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11.0 – Removal of Surface Charge
Surface charge is the uneven mixture of sulfuric acid and water within the
surface of the plates as a result of charging or discharging. It will make a weak
battery appear good or a good battery appears bad.
To eliminate the surface charge, use one of the following methods:
12.0 – How to Revive a Sulfated Battery?
Lead sulfation occurs when a lead sulfate compound is deposited on the lead
electrodes of a storage battery; this is a problem if the lead sulfate compound
cannot be converted back into charged material and is created when
discharged batteries stand for a long time.
When the state-of-charge (SOC) drops below 80%, the plates become coated
with a hard and dense layer of lead sulfate, which fill up the pores. The positive
plates will be light brown and the negative plates will be dull off-white. Over
time, the battery loses capacity and cannot be recharged.
12.1 Light Sulfation
Apply a constant current from one to two amps for 48 to 120 hours at 14.4 VDC,
depending on the electrolyte temperature and capacity of the battery. Cycle
(discharge to 50% and recharge) the battery a couple of times and test
capacity.
You might have to increase the voltage in order to break down the hard lead
sulfate crystals. If the battery gets above 110° F (43.3° C) then stop charging
and allow the battery to cool down before continuing.
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Allow the battery to sit for four to twelve hours to allow for the
surface charge to dissipate.
Apply a load that is 33% of the Ampere-Hour (AH) capacity for
five minutes and wait five to ten minutes.
With a battery load tester, apply a load of at least one half the
battery's CCA rating for 15 seconds and wait five to ten minutes.
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Battery Ana
User's Manual
Battery Analyzer Series
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