Graduation Semester and Year
2016
Language
English
Document Type
Thesis
Degree Name
Master of Science in Electrical Engineering
Department
Industrial and Manufacturing Systems Engineering
First Advisor
David A Jr
Abstract
Electrochemical energy storage has become more power and energy dense in recent years. Many applications demanding energy storage operate in a pulsed manner. The most common chemistries considered for use in these applications include valve regulated lead acid (VRLA) and lithium-ion (LI). In the work presented here, one of each of these types of batteries has been assembled with ~60 V open circuit potentials (OCPs) and is in the process of experimentally characterizing their capacity fade and impedance growth when they are used to drive a high current pulsed load in a 5 seconds on / 5 seconds off pulsed profile. All of the batteries are being discharged and recharged at rates much higher than their 1C rating. Using standard voltage, current, and thermal diagnostics as well as periodic electrochemical impedance spectroscopy (EIS) measurements, the capacity fade and impedance growth of each chemistry is being studied to understand how the high rate pulsed profile ages the cells. Empirical and lumped element models of the impedance rise will be developed to understand what is aging internally and how it affects the usable life of the batteries compared with manufacturers rated life predictions. The experimental and modeling efforts will be summarized and conclusions will be drawn to provide the audience with a better understanding of how each of these technologies ages when used in high rate, pulsed applications.
Keywords
Lithium iron phosphate, Valve regulated lead acid, Pulsed load
Disciplines
Engineering | Operations Research, Systems Engineering and Industrial Engineering
License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.
Recommended Citation
Williams, Christopher Lee, "CAPACITY FADE OF VALVE REGULATED LEAD ACID & LITHIUM IRON PHOSPHATE BATTERIES THROUGH HIGH RATE, PULSED LOADS" (2016). Industrial, Manufacturing, and Systems Theses. 16.
https://mavmatrix.uta.edu/industrialmanusys_theses/16
Comments
Degree granted by The University of Texas at Arlington