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Assessment of Second Life of Lithium Iron Phosphate Based Batteries
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Abstract
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This paper reports the possibilities of second-life use of lithium iron phosphate based traction batteries. The results reveal that the investigated battery cells have still considerable high potential for recovering in stationary applications such as grid energy storage, uninterruptible power supply systems as well as renewable power management systems. In the second life, the examined battery cells have achieved 1500 cycles compared to 350 cycles in the first life. The analysis reveals that the increase of the Peukert value is limited. Moreover, the experimental results illustrate that the energy efficiency of the battery cells is >80%. According to these results, the battery cells show significantly high capacity decrease during the first stage (<200 cycles). Then the capacity maintains stable, which is analogue to the battery characteristics during the first life cycle. Moreover, from 1000 cycles the battery cells capacities decrease very fast. In this study, a relative heavy load profile has been chosen to examine the battery cells performances during the second life. The battery cells have been cycled at 2 I-t and 80% depth of discharge. Copyright (C) 2012 Praise Worthy Prize S.r.l. - All rights reserved.
Keywords:
Second Life
Lithium Iron Phosphate
Life Cycle
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