Lucent Technologies Victory Class Batteries WP-93936
8 - 12 Maintenance
Issue 1 May 2000
Check Battery Connections, continued
Connection Voltage
Drop
The importance of the integrity of its inter-cell, inter-aisle, and
inter-row connections has been stated. Loose, dirty, or oxidized
connections have higher than normal resistance and increased voltage
drop resulting in less reserve time.
Typically, the designed voltage drop across the inter-cell connector
between cells should be 30 millivolts or less at rated current. Voltage
drop between rows for standard (inter-tier/inter-step) cables is typically
less than 100 millivolts at rated current.
Measuring
Connection
Resistance
Checking voltage drop with conventional voltmeters requires that
measurements be taken while the battery is discharging at its rated
discharge current. The resistance may be calculated using Ohm’s law.
A preferred method of measuring connection resistance uses a sensitive
digital micro-ohm meter.
Caution
Note that cycling will shorten the life of the battery. For this reason,
the use of digital, low-resistance ohmmeters is recommended. This
type of equipment allows the measurement of connection resistance
without discharging or cycling the battery.
