Experimental Study About Effect of Temperature on Performance Parameters of Valve Regulated Lead Acid (VRLA) Battery

VRLA Batteries are crucial energy storing components in transportation and energy conservation systems. Performance of VRLA battery is affected by the battery temperature during operating condition. This paper presents experimental study about behavior of VRLA battery under different operating temperatures and also discovers the optimum operating temperature range at which battery gives better performance. Following performance parameters were evaluated at different temperature during experiment i.e. Battery capacity, Charging time, Discharging time, gassing rate of battery, Internal resistance and Self discharging rate. Different experiments performed at five different temperatures i.e. 10°C, 20°C, 30°C, 40°C and 45°C. The different experiments were design with reference of acceptance tests in IS - 15549: 2005(Indian standard for stationary valve regulated lead acid battery - specification). Experimental results shows that, capacity and discharging back up is better at higher temperature but extreme high temperature for long period results in reduced battery life. On other side shows that internal resistance increases at low temperature and high internal resistance creates a start up problem in VRLA battery. So, extreme low temperature or high temperature is not beneficial for battery.