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research-article

Design of a test platform for the determination of Lithium-ion Batteries state of health

[+] Author and Article Information
Jules-Adrien Capitaine

Department of Engineering, Durham University, South Road, Durham, DH1 3LE U.K
julesadrien.capitaine@gmail.com

Qing Wang

Department of Engineering, Durham University, South Road, Durham, DH1 3LE U.K
qing.wang@durham.ac.uk

1Corresponding author.

ASME doi:10.1115/1.4041855 History: Received June 28, 2018; Revised October 26, 2018

Abstract

This paper presents a novel design for a test platform to determine the State of Health (SOH) of lithium-ion batteries. The SOH is a key parameter of a battery energy storage system and its estimation remains a challenging issue. The batteries that have been tested are 18650 li-ion cells as they are the most commonly used batteries on the market. The test platform design is detailed from the building of the charging and discharging circuitry to the software. Data acquired from the testing circuitry is stored and displayed in LabView to obtain the charging and discharging curves. The resulting graphs are compared to the outcome predicted by the battery datasheets, to verify that the platform delivers coherent values. The SOH of the battery is then calculated using a Coulomb Counting method in LabView. The batteries will be discharged through various types of resistive circuits, and the differences in the resulting curves will be discussed. A single battery cell will also be tested over 30 cycles and the decrease in the SOH will be clearly identified.

Copyright (c) 2018 by ASME
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