PERFORMANCE ANALYSIS OF VRLA BATTERIES UNDER CONTINUOUS OPERATION

Abstract

This paper contributes about the testing and performance improvement analysis of charging, discharging and lifespan characteristics of various capacities rating valve regulated lead acid (VRLA) battery banks under continuous operation. Measurement of basic parameters such as each cell voltages in battery bank, terminal voltage, load current and actual working temperature of battery banks are described in this paper. By analyzing electrical and thermal characteristics of various capacity rating battery banks, the best battery bank can be offered for particular emergency run time applications. The experimental result analysis of 48V, VRLA batteries in potential application performances at temperature sensitivity in the range of +22°C to +52°C have been determined. This study presents data on 80% depth of discharge (DOD) life test is performed on nominal capacities of 300Ah, 550Ah, 577Ah, 660Ah and 682Ah battery banks for the test duration of 32 to 43 hours. The purpose of this study is to validate the life characteristics of VRLA batteries and develop baseline information on failure rates and mechanisms. The data from this experiment on 80% DOD is performed on laboratory VRLA batteries and this model is used for real time applications. This information is important in the ongoing development of long life batteries.