Power-Electronics-Based Solutions for Plug-in Hybrid Electric Vehicle Energy Storage and Management Systems

AbstractBatteries, ultracapacitors (UCs), and fuel cells arewidely being proposed for electric vehicles (EVs) and plug-inhybrid EVs (PHEVs) as an electric power source or an energystorage unit. In general, the design of an intelligent controlstrategy for coordinated power distribution is a critical issue forUC-supported PHEV power systems. Implementation of severalcontrol methods has been presented in the past, with the goal ofimproving battery life and overall vehicle efficiency. It is clearthat the control objectives vary with respect to vehicle velocity,power demand, and state of charge of both the batteries andUCs. Hence, an optimal control strategy design is the most criticalaspect of an all-electric/plug-in hybrid electric vehicle operationalcharacteristic. Although much effort has been made to improvethe life of PHEV energy storage systems (ESSs), including researchon energy storage device chemistries, this paper, on the contrary,highlights the fact that the fundamental problem lies within thedesign of power-electronics-based energy-management convertersand the development of smarter control algorithms. This paperinitially discusses battery and UC characteristics and then goeson to provide a detailed comparison of various proposed controlstrategies and proposes the use of precise power electronicconverter topologies. Finally, this paper summarizes the benefitsof the various techniques and suggests the most viable solutionsfor on-board power management, more specific to PHEVs withmultiple/hybrid ESSs9 Halama