阅读说明：本技术 燃料电池的需求功率控制方法及装置 (Method and device for controlling required power of fuel cell ) 是由 姜峰 邓金涛 连凤霞 赵国强 解胜东 姜良超 于 2021-09-22 设计创作，主要内容包括：本发明提供一种燃料电池的需求功率控制方法及装置,该方法包括：获取燃料汽车的功率数据,基于所述功率数据确定燃料电池的第一需求功率；在预设的功率阈值表中确定与所述第一需求功率对应的第二需求功率；控制所述燃料电池在预设时长内的需求功率均为所述第二需求功率。基于功率数据确定第一需求功率,并在功率阈值表中确定第二需求功率,最后控制燃料电池在预设时长内的需求功率均为第二需求功率,燃料电池的需求功率无需根据实际需求实时的进行变化,由此保证了燃料电池功率工作的稳定,进而减少电池的损伤,提高系统的使用寿命。(The invention provides a method and a device for controlling the required power of a fuel cell, wherein the method comprises the following steps: acquiring power data of a fuel automobile, and determining first required power of a fuel cell based on the power data; determining a second required power corresponding to the first required power in a preset power threshold value table; and controlling the required power of the fuel cell within a preset time period to be the second required power. The method comprises the steps of determining first required power based on power data, determining second required power in a power threshold table, and finally controlling the required power of the fuel cell within a preset time to be the second required power.)

1. A required power control method for a fuel cell, characterized by comprising:

acquiring power data of a fuel automobile, and determining first required power of a fuel cell based on the power data;

determining a second required power corresponding to the first required power in a preset power threshold value table;

and controlling the required power of the fuel cell within a preset time period to be the second required power.

2. The method of claim 1, the determining a first power demand of a fuel cell based on the power data, comprising:

summing the required power of the motor, the consumed power of the auxiliary engine and the maximum allowable continuous feedback power of the power battery in the power data to obtain total required power;

a first power demand is determined based on the total power demand.

3. The method of claim 1, wherein determining a second power demand corresponding to the first power demand in a table of preset power thresholds comprises:

determining each power threshold interval in the power threshold table;

determining a target interval in each power threshold interval based on the first required power;

and taking the output power of the target interval as a second required power.

4. The method of claim 3, wherein determining a target interval in each of the power threshold intervals based on the first power demand comprises:

comparing the first required power with each power threshold interval one by one;

determining a power threshold interval to which the first required power belongs in each power threshold interval;

and determining the power threshold interval to which the first required power belongs as a target interval.

5. The method of claim 1, further comprising:

controlling the fuel cell to output power based on the second required power for the preset period.

6. A required power control apparatus for a fuel cell, comprising:

an acquisition unit for acquiring power data of a fuel vehicle, and determining a first required power of a fuel cell based on the power data;

the determining unit is used for determining second required power corresponding to the first required power in a preset power threshold value table;

and the control unit is used for controlling the required power of the fuel cell within a preset time length to be the second required power.

7. The apparatus of claim 6, wherein the obtaining unit comprises:

the summation subunit is used for carrying out summation operation on the motor required power, the auxiliary engine consumed power and the maximum allowable continuous feedback power of the power battery in the power data to obtain total required power;

a first determining subunit, configured to determine a first required power based on the total required power.

8. The apparatus of claim 6, wherein the determining unit comprises:

the second determining subunit is used for determining each power threshold value interval in the power threshold value table;

a third determining subunit, configured to determine a target interval in each of the power threshold intervals based on the first required power;

and the fourth determining subunit is used for taking the output power of the target interval as the second required power.

9. The apparatus of claim 8, wherein the third determining subunit comprises:

the comparison module is used for comparing the first required power with each power threshold interval one by one;

a first determining module, configured to determine, in each of the power threshold intervals, a power threshold interval to which the first required power belongs;

and the second determining module is used for determining the power threshold interval to which the first required power belongs as a target interval.

10. The apparatus of claim 6, further comprising:

and the output unit is used for controlling the fuel cell to output power based on the second required power within the preset time length.

Technical Field

The invention relates to the technical field of gas vehicles, in particular to a method and a device for controlling required power of a fuel cell.

Background

Fuel automobiles are one of the important classifications in the field of new energy automobiles, and are highly valued by various large factories due to the advantages of no pollution, no noise, high efficiency and the like. One of the power sources of a fuel automobile is a fuel cell, which is a chemical device that directly converts chemical energy possessed by fuel into electric energy.

In the using process of the current fuel cell, the required power of the fuel cell is usually converted in real time according to the actual required power, and the fuel cell cannot rapidly respond to variable required power, so that the working of the fuel cell is unstable, and the service life of a system is influenced.

Disclosure of Invention

In view of this, the present invention provides a method and an apparatus for controlling required power of a fuel cell, by which the required power of the fuel cell does not need to be changed in real time according to actual requirements, thereby ensuring the stability of the fuel cell, reducing damage, and prolonging service life.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

a first aspect of the present invention discloses a method for controlling required power of a fuel cell, including:

acquiring power data of a fuel automobile, and determining first required power of a fuel cell based on the power data;

determining a second required power corresponding to the first required power in a preset power threshold value table;

and controlling the required power of the fuel cell within a preset time period to be the second required power.

The method described above, optionally, the determining the first required power of the fuel cell based on the power data, includes:

summing the required power of the motor, the consumed power of the auxiliary engine and the maximum allowable continuous feedback power of the power battery in the power data to obtain total required power;

a first power demand is determined based on the total power demand.

The method above, optionally, the determining, in a preset power threshold table, a second required power corresponding to the first required power includes:

determining each power threshold interval in the power threshold table;

determining a target interval in each power threshold interval based on the first required power;

and taking the output power of the target interval as a second required power.

Optionally, the determining a target interval in each power threshold interval based on the first required power includes:

comparing the first required power with each power threshold interval one by one;

determining a power threshold interval to which the first required power belongs in each power threshold interval;

and determining the power threshold interval to which the first required power belongs as a target interval.

The above method, optionally, further includes:

controlling the fuel cell to output power based on the second required power for the preset period.

A second aspect of the present application discloses a required power control apparatus for a fuel cell, comprising:

an acquisition unit for acquiring power data of a fuel vehicle, and determining a first required power of a fuel cell based on the power data;

the determining unit is used for determining second required power corresponding to the first required power in a preset power threshold value table;

and the control unit is used for controlling the required power of the fuel cell within a preset time length to be the second required power.

The above apparatus, optionally, the obtaining unit includes:

the summation subunit is used for carrying out summation operation on the motor required power, the auxiliary engine consumed power and the maximum allowable continuous feedback power of the power battery in the power data to obtain total required power;

a first determining subunit, configured to determine a first required power based on the total required power.

The above apparatus, optionally, the determining unit includes:

the second determining subunit is used for determining each power threshold value interval in the power threshold value table;

a third determining subunit, configured to determine a target interval in each of the power threshold intervals based on the first required power;

and the fourth determining subunit is used for taking the output power of the target interval as the second required power.

The above apparatus, optionally, the third determining subunit includes:

the comparison module is used for comparing the first required power with each power threshold interval one by one;

a first determining module, configured to determine, in each of the power threshold intervals, a power threshold interval to which the first required power belongs;

and the second determining module is used for determining the power threshold interval to which the first required power belongs as a target interval.

The above apparatus, optionally, further comprises:

and the output unit is used for controlling the fuel cell to output power based on the second required power within the preset time length.

Compared with the prior art, the invention has the following advantages:

the invention provides a method and a device for controlling the required power of a fuel cell, wherein the method comprises the following steps: acquiring power data of a fuel automobile, and determining first required power of a fuel cell based on the power data; determining a second required power corresponding to the first required power in a preset power threshold value table; and controlling the required power of the fuel cell within a preset time period to be the second required power. The method comprises the steps of determining first required power based on power data, determining second required power in a power threshold table, and finally controlling the required power of the fuel cell within a preset time to be the second required power.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a flowchart of a method for controlling a required power of a fuel cell according to an embodiment of the present invention;

fig. 2 is a flowchart of another method of controlling a required power of a fuel cell according to an embodiment of the present invention;

fig. 3 is a flowchart of another method of controlling a required power of a fuel cell according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating an exemplary power threshold interval according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a required power control device for a fuel cell according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The present invention applies to fuel vehicle control systems, which may be comprised of general purpose or special purpose computing arrangements, such as server computers, multiprocessor devices, distributed computing environments that include any of the above devices or apparatus, and the like. The execution subject of the present invention may be an actuator or a server in a control system of a fuel automobile.

Referring to fig. 1, a flowchart of a method for controlling a required power of a fuel cell according to an embodiment of the present invention is specifically described as follows:

s101, power data of the fuel automobile are obtained, and first required power of the fuel battery is determined based on the power data.

In the method provided by the embodiment of the invention, the first required power is the maximum value of the actual power requirement of the fuel cell under the normal condition, and the power data of the fuel vehicle comprises but is not limited to the required power of a motor, the consumed power of an auxiliary machine and the maximum allowable continuous feedback power of a power cell; preferably, when acquiring power data of the fuel cell, the power data may be acquired by a sensor, and different sensors acquire different powers. The invention considers the influence of the motor and the auxiliary machine on the required power, so that the finally obtained required power of the fuel cell more conforms to the current vehicle condition requirement.

When the first required power of the fuel cell is determined, summing the motor required power, the auxiliary engine consumed power and the maximum allowable continuous feedback power of the power cell in the power data to obtain the total required power; and calculating the total required power based on a preset calculation rule to obtain a first required power, wherein the first required power is less than or equal to the total required power. Preferably, the preset operation rule is specifically that a multiplication operation is performed on the total required power and a preset power coefficient, and a product obtained by the operation is used as the first required power, wherein the power coefficient is a preset constant and can be set according to an actual requirement; the optional preset operation rule may also be that a preset power value is subtracted from the total required power, and the obtained difference is used as the first required power; the above operation rule is only exemplary, and the operation rule can be applied in the present invention as long as the first required power obtained by calculating the total required power according to the specific content in the operation rule is less than or equal to the total required power.

And S102, determining a second required power corresponding to the first required power in a preset power threshold value table.

The second required power is a power value obtained according to the first required power, and further, the second required power is a power value required to be stepped by the required power of the fuel cell.

Referring to fig. 2, a flowchart of a method for determining a second required power according to another embodiment of the present invention is shown, and the specific process is as follows:

s201, determining each power threshold value interval in the power threshold value table.

The power threshold table comprises a plurality of power threshold intervals, specifically, if 0-60 kw is divided into 6 segments, each power threshold interval specifically comprises: [0,10), [10,20), [20,30), [30,40), [50,60), each power threshold interval in the present invention can be divided according to actual needs. Each power threshold interval has a fixed output power, and preferably, in the present invention, the minimum value in each power threshold interval is used as the fixed output power, and the middle value in the power threshold interval can also be used as the fixed output power, and can be set according to different requirements.

S202, determining a target interval in each power threshold interval based on the first required power.

Referring to fig. 3, a flowchart of a method for determining a target interval in each power threshold interval according to another embodiment of the present invention is specifically described as follows:

s301, comparing the first required power with each power threshold interval one by one.

S302, determining a power threshold interval to which the first required power belongs in each power threshold interval.

S303, determining a power threshold interval to which the first required power belongs as a target interval.

In the method provided in the embodiment of the present invention, the first required power is compared with each power threshold interval one by one, so as to determine the power threshold interval to which the first required power belongs in each power threshold interval, the power threshold interval exemplified in S201 is continued, and assuming that the first required power is 25kw, the power threshold interval to which the first required power belongs is determined to be [20,30 ], and the power threshold interval is taken as a target interval, and further, the output power of the target interval is 20 kw.

And S203, taking the output power of the target interval as a second required power.

In the method provided by the embodiment of the present invention, fig. 4 is an exemplary diagram of power threshold intervals provided by the implementation of the present invention, an abscissa in the diagram is a divided power threshold interval, and there are 6 power threshold intervals in the diagram, which are [0,10 ], [10,20 ], [20,30 ], [30,40), [50, 60); the ordinate in the graph is the output power corresponding to each power threshold interval, specifically: the output power corresponding to the power threshold interval [0,10) is 0 kw; the output power corresponding to the power threshold interval [10,20) is 10 kw; the output power corresponding to the power threshold interval [20,30) is 20 kw; the output power corresponding to the power threshold interval [30,40) is 30 kw; power threshold intervals [50,60)) corresponds to an output power of 50kw, preferably, the output power of each power threshold interval can be taken as a power point. By determining the power threshold interval to which the first required power belongs, the output power corresponding to the first required power can be determined, and the output power can be used as the second required power.

The second required power is the power point where the fuel cell needs to jump, a certain number of power points can be obtained by segmenting the required power of the fuel cell and are used as the power points where the fuel cell normally works, and the jump is carried out among the power points according to the first required power value.

And S103, controlling the required power of the fuel cell in the preset time period to be the second required power.

In the method provided by the embodiment of the present invention, the required powers of the fuel cells are controlled to be the second required power within the preset time, in other words, the required power of the fuel cell is changed to the second required power, and the holding time of the required power of the fuel cell as the second required power reaches the preset time, it should be noted that the preset time is less than or equal to the overcharge time that can be borne by the power storage battery, and further, the preset time is less than or equal to the overcharge time that can be borne by the power storage battery, so that the power storage battery can be protected.

Preferably, when the required powers of the fuel cell in the preset time period are both the second required power, the fuel cell is further controlled to output power based on the second required power in the preset time period, in other words, the fuel cell outputs actual power according to the second required power in the preset time period, and it is to be noted that the power output by the fuel cell gradually approaches the second required power in the preset time period.

In the method provided by the embodiment of the invention, after the second required power is determined, the required power of the fuel cell is controlled to be the second required power within the preset time, so that the stable operation of the fuel cell is ensured as much as possible, the overcharge and damage to the power storage battery are reduced, and the service life of the system is prolonged.

Preferably, after the duration that the required power of the fuel cell is kept as the second required power reaches the preset duration, the first required power of the fuel cell can be re-determined, the second required power is re-determined, the required power of the fuel cell is kept as the re-determined second required power, and the first required power of the fuel cell is returned to be re-determined until the keeping time reaches the preset duration, and the cycle is repeated in such a way, so that the required power of the fuel cell does not change in real time along with the real-time requirement of the actual power, thereby ensuring the stable operation of the fuel cell, reducing the damage of the fuel cell and prolonging the service life. When the required power of the fuel cell is maintained as the second required power, the timer starts to time, and when the time length of the timer reaches the preset time length, the time length during which the required power of the fuel cell is maintained as the second required power can be determined to reach the preset time length, the first required power needs to be determined again, and when the first required power is determined again, the timer is initialized.

In the method provided by the embodiment of the invention, the required power of the fuel cell is segmented, a certain number of power points are taken as the power points of the normal operation of the fuel cell, the jump is carried out among the power points according to the required power value, the power points are forcibly maintained for a period of time after each jump until the maintenance time is over, the next power point is selected according to the required power for jumping, and then the maintenance is continued. Therefore, the problem that the actual charging power of the power battery is larger than the sustainable charging power of the power battery to cause the overcharge fault of the power battery due to the fact that the fuel battery cannot quickly respond to variable required power at present can be solved.

The control method of the required power of the fuel cell provided by the invention has the advantages that the change of the fuel automobile is small, the required power of the fuel cell can be adjusted in a short time, the fuel cell can stably work, the overcharge and damage to the power storage battery are reduced, the fuel cell and the power storage battery are protected, and the service lives of the fuel cell and the power storage battery are prolonged.

The required power of the fuel cell is segmented, and the corresponding output power of each segment is the minimum value of the segment, so that the final required power can be prevented from exceeding the limit at the beginning in the duration, and the working duration of each required power point is within the overcharge time range which can be borne by the power storage battery, so that the power storage battery is ensured not to be damaged, and the problem that the energy generated by the fuel cell can be completely supplied to the motor and cannot be charged when the whole vehicle starts at a large throttle is solved; when the whole vehicle is braked, the braking energy generated by the motor and the energy generated by the fuel cell are charged for the power storage battery, so that the allowable limit of continuous feedback power of the power storage battery is exceeded, and the power storage battery is damaged.

Corresponding to the method shown in fig. 1, an embodiment of the present invention provides a device for controlling required power of a fuel cell, which can be applied to a control system of a fuel automobile, and is used to support the method shown in fig. 1 to be applied in real life, and referring to fig. 5, a schematic structural diagram of the device for controlling required power of a fuel cell provided by an embodiment of the present invention is specifically described as follows:

an obtaining unit 501, configured to obtain power data of a fuel vehicle, and determine a first required power of a fuel cell based on the power data;

a determining unit 502, configured to determine, in a preset power threshold table, a second required power corresponding to the first required power;

and a control unit 503, configured to control the required powers of the fuel cells within a preset time period to be the second required power.

In the device provided by the embodiment of the invention, power data of a fuel automobile are obtained, and first required power of a fuel cell is determined based on the power data; determining a second required power corresponding to the first required power in a preset power threshold value table; and controlling the required power of the fuel cell within a preset time period to be the second required power. The method comprises the steps of determining first required power based on power data, determining second required power in a power threshold table, and finally controlling the required power of the fuel cell within a preset time to be the second required power.

In the apparatus provided in the embodiment of the present invention, the obtaining unit 501 may be configured to:

the summation subunit is used for carrying out summation operation on the motor required power, the auxiliary engine consumed power and the maximum allowable continuous feedback power of the power battery in the power data to obtain total required power;

a first determining subunit, configured to determine a first required power based on the total required power.

In the apparatus provided in the embodiment of the present invention, the determining unit 502 may be configured to:

the second determining subunit is used for determining each power threshold value interval in the power threshold value table;

a third determining subunit, configured to determine a target interval in each of the power threshold intervals based on the first required power;

and the fourth determining subunit is used for taking the output power of the target interval as the second required power.

In the apparatus provided in the embodiment of the present invention, the third determining subunit may be configured to:

the comparison module is used for comparing the first required power with each power threshold interval one by one;

a first determining module, configured to determine, in each of the power threshold intervals, a power threshold interval to which the first required power belongs;

and the second determining module is used for determining the power threshold interval to which the first required power belongs as a target interval.

In the apparatus provided in the embodiment of the present invention, the apparatus may be further configured to:

and the output unit is used for controlling the fuel cell to output power based on the second required power within the preset time length.

The embodiment of the present invention further provides a storage medium, where the storage medium includes a stored instruction, where when the instruction runs, the apparatus where the storage medium is located is controlled to perform the following operations:

acquiring power data of a fuel automobile, and determining first required power of a fuel cell based on the power data;

determining a second required power corresponding to the first required power in a preset power threshold value table;

and controlling the required power of the fuel cell within a preset time period to be the second required power.

An electronic device is provided in an embodiment of the present invention, and the structural diagram of the electronic device is shown in fig. 6, which specifically includes a memory 601 and one or more instructions 602, where the one or more instructions 602 are stored in the memory 601 and configured to be executed by one or more processors 603 to perform the following operations on the one or more instructions 602:

acquiring power data of a fuel automobile, and determining first required power of a fuel cell based on the power data;

determining a second required power corresponding to the first required power in a preset power threshold value table;

and controlling the required power of the fuel cell within a preset time period to be the second required power.

The specific implementation procedures and derivatives thereof of the above embodiments are within the scope of the present invention.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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.