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Article

Derating Guidelines for Lithium-Ion Batteries

1
Institute of Sensor and Reliability Engineering (ISRE), Harbin University of Science and Technology, Harbin 150080, China
2
Center for Advanced Life Cycle Engineering (CALCE), University of Maryland, College Park, MD 20742, USA
*
Author to whom correspondence should be addressed.
Energies 2018, 11(12), 3295; https://doi.org/10.3390/en11123295
Received: 29 October 2018 / Revised: 13 November 2018 / Accepted: 19 November 2018 / Published: 26 November 2018
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. View Full-Text
Keywords: li-ion battery; derating guidelines; derating methodology; derating factor; the rate of capacity loss li-ion battery; derating guidelines; derating methodology; derating factor; the rate of capacity loss
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MDPI and ACS Style

Sun, Y.; Saxena, S.; Pecht, M. Derating Guidelines for Lithium-Ion Batteries. Energies 2018, 11, 3295. https://doi.org/10.3390/en11123295

AMA Style

Sun Y, Saxena S, Pecht M. Derating Guidelines for Lithium-Ion Batteries. Energies. 2018; 11(12):3295. https://doi.org/10.3390/en11123295

Chicago/Turabian Style

Sun, Yongquan, Saurabh Saxena, and Michael Pecht. 2018. "Derating Guidelines for Lithium-Ion Batteries" Energies 11, no. 12: 3295. https://doi.org/10.3390/en11123295

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