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research-article

Conjugate heat transfer analysis of air/liquid cooling of a Li-ion battery pack

[+] Author and Article Information
Divya Chalise

Mechanical and Aerospace Engineering Department, University of Texas at Arlington, Arlington, TX, USA
divya.chalise@mavs.uta.edu

Krishna Shah

Mechanical and Aerospace Engineering Department, University of Texas at Arlington, Arlington, TX, USA
kshah@mavs.uta.edu

Ravi Prasher

Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
RSPrasher@lbl.gov

Ankur Jain

Mechanical and Aerospace Engineering Department, University of Texas at Arlington, Arlington, TX, USA
jaina@uta.edu

1Corresponding author.

ASME doi:10.1115/1.4038258 History: Received May 15, 2017; Revised September 27, 2017

Abstract

Thermal management of Li-ion battery packs is a critical technological challenge that directly impacts safety and performance. Removal of heat generated in individual Li-ion cells into the ambient is a considerably complicated problem involving multiple heat transfer modes. This paper develops an iterative analytical technique to model conjugate heat transfer in coolant-based thermal management of a Li-ion battery pack. Solutions for the governing energy conservation equations for thermal conduction and convection are derived and coupled with each other in an iterative fashion to determine the final temperature distribution. The analytical model is used to investigate the dependence of the temperature field on various geometrical and material parameters. The model shows that the coolant flowrate required for effective cooling can be reduced significant by improving the thermal conductivity of individual Li-ion cells. Further, the analytical model helps understand key thermal-electrochemical trade-offs in the design of thermal management for Li-ion battery packs, such as the trade-off between temperature rise and energy storage density in the battery pack.

Copyright (c) 2017 by ASME; reuse license CC-BY
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