Steadily rising gas prices, an increasing desire for detachment from the turmoil on international raw materials markets and the obligation to save both the local environment and the global climate: these are the main reasons for communities, public transport providers and transport associations to develop new concepts for the operation of electric buses.
These buses used to operate by means of a linear energy supply via catenaries (trolleybuses), except for very few niche applications. By now, concepts have been developed and applied in practice, which are based on on-board energy storages that can be recharged in regular intervals without catenaries.
The Fraunhofer IVI’s fast-charging electric bus is based on this concept. With a high-performance charging station, the compact Lithium-polymer battery can be recharged via a pantograph during passenger exchange in just 4.5 minutes. This so-called DockingPrinciple was born at the institute a few years ago and has since been constantly improved. The components and technologies for fully-electric operation were developed in cooperation with several partners within a research project funded by the German Ministry of Education and Research (BMBF). The concept has already been tested in regular operation on highly frequented bus lines in Dresden and Leipzig. These tests have shown that the recharging process does not affect the schedule. The fast-charging electric bus thus integrates excellently into the long tradition of public transport in Dresden.