Thermal behavior of aged lithium-ion batteries: Calorimetric observations

Jan Geder, Raghavendra Arunachala, Shishir Jairam, Andreas Jossen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

Aging-induced changes of thermal behavior in highpower cylindrical lithium-ion battery cells are quantified by adiabatic calorimetry. Cells were aged by cycling with different charge currents. Changes in impedance and entropy profile are observed as consequence of prolonged cycling. Accelerating Rate Calorimeter (ARC) is used to determine heat capacity of the cells and to measure their temperature during discharge in adiabatic mode. This facilitates accurate calculation of heat generation during discharge. Using entropy and impedance data, shares of reversible and irreversible contributions to heat generation are estimated. Results elucidate the complex relationship between cell aging conditions and resulting thermal behavior and energy efficiency. Cells at similar state of health (usually understood as remaining capacity) exhibit notably different energy efficiencies and thermal behavior during discharge. The total number of charge-discharge cycles is shown to be crucial aging parameter contributing to increased heat generation during discharge and thus reducing the energy efficiency of the cells.

Original languageEnglish
Title of host publication2015 IEEE Green Energy and Systems Conference, IGESC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages24-29
Number of pages6
ISBN (Electronic)9781467372633
DOIs
StatePublished - 16 Dec 2015
EventIEEE Green Energy and Systems Conference, IGESC 2015 - Long Beach, United States
Duration: 9 Nov 2015 → …

Publication series

Name2015 IEEE Green Energy and Systems Conference, IGESC 2015

Conference

ConferenceIEEE Green Energy and Systems Conference, IGESC 2015
Country/TerritoryUnited States
CityLong Beach
Period9/11/15 → …

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