Improved bidirectional DC/DC converter configuration with ZVS for energy storage system: analysis and implementation

This study proposes a novel design of soft‐switching based bidirectional converter for the applications in energy storage systems. By implementing an additional auxiliary circuit to the conventional non‐isolated converter, the proposed converter inherits better efficiency with minimised turn‐on losses. Moreover, auxiliary switching devices are also soft‐switched. This converter can be operated at high power outputs through ZVS turn‐on operation. The operation principle, design analysis and experimental results are reported to validate its main features in the study. Furthermore, the performance of this converter is analysed on a 1 kW laboratory prototype for both boost and buck modes.