Performance Evaluation of Battery for Domestic UPS Sector under Different Environmental Conditions /

Abstract

Battery plays an important role in the sector of energy. It functions as a storage device in renewable energy applications like solar/wind energy and in UPS (Uninterruptible Power Supply) systems. The battery is one of the costly components, it constitutes up to 60% of total cost in Solar energy Systems and up to 80% in UPS system. System’s reliability and performance depend upon the battery. To increase systems’ efficiency, battery performance needs to be optimized. Battery size is an important factor while choosing a suitable battery for an application. It should be able to provide requisite power and energy demand. Mostly, the only criterion for selecting battery size is the required load. In this research, battery performance is studied under different charge/discharge cycle and operating temperature. MATLAB model is used for simulation of battery. It has been found that the load shedding effects the total power, a battery can provide. Two cases of power outages scenarios have been defined for simulations. The results show that along with the required load, power outages should also be considered when selecting an optimum size of battery for UPS sector. Optimum size of battery has been suggested in this research for the rural and urban areas of Pakistan. For Lahore 100Ah, and for Charsadda 180Ah battery size are optimum as per results of simulation. In this research performance degradation of lc10440 cells is also investigated for UPS sector. EIS, XRD and SEM are used to evaluate the degradation of cell. The results are used in analyzing role of these cells in UPS sector.