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Standby power system VRLA battery reserve life estimation scheme

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2 Author(s)
Pascoe, P.E. ; Eaton Power Quality Ltd., Christchurch, New Zealand ; Anbuky, A.H.

This paper presents a valve-regulated lead acid (VRLA) battery reserve life estimation scheme. The scheme is adaptive in both type and frequency of involvement. The scheme is based on capacity trending with the support of a number of state-of-health (SOH) indicators. These SOH indicators include accumulated thermal stress, float voltage, and indicators acquired from the start-of-discharge (coup de fouet) region. An implementation test case is given, indicating that the scheme is capable of providing an accurate estimation of reserve life long before the end of life. Furthermore, the estimation accuracy improves as the end of battery life approaches.

Published in:

Energy Conversion, IEEE Transactions on  (Volume:20 ,  Issue: 4 )