Double adaptive power allocation strategy in electric vehicles with battery/supercapacitor hybrid energy storage system

Abstract

Summary This paper proposes a new energy management strategy (EMS) for electric vehicles (EVs) with battery/supercapacitor hybrid energy storage systems (HESS). Firstly, the battery/supercapacitor HESS configuration and obtaining the load current from the driving cycle are comprehensively explained. Secondly, fixed and adaptive frequency‐based (AFB) EMS are discussed in detail. In the proposed method, the current demanded by the load is separated into low and high‐frequency components with the help of an adaptive low‐pass filter (A‐LPF). In addition, adaptive battery current (ABC) is generated according to the supercapacitor (SC) state of charge (SoC), and a double adaptive power allocation strategy is performed. The proposed method is compared with the AFB‐EMS for load currents, load powers, DC link voltages, filter cut‐off frequencies, battery, and SC SoCs on the UDDS driving cycle. When the obtained results were evaluated together, it was observed that the proposed method completed the driving cycle with a higher battery SoC and realized the adaptive cut‐off frequency in a narrower band.

Prediction of Electric Vehicle Driving Range and Performance Characteristics: A Review on Analytical Modeling Strategies With Its Influential Factors and Improvisation Techniques

“…Also, the use of high-power density and current capability power sources such as supercapacitor and fuel cells with an appropriate energy management strategy improves the DR, acceleration and gradeability by minimizing the EC and Mv. This can be justified by higher current capability, powertrain and charging efficiency of super-capacitor and fuel cells [247,248]. Further, the use of control strategies like PWM, pulse amplitude modulation (PAM) and bang-bang type current control with a super-capacitor and fuel cell improves the DR of EV by minimising the power converter losses [249,250].…”

An overview of frequency‐based power split strategies in electric vehicles with battery/supercapacitor hybrid energy storage system

“…In the study of Çorapsız and Kahveci, 80 an adaptive filter is proposed in which the cut‐off frequency is determined according to the load current and the supercapacitor SoC. In addition, the battery current has been adapted according to the amplitude of the supercapacitor SoC.…”

“…As seen in Figure 13, with this method, active and reactive power flow can be controlled separately by splitting the grid current into frequency components with LPF and HPF. 79 In the study of Çorapsız and Kahveci, 80 an adaptive filter is proposed in which the cut-off frequency is determined according to the load current and the supercapacitor SoC. In addition, the battery current has been adapted according to the amplitude of the supercapacitor SoC.…”

Real-Time Predictive Energy-Saving Control for Electric Vehicle Based on Road Slope Prediction

“…Currently, electric vehicles and autonomous vehicles are hot topics for the vehicle industry and for researchers [1][2][3]. Motivated by these trends, advanced driving assistance systems (ADAS) have been rapidly developing in recent decades.…”