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

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

B. Recycling

B. Recycling SAFT AMERICA INC. Component Maintenance Manual 1159SCAV519-1 or charge at 26.5 A until the voltage reaches 35 volts. or charge at 53 A until the voltage reaches 35 volts. (1) Equipment and product required (a) Equipment Battery charger. D.C.voltmeter, 0 to 3 V/0 to 40 V, class 0.5. Stopwatch/Timer 20 resistors (1 ohm approx.10W min. each) fitted at both ends with "alligator" clips. Plastic syringe fitted with a cylindrical adaptor and a stop. (P/N 20916-1) Valve wrench. (P/N 93365 see Fig. 902) (b) Product Distilled water. (2) Residual discharge and rebalancing (a) Residual discharge After removing the battery for scheduled maintenance or after in flight detection of a fault, discharge the unit as follows: 24-34-01 PAGE 106 AUG 30/96

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

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