Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Electric vehicle range in 450,000 kilometer real-world test

30.03.2015

Psychologists at TU Chemnitz have explored the conditions under which electric mobility can also work under particularly challenging range demands of users

75 commuters in and around Leipzig used a BMW ActiveE electric car on a daily basis for three months each, covering about 450,000 km between May 2013 and December 2014. The Professorship of Cognitive and Engineering Psychology at Technische Universität Chemnitz was responsible for the scientific user research.

Together with their project partners – the BMW Group and the Stadtwerke Leipzig – the psychologists studied how an electric vehicle with a present day typical range of around 150 kilometers can also be used comfortably near the limits of available range. Results showed that more than 80 percent of the test drivers considered the available range sufficient for everyday use.

On average, users completed about 90 kilometers per day with the ActiveE. 38 percent of the participants drove even over 100 kilometers and some individual users drove up to 6,000 kilometers in the first six weeks. The longest driven distance of a driver in one day was 367 km.

Over the entire period, 91 percent of all journeys could be carried out with the electric vehicle. As expected, the main reason for inability to use the vehicle was a large planned total trip distance in half of the cases.

“For us, the exciting question was to see how users experience the everyday use of their electric vehicles and the charging infrastructure when having particular high range demands “, explains Prof. Dr. Josef Krems, holder of the Professorship of Cognitive and Engineering Psychology, and adds: ”Overall, electric mobility also works for users who often travel long distances. Yet, there is also potential for assistance concepts that simplify the interaction with range even further.“

Confirmed was the expectation of the researchers that, with increasing usage duration and experience, stressful situations because of the range become more seldom – after adaptation to the range, there was an average of only 1.35 such situations per month. At the same time, users came near the limits of range during usage: On average, the lowest displayed charge level of a user was six percent. Half of the participants even drove their car down to four percent charge level at least once.

The results provide an indication of how important a reliable and comprehensible range indicator is, particularly for trips that approach the limits of range. Those participants who developed a high trust in the range prediction system showed significantly less range stress during usage. At the same time, the users developed suggestions for improvements on the basis of their experience.

For instance, the references period of the range estimation should be flexibly adjustable and consider different types of drivers as well as driving styles. Furthermore, the users would benefit from a range indicator that makes more transparent which information is being incorporated in which way in the estimation.

“As a project team, we are just at the beginning of examining the large corpus of interesting data. We are very much looking forward to see the results and what insights can be gained to advance the user-centered development of sustainable electric mobility systems“, said Dr. Thomas Franke, researcher at the Professorship of Cognitive and Engineering Psychology. The Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB) funded the research project within the Bavarian-Saxon e-mobility showcase ELECTROMOBILITY CONNECTS (“ELEKTROMOBILITÄT VERBINDET”). The Professorship of Cognitive and Engineering Psychology at TU Chemnitz conducts research on various topics in the field of traffic psychology, electric mobility and usability. Those who would like to be listed as future study participants in the participant database of the professorship, please register under mytuc.org/dksz.

Contact: Dr. Thomas Franke, Professorship of Cognitive and Engineering Psychology, Phone +49 371 531-37589, Email thomas.franke@psychologie.tu-chemnitz.de

Katharina Thehos | Technische Universität Chemnitz
Further information:
http://www.tu-chemnitz.de/

More articles from Studies and Analyses:

nachricht Innovative genetic tests for children with developmental disorders and epilepsy
11.07.2018 | Christian-Albrechts-Universität zu Kiel

nachricht Oxygen loss in the coastal Baltic Sea is “unprecedentedly severe”
05.07.2018 | European Geosciences Union

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Research finds new molecular structures in boron-based nanoclusters

13.07.2018 | Materials Sciences

Algae Have Land Genes

13.07.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>