Fast Charging Control Method for Electric Vehicle-to-Vehicle Energy Interaction Devices

Abstract

In order to reduce energy consumption and alleviate environmental pollution, the number of electric vehicles is increasing. But people are still worried about the choice of electric vehicles because of the problems of battery charging and duration. Therefore, a vehicle-to-vehicle energy interaction converter device is proposed in this paper, which has the characteristics of high-power, high-gain and small-volume. Based on the characteristics of this device, this paper uses modularized boost converter (MBC) to design this device. However, the electric vehicle battery can be divided into constant resistance loads and constant power loads (CPLs). Therein, the CPLs are very easy to cause the instability of the charging device. Therefore, a nonlinear controller combining an external nonlinear disturbance observer and an adaptive backstepping algorithm is proposed in this paper. In the first place, the high order MBC model is reduced to Brunovsky’s canonical form by using accurate feedback linearization technology in this paper. Afterwards, a nonlinear disturbance observer is designed to speed up the dynamic response of the system. At the same time, an adaptive backstepping controller is designed to ensure the stability of the output voltage in the sense of large signal by using the output of nonlinear disturbance observer. In the end, simulation and experiment results illustrate the correctness and feasibility of the converter device.