2.5 Alternating currents
When recharging acc. to fig.1 the actual value of
the alternating current is occasionally permitted
to reach 10 A (RMS)/ 100 Ah nominal capacity. In
a fully charged state during float charge the
actual value of the alternating current must not
exceed 5 A (RMS)/ 100 Ah nominal capacity.
2.6 Charging currents
The charging current should range between 10 A
to 35 A / 100Ah nominal capacity (guide values).
2.7 Temperature
The recommended operation temperature range
for lead acid batteries is 10° C to 30° C (best 20° C
± 5 K). Higher temperatures will seriously reduce
service life. Lower temperatures reduce the avai-
lable capacity. The absolute maximum tempera-
ture is 55° C and should not exceed 45° C in ser-
vice.
2.8 Temperature-related charge voltage
The temperature related adjustment has to be
carried out acc. to fig. 1. An adjustment of the
charge voltage must not be applied within a
temperature range 15° C to 35° C.
2.9 Electrolyte
The electrolyte is diluted sulphuric acid and fixed
in a gel.
3. Battery maintenance and control
Keep the battery clean and dry to avoid leakage
currents. Plastic parts of the battery, especially
containers, must be cleaned with pure water
without additives.
At least every 6 months measure and record:
–
Battery voltage
–
Voltage of several blocs/cells
–
Surface temperature of several blocs/cells
–
Battery-room temperature
If the bloc/cell voltages differ from the average
float charge voltage by values more than speci-
fied in the following table or if the surface tem-
perature difference between blocs/cells exceeds
5 K, the service agent should be contacted.
In addition, annual measurements and recor-
ding:
–
Voltage of all blocs/cells
–
Surface temperature of all blocs/cells
–
Battery-room temperature
Annual visual checks:
–
Screw connections
–
Screw connections without locking device
have to be checked for tightness.
–
Battery installation and arrangement
–
Ventilation
4. Tests
Tests have to be carried out according to
IEC 60896-21, DIN 43539 part 1 and 100 (draft).
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 item 2.3),
≥
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/100Ah
of the nominal capacity
5. Faults
Call the service agents immediately if faults in
the battery or the charging unit are found.
Recorded data as described in item 3. must be
made available to the service agent. It is recom-
mended that a service contract is taken out with
your agent.
6. Storage and taking out of operation
To store or decommission cells 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 sun light. To avoid damage the
following charging methods can be chosen:
Type
Upper value
Lower value
2 V cells
+0.2
-0.1
6 V blocs
+0.35
-0.17
12 V-blocs
+0.48
-0.24
1. Maximum storage time is 17 months at
≤
20° C. Equalizing charges will be required
at higher temperatures, for instance, after
8.5 months at 30° C.
2. Float charging as detailed in 2.3.
7. Transport
Cells/bloc batteries must be transported in an
upright position. Batteries without any visible
damage are not defined as dangerous goods
under the regulations for transport of dangerous
goods by road (ADR) or by railway (RID). They
must be protected against short circuits, slip-
ping, upsetting or damaging. Cells/bloc batteries
may be suitable stacked and secured on pallets
(ADR and RID, special provision 598). It is prohi-
bited to staple pallets.
No dangerous traces of acid shall be found on
the exteriors of the packing unit.
Cells/bloc batteries whose containers leak or are
damaged must be packed and transported as
class 8 dangerous goods under UN no. 2794.
Fig. 1: Charge voltage vs. temperature for solar mode. Charge modes
:
1)
With switch regulator (two-step controller): Charge on curve B (max. charge voltage)
for max. 2hrs per day, then switch over to continuous charge – Curve C
2)
Standard charge (without switching) – Curve A
3)
Boost charge (Equalizing charge with external generator): Charge on curve B for max.
5hrs per month, then switch over to curve C.
