Development of an empirical aging model for Li-ion batteries and application to assess the impact of V2G strategies on battery lifetime

ln this paper an empirical capacity fade model for Li-ion batteries has been developed, calibrated and validated for a NCA/C and a LFP/C Li-ion cell. Based on extensive experimental work, it is able to describe both cycle and calendar effects on aging. The stress factors taken into account for each...

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Bibliographic Details
Published inApplied energy Vol. 172; no. June
Main Authors Petit, Martin, Prada, Eric, Sauvant-Moynot, Valérie
Format Journal Article
LanguageEnglish
Published Elsevier 2016
Subjects
Engineering Sciences
Other
Vehicle-to-grid
Aging modeling
Cycle life
Simulation
Lithium-ion
Electric vehicle
Cells
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Summary:ln this paper an empirical capacity fade model for Li-ion batteries has been developed, calibrated and validated for a NCA/C and a LFP/C Li-ion cell. Based on extensive experimental work, it is able to describe both cycle and calendar effects on aging. The stress factors taken into account for each aging mode are the state of charge and the tempe rature for calendar aging, and the temperature and the current for cycle aging. A simple approach has been adopted in order to instantaneously apply either cycle aging or calendar aging according to operating conditions and th us accurately mode! aging effects due to dynamic operating conditions. This model has then been coupled to an electrothermal mode l and integrated in a system simulation software application in order to assess the effect of charging strategies and V2G on battery lifetime. When compared, LFP/C and NCA/C exhibited different behaviors when submitted to V2G scenarios. Light V2G scenarios led to a low aging for LFP/C based battery but tended to slightly increase the aging of NCA/C based battery according to simulations.
ISSN:0306-2619
DOI:10.1016/j.apenergy.2016.03.119