Analysis of On-Board Photovoltaics for a Battery Electric Bus and Their Impact on Battery Lifespan

Kevin R. Mallon, Francis Assadian and Bo Fu
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Kevin R. Mallon: Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, USA
Francis Assadian: Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, USA
Bo Fu: Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, USA

Energies, 2017, vol. 10, issue 7, 1-31

Abstract: Heavy-duty electric powertrains provide a potential solution to the high emissions and low fuel economy of trucks, buses, and other heavy-duty vehicles. However, the cost, weight, and lifespan of electric vehicle batteries limit the implementation of such vehicles. This paper proposes supplementing the battery with on-board photovoltaic modules. In this paper, a bus model is created to analyze the impact of on-board photovoltaics on electric bus range and battery lifespan. Photovoltaic systems that cover the bus roof and bus sides are considered. The bus model is simulated on a suburban bus drive cycle on a bus route in Davis, CA, USA for a representative sample of yearly weather conditions. Roof-mounted panels increased vehicle driving range by 4.7% on average annually, while roof and side modules together increased driving range by 8.9%. However, variations in weather conditions meant that this additional range was not reliably available. For constant vehicle range, rooftop photovoltaic modules extended battery cycle life by up to 10% while modules on both the roof and sides extended battery cycle life by up to 19%. Although side-mounted photovoltaics increased cycle life and range, they were less weight- and cost-effective compared to the roof-mounted panels.

Keywords: electric vehicle; photovoltaics; lithium-ion battery; battery cycle life; simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (15)

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