CN111660869A - Electric vehicle power consumption calculation method, vehicle control unit, system and vehicle - Google Patents
Electric vehicle power consumption calculation method, vehicle control unit, system and vehicle Download PDFInfo
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- CN111660869A CN111660869A CN201911282694.1A CN201911282694A CN111660869A CN 111660869 A CN111660869 A CN 111660869A CN 201911282694 A CN201911282694 A CN 201911282694A CN 111660869 A CN111660869 A CN 111660869A
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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
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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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
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/50—Control modes by future state prediction
- B60L2260/54—Energy consumption estimation
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Power Engineering (AREA)
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- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses an electric vehicle power consumption calculation method, a whole vehicle controller, an electric vehicle power consumption calculation system and an automobile. When the hundred kilometers of electricity consumption of the electric vehicle is calculated, only when the gear signal of the electric vehicle is a forward gear signal or a reverse gear signal (the vehicle is in a non-static state), the electricity consumption of the electric vehicle in each mileage interval is calculated according to the driving mileage data of the electric vehicle and the electric signal of the power battery in each mileage interval. The method avoids the phenomenon that the power consumption of the electric automobile in a static state is included in the power consumption data of the electric automobile in the running process, the mileage block can be divided into the blocks taking hundred kilometers as a unit, the accuracy of the calculation result of the hundred kilometers of the electric automobile is improved, and the method has a representative meaning for evaluating the running power consumption condition of the whole automobile and estimating the remaining cruising mileage of the electric automobile.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a power consumption calculation method of an electric vehicle, a vehicle control unit, a system and a vehicle.
Background
The average power consumption of the electric automobile in hundred kilometers can visually evaluate the running power consumption condition of the whole automobile, and the remaining endurance mileage of the electric automobile is estimated. At present, the method for calculating the electricity consumption per kilometer of an electric vehicle is to perform division operation on the accumulated consumed electric energy and the total driving mileage of the electric vehicle, and then amplify the electric energy per kilometer in an equal proportion to obtain the electricity consumption per kilometer of the electric vehicle.
Disclosure of Invention
The invention aims to solve the problem that the accuracy of the calculation result of the hundred-kilometer average power consumption of the electric vehicle in the prior art is low. Therefore, the invention provides the electric vehicle power consumption calculation method, the whole vehicle controller, the system and the vehicle, improves the accuracy of the calculation result of the electric vehicle power consumption per hundred kilometers, and has more representative significance for evaluating the whole vehicle running power consumption condition and predicting the remaining endurance mileage of the electric vehicle.
In order to solve the above problems, an embodiment of the present invention discloses a method for calculating power consumption of an electric vehicle, including: acquiring a gear signal of an electric automobile, and executing the following steps when the gear signal is a forward gear signal or a reverse gear signal:
acquiring the driving mileage data of the electric automobile and electric signals of a power battery, wherein the electric signals comprise voltage signals and current signals;
dividing the driving mileage of the electric automobile into mileage sections with preset lengths;
determining the time required by the electric automobile to travel the mileage of the mileage block section and the starting time and the ending time of the mileage block section;
integrating the voltage signal and the current signal within the starting time and the ending time according to the power consumption integral coefficient of the electric automobile and the time to obtain the power consumption of the mileage of the power battery in the mileage interval;
and when the gear signal is a forward gear signal or a reverse gear signal, the power consumption integral coefficient is constant 1.
Further, in some embodiments of the present invention, dividing the mileage of the electric vehicle into mileage sections with preset lengths includes:
counting the total driving mileage of the electric automobile from the moment when the total driving mileage data of the electric automobile is zero to the current moment;
acquiring the driving mileage data of the electric automobile in real time from the moment when the total driving mileage is zero;
when the driving mileage data reaches the preset value, dividing the driving mileage data of the electric automobile into a first mileage interval;
taking the driving mileage data as a critical point when reaching the preset value, and acquiring the total driving mileage of the electric automobile in real time from the critical point;
when the difference value between the total mileage of the automobile and the mileage data of the first mileage block section reaches the preset value from the critical point, dividing the total mileage data of the electric automobile into two block sections, wherein the two block sections comprise the first mileage block section and the second mileage block section, and the sum of the mileage data of the first mileage block section and the second mileage block section is equal to the total mileage data;
and when the gear signal of the electric automobile is the forward gear signal or the reverse gear signal, circularly executing the steps to obtain a plurality of mileage intervals.
Further, in some embodiments of the present invention, the electric vehicle power consumption calculation method further includes:
when the gear signal of the electric automobile is the forward gear signal or the reverse gear signal, acquiring the average speed, the running gradient and the road running resistance of the electric automobile in each mileage interval;
determining a weighting coefficient of each mileage interval according to the average vehicle speed, the running gradient and the preset table of the road running resistance;
and calculating the average power consumption of the electric automobile by using the power consumption and the weighting coefficient of each mileage interval and the number of the mileage intervals up to the current moment.
Further, in some embodiments of the present invention, the average power consumption is calculated using the following formula:
the P isavgFor the average power consumption, the EiFor the power consumption of the ith mileage interval, ZiIs the weighting coefficient of the ith mileage block section, and n is the number of the mileage block sections.
Further, in some embodiments of the present invention, the electric vehicle power consumption calculation method further includes:
after the power consumption of the mileage of the power battery in the mileage interval is obtained, judging whether the power consumption is in a reference value range;
if yes, the power consumption is valid data and is reserved;
if not, the power consumption is invalid data and is discarded, and the power consumption is recalculated.
Further, in some embodiments of the present invention, the mileage block section includes one hundred kilometers of mileage.
Further, in some embodiments of the present invention, the power consumption of the mileage of the power battery driving the mileage section is calculated by using the following formula:
said EiFor the power consumption of the ith mileage section, T1Is the starting time of the mileage block section, the T2And the current signal is the end time of the mileage interval, the power consumption integral coefficient A, the voltage signal U and the current signal I.
Further, an embodiment of the present invention discloses a vehicle control unit, including:
the acquisition module is used for acquiring gear signals of the electric automobile and executing the following steps when the gear signals are forward gear signals or reverse gear signals:
the acquisition module is used for acquiring the driving mileage data of the electric automobile and electric signals of a power battery, wherein the electric signals comprise voltage signals and current signals;
the division module is used for dividing the driving mileage of the electric automobile into mileage sections with preset lengths;
the determining module is used for determining the time required by the electric automobile to travel the mileage of the mileage block section and the starting time and the ending time of the mileage block section;
the integration module is used for integrating the voltage signal and the current signal within the starting time and the ending time according to the power consumption integration coefficient of the electric automobile and the time to obtain the power consumption of the mileage data of the mileage section driven by the power battery;
and when the gear signal is a forward gear signal or a reverse gear signal, the power consumption integral coefficient is constant 1.
Further, an embodiment of the present invention discloses an electric vehicle power consumption calculation system, including: the system comprises a vehicle control unit, a battery management system and an instrument panel;
the battery management system is used for acquiring a voltage signal and a current signal of the power battery;
the instrument panel is used for collecting the driving mileage data of the electric automobile;
the vehicle control unit is respectively connected with the battery management system and the instrument panel and is used for executing the steps of the electric vehicle power consumption calculation method.
Further, the embodiment of the invention discloses that the vehicle control unit, the instrument panel and the battery management system are communicated through a CAN bus.
Further, an embodiment of the present invention discloses an automobile, including: the electric vehicle power consumption calculation system as described in any one of the above.
The invention discloses an electric vehicle power consumption calculation method, a vehicle control unit, an electric vehicle power consumption calculation system and an automobile, which have the following beneficial effects:
when the hundred kilometers of electricity consumption of the electric vehicle is calculated, only when the gear signal of the electric vehicle is a forward gear signal or a reverse gear signal (the vehicle is in a non-static state), the electricity consumption of the electric vehicle in each mileage interval is calculated according to the driving mileage data of the electric vehicle and the electric signal of the power battery in each mileage interval. The method avoids the phenomenon that the power consumption of the electric automobile in a static state is included in the power consumption data of the electric automobile in the running process, the mileage block can be divided into the blocks taking hundred kilometers as a unit, the accuracy of the calculation result of the hundred kilometers of the electric automobile is improved, and the method has a representative meaning for evaluating the running power consumption condition of the whole automobile and estimating the remaining cruising mileage of the electric automobile.
Additional features and corresponding advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic flow chart of a method for calculating power consumption of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating another method for calculating power consumption of an electric vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a method for calculating power consumption of an electric vehicle according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a vehicle control unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electric vehicle power consumption calculation system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the electric automobile, the average power consumption of hundred kilometers is an important index of the electric automobile, the running power consumption condition of the whole automobile can be visually evaluated, and the remaining endurance mileage of the electric automobile can be estimated. At present, the method for calculating the electricity consumption per kilometer of an electric vehicle is to perform division operation on the accumulated consumed electric energy and the total driving mileage of the electric vehicle, and then amplify the electric energy per kilometer in an equal proportion to obtain the electricity consumption per kilometer of the electric vehicle.
Acquiring driving mileage data of the electric automobile and electric signals of a power battery by acquiring gear signals of the electric automobile and taking the gear signals as forward gear signals or reverse gear signals when hundreds of kilometers of electricity is consumed, wherein the electric signals comprise voltage signals and current signals; dividing the driving mileage of the electric automobile into mileage sections with preset lengths; determining the time required by the mileage of the electric automobile in the mileage section and the starting time and the ending time of the mileage of the electric automobile in the mileage section; and integrating the voltage signal and the current signal within the starting time and the ending time according to the power consumption integral coefficient and the time of the electric automobile to obtain the power consumption of the mileage of the power battery in the section.
When the technical scheme is adopted to calculate the electricity consumption of the electric vehicle in hundred kilometers, the electricity consumption of the electric vehicle in each mileage interval section is calculated according to the driving mileage data of the electric vehicle and the electric signal of the power battery in each mileage interval section only when the gear signal of the electric vehicle is a forward gear signal or a reverse gear signal (the vehicle is in a non-static state). The method avoids the phenomenon that the power consumption of the electric automobile in a static state is included in the power consumption data of the electric automobile in the running process, the mileage block can be divided into the blocks taking hundred kilometers as a unit, the accuracy of the calculation result of the hundred kilometers of the electric automobile is improved, and the method has a representative meaning for evaluating the running power consumption condition of the whole automobile and estimating the remaining cruising mileage of the electric automobile.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for calculating power consumption of an electric vehicle according to an embodiment of the present invention, and the method includes the following specific steps:
s10: acquiring a gear signal of the electric automobile, and executing the following steps when the gear signal is a forward gear signal or a reverse gear signal:
specifically, in some embodiments of the present application, a gear signal of the electric vehicle may be collected by the transmission. After the gear signal is collected by the gearbox, the gear signal is transmitted to the vehicle control unit through the CAN bus for the vehicle control unit to use.
S11: and acquiring the driving mileage data of the electric automobile and electric signals of the power battery, wherein the electric signals comprise voltage signals and current signals.
In some embodiments of the present application, information such as a charging state of a battery of the electric vehicle may also be acquired as a factor.
S12: and dividing the driving mileage data of the electric automobile into mileage sections with preset lengths.
Specifically, in some embodiments of the present application, the driving range data refers to driving range of the electric vehicle, the driving range of the electric vehicle is 0 km when the electric vehicle is just delivered from a factory, the driving range of the electric vehicle changes with the increase of the service time of the electric vehicle after the electric vehicle is put into service, and the driving range data of the electric vehicle can be divided into a plurality of sections with a preset value of one hundred kilometers, so as to count power consumption required by each one hundred kilometers when the electric vehicle is in a driving state.
Specifically, in some embodiments of the present application, step S12 includes:
counting the total driving mileage of the electric automobile from the moment when the total driving mileage data is zero to the current moment; acquiring the driving mileage data of the electric automobile in real time from the moment when the total driving mileage is zero; when the driving mileage data reaches a preset value, dividing the driving mileage data of the electric automobile into a first mileage interval;
in some embodiments of the present application, the preset value may be one hundred kilometers, and the kilometers of each mileage block may be one hundred kilometers.
Taking the driving mileage data as a critical point when the driving mileage data reaches a preset value, and acquiring the total driving mileage of the electric automobile in real time from the critical point;
when the difference value between the total driving mileage of the automobile and the driving mileage data of the first mileage block section reaches a preset value from a critical point, dividing the total driving mileage data of the electric automobile into two block sections, wherein the two block sections comprise the first mileage block section and the second mileage block section, and the sum of the driving mileage data of the first mileage block section and the second mileage block section is equal to the total driving mileage data;
and when the gear signal of the electric automobile is a forward gear signal or a reverse gear signal, circularly executing the steps to obtain a plurality of mileage intervals.
The mileage of the mileage block section is one hundred kilometers.
For example, after the automobile leaves the factory and is put into use, starting from zero travel number, when the travel number of the automobile is one hundred kilometers, dividing the first one hundred kilometers into a first mileage interval section; and then starting from the first hundred kilometers, dividing a second one hundred kilometers between the first one hundred kilometers and the second one hundred kilometers into a second mileage section when the number of the automobile runs reaches two hundred kilometers, and sequentially circulating the processes along with the use of the automobile to divide the number of the automobile runs from zero number of the automobile to the current time into a plurality of sections.
And S13, determining the time required by the mileage of the electric automobile driving mileage block section and the starting time and the ending time of the mileage of the driving mileage block section.
In some embodiments of the present application, the time at which each mileage block begins and the time at which it ends are recorded to determine the time required for the electric vehicle to travel mileage of the mileage block.
S14: and integrating the voltage signal and the current signal within the starting time and the ending time according to the power consumption integral coefficient and the time of the electric automobile to obtain the power consumption of the mileage of the power battery in the section.
In some embodiments of the present application, the power consumption integral coefficient of the electric vehicle may be determined according to whether the electric vehicle is in a driving state, when the electric vehicle is in the driving state (i.e., the gear signal is a forward gear signal or a reverse gear signal), the power consumption integral coefficient of the electric vehicle is 1, and when the electric vehicle is in a stationary state (i.e., the gear signal is not a forward gear signal or a reverse gear signal), the power consumption integral coefficient of the electric vehicle is 0, so that when the electric vehicle is in the stationary state, electric energy consumed by high-voltage loads such as an air conditioner compressor and a heating resistance wire of the vehicle does not account for the power consumption of the electric vehicle in the driving state, thereby improving the accuracy of the calculation result of the hundred kilometers of the average power consumption.
In some embodiments of the present application, the power consumption of mileage of the power battery mileage block is calculated by the following formula:
Eipower consumption for the ith mileage interval, T1Is the starting time of the mileage interval, T2And at the end time of the mileage interval, A is the power consumption integral coefficient, U is a voltage signal, and I is a current signal.
When the gear signal is a forward gear signal or a reverse gear signal, the power consumption integral coefficient is constant 1.
Further, in some embodiments of the present application, the power consumption of the electric vehicle changes along with the difference of the average vehicle speed, the driving condition, and the like of the electric vehicle, and in order to compensate the power consumption of the electric vehicle under different conditions to reduce the error of the calculated power consumption of hundreds of kilometers, please refer to fig. 2, where fig. 2 is a schematic flow chart of another method for calculating the power consumption of the electric vehicle disclosed in the embodiment of the present application, and the method further includes:
s20: when the gear signal of the electric automobile is a forward gear signal or a reverse gear signal, acquiring the average speed, the running gradient and the road running resistance of the electric automobile in each mileage interval;
s21: determining a weighting coefficient of each mileage interval according to a preset table of average vehicle speed, running gradient and road running resistance;
specifically, the weighting coefficient is generally obtained from a plurality of times of experimental test data of the real vehicle, and is prestored in the vehicle controller.
S22: and calculating the average power consumption of the electric automobile by using the power consumption and the weighting coefficient of each mileage interval and the number of the mileage intervals up to the current moment.
Specifically, in some embodiments of the present application, the average power consumption is calculated using the following formula:
Pavgto average power consumption, EiFor the power consumption of the ith mileage interval, ZiIs the weighting coefficient of the ith mileage block section, and n is the number of the mileage block sections.
Further, in some embodiments of the present application, after the power consumption of the mileage section is obtained, the power consumption of the mileage section obtained is not an actual value due to environmental interference or a calculation failure, and an error is large, so that the obtained failed power consumption value is not put into use to bring unnecessary loss. As shown in fig. 3, fig. 3 is a schematic flow chart of a method for calculating power consumption of an electric vehicle according to an embodiment of the present invention, and after power consumption of mileage of a power battery is obtained, the method further includes:
s30: judging whether the power consumption is in a reference value range; if so, the process proceeds to S31, and if not, the process proceeds to S32.
S31: the power consumption is valid data and reserved;
s32: the power consumption is invalid data and discarded, and the power consumption is recalculated.
In some embodiments of the present application, for each hundred kilometers of the time interval, a minimum power consumption and a maximum power consumption are respectively set, and the minimum power consumption and the maximum power consumption are used as reference value ranges, which may be stored in a storage unit of the vehicle controller, where the minimum power consumption may be obtained according to a state that the vehicle is in a flat road (with a slope of zero) and is traveling at a constant speed, and the resistance is minimum, and the maximum power consumption may be determined according to a power consumption of the vehicle when the vehicle is traveling at a maximum allowable slope and with a maximum load. And after the power consumption value exceeds the reference value range, the calculated power consumption value of hundred kilometers is not credible and needs to be recalculated. It is understood that the reference value range may also be set according to different and practical situations of the type of the electric vehicle, and the embodiment of the present invention is not described herein again.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a vehicle control unit provided in this embodiment, where the vehicle control unit shown in fig. 4 includes:
the acquisition module 40 is configured to acquire a gear signal of the electric vehicle, and when the gear signal is a forward gear signal or a reverse gear signal, perform the following steps:
the acquiring module 41 is used for acquiring the driving mileage data of the electric automobile and electric signals of the power battery, wherein the electric signals comprise voltage signals and current signals;
the dividing module 42 is used for dividing the driving mileage of the electric automobile into mileage intervals with preset lengths;
the determining module 43 is configured to determine time required by the mileage of the electric vehicle in the mileage section and start time and end time of the mileage of the electric vehicle in the mileage section;
the integration module 44 is used for integrating the voltage signal and the current signal in the starting time and the ending time according to the power consumption integration coefficient and the time of the electric automobile to obtain the power consumption of the mileage data in the power battery driving mileage section;
when the gear signal is a forward gear signal or a reverse gear signal, the power consumption integral coefficient is constant 1.
Fig. 5 is a schematic structural diagram of an electric vehicle power consumption calculating system disclosed in the embodiment of the present invention, where the electric vehicle power consumption calculating system includes a vehicle control unit 50, a battery management system 51, and an instrument panel 52;
the battery management system 51 is used for acquiring voltage signals and current signals of the power battery;
the instrument panel 52 is used for collecting the driving mileage data of the electric automobile;
the vehicle control unit 50 is connected to a battery management system 51 and an instrument panel 52.
The vehicle control unit 50 communicates with the instrument panel 52 and the battery management system 51 through the CAN bus.
In some embodiments of the present application, after the power consumption of hundreds kilometers is obtained by the above electric vehicle power consumption calculation method, the power consumption may be displayed on the instrument panel 52, and in addition, the instrument panel 52 collects and displays the driving mileage of the electric vehicle.
The embodiment also provides an automobile comprising the electric vehicle power consumption calculating system.
The invention discloses an electric vehicle power consumption calculation method, a vehicle control unit, a system and an electric vehicle. The method avoids the phenomenon that the power consumption of the electric automobile in a static state is included in the power consumption data of the electric automobile in the running process, the mileage block can be divided into the blocks taking hundred kilometers as a unit, the accuracy of the calculation result of the hundred kilometers of the electric automobile is improved, and the method has a representative meaning for evaluating the running power consumption condition of the whole automobile and estimating the remaining cruising mileage of the electric automobile.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. An electric vehicle power consumption calculation method is characterized by comprising the following steps:
acquiring a gear signal of an electric automobile, and executing the following steps when the gear signal is a forward gear signal or a reverse gear signal:
acquiring the driving mileage data of the electric automobile and electric signals of a power battery, wherein the electric signals comprise voltage signals and current signals;
dividing the driving mileage data of the electric automobile into mileage sections with preset lengths;
determining the time required by the electric automobile to travel the mileage of the mileage block section and the starting time and the ending time of the mileage block section;
integrating the voltage signal and the current signal within the starting time and the ending time according to the power consumption integral coefficient of the electric automobile and the time to obtain the power consumption of the mileage of the power battery in the mileage interval;
and when the gear signal is a forward gear signal or a reverse gear signal, the power consumption integral coefficient is constant 1.
2. The electric vehicle power consumption calculation method of claim 1, wherein dividing the mileage traveled by the electric vehicle into mileage sections having a preset length comprises:
counting the total driving mileage of the electric automobile from the moment when the total driving mileage data of the electric automobile is zero to the current moment;
acquiring the driving mileage data of the electric automobile in real time from the moment when the total driving mileage is zero;
when the driving mileage data reaches the preset value, dividing the driving mileage data of the electric automobile into a first mileage interval;
taking the driving mileage data as a critical point when reaching the preset value, and acquiring the total driving mileage of the electric automobile in real time from the critical point;
when the difference value between the total mileage of the automobile and the mileage data of a first mileage block section reaches the preset value from the critical point, dividing the total mileage data of the electric automobile into two block sections, wherein the two block sections comprise the first mileage block section and a second mileage block section, and the sum of the mileage data of the first mileage block section and the second mileage block section is equal to the total mileage data;
and when the gear signal of the electric automobile is the forward gear signal or the reverse gear signal, circularly executing the steps to obtain a plurality of mileage intervals.
3. The electric vehicle electricity consumption calculation method according to claim 2, further comprising:
when the gear signal of the electric automobile is the forward gear signal or the reverse gear signal, acquiring the average speed, the running gradient and the road running resistance of the electric automobile in each mileage interval;
determining a weighting coefficient of each mileage interval according to the average vehicle speed, the running gradient and a preset table of the road running resistance;
and calculating the average power consumption of the electric automobile by using the power consumption and the weighting coefficient of each mileage interval and the number of the mileage intervals up to the current moment.
4. The electric vehicle electricity consumption calculation method according to claim 3, wherein the average electricity consumption is calculated using the following formula:
the P isavgFor the average power consumption, the EiFor the power consumption of the ith mileage interval, ZiIs the weighting coefficient of the ith mileage block section, and n is the number of the mileage block sections.
5. The electric vehicle electricity consumption calculation method according to any one of claims 1 to 4, further comprising:
after the power consumption of the mileage of the power battery in the mileage interval is obtained, judging whether the power consumption is in a reference value range;
if yes, the power consumption is valid data and is reserved;
if not, the power consumption is invalid data and is discarded, and the power consumption is recalculated.
6. The method of claim 5, wherein the mileage section includes one hundred kilometers.
7. The electric vehicle power consumption calculation method according to any one of claims 1 to 4, wherein the power consumption of the mileage of the power battery in the mileage section is calculated by the following equation:
said EiFor the power consumption of the ith mileage section, T1Is the starting time of the mileage block section, the T2Is the end time of the mileage section, the A is the power consumption integration coefficient, andand U is the voltage signal, and I is the current signal.
8. A vehicle control unit, comprising:
the acquisition module is used for acquiring a gear signal of the electric automobile and entering the following modules when the gear signal is a forward gear signal or a reverse gear signal;
the acquisition module is used for acquiring the driving mileage data of the electric automobile and electric signals of a power battery, wherein the electric signals comprise voltage signals and current signals;
the division module is used for dividing the driving mileage of the electric automobile into mileage sections with preset lengths;
the determining module is used for determining the time required by the electric automobile to travel the mileage of the mileage block section and the starting time and the ending time of the mileage block section;
the integration module is used for integrating the voltage signal and the current signal within the starting time and the ending time according to the power consumption integration coefficient of the electric automobile and the time to obtain the power consumption of the mileage data of the mileage section driven by the power battery;
and when the gear signal is a forward gear signal or a reverse gear signal, the power consumption integral coefficient is constant 1.
9. An electric vehicle electricity consumption calculation system, comprising: the system comprises a vehicle control unit, a battery management system and an instrument panel;
the battery management system is used for acquiring a voltage signal and a current signal of the power battery;
the instrument panel is used for collecting the driving mileage data of the electric automobile;
the vehicle control unit is respectively connected with the battery management system and the instrument panel and is used for executing the steps of the electric vehicle power consumption calculation method according to any one of claims 1 to 7.
10. The system of claim 9, wherein the vehicle controller communicates with the dashboard and the battery management system via a CAN bus.
11. An automobile, comprising: the electric vehicle electricity consumption calculation system according to claim 9 or 10.
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