Innovative Battery Concept for Plug-In-Hybrid-Vehicles

Authors

Dipl.-Ing. J. Bockstette, Prof. Dr.-Ing. S. Pischinger, RWTH Aachen University; Dipl.-Ing. D. Seibert, Dipl.-Ing. J. Ogrzewalla, FEV GmbH, Aachen

Year

2012

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 735

Summary

Batteries for plug-in-hybrid-vehicles must meet two major requirements. First of all, the battery must provide an adequate amount of power to ensure that a reasonable distance can be covered. Secondly, it must be possible to draw enough power from the battery to support combustion engine operation as well as recuperative braking, and/or to feed power back into the battery even when reaching lower SOC levels. These two requirements lead to a compromise in cell selection. High-energy cells are not able to provide the high charge and/or discharge rates necessary; high performance cells on the other hand do not have an adequate amount of energy content. Therefore, the battery can either be provided with the required energy content by switching many power cells in parallel, or it can meet the power requirements with the help of a very large energy battery with a low discharge rate. Neither solution is optimal in terms of package, weight and cost aspects.

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