An Empirical Study of Real-world Electric Vehicle Taxi's Energy Consumption
Tomas Levin, SINTEF, Astrid Bjørgen Sund, SINTEF
In order to access the viability of and electrified taxi fleet more knowledge was needed in regards to electric vehicle energy consumption from production vehicles. This paper presents the results from a project where data was collected from 5 Nissan Leaf's during tow periods (spring and summer) in Trondheim Norway. The results gives pointers on which type of driving. Data was collected for approximately 1500 trips.
In Norway the number of electric vehicles is exploding. Norway is at the moment the biggest buyer of electric vehicles. A lot is known about emission and energy consumption from conventional vehicles, but there is less research on electric vehicles under real-world conditions. A taxi operator decided to try 6 Nissan Leafs and to see how they could be used most efficiently, this paper looks at the how energy consumption was collected and presents results of the analysis. The Nissan Leaf is a modern vehicle in every sense and it is also connect to the internet. Nissan provided us with a firmware update that made the vehicles into probe vehicles for the project. Thus energy consumption data is collected from the internal vehicle communication bus and transferred to Nissan's back end system.
For every trip data on traction energy consumption, energy to the climate system, energy used for other purposes and regenerated energy were recorded along with GPS positions every 10 seconds. To calculate the environmental impact of moving to electrified vehicles the route data was used to simulate emissions from a conventional vehicles using emissions functions derived from the ARTEMIS project. The paper show that there is a difference between general styles of driving and differences between winter and spring driving.
Association for European Transport