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Battery Charging
B–4
Figure B-1 Three-stage charging profile
Equalization Charge
The equalization charge must be manually initiated because it is not
required each time the battery is recharged. Equalization is a deliberate
overcharge designed to return each cell to optimum condition by reducing
sulfation and stratification in the battery. The overcharge helps the battery
to reach and maintain peak capacity by equalizing the chemistry in the
individual battery cells.
An equalization charge should be performed only on vented, flooded
(non-sealed or “wet”) batteries. It should be performed only if
recommended by the battery manufacturer and only as often as specified.
Two-Stage Charging
Difference from
three-stage
In a two-stage charge, the charger finishes the Absorption charge but does
not go to Float mode because some battery manufacturers advise against
floating their batteries. The Truecharge+ goes into a monitoring mode
instead where the charger monitors the batteries but does not charge or
float them.
A new charge cycle will be initiated under the same conditions as for
three-step charging.
DC Current
Time
DC Voltage
Charging started
Bulk stage
Absorption stage
Float stage
Constant current
at maximum
charge rate
Constant voltage
at Absorption
voltage setting
Load current on demand
Constant voltage
at the Float
voltage setting