Journal
MEASUREMENT
Volume 42, Issue 8, Pages 1131-1138Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2008.03.009
Keywords
Li-ion batteries; State-of-Charge; Overpotential
Ask authors/readers for more resources
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 bookkeeping 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. (C) 2008 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available