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Methods for building power consumption factor model and estimating following-up driving range of electric car

A technology for power consumption and electric vehicles, applied in navigation and calculation tools, etc., can solve the problems of inaccurate estimation results, difficulty in obtaining microscopic driving parameters, and failure to take into account, and achieve the effect of simplifying input variables, increasing practicability, and accurately estimating

Inactive Publication Date: 2013-08-07
BEIJING JIAOTONG UNIV
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Problems solved by technology

The existing estimation methods do not consider the relationship between the real traffic state and the driving range of electric vehicles, making the estimation results inaccurate
In view of the difficulty in obtaining microcosmic driving parameters such as instantaneous speed and acceleration, the present invention proposes a method for estimating the driving range of electric vehicles based on the average speed of road sections, which enhances the practicability of the method

Method used

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  • Methods for building power consumption factor model and estimating following-up driving range of electric car
  • Methods for building power consumption factor model and estimating following-up driving range of electric car
  • Methods for building power consumption factor model and estimating following-up driving range of electric car

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Embodiment Construction

[0019] refer to Figure 1-2 Examples of the present invention will be described.

[0020] In order to make the above objects, features and advantages more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1 As shown, the method for estimating the driving range of an electric vehicle provided in this embodiment includes the following steps:

[0022] S11. Obtain the average speed of each road section;

[0023] S12. Obtain a planned path;

[0024] S13. Extract the average speed of the corresponding road section of the planned path according to the pre-acquired planned path and the future average speed of the road section , the unit is km / h; the planned path is calculated by the path planning algorithm without considering the midway charging; the future average speed of the road section can be calculated by the traffic prediction method;

[0025] S14....

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Abstract

The invention discloses methods for building a power consumption factor model and estimating following-up driving range of an electric car. The model building method comprises the following steps of: introducing aggregate variable, calculating a comprehensive variable value of per second based on the instantaneous speed and acceleration of the electric car obtained in advance; forming a basic database by combining corresponding power consumption rate of per second; dividing a driving segment according to a certain time interval; counting the mean speed of each segment; merging the comprehensive variable value of the driving segment at the same mean speed; counting a distribution law, and calculating the average power consumption rate of per kilometer, namely a power consumption factor; and determining the final electric car power consumption factor model based on the mean speed by applying a mathematical statistic method according to the counted mean speed and the power consumption factor. The invention simultaneously discloses a method for estimating following-up driving range of the electric car.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method for establishing electric vehicle power consumption factor models and estimating mileage. Background technique [0002] With the rapid increase in the number of fuel vehicles, the environmental pollution caused by fuel vehicles and the problem of global fuel depletion are also becoming more and more serious. Electric vehicles have received more and more attention because of their low energy consumption, low noise, high energy efficiency, simple structure and easy maintenance. At present, electric vehicles are limited by battery capacity and mileage, and need to be recharged many times during travel. Therefore, reasonable route planning and navigation are particularly necessary. As a prerequisite for electric vehicle path planning and navigation, accurate driving range estimation has also attracted more and more attention. The existing estimation methods do no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
Inventor 姚恩建杨扬宋媛媛杨志强
Owner BEIJING JIAOTONG UNIV
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