Design and research of bi-directional DC/DC converter topology based on super capacitor energy storage system
ZENG Zhihui
XU Bo
LIU Huaqi
WEI Yanfang
YU Xiaoyang
Abstract：During the charging and discharging process of the super capacitor units,in order to meet the requirement of the precise adjustment on the output voltage of super capacitor energy storage system in the practical application and the wide range change of the terminal voltage,a novel cascaded bi-directional DC/DC Buck/Boost-LLC converter is proposed.Meanwhile,the converter can also meet the demand of pursuing the high efficiency,high power density and high reliability of the energy storage system.System efficiency is analyzed through the thermal simulation analysis of main switch device and loss calculation.The results show that this kind of topological structure is novel,and it can realize soft switching in full load range.From this point,it can substantially reduce the switching loss of the power converter and improve the working efficiency and power density of the energy storage system.Finally,the experimental study is carried out with the energy storage system of the super capacitor in IP transmitter,and the experimental results verify the feasibility and superiority of the proposed topology.
Keywords：super-capacitorstorage systembi-directional DC/DC convertertopologyefficiency
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 103-109 )