The proportionate contribution of rolling resistance to consumption and range has increased due to the high energy efficiency of battery electric vehicles (BEV). However, rolling resistance is often considered in a rudimentary manner to simulate the vehicle drive demand at the electric drivetrain. This study examines the influence of different levels of detail in a rolling resistance model on consumption and range simulations of BEV. Therefore, based on measurement data from a whole vehicle flat-belt dynamometer, several rolling resistance models were created. These range from a fixed rolling resistance according to ISO 28580 to transient rolling resistance models. The presented method demonstrates an approach to build a robust rolling resistance model by using statistical experiment design and a sensitivity analysis. The influence of a rolling resistance model`s level of detail on simulated consumption and range is evaluated by simulating different cycles under various tire conditions with the whole vehicle simulation of the Volkswagen AG.
Session:
Vehicle Dynamics
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| 14:00 - 14:30