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Two recent workshops sponsored by the US Department of Energy are reviewed. The first focused on phenomena that limit performance of batteries, on understanding interfacial phenomena, on how to make stable interfaces, and on the role nanomaterials can play in batteries. The second provided a critical review of the current status of vehicle simulation models, battery performance models, and models that describe fundamental process occurring in batteries. The paper includes synopses of the papers presented as well as discussion of the conclusions and recommendations from the workshops.

Several characteristics of switched reluctance drive (SRD) systems, such as high torque density, high efficiency, fault tolerant operation, and simplicity of construction make them potentially attractive for electric vehicle (EV) traction applications. This paper presents the results of an evaluation of the design and performance aspects of switched reluctance (SR) drive technology, with special emphasis on EV traction. Rotor/ stator design and construction, choice of materials, electronic component selection, and production costs are some of the important design and manufacturing issues analyzed. Performance characteristics such as drive control, torque ripple and noise, fault tolerance, efficiency, torque-speed characteristics, and regeneration are discussed. Several of these design and manufacturing issues are compared with similar issues for drive systems currently used for electric vehicle applications.