CN110789352A - Average energy consumption and instantaneous energy consumption display method and device of fuel cell automobile - Google Patents
Average energy consumption and instantaneous energy consumption display method and device of fuel cell automobile Download PDFInfo
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Abstract
The invention relates to a method and a device for displaying average energy consumption and instantaneous energy consumption of a fuel cell automobile, wherein the method for displaying the average energy consumption comprises the following steps: calculating the current average energy consumption of the vehicle according to different working conditions, and displaying the average energy consumption and the corresponding units thereof; the working conditions corresponding to the current average energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell is not started and a hybrid power working condition under which the fuel cell is started. According to the working condition that the fuel cell is not started to be purely electric and the working condition that the fuel cell is started to be mixed with power, the accurate data of the vehicle energy consumption is calculated and displayed according to the working conditions, and a driver can know the vehicle energy consumption conditions under different working conditions in real time, so that the driver can be helped to optimize the driving habit and realize energy-saving driving.
Description
Technical Field
The invention relates to a method and a device for displaying average energy consumption and instantaneous energy consumption of a fuel cell automobile, belonging to the technical field of fuel cell automobiles.
Background
The fuel cell system can convert hydrogen energy into electric energy, and simultaneously achieves the environment-friendly effect of zero emission and even negative emission, thereby being the new strength in the field of new energy passenger cars. The fuel cell passenger car adopts a hybrid power system, and the operation working conditions of the hybrid power system are divided into a pure electric power mode and an electric-electric hybrid power mode for starting a fuel cell engine.
At present, in partial traditional automobiles, new energy pure electric automobiles and partial hybrid electric automobiles, average energy consumption and instantaneous energy consumption data under the current driving state and the operation habit can be provided for a driver through an instrument, and the driver can master the skill of energy-saving driving according to the data. For traditional fuel vehicles and pure electric vehicles, the consumed energy is single, so that the energy consumption calculation can be unified. For fuel cell vehicles, the types of energy consumed under different working conditions are different, and the energy consumption units displayed on the front-end instrument under different working conditions are also different, so that accurate display of energy consumption information is difficult to realize.
At present, domestic fuel cell passenger cars are still in research or small-batch operation stages, most of technologies for calculating and displaying the energy consumption of the fuel cell passenger cars are not applied, or the energy consumption condition under a single working condition is only considered, the calculation method cannot be subdivided according to different working conditions of specific operation, and accurate energy consumption data cannot be provided for drivers.
Disclosure of Invention
The invention aims to provide a method and a device for displaying average energy consumption and instantaneous energy consumption of a fuel cell automobile, which are used for solving the problem that the fuel cell automobile cannot provide accurate energy consumption data for a driver, so that the driving energy consumption of the vehicle is high.
In order to solve the technical problem, the invention provides a method for displaying average energy consumption of a fuel cell vehicle, which comprises the following steps:
calculating the current average energy consumption of the vehicle according to different working conditions, and displaying the average energy consumption and the corresponding units thereof; the working conditions corresponding to the current average energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell is not started and a hybrid power working condition under which the fuel cell is started; the calculation formula of the current average energy consumption of the vehicle under different working conditions is as follows:
wherein, W1The current average energy consumption, W, of the vehicle corresponding to the pure electric working condition that the fuel cell is not started2Current average energy consumption, Q, of a vehicle corresponding to a hybrid operating condition in which a fuel cell is ont2Power consumption, Q, corresponding to time t2t1Power consumption corresponding to time t1, Lt2Is the hydrogen consumption corresponding to time t2, Lt1Is the hydrogen consumption corresponding to time t1, St2Is the mileage corresponding to the time t2, St1The mileage corresponds to the time t 1.
The invention also provides an instantaneous energy consumption display method of the fuel cell automobile, which comprises the following steps:
calculating the current instantaneous energy consumption of the vehicle according to different working conditions, and displaying the instantaneous energy consumption and units corresponding to the instantaneous energy consumption; the working conditions corresponding to the current instantaneous energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell for vehicle running is not started, a hybrid working condition under which the fuel cell for vehicle standing is started and a hybrid working condition under which the fuel cell for vehicle running is started; the calculation formula of the current instantaneous energy consumption of the vehicle under different working conditions is as follows:
wherein, W3The current instantaneous energy consumption, W, of the vehicle corresponding to the pure electric working condition that the fuel cell is not started when the vehicle runs4For the current instantaneous energy consumption, W, of the vehicle corresponding to the hybrid operating condition in which the stationary fuel cell of the vehicle is turned on5The method comprises the steps of starting a fuel cell for running a vehicle for the current instantaneous energy consumption of the vehicle corresponding to the hybrid power working condition of starting the fuel cell, wherein v is the voltage corresponding to the time t, i is the current corresponding to the time t, l is the hydrogen consumption corresponding to the time t, tau is an integral time period, SτIs the mileage, S, corresponding to the time of tau0The mileage corresponds to the time 0.
On the basis of the average energy consumption display method of the fuel cell automobile, the invention also provides an average energy consumption display device of the fuel cell automobile, which comprises a processor and a memory, wherein the processor is used for processing instructions stored in the memory to realize the following method:
calculating the current average energy consumption of the vehicle according to different working conditions, and displaying the average energy consumption and the corresponding units thereof; the working conditions corresponding to the current average energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell is not started and a hybrid power working condition under which the fuel cell is started; the calculation formula of the current average energy consumption of the vehicle under different working conditions is as follows:
wherein, W1The current average energy consumption, W, of the vehicle corresponding to the pure electric working condition that the fuel cell is not started2Current average energy consumption, Q, of a vehicle corresponding to a hybrid operating condition in which a fuel cell is ont2Power consumption, Q, corresponding to time t2t1Power consumption corresponding to time t1, Lt2Is the hydrogen consumption corresponding to time t2, Lt1Is the hydrogen consumption corresponding to time t1, St2Is the mileage corresponding to the time t2, St1The mileage corresponds to the time t 1.
On the basis of the instantaneous energy consumption display method of the fuel cell automobile, the invention also provides an instantaneous energy consumption display device of the fuel cell automobile, which comprises a processor and a memory, wherein the processor is used for processing instructions stored in the memory to realize the following method:
calculating the current instantaneous energy consumption of the vehicle according to different working conditions, and displaying the instantaneous energy consumption and units corresponding to the instantaneous energy consumption; the working conditions corresponding to the current instantaneous energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell for vehicle running is not started, a hybrid working condition under which the fuel cell for vehicle standing is started and a hybrid working condition under which the fuel cell for vehicle running is started; the calculation formula of the current instantaneous energy consumption of the vehicle under different working conditions is as follows:
wherein, W3The current instantaneous energy consumption, W, of the vehicle corresponding to the pure electric working condition that the fuel cell is not started when the vehicle runs4For the current instantaneous energy consumption, W, of the vehicle corresponding to the hybrid operating condition in which the stationary fuel cell of the vehicle is turned on5The current instantaneous energy consumption of the vehicle corresponding to the hybrid power working condition of the fuel cell start of the vehicle operation is represented by v, i and l, wherein v is the voltage corresponding to the time t, i is the current corresponding to the time t and l is the current corresponding to the time tτ is the integration period, SτIs the mileage, S, corresponding to the time of tau0The mileage corresponds to the time 0.
The invention has the beneficial effects that: according to the working condition that the fuel cell is not started to be purely electric and the working condition that the fuel cell is started to be mixed with power, the accurate data of the vehicle energy consumption is calculated and displayed according to the working conditions, and the driver can know the vehicle energy consumption conditions under different working conditions in real time, so that the driver can be helped to develop good driving habits, and energy-saving driving is realized.
Drawings
FIG. 1 is a flow chart of an average power consumption display method of a fuel cell vehicle according to the present invention;
FIG. 2 is a hardware connection diagram implementing a power consumption display for a fuel cell vehicle;
fig. 3 is a flowchart of an instantaneous power consumption display method of a fuel cell vehicle of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention provides an average energy consumption display device of a fuel cell automobile, which comprises a processor and a memory, wherein the processor is used for processing instructions stored in the memory so as to realize an average energy consumption display method of the fuel cell automobile, and a flow chart of the steps of the average energy consumption display method is shown in figure 1 and comprises the following steps:
(1) and calculating the current average energy consumption of the vehicle according to different working conditions, and matching corresponding units for the average energy consumption under different working conditions.
Namely, the current average energy consumption of the vehicle is accurately calculated under each subdivision working condition, and meanwhile, the energy consumption display units under different working conditions are different, and the different working conditions are matched with the current appropriate energy consumption units. In the process of realizing the average energy consumption calculation, the vehicle controller, the display instrument and the vehicle CAN network CAN be used for realizing the calculation, as shown in fig. 2, a strategy layer of the vehicle controller calculates the average energy consumption under different working conditions, meanwhile, the corresponding energy consumption unit codes are matched for the average energy consumption under different working conditions, and then, the average energy consumption value and the corresponding unit codes are sent to the bottom layer of the vehicle controller. The bottom layer of the vehicle controller appoints different digital codes to represent different units in a communication protocol, and simultaneously sends average energy consumption data and energy consumption units matched with the data to a vehicle CAN network.
The working conditions corresponding to the calculation of the current average energy consumption of the vehicle comprise two working conditions, namely a pure electric working condition under which the fuel cell is not started and a hybrid power working condition under which the fuel cell is started. Specifically, in order to realize the calculation of the current average energy consumption of the vehicle corresponding to the pure electric working condition that the fuel cell is not started, the power consumption is sent by the BMS through the whole vehicle CAN network, and the bottom layer of the whole vehicle controller is analyzed and then transmitted to the strategy layer for calculation; the mileage is sent by a display instrument through a whole vehicle CAN network, the bottom layer of the whole vehicle controller is analyzed and then transmitted to a strategy layer for calculation, and the calculation formula is as follows:
W1＝(Qt2-Qt1)/(St2-St1)
wherein, W1The current average energy consumption, Q, of the vehicle corresponding to the pure electric working condition that the fuel cell is not startedt2Power consumption, Q, corresponding to time t2t1Is the power consumption corresponding to the time t1, St2Is the mileage corresponding to the time t2, St1The mileage corresponds to the time t 1.
In order to realize the calculation of the current average energy consumption of the vehicle corresponding to the hybrid power working condition of starting the fuel cell, the hydrogen consumption is sent by the hydrogen system controller through the whole vehicle CAN network, and the bottom layer of the whole vehicle controller is analyzed and then transmitted to the strategy layer for calculation; the mileage is sent by a display instrument through a whole vehicle CAN network, the bottom layer of the whole vehicle controller is analyzed and then transmitted to a strategy layer for calculation, a fixed value is obtained according to an empirical value t2-t1, the strategy layer refreshes the current average energy consumption value according to the calculation frequency, and the calculation formula is as follows:
W2＝(Lt2-Lt1)/(St2-St1)
wherein, W2Current average energy consumption, L, of the vehicle for a hybrid operating condition in which the fuel cell is ont2Is the hydrogen consumption corresponding to time t2, Lt1Is the hydrogen consumption corresponding to time t1, St2Is the mileage corresponding to the time t2, St1The mileage corresponds to the time t 1.
For the two working conditions corresponding to the calculated current average energy consumption of the vehicle, the unit corresponding to the calculated current average energy consumption of the vehicle under the pure electric working condition that the fuel cell is not started is kilowatt-hour/100 kilometers, namely kWh/100 km; the unit corresponding to the current average energy consumption of the vehicle calculated under the hybrid power working condition that the fuel cell is started is kilogram/100 kilometers, namely kg/100 km.
(2) And displaying the average energy consumption and the corresponding units thereof.
The vehicle display instrument synchronously analyzes the current average energy consumption and the corresponding units under different working conditions from the whole vehicle CAN network, and displays the current average energy consumption and the corresponding units on a front-end interface of the display instrument for a driver to read.
The invention also provides an instantaneous energy consumption display device of a fuel cell automobile, which comprises a processor and a memory, wherein the processor is used for processing instructions stored in the memory to realize an instantaneous energy consumption display method of the fuel cell automobile, and a flow chart of the steps of the instantaneous energy consumption display method is shown in figure 3 and comprises the following steps:
1) and calculating the current instantaneous energy consumption of the vehicle according to different working conditions, and matching corresponding units with the instantaneous energy consumption under different working conditions.
Namely, the current instantaneous energy consumption of the vehicle is accurately calculated under each subdivision working condition, and meanwhile, the displayed units of the instantaneous energy consumption under different working conditions are different, and the different working conditions are matched with the current proper energy consumption units. In the process of realizing instantaneous energy consumption calculation, the instantaneous energy consumption CAN be realized by adopting the cooperative cooperation of the whole vehicle controller, the display instrument and the whole vehicle CAN network, as shown in fig. 2, the strategy layer of the whole vehicle controller calculates the instantaneous energy consumption under different working conditions, meanwhile, the corresponding energy consumption unit codes are matched aiming at the instantaneous energy consumption under different working conditions, and then, the instantaneous energy consumption value and the corresponding unit codes are sent to the bottom layer of the whole vehicle controller. The bottom layer of the vehicle controller appoints different digital codes to represent different units in a communication protocol, and simultaneously sends instantaneous energy consumption data and energy consumption units matched with the data to a vehicle CAN network.
The working conditions corresponding to the calculation of the current instantaneous energy consumption of the vehicle comprise three working conditions, namely a pure electric working condition under which the fuel cell for vehicle operation is not started, a hybrid working condition under which the fuel cell for vehicle rest is started and a hybrid working condition under which the fuel cell for vehicle operation is started. In order to realize the instantaneous energy consumption calculation under the pure electric condition that a fuel cell is not started when a vehicle runs, the instantaneous energy consumption of a second level or a millisecond level is integrated and then is divided by the mileage difference of the time period to obtain instantaneous energy consumption data, the specific calculation formula is as follows:
wherein, W3For the current instantaneous energy consumption of the vehicle corresponding to the pure electric working condition that the fuel cell is not started when the vehicle runs, v is the voltage corresponding to the time t, i is the current corresponding to the time t, tau is the integral time period, SτIs the mileage, S, corresponding to the time of tau0The mileage corresponds to the time 0, and the time 0 is the integration start time.
In order to realize the calculation of energy consumption under the working condition of hybrid power of a vehicle under the condition of starting a static fuel cell and the instantaneous hydrogen consumption of integral second level or millisecond level, the instantaneous hydrogen consumption data is sent to a whole vehicle CAN network by a fuel cell system, and the bottom layer of a whole vehicle controller is analyzed and then transmitted to a strategy layer to participate in calculation, the specific calculation formula is as follows:
wherein, W4And l is the hydrogen consumption corresponding to the time t, and tau is the integral time period.
In order to realize the calculation of the current instantaneous energy consumption of the vehicle corresponding to the hybrid power working condition of starting the fuel cell during the running of the vehicle, the instantaneous hydrogen consumption of the same integral second level or millisecond level is calculated, and then the instantaneous hydrogen consumption data is obtained by dividing the integral second level or millisecond level by the mileage difference of the time period, wherein the specific calculation formula is as follows:
wherein, W5For the current instantaneous energy consumption of the vehicle corresponding to the hybrid power working condition of starting the fuel cell during the running of the vehicle, l is the hydrogen consumption corresponding to the time t, tau is an integral time period, SτIs the mileage, S, corresponding to the time of tau0The mileage corresponds to the time 0, and the time 0 is the integration start time.
For the three working conditions corresponding to the calculated current instantaneous energy consumption of the vehicle, the unit corresponding to the calculated instantaneous energy consumption under the pure electric working condition that the vehicle runs and the fuel cell is not started is kilowatt-hour/100 kilometers, namely kWh/100 km; the unit corresponding to the calculated instantaneous energy consumption under the hybrid power working condition that the vehicle is in a static state and the fuel cell is started is kilogram/hour, namely kg/h; the unit corresponding to the calculated instantaneous energy consumption under the hybrid power working condition that the vehicle runs and the fuel cell is started is kilogram/100 kilometers, namely kilogram/100 km.
2) And displaying the instantaneous energy consumption and the corresponding units thereof.
The vehicle display instrument synchronously analyzes the current instantaneous energy consumption data and the corresponding units under different working conditions from the whole vehicle CAN network, and displays the data on a front-end interface of the display instrument for a driver to read.
It should be noted that the average energy consumption display method and the instantaneous energy consumption display method may be implemented simultaneously, or one of them may be implemented selectively. In order to realize the average energy consumption display method and the instantaneous energy consumption display method of the fuel cell automobile, a controller module can be specially arranged, the controller module can acquire data information related to energy consumption calculation, such as whole automobile working condition information, power battery information, hydrogen consumption and the like, and can calculate energy consumption and match corresponding units according to the information according to working conditions and send the information to a vehicle display instrument for display.
In addition, when the data is displayed, whether the unit corresponding to the average energy consumption and the instantaneous energy consumption data is displayed or not can be selected according to the situation. For example, when the energy consumption data is displayed on one screen, unit information corresponding to the energy consumption data can be displayed in order to distinguish the data under different working conditions; when the energy consumption data are displayed on different screens, unit information does not need to be displayed under the condition that the working condition of the energy consumption data can be distinguished.
According to the characteristics of the hybrid power system, the working conditions of the fuel cell automobile are subdivided according to different energy consumption points, and meanwhile, an accurate calculation method of energy consumption under each working condition is provided, so that accurate data of average energy consumption and instantaneous energy consumption of the automobile under various working conditions can be provided for a driver of a fuel cell passenger car, the driver is helped to optimize driving habits, and the purpose of energy-saving driving is achieved.
Claims (4)
1. The average energy consumption display method of the fuel cell automobile is characterized by comprising the following steps of:
calculating the current average energy consumption of the vehicle according to different working conditions, and displaying the average energy consumption and the corresponding units thereof; the working conditions corresponding to the current average energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell is not started and a hybrid power working condition under which the fuel cell is started; the calculation formula of the current average energy consumption of the vehicle under different working conditions is as follows:
wherein, W1The current average energy consumption, W, of the vehicle corresponding to the pure electric working condition that the fuel cell is not started2Current average energy consumption, Q, of a vehicle corresponding to a hybrid operating condition in which a fuel cell is ont2Power consumption, Q, corresponding to time t2t1Power consumption corresponding to time t1, Lt2Is the hydrogen consumption corresponding to time t2, Lt1Is the hydrogen consumption corresponding to time t1, St2Is the mileage corresponding to the time t2, St1The mileage corresponds to the time t 1.
2. An instantaneous energy consumption display method of a fuel cell vehicle is characterized by comprising the following steps:
calculating the current instantaneous energy consumption of the vehicle according to different working conditions, and displaying the instantaneous energy consumption and units corresponding to the instantaneous energy consumption; the working conditions corresponding to the current instantaneous energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell for vehicle running is not started, a hybrid working condition under which the fuel cell for vehicle standing is started and a hybrid working condition under which the fuel cell for vehicle running is started; the calculation formula of the current instantaneous energy consumption of the vehicle under different working conditions is as follows:
wherein, W3The current instantaneous energy consumption, W, of the vehicle corresponding to the pure electric working condition that the fuel cell is not started when the vehicle runs4For the current instantaneous energy consumption, W, of the vehicle corresponding to the hybrid operating condition in which the stationary fuel cell of the vehicle is turned on5The method comprises the steps of starting a fuel cell for running a vehicle for the current instantaneous energy consumption of the vehicle corresponding to the hybrid power working condition of starting the fuel cell, wherein v is the voltage corresponding to the time t, i is the current corresponding to the time t, l is the hydrogen consumption corresponding to the time t, tau is an integral time period, SτIs the mileage, S, corresponding to the time of tau0The mileage corresponds to the time 0.
3. An average energy consumption display device of a fuel cell vehicle, comprising a processor and a memory, wherein the processor is used for processing instructions stored in the memory to realize the following method:
calculating the current average energy consumption of the vehicle according to different working conditions, and displaying the average energy consumption and the corresponding units thereof; the working conditions corresponding to the current average energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell is not started and a hybrid power working condition under which the fuel cell is started; the calculation formula of the current average energy consumption of the vehicle under different working conditions is as follows:
wherein, W1The current average energy consumption, W, of the vehicle corresponding to the pure electric working condition that the fuel cell is not started2Current average energy consumption, Q, of a vehicle corresponding to a hybrid operating condition in which a fuel cell is ont2Power consumption, Q, corresponding to time t2t1Power consumption corresponding to time t1, Lt2Is the hydrogen consumption corresponding to time t2, Lt1Is the hydrogen consumption corresponding to time t1, St2Is the mileage corresponding to the time t2, St1The mileage corresponds to the time t 1.
4. An instantaneous energy consumption display device of a fuel cell automobile, which is characterized by comprising a processor and a memory, wherein the processor is used for processing instructions stored in the memory to realize the following method:
calculating the current instantaneous energy consumption of the vehicle according to different working conditions, and displaying the instantaneous energy consumption and units corresponding to the instantaneous energy consumption; the working conditions corresponding to the current instantaneous energy consumption of the vehicle are calculated and comprise a pure electric working condition under which the fuel cell for vehicle running is not started, a hybrid working condition under which the fuel cell for vehicle standing is started and a hybrid working condition under which the fuel cell for vehicle running is started; the calculation formula of the current instantaneous energy consumption of the vehicle under different working conditions is as follows:
wherein, W3The current instantaneous energy consumption, W, of the vehicle corresponding to the pure electric working condition that the fuel cell is not started when the vehicle runs4For the current instantaneous energy consumption, W, of the vehicle corresponding to the hybrid operating condition in which the stationary fuel cell of the vehicle is turned on5The method comprises the steps of starting a fuel cell for running a vehicle for the current instantaneous energy consumption of the vehicle corresponding to the hybrid power working condition of starting the fuel cell, wherein v is the voltage corresponding to the time t, i is the current corresponding to the time t, l is the hydrogen consumption corresponding to the time t, tau is an integral time period, SτIs the mileage, S, corresponding to the time of tau0The mileage corresponds to the time 0.
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Application publication date: 20200214 |