Accuracy analysis of the State-of-Charge and remaining run-time determination for lithium-ion batteries

This paper describes the various error sources in a real-time State-of-Charge (SoC) evaluation system and their effects on the overall accuracy in the calculation of the remaining run-time of a battery-operated system. The SoC algorithm for Li-ion batteries studied in this paper combines direct meas...

Full description

Saved in:
Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation Vol. 42; no. 8; pp. 1131 - 1138
Main Authors: Pop, V., Bergveld, H.J., Notten, P.H.L., Op het Veld, J.H.G., Regtien, P.P.L.
Format: Journal Article
Language:English
Published: Elsevier Ltd 01.10.2009
Subjects:
Li-ion batteries
Overpotential
State-of-Charge
Overpotential
Li-ion batteries
State-of-Charge
ISSN:0263-2241, 1873-412X
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper describes the various error sources in a real-time State-of-Charge (SoC) evaluation system and their effects on the overall accuracy in the calculation of the remaining run-time of a battery-operated system. The SoC algorithm for Li-ion batteries studied in this paper combines direct measurement of the Electro-Motive Force (EMF) and book-keeping systems. The major error source appears to be the value of the EMF, which changes with temperature, with previous (dis)charging conditions and due to aging over time. It is shown that with a new method for modelling the SoC–EMF relationship and by predicting the battery’s State-of-Charge-left, an error of less than 1 min or 1% in the remaining run-time can be obtained.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2008.03.009