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- W2187712802 abstract "Charge balance isknowntobeanessential consideration inseries valve-regulated lead-acid (VRLA)battery applications. Conventional applications usepassive equalization tomaintain balance: periodic overcharge sequences. Active equalization usesexternal circuits toenforce charge balance without theneedforovercharge. There islittle published data toshowthepotential value ofactive equalization infloat applications suchasthose commonintelecommunications. Measured voltage balance dataforapopulation of2538batteries inasetof 846series strings arereported. Batteries showed aclear pattern ofdegraded life forcharge voltages that differ bymorethanabout ±0.1V fromanoptimum charge voltage chosen tominimize positive gridcorrosion. Passive equalization wasabletokeepabout63%ofthebatteries inthepopulation within this range. The remaining 37%showed life degradation inadirect relationship tothecharge voltage error. Itisestimated that active equalizers capable ofbalance atthelevel ofabout15mV/cell wouldhavemaintained allthebatteries nearenoughtotheoptimumrangetoavoid life degradation. An economic analysis suggests thatactive equalization wouldreduce tangible battery andassociated maintenance costs by31-36%.Therewouldbe additional economic benefits that aremoredifficult toquantify." @default.
- W2187712802 created "2016-06-24" @default.
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- W2187712802 date "2005-01-01" @default.
- W2187712802 modified "2023-09-27" @default.
- W2187712802 title "Lifetime Effects ofVoltage andVoltage Imbalance on VRLA Batteries inCable TVNetwork Power" @default.
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