Classic GroE Gebrauchsanweisung Seite 9

Range Float charge voltage per cell
GroE, OPzS-LA,
Energy Bloc,
OGi-LA block / cell
OCSM-LA
Table 2: Float charge voltage
b) Switch mode operation
When charging, the battery is separated from the
load. Towards the end of the charging process
the charge voltage of the battery is 2.6 V - 2.75
V times the number of cells. The charging pro-
cess must be monitored (see points 2.4, 2.5 and
2.6)! On reaching a fully charged state, the
charg ing process must be stopped or switched
to float charge as in point 2.3.
c) Battery Operation
(charge-/discharge operation)
The load is supplied by the battery only, whereby
the charge voltage of the battery towards the
end of the charging process can be 2.6 V - 2.75 V
times the number of cells. The charging process
must be monitored (see points 2.4, 2.5 and 2.6)!
On reaching a fully charged state, the charging
process must be switched off. The battery can
be switched to the load as required.
2.3 Maintaining full charge
(float charging)
The devices used must comply with the stipula-
tions under DIN 41773. They are to be set so that
the average cell voltage is see table 2 and the
electrolyte density should not decrease over a
lengthy period.
2.4 Equalizing charge
Because it is possible to exceed the permitted
load voltages, appropriate measures must be
taken, e.g. switch off the load.
Equalizing charges are required after deep dis-
charges and/or inadequate charges. They can
be carried out as follows:
– at constant voltage of max. 2.4 Vpc up to 72
hours
– with I- or W-characteristic as in point 2.6.
The electrolyte temperature must never exceed
55° C. If it does, stop charging or revert to float
charge to allow the temperature to drop.
The end of the equalizing charge is reached
when the electrolyte density and the cell volt-
ages no longer increase over a period of 2 hours.
(2 h -criterion only applies to I- and W-cha rac-
teristics).
2.5 Alternating currents
When recharging up to 2.4 Vpc under operation
modes 2.2 the value of the alternating current is
occasionally permitted to reach 10 A (RMS) per
100 Ah nominal capacity.
In a fully charged state during float charge or
standby parallel operation the actual value of the
alternating current must not exceed 5 A (RMS)
per 100 Ah nominal capacity.
2.6 Charging currents
The charging currents are not limited during
standby parallel operation or buffer operation
(IU-charge characteristic) with voltages up to
2.4 Vpc (reference values 10 A up to 35 A per
100 Ah nominal capacity).
Charging by I- or W-characteristic results in volt-
ages higher than 2.4 Vpc and therefore increas-
ed decomposition of water. The charging cur-
rents per 100 Ah nominal capacity shown in the
following table must not be exceeded.
Charging
procedure
2.23 V
2.25 V
IU-
characteristic*)
I-
characteristic
W-
characteristic
Table 3: Permissible charging currents per 100 Ah
nominal capacity, *) = recommended values
2.7 Temperature
The recommended operating temperature range
for lead acid batteries is 10° C to 30° C. All tech-
ni cal data apply to the nominal temperature
20° C.
The ideal operating temperature is 20° C ± 5 K.
Higher temperatures will seriously reduce ser-
vice life. Lower temperatures reduce the avail-
able capacity. The absolute maximum tempera-
ture is 55° C.
2.8 Temperature-related charge voltage
A temperature related adjustment of the charge
voltage within the operating temperature of 10° C
to 30° C is not necessary. If the operating tem-
perature is constantly outside this range, the
charge voltage has to be adjusted.
The temperature correction factor is -0.004 Vpc
per K. Thereby 2.4 Vpc must not be exceeded
and the voltage must not come below 2.15 Vpc
(OCSM: 2.17 Vpc).
2.9 Electrolyte
The electrolyte density is diluted sulphuric acid.
The nominal electrolyte density ± 0.01 kg/l (acc.
to technical data) is based on 20 °C when fully
charged and with the maximum electrolyte level.
Higher temperatures reduce elec trolyte density,
lower temperatures in crease electrolyte density.
The appropriate correction factor is -0.0007 kg/l
per K.
Example: electrolyte density of 1.23 kg/l at 35° C
corresponds to a density of 1.24 kg/l at 20° C or
an electrolyte density of 1.25 kg/l at 5° C corre-
sponds to a density of 1.24 kg/l at 20° C.
3. Battery maintenance and control
The electrolyte level must be checked regularly.
If it drops to the lower electrolyte level mark,
purified water must be added in accordance with
DIN 43530 Part 4 (maximum conductivity
30 µS/cm). Keep the battery clean and dry to
avoid leakage currents. Plastic parts of the bat-
tery, especially containers, must be cleaned with
pure water without additives.
At least every 6 months measure and record:
• Battery voltage
• Voltage of some cells/block batteries
• Electrolyte temperature of some cells
• Battery-room temperature
• Electrolyte density of some cells
If the cell voltages deviate by more than + 0.1 V
or - 0.05 V (for blocks see table 4) from the aver-
age charge retention voltage (see table 2), and/
or if the electrolyte density of the cells of a bat-
tery string deviates from the average-value more
than - 0.01/+ 0.02 kg/l (reference values), call
customer service.
Tolerance
+
-
Table 4: Permissible deviation from the average
charge retention for block batteries
Range Cell
GroE OGi-LA,
OPzS-LA, voltage
OCSM-LA,
Energy Bloc
(OGi-LA Block)
10 A to 35 A up to
2.40 V
6.5 A 5.0 A 2.60 V-
2.75 V
9.0 A 7.0 A at 2.40 V
4.5 A 3.5 A at 2.65 V
4 V- 6 V- 10 V- 12 V-
Block Block Block Block
0.14 V 0.17 V 0.22 V 0.24 V
0.07 V 0.09 V 0.11 V 0.12 V
Annual measurement and recording:
• Voltage of all cells/block batteries
• Electrolyte temperature of all cells
• Electrolyte density of all cells
Annual visual check:
• Screw connections
• Screw connections without locking devices
have to be checked for tightness
• Battery installation and arrangement
• Ventilation
4. Tests
Tests have to be carried out according to
IEC 60896-11. Special instructions like DIN VDE
0107 and DIN EN 50172 have to be observed.
Capacity test, for instance, acceptance test
on site: In order to make sure the battery is fully
charged the following IU-charge methods must
be applied: Option 1: float charge (see table 2),
≥ 72 hours. Option 2: 2.40 Vpc, ≥ 16 hours (max.
48 hours) followed by float charge (see item 2.3),
≥ 8 hours. The current available to the battery
must be between 10 A / 100 Ah and 35 A / 100 Ah
of the C -capacity.
10
5. Faults
Call the services agents immediately if faults in
the battery or charging unit are found. Recorded
data as described in point 3. simplify the trouble-
shooting and fault clearance. A service contract
for example with Exide Technologies facilitates
detecting faults in time.
6. Storage and taking out of operation
To store or decommission cells/blocks for a
longer period of time they should be fully charged
and stored in a dry and cold but frost-free room,
away from direct sunlight. To avoid damage the
following charging methods can be chosen:
To prevent damage, choose the following charg-
ing methods:
1. Refreshing charges every three months as
described under point 2.4.
At average ambient temperatures of more
than the nominal temperature shorter inter-
vals can be necessary.
2. Float charging as under point 2.3.
7. Transport
Cells/block batteries must be transported in an
upright position. Cells/block batteries without
any visible damage are not defined as hazardous
goods under the regulations for transport of
hazardous goods by road (ADR) or by railway
(RID). They must be protected against short cir-
cuits, slipping, upsetting or damaging. Block
batteries may be suitably stacked and secured
on pallets (ADR and RID, special provision 598).
It is prohibited to stack pallets. No dangerous
traces of acid may be found on the exteriors of
the packing units. Cells/block batteries whose
cases leak or are damaged must be packed and
transported as class 8 hazardous goods under
UN no. 2794.
In case of air transport, batteries which are part
of any equipment must be disconnected at their
terminals, and the terminals must be protected
against short-circuits. This is in order to avoid
the risk of any incidents like fire etc.
8. Technical data
The nominal voltage, the number of cells, the
no minal capacity (C = C ) and the battery type
10 N
are described on the type plate. Other capacities
(C ) at different discharge currents (I
n
corresponding discharge times (t
8.1.1 - 8.1.5.
) with the
n
) see table
n
9
en