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Driving range estimation method of electric car

A technology for electric vehicles and driving range, applied in electric vehicles, electrical devices, vehicle components, etc., can solve the problems of unconsidered changes and inaccurate estimation results.

Inactive Publication Date: 2013-07-24
BEIJING JIAOTONG UNIV
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  • Summary
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AI Technical Summary

Problems solved by technology

Most of the existing estimation methods use the current discharge current and terminal voltage of the battery as the main parameters for estimating the remaining mileage, but they do not consider the changes in the discharge current and terminal voltage under real traffic conditions in the future, making the estimation results inaccurate

Method used

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  • Driving range estimation method of electric car
  • Driving range estimation method of electric car
  • Driving range estimation method 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] The method for estimating the mileage of an electric vehicle provided in this embodiment has a process as follows figure 1 shown, including the following steps:

[0022] S1. Obtain the planned route and the future micro-traffic status of the route according to the set departure place, destination and departure time (such as predicting the traffic status of the planned route in the future by combining the traffic status historical database and the current traffic status), that is, the electric vehicle The second-by-second velocity V, the unit is m / s, the second-by-second acceleration a, the unit is m / s 2 ;

[0023] S2. Calculate comprehensive variables based on th...

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Abstract

The invention discloses a driving range estimation method of an electric car. The driving range estimation method of the electric car comprises the following steps: 1.1 a planned route and the future microcosmic traffic state of the route are obtained according to a set departure site, a destination and the departure time; 1.2 an aggregative variable is calculated based on the obtained speed per second and an acceleration; 1.3 a built electric car electricity consumption rate model is selected according to different driving conditions, and electricity consumption per second is calculated by combining the calculated aggregative variable; and 1.4 residual electric quantity of a current battery is obtained, residual energy of the battery is calculated, and residual range is obtained through circular calculation by combing the electricity consumption of the car. The driving range estimation method of the electric car takes the influence of a real traffic state on the energy consumption of the electric car into account, and overcomes the defect that the estimation result of an existing method is not accurate enough.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method for estimating the mileage of an electric vehicle. Background technique [0002] In the face of increasingly serious energy shortage and environmental degradation, pure electric vehicles have attracted widespread attention due to their advantages such as low energy consumption, zero emissions, low noise, high energy efficiency, simple structure, and easy maintenance. However, the limited battery capacity makes the driving range of electric vehicles short, and it needs to be recharged many times during the trip. Therefore, accurately estimating the driving range of an electric vehicle can enable the driver to obtain the remaining mileage of the electric vehicle in real time, and then choose a driving route reasonably and charge the vehicle in time. Most of the existing estimation methods use the current discharge current and terminal voltage of the battery as t...

Claims

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Application Information

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IPC IPC(8): B60L3/00
Inventor 姚恩建杨扬宋媛媛王梅英
Owner BEIJING JIAOTONG UNIV
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