0810-0004 EnerSys, 0810-0004 Datasheet - Page 13

• Manufacturer Part Number: 0810-0004
• Description: BATT CYCLON SLA 2V 2.5AH
• Manufacturer: EnerSys
• Series: Cyclon®r
• Type: Sealed Lead Acid Batteriesr

Specifications of 0810-0004

• Voltage - Rated: 2V
• Capacity: 2.5Ah
• Size / Dimension: 1.35" Dia x 2.41" H (34.3mm x 61.2mm)
• Termination Style: Spade, .187" (4.7mm)
• Rechargeability: Yes
• Weight: 0.39 lbs (176.90g)
• Output Voltage: 2 V
• Chemistry: Lead Acid
• Rechargeable/non-rechargeable: Rechargeable
• Battery Capacity: 25 Ah
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Other names: 842-1000

Table 6-1 (1.5C
Table 6-2 (2.5C
These tables demonstrate the superior fast charge
capabilities of the CYCLON
The numbers in Table 6-1 were generated using an initial
current in the 1.5C
generated using a current limit in the 2.5C
Increasing the magnitude of the inrush current has a
dramatic impact on the total time to recharge the cells -
only 40 minutes to return 100% of previously discharged
capacity at 2.5C
reach the same mark. This is a useful result to keep in mind
when designing battery systems for applications that require
rapid opportunistic charging.
Although CYCLON battery cells do not require a current limit
(initial current inrush) when being charged by a CV source,
most practical applications have chargers that have limited
power handling capabilities, thereby also restricting the
current limit.
Cyclic charging tests were conducted using a CV charger
that had only a 1A (C
the charge times shown in Table 6-3. The charge voltage,
however, was set at 2.45 VPC. The last column shows
the number of cycles one may expect for specific DOD
numbers.
Table 6-3
2
3
www.enersys.com
Discharged at C
Constant voltage charge at 2.45 VPC with inrush current limited to 1A (C
Charge time at 2.45VPC
17 min.
27 min.
31 min.
60 min.
Charge time at 2.45VPC
12 min.
19 min.
24 min.
40 min.
Depth of
discharge, %
Up to 30
31 to 50
51 to 100
10
2
10
10
/5 (460mA) to 1.70 VPC
10
inrush)
inrush)
10
compared with 60 minutes at 1.5C
Charge
range while those in Table 6-2 were
10
/2.5 on a 2.5Ah cell) current limit and
16
3
5
8
®
time, hr.
line of sealed-lead batteries.
Capacity Returned
Capacity Returned
Number of cycles
10
100%
100%
2500
1700
50%
80%
90%
50%
80%
90%
300
range.
10
to
10
/2.5 for a 2.5Ah cell)
6.6 Float Charging
When CYCLON battery products are in a purely float
application at an ambient temperature of 25°C (77°F),
the recommended charge voltage setting is 2.25 to 2.30
volts per cell (VPC). We also recommend that this charge
voltage be temperature compensated, as outlined in
the next section.
6.7 Temperature Compensation
High temperatures accelerate the rate of the reactions that
reduce the life of a cell. At increased temperatures, the
voltage necessary for returning full capacity to a cell in a
given time is reduced because of the increased reaction
rates within the battery.
To maximize life, a negative charging temperature coefficient
of approximately ±3mV per cell per °C variation from 25°C
(77°F) is used at temperatures significantly different from
25°C (77°F). This coefficient is negative - as the ambient
temperature increases the charge voltage must be reduced,
and vice versa. Figure 6-1 shows the variation of float
voltage with temperature.
It is important to note that even if the charge voltage
is perfectly compensated for high ambient temperature,
the float life expectancy of the cell would still be reduced.
This is due to the fact that while the charge currents are
lowered because of lower charge voltages, the high ambient
temperature continues to have a negative influence on
the life of the battery. Thus, temperature compensation of
the charge voltage only partially offsets the impact of high
ambient temperature on the float life of the cell.
Figure 6-1: Variation of Charge Voltage with Temperature
2.90
2.80
2.70
2.60
2.50
2.40
2.30
2.20
2.10
-40 -35 -30 -25 -20 -15 -10 -5
Theoretical float (ideal)
V=0.00004T
and 2.20VPC minimum
Applied battery charging voltage vs temperature
2
- 0.006T + 2.3945
2.45 VPC@ 25ºC for cyclic (fast) charge
2.27 VPC@ 25ºC for float (slow) charge
Publication No: US-CYC-AM-007 - April 2008
0
Theoretical cycling (ideal)
V=0.00004T
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
Temperature, ºC
2
- 0.006T + 2.5745
13