A Representative-Sandwich Model for Simultaneously Coupled Mechanical-Electrical-Thermal Simulation of a Lithium-Ion Cell under Quasi-Static Indentation Tests

Chao Zhang, Shriram Santhanagopalan, Michael Sprague, Ahmad Pesaran

Research output: Contribution to journalArticlepeer-review

113 Scopus Citations

Abstract

The safety behavior of lithium-ion batteries under external mechanical crush is a critical concern, especially during large-scale deployment. We previously presented a sequentially coupled mechanical-electrical-thermal modeling approach for studying mechanical-abuse-induced short circuit. In this work, we study different mechanical test conditions and examine the interaction between mechanical failure and electrical-thermal responses, by developing a simultaneously coupled mechanical-electrical-thermal model. The present work utilizes a single representative-sandwich (RS) to model the full pouch cell with explicit representations for each individual component such as the active material, current collector, separator, etc. Anisotropic constitutive material models are presented to describe the mechanical properties of active materials and separator. The model predicts accurately the force-strain response and fracture of battery structure, simulates the local failure of separator layer, and captures the onset of short circuit for lithium-ion battery cells under sphere indentation tests with three different diameters. Electrical-thermal responses to the three different indentation tests are elaborated and discussed. Numerical studies are presented to show the potential impact of test conditions on the electrical-thermal behavior of the cell after the occurrence of short circuit.

Original languageAmerican English
Pages (from-to)309-321
Number of pages13
JournalJournal of Power Sources
Volume298
DOIs
StatePublished - 1 Dec 2015

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

NREL Publication Number

  • NREL/JA-2C00-64882

Keywords

  • Indentation
  • Lithium-ion battery
  • Mechanical crush
  • Multi-physics simulation
  • Short circuit
  • Temperature ramp

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