Lucent Technologies Round Cell Batteries
Issue 3 December 1999 Installation 6 - 17
Initial Charging, continued
Overview,
continued
In order to minimize handling and risk of explosion, it is recommended
to perform the initial charge after the batteries have been installed in the
stand, with the electrical connections made for the final string
configuration, and the vent funnels in place.
If the batteries cannot be charged in the final installation, it is
recommended to at least transport the batteries to an area where the
batteries can later be moved to the final installation with the vent funnel
in place. The string should be divided into groups not to exceed 60 cells
for initial charge. The charger should be capable of providing 5 amperes
per string.
The initial charge voltage should be between 2.5 and 2.55 volts per cell
average. Charging should be continued for the number of hours
indicated in Table 6-A corresponding to the temperature of the coldest
temperature reference cell in each string.
Cell temperature is determined by selecting a temperature reference cell
as determined in “Temperature Reference Cell Selection.”
When a lead-acid storage cell discharges, visible crystals of lead sulfate
form on the positive plate. Identify the crystals on the cell before the
initial charge so that their absence is apparent after the procedure is
completed. Hold a flashlight close to the jar wall at an angle of
approximately 45 degrees. The lead-sulfate crystals appear as sparkling
diamond-like reflecting particles or as a gray coloration.
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