Electrochemical impedance spectroscopy state of charge measurement for batteries using power converter modulation

Abstract

This paper will demonstrate the concept of a new, low-cost, on-line technique for monitoring battery state of health (SOH) and state of charge (SOC) using electrochemical impedance spectroscopy (EIS). A particular focus will be electric vehicles (EVs), where the SOC accuracy over existing battery management systems (BMS) will improve range prediction accuracy, although the proposed technique is also applicable to other electrochemical energy storage devices. While currently there exist few methods to measure the battery state of charge online, these methods are generally categorized as “indirect” methods which are prone to errors due to environmental changes and require additional hardware/costs for implementation. In this paper the EIS excitation signal will be generated by the system's existing power converter without requiring extra hardware but only requires software upgrade. The main objective of the proposed method is to minimize the impact on the main operation of the power converter in the system

Publication DOI: https://doi.org/10.1109/IREC.2018.8362459
Divisions: Engineering & Applied Sciences
Additional Information: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Event Title: 2018 9th International Renewable Energy Congress (IREC)
Event Type: Other
Event Dates: 2018-03-20 - 2018-03-22
ISBN: 978-1-5386-0999-6, 978-1-5386-0998-9
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Related URLs: https://ieeexpl ... cument/8362459/ (Publisher URL)
PURE Output Type: Conference contribution
Published Date: 2018-05-24
Accepted Date: 2018-02-01
Authors: Gadoue, Shady
Chen, Kuan-Wen
Mitcheson, Paul
Yufit, Vladimir
Brandon, Nigel

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