SDMO R33C3, User And Maintenance Manual

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8.3. Charging the battery
Highly discharged or sulphated batteries (formation of whitish lead sulphate deposit on the plates, which becomes hard) can no longer
regenerate or be charged in a generating set.
A discharged battery should be recharged immediately, or else it will suffer irreparable damage.
IMPORTANT
Battery charge
Example of charge:
- 12V 60 Ah battery = 6 A charging current;
- Charge status: 50% (acid density 1.19 and voltage when idle 12.30V);
- The battery is short 30 Ah, and this must be recharged.
- Charge factor: 1.2;
- 30 Ah x 1.2 = 36 Ah to be charged;
- Charging current: 6A, approximately 6 hours charging required; the charging
current must always be 1/10
th
of the nominal capacity of the battery.
Recharging is complete when the battery voltage and the acid density stop increasing.
The power of the charger must be suitable for the battery to be charged and the charging time available.
Note: if several batteries connected together are being recharged, the following points must be checked:
-
Are the batteries connected in series?
-
Is the voltage chosen exact? 1 battery x 12 V, 3 x 36V batteries.
-
Adjust the charge current to the lowest battery.
-
The power difference between the batteries must be as low as possible.
8.4. Cleaning the battery
Keep the batteries clean and dry. The presence of impurities and rust on the battery and
terminals may cause the current jumps, voltage drops and the battery to discharge, particularly
in humid weather.
1. Clean any signs of oxidation on the battery terminals and the cable terminals using a brass
brush.
2. Fully tighten the cable terminals and lubricate them with grease for battery terminals or
vaseline. A terminal which is not secured correctly may cause sparks and therefore lead to
an explosion.
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