CN114103734B - Control method and device for fuel cell automobile - Google Patents
Control method and device for fuel cell automobile Download PDFInfo
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- CN114103734B CN114103734B CN202111661798.0A CN202111661798A CN114103734B CN 114103734 B CN114103734 B CN 114103734B CN 202111661798 A CN202111661798 A CN 202111661798A CN 114103734 B CN114103734 B CN 114103734B
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- 239000000446 fuel Substances 0.000 title claims abstract description 325
- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000009977 dual effect Effects 0.000 claims description 16
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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Abstract
The application discloses a control method and a device of a fuel cell automobile, wherein the fuel cell automobile comprises two fuel cells, and the method comprises the following steps: obtaining an average power of the fuel cell vehicle over a historical period of time; predicting a predicted average power of the fuel cell vehicle over a preset period of time; and when the average power and the predicted average power are both smaller than the first power threshold, switching the fuel cell automobile from the dual-fuel cell operation mode to the single-fuel cell operation mode. Therefore, according to the control method of the fuel cell automobile provided by the embodiment of the application, when the average power and the predicted average power of the fuel cell automobile are smaller, the working mode of the fuel cell automobile is converted into the single fuel cell working mode, namely, when the power of the fuel cell automobile is lower, only one fuel cell is adopted for working, so that the state that two fuel cells in the fuel cell automobile work at the same time in a low power mode is reduced, and the comprehensive service life of the two fuel cells is prolonged.
Description
Technical Field
The application relates to the field of vehicles, in particular to a control method and a control device for a fuel cell automobile.
Background
The maximum power of a single fuel cell is limited due to factors such as the stack structure, current, auxiliary performance, etc. Fuel cell vehicles with a greater power demand, such as heavy duty fuel cell vehicles, have a power demand far exceeding the maximum power of a single fuel cell. Therefore, these more demanding fuel cell vehicles are typically powered by two fuel cells in parallel to meet their power requirements.
Fuel cell vehicles powered with dual fuel cells have limited fuel cell life. There is an urgent need in the art for a method that can extend the life of the fuel cell vehicle.
Disclosure of Invention
In order to solve the technical problems, the application provides a control method and a control device for a fuel cell automobile, which are used for prolonging the service life of a fuel cell of the fuel cell automobile powered by a dual-fuel cell.
In order to achieve the above object, the technical solution provided by the embodiments of the present application is as follows:
the embodiment of the application provides a control method of a fuel cell automobile, which comprises two fuel cells, and comprises the following steps:
Obtaining an average power of the fuel cell vehicle over a historical period of time;
Predicting a predicted average power of the fuel cell vehicle over a preset period of time;
and when the average power and the predicted average power are both smaller than a first power threshold, switching the fuel cell automobile from a dual-fuel cell working mode to a single-fuel cell working mode.
As a possible embodiment, the method further includes:
and when the average power and the predicted average power are both larger than a second power threshold, switching the fuel cell automobile from a single fuel cell working mode to a dual fuel cell working mode, wherein the second power threshold is larger than the first power threshold.
As a possible embodiment, the method further includes:
And when the average power is larger than a third power threshold, switching the fuel cell automobile from a single fuel cell working mode to a dual fuel cell working mode, wherein the third power threshold is larger than the second power threshold.
As a possible implementation manner, the predicting the predicted average power of the fuel cell vehicle in the preset time period includes:
and predicting the predicted average power of the fuel cell automobile in the preset time period according to the real-time road condition of the fuel cell automobile in the preset time period and/or the vehicle load of the fuel cell automobile.
As one possible implementation manner, the fuel cell vehicle includes a first fuel cell and a second fuel cell, and the switching the fuel cell vehicle from the dual fuel cell operation mode to the single fuel cell operation mode includes:
Estimating a first remaining life of the first fuel cell and a second remaining life of the second fuel cell;
And when the first residual life is longer than the second residual life, switching the mode of the fuel cell automobile operated by the first fuel cell and the second fuel cell to the mode of the first fuel cell operated by the first fuel cell alone.
As a possible implementation manner, the estimating the first remaining life of the first fuel cell and the second remaining life of the second fuel cell includes:
Estimating a first residual life of the first fuel cell according to at least one of the accumulated operation time length, rated voltage, working time length of each power end and starting times of the first fuel cell;
And estimating a second residual life of the second fuel cell according to at least one of the accumulated operation time length, rated voltage, working time length of each power end and starting times of the second fuel cell.
The embodiment of the application also provides a control device of the fuel cell automobile, which comprises two fuel cells and comprises:
An obtaining module for obtaining an average power of the fuel cell vehicle over a historical period of time;
the prediction module is used for predicting the predicted average power of the fuel cell automobile in a preset time period;
and the first switching module is used for switching the fuel cell automobile from a dual-fuel cell working mode to a single-fuel cell working mode when the average power and the predicted average power are smaller than a first power threshold value.
As a possible embodiment, the method further includes:
And the second switching module is used for switching the fuel cell automobile from a single fuel cell working mode to a dual-fuel cell working mode when the average power and the predicted average power are both larger than a second power threshold, and the second power threshold is larger than the first power threshold.
As a possible embodiment, the method further includes:
and the third switching module is used for switching the fuel cell automobile from a single fuel cell working mode to a dual-fuel cell working mode when the average power is larger than a third power threshold, and the third power threshold is larger than the second power threshold.
As a possible implementation manner, the prediction module is specifically configured to:
and predicting the predicted average power of the fuel cell automobile in the preset time period according to the real-time road condition of the fuel cell automobile in the preset time period and/or the vehicle load of the fuel cell automobile.
According to the technical scheme, the application has the following beneficial effects:
The embodiment of the application provides a control method of a fuel cell automobile, wherein the fuel cell automobile comprises two fuel cells, and the control method comprises the following steps: obtaining an average power of the fuel cell vehicle over a historical period of time; predicting a predicted average power of the fuel cell vehicle over a preset period of time; and when the average power and the predicted average power are both smaller than the first power threshold, switching the fuel cell automobile from the dual-fuel cell operation mode to the single-fuel cell operation mode.
Therefore, according to the control method of the fuel cell automobile provided by the embodiment of the application, when the average power and the predicted average power of the fuel cell automobile are smaller, the working mode of the fuel cell automobile is converted into the single fuel cell working mode, namely, when the power of the fuel cell automobile is lower, only one fuel cell is adopted for working, so that the state that two fuel cells in the fuel cell automobile work at the same time in a low power mode is reduced, and the comprehensive service life of the two fuel cells is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a control method of a fuel cell vehicle according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a fuel cell vehicle system according to an embodiment of the present application;
fig. 3 is a schematic diagram of a control device of a fuel cell vehicle according to an embodiment of the present application.
Detailed Description
In order to better understand the scheme provided by the embodiment of the present application, before introducing the method provided by the embodiment of the present application, a scenario of application of the scheme of the embodiment of the present application is first described.
The maximum power of a single fuel cell is limited due to factors such as the stack structure, current, auxiliary performance, etc. Fuel cell vehicles with a greater power demand, such as heavy duty fuel cell vehicles, have a power demand far exceeding the maximum power of a single fuel cell. Therefore, these more demanding fuel cell vehicles are typically powered by two fuel cells in parallel to meet their power requirements. Fuel cell vehicles powered with dual fuel cells have limited fuel cell life. There is an urgent need in the art for a method that can extend the life of the fuel cell vehicle.
In order to solve the above technical problems, an embodiment of the present application provides a control method of a fuel cell vehicle, where the fuel cell vehicle includes two fuel cells, including: obtaining an average power of the fuel cell vehicle over a historical period of time; predicting a predicted average power of the fuel cell vehicle over a preset period of time; and when the average power and the predicted average power are both smaller than the first power threshold, switching the fuel cell automobile from the dual-fuel cell operation mode to the single-fuel cell operation mode.
Therefore, according to the control method of the fuel cell automobile provided by the embodiment of the application, when the average power and the predicted average power of the fuel cell automobile are smaller, the working mode of the fuel cell automobile is converted into the single fuel cell working mode, namely, when the power of the fuel cell automobile is lower, only one fuel cell is adopted for working, so that the state that two fuel cells in the fuel cell automobile work at the same time in a low power mode is reduced, and the comprehensive service life of the two fuel cells is prolonged.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of embodiments of the application will be rendered by reference to the appended drawings and appended drawings.
Referring to fig. 1, a flowchart of a control method of a fuel cell vehicle according to an embodiment of the present application is shown.
The fuel cell automobile provided by the embodiment of the application comprises two fuel cells, as shown in fig. 1, and the method comprises the following steps:
S101: an average power of the fuel cell vehicle over a historical period of time is obtained.
S102: and predicting the predicted average power of the fuel cell automobile in a preset time period.
S103: and when the average power and the predicted average power are both smaller than a first power threshold, switching the fuel cell automobile from a dual-fuel cell working mode to a single-fuel cell working mode.
It should be noted that the steps in the embodiments of the present application may be implemented by the whole vehicle controller in the fuel cell vehicle. The embodiment of the application does not limit the sequence of the step S101 and the step S102. The control method of the fuel cell automobile in the embodiment of the application can not only firstly obtain the average power of the fuel cell automobile in the historical time period, then predict the predicted average power of the fuel cell automobile in the preset time period, but also firstly predict the predicted average power of the fuel cell automobile in the preset time period, and then obtain the average power of the fuel cell automobile in the historical time period. Of course, these two steps may also be performed simultaneously, which is not limited herein.
It should be noted that, in the embodiment of the present application, the average power of the fuel cell vehicle in the historical period may be obtained in order to obtain the average power of the fuel cell vehicle in the last historical period. Specifically, the average power of the fuel cell vehicle during the history period may be the driving demand power of the fuel cell vehicle during the history period.
As a possible implementation manner, the predicted average power of the fuel cell vehicle in the preset time period according to the embodiment of the present application may be a real-time road condition of the fuel cell vehicle in the preset time period, and/or the predicted average power of the fuel cell vehicle in the preset time period may be predicted according to the vehicle load of the fuel cell vehicle. It should be appreciated that the preset time period may be the nearest preset time period to the current time period. The fuel cell vehicle may predict the predicted average power in the preset time period based on the road congestion condition, the road uphill or downhill condition, the load of the fuel cell vehicle, and the like in the preset time period.
It should be noted that, the first power threshold in the embodiment of the present application may be the maximum high reliability and high efficiency available generated power of the fuel cell. As one example, the first power threshold may be around 60% of the maximum power of the fuel cell. The dual fuel cell operation mode in the embodiment of the application refers to a mode in which two fuel cells in a fuel cell vehicle are operated simultaneously and output power. The single fuel cell operation mode is a mode in which one fuel cell in the fuel cell vehicle operates to output power and the other fuel cell does not operate.
Therefore, according to the control method of the fuel cell vehicle provided by the embodiment of the application, when the average power and the predicted average power of the fuel cell vehicle are smaller, the current power of the fuel cell vehicle is lower, and the working mode of the fuel cell vehicle can be converted into the single fuel cell working mode. When the power of the fuel cell automobile is low, the method provided by the embodiment of the application only adopts one fuel cell to work, so that the state that two fuel cells in the fuel cell automobile work at the same time in a low power mode is reduced, and the comprehensive service life of the two fuel cells is prolonged.
In the embodiment of the application, when the average power and the predicted average power are both greater than the second power threshold, the fuel cell automobile can be switched from the single fuel cell working mode to the dual fuel cell working mode, and the second power threshold is greater than the first power threshold. It should be appreciated that when the average power and the predicted average power are greater than the second power threshold, it is indicated that the required power of the fuel cell vehicle is greater at this time, and the fuel cell vehicle may be switched from the single fuel cell operation mode to the dual fuel cell operation mode, so that the fuel cell vehicle has good performance under the working condition. As an example, the second power threshold in embodiments of the present application may be the maximum power of a single fuel cell.
In the embodiment of the application, when the average power is greater than the third power threshold, the fuel cell automobile can be switched from the single fuel cell operation mode to the dual fuel cell operation mode, wherein the third power threshold is greater than the second power threshold. As one possible embodiment, the third power threshold may be a sum of a maximum power of the fuel cell and an outputtable power of a power cell in the fuel cell vehicle. When the average power of the fuel cell vehicle is greater than the third power threshold, it indicates that the average power of the fuel cell vehicle is greater than the maximum outputtable power of the fuel cell vehicle in the single fuel cell operation mode, and the operation mode of the fuel cell vehicle may be switched to the dual fuel cell operation mode directly according to the average power of the fuel cell vehicle without considering the predicted average power.
As one possible implementation, a fuel cell vehicle includes a first fuel cell and a second fuel cell, and switches the fuel cell vehicle from a dual fuel cell operation mode to a single fuel cell operation mode, including: estimating a first remaining life of the first fuel cell and a second remaining life of the second fuel cell; when the first remaining life is longer than the second remaining life, the mode in which the fuel cell vehicle is operated by the first fuel cell and the second fuel cell together is switched to the mode in which the first fuel cell is operated by the first fuel cell alone. Specifically, estimating a first remaining life of the first fuel cell and a second remaining life of the second fuel cell includes: estimating a first residual life of the first fuel cell according to at least one of accumulated operation time, rated voltage, working time of each power end and starting times of the first fuel cell; and estimating the second residual life of the second fuel cell according to at least one of the accumulated operation time length, the rated voltage, the working time length of each power end and the starting times of the second fuel cell.
It should be appreciated that the life of two fuel cells in a fuel cell vehicle may differ such that in order to increase the overall life of two fuel cells in a fuel cell vehicle, when the fuel cell vehicle is in a single fuel cell mode, a longer remaining life of the two fuel cells may be selected for operation and a shorter remaining life of the two fuel cells may be shut down, thereby increasing the overall life of the two fuel cells.
In order to better understand the control method of the fuel cell vehicle provided by the embodiment of the present application, a fuel cell vehicle system will be described below by way of an example.
Referring to fig. 2, a schematic diagram of a fuel cell automobile system according to an embodiment of the present application is shown.
As shown in fig. 2, a fuel cell system in a fuel cell automobile system provided by an embodiment of the present application includes two fuel cells: fuel cell module one and fuel cell module 2. The two fuel cells supply hydrogen through a hydrogen storage system, and then output the output electric energy to a PDU (Power Distribution Unit ) through a DC/DC boost circuit. The power distribution unit outputs a part of the current supplied with power to the power battery, the power battery outputs the current to the motor controller, and the power battery is managed by the battery management system BMS. The power distribution unit directly outputs the other part of the current for providing power to the motor controller. In addition, the power distribution power supply outputs a part of the current to the electric auxiliary machine other than the motor.
In summary, according to the control method for the fuel cell vehicle provided by the embodiment of the application, when the average power and the predicted average power of the fuel cell vehicle are smaller, it is indicated that the current power of the fuel cell vehicle is lower, and at this time, the working mode of the fuel cell vehicle can be converted into the single fuel cell working mode. When the power of the fuel cell automobile is low, the method provided by the embodiment of the application only adopts one fuel cell with longer residual life to work, and the battery with shorter residual life is stopped, so that the comprehensive life of the two fuel cells is improved.
According to the control method of the fuel cell automobile provided by the embodiment, the embodiment of the application also provides a control device of the fuel cell automobile.
Referring to fig. 3, a schematic diagram of a control device for a fuel cell vehicle according to an embodiment of the present application is shown.
The fuel cell automobile provided by the embodiment of the application comprises two fuel cells, as shown in fig. 3, the device comprises:
An obtaining module 100 for obtaining an average power of the fuel cell vehicle over a historical period of time;
a prediction module 200, configured to predict a predicted average power of the fuel cell vehicle during a preset period of time;
the first switching module 300 is configured to switch the fuel cell vehicle from the dual fuel cell operation mode to the single fuel cell operation mode when the average power and the predicted average power are both less than the first power threshold.
As a possible embodiment, the apparatus further comprises: and the second switching module is used for switching the fuel cell automobile from the single fuel cell working mode to the dual-fuel cell working mode when the average power and the predicted average power are both larger than a second power threshold, and the second power threshold is larger than the first power threshold.
As a possible embodiment, the apparatus further comprises: and the third switching module is used for switching the fuel cell automobile from the single fuel cell working mode to the dual fuel cell working mode when the average power is larger than a third power threshold value, and the third power threshold value is larger than the second power threshold value.
As a possible implementation manner, the prediction module is specifically configured to: and predicting the predicted average power of the fuel cell vehicle in the preset time period according to the real-time road condition of the fuel cell vehicle in the preset time period and/or the vehicle load of the fuel cell vehicle.
In summary, the control device for a fuel cell vehicle according to the embodiment of the present application indicates that the current power of the fuel cell vehicle is low when the average power and the predicted average power of the fuel cell vehicle are low, and at this time, the operation mode of the fuel cell vehicle may be converted into the single fuel cell operation mode. When the power of the fuel cell automobile is low, the device provided by the embodiment of the application only adopts one fuel cell with longer residual life to work, and the battery with shorter residual life is stopped, so that the comprehensive life of the two fuel cells is improved.
From the above description of embodiments, it will be apparent to those skilled in the art that all or part of the steps of the above described example methods may be implemented in software plus necessary general purpose hardware platforms. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the method described in the embodiments or some parts of the embodiments of the present application.
It should be noted that, in the present description, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the method disclosed in the embodiment, since it corresponds to the system disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the system part.
It should also 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 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments, to enable any person skilled in the art to make or use the present application, will be readily apparent to those of ordinary skill 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 (10)
1. A control method of a fuel cell vehicle, characterized in that the fuel cell vehicle includes two fuel cells, comprising:
obtaining an average power of the fuel cell vehicle over a historical period of time; the average power is the driving demand power of the fuel cell automobile in the historical time period;
predicting a predicted average power of the fuel cell vehicle over a preset period of time; the preset time period is the nearest preset time period from the historical time period;
and when the average power and the predicted average power are both smaller than a first power threshold, switching the fuel cell automobile from a dual-fuel cell working mode to a single-fuel cell working mode.
2. The method as recited in claim 1, further comprising:
and when the average power and the predicted average power are both larger than a second power threshold, switching the fuel cell automobile from a single fuel cell working mode to a dual fuel cell working mode, wherein the second power threshold is larger than the first power threshold.
3. The method as recited in claim 2, further comprising:
And when the average power is larger than a third power threshold, switching the fuel cell automobile from a single fuel cell working mode to a dual fuel cell working mode, wherein the third power threshold is larger than the second power threshold.
4. The method of claim 1, wherein predicting the predicted average power of the fuel cell vehicle over a preset period of time comprises:
and predicting the predicted average power of the fuel cell automobile in the preset time period according to the real-time road condition of the fuel cell automobile in the preset time period and/or the vehicle load of the fuel cell automobile.
5. The method of claim 1, wherein the fuel cell vehicle comprises a first fuel cell and a second fuel cell, and wherein switching the fuel cell vehicle from a dual fuel cell mode of operation to a single fuel cell mode of operation comprises:
Estimating a first remaining life of the first fuel cell and a second remaining life of the second fuel cell;
And when the first residual life is longer than the second residual life, switching the mode of the fuel cell automobile operated by the first fuel cell and the second fuel cell to the mode of the first fuel cell operated by the first fuel cell alone.
6. The method of claim 5, wherein the estimating the first remaining life of the first fuel cell and the second remaining life of the second fuel cell comprises:
Estimating a first residual life of the first fuel cell according to at least one of the accumulated operation time length, rated voltage, working time length of each power end and starting times of the first fuel cell;
And estimating a second residual life of the second fuel cell according to at least one of the accumulated operation time length, rated voltage, working time length of each power end and starting times of the second fuel cell.
7. A control device of a fuel cell vehicle, characterized in that the fuel cell vehicle includes two fuel cells, comprising:
An obtaining module for obtaining an average power of the fuel cell vehicle over a historical period of time; the average power is the driving demand power of the fuel cell automobile in the historical time period;
the prediction module is used for predicting the predicted average power of the fuel cell automobile in a preset time period; the preset time period is the nearest preset time period from the historical time period;
and the first switching module is used for switching the fuel cell automobile from a dual-fuel cell working mode to a single-fuel cell working mode when the average power and the predicted average power are smaller than a first power threshold value.
8. The apparatus as recited in claim 7, further comprising:
And the second switching module is used for switching the fuel cell automobile from a single fuel cell working mode to a dual-fuel cell working mode when the average power and the predicted average power are both larger than a second power threshold, and the second power threshold is larger than the first power threshold.
9. The apparatus as recited in claim 8, further comprising:
and the third switching module is used for switching the fuel cell automobile from a single fuel cell working mode to a dual-fuel cell working mode when the average power is larger than a third power threshold, and the third power threshold is larger than the second power threshold.
10. The apparatus of claim 7, wherein the prediction module is specifically configured to:
and predicting the predicted average power of the fuel cell automobile in the preset time period according to the real-time road condition of the fuel cell automobile in the preset time period and/or the vehicle load of the fuel cell automobile.
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