.

6. The fuel cell vehicle fan control method according to claim 4, characterized in that: The controlling the operating state of the fan according to the target fan duty cycle includes: Determining a target fan duty cycle interval in which the target fan duty cycle is located from a plurality of fan duty cycle intervals; The operating state of the fan is controlled based on a control strategy corresponding to the target fan duty cycle interval.

7. The fuel cell vehicle fan control method according to claim 1, characterized in that: The method further comprises: Determining whether the target fan duty cycle is greater than a preset duty cycle threshold; If so, a fan heat dissipation fault signal is generated, and a corresponding alarm device is controlled to send out an alarm signal based on the fan heat dissipation fault signal.

8. A fan control device for a fuel cell vehicle, characterized in that: Applied to a controller, the controller is communicatively connected with a radiator, a fan and a plurality of temperature sensors; the fuel cell vehicle fan control device comprises: A parameter acquisition unit, used to determine the heat generation of the battery stack, and to acquire the ambient temperature and the radiator outlet temperature respectively based on the temperature sensors; a total heat dissipation demand determination unit, configured to determine the total heat dissipation demand according to the heat generation of the battery stack, the ambient temperature, and the radiator outlet temperature; A fan control unit is used to determine a target fan duty cycle based on the total heat dissipation demand, and control the operating state of the fan according to the target fan duty cycle.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 7 when executing the program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a computer program, and when the computer program is executed, the server where the computer-readable storage medium is located is controlled to implement the steps of the method according to any one of claims 1 to 7.

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