Abt Powerline SC12-7.5 Посібник з експлуатації - Сторінка 13
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Друкувати сторінкуFigure 27. Float service life
TESTING CONDITIONS:FLOATING VOLTAGE:2.275VPC 0.005V/CELL
AMBIENT TEMPERATURE:20 C TO 22 C (68 F TO 72 F)
(AH)%
120
100
80
60
40
20
0
1
2
LIFE(YEARS)
In a normal float service, where the charging voltage
is maintained at 2.275vpc 0.005 volts per cell (see
±
Fig. 28), the gases generated inside an Powerline SC
battery are continually recombined into the negative
plates and return to the water content of the
electrolyte. Therefore, electrical capacity is
effectively not lost due to the "drying up" of the
electrolyte; the loss of capacity and eventual end of
service life is brought about by the gradual corrosion
of the electrodes. It should be noted that this
corrosive process will be accelerated by high
ambient operating temperatures and/or high
charging voltage. When designing a float service
system, always consider the following:
SERVICE LIFE WILL BE DIRECTLY AFFECTED BY THE NUMBER OF
DISCHARGE CYCLES, DEPTH OF DISCHARGE, AMBIENT
TEMPERATURE AND CHARGING VOLTAGE.
Figure 28.
Relationship between float charge
100
75
50
25
OVER CHARGE
UNDER CHARGE
2.3
2.1
2.2
FLOAT CHARGE VOLTAGE(V/CELL)
o
o
o
o
3
4
5
5.5
LENGTH OF
2.4
2.5
Design/Application
Suggestions to Ensure
Maximum Service
Powerline SC are highly efficient maintenance free
electrochemical systems designed to provide years of
trouble free electrical energy. The performance and
service life of these batteries can be maximized by
observing the following guidelines:
1. Heat kills batteries. Avoid placing batteries in
close proximity to heat sources of any kind. The
longest service life will be attained where the
battery temperature does not exceed 20 C. (also
see notes 3 & 8 hereunder). When calculating the
correct float voltage setting, whether or not
temperature compensation is required, full
consideration must be given to the temperature of
the battery and room ambient. For the purpose of
the calculation, consider the temperature of a
o
battery on float to be 1 C. above local ambient.
Also, if the battery is used in an enclosure, the
temperature gradient of the enclosure itself must
be included in the calculation. i.e. The operating
temperature of the battery is given by: Room
temperature + enclosure temperature +1 C.
2. Since a battery may generate ignitable gases, do
not install close to any equipment that can
produce electrical discharges in the form of
sparks.
3. When the battery is operated in a confined space,
adequate ventilation should be provided.
4. The battery case is manufactured from high
impact ABS plastic resin. It should not be placed in
an atmosphere of, or in contact with organic
solvents or adhesive materials.
5. Correct terminals should be used on battery
connecting wires. Soldering is not recommended
but if unavoidable please refer to us for
further guidance.
6. Avoid operating at temperatures outside the
requested range.
7. When there is a possibility of the battery being
subjected to heavy vibration or mechanical shock,
it should be fastened securely and the use of
shock absorbent material is advisable.
8. When connecting the batteries, free air space
must be provided between each battery. The
recommended minimum space between batteries
is 0.2 inches (5mm) to 0.4 inches (10mm). In all
installations due consideration must be given to
adequate ventilation for the purposes of cooling.
9. When the batteries are to be assembled in series
to provide more than 100V, proper handling and
safety procedures must be observed to prevent
accidental electric shock).
10. If 2 or more battery groups are to be used,
connected in parallel, they must be connected to
the load through lengths of wires, cables or
busbars that have the same loop line resistance as
each other. This makes sure that each parallel
11
o
o