A9
1) Diagnosis & Recovery:
As soon charging instruction is given to the charger, the unique diagnostic function
automatically checks status of battery (detects voltage). If a deeply discharged battery’s voltage is over 4.5V±0.5V (for
12V battery) or 16V±0.25V (for 24V battery), charger begins pulse charging with 3A high current and 1.5A low current to
recover it, which terminates when voltage reaches to 10.5V±0.25V (for 12V battery) or 21V±0.25V (for 24V battery). At
this stage or if voltage of a battery is over 10.5V±0.25V (for 12V battery) or 21V±0.25V (for 24V battery) at the beginning
of the process, the charger skips pulse charging and it switches over to pre-selected charging mode.
2) Bulk :
80% of energy is returned in this phase of charging. Here charger performs in multi-stages:
For 24V battery
a) High Rate Charging: Charger delivers constant current of 3.5A until the voltage reaches to 25.6V
b) Medium Rate Charging: Charger delivers constant current of 3.0A until the voltage reaches to 28.2V at which point
the charger switches to Absorption phase.
For 12V battery
a) High Rate Charging: Charger delivers constant current of 7.0A until the voltage reaches to 12.8V
b) Medium Rate Charging: Charger delivers constant current of 5.0A until the voltage reaches to 13.9V, at this level
constant current is 3.5A until voltage reaches to 14.0V. Finally charger delivers 3.0A current until voltage reaches to
14.1V at which point the charger switches to Absorption phase. Since current is not delivered at highest constant
level,
INVATEC
SC-7 charger will minimize the heating up of the battery, and hence will eliminate the build up of
gases. This ensures more efficient and safer performance.
* In case of cold weather charging, voltage refers to 29.4V, instead of 28.8V
SC-7 Battery Charging Curve (24V/3.5A)
Voltage(V)
Diagnosis &
Recovery
Bulk
Absorption
Trickle
Charge
High Rate
Charging
Medium Rate
Charging
16V
0
21.0V
25.6V
28.2V
28.8V
28.8V
3.5A
Pulse
Current (A)
Time
3.0A
1.5A
1.5A
Below
25.6V
Maintenance
Charge
* In case of cold weather charging, voltage refers to 14.7V, instead of 14.4V
Bulk
High Rate
Charging
Medium
Rate
Charging
Low Rate Charging
4.5V
14.0V
13.9V
5.0A
3.0A
3.5A
1.5A
1.5A
1.5A
5A
12.8V
10.5V
7.0A
14.1V
14.4V
13.6V
16.5V
14.4V
Pulse
Current (A)
Voltage(V)
0
Time
200mA
Below
12.8V
Maintenance
Charge
Supply
Diagnosis &
Recovery
Absorption
Trickle
Charge
Boost
SC-7 Battery Charging Curve (12V/7A)
1
1
1
2
2
2
