18 | SAMLEX AMERICA INC.
SECTION 4 |
battery Charging in
G4 Series
!
ATTenTIon!
Pour une égalisation efficace, il faut que les batteries
subissent à une étape majeure plus long en fonction
de la condition déchargée de la batterie. Alors:
Veuillez assurer que les batteries sont profondément déchargées (à 80%
ou plus de sa capacité), avant de les égaliser. La tension constante (la
tension de la borne après avoir déconnecter toutes sources de charge
pour un minimum de 3 heures) quand elles sont déchargées à 80% ou
plus, serait:
- Une batterie de 12V: Environ 11,7V
- Une batterie de 24V: Environ 23,4V
N'égalisez pas des batteries qui sont partiellement ou complètement
chargées
The logic will be as follows:
• During the Bulk Stage, the charger will charge at the programmed
Bulk Charge Current "
I
o"
(See Setting Menu, SCReen 6,
page 41).
• 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 Boost (Absorption) voltage, then
registered this time as time To. The following times are computed
based on the time To:
• Boost (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 Boost (Absorption)
voltage
(See Setting Menu, SCReen 4, page 41)
, it transitions
to the Boost (Absorption) Stage and remains in this stage for the
computed time T1.
• At the end of Boost (Absorption) Stage, it transitions to the
programmed Equalization voltage
(see Setting Menu SCReen 8,
page 42).
It remains in this stage for the computed time T2.
• The equalization current "
I
2
" is normally 5% of the Ah capacity of
the battery. This current is indirectly computed from the set Bulk
Charge Current.
As recommended under the Setting Mode
for the bulk Charge Current, the bulk Charge Current "
I
o" is
expected to be set at 10% 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 "
I
o" which will effectively
amount to 5% of the Ah capacity of the battery. For example, the
Equalization Current "
I
2
" for a 200 Ah capacity battery will be 10 A.
The Bulk Charge current "
I
o" for a 200 Ah capacity at 10% will be
set at 20 A. The firmware will compute the Equalization Current "
I
2
"
at 50% of 20 A (i.e. 10 A).
• At the end of Equalization Stage, the charger transitions to the
programmed Float voltage
(See Setting Menu, SCReen 5,
page 41).
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.
Fig. 4.2. Charging Curve for 4 Stage Charging in Equalization Mode
VDC
CURRENT (%) of S
et
Bulk Char
ge C
ur
ren
t Io
100
50
0
15
14
13
12
11
10
16
TIME
To
T1
T2
I
o
I
2
= 0.5 x lo
Voltage Curve
Current Curve
Legend
BULK
BOOST
(ABSORPTION)
EQUALIZATION
FLOAT
Set value of
Equalization
Voltage
V
Boost
- 0.3V
10 Days
note: Voltages are shown for
the 12V Version. For 24V version,
please double the voltages.
