The Fraunhofer Institute for Transportation and Infrastructure Systems offers consulting services for the introduction of fully electric city buses – according to the principle of distinguishing the possible from the impossible and identifying future prospects.
Based on comprehensive knowledge and experience in electric storage and propulsion technologies, bus routes and route networks are analyzed with regard to the possibility of a stepwise introduction of battery buses. Concepts for linear energy supply via catenaries and inductive charging are also taken into consideration. If possible, the concept for a stepwise introduction of electric city buses is designed for a short-term or middle-term time frame. The analyses are unbiased to the result. It is also possible to conclude that a route is currently or in the near future not suitable for the introduction of electric city buses. The risks related to the introduction of a certain technology are always clearly communicated. Issues relating to energy efficiency, environmental impact and costs are also included in the services.
In a first step, the route characteristics relevant for the propulsion concept are recorded. If the initial rough analysis shows that a route or a network could be suitable for the operation of battery-powered city buses, a detailed calculation of the energy and performance balances is carried out using efficient simulation tools. For vehicle modeling in general, and the modeling of the drivetrain in particular, configurations can be made regardless of the manufacturer or manufacturer-specific, depending on the customer's requirements.
The result includes statements on the suitability of a route for battery-powered buses as well as information regarding
- the necessary size of the energy storage,
- the performance requirements and
- possible changes in the operations process.
In a third step, the requirements for the electric energy storage and the drivetrain are compared to technologies which are either already available or will become realizable in the near future.
The results provide decision support for transport operators and can be used for the definition of specifications.