PG-12V35 FR Power-Sonic, PG-12V35 FR Datasheet - Page 5

• Manufacturer Part Number: PG-12V35 FR
• Description: Sealed Lead Acid Battery 12V 35 Amp Hour Long Life
• Manufacturer: Power-Sonic

Specifications of PG-12V35 FR

• Output Voltage: 12 V

Figure 3: Depth of discharge vs. number of cycles
Cyclic Use
The number of charge/discharge cycles depends on the
capacity taken from the battery - a function of discharge
rate and depth of discharge - operating temperature and
the charging method.
Figure 3 shows the relationship between depth of
discharge and number of cycles, but also the capacity
increases during the early cycles.
Standby Use
The float service life, or the life expectancy under
continuous charge, depends on the frequency and
depth of discharge, the charge voltage and the ambient
temperature.
At a float voltage of 2.25-2.30 V/cell and an ambient
temperature of 68-77°F (20-25°C), PG-Series 6V & 12V
batteries are designed to yield a service life of up to 10
years before the capacity drops to about 60%.
The graph in Figure 5 shows life characteristics in float
(standby) service for ambient temperatures ranging
from 60-130°F (15-55°C).
100
80
60
40
20
Figure 4: Life characteristics in standby use
120
100
0
80
60
40
20
0
Depth 100%
Discharge
200
400
Number of Cycles
Depth 50%
Discharge
1. Discharge Current: 0.2C
2. Charge Current: 0.1C
3. Ambient Temperature: 20°C to 25°C (68°F to 77°F)
(Final Voltage 1.7 V/cell)
Ambient Temperature 20°C (68°F)
Float Charging Voltage
600
2.25 - 2.30 V/cell
Years
800
1000
Depth 30%
Discharge
1200
If prevailing ambient temperatures are well above 68-77°F
(20-25°C) the life expectancy of this type of battery in float
service depends greatly on temperature compensated
charging. The typical temperature coefficient is -3mV/
cell/°C. The graph in Figure 5 is based on temperature
compensated charging.
Figure 5: Service life at various ambient temperatures
120
110
80
60
40
20
Effects of Temperature
Actual capacity is a function of ambient temperature
and rate of discharge. At 68°F (20°C) rated capacity
is 100%. Above this temperature capacity increases,
below it capacity decreases as temperature falls.
While raising ambient temperatures increases
capacity, it also decreases useful service life. It is
estimated that battery life is halved for each 18°F
(10°C) above normal room temperature.
0
Figure 6: Effects of temperature on capacity
-40
20
10
.8
.7
.6
.5
.4
.3
.2
8
7
6
5
4
3
2
1
-30
-20
-10
20°
Temperature (
0
Temperature (C°)
30°
PG-Series Batteries
10
20
40°
o
C)
30
End of life defined as 60%
of rated capacity
50°
40
50
60°
60
0.05 C
0.10 C
0.25 C
0.50 C
1 C