CN109130868B - Electric automobile endurance mileage estimation method and system - Google Patents
Electric automobile endurance mileage estimation method and system Download PDFInfo
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- CN109130868B CN109130868B CN201811208723.5A CN201811208723A CN109130868B CN 109130868 B CN109130868 B CN 109130868B CN 201811208723 A CN201811208723 A CN 201811208723A CN 109130868 B CN109130868 B CN 109130868B
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
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Abstract
The invention discloses a method for estimating the endurance mileage of an electric automobile, which comprises the following steps: s1, calculating the current energy consumption of the electric automobile at regular time; s2, correcting the endurance mileage under the specified working conditions based on the changed energy consumption, wherein the working conditions comprise: urban working conditions, suburban working conditions and high-speed working conditions. The current energy consumption of the electric automobile is changed in real time, and the cruising distance is revised in real time based on the current energy consumption of the electric automobile, so that the cruising distance of the electric automobile under the current driving condition can be objectively reflected.
Description
Technical Field
The invention belongs to the technical field of the endurance mileage of electric automobiles, and provides a method and a system for estimating the endurance mileage of an electric automobile.
Background
In recent years, pure electric vehicles have developed rapidly under the support of national and local policies, and various technologies of battery systems, motor systems, vehicle control and the like of the pure electric vehicles have made obvious progress.
In the automobile industry, the technical progress and development of pure electric vehicles solve part of environmental and energy problems, but certain technical defects still exist. At present, the endurance mileage of the pure electric vehicle is the endurance mileage directly evaluating the current battery electric quantity based on the set energy consumption, the difference between the mileage displayed by the instrument and the actual mileage of the user is large, so that the user cannot predict the actual remaining driving mileage according to the mileage displayed by the instrument, and the endurance mileage display of the pure electric vehicle cannot meet the psychological needs of people.
Disclosure of Invention
The invention provides a method for estimating the endurance mileage of an electric automobile, which is used for revising the endurance mileage based on changed energy consumption and reflecting the endurance capacity under the current driving condition in real time.
In order to achieve the aim, the invention provides a method for estimating the endurance mileage of a pneumatic automobile, which comprises the following steps of:
s1, calculating the current energy consumption of the electric automobile at regular time;
s2, correcting the endurance mileage under the specified working conditions based on the changed energy consumption, wherein the working conditions comprise: urban working conditions, suburban working conditions and high-speed working conditions.
Further, the step S1 specifically includes the following steps:
s11, reading the bus voltage and the bus current of the power battery within the set mileage;
s12, calculating the consumed electric quantity E of the set driving distance,
and S13, the ratio of the electric quantity E to the set mileage is the electric quantity consumed by the driving unit distance, namely the defined energy consumption.
Further, step S1 is preceded by the following steps:
s3, detecting whether the current vehicle speed is in a speed interval of a specified working condition;
s4, if the detection result is yes, executing the step S1 to the step S2.
Further, if the detection result in the step S3 is negative, the driving range is estimated based on the maximum speed corresponding to the specified working condition.
Further, after step S2 or step S4, the method further includes:
and displaying the endurance mileage and the working condition corresponding to the endurance mileage.
The invention is realized in such a way that an estimation system based on an electric automobile endurance mileage estimation method comprises the following steps:
the system comprises a battery management system, a vehicle control unit, a working condition setting unit and a display unit, wherein the battery management system is in communication connection with the vehicle control unit, and the working condition setting unit and the display unit are in communication connection with the vehicle control unit;
the working condition setting unit is used for selecting working conditions and sending the selected working conditions to the whole vehicle controller;
the battery management system is used for recording bus voltage and bus current of the power battery and sending the bus voltage and the bus current to the whole vehicle controller;
when the current speed is in a speed interval corresponding to the selected working condition, the vehicle control unit calculates the current energy consumption of the electric vehicle based on the bus voltage and the bus current, and estimates the endurance mileage under the selected working condition;
and the display unit is used for displaying the estimated space mileage and the working condition corresponding to the endurance mileage.
Further, when the current vehicle speed is not in the speed interval corresponding to the selected working condition, the vehicle control unit estimates the endurance mileage based on the highest speed of the selected working condition.
The method and the system for estimating the cruising mileage of the electric automobile revise the cruising mileage in real time based on the current energy consumption of the electric automobile, and can truly reflect the cruising mileage under the current driving condition.
Drawings
FIG. 1 is a flowchart of a method for estimating a driving mileage of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electric vehicle driving range estimation system according to an embodiment of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for estimating a driving mileage of an electric vehicle according to an embodiment of the present invention, where the method includes the following steps:
s1, calculating the current energy consumption of the electric automobile at regular time;
in the embodiment of the invention, the method for calculating the current energy consumption of the electric automobile is evaluated based on the energy consumption in the set mileage, the set mileage is the set mileage driven before the current moment, and the method for evaluating the energy consumption based on the set mileage specifically comprises the following steps:
s11, reading the bus voltage and the bus current of the power battery within the set mileage;
and S12, calculating the electric quantity E consumed by the set driving distance, wherein the electric quantity E is calculated by integrating the product of the bus voltage and the bus current with time (the time consumed by the set driving distance).
S13, the ratio of the electric quantity E to the set mileage is the electric quantity consumed by the unit distance of driving, namely the defined energy consumption, in the embodiment of the invention, the set mileage is 5km, and the energy consumption is the ratio of the electric quantity consumed by driving 5km before the current time to the mileage of 5 km.
S2, correcting the endurance mileage under the specified working conditions based on the changed energy consumption, wherein the working conditions comprise: urban working conditions, suburban working conditions and high-speed working conditions.
In the embodiment of the invention, the specified working condition is any one of the working conditions, the driver determines the working condition based on the current driving road condition, the current energy consumption of the electric automobile is changed in real time based on the change of the speed of the automobile and the change of the electric elements in the working state in the driving process, and the cruising distance of the electric automobile is revised in real time based on the current energy consumption of the electric automobile, so that the cruising distance of the electric automobile under the current driving condition can be objectively reflected, and a user can adjust the use strategy of the electric elements as required.
In the embodiment of the present invention, before step S1, the method further includes:
s3, detecting whether the current vehicle speed is in a speed interval of a specified working condition;
the speed interval of the urban working condition is less than or equal to 60 km/h; the vehicle speed range of suburban working conditions is 60km/h to 80 km/h; the speed range of the high-speed working condition is 80km/h to 120 km/h.
And S4, if the detection result is yes, executing the step S1 to the step S2, and if the detection result is no, estimating the endurance mileage based on the highest speed corresponding to the specified working condition.
The highest speed corresponding to urban working conditions is 60km/h, and the highest speed corresponding to suburban working conditions is
80km/h, the highest speed corresponding to the high-speed working condition is 120km/h, energy consumption corresponding to the highest speed under each working condition is obtained based on simulation, and estimation of the endurance mileage is achieved.
In the embodiment of the present invention, after step S2 or step S4, the method further includes:
and displaying the endurance mileage and the working condition corresponding to the endurance mileage.
Fig. 2 is a schematic structural diagram of a mileage estimation system according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown.
The system comprises:
the battery management system, the vehicle control unit, the working condition setting unit and the display unit, the battery management system, the working condition setting unit and the display unit are all in communication connection with the vehicle control unit; wherein,
the working condition setting unit is used for selecting working conditions and sending the selected working conditions to the whole vehicle controller;
the battery management system is used for recording bus voltage and bus current of the power battery and sending the bus voltage and the bus current to the whole vehicle controller;
when the current speed is in a speed interval corresponding to the selected working condition, the vehicle control unit calculates the current energy consumption of the electric vehicle based on the bus voltage and the bus current, and estimates the endurance mileage under the selected working condition;
and the display unit displays the estimated endurance mileage and the working condition corresponding to the endurance mileage, can be integrated in the working condition selection unit, and can also be independently arranged.
In the embodiment of the invention, the energy consumption evaluation method specifically comprises the following steps:
selecting the bus voltage and the bus current of the power battery within a set mileage;
and calculating the electric quantity E consumed by the set driving distance by integrating the product of the bus voltage and the bus current with time (which is the time consumed by the set driving distance).
The ratio of the electric quantity E to the set mileage is the electric quantity consumed by the unit distance of driving, namely the defined energy consumption.
When the current vehicle speed is not in a speed interval corresponding to the selected working condition, the vehicle control unit predicts the endurance mileage based on the highest speed of the selected working condition; and acquiring energy consumption corresponding to the highest speed under each working condition based on simulation, and realizing the estimation of the endurance mileage.
The power automobile endurance mileage estimation system provided by the invention is used for revising the endurance mileage in real time based on the current energy consumption of the electric automobile, and can objectively reflect the endurance capacity under the current driving condition.
It is clear that the specific implementation of the invention is not restricted to the above-described modes, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (4)
1. The method for estimating the driving mileage of the electric automobile is characterized by comprising the following steps of:
s1, calculating the current energy consumption of the electric automobile at regular time;
s2, correcting the endurance mileage under the specified working conditions based on the changed energy consumption, wherein the working conditions comprise: urban working conditions, suburban working conditions and high-speed working conditions;
the step S1 is preceded by the steps of:
s3, detecting whether the current vehicle speed is in a speed interval of a specified working condition;
s4, if the detection result is yes, executing the step S1 to the step S2;
if the detection result in the step S3 is negative, the driving range is estimated based on the maximum speed corresponding to the specified working condition.
2. The method for estimating the driving range of the electric vehicle according to claim 1, wherein the step S1 specifically includes the following steps:
s11, reading the bus voltage and the bus current of the power battery within the set mileage;
s12, calculating the consumed electric quantity E of the set driving distance,
and S13, the ratio of the electric quantity E to the set mileage is the electric quantity consumed by the driving unit distance, namely the defined energy consumption.
3. The method for estimating driving range of an electric vehicle as claimed in claim 1, further comprising after step S2 or step S4:
and displaying the endurance mileage and the working condition corresponding to the endurance mileage.
4. An estimation system based on the electric vehicle mileage estimation method of any one of claims 1 to 3, the system comprising:
the battery management system, the working condition setting unit and the display unit are all in communication connection with the vehicle control unit;
the working condition setting unit is used for selecting working conditions and sending the selected working conditions to the whole vehicle controller;
the battery management system is used for recording bus voltage and bus current of the power battery and sending the bus voltage and the bus current to the whole vehicle controller;
when the current vehicle speed is in a speed interval corresponding to the selected working condition, the vehicle control unit calculates the current energy consumption of the electric vehicle based on the bus voltage and the bus current, and estimates the endurance mileage under the selected working condition;
and the display setting unit is used for displaying the estimated endurance mileage and the working condition corresponding to the endurance mileage.
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Families Citing this family (5)
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| CN110281812B (en) * | 2019-06-27 | 2022-08-12 | 一汽解放汽车有限公司 | Endurance mileage estimation system based on working condition identification |
| CN113030628A (en) * | 2021-04-30 | 2021-06-25 | 苏州华碧微科检测技术有限公司 | Electric automobile endurance testing method |
| CN113415209A (en) * | 2021-07-09 | 2021-09-21 | 山东元齐新动力科技有限公司 | New energy automobile driving endurance mileage prediction method, system, medium and equipment |
| CN115042629B (en) * | 2022-06-24 | 2023-05-23 | 中通客车股份有限公司 | Pure electric bus economic driving prompting method and system |
| CN115742758B (en) * | 2022-11-30 | 2023-12-15 | 成都赛力斯科技有限公司 | Method and system for calculating endurance mileage and new energy automobile |
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