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Fast-Charge Life Cycle Test on a Lithium-Ion Battery Module

ENEA, Laboratorio Sistemi e Tecnologie per la Mobilità e l’Accumulo, Santa Maria di Galeria, 00123 Roma, Italy
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World Electr. Veh. J. 2018, 9(1), 13; https://doi.org/10.3390/wevj9010013
Received: 14 May 2018 / Revised: 4 June 2018 / Accepted: 13 June 2018 / Published: 16 June 2018
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Abstract

This study addresses the effects of fast charge on a lithium-ion battery module made by four lithium-iron-phosphate cells connected in series, submitted to a test profile which included a fast-charge step at a current rate of 3 C. This test profile simulated the real working profile requested by the batteries of an electric bus to perform a particular service of local public transportation, with the batteries recharging at the end of line. More than 3000 shallow cycles were performed. The battery module did not show a significant reduction in performance in terms of capacity and energy; however, a relevant increase in resistance was observed. Due to this change, the autonomy of the electric bus was reduced correspondingly. By fixing a minimum value for the autonomy, a life estimate of the battery module was made. Finally, on the base of this result, a cost estimate and comparison between slow and fast charge was made, under the same service conditions throughout the vehicle’s lifespan, for a real case of a minibus equipped with a battery system sized for fast charge at the end of line, and a larger battery system sized for slow charge at the end of a working day. This comparison proved that, in the case study considered, the solution using fast charge was cheaper, and fast charge can be a valid approach to solve the problem of short autonomy of electric vehicles. View Full-Text
Keywords: battery; cycle life; fast charge; life cycle cost; public transport battery; cycle life; fast charge; life cycle cost; public transport
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Vellucci, F.; Pede, G. Fast-Charge Life Cycle Test on a Lithium-Ion Battery Module. World Electr. Veh. J. 2018, 9, 13.

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World Electr. Veh. J. EISSN 2032-6653 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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