Plug-In Hybrid Electric Vehicles (PHEV) require high power density battery/energy storage for hybrid operation and high energy density battery for EV mode range. However, battery technologies to maximize power density and energy density simultaneously are not commercially feasible. The use of bi-directional DC-DC converter allows use of multiple energy storage, and the flexible DC-link voltages can enhance the system efficiency and reduce component sizing. In this paper we have conducted vehicle level study and modeling to quantify the benefit of bi-directional DC-DC converter in dual battery systems. The goal of this study is to reduce the overall cost of PHEV and demonstrate high power density and efficiency. Two cases have been investigated: (i) Conventional PHEV with single battery pack and (ii) Our novel EV/HEV with dual battery system and a DC-DC converter. The simulation results show the hybrid vehicle with two sets of HEV and EV battery packs and a DC-DC converter has better performance and higher overall efficiency over the PHEV. The dual battery system is also more cost effective and allows the best utilization of battery technologies for both high power density and high energy density.
Plug-in hybrid electric vehicle with dual battery system
2010
4 Seiten, 10 Bilder, 6 Tabellen, 5 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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