Yapeng Zhou1, Miaohua Huant1, and Michael Pecht2,
1School of Automotive Engineering Wuhan University of Technology Wuhan, China
2Center of Advanced Life Cycle Engineering University of Maryland College Park, USA
Abstract:
A fundamental function of a battery management
system is state of health estimation. While there are numerous
methods to make this estimation, the constant current-constant
voltage charge phase can be used, and in fact, the integrated
voltage over time within the terminal voltage of 3.85 V–4.2 V
during the charge phase has a strong linear correlation with state
of health. To test this hypothesis, data from batteries which were
run through accelerated aging tests were assessed with various
methods. Estimates were made to demonstrate the effectiveness
and accuracy of the developed method.