Electric Vehicle Battery Performance Investigation Based on Real World Current Harmonics

Sid-Ali Amamra, Yashraj Tripathy, Anup Barai, Andrew D. Moore and James Marco
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Sid-Ali Amamra: Warwick Manufacturing Group (WMG), The University of Warwick, CV4 7AL Coventry, UK
Yashraj Tripathy: Warwick Manufacturing Group (WMG), The University of Warwick, CV4 7AL Coventry, UK
Anup Barai: Warwick Manufacturing Group (WMG), The University of Warwick, CV4 7AL Coventry, UK
Andrew D. Moore: Warwick Manufacturing Group (WMG), The University of Warwick, CV4 7AL Coventry, UK
James Marco: Warwick Manufacturing Group (WMG), The University of Warwick, CV4 7AL Coventry, UK

Energies, 2020, vol. 13, issue 2, 1-13

Abstract: Electric vehicle (EV) powertrains consist of power electronic components as well as electric machines to manage the energy flow between different powertrain subsystems and to deliver the necessary torque and power requirements at the wheels. These power subsystems can generate undesired electrical harmonics on the direct current (DC) bus of the powertrain. This may lead to the on-board battery being subjected to DC current superposed with undesirable high- and low- frequency current oscillations, known as ripples. From real-world measurements, significant current harmonics perturbations within the range of 50 Hz to 4 kHz have been observed on the high voltage DC bus of the EV. In the limited literature, investigations into the impact of these harmonics on the degradation of battery systems have been conducted. In these studies, the battery systems were supplied by superposed current signals i.e., DC superposed by a single frequency alternating current (AC). None of these studies considered applying the entire spectrum of the ripple current measured in the real-world scenario, which is focused on in this research. The preliminary results indicate that there is no difference concerning capacity fade or impedance rise between the cells subjected to just DC current and those subjected additionally to a superposed AC ripple current.

Keywords: battery electric vehicle; powertrain; lithium-ion cells; battery degradation; ageing test; AC current ripple; real word data (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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