Integrated Multiport Bidirectional DC-DC Converter for HEV/FCV Applications

TL;DR

This paper introduces a novel integrated multiport bidirectional DC-DC converter designed for hybrid and fuel cell vehicle applications, capable of efficiently managing multiple energy sources with fewer switches.

Contribution

It presents a new converter topology that supports multiple energy sources with bidirectional power flow, including detailed analysis, control strategy, and validation through simulations and experiments.

Findings

Supports buck and boost functions with fewer switches

Extendable to multiple inputs/outputs

Validated through simulation and experimental results

Abstract

This paper proposes a novel integrated multiport bidirectional dc-dc converter to interface the battery, the ultra-capacitor, the fuel cell, or other energy sources with the dc-link capacitor of the hybrid energy systems such as the hybrid electric vehicle (HEV) and fuel cell vehicle (FCV) applications. The proposed converter can be applied to the distributed generation systems which include local energy sources, storage, and loads. It can perform both buck and boost functions with fewer switches. In addition, it is extendable when more inputs and/or outputs are required. The operating principle and control strategy of the proposed converter will be analyzed in detail. For verification, simulation, and experimental results of the four utilized operating modes of an HEV/FCV are provided.