The Role of Interfacial Thermal Resistance in Li-Ion Battery Thermal Management: Paper No. IPACK2019-6594

Chuanbo Yang, Lei Cao

Research output: Contribution to conferencePaper

Abstract

Temperature critically affects the performance, life and safety of lithium-ion batteries. Therefore, it is essential to understand heat generation and dissipation within individual battery cells and battery packs to plan a proper thermal management strategy. One of the key challenges is that interfacial heat transfer of a battery unit is difficult to quantify. The steady-state absolute method and the transient laser-flash-diffusivity method were employed to measure heat conductivities of battery layer stacks and individual battery layer separately. Results show flash diffusivity method gives higher thermal conductivity at both cross-plane and in-plane directions. The difference is primarily caused by interfacial thermal resistance so that it can be estimated by steady-state and transient measurements. To investigate the effects of interfacial thermal transport beyond individual cell level, a multiphysics battery model is used. The model is built upon a multi-scale multi-domain modeling framework for battery packs that accounts for the interplay across multiple physical phenomena. Benefits of a battery module using thermal management materials are quantified through numerical experiments. During a thermal runaway event, it is found interfacial thermal resistance can mitigate thermal runaway in a battery module by significantly reducing heat transfer between cells.
Original languageAmerican English
Number of pages5
DOIs
StatePublished - 2019
EventASME 2019 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems - Anaheim, California
Duration: 7 Oct 20199 Oct 2019

Conference

ConferenceASME 2019 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems
CityAnaheim, California
Period7/10/199/10/19

Bibliographical note

See NREL/CP-5400-73955 for preprint

NREL Publication Number

  • NREL/CP-5400-76114

Keywords

  • interfacial thermal resistance
  • Li-ion battery
  • multiphysics modeling
  • thermal management

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