Buck-boost converters design for ultracapacitors and lithium Battery mixing in HEV Applications
This paper presents a careful study related to a more
efficient energy management between lithium battery (with rated
voltage of 24V) and Ultracapacitors (UC) for Hybrid Electric
Vehicle (HEV) applications. This association is due to the present
trend in the field, knowing that the major drawback of the HEV
is the autonomy problem. Thus, using the Hybrid energy source
(such as UC + battery) and with a good energy management
improves the HEV performances. In this paper, battery and
Ultracapacitors (10 cells of 2.7V in series) are coupled to DC-bus
using two buck-boost converters. The main contribution of this
paper is focused on DC-bus voltage and currents control strategy
based on polynomial (RST) controller. Through some simulations
in MATLAB/Simulink software and experimental results, the
authors present an improved energy management for HEV.
Keywords- Lithium battery£ ultracapacitors£ polynomial
control£ hybrid electric vehicle.