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Title: Electrochemical-thermal modeling and microscale phase change for passive internal thermal management of lithium ion batteries.

Abstract

A fully coupled electrochemical and thermal model for lithium-ion batteries is developed to investigate the impact of different thermal management strategies on battery performance. In contrast to previous modeling efforts focused either exclusively on particle electrochemistry on the one hand or overall vehicle simulations on the other, the present work predicts local electrochemical reaction rates using temperature-dependent data on commercially available batteries designed for high rates (C/LiFePO{sub 4}) in a computationally efficient manner. Simulation results show that conventional external cooling systems for these batteries, which have a low composite thermal conductivity ({approx}1 W/m-K), cause either large temperature rises or internal temperature gradients. Thus, a novel, passive internal cooling system that uses heat removal through liquid-vapor phase change is developed. Although there have been prior investigations of phase change at the microscales, fluid flow at the conditions expected here is not well understood. A first-principles based cooling system performance model is developed and validated experimentally, and is integrated into the coupled electrochemical-thermal model for assessment of performance improvement relative to conventional thermal management strategies. The proposed cooling system passively removes heat almost isothermally with negligible thermal resistances between the heat source and cooling fluid. Thus, the minimization of peak temperatures andmore » gradients within batteries allow increased power and energy densities unencumbered by thermal limitations.« less

Authors:
 [1];  [1];  [1]
  1. (Georgia Institute of Technology, Atlanta, GA)
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
1038186
Report Number(s):
SAND2012-0074
TRN: US1201894
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; COOLING SYSTEMS; ELECTROCHEMISTRY; FLUID FLOW; HEAT SOURCES; LITHIUM IONS; MANAGEMENT; MINIMIZATION; PERFORMANCE; REACTION KINETICS; REMOVAL; SIMULATION; TEMPERATURE GRADIENTS; THERMAL CONDUCTIVITY

Citation Formats

Fuller, Thomas F., Bandhauer, Todd, and Garimella, Srinivas. Electrochemical-thermal modeling and microscale phase change for passive internal thermal management of lithium ion batteries.. United States: N. p., 2012. Web. doi:10.2172/1038186.
Fuller, Thomas F., Bandhauer, Todd, & Garimella, Srinivas. Electrochemical-thermal modeling and microscale phase change for passive internal thermal management of lithium ion batteries.. United States. doi:10.2172/1038186.
Fuller, Thomas F., Bandhauer, Todd, and Garimella, Srinivas. Sun . "Electrochemical-thermal modeling and microscale phase change for passive internal thermal management of lithium ion batteries.". United States. doi:10.2172/1038186. https://www.osti.gov/servlets/purl/1038186.
@article{osti_1038186,
title = {Electrochemical-thermal modeling and microscale phase change for passive internal thermal management of lithium ion batteries.},
author = {Fuller, Thomas F. and Bandhauer, Todd and Garimella, Srinivas},
abstractNote = {A fully coupled electrochemical and thermal model for lithium-ion batteries is developed to investigate the impact of different thermal management strategies on battery performance. In contrast to previous modeling efforts focused either exclusively on particle electrochemistry on the one hand or overall vehicle simulations on the other, the present work predicts local electrochemical reaction rates using temperature-dependent data on commercially available batteries designed for high rates (C/LiFePO{sub 4}) in a computationally efficient manner. Simulation results show that conventional external cooling systems for these batteries, which have a low composite thermal conductivity ({approx}1 W/m-K), cause either large temperature rises or internal temperature gradients. Thus, a novel, passive internal cooling system that uses heat removal through liquid-vapor phase change is developed. Although there have been prior investigations of phase change at the microscales, fluid flow at the conditions expected here is not well understood. A first-principles based cooling system performance model is developed and validated experimentally, and is integrated into the coupled electrochemical-thermal model for assessment of performance improvement relative to conventional thermal management strategies. The proposed cooling system passively removes heat almost isothermally with negligible thermal resistances between the heat source and cooling fluid. Thus, the minimization of peak temperatures and gradients within batteries allow increased power and energy densities unencumbered by thermal limitations.},
doi = {10.2172/1038186},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {1}
}

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