Salwa Shaik

ORCID Identifier(s)

0000-0003-3736-5145

Graduation Semester and Year

2017

Language

English

Document Type

Thesis

Degree Name

Master of Science in Mechanical Engineering

Department

Mechanical and Aerospace Engineering

First Advisor

Ankur Jain

Second Advisor

Seiichi Nomura

Abstract

Li-ion cells are ubiquitously found in day to day electronic devices due to their high power density storage capacity. These batteries are known to exhibit sharp reduction in performance at high temperature. Due to this, several attempts have been made in the past to measure thermal properties of the Li-ion cell. This work improves upon past measurements by showing that heat loss during measurements is non-negligible, and by developing an analytical model to account for such heat loss. Experimental measurements carried out on multiple materials demonstrate non-negligible heat loss. When accounted analytically, these data result in thermal conductivity values that are in close agreement with independently-measured values for Acrylic and Delrin. A D-optimality criterion is used for improving measurement accuracy. Measurements are also carried out on a Li-ion cell in order to accurately determine its radial thermal conductivity. The accurate measurement of thermal properties enabled by this work may facilitate improved thermal design of Li-ion based energy conversion and storage devices.

Keywords

Thermal conductivity, D-optimality, Anisotropy

Disciplines

Aerospace Engineering | Engineering | Mechanical Engineering

Comments

Degree granted by The University of Texas at Arlington

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