Equalization Charge
Equalization Charge
Find out about the equalization charge for lead acid batteries
storageIndividual batteries and individual cells within lead-acid batteries react differently to be charged. Over time battery performance will drop as differences become more pronounced. At this stage it is necessary to perform an
equalization charge (or
refreshing charge) - usually once every 10 cycles, at least once per month, or when the range of voltages across the battery bank's batteries is over 0.30 volts.
nb. An equalization charge must only be performed on vented wet lead acid batteries.
An equalization charge is a current-limited charge at higher voltages than normal end of charge voltages bringing all cells within all batteries to 100% charge. A typical lead acid battery charger uses a fixed charging voltage of 13.6 volts. During equalization this charging voltage is increased to 14.4 volts or higher causing
gassing which remixes the electrolyte solution. The voltage of the battery can increase to as much as 16+ volts during equalization and so it is important to disconnect any sensitive equipment from the battery before beginning to prevent damage occuring.
Equalization is the best way to increase the longevity and efficiency of lead acid batteries.
Article Last Modified: 12:58, 21st Mar 2006
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