0809-0012 EnerSys, 0809-0012 Datasheet - Page 12

• Manufacturer Part Number: 0809-0012
• Description: BATT CYCLON SLA 6V 5.0AH
• Manufacturer: EnerSys
• Series: Cyclon®r
• Type: Sealed Lead Acid Batteriesr

Specifications of 0809-0012

• Voltage - Rated: 6V
• Capacity: 5.0Ah
• Size / Dimension: 5.48" Dia x 2.12" H (139.2mm x 53.8mm)
• Termination Style: Spade, .250" (6.3mm)
• Rechargeability: Yes
• Weight: 2.2 lbs (997.9g)
• Output Voltage: 6 V
• Chemistry: Lead Acid
• Rechargeable/non-rechargeable: Rechargeable
• Battery Capacity: 5 Ah
• Battery Voltage: 6V
• Battery Technology: Pure Lead
• External Height: 76.7mm
• External Width: 53.8mm
• External Depth: 139.2mm
• Battery Terminals: Tab
• Height: 3.02"
• Rohs Compliant: NA
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Other names: 842-1010

12
If watt-hours rather than ampere-hours are measured, the
required overcharge factor will be higher. It is important to
note that although the battery can deliver at or near its full
capacity prior to receiving the required overcharge, in order
to obtain long cycle life, the battery must periodically receive
the required overcharge.
Charging can be accomplished by various methods. The
objective is to drive current through the cell in the direction
opposite that of discharge. Constant voltage (CV) charging
is the conventional method for charging lead-acid cells, and
is acceptable for CYCLON
current (CC), taper current and variations thereof can also be
used.
6.3 Series-parallel CYCLON
While there are no theoretical limits on the number of parallel
strings in a CYCLON battery pack, in practical situations
that limitation is imposed by (a) whether the application is
floating or cyclic in nature and (b) the charger design.
To avoid charge imbalance in a cyclic application, there
should be no more than five (5) parallel strings. Further, the
minimum inrush current that the charger should be able to
provide, assuming single step constant voltage charger is
5C for a five-string system. If a more sophisticated charge
algorithm such as the adaptive IUI charge profile is used,
the minimum inrush can be reduced to 2C for the five-string
battery pack, allowing 0.4C charge current per string.
These minimum current values are critical in a cyclic
environment as the battery is on charge for only limited
periods of time, creating a potential for significant
undercharge. Undercharging batteries in cyclic applications
leads to premature capacity loss and early end of life.
Batteries in a float application spend most of their time
on float charge. This allows all strings in a series-parallel
system to be charged adequately, eliminating the need to
restrict the number of parallel strings. However, it is still
good practice to have no more than five parallel strings,
regardless of the nature of the application.
6.4 Constant Voltage (CV) Charging
Constant voltage (CV) charging is the most efficient method
of charging CYCLON battery sealed-lead products.
Tables 6-1 and 6-2 in the next section on fast charging
show the recharge times as a function of charge voltage and
inrush current at 25°C (77°F). The minimum inrush current
for single voltage level charging is of the order of 0.4C
(C
a full charge under repetitive cycling conditions. If the CV
charger that is used has an inrush current less than C
then either the charge time allowed must be increased or
special charge algorithms must be evaluated.
Generally speaking, when the initial current is less than
C
www.enersys.com
10
10
/2.5, the charge times must be lengthened by the hourly
/2.5), and one must allow about sixteen (16) hours for
®
battery cells. However, constant
®
Battery Systems
10
10
/2.5,
rate at which the charger is limited. In other words, if the
charger is limited to the C
be added, giving a total charge time of 26 hours. Using the
same rule, if the charger is limited to the C
hours should be added and recharge would require about 21
hours instead of 16 hours.
Note that there are no practical limitations on the maximum
current imposed by the charging characteristics of the
CYCLON battery cell under constant voltage charge.
NOTE: It is important to keep in mind that for cyclic applications the
6.5 Fast Charging or Cyclic Charging
A fast charge is broadly defined as a method of charge that
will return the full capacity of a cell in less than four hours.
However, many applications require a return to a high state
of charge in one hour or less. Prior to the development
of CYCLON batteries, commercially available lead-acid
batteries required charging times of greater than four hours
to be brought up to a high state of charge.
Unlike conventional parallel flat plate lead-acid cells, the
CYCLON battery cell uses a starved electrolyte system
where the majority of the electrolyte is contained within a
highly retentive fibrous glass mat separator, creating the
starved environment necessary for homogeneous gas
phase transfer.
The gassing problem inherent in flooded electrolyte sealed-
lead batteries that utilized alloyed lead is not evident with
the CYCLON battery system, as the extremely high purity
of lead minimizes the oxygen and hydrogen gas generation
during overcharge and any oxygen gas generated is able to
recombine within the sealed cell. The high plate surface area
of the thin plates used in CYCLON battery cells reduces the
current density to a level far lower than normally seen in fast
charge of conventional lead-acid cells, thereby enhancing
the fast charge capabilities.
Tables 6-1 and 6-2 display the relationships between charge
rate and percent of previous discharge capacity returned
to the cell vs. time at 2.45 volts per cell CV charge. Prior to
the recharges, the CYCLON battery cell were discharged to
100% DOD.
charge voltage must be in the 2.45 to 2.50 volts per cell (VPC)
range. Lowering the voltage to under 2.45 VPC in such an
application will lead to a rapid loss in capacity, regardless of
the magnitude of the inrush current.
Publication No: US-CYC-AM-007 - April 2008
10
/10 rate, then 10 hours should
10
/5 rate, then 5