Samlexpower Evolution EVO-2212 Owner's Manual - page 76
76 | SAMLEX AMERICA INC.
5.8 DETAILS OF EQUALIZTION MODE CHARGING CYCLE (Fig 5.2)
•
During the Bulk Stage, the charger will charge at the programmed Bulk Charge Current
“ Io “ (see programmable range at Table 5.1. Default value is 40A). Bulk Charge Current
“Io” is normally limited to 10%-20% of the Ah capacity of the battery (20Hr Rate). Higher
current may be used if permitted by the battery manufacturer in Equalization Mode. The
Bulk Stage is displayed as "E-CC" in the Charging Mode screens of the optional
Remote Control EVO-RC (Appendix A).
•
A Software Timer is used to measure the time taken from the time the unit transfers to
the Utility / Generator Mode until the battery charger reaches 0.3V below the Absorption
Voltage, then registered this time as time To. The following times are computed based on
the time To:
•
Absorption Time T1’ = To x 0.5
•
Equalization Time T2 is then computed based on the following logic:
T2 = T1’ + 1 hr = 0.5 To + 1 hr ; if T1’ < 2 hrs
T2 = T1’ + 2 hrs = 0.5 To + 2 hrs ; if 2 < T1’ < 4 hrs
T2 = T1’ + 4 hrs = 0.5 To + 4 hrs ; if T1’ > 4 hrs
•
When the battery reaches the programmed Absorption Voltage (see programmable range
and defaults at Table 5.1), it transitions to the Absorption Stage and remains in this stage
for the computed time T1’. This stage is displayed as "E-CVA" in the Charging Mode
screens in Remote Control EVO-RC (Appendix A).
•
At the end of Absorption Stage, it transitions to the programmed Equalization Voltage (see
programmable range and defaults at Table 5.1). It remains in this stage for the computed
time T2. This stage is displayed as"E-CVE" in the Charging Mode screens in Remote
Control EVO-RC (Appendix A).
•
The equalization current “I
2
” is normally 5% to 10% of the Ah capacity of the battery.
This current is indirectly computed from the programmed Bulk Charge Current. As recom-
mended under the Setting Mode for the Bulk Charge Current, the Bulk Charge
Current “Io” is expected to be set at 10% to 20% of the Ah capacity of the battery.
Hence, the Equalization current “I
2
” will be automatically computed at 50% of the set Bulk
Charge Current “Io” which will effectively amount to 5% to 10% of the Ah capacity of
the battery. For example, the Equalization Current “I
2
” for a 200 Ah capacity battery will
be 10 A - 20A. The Bulk Charge current “Io” for a 200 Ah capacity at 10% - 20% will be
set at 20 A - 40A. The firmware will compute the Equalization Current “I
2
” at 50% of 20
A (i.e. 10A) or at 50% of 40A (i.e. 20A).
•
At the end of Equalization Stage, the charger transitions to the programmed Float Voltage
(see programmable range and defaults at Table 5.1). This stage is displayed as"Float" in
the Charging Mode screens in Remote Control EVO-RC (Appendix A).
Automatic Resetting of Charging Cycle
The charging cycle will be reset as follows:
- If the AC is reconnected or the battery voltage drops below 12 VDC / 24 VDC.
- If the charger remains in the Float Mode for 10 days.
SECTION 5 |
Battery Charging in Evolution Series