Publication Date

2016

Document Type

Dissertation/Thesis

First Advisor

Majumdar, Pradip, 1954-

Degree Name

M.S. (Master of Science)

Department

Department of Mechanical Engineering

LCSH

Lithium ion batteries||Electric vehicles--Batteries

Abstract

Electric Vehicles (EV) have a promising solution to the current greenhouse gas emission problems and escalating prices of the fossil fuels. One considerable factor contributing to the drawbacks of EVs is safety of the battery. Lithium ion batteries are known for their higher energy densities and potential for higher capacities thus considered one of the most important electrochemical energy storage system. Thermal run-away is critical for EVs as they have a wide range of charge and discharge rates. So effective heat transfer and protection against high operating temperatures are crucial. This study focuses on the effect of geometrical size and unit cell capacity on the performance and heat generation in a Lithium-Iron Phosphate battery cell and storage system under fast charging and discharging conditions. Charge transport is one of the critical factors that limits the performance of a Li-Ion battery cell and contributes to the large heat generation rate. A high performance cooling system is also analyzed to control cell temperature for optimum performance and avoid thermal runaway. A simulation model based on coupling a battery model that takes into account of the charge transport and heat generation with a CFD model for conjugate heat transfer and flow dynamics was used to investigate the cell polarization and thermal behavior of the battery cell for high vehicle load cycles and fast charging conditions.

Comments

Advisors: Pradip Majumdar.||Committee members: Kyu Taek Cho; Donald Zinger.||Includes bibliographical references.||Includes illustrations.

Extent

ix, 50 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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