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 New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)

nachricht Reusable carbon nanotubes could be the water filter of the future, says RIT study
30.03.2017 | Rochester Institute of Technology

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: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Fighting drug resistant tuberculosis – InfectoGnostics meets MYCO-NET² partners in Peru

28.04.2017 | Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

 
Latest News

Wireless power can drive tiny electronic devices in the GI tract

28.04.2017 | Medical Engineering

Ice cave in Transylvania yields window into region's past

28.04.2017 | Earth Sciences

Nose2Brain – Better Therapy for Multiple Sclerosis

28.04.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>