Samlex Power SCC-30AB Manuel Du Propriétaire page 20

SECTION 4 |
STAGE 2
ABSORPTION
(1 HOUR)
NIGHT
STAGE 1
BULK
C D
A
B
Fig. 4.1A - Normal Charging Algorithm
Fig. 4.2A. Normal Charging Algorithm
NIGHT
Following three types charging algorithms are used to ensure return of 100% capacity
100% DUTY
CYCLE
and also to prevent excessive gassing:
• Lead Acid - Normal Charging (Fig 4.2A): This algorithm is used for normal day-
to-day charging. Charging is sequential: Stage 1: Bulk Stage (100% Duty Cycle
which is equivalent to Constant Current)
B1
A1
voltage charging for 1 hour
to < 10% which is equivalent to Constant Voltage).
TIME
• Lead Acid - Equalization Charging (Fig 4.2B): This is carried out automatically
Fig. 4.1C LiFePO4 Charging Algorithm
after every 28 days or manually. Stage 1: Bulk Stage (100% Duty Cycle which
is equivalent to Constant Current)
voltage charging at the equalization voltage
Duty Cycle of 0% to < 10% which is equivalent to Constant Voltage).
• Lithium Battery Charging (Fig 4.2A): This algorithm is used for normal day-
to-day charging of Lithium LiFePO4 batteries designed for lead acid drop in
replacements. Charging is sequential: Stage 1: Bulk Stage - Constant Current
output until voltage reaches Absorption voltage set point. Stage 2: Absorption
Stage - Constant voltage charging for 30 minutes. Stage 3: Float Stage -
Constant voltage charging.
Transition from one stage to the other will be controlled by the selected Voltage
Regulation Set Points as follows:
• Absorption Voltage Regulation Set Point "Va"
• Equalization Voltage Regulation Set Point "Ve"
• Float Regulation Voltage Set Point "Vf"
20 | SAMLEX AMERICA INC.
Principle of Operation & Features
STAGE 3
FLOAT
Va
Vf
DAY
TIME
EQUALIZATION
(1/2/3 HOURS)
FLOAT
Ve
C1 D1
Vf
Stage 3: Float Stage (Very low Duty Cycle of 0%
DAY
NIGHT
NIGHT
100% DUTY
CYCLE
E
F
A1 B1
TIME
Fig 4.2B. Equalization Algorithm
NIGHT
E1
F1
Stage 2: Absorption Stage - constant
Stage 2: Equalization Stage - constant
Stage 3: Float Stage (Very low
EQUALIZATION
(1/2/3 HOURS)
FLOAT
Ve
C1 D1
Vf
DAY
Fig. 4.1B - Equalization Algorithm
NIGHT
E1
F1