Robust battery fuel gauge algorithm development, part 0: Normalized OCV modeling approach

Document Type

Conference Proceeding

Publication Date

1-20-2014

Publication Title

3rd International Conference on Renewable Energy Research and Applications, ICRERA 2014

First Page

116

Keywords

battery fuel gauge (BFG), battery management system (BMS), Li-ion battery, open circuit voltage (OCV), state of charge (SOC)

Last Page

121

Abstract

The open circuit voltage (OCV) characterization of Li-ion batteries as it applies to battery fuel gauging (BFG) in portable applications is considered in this paper. Accurate knowledge of the nonlinear relationship between the OCV and the state of charge (SOC) is required for adaptive SOC tracking during battery usage. BFG in portable applications requires this OCV-SOC characterization to be defined with a minimum number of parameters. With the help of OCV characterization data collected from 34 battery cells each at 16 different temperatures ranging from -25°C to 50°C, we present a novel normalized OCV modeling approach that dramatically reduces the number of OCV-SOC parameters and as a result simplifies and generalizes the BFG across temperatures and aging.

DOI

10.1109/ICRERA.2014.7016541

ISBN

9781479937950

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