Lucent Technologies Victory Class Batteries WP-93936
8 - 4 Maintenance
Issue 1 May 2000
Check and Record Individual Cells for Crystals, continued
If Crystals Appear
on All Cells in a
String
If lead-sulfate crystals appear on all cells in a string, check the
following as possible causes for the abnormal condition:
•
Rectifier voltage: The appearance of lead-sulfate crystals may
indicate a low battery plant float voltage. Check the battery plant
float voltage and make appropriate rectifier adjustments.
•
Plant discharge: A battery discharge resulting from a power failure
or other reasons may produce lead-sulfate crystals on the cells.
This is normal with all lead-acid cells since lead sulfate is the
material produced when a lead-acid cell is discharged. If the cause
of the lead-sulfate crystals is a recent discharge, the crystals will
disappear when the cells have been fully recharged on float
(usually within two weeks). Check plant records to determine if a
discharge has occurred. Another method of determining if a plant
discharge has occurred is to measure cell specific gravities.
Readings of .03 less than the nameplate values on most cells would
be a clear indication that a plant discharge has occurred.
•
If the presence of lead-sulfate crystals on all cells in a string is not
attributable to a plant discharge or improper rectifier voltage,
report the condition to Lucent Technologies.
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