Type of Document Thesis Author Greenleaf, Michael Caldwell Author's Email Address email@example.com URN etd-11162010-114524 Title Physical Based Modeling and Simulation of LiFePO4 Secondary Batteries Degree Master of Science Department Electrical and Computer Engineering, Department of Advisory Committee
Advisor Name Title Jim Zheng Committee Chair Helen Li Committee Member Petru Andrei Committee Member Keywords
- Secondary Batteries
Date of Defense 2010-10-19 Availability unrestricted AbstractLiFePO4 batteries have been in existence since
1997 through the work of Padhi et al and showed
promise early on due to its material abundance, low cost, low environmental impact, high temperature tolerance and theoretical capacity of 170mAh/g.
Much work has been done in optimizing the cathode,
electrolyte and anode materials to yield excellent
results. In contrast, little work has been done
in developing an accurate, physical-based model for LiFePO4 behavior. Most “models” are based from
Electrochemical Impedance Spectroscopy (EIS) and
used to fit the data obtained. It is easy to build
several vastly different models to describe the same data, so it is therefore important to define a model based upon the physical properties of the cell. In doing so correctly it may then be possible to simplify that model while maintaining precision allowing it to be more useful to other fields.
In this work, different EIS measurements were taken at uniform states of charge (SOC) and from a developed physical-based model a LiFePO4 battery was accurately described for steady-state conditions.
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