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3.1.5.
Each cell is constructed of premium grade LT electrodes (plates) that are
electrically isolated by AGM separators.
3.2
DEFINITION OF BATTERY SPECIFICATIONS:
3.2.1
TBP battery ratings are defined by the following:
3.2.1.1 The One-Hour Rate
This is the rate of discharge a battery can endure for one hour with the battery
voltage at or above 1.67 volts per cell, or 20 volts for a 24 volt lead-acid battery.
Capacity, measured in Ampere Hours or Ah, is the product of the discharge rate
and time (in hours) to the specified end voltage.
3.2.1.2 The Emergency Rate
This is the rate of discharge a battery can endure for thirty minutes with the
battery voltage at or above 1.67 volts per cell, or 20 volts for a 24 volt lead-acid
battery.
The Emergency Rate is the total essential load, measured in amperes, required
to support the essential bus for thirty minutes.
3.2.1.3 I
, Peak Power Current: This is the discharge current delivered at 0.3 seconds
pp
while testing during a 15 second power discharge controlled to maintain a
constant terminal voltage of half the nominal battery voltage.
I
, Constant Voltage Current: This is the discharge current at the conclusion of
pr
a 15 second power discharge controlled to maintain a constant terminal voltage
of half the nominal battery voltage.
3.2.2
State of charge using voltage measurements should be used as a guide only.
Figure 1 indicates the relationship between Battery Open-Circuit Voltage (OCV)
and % State-of-Charge (SOC). Note: This voltage measurement is valid when
the battery has been off charge for at least two hours.
3.2.3.
All valve-regulated batteries operate best in controlled temperatures. Excessive
excursions above 100°F can shorten the life of lead-acid batteries. The optimum
operating temperature is around 80°F.
Available capacity declines as the temperature drops. This decline is primarily
related to the state of the electrolyte and easily recoverable once the battery has
warmed up sufficiently.
Q01-4000
COMPONENT MAINTENANCE MANUAL
Rev G
Page 4 of 28
Teledyne Battery Products
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