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Aging Studies of Ni-MH Batteries for Hybrid Electric Vehicles

The commercial introduction of advanced batteries in hybrid electric vehicles (HEVs) today requires establishing an accurate model of battery aging and life. During a battery’s lifetime, its performance slowly deteriorates because of the degradation of its electrochemical constituents. Battery manufacturers usually provide aging data that will show this degradation. However the data they provide result from standard aging tests, in which the battery is discharged and charged thousands of times with identical current profiles (or cycles). Using these data many aging models have been developed that relate the maximum number of battery cycles to the Depth of Discharge (DOD) of the current profile used. In this talk, we focus on the development of an aging model suitable for applications in which the battery is used with no pre-defined cycles, as in the case of hybridelectric vehicles. In this talk we describe experiments designed to assess the relative importance of various aging mechanisms, and their interaction.

Type of Seminar:
Public Seminar
Professor Giorgio Rizzoni
The Ohio State University, USA
May 19, 2006   14:15

ETH-Zurich, Room ML F 38
Contact Person:

Prof. Lino Guzzella
No downloadable files available.
Biographical Sketch:
Giorgio Rizzoni (Ph.D., Michigan, 1986), the Ford Motor Company Chair in Electro Mechanical Systems, is Professor of Mechanical and Electrical Engineering at The Ohio State University, and the director of the OSU Center for Automotive Research. He is a Fellow of IEEE (2004), a Fellow of SAE (2005), a recipient of the 1991 NSF Presidential Young Investigator Award, and of several other technical and teaching awards. He is a past Chair of the IFAC Technical Committee on Automotive Control, and past Chair of the ASME Dynamic Systems and Control Division and has been an Associate Editor for IEEE and ASME journals.