CN113942426A

CN113942426A - Fuel cell energy management method, device, equipment and readable storage medium

Info

Publication number: CN113942426A
Application number: CN202111370618.3A
Authority: CN
Inventors: 李梦妮; 李春东; 刘金鑫; 黄国靖; 毛天仪
Original assignee: Dongfeng Trucks Co ltd
Current assignee: Dongfeng Trucks Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-01-18
Anticipated expiration: 2041-11-18
Also published as: CN113942426B

Abstract

The application relates to a fuel cell energy management method, a device, equipment and a readable storage medium, relating to the technical field of battery energy management, and comprising the steps of acquiring a real-time SOC value and a last SOC value of a power battery, and determining a first SOC interval according to the last SOC value; judging whether the real-time SOC value is greater than or equal to the lower limit value of the SOC hysteresis interval and smaller than the upper limit value of the first SOC interval; and if so, determining the first output power of the fuel-electric system according to the real-time SOC value and the mapping relation between the first SOC interval and the fuel-electric output power, and taking the first output power as the output power of the fuel cell. Through the application, even if the SOC value of the power battery fluctuates, as long as the SOC value is not less than the lower limit value of the SOC hysteresis interval, the output power at the last moment can be used as the real-time output power of the fuel battery, so that frequent change of the output power is avoided, and the durability and the service life of the fuel battery are further improved.

Description

Fuel cell energy management method, device, equipment and readable storage medium

Technical Field

The present disclosure relates to the field of battery energy management technologies, and in particular, to a method, an apparatus, a device and a readable storage medium for fuel cell energy management.

Background

In recent years, due to the rising of oil prices, the instability of resources, and the influence of global warming, more and more enterprises and researchers have been invested in the field of new energy vehicles. Among them, the fuel cell hybrid vehicle is favored by many researchers due to its advantages of short refueling time, long driving range, zero emission, and the like. However, in order to be able to efficiently supply the energy required for vehicle travel, and to reduce the consumption of hydrogen and extend the life of the battery to compete with conventional internal combustion engine vehicles, an energy management control strategy for fuel cell hybrid vehicles must be developed to achieve this set of goals.

In the related technology, the lowest output power of the hydrogen fuel cell is determined by the real-time hydrogen fuel cell intervening vehicle speed and the real-time vehicle speed of the vehicle, although the method can control the hydrogen fuel cell to output low power when the vehicle brakes, the braking energy recovery rate is improved; however, the method for adjusting the energy distribution of the hydrogen fuel cell system depends on the comparison with the real-time vehicle speed of the vehicle, and when the vehicle runs on a non-specific road, the vehicle speed changes very rapidly, so that the output power of the hydrogen fuel cell system, namely the output power at the current moment, changes rapidly, so that the durability of the fuel cell is not facilitated, and the service life of the fuel cell is influenced.

Disclosure of Invention

The application provides a fuel cell energy management method, a device, equipment and a readable storage medium, which are used for solving the problems of poor durability and short service life of a fuel cell caused by controlling the energy distribution of the fuel cell through a real-time vehicle speed in the related art.

In a first aspect, a fuel cell energy management method is provided, comprising the steps of:

acquiring a real-time SOC value and a last-time SOC value of a power battery, and determining a first SOC interval according to the last-time SOC value;

judging whether the real-time SOC value is larger than or equal to a lower limit value of an SOC hysteresis interval and smaller than an upper limit value of a first SOC interval, wherein the SOC hysteresis interval is determined based on the first SOC interval and a corresponding preset hysteresis value;

and if so, determining first output power of the fuel-electric system according to the real-time SOC value and the mapping relation between the first SOC interval and the fuel-electric output power, and taking the first output power as the output power of the fuel cell.

In some embodiments, after the step of using the first output power as the output power of the fuel cell, the method further includes:

acquiring second output power of the combustion electric system at the last moment;

comparing the first output power with the second output power;

if the first output power is smaller than the second output power, the power battery is used as a power source and supplies power to the load of the whole vehicle simultaneously with the fuel battery;

if the first output power is equal to the second output power, the fuel cell is used as a power source to supply power for the load of the whole vehicle;

and if the first output power is larger than the second output power, enabling the fuel electric system to charge the power battery.

In some embodiments, the second output power is an instantaneous power consumption of the entire vehicle.

In some embodiments, after the step of determining whether the real-time SOC value is greater than or equal to the lower limit value of the SOC hysteresis interval and less than the upper limit value of the first SOC interval, the method further includes:

if the real-time SOC value is larger than or equal to the upper limit value of the first SOC interval, determining a second SOC interval according to the real-time SOC value, wherein the lower limit value of the second SOC interval is equal to the upper limit value of the first SOC interval;

and determining third output power of the fuel-electric system according to the mapping relation between the second SOC interval and the fuel-electric output power, and taking the third output power as the output power of the fuel cell.

if the real-time SOC value is smaller than the lower limit value of the SOC hysteresis interval, determining a third SOC interval according to the real-time SOC value, wherein the upper limit value of the third SOC interval is equal to the lower limit value of the first SOC interval;

and determining fourth output power of the fuel-electric system according to the mapping relation between the third SOC interval and the fuel-electric output power, and taking the fourth output power as the output power of the fuel cell.

In a second aspect, there is provided a fuel cell energy management device comprising:

the acquiring unit is used for acquiring a real-time SOC value and a last-time SOC value of the power battery and determining a first SOC interval according to the last-time SOC value;

the judging unit is used for judging whether the real-time SOC value is greater than or equal to a lower limit value of an SOC hysteresis interval and smaller than an upper limit value of a first SOC interval, and the SOC hysteresis interval is determined based on the first SOC interval and a corresponding preset hysteresis value;

In some embodiments, the apparatus further comprises a control unit for:

comparing the first output power with the second output power;

In some embodiments, the determining unit is further configured to:

In a third aspect, there is provided a fuel cell energy management device comprising: the fuel cell energy management system comprises a memory and a processor, wherein at least one instruction is stored in the memory, and is loaded and executed by the processor to realize the fuel cell energy management method.

In a fourth aspect, a computer-readable storage medium is provided that stores computer instructions that, when executed by a computer, cause the computer to perform the aforementioned fuel cell energy management method.

The beneficial effect that technical scheme that this application provided brought includes: the durability and the service life of the fuel cell can be improved, and the energy management of the fuel cell can be effectively realized.

The application provides a fuel cell energy management method, a device, equipment and a readable storage medium, which comprises the steps of obtaining a real-time SOC value of a power cell and an SOC value at the previous moment, and determining a first SOC interval according to the SOC value at the previous moment; judging whether the real-time SOC value is greater than or equal to the lower limit value of the SOC hysteresis interval and smaller than the upper limit value of the first SOC interval, wherein the SOC hysteresis interval is determined based on the first SOC interval and a corresponding preset hysteresis value; and if so, determining the first output power of the fuel-electric system according to the real-time SOC value and the mapping relation between the first SOC interval and the fuel-electric output power, and taking the first output power as the output power of the fuel cell. Through the application, even if the SOC value of the power battery fluctuates, as long as the SOC value is not smaller than the lower limit value of the SOC hysteresis interval, the first output power of the fuel-electric system can be determined according to the mapping relation between the first SOC interval determined by the SOC value at the last moment and the fuel-electric output power, the first output power is used as the output power of the fuel battery, namely the output power at the last moment is used as the real-time output power of the fuel battery, so that frequent change of the output power is avoided, the durability and the service life of the fuel battery are further improved, and the energy management of the fuel battery is effectively realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic flow chart of a fuel cell energy management method according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a fuel cell energy management device according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a fuel cell energy management device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a fuel cell energy management method, a device, equipment and a readable storage medium, which can solve the problems of poor durability and short service life of a fuel cell caused by controlling the energy distribution of the fuel cell through a real-time vehicle speed in the related art.

Fig. 1 is a method for managing energy of a fuel cell according to an embodiment of the present application, including the following steps:

step S10: acquiring a real-time SOC value and a last-time SOC value of a power battery, and determining a first SOC interval according to the last-time SOC value;

step S20: judging whether the real-time SOC value is greater than or equal to a lower limit value of an SOC hysteresis interval and smaller than an upper limit value of a first SOC interval, wherein the SOC hysteresis interval is determined based on the first SOC interval and a corresponding preset hysteresis value;

step S30: and if so, determining first output power of the fuel-electric system according to the real-time SOC value and the mapping relation between the first SOC interval and the fuel-electric output power, and taking the first output power as the output power of the fuel cell.

Through the application, even if the SOC value of the power battery fluctuates, as long as the SOC value is not smaller than the lower limit value of the SOC hysteresis interval, the first output power of the fuel-electric system can be determined according to the mapping relation between the first SOC interval determined by the SOC value at the last moment and the fuel-electric output power, the first output power is used as the output power of the fuel battery, namely the output power at the last moment is used as the real-time output power of the fuel battery, so that frequent change of the output power is avoided, the durability and the service life of the fuel battery are further improved, and the energy management of the fuel battery is effectively realized.

Further, in the embodiment of the present application, after the step of using the first output power as the output power of the fuel cell, the method further includes:

acquiring second output power of the combustion electric system at the last moment, wherein the second output power is instantaneous consumed power of the whole vehicle;

comparing the first output power with the second output power;

Furthermore, in this embodiment of the present application, after the step of determining whether the real-time SOC value is greater than or equal to the lower limit of the SOC hysteresis interval and less than the upper limit of the first SOC interval, the method further includes:

The specific operation and principles of the fuel cell energy management method are further explained below.

Exemplarily, in the embodiment of the present application, a mapping relationship between a State of Charge (SOC) interval of the power battery and the output power of the fuel-electric system is preset, for example, if the SOC interval is [ 85%, 100% ], the output power of the fuel-electric system is 0; the SOC interval is [ 83%, 85%), and then the output power of the fuel-electric system is 19 kw; the SOC interval is [ 80%, 83%), and the output power of the fuel-electric system is 37 kw; the SOC interval is [ 75%, 80%), and the output power of the fuel-electric system is 52 kw; the SOC interval is [0, 55%), the output power of the combustion system is 108kw, and it should be noted that the example of the mapping relationship between the SOC interval and the output power of the combustion system is only an exemplary presentation, and a specific mapping relationship may be set according to actual requirements, which is not limited herein.

Determining SOC hysteresis intervals of the SOC intervals according to a preset hysteresis value, wherein the preset hysteresis value can be obtained by calibrating according to test and real vehicle test conditions, and if the preset hysteresis value of the SOC interval of [ 85%, 100% ] is 1%, the SOC hysteresis interval of [ 84%, 85% ]isobtained; the preset hysteresis value of the SOC interval is [ 83%, 85%) and is 2%, and the SOC hysteresis interval is [ 81%, 83%); the predetermined hysteresis value of the SOC interval [ 80%, 83%) is 3%, and the SOC hysteresis interval is [ 77%, 80% ].

For example, the obtained real-time SOC value is 81%, the SOC value at the previous time is 82%, a first SOC interval is [ 80%, 83%) and the output power of the fuel cell system is 37kw according to the SOC value at the previous time, and since 81% of the real-time SOC value still falls within the first SOC interval, the output power of the fuel cell system still takes 37kw (i.e., the first output power) as the output power of the fuel cell; for another example, the obtained real-time SOC value is 79%, the SOC value at the previous time is 82%, the first SOC interval is [ 80%, 83%) according to the SOC value at the previous time, the corresponding SOC hysteresis interval is [ 77%, 80% ], and the output power of the fuel cell system is 37kw, because 79% of the real-time SOC value falls within the SOC hysteresis interval of [ 77%, 80% ], at this time, the fuel cell system still uses the output power of 37kw as the output power of the fuel cell.

Therefore, even if the real-time SOC value of the power battery fluctuates, as long as the real-time SOC value changes in the corresponding SOC interval and the hysteresis interval corresponding to the SOC interval, the first output power of the fuel-electric system is kept unchanged, specifically, the first output power of the fuel-electric system can be determined according to the mapping relationship between the first SOC interval determined by the SOC value at the previous time and the fuel-electric output power, and the first output power is used as the output power of the fuel battery, that is, the output power at the previous time is used as the real-time output power of the fuel battery, so that frequent changes of the output power are avoided, the durability and the service life of the fuel battery are improved, and the energy management of the fuel battery is effectively realized.

When the real-time SOC value is greater than or equal to the upper limit value of the first SOC interval, for example, the SOC value at the previous time is 82%, and the real-time SOC value is 84%, it indicates that the power battery is in a charging state at this time, which further indicates that the vehicle will maintain the power consumption at the lower gear for a longer time, and in order to improve the output utilization rate of the fuel electric system, the power consumption of the entire vehicle can be directly provided more, and the output power of the fuel battery needs to be reduced, and at this time, the first output power of the fuel battery can jump to the output power at the lower gear (for example, 19 kw). Therefore, the second SOC interval [ 83%, 85%) can be determined from the real-time SOC value of 84%, and then the third output power is determined to be 19kw from the second SOC interval, and 19kw is taken as the output power of the fuel cell.

When the real-time SOC value is smaller than the lower limit value of the SOC hysteresis interval, for example, the SOC value at the previous time is 82%, and the real-time SOC value is 76%, it may be determined that the first SOC interval is [ 80%, 83%) according to the SOC value at the previous time, and the corresponding SOC hysteresis interval is [ 77%, 80% ], and the output power of the fuel-electric system is 37kw, since 76% of the real-time SOC value is smaller than 77%, it indicates that the power battery is in a power output state at this time, and the power battery SOC is reduced to a large extent as a power source to supply power to the load of the entire vehicle, which further indicates that the vehicle will maintain the power consumption at a higher gear for a longer time, and in order to avoid that the power battery SOC consumes too fast to affect the high-voltage output of the entire vehicle, the power of the fuel-electric system needs to be increased, and the first output power of the fuel battery may jump to the output power at a higher gear (for example, 52 kw). Therefore, it is possible to determine the third SOC interval as [ 75%, 80%) from the real-time SOC value of 76%, and then determine the fourth output power as 52kw from the third SOC interval, and take 52kw as the output power of the fuel cell.

Further, acquiring a second output power of the fuel electric system at the previous moment, namely the instantaneous consumed power of the whole vehicle at the previous moment, and when the first output power is smaller than the second output power, for example, the first output power is 37kw and the second output power is 39kw, it indicates that the output of the fuel electric system is not enough to maintain the power output of the whole vehicle, and at this moment, the power battery needs to be used as an auxiliary power source to output and the fuel battery to supply power to the load of the whole vehicle at the same time; if the SOC value at the previous time is 82% and the real-time SOC value is 76%, the real-time SOC value is reduced from 82% to 76% at the previous time, which indicates that the output power of the power battery plus the output power of the fuel battery can only just maintain the power output of the whole vehicle, but the loss of the power battery is large, so the output power of the fuel battery needs to be increased; then, the corresponding SOC interval can be adjusted to [ 75%, 80%) according to the real-time SOC value of 76%, and the output power is correspondingly adjusted to 52kw, and 52kw is taken as the output power of the fuel cell; however, if the SOC value at the previous time is 82% and the real-time SOC value is 79%, since 79% falls within the SOC hysteresis range of [ 77%, 80% ], the output power of the fuel cell system is still 37kw as the output power of the fuel cell, and thus frequent changes in the output power can be avoided to reduce the durability of the fuel cell system.

If the first output power is equal to the second output power, the output of the fuel electric system just maintains the power output of the whole vehicle, and the output power of a power output source and the output power of a fuel cell do not need to be adjusted at the moment, and the fuel cell is continuously used as a power source to supply power for the load of the whole vehicle;

if the first output power is greater than the second output power, for example, the first output power is 37kw, and the second output power is 18kw, it indicates that the output power of the fuel-electric system is greater than the consumed power of the entire vehicle, further indicates that the power battery can be used as an energy storage system to store the surplus energy, so that the fuel-electric system can charge the power battery. Obviously, the difference value between the first output power and the second output power is the power part of the power system for charging the power battery; however, in order to avoid energy waste, the fuel cell needs to be mainly used for supplying power to the whole vehicle, and during the charging process, the real-time SOC value of the power battery is increased, so that the first output power of the fuel cell can be adjusted according to the change of the real-time SOC value. For example, the SOC value at the previous time is 82%, and the real-time SOC value is 84%, which has significantly exceeded the upper limit value 83% in the first SOC interval corresponding to the SOC value of 82% at the previous time, the first output power of the combustion-electric system will jump to the output power of the lower first gear, that is, the output power 19kw of the combustion-electric system corresponding to the SOC interval [ 83%, 85%).

Therefore, according to the load consumption of the whole vehicle and the change of the SOC value of the power battery, the output power of the fuel electric system is adjusted from low to high or from high to low in a self-adaptive mode, and meanwhile, an SOC hysteresis interval is also set. Thus, the durability of the fuel cell can be improved while the SOC balance of the power cell is satisfied.

Referring to fig. 2, an embodiment of the present application further provides a fuel cell energy management device, including:

Further, in an embodiment of the present application, the apparatus further includes a control unit configured to:

comparing the first output power with the second output power;

Further, in an embodiment of the present application, the determining unit is further configured to:

Exemplarily, in the embodiment of the present application, the entire vehicle includes a fuel cell system, a power output control system, and a driving system, where the power output control system is connected to both the fuel cell system and the power cell system, and the fuel cell system is used to provide power for the driving system. The power output control system is used for controlling power source output supply and energy distribution of the fuel battery system and the power battery system. Specifically, the vehicle control unit sends a power-on command to the high-voltage distribution box to control the power battery system and the high-voltage contactor of the fuel system to be attracted in the high-voltage distribution box, so that the power output of the power battery system and the power output of the fuel system are controlled.

In addition, a mapping relation between an SOC interval and the fuel-electric output power is preset in the vehicle controller, meanwhile, the instantaneous power consumption of the vehicle is calculated in real time, the energy distribution of the fuel-electric system is controlled according to the mapping relation, a high-voltage contactor, a fuse and the like for controlling the power output of the power battery system and the power output of the fuel-electric system are contained in the high-voltage distribution box, and the high-voltage distribution box controls the on-off of the corresponding high-voltage contactor according to a control instruction of the vehicle controller. The power battery system is used as an auxiliary power source of the whole vehicle, and provides power supplement when the output of the fuel system is not enough to support the load consumption of the whole vehicle, namely when the load of the driving system is larger and the voltage of the fuel system is reduced, the power battery outputs power supply; when the output power of the fuel cell system is larger than the requirement of the driving system or the driving system reversely charges, the fuel system boosts the voltage, the voltage is larger than that of the power cell, and the fuel system charges the power cell at the moment to store the redundant power.

It should be noted that, as will be clear to those skilled in the art, for convenience and brevity of description, the specific working processes of the apparatus and the units described above may refer to the corresponding processes in the foregoing embodiments of the fuel cell energy management method, and are not described herein again.

The fuel cell energy management apparatus provided by the above embodiment may be implemented in the form of a computer program that can be run on the fuel cell energy management device shown in fig. 3.

An embodiment of the present application further provides a fuel cell energy management apparatus, including: the fuel cell energy management system comprises a memory, a processor and a network interface which are connected through a system bus, wherein at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor so as to realize all or part of the steps of the fuel cell energy management method.

The network interface is used for performing network communication, such as sending distributed tasks. Those skilled in the art will appreciate that the architecture shown in fig. 3 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

The Processor may be a CPU, other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the computer device and the various interfaces and lines connecting the various parts of the overall computer device.

The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the computer device by executing or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a video playing function, an image playing function, etc.), and the like; the storage data area may store data (such as video data, image data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.

Embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement all or part of the steps of the foregoing fuel cell energy management method.

The embodiments of the present application may implement all or part of the foregoing processes, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the foregoing methods. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, Read-Only memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, server, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers in the embodiments of the present application are for description only and do not represent the merits of the embodiments.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuel cell energy management method, comprising the steps of:

judging whether the real-time SOC value is greater than or equal to a lower limit value of an SOC hysteresis interval and smaller than an upper limit value of a first SOC interval, wherein the SOC hysteresis interval is determined based on the first SOC interval and a corresponding preset hysteresis value;

2. The fuel cell energy management method according to claim 1, further comprising, after the step of taking the first output power as the output power of the fuel cell:

comparing the first output power with the second output power;

3. The fuel cell energy management method of claim 2, wherein: and the second output power is the instantaneous consumed power of the whole vehicle.

4. The fuel cell energy management method according to claim 1, further comprising, after the step of determining whether the real-time SOC value is greater than or equal to a lower limit value of an SOC hysteresis interval and less than an upper limit value of a first SOC interval:

5. The fuel cell energy management method according to claim 1, further comprising, after the step of determining whether the real-time SOC value is greater than or equal to a lower limit value of an SOC hysteresis interval and less than an upper limit value of a first SOC interval:

6. A fuel cell energy management device, comprising:

7. The fuel cell energy management device of claim 6, further comprising a control unit for:

comparing the first output power with the second output power;

8. The fuel cell energy management device of claim 6, wherein the determination unit is further configured to:

9. A fuel cell energy management device, comprising: a memory and a processor, the memory having stored therein at least one instruction that is loaded and executed by the processor to implement the fuel cell energy management method of any of claims 1-5.

10. A computer-readable storage medium characterized by: the computer storage medium stores computer instructions that, when executed by a computer, cause the computer to perform the fuel cell energy management method of any one of claims 1 to 5.