Disclosure of Invention
In order to solve the technical problem, the application provides a control method and a control device for a fuel cell vehicle, which are used for prolonging the service life of a fuel cell of the fuel cell vehicle powered by a dual-fuel cell.
In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:
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 the average power of the fuel cell vehicle in a historical time period;
predicting the predicted average power of the fuel cell vehicle in a preset time period;
and when the average power and the predicted average power are both smaller than a first power threshold value, switching the fuel cell automobile from a dual-fuel cell working mode to a single-fuel cell working mode.
As a possible implementation, the method further includes:
and when the average power and the predicted average power are both larger than a second power threshold value, switching the fuel cell automobile from a single fuel cell working mode to a dual fuel cell working mode, wherein the second power threshold value is larger than the first power threshold value.
As a possible implementation, the method further includes:
and when the average power is larger than a third power threshold value, switching the fuel cell automobile from a single fuel cell working mode to a double fuel cell working mode, wherein the third power threshold value is larger than the second power threshold value.
As a possible embodiment, the predicting the predicted average power of the fuel cell vehicle over a preset time period includes:
and predicting the predicted average power of the fuel cell vehicle in a 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.
As a possible embodiment, 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 remaining life is longer than the second remaining life, switching the fuel cell automobile from a mode in which the first fuel cell and the second fuel cell work together into a mode in which the first fuel cell works alone.
As a possible embodiment, the 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 the accumulated operation time length, the rated voltage, the working time length and the starting times of each power end 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, the rated voltage, the working time length of each power end and the starting times of the second fuel cell.
An embodiment of the present application further provides a control device for a fuel cell vehicle, where the fuel cell vehicle includes two fuel cells, including:
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 vehicle 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 both smaller than a first power threshold value.
As a possible implementation, the method further includes:
and the second switching module is used for switching the single fuel cell working mode of the fuel cell automobile into 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 implementation, the method further includes:
and the third switching module is used for switching the single fuel cell working mode of the fuel cell automobile into the 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, the prediction module is specifically configured to:
and predicting the predicted average power of the fuel cell vehicle in a 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.
According to the technical scheme, the method 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 the average power of the fuel cell vehicle in a historical time period; predicting the predicted average power of the fuel cell vehicle in a preset time period; and when the average power and the predicted average power are both smaller than a first power threshold value, switching the fuel cell automobile from a dual-fuel cell working mode to a single-fuel cell working mode.
Therefore, the control method of the fuel cell vehicle provided by the embodiment of the application can be used for switching the operation mode of the fuel cell vehicle to the single fuel cell operation mode when the average power and the predicted average power of the fuel cell vehicle are smaller, namely, when the power of the fuel cell vehicle is lower, only one fuel cell is adopted for operation, so that the state that two fuel cells in the fuel cell vehicle simultaneously operate at low power is reduced, and the comprehensive service life of the two fuel cells is prolonged.
Detailed Description
In order to help better understand the scheme provided by the embodiment of the present application, before describing the method provided by the embodiment of the present application, a scenario of an application of the scheme of the embodiment of the present application is described.
The maximum power of a single fuel cell is limited due to the influence of factors such as the fuel cell stack structure, the current, the auxiliary engine performance and the like. Fuel cell vehicles, such as heavy duty fuel cell vehicles, that have greater power requirements have power requirements that far exceed the maximum power of a single fuel cell. Therefore, these fuel cell vehicles with high demand usually use two fuel cells in parallel to supply power to meet their power demand. However, fuel cell vehicles powered by dual fuel cells have a limited fuel cell life. There is a need in the art for a method of extending the life of the fuel cell of such a fuel cell vehicle.
In order to solve the above technical problem, an embodiment of the present application provides a control method of a fuel cell vehicle, where the fuel cell vehicle includes two fuel cells, and the control method includes: obtaining the average power of the fuel cell vehicle in a historical time period; predicting the predicted average power of the fuel cell vehicle in a preset time period; and when the average power and the predicted average power are both smaller than a first power threshold value, switching the fuel cell automobile from a dual-fuel cell working mode to a single-fuel cell working mode.
Therefore, the control method of the fuel cell vehicle provided by the embodiment of the application can be used for switching the operation mode of the fuel cell vehicle to the single fuel cell operation mode when the average power and the predicted average power of the fuel cell vehicle are smaller, namely, when the power of the fuel cell vehicle is lower, only one fuel cell is adopted for operation, so that the state that two fuel cells in the fuel cell vehicle simultaneously operate at low power is reduced, and the comprehensive service life of the two fuel cells is prolonged.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the drawings are described in detail below.
Referring to fig. 1, a flowchart of a control method of a fuel cell vehicle according to an embodiment of the present disclosure is shown.
The fuel cell vehicle provided by the embodiment of the application comprises two fuel cells, and as shown in fig. 1, the method comprises the following steps:
s101: the 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 vehicle in a preset time period.
S103: and when the average power and the predicted average power are both smaller than a first power threshold value, 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 embodiment of the present application may be implemented by a vehicle controller in a fuel cell vehicle. The embodiment of the present application does not limit the sequence of step S101 and step S102. The control method of the fuel cell vehicle in the embodiment of the application can obtain the average power of the fuel cell vehicle in a historical time period first, then predict the predicted average power of the fuel cell vehicle in a preset time period, and also can predict the predicted average power of the fuel cell vehicle in the preset time period first, and then obtain the average power of the fuel cell vehicle in the historical time period. Of course, these two steps may also be performed simultaneously, and the embodiments of the present application are 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 by obtaining the average power of the fuel cell vehicle in the recent historical period. Specifically, the average power of the fuel cell vehicle over the history period may be the driving demand power of the fuel cell vehicle over the history period.
As a possible implementation manner, in the embodiment of the present application, the predicting the predicted average power of the fuel cell vehicle in the preset time period may be according to a real-time road condition of the fuel cell vehicle in the preset time period, and/or predicting the predicted average power of the fuel cell vehicle in the preset time period according to a vehicle load of the fuel cell vehicle. It should be understood that the preset time period may be the closest preset time period to the current time period. The fuel cell vehicle may predict the predicted average power over the preset time period based on a road congestion situation, a road uphill or downhill situation, a fuel-electric vehicle load, and the like over the preset time period.
It should be noted that the first power threshold in the embodiment of the present application may be the maximum available generated power with high reliability and high efficiency of the fuel cell. As one example, the first power threshold may be about 60% of the maximum power of the fuel cell. The dual fuel cell operation mode in the embodiment of the present application refers to a mode in which two fuel cells in a fuel cell vehicle operate 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, the control method of the fuel cell vehicle according to the embodiment of the present application may switch the operation mode of the fuel cell vehicle to the single fuel cell operation mode when the average power of the fuel cell vehicle and the predicted average power are smaller, which indicates that the current power of the fuel cell vehicle is lower. According to the method provided by the embodiment of the application, when the power of the fuel cell automobile is low, only one fuel cell is adopted for working, the state that two fuel cells in the fuel cell automobile work at low power simultaneously 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 vehicle can be switched from the single fuel cell operation mode to the dual fuel cell operation mode, and the second power threshold is greater than the first power threshold. It should be understood that when the average power and the predicted average power are greater than the second power threshold, which indicates that the required power of the fuel cell vehicle is greater at this time, 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 this condition. As one example, the second power threshold in the 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 a third power threshold, the fuel cell vehicle 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 a possible implementation, the third power threshold may be the sum of the maximum power of the fuel cell and the outputtable power of the 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 operating mode, and at this time, the operating mode of the fuel cell vehicle may be switched to the dual fuel cell operating mode directly according to the average power of the fuel cell vehicle without considering the predicted average power.
As one possible embodiment, a fuel cell vehicle including a first fuel cell and a second fuel cell, switching the fuel cell vehicle from a dual fuel cell operation mode to a 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; when the first remaining life is longer than the second remaining life, the fuel cell vehicle is switched from a mode in which the first fuel cell and the second fuel cell operate together to a mode in which the first fuel cell operates 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 the accumulated running time, the rated voltage, the working time of each power end and the 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, the rated voltage, the working time length of each power end and the starting times of the second fuel cell.
It should be understood that there may be a difference in the life of the two fuel cells in the fuel cell vehicle, and in order to improve the overall life of the two fuel cells in the fuel cell vehicle, when the fuel cell vehicle is in the single fuel cell mode, the longer remaining battery of the two fuel cells may be selected for operation, and the shorter remaining battery may be selected for shutdown, so that the overall life of the two fuel cells is improved.
In order to better understand the control method of the fuel cell vehicle provided in the embodiments of the present application, a fuel cell vehicle system is described below by way of an example.
Referring to fig. 2, the figure is a schematic diagram of a fuel cell automobile system according to an embodiment of the present application.
As shown in fig. 2, a fuel cell system in a fuel cell automobile system provided in an embodiment of the present application includes two fuel cells: a first fuel cell module and a fuel cell module 2. The two fuel cells are supplied with hydrogen gas through a hydrogen storage system, and then output electric energy to a Power Distribution Unit (PDU) through a DC/DC boost circuit. The power distribution unit outputs a part of the current for providing 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 another part of the current for providing power to the motor controller. The power distribution power supply also outputs a part of the current to the electric auxiliary machine other than the motor.
In summary, the control method of the 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 switched to the single fuel cell operation mode. According to the method provided by the embodiment of the application, when the power of the fuel cell automobile is low, only one fuel cell with long residual life is adopted for working, the battery with short residual life is stopped, and the comprehensive life of the two fuel cells is prolonged.
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, the drawing is a schematic diagram of a control device of a fuel cell vehicle according to an embodiment of the present application.
The fuel cell vehicle provided by the embodiment of the present application includes two fuel cells, and as shown in fig. 3, the apparatus includes:
an obtaining module 100 for obtaining an average power of the fuel cell vehicle over a historical period of time;
the prediction module 200 is used for predicting the predicted average power of the fuel cell vehicle in a preset time period;
and the first switching module 300 is used for switching the fuel cell automobile from the dual-fuel cell working mode to the single-fuel cell working mode when the average power and the predicted average power are both smaller than the first power threshold.
As a possible implementation, the apparatus further comprises: and the second switching module is used for switching the single fuel cell working mode of the fuel cell automobile into 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 implementation, the apparatus further comprises: and the third switching module is used for switching the single fuel cell working mode of the fuel cell automobile into the dual-fuel cell working mode when the average power is greater than a third power threshold, and the third power threshold is greater than the second power threshold.
As a possible implementation, 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 conditions 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 of the 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 can be switched to the single fuel cell operation mode. The device that this application embodiment provided only adopts a longer fuel cell of surplus life to work when fuel cell car's power is lower, and the short battery of surplus life is shut down, has improved two fuel cell's comprehensive life.
As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the above embodiment methods can be implemented by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling 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 according to the embodiments or some parts of the embodiments of the present application.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The method disclosed by the embodiment corresponds to the system disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the system part for description.
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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing description of the disclosed embodiments will enable those skilled in the art to make or use the invention in various modifications to these embodiments, which will be apparent to those skilled in the art, and the general principles defined herein may be implemented in 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.