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Research Papers

Development of Representative Volume Element Homogenization Model for Predicting Transversely Isotropic Elasticity of Lithium-Ion Batteries

[+] Author and Article Information
Jin Chul Yun

Department of Mechanical Engineering,
Pohang University of Science and Technology,
77 Cheongam-Ro, Nam-Gu,
Pohang 790-784, Gyeongbuk, South Korea
e-mail: blwater@postech.ac.kr

Seong Jin Park

Department of Mechanical Engineering,
Pohang University of Science and Technology,
77 Cheongam-Ro, Nam-Gu,
Pohang 790-784, Gyeongbuk, South Korea
e-mail: sjpark87@postech.ac.kr

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received December 6, 2016; final manuscript received March 22, 2017; published online May 25, 2017. Assoc. Editor: Tetsuya Ohashi.

J. Eng. Mater. Technol 139(4), 041008 (May 25, 2017) (11 pages) Paper No: MATS-16-1356; doi: 10.1115/1.4036709 History: Received December 06, 2016; Revised March 22, 2017

In this study, a representative volume element (RVE) homogenization approach is proposed to predict the mechanical properties of a lithium-ion battery (LIB) cell, module, and pack in an electric vehicle (EV). 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 © 2017 by ASME
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References

Figures

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Fig. 1

Schematic view of jellyroll in pouch type LIB

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Fig. 2

Schematic view of the module with the pouch type LIB

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Fig. 3

Process of the homogenization analysis for LIB

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Fig. 4

RVE with solid elements for LIB cell jellyroll

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Fig. 5

RVE with solid and shell elements for LIB cell jellyroll

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Fig. 6

Three types of RVE models for LIB module

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Fig. 7

Two types of homogenized battery pack model and fully described model

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Fig. 8

Definition of boundary conditions for battery pack model analyses

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Fig. 9

Displacement contour of simplified battery pack against inertia loading

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Fig. 10

Elastic modulus of active material versus elastic constants of cell jellyroll RVE

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Fig. 11

Elastic modulus of active material versus stress concentration factor of cell jellyroll RVE

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Fig. 12

Elastic modulus of active material versus elastic constants of module RVE

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Fig. 13

Thickness of Cu current collector versus elastic constants of cell jellyroll RVE

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Fig. 14

Thickness of Al current collector versus elastic constants of cell jellyroll RVE

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Fig. 15

Thickness of Cu current collector versus stress concentration factor of cell jellyroll RVE

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Fig. 16

Thickness of Al current collector versus stress concentration factor of cell jellyroll RVE

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Fig. 17

Thickness of Cu current collector versus elastic constants of module RVE

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Fig. 18

Thickness of Al current collector versus elastic constants of module RVE

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