Residual Discharge; Discharge Times - Saft 4579 Component Maintenance Manual With Illustrated Parts List

COMPONENT MAINTENANCE MANUAL
DISCHARGE RATE
D.

Residual Discharge

Discharge each cell in the battery to zero volts using one of the first two procedures
that follow.
NOTE:
(1) Continue to discharge the battery. After battery voltage drops to <1.0 V,
connect a 1.0 ohm (3.0 watt minimum) resistor across each cell's terminals.
Leave the resistor in place for 16 to 24 hours to allow each cell to completely
discharge. The resistors should be fitted with alligator clips to ensure a firm
connection.
(2) Continue to discharge the battery. After battery voltage drops to <0.5 V dc,
insert a shorting clip between its terminals. Leave these clips on for 16 hours to
allow the cells to completely discharge and the battery to cool.
(3) Remove the shorting devices and continue with testing per Fig 102.
SAFT AMERICA INC.
4579

DISCHARGE TIMES

(AMPS)
FROM STORES OR
10
20
40
45
It is not necessary to have a rest period between discharge and residual
discharge.
MINIMUM TIME FOR FIRST CELL TO
DISCHARGE TO 1 VOLT
BATTERY WITH
PRIOR SERVICE
AIRCRAFT
260.0 MINUTES
130.0 MINUTES
64.5 MINUTES
60.0 MINUTES
Discharge Times
Figure 103
NEW BATTERY
270.0 MINUTES
135.0 MINUTES
67.0 MINUTES
60.0 MINUTES
24-31-05
PAGE 105
Jan 30/98