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Work Package 3: Extended Driving Range
The goal of this work package is to extend the driving range by securely exploiting the operating conditions of a given battery technology. This combines both a wider voltage range during driving operation, allowing a larger SoC range to be used, as well as higher charging powers during grid-charging (RWTH). Moreover, as vehicle range is not directly related to battery operating conditions, battery energy needs to be translated into vehicle range by understanding the vehicle power request. To realize this without losing the required level of safety, a profound understanding of the battery state and other conditions (e.g. internal temperature) is required. This is gained through the enhanced battery management system algorithms and models, developed in this WP. This will result in an increased energy content. On top of this, the actual vehicle range can be increased by an optimal energy use and by informing the driver of the results of her actions. Therefore TU/e will develop algorithms for range estimation and range extension by including real-time estimation of vehicle parameters, driver inputs and up-to-date route information, while VDL will focus on developing submodels for the auxiliary systems (HVAC, steering pump, pneumatic system e.g. for doors etc.) of an electric (city) bus. Moreover, VDL will support the other participants active in this work package by supplying real vehicle data of their existing e-fleet to help verifying and optimising algorithms and models. Siemens, will support Amesim vehicle and thermal system modelling activities as well as model reductions for controls, based on its results from the FP7 IMPROVE research project. An overview of the tasks and the contributions of each involved partner in this work package is given in the figure below.