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SAFT AMERICA INC.
COMPONENT MAINTENANCE MANUAL
4579
24-31-05
PAGE 109
Jan 30/98
NOTE
:
Except for batteries from long term storage, it is recommended that if a
battery requires Special Testing more than 3 times that the battery be
replaced.
NOTE
:
For a battery from long term storage, several complete
charge/discharge cycles may be required to restore performance.
(1)
Completely discharge the battery to 0 volts:
a
Discharge the battery to 1 volt using one of the rates and times listed in
Fig 103.
b
Continue to discharge the battery to 0 volts using one of the methods
found in the section entitled “Residual Discharge”.
(2)
Charge the battery at 4.5A for 10-12 hours per Figure 104.
(3)
Overcharge the battery at 4.5A for an additional 4 hours. Total charge time
will be approximately 18-20 hours.
(4)
Monitor individual cell voltages each 15-20 minutes during additional
overcharge and record OCV (Open Circuit Voltage) readings.
(5)
Note any cells that express a drop in voltage during overcharge and mark those
cells for replacement.
NOTE:
A drop in voltage during overcharge indicates a defect in the
gas barrier which is not recoverable nor repairable. Cells with
this condition must be replaced (DISASSEMBLY,
ASSEMBLY).
(6)
Replace marked cells (if required)(DISASSEMBLY, ASSEMBLY).
(7)
Return to ( * ) re-entry point in Figure 102.
I.
Electrolyte Level Adjustment
This procedure is to be carried out during overcharge at 4.5 amps during the last 15
minutes of charge cycle.
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