7
5.3
STATE OF CHARGE
The open circuit voltage of the battery prior to service can be used as an approximate guide to the state of charge of
the battery. Figure 3 shows the relationship between open-circuit voltage and the state of charge of a new battery after
24 hours or more after recharge.
Note!
That state of charge is not the same as available capacity. A battery at end-of-life and fully charged will show
an OCV of 26.0V approximately but have an available capacity of 80% of rated capacity.
6.
STORAGE
The battery/re-blocking kit should be stored, fully
charged, in a cool dry place, ideally below 25°C. The
battery/re- blocking kit charge retention will be reduced
and possible performance degradation will occur if it is
subjected to long-term exposure well in excess of this
temperature.
The battery/re- blocking kit has a maximum inspection-
free storage life of two (2) years, if stored at or below
20°C, after which a boost charge should be administered
in accordance with paragraph 9. However, it is advisable
to conduct an inspection and open circuit voltage check
after 12 months and top-up charge in accordance with
paragraph 9 if necessary.
The battery/re-blocking kit may be stored up to five (5)
years without degradation of performance provided that
an inspection and open circuit voltage check is conducted
every 12 months. When stored in temperatures in excess
of 25°C the battery/re-blocking kit should be inspected
every 6 months, and top-up charged in accordance with
paragraph 9 should the open circuit voltage fall below
25.5 volts for an assembled battery or 12.75 volts for
individual monoblocs.
Should the battery be returned to storage following in
service use, it must be fully recharged in accordance
with paragraph 9 and if possible packed in original
packaging.
Figure 3 - Open circuit voltage as a function of state of charge
23.6
23.8
24.0
24.2
24.4
24.6
24.8
25.0
25.2
25.4
25.6
25.8
26.0
0
10
20
30
40
50
60
70
80
90
100
110
Open Circuit
Voltage (OCV), V
State of Charge (SOC), %
Open Circuit Voltage (OCV) as a Function of State of Charge (SOC)
for 24 Volt Aviation Batteries
Summary of Contents for HAWKER 9250-0083
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