Self-learning method for remaining mileage of electric vehicle

Abstract

The invention relates to the technical field of electric automobiles, and discloses a self-learning method for the remaining mileage of an electric vehicle. The method includes the following steps: when an ahead power consumption coefficient does not exist, calculating the initial value of a power consumption coefficient to serve as the ahead power consumption coefficient, and when the ahead powerconsumption coefficient exists, obtaining the ahead power consumption coefficient; when a first difference value between current battery residual electric quantity and ahead battery residual electricquantity is greater than a first threshold value and a second difference value between current driving total mileage and ahead driving total mileage is greater than a second threshold value, calculating a current power consumption coefficient, and calculating an average power consumption coefficient according to the current power consumption coefficient and the ahead power consumption coefficient; and calculating a residual mileage value at current moment according to the average power consumption coefficient, the current battery residual electric quantity and battery health. The method has good adaptability and robustness for the difference of whole vehicle endurance mileage caused by environment temperature, driving conditions and driving habits, so that the current residual mileage ofa whole vehicle can be accurately calculated.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a self-learning method for remaining mileage of electric vehicles. Background technique [0002] The remaining mileage calculation method of traditional electric vehicles is to calculate the energy consumption according to the voltage and current integral, calculate the traveled mileage with the speed integral, and then calculate the remaining mileage according to the energy consumption, driving mileage, battery energy and remaining power. [0003] Because the voltage and current fluctuate greatly during the driving process of the vehicle, there are large fluctuations in the calculation results each time, which makes the calculation accuracy of the remaining mileage not high. In addition, the data will be cleared every time the vehicle is stopped and powered off, and the calculation can only be performed with the default value when the vehicle is powered on ...

AI Technical Summary

Problems solved by technology

The remaining mileage calculated by this method is determined by the mileage of the same state of charge last time. If the driving conditions of the previous and subsequent driving conditions are different, the calculation of the remaining mileage will be inaccurate; in addition, the power consumption of the vehicle without the air conditioner is not considered. In this working condition, the vehicle will not actually drive and the remaining mileage will decrease

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