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Paul Kalungi_Final_Thesis_Report.pdf (2.59 MB)

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Electrochemical-Thermal Model of a Lithium-Ion Battery

Kalungi, Paul
http://orcid.org/0009-0004-6721-4393
http://rave.ohiolink.edu/etdc/view?acc_num=wright1734453325861615

Abstract Details

2024, Master of Science in Renewable and Clean Energy Engineering (MSRCE), Wright State University, Mechanical Engineering.
Lithium-ion batteries are an integral component of energy storage systems for renewable energy applications owing to their high energy density. Extensive research has therefore been carried out, utilizing both experimental and computational methods, to aid in a deeper understanding of lithium-ion batteries. Challenges related to efficiency, safety and thermal management persist, particularly during high current draw, extreme temperature conditions and extreme dynamic current operation such as in electric vehicles. This thesis work presents an electrochemical-thermal model of a lithium-ion battery that simulates and analyzes the variation of electrical behavior, chemical behavior and thermal behavior. The electrochemical model is developed by computationally finding solutions to a set of partial differential equations that describe electrochemical and thermal processes in the anode, separator and cathode. These equations are mass conservation in electrodes (cathode and anode), charge conservation in electrodes, mass conservation in the electrolyte, charge conservation in the electrolyte, and a thermal energy balance throughout the battery. In addition, the Butler Volmer equation is used to describe the exchange of lithium ions between the solid electrodes and the electrolyte. The solutions to these equations are found using a finite volume numerical procedure implemented in MATLAB. This computational model builds on the work of Borakhadikar [1] who did not deal with the thermal issue. The results obtained by the developed program are validated against those from Smith and Wang [2] and Gu and Wang [4]. Once it is determined that the program is producing good results, a number of other results are generated for the reader to review. Profiles of the lithium-ion concentrations, profiles of the voltage, and profiles of the temperature across the battery at a given discharge level are presented. In addition, the voltage output and temperature as a function of time are given. The effect of including a temperature simulating routine in the battery model are accessed. The battery’s material properties, like conductivity and diffusion, are examined for different temperature conditions. Such results may be helpful in informing the development of improved lithium-ion batteries. This work therefore contributes toward the advancement of renewable and clean energy by providing a tool that can be used to advance the state-of-the-art in reliable, safe and efficient battery energy storage.
James Menart, Ph.D. (Advisor)
Henry D. Young, Ph.D. (Committee Member)
Hong Huang, Ph.D. (Committee Member)
82 p.
Energy; Engineering; Mechanical Engineering
Thermal; One dimensional modeling; lithium-ion batteries; Electrochemical

Recommended Citations

Citations

  • Kalungi, P. (2024). Electrochemical-Thermal Model of a Lithium-Ion Battery [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1734453325861615

    APA Style (7th edition)

  • Kalungi, Paul. Electrochemical-Thermal Model of a Lithium-Ion Battery. 2024. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1734453325861615.

    MLA Style (8th edition)

  • Kalungi, Paul. "Electrochemical-Thermal Model of a Lithium-Ion Battery." Master's thesis, Wright State University, 2024. http://rave.ohiolink.edu/etdc/view?acc_num=wright1734453325861615

    Chicago Manual of Style (17th edition)

wright1734453325861615
87
© 2024, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.