-
11 -
Chronological Sequence Charging Process Main Port Battery I (Master):
A new, complete main charging cycle will be executed:
After switch position "Stand By" or power failure.
If the battery voltage drops below the reset voltage of 12.75 V / 13.25 V due to high current load beyond the maximum
charger current for 30 seconds.
1.
Charging aid for deeply discharged (lead) batteries. From 0 V, they will be subject to gentle preliminary charging for
recovery with a small current rate up to approx. 8 V or a switched-off LiFePO4 battery will be reactivated.
2.
Main charging
with maximum charging current (
phase I
) in the mean voltage range up to close to the phase U1
for
short charging times
, LED
"Main Charging"
is lighting, and approx.75 % (lead), approx. 90 % (LiFePO4) of the capacity
will be charged. The duration of phase I depends on the battery conditions, the load by additional consumers and the
charging state. The charger is recording the course of charging. For reasons of safety, the phase I will be terminated by
the safety timer (see table 2) after 15.5 hours, at the latest (cell defects of the battery etc.).
3.
In case of high battery voltage rates, the charging current will be slightly reduced for battery protection (orientation
phase). After that, automatic switching to the following phase U1.
4.
During the
phase U1
(
full charging
, cell equalization charging, LED "
Main Charging
" is lighting), the battery voltage will
be kept constant on a high level. The green LED
"Battery Full"
is flashing
(at first, short flashing, with rising charge
increasingly longer flashing), and gentle charging of the additional high battery capacity. The charger controls the
charging time and the charging current. From these values and from the course of charging being recorded during the
phase I, the charger determines the
100 % full charge point
of the battery for automatic switching to U2. In case of
slightly discharged batteries, the duration of phase U1 will be kept short for relief of the battery and low maintenance
expenditure. In case of major discharge, the phase U1 must be extended for full charging of the battery and cell
equalization charging. During this process, any influence by consumer loads is avoided reliably. The LED
"Main
Charging"
turns off at the end of the phase U1.
5.
Phase U2 (Full trickle charge, LED "Battery Full" is lighting permanently):
The charger has now switched to the lower
voltage for trickle charge maintaining and buffering 100 % charge of the battery. Depending on the battery type, the
duration of the phase U2 is limited to 24 to 48 hours to allow gentle recharging and equalization charging of the cells
with small charging current rates.
6.
Phase U3 (storage charge,
LED
"Battery Full" is permanently on
, adapted to the battery type):
In case of long-term operation, such as for extended standstill periods or during winter break with lead batteries, the
charging voltage will be reduced to the low level U3 for minimization of battery gassing and corrosion.
7.
Regeneration of lead
acid/AGM/gel
batteries
: For battery activation (avoidance of electrolyte accumulation and
sulphation), the charger will automatically run up to the charging voltage U1 twice a week for a short time (approx. 1
hour). After that, direct return to the lower storage charge U3.
Maintenance LiFePO4, Auto-Wake Up, Maintenance Phase
: Periodical automatic activation of the cell equalization
charging (balancing) by the battery BMS in case of extended standstill periods by systematic voltage increase
every 10 days for 0.4 hour. After that, return to the lower storage charge U3.
This function is blocked during “LiFePO4 Storage”.
Note:
During the phases
U1, U2, U3
(battery full)
almost the total charger current
is available for
additional supply
of consumers without any discharge of the battery.
