Method and device for controlling fuel cell of vehicle

Abstract

The invention provides a control method and device for a fuel cell of a vehicle. The vehicle comprises a power battery and a motor. The motor is connected with the fuel cell and the power cell. The fuel cell is turned off when the vehicle is in a pure electric mode and turned on when the vehicle is in an extended range mode. The generated power of the fuel cell comprises a power level interval. The power level interval comprises an interval of at least two levels. The minimum power of the previous level interval is greater than or equal to the maximum power of the next level interval. The control method includes: determining whether the vehicle is in an extended range mode; if the vehicle is in the range extending mode, according to the generated power of the power battery and / or the required power of the motor, the distribution power interval where the generated power of the fuel cell is located is determined; according to the power level interval and the distribution power interval, determining an actual power interval where the generated power of the fuel cell is located; and controlling the fuel cell to output power in the actual power interval. According to the invention, the fuel cell operates efficiently.

Description

Technical Field

[0001] The present application relates to the technical field of power system control of vehicles, and particularly to a control method and device for a fuel cell of a vehicle. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of electrolyzing water. Hydrogen and oxygen are respectively supplied to the anode and cathode of the fuel cell. After hydrogen diffuses out through the anode and reacts with the electrolyte, electrons are released and reach the cathode through an external load. Due to advantages such as high efficiency, zero emissions, and low noise, hydrogen fuel cells have become an important development trend in the transformation of China's energy structure, energy conservation and emission reduction, and the upgrading of the automotive industry, and will become an important solution for the sustainable development of China's cities and economy.

[0003] For passenger vehicle models with a dual-energy system based on a high-voltage power battery and a hydrogen fuel cell, how the battery systems cooperate with each other and how to make the hydrogen fuel cell work more efficiently have become problems to be solved urgently. Summary of the Invention

[0004] The present application provides a control method and device for a fuel cell of a vehicle to make the fuel cell operate efficiently.

[0005] The present application provides a control method for a fuel cell of a vehicle, and the vehicle includes:

[0006] A power battery, electrically connected to the fuel cell; and

[0007] An electric motor, connected to the fuel cell and the power battery respectively;

[0008] The vehicle includes a pure electric mode and an extended range mode. The fuel cell does not generate electricity when the vehicle is in the pure electric mode and is turned on when the vehicle is in the extended range mode;

[0009] The power generation power of the fuel cell includes a power level interval, and the power level interval includes at least two levels of intervals; the minimum power of the previous level interval is greater than or equal to the maximum power of the next level interval;

[0010] The control method includes:

[0011] Determine whether the vehicle is in the extended range mode;

[0012] If the vehicle is in the extended range mode, determine the allocated power interval where the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the electric motor;

[0013] Determine the actual power range in which the power generation power of the fuel cell is located according to the power level range and the allocated power range;

[0014] Control the fuel cell to output power within the actual power range.

[0015] Optionally, the determining the allocated power range in which the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the motor includes:

[0016] If the required power is zero, determine that the allowable charging power of the power battery is the maximum power of the allocated power range.

[0017] Optionally, the determining the actual power range in which the power generation power of the fuel cell is located according to the power level range and the allocated power range includes:

[0018] If the minimum power of the lowest-level power level range is greater than the allowable charging power, determine that the actual power range is zero;

[0019] If the minimum power of any power level range is less than or equal to the allowable charging power and the maximum power is greater than or equal to the allowable charging power, determine that the range from the minimum power of this level power range to the maximum power of the range where the allowable charging power is located is the actual power range;

[0020] If the maximum power of any power level range is less than the allowable charging power and the minimum power of the previous-level range of this power level range is greater than the allowable charging power, determine that this power level range is the actual power range.

[0021] Optionally, the determining the allocated power range in which the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the motor includes:

[0022] If the power generation power is zero and the required power is not zero, determine that the range from the required power to the allowable charging power of the power battery is the allocated power range.

[0023] Optionally, the determining the actual power range in which the power generation power of the fuel cell is located according to the power level range and the allocated power range includes:

[0024] If the minimum power of the lowest-level power level range is greater than or equal to the allowable charging power, determine that the actual power range is zero;

[0025] If there is an overlapping part between the allocated power range and the power level range, determine the power of the overlapping part between the allocated power range and the power level range as the actual power range;

[0026] If the maximum power of the power level range of the highest level is less than or equal to the required power, determine the power level range of the highest level as the actual power range.

[0027] Optionally, the determining the allocated power range where the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the motor includes:

[0028] If the required power is greater than the power generation power of the power battery, determine the required power as the maximum power of the allocated power range.

[0029] Optionally, the determining the actual power range where the power generation power of the fuel cell is located according to the power level range and the allocated power range includes:

[0030] If the minimum power of the power level range of the lowest level is greater than or equal to the required power, determine the actual power range as zero;

[0031] If the minimum power of any one of the power level ranges is less than the required power and the maximum power is greater than or equal to the required power, determine the maximum power from the minimum power of this power level range to the power range where the required power is located as the actual power range;

[0032] If the maximum power of any one of the power level ranges is less than the required power and the minimum power of the power level range of the previous level of this power level range is greater than or equal to the required power, determine this power level range as the actual power range.

[0033] Optionally, the determining whether the vehicle is in the range extender mode includes:

[0034] Determine whether the vehicle is in the range extender mode according to the remaining power of the power battery.

[0035] Optionally, the determining whether the vehicle is in the range extender mode includes:

[0036] Determine whether the vehicle is in the range extender mode according to at least one of the ambient temperature and the stack temperature of the fuel cell.

[0037] This application also provides a control device for a fuel cell of a vehicle, including one or more processors for implementing the control method for a fuel cell of a vehicle described in any one of the above.

[0038] In some embodiments, the motors of the vehicle are respectively connected to a fuel cell and a power battery. The fuel cell can charge the power battery or directly drive the motors. The vehicle includes a pure electric mode and an extended range mode. The fuel cell does not generate electricity when the vehicle is in the pure electric mode and is turned on when the vehicle is in the extended range mode. The power generation power of the fuel cell includes a power level range, and the power level range includes at least two levels of intervals. The minimum power of the previous level range is greater than or equal to the maximum power of the next level range. If the vehicle is in the extended range mode, according to the power generation power of the power battery and / or the required power of the motor, determine the allocated power range in which the power generation power of the fuel cell is located; according to the power level range and the allocated power range, determine the actual power range in which the power generation power of the fuel cell is located; control the fuel cell to output power within the actual power range, so that the power of the fuel cell can operate efficiently while meeting the vehicle working condition requirements and being within any preset power level range.

[0039] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0040] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0041] Figure 1 The structural block diagram of an embodiment of the vehicle of this application is shown.

[0042] Figure 2 The flowchart of an embodiment of the control method of the fuel cell of the vehicle of this application is shown.

[0043] Figure 3 The structural block diagram of the control device of the fuel cell of the vehicle provided by the embodiment of this application is shown. Detailed Description of the Embodiments

[0044] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are only examples of the devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0045] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "an" do not denote a limitation of quantity, but mean that there is at least one. "Plurality" or "several" means two or more. Unless otherwise specified, the terms such as "front part", "rear part", "lower part" and / or "upper part" are for convenience of description only and are not limited to a position or a spatial orientation. The terms such as "comprise" or "include" mean that the elements or items appearing before "comprise" or "include" cover the elements or items listed after "comprise" or "include" and their equivalents, and do not exclude other elements or items. The terms such as "connect" or "couple" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0046] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "the" and "said" used in this application and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0047] The vehicle of the embodiment of this application includes a power battery and a motor. The motor is respectively connected to a fuel cell and the power battery. The fuel cell is turned off when the vehicle is in the pure electric mode and turned on when the vehicle is in the extended range mode. The power generation power of the fuel cell includes a power level range. The power level range includes at least two levels of ranges. The minimum power of the previous level range is greater than or equal to the maximum power of the next level range. The control method includes: determining whether the vehicle is in the extended range mode; if the vehicle is in the extended range mode, determining the allocated power range in which the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the motor; determining the actual power range in which the power generation power of the fuel cell is located according to the power level range and the allocated power range; controlling the fuel cell to output the power within the actual power range. This application enables the fuel cell to operate efficiently.

[0048] This application provides a control method and device for a fuel cell of a vehicle. The following will describe in detail the control method and device for the fuel cell of the vehicle of this application with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0049] Figure 1 The structure block diagram of an embodiment of the vehicle 10 of the present application is shown.

[0050] The vehicle 10 of the embodiments of the present application includes, but is not limited to, sedans, SUVs, MPVs, off-road vehicles, pickup trucks, or other power-driven non-railborne vehicles. The vehicle 10 includes hybrid new energy vehicles and other vehicles that use in-vehicle power batteries as the main power source or one of the power sources.

[0051] As Figure 1 shown, the vehicle 10 includes: a fuel cell 11, a power battery 12, a control device 13, and an electric motor 14.

[0052] In some embodiments, the fuel cell 11 includes a hydrogen fuel cell. The power battery 12 is electrically connected to the fuel cell 11. When the fuel cell 11 is in the startup state, the fuel cell 11 can supply power to the power battery 12. The power battery 12 includes a lithium battery. The electric motor 14 is respectively connected to the fuel cell 11 and the power battery 12. The fuel cell 11 and the power battery 12 can drive the electric motor 14. The control device 13 is communicatively connected to the fuel cell 11. The control device 13 is used to control the operation of the fuel cell 11. The control device 13 is used to execute the control method of the present application.

[0053] The vehicle 10 includes a pure electric mode and an extended range mode. The fuel cell 11 does not generate electricity when the vehicle 10 is in the pure electric mode and is turned on when the vehicle 10 is in the extended range mode. In the pure electric mode, the electric motor 14 is only powered by the power battery 12. In the extended range mode, the electric motor 14 is powered by the power battery 12 and / or the fuel cell 11. In the extended range mode, the fuel cell 11 charges the power battery 12, or simultaneously charges the power battery 12 and directly drives the electric motor 14.

[0054] The power generation power of the fuel cell 11 includes a power level interval. The power level interval includes at least two levels of intervals. The minimum power of the upper level interval is greater than or equal to the maximum power of the lower level interval. Each power level interval may include multiple power values or may include one power value. The power level interval is the interval where the fuel cell 11 operates at a high efficiency point. The power level interval is pre-calibrated according to the efficiency characteristics of the fuel cell 11. According to different vehicle models, the power level interval may be different.

[0055] Figure 2 The flowchart of an embodiment of the control method 20 of the fuel cell of the vehicle of the present application is shown. The control device 13 is used to execute the control method 20 of the present application.

[0056] The control method 20 includes: step 21 to step 24.

[0057] Step 21, determine whether the vehicle 10 is in the extended range mode.

[0058] In some embodiments, step 21 includes: determining whether the vehicle 10 is in the range extender mode according to the remaining power of the power battery 12. In some embodiments, the vehicle 10 includes a battery management system electrically connected to the power battery 12. The remaining power of the power battery 12 can be sent to the control device 13 through the battery management system. In some embodiments, when the remaining power of the power battery 12 is lower than the power threshold, the vehicle 10 enters the range extender mode, and the control device 13 controls the fuel cell 11 to start. When the remaining power of the power battery 12 is higher than the power threshold, the vehicle 10 enters the pure electric mode, and the control device 13 controls the fuel cell 11 to turn off.

[0059] In some embodiments, step 21 further includes: determining whether the vehicle 10 is in the range extender mode according to the remaining power of the power battery 12, and at least one of the ambient temperature and the stack temperature of the fuel cell 11. In some embodiments, the vehicle 10 includes an ambient temperature sensor, and the fuel cell 11 includes a stack temperature sensor. The control device 13 determines whether the vehicle 10 is in the range extender mode according to the ambient temperature detected by the ambient temperature sensor and the stack temperature detected by the stack temperature sensor. In some embodiments, when the ambient temperature is lower than the ambient temperature threshold, and / or the stack temperature is lower than the stack temperature threshold, if the remaining power of the power battery 12 is lower than the first power threshold, the vehicle 10 is in the range extender mode. When the ambient temperature is higher than the ambient temperature threshold, and the stack temperature is higher than the stack temperature threshold, if the remaining power of the power battery 12 is lower than the second power threshold, the vehicle 10 is in the range extender mode.

[0060] If the vehicle 10 is in the range extender mode, execute step 22. If the vehicle 10 is not in the range extender mode, end the process.

[0061] Step 22, if the vehicle 10 is in the range extender mode, determine the distribution power interval in which the power generation power of the fuel cell 11 is located according to the power generation power of the power battery 12 and / or the required power of the motor 14.

[0062] The power generation power of the power battery 12 is the driving power provided by the power battery 12 to the motor 14. The required power of the motor 14 is the driving power required by the motor 14. The control device 13 can obtain the power generation power of the power battery 12 through the battery management system. The control device 13 can obtain the required power of the motor 14 through the motor controller. The control device 13 can also obtain the power generation power of the power battery 12 and the required power of the motor 14 through the vehicle controller. According to the power generation power of the power battery 12 and the required power of the motor 14, the power of the power battery 12 and the working condition of the vehicle 10 can be judged, and according to the preset control logic, the distribution power interval in which the power generation power of the fuel cell 11 is located can be determined.

[0063] Step 23: Determine the actual power range in which the power generation power of the fuel cell 11 is located according to the power level range and the allocated power range.

[0064] The allocated power range determined in step 22 may not be the efficient operating range of the fuel cell 11. To improve the operating efficiency of the fuel cell 11, control the fuel cell 11 to output power within the power level range. By comparing the power level range and the allocated power range, the actual power range in which the power generation power of the fuel cell 11 is located can be determined.

[0065] Step 24: Control the fuel cell 11 to output power within the actual power range.

[0066] Control the fuel cell 11 to output power within the actual power range. In this way, while the power of the fuel cell 11 meets the working condition requirements of the vehicle 10, it is within any preset power level range, and the fuel cell 11 can operate efficiently.

[0067] In some embodiments, step 22 includes: if the required power is zero, determine that the allowable charging power of the power battery 12 is the maximum power of the allocated power range.

[0068] Step 23 includes: if the minimum power of the lowest-level power level range is greater than the allowable charging power, determine that the actual power range is zero; if the minimum power of any power level range is less than or equal to the allowable charging power and the maximum power is greater than or equal to the allowable charging power, determine that the range from the minimum power of this level power range to the maximum power of the range where the allowable charging power is located is the actual power range; if the maximum power of any power level range is less than the allowable charging power and the minimum power of the previous-level range of this power level range is greater than the allowable charging power, determine that this power level range is the actual power range.

[0069] If the required power is zero, it means that the motor 14 does not need to drive and the vehicle 10 is in neutral. At this time, all the power generation power of the fuel cell 11 is used to charge the power battery 12. Therefore, the power generation power of the fuel cell 11 cannot exceed the allowable charging power of the power battery 12, and the allowable charging power of the power battery 12 is determined as the maximum power of the allocated power range of the fuel cell 11.

[0070] The lowest-level power level range is the lowest-level power level range among all power level ranges, and there is no next-level power level range among all power level ranges. If the minimum power of the lowest-level power level range is greater than the allowable charging power, it means that even if the fuel cell 11 outputs power according to the lowest power level, it will exceed the allowable charging power. Therefore, determine that the actual power range of the fuel cell 11 is zero and the fuel cell 11 is turned off.

[0071] If the minimum power of any power level interval is less than or equal to the allowable charging power, and the maximum power is greater than or equal to the allowable charging power, it indicates that the allowable charging power is included in this power level interval. Determine the maximum power from the minimum power of this power level interval to the power at the allowable charging power within the interval as the actual power interval.

[0072] If the maximum power of any power level interval is less than the allowable charging power, and the minimum power of the previous power level interval of this power level interval is greater than the allowable charging power, it indicates that the allowable charging power is between this power level interval and the previous power level interval. Determine this power level interval as the actual power interval. This can ensure that the actual power interval does not exceed the allowable charging power and is within the high-efficiency region.

[0073] In some embodiments, step 22 includes: If the power generation power is zero and the demand power is not zero, determine the interval from the demand power to the power at the allowable charging power of the power battery 12 as the allocated power interval.

[0074] Step 23 includes: If the minimum power of the lowest-level power level interval is greater than or equal to the allowable charging power, determine the actual power interval as zero; if there is an overlapping part between the allocated power interval and the power level interval, determine the power of the overlapping part between the allocated power interval and the power level interval as the actual power interval; if the maximum power of the highest-level power level interval is less than or equal to the demand power, determine the highest-level power level interval as the actual power interval.

[0075] If the power generation power is zero and the demand power is not zero, it indicates that the motor 14 needs to be driven and the power battery 12 needs to be charged. At this time, the output power of the fuel cell 11 needs to drive the motor 14 and charge the power battery 12 simultaneously. Therefore, the allocated power interval of the fuel cell 11 needs to be greater than the demand power of the motor 14 and less than the allowable charging power of the power battery 12.

[0076] If the minimum power of the lowest-level power level interval is greater than or equal to the allowable charging power, it indicates that even if the fuel cell 11 outputs power according to the lowest power level, it will exceed the allowable charging power. Therefore, determine the actual power interval of the fuel cell 11 as zero, and the fuel cell 11 is turned off.

[0077] If there is an overlapping part between the allocated power range and the power level range, determine the power of the overlapping part between the allocated power range and the power level range as the actual power range. For example, the power level range includes a first power level range and a second power level range. The first power level range is 90% - 100% of the full power of the fuel cell 11, and the second power level range is 50% - 70% of the full power of the fuel cell 11. The allocated power range is 40% - 95% of the full power of the fuel cell 11. Then the actual power range is the power of the overlapping part between the allocated power range and the power level range, that is, 50% - 70% of the full power of the fuel cell 11 and 90% - 95% of the full power of the fuel cell 11.

[0078] If the maximum power of the highest-level power level range is less than or equal to the required power, determine the highest-level power level range as the actual power range. In this way, the power of the actual power range can be prevented from exceeding the allowable charging power, preventing overcharging of the power battery 12, and making the fuel cell 11 work in the high-efficiency region as much as possible.

[0079] In some embodiments, step 22 includes: if the required power is greater than the power generation power of the power battery 12, determine the required power as the maximum power of the allocated power range.

[0080] Step 23 includes: if the minimum power of the lowest-level power level range is greater than or equal to the required power, determine that the actual power range is zero; if the minimum power of any power level range is less than the required power and the maximum power is greater than or equal to the required power, determine the maximum power from the minimum power of this power level range to the maximum power of the interval where the required power is located as the actual power range; if the maximum power of any power level range is less than the required power and the minimum power of the power level range at the previous level of this power level range is greater than or equal to the required power, determine this power level range as the actual power range.

[0081] If the required power is greater than the power generation power of the power battery 12, it means that the power generation power of the power battery 12 cannot meet the motor 14, and the fuel cell 11 needs to jointly drive the motor 14. The power output by the fuel cell 11 is less than the required power of the motor 14. Determine the required power as the maximum power of the allocated power range.

[0082] If the minimum power of the lowest-level power level range is greater than or equal to the required power, it means that even if the fuel cell 11 outputs power according to the lowest power level, it will exceed the required power. Therefore, determine that the actual power range of the fuel cell 11 is zero and the fuel cell 11 is turned off.

[0083] If the minimum power of any power level interval is less than the required power, and the maximum power is greater than or equal to the required power, it indicates that the required power is included in this power level interval. Determine the interval from the minimum power of this power level interval to the maximum power of the interval where the required power is located as the actual power interval. In this way, the actual power interval will not exceed the required power.

[0084] If the maximum power of any power level interval is less than the required power, and the minimum power of the power level interval of the previous level is greater than or equal to the required power, it indicates that the required power is between this power level interval and the interval of the previous level. Determine this power level interval as the actual power interval. In this way, the power of the actual power interval can be made not to exceed the required power, and the fuel cell 11 can be made to operate in the high-efficiency region as much as possible.

[0085] Figure 3 The following shows a structural block diagram of a control device 13 for a fuel cell of a vehicle provided by an embodiment of the present application.

[0086] As Figure 3 shown, the control device 13 includes one or more processors 31 for implementing the control method 20 for the fuel cell of the vehicle as described above.

[0087] In some embodiments, the control device 13 for the fuel cell of the vehicle may include a computer-readable storage medium 32. The computer-readable storage medium 32 may store a program that can be called by the processor 31, and may include a non-volatile storage medium. In some embodiments, the control device 13 for the fuel cell of the vehicle may include a memory 33 and an interface 34. In some embodiments, the control device 13 for the fuel cell of the vehicle may further include other hardware according to actual applications.

[0088] The computer-readable storage medium 32 of the embodiment of the present application stores a program thereon. When the program is executed by the processor 31, it is used to implement the control method 20 for the fuel cell of the vehicle as described above.

[0089] The present application may take the form of a computer program product implemented on one or more computer-readable storage media 32 (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain program code. The computer-readable storage media 32 include both permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of the computer-readable storage media 32 include but are not limited to: phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0090] Other embodiments of the present application will be readily apparent to those skilled in the art after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed herein. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0091] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A control method for a fuel cell of a vehicle, characterized in that, The vehicle includes: a power battery electrically connected to the fuel cell; and an electric motor connected to the fuel cell and the power battery respectively; The vehicle includes a pure electric mode and an extended range mode. The fuel cell does not generate electricity when the vehicle is in the pure electric mode and is turned on when the vehicle is in the extended range mode; The power generation power of the fuel cell includes a power level interval, and the power level interval includes at least two levels of intervals; the minimum power of the previous level interval is greater than or equal to the maximum power of the next level interval; The control method includes: determining whether the vehicle is in the extended range mode; if the vehicle is in the extended range mode, determining the allocation power interval in which the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the electric motor; determining the actual power interval in which the power generation power of the fuel cell is located according to the power level interval and the allocation power interval; controlling the fuel cell to output a power within the actual power interval.

2. The control method according to claim 1, wherein The determining the allocation power interval in which the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the electric motor includes: if the required power is zero, determining the allowable charging power of the power battery as the maximum power of the allocation power interval.

3. The control method according to claim 2, wherein The determining the actual power interval in which the power generation power of the fuel cell is located according to the power level interval and the allocation power interval includes: if the minimum power of the lowest level of the power level interval is greater than the allowable charging power, determining the actual power interval as zero; if the minimum power of any one of the power level intervals is less than or equal to the allowable charging power and the maximum power is greater than or equal to the allowable charging power, determining the interval from the minimum power of this level power interval to the maximum power of the interval where the allowable charging power is located as the actual power interval; if the maximum power of any one power level interval is less than the allowable charging power and the minimum power of the previous level interval of this power level interval is greater than the allowable charging power, determining this power level interval as the actual power interval.

4. The control method according to claim 1, wherein The determining the allocation power interval in which the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the electric motor includes: if the power generation power is zero and the required power is not zero, determining the interval from the required power to the allowable charging power of the power battery as the allocation power interval.

5. The control method according to claim 4, wherein The determining the actual power interval in which the power generation power of the fuel cell is located according to the power level interval and the allocation power interval includes: if the minimum power of the lowest level of the power level interval is greater than or equal to the allowable charging power, determining the actual power interval as zero; if there is an overlapping part between the allocation power interval and the power level interval, determining the power of the overlapping part between the allocation power interval and the power level interval as the actual power interval; If the maximum power of the power level interval of the highest level is less than or equal to the required power, determine the power level interval of the highest level as the actual power interval.

6. The control method according to claim 1, characterized in that The determining the allocation power interval in which the power generation power of the fuel cell is located according to the power generation power of the power battery and / or the required power of the motor includes: If the required power is greater than the power generation power of the power battery, determine the required power as the maximum power of the allocation power interval.

7. The control method according to claim 6, characterized in that, The determining the actual power interval in which the power generation power of the fuel cell is located according to the power level interval and the allocation power interval includes: If the minimum power of the power level interval of the lowest level is greater than or equal to the required power, determine the actual power interval as zero; If the minimum power of any one of the power level intervals is less than the required power and the maximum power is greater than or equal to the required power, determine the interval from the minimum power of this power level interval to the maximum power of the interval where the required power is located as the actual power interval; If the maximum power of any one of the power level intervals is less than the required power and the minimum power of the power level interval of the previous level of this power level interval is greater than or equal to the required power, determine this power level interval as the actual power interval.

8. The control method according to claim 1, characterized in that The determining whether the vehicle is in the range extender mode includes: Determine whether the vehicle is in the range extender mode according to the remaining power of the power battery.

9. The control method according to claim 8, wherein The determining whether the vehicle is in the range extender mode includes: Determine whether the vehicle is in the range extender mode according to at least one of the ambient temperature and the stack temperature of the fuel cell.

10. A control device for a fuel cell of a vehicle, characterized in that, Includes one or more processors for implementing the control method of the fuel cell of the vehicle according to any one of claims 1-9.

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