Online monitoring and fault diagnosis and isolation of Valve Regulated Lead Acid batteries in Uninterruptible Power Supplies using decision trees

Today almost all the devices used around the world are powered by electrical energy either as a sole source or contributing in the system, moreover some applications requires a continuous electrical power source and the blackout might cause catastrophic consequences, accordingly a reliable uninterruptible power supplies is vital necessity. And online monitoring and diagnosis system is a key player to ensure the UPS (Uninterruptible Power Supply) reliability. Using lead acid batteries is very common in the UPS systems either the ordinary Lead-Acid battery or VRLA (Valve Regulated Lead Acid) batteries that are mostly used in data centers as they are almost maintenance free due to the proven reliability.