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Title: Electro-thermal cycle life model for lithium iron phosphate battery
Authors: Ye, Y.
Shi, Y.
Tay, A.A.O. 
Keywords: Capacity fading
Capacity recover
Electro-thermal model
Lithium ion battery
Issue Date: 1-Nov-2012
Citation: Ye, Y., Shi, Y., Tay, A.A.O. (2012-11-01). Electro-thermal cycle life model for lithium iron phosphate battery. Journal of Power Sources 217 : 509-518. ScholarBank@NUS Repository.
Abstract: An electro-thermal cycle life model is developed by incorporating the dominant capacity fading mechanism to account for the capacity fading effect on the lithium ion battery performance. This model is comprehensively validated in three different aspects: (1) Electrochemical performance with different discharge C-rates (C/10, 1C, 3C) and different ambient temperature (0 °C, 25 °C, 45 °C, 60 °C); (2) battery surface temperature and center temperature during 6 C-rate constant current charge-constant voltage charge-constant current discharge (CC-CV-CC); (3) the amount of capacity fade indicated by the discharge potential curves of different cycle conditions. The feasibility of using the dominant factor only to represent the overall capacity fading in model is verified, and the model is used to predict OCV-SOC curves of cycled battery. To recover the capacity fade of cycled battery, either charging the negative electrode of fully discharged battery or charging the positive electrode of fully charged battery, could be an effective method, and possible capacity recovering design is presented. The decreasing trend of thermodynamic parameter E a with increasing C-rate in the capacity fading function is deduced with increasing battery temperature when increasing discharge C-rate. © 2012 Elsevier B.V. All rights reserved.
Source Title: Journal of Power Sources
ISSN: 03787753
DOI: 10.1016/j.jpowsour.2012.06.055
Appears in Collections:Staff Publications

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