The Range Extender in Real World Operation

Authors

Dr. G. K. Fraidl, Dr. F. Beste, Dr. P. E. Kapus, Dr. M. Korman, Dipl.-Ing. B. Sifferlinger, AVL List GmbH, Graz

Year

2010

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 716

Summary

For a broad acceptance of electric vehicles, the trade-off between all electric range and battery cost respectively weight represents the most important challenge. The all electric range obtained under real world conditions frequently deviates significantly from the nominal value which is measured under idealized conditions. Under extreme conditions – slow traffic and demanding requirements for cabin heating or cooling – the electrical range might become less a question of spatial distance but even more of total operation time. – the influence of the driven distance on the electric range might be even less than the total operation time. Whereas with conventional powertrain, high flexibility of the total driving range can be obtained without sacrificing cost, with a pure battery vehicle this results in extreme high cost and weight of the energy storage. Therefore the difference between the typical daily driving range (e.g. in Germany 80 -90% is below 50 km) and the minimum total range requested by most customers for acceptance of battery vehicles (200- 250 km), becomes essential. Based on the current battery technology, the most attractive approach is a battery capacity designed for the typical daily driving distance (e.g. 50 km) and an ICE Range Extender, covering larger energy requirements (higher powerdemand or longer driving distances)...

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