Research on energy management of hybrid energy storage system for electric bus

Abstract

This article presents an energy management approach for the hybrid energy storage system in an electric bus at different temperatures. An electric bus equipped with a semi-active hybrid energy storage system is considered as the research object. According to the urban climatic characteristics of the vehicle running, the convex optimization approach considering temperature factors is proposed. The purpose of this study is to minimize the energy loss and maximize the discharge and charge depth of the super capacitor. Simulation results show that the comprehensive energy efficiency of the proposed method is 83.31% and the comprehensive energy efficiency is improved by 2.42% at 25°C, which is compared with the rule-based power allocation method based on urban driving cycle in Harbin, China. When the ambient temperature is 25°C, the comprehensive energy efficiency of the proposed method is 81.03%. This result is improved by 1.45% and the battery power variance at 25°C is reduced by 20.11% compared with the rule-based power allocation method. Therefore, the proposed power distribution method can effectively improve the functioning of an electric bus at different temperatures.

Advanced powertrain dynamic modelling and control for electrified vehicles

“…11 Considering the influence of temperature variation, the paper 'Research on energy management of hybrid energy storage system for electric bus' presents a convex optimization-based energy management approach for a semi-active hybrid energy storage system in electric bus, by which minimum energy consumption, and maximum discharge as well as charge depth of super capacitor, can be simultaneously achieved. 12 The paper 'Study on stability and handling characteristics and control of four-wheel-drive electric vehicles' investigates the stability and handling performance of four-wheel-drive electric vehicles by using cosimulation studies with Simulink and CarSim. Based on the co-simulation model, a proportion-integral-derivative controller is further developed to better adjust the torque distribution between front and rear wheels, while a sliding mode controller is designed to optimize the left-right torque distribution.…”

Layout analysis of compressed air and hydraulic energy storage systems for vehicles

“…The aggravation of environmental crisis and increasing oil shortage brings an urgent need for the development of energy-saving technology. 1 And the energy storage technology for hybrid vehicles is one of the key elements in that. 2 So far, multiple energy storage approaches have been studied.…”