SAFT ELECTRIC STORAGE BATTERY Gulfstream Aerospace P/N ...
SAFT ELECTRIC STORAGE BATTERY Gulfstream Aerospace P/N ...
SAFT ELECTRIC STORAGE BATTERY Gulfstream Aerospace P/N ...
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<strong>SAFT</strong> AMERICA INC.<br />
Component Maintenance Manual<br />
1159SCAV519-1<br />
NOTE: After charging a discharged battery for 5 min., and some or all of the<br />
individual cell voltages indicate greater than 1.5 V D.C. [see para. B.<br />
(3)] add 10 to 15 cm 3 of distilled water to these cells. The high<br />
voltage reading may be a result of being dry.<br />
When this can be foreseen, it is advisable to check the voltages of<br />
each cell at the beginning of the charging operation.<br />
During charge, and particularly near the end of the charging period, a<br />
production of foam may occur. This phenomenon is generally due to:<br />
the presence of greasy matter inside the cell (for instance, grease<br />
or oil which could have accidentally ingressed through the valve<br />
clearing hole),<br />
excessive reduction of the specific gravity of the free electrolyte<br />
above the plates. This can happen particularly when distilled water<br />
is added to a cell having consumed all (or even more than) its<br />
content of water reserve. In this case, it is necessary to add a<br />
large volume of distilled water, which does not immediately mix<br />
with the concentrated electrolyte remaining in the cell.<br />
To stop this phenomenon, it is generally sufficient to interrupt the<br />
charging operation and to perform a discharge allowing the electrolyte<br />
to mix. The next charging operation will further improve electrolyte<br />
dispersion and the phenomenon should then disappear.<br />
In the case where the foam is formed by the contact with greasy matter<br />
inside the cell, practically nothing can be done except preventing the<br />
foam from spreading over the covers and flowing between the cells.<br />
This can easily be performed by fitting a water-absorbent cotton pad in<br />
place of the valve.<br />
(b) Slow-rate low-current charging<br />
For a new battery or after removing a discharged battery from storage;<br />
charge the battery at 5.3 amps constant current for 10-12 hours to<br />
obtain 30 V D. C. As measured across the terminals, then continue<br />
with the same rate<br />
24-34-01<br />
PAGE 104<br />
AUG 30/96