Studies on electrolyte formulations to improve life of lead acid batteries working under partial state of charge conditions - (PPT)

摘要

Ageing tests of the batteries were carried out under two different PSOC procedures, characterised by lowmoderate rate (C/3) and moderate DOD (17.5%) and moderate-high rate (2C), shallow DOD (2%) and higher SOC (80%), respectively, the latter simulating battery working conditions in a vehicle equipped with Stop & Go function. In both cases results are quite satisfactory. After extensive cycling, tear-down analysis of batteries after the ageing tests showed moderate sulphation of the negative plates, located mainly on the bottom part of the plates, in the batteries tested at low-moderate rate and 17.5% DOD - 50% SOC and on the upper part after the Stop & Start cycling test, as well as positive grid corrosion in both cases.