Auger, Daniel J.Groff, Maxime F.Mohan, GaneshLongo, StefanoAssadian, Francis2020-02-282020-02-282014-12-01Auger DJ, Maxime FG, Mohan G, et al., (2014) Impact of battery ageing on an electric vehicle powertrain optimisation, Journal of Sustainable Development of Energy, Water and Environment Systems, Volume 2, Issue 4, December 2014, pp. 350-3611848-9257http://dx.doi.org/10.13044/j.sdewes.2014.02.0028https://dspace.lib.cranfield.ac.uk/handle/1826/15199An electric vehicle’s battery is its most expensive component, and it cannot be charged and discharged indefinitely. This affects a consumer vehicle’s end-user value. Ageing is tolerated as an unwanted operational side-effect; manufacturers have little control over it. Recent publications have considered trade-offs between efficiency and ageing in plug-in hybrids (PHEVs) but there is no equivalent literature for pure EVs. For PHEVs, battery ageing has been modelled by translating current demands into chemical degradation. Given such models it is possible to produce similar trade-offs for EVs. We consider the effects of varying battery size and introducing a parallel supercapacitor pack. (Supercapacitors can smooth current demands, but their weight and electronics reduce economy.) We extend existing EV optimisation techniques to include battery ageing, illustrated with vehicle case studies. We comment on the applicability to similar EV problems and identify where additional research is needed to improve on our assumptions.enAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/Electric vehiclesBatteryAgeingState-of-healthPower train optimisationArticle