Derating Guidelines for Lithium-Ion Batteries

Yongquan Sun, Saurabh Saxena and Michael Pecht
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Yongquan Sun: Institute of Sensor and Reliability Engineering (ISRE), Harbin University of Science and Technology, Harbin 150080, China
Saurabh Saxena: Center for Advanced Life Cycle Engineering (CALCE), University of Maryland, College Park, MD 20742, USA
Michael Pecht: Center for Advanced Life Cycle Engineering (CALCE), University of Maryland, College Park, MD 20742, USA

Energies, 2018, vol. 11, issue 12, 1-19

Abstract: Derating is widely applied to electronic components and products to ensure or extend their operational life for the targeted application. However, there are currently no derating guidelines for Li-ion batteries. This paper presents derating methodology and guidelines for Li-ion batteries using temperature, discharge C-rate, charge C-rate, charge cut-off current, charge cut-off voltage, and state of charge (SOC) stress factors to reduce the rate of capacity loss and extend battery calendar life and cycle life. Experimental battery degradation data from our testing and the literature have been reviewed to demonstrate the role of stress factors in battery degradation and derating for two widely used Li-ion batteries: graphite/LiCoO2 (LCO) and graphite/LiFePO4 (LFP). Derating factors have been computed based on the battery capacity loss to quantitatively evaluate the derating effects of the stress factors and identify the significant factors for battery derating.

Keywords: li-ion battery; derating guidelines; derating methodology; derating factor; the rate of capacity loss (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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