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Impact of battery sizing on stochastic optimal power management in plug-in hybrid electric vehicles

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4 Author(s)
Scott J. Moura ; Department of Mechanical Engineering, University of Michigan, Ann Arbor, 48109-2133 USA ; Duncan S. Callaway ; Hosam K. Fathy ; Jeffrey L. Stein

This paper examines the impact of battery sizing on the performance and efficiency of power management algorithms in plug-in hybrid electric vehicles (PHEVs). Existing studies examine this impact for power management algorithms derived using either rule-based or deterministic dynamic programming methods. This paper extends the above investigations to power management algorithms optimized using stochastic dynamic programming (SDP). The paper treats both PHEV trip duration and PHEV power demand over the course of a given trip as stochastic. Furthermore, the paper examines two power management optimization objectives: one emphasizing fuel consumption only, and one that emphasizes the total cost of the blended use of fuel and electricity. The paper shows that blending provides significant benefits for small batteries, but this effect diminishes with increasing battery size.

Published in:

Vehicular Electronics and Safety, 2008. ICVES 2008. IEEE International Conference on

Date of Conference:

22-24 Sept. 2008