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Investigation on the thermo-electric-electrochemical characteristics of retired LFP batteries for echelon applications by Youfu Lv; Weiming Luo; Ya Mo; Guoqing Zhang is a Materials Science article available to read on EtoBox.

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Electric vehicles (EVs) have been developed to alleviate environmental pollution and climate change, but they leave behind a large amount of retired lithium-ion batteries (LIBs). Since the replacement of LIBs from EVs will lead to considerable waste generation, improving the echelon utilization of retired LIBs is becoming increasingly critical. In this paper, we studied the thermo-electric-electrochemical performance of retired LiFePO~4~ (LFP) batteries using traditional methods, and found that the remaining capacity of retired LFP batteries has a strong correlation with their internal resistance. This result helped us to propose a rapid and elementary classification method for the calibration of the remaining capacity, and to then formulate a test protocol seeking to balance the time spent and the test cost. Besides, the cut-off voltage and charge–discharge current density have a significant impact on the calibration of the remaining capacity, especially for retired LFP batteries with low residual capacity. In the cycle life test and temperature reliability evaluation process, the results demonstrate that the retired LFP batteries have a good service life when under a lower curren

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Author

Youfu Lv; Weiming Luo; Ya Mo; Guoqing Zhang

Publisher

Royal Society of Chemistry (RSC)

Published

2022

Language

EN

Field

Materials Science (Physical Sciences)