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Practical Model-Based Methodologies to Determine the State of Charge of Li/CFx Batteries

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posted on 01.07.2016 by Eugene A. Lee
In the realm of primary cells, the Li/CFx chemistry holds immense potential due to its unmatched theoretical specific energy, longevity, and shelf time. However, little work has been done on creating a simple, practical methodology to determine the state of charge (SoC) of a partially-discharged battery in critical applications, such as remote sensing and probing, and mission control hardware. We propose an approach in which the SoC can be estimated by measuring the output voltage under various current loads and fitting the data to an original model in the general form of a logistic curve. The resulting function can then be used in conjunction with least squares analysis to efficiently estimate the SoC.

History

Advisor

Karpov, Eduard

Department

Civil and Materials Engineering

Degree Grantor

University of Illinois at Chicago

Degree Level

Masters

Committee Member

McNallan, Michael Ozevin, Didem

Submitted date

2016-05

Language

en

Issue date

01/07/2016

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