Driving assistant method and system for electric vehicle

摘要

A driving assistant method for an electric vehicle is provided with the following steps. When the electric vehicle is started up, a battery energy safe driving region is calculated and displayed. The battery energy safe driving region is updated dynamically according to vehicle information. The vehicle information includes battery information of the electric vehicle.

主权项

1. A driving assistant method for an electric vehicle, comprising:
when the electric vehicle is started up, calculating and displaying a battery energy safe driving region of the electric vehicle according to driving information of the electric vehicle, wherein the driving information comprises battery information of the electric vehicle; and dynamically updating the battery energy safe driving region according to the driving information of the electric vehicle, wherein a method of defining the battery energy safe driving region comprises:
selecting at least one electricity supplying station;calculating energy consumption per unit distance of the electric vehicle and taking the at least one electricity supplying station as a center to calculate a region that the electric vehicle is capable of returning back to the at least one electricity supplying station under a current battery energy according to the energy consumption per unit distance of the electric vehicle to serve as at least one safe coverage region; anduniting the safe coverage regions with each other to obtain a united region to serve as the battery energy safe driving region when an amount of the at least one safe coverage region is larger than one, wherein the energy consumption P′ per unit distance of the electric vehicle is obtained according to an equation P′=P/ki, wherein P is energy consumption per unit distance obtained according to data of original equipment manufacturer of the electric vehicle, ki is a vehicle status-related electricity consumption coefficient.