Future customer demands combined with legal requirements will drive the introduction of Hybrid Electric Vehicle (HEV) technologies. This paper classifies four levels of hybridization. In Europe, the Micro-Hybrid technology provides an attractive opportunity with respect to system cost versus CO2 emission benefits. The paper discusses the main functions of a Micro-HEV, engine stop/start and regenerative braking. Two demonstrator vehicles are presented, which have been realized at Ford Research: one compact passenger car and one commercial vehicle. Energy storage system requirements for Micro-Hybrid vehicles are outlined, namely enhanced shallow-cycle life, high dynamic charge acceptance, stable operation at partial state of charge, and improved reliability. The well-estabtished lead/acid battery technology is expected to keep playing a key rote in micro-hybrid applications. System integration of the energy storage device into the vehicle will become increasingly important, primarily enabled by Battery Monitoring Systems (BMS) that are about to become a commodity. Compared to traditional starting-lighting-ignition (SLI) batteries, significant technological progress will allow improving both performance and service life. Where a single lead/acid battery cannot fulfill the increasing demands, dual-storage systems may form a cost-efficient extension. They consist either of two lead/acid batteries or of a lead/acid battery plus another energy storage device.
Micro-HEVs as a step toward improved fuel economy and emissions
Mikrohybridelektrische Fahrzeuge als ein Schritt in Richtung verbessertem Kraftstoffverbrauch und Emissionen
2005
12 Seiten, 8 Bilder, 1 Tabelle, 18 Quellen
Conference paper
English
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