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

SAFT AMERICA INC.
Component Maintenance Manual
1159SCAV519-1
Discharge 100% of C1 at a constant current, i.e. 53 A (or 50%
C1, 26.5 A), and note the time necessary to obtain a voltage of
21 V D.C. across the battery terminals. The current should
automatically or manually be regulated. When the voltage
across the terminals passes between 22 and 21 V D.C. (in other
words, if sudden voltage drops occur), measure the voltage of
each cell in order to detect and localize imbalance. If the V
between cells is practically nil (normal battery), let the battery
cool down before performing a new charging operation and
topping up of levels [see para. (3) ].
(b) Reconditioning
As soon as the voltage of one or several cell(s) drops below 1 V
D.C., or, as a limit, when the voltage across the terminals of the
battery reaches 21 V D.C., stop discharging (and note the
discharge duration). Continue the discharge. Use a 1-ohm
resistor to shunt each cell and keep the resistors in place for 16
to 24 hr.
In these conditions, each cell will discharge at a slow rate
through its individual resistor without danger or reversing the
polarities.
NOTE: The complimentary checks covered in paragraph (4) (b)
provide a means of classifying the cells after their capacity; this
in not covered at this stage.
(3) Complete charging and topping up of the electrolyte level
(a) Charging
Charge the battery as per paragraph A. (2) (b) or A. (2) (c) to
ensure complete charging to 140% of the available capacity.
This charging provides a quantity of electricity equal to 140% of
the capacity of the battery. During the final stage, a certain
quantity of water from the electrolyte is decomposed and will
have to be replaced as per the following operation.
At the end the 4hr. overcharge, the electrolyte is at its maximum
level (presence of H2 and 0 bubbles on and between the plates)
and the voltage of the battery is 33 to 33.6 V D.C. [between 15
24-34-01
PAGE 107
AUG 30/96