SAFT ELECTRIC STORAGE BATTERY Gulfstream Aerospace P/N ...

SAFT AMERICA INC.
Component Maintenance Manual
1159SCAV519-1
if the duration of the second discharge is less than 1 hr. At
C1 (less than 122 min. At 0.5C1), or if the voltage of some
cells is less than 1 V D.C. within 1 hour of discharge (122
min. At 0.5C1 ), the battery should undergo a more complete
overhaul. Perform the complementary checks [see para.
(b)].
(b) Complementary checks
The capacity supplied by the battery is :
53 A • number of minutes before 21 V D.C. / 60 = Number of
Ampere-hours (Ah), or divide by 122 if using 0.5C1
If the capacity is not greater than 53 Ah, or if the voltage of each cell
rises too quickly during charging, drops, or is excessively low at the
end of charge, some cells may have been insufficiently balanced, the
volume of added water is insufficient, or the cell separators are
damaged.
Repeat the balancing operations more accurately by discharging at
10 A.
Meanwhile, regularly measure and note the voltage of each cell,
observing the sequence of measurement. Locate and shunt the cells
whose voltage drops below 1 to 0.9 V D.C. using a 1-ohm (10 W)
resistor.
Stop discharging at the latest when the voltage reaches 10 V across
the battery terminals. Keep the shunts in place as described in
paragraph (2) (b).
Repeat the remaining operations: slow-rate charging [see para. A. (2)
(b)], checking the levels [see para. (3) (b)] and a new test discharge
[see para (a)].
Regularly check the voltage of each cell during the first and last hour
of charging.
At the end of this test, discard the following cells whose operation is
defective:
cells not reaching 1.2 V D.C. after 5 min. Charging,
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