Xantrex Freedom SW 815-2024, Руководство пользователя

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97-0019-01-01 63
Battery Charging Reference
Equalize Charging
Many battery manufacturers recommend periodic equalize charging to
counter cell charge imbalance and capacity-robbing electrolyte
stratification. Equalizing helps to improve battery performance and lifespan
by encouraging more of the battery material to become active.
Battery equalization is a controlled overcharging method that mixes up
stratified electrolyte and reactivates unused areas of the plate material.
Periodic equalizing can help to regularly restore batteries to a full and
healthy state of charge.
Consult the battery manufacturer's recommendation for equalize charging
settings. Sealed batteries should
never be equalized. Consult the battery
manufacturer for optimal charging procedures when using sealed batteries.
When
Equalize
mode is enabled, the battery is charged from bulk to
absorption, and then to the equalize phase. The Freedom SW will transition
from the absorption phase to equalize if:
•
the DC charge current is below 2% of the configured battery capacity
(for example, 8.8A for 440Ah).
• the absorption time is exceeded (for example, 180 min).
After absorption, the maximum charge DC current is set to 10% of battery
capacity (for example, 44A for 440Ah). See Figure 34. This constant current
charge will continue until the voltage has increased to the equalize voltage at
which point the battery will be regulated at the temperature-compensated
equalize voltage.
If the battery capacity is set to zero (Ah=0 effectively disables the exit
current criteria for the absorption charge stage making the absorption stage
defined by time only), the equalize charge current is fixed at maximum
100% of the charge rate.
Equalization duration is fixed at one hour.
Figure 34 Equalize Charging
Time
Time
Absorption Voltage
Equalize Voltage
Max Absorb Time - Dflt 3 hrs
(adjustable 1 min - 8 hrs )
Absorption Exit Current
Threshold = 2% of
programmed AH capacity
Equalize mode
Custom Charge
Equalize Stage
Absorption Stage
Bulk Stage
Bulk Voltage
Battery
Current
Battery
Voltage
10% of programmed AH
capacity
Equalize Timer
1hr fixed
Freedom SW 3K2K InvChg Owners Guide.book Page 63 Wednesday, October 9, 2013 1:34 PM