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research-article

Development of RVE Homogenization Model for Predicting Transversely Isotropic Elasticity of Lithium-Ion Batteries

[+] Author and Article Information
Jin Chul Yun

Pohang University of Science and Technology, Department of Mechanical Engineering 77 Cheongam-Ro. Nam-Gu. Pohang. Gyeongbuk. Korea
blwater@postech.ac.kr

Seong Jin Park

Pohang University of Science and Technology, Department of Mechanical Engineering 77 Cheongam-Ro. Nam-Gu. Pohang. Gyeongbuk. Korea
sjpark87@postech.ac.kr

1Corresponding author.

ASME doi:10.1115/1.4036709 History: Received December 06, 2016; Revised March 22, 2017

Abstract

In this study, a representative volume element (RVE) homogenization approach is proposed to predict the transversely isotropic elasticity of a lithium-ion battery (LIB) cell, module, and pack in an electric vehicle. Different RVE models for the LIB jellyroll and module are suggested. Various elastic properties obtained from RVE analyses were compared to the analytic solution. To validate the approach suggested, the elastic responses of two types of homogenized LIB module for various loading cases were compared to the model where all the jellyroll and module components were described fully. Additionally, parametric studies were conducted to determine the relationship between design parameters of the jellyroll components and the elastic behavior of LIB jellyroll and module. The results obtained in this study provide useful information for both LIB cell developers, at the concept design stage, and engineers of electric vehicles who want to predict the mechanical safety of a battery pack.

Copyright (c) 2017 by ASME
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