Online electrochemical behavior analysis on the negative plate of lead-acid batteries during the high-rate partial-state-of-charge cycle
By Yang, Huan; Chen, Shenghua; Gong, Lanqian; Zaman, Shahid; Qi, Kai; Guo, Xingpeng; Qiu, Yubing; Xia, Bao Yu
Published in Electrochimica Acta
Electrochimica Acta
2020
Abstract
Transient electrochemical behavior study on the negative plate during the high-rate partial-state-of-charge (HRPSoC) cycle is of significance yet challenging to understand the health management and failure diagnosis of lead-acid batteries. Herein, we demonstrate a non-destructive monitoring method based on the charging-discharging curves and online electrochemical impedance spectrum (EIS) of the negative plate during the HRPSoC cycle. These investigations show that the potential change in the charging period (?Vcharge) and some EIS parameters can be used to evaluate the health status of lead-acid batteries during the HRPSoC cycle. Generally, low ?Vcharge, large plate capacitance, and small plate resistance indicate a low polarization degree, a slow growth rate of PbSO4 crystals, slight H2 evolution on the negative plate, and therefore, a health battery state. These investigations introduce an online technique to evaluate the electrochemical behaviors and monitor the health state of lead-acid batteries, which may provide some valuable supports for the health management and performance improvement of lead-acid batteries.