Journal of Power Sources, Volume 327, 30 September 2016, Pages 394-400

Cycle life testing and modeling of graphite/LiCoO2 cells under different state of charge ranges

Saurabh Saxena1, Christopher Hendricks1, and Michael Pecht1
1 CALCE, Center for Advanced Life Cycle Engineering, Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20740, USA


Lithium-ion batteries are used for energy storage in a wide array of applications, and do not always undergo full charge and discharge cycling. This study quantifies the effect of partial charge-discharge cycling on Li-ion battery capacity loss by means of cycling tests conducted on graphite/LiCoO2 pouch cells under different state of charge (SOC) ranges and discharge currents. The results are used to develop a model of capacity fade for batteries under full or partial cycling conditions. This study demonstrates that all of the variables studied including mean SOC, change in SOC (DSOC) and discharge rate have a significant impact on capacity loss rate during the cycling operation. This study is useful in identifying the SOC ranges with slow degradation rates.

This article is available through the publisher or to CALCE Consortium Members for personal review.

[Home Page] [Articles Page]
Copyright © 2016 by CALCE and the University of Maryland, All Rights Reserved