EnerSys PowerSafe SBS-100F Battery Installation Guide
- June 4, 2024
- EnerSys
Table of Contents
SBS-100F Battery
Installation Guide
PowerSafe SBS-100F Battery
EnerSys ® has optimized the very successful Thin Plate Pure Lead (TPPL) SuperSafe ® SBS battery range to create the revolutionary EON Technology ® , a concept that utilizes the highest purity materials and state-of-the-art manufacturing processes to deliver energy storage solutions that can meet the requirements of emerging applications whilst offering the end user enhanced performance in existing applications. Historically, the useful service life of reserve power Valve Regulated Lead Acid (VRLA) battery systems was measured by their float life but, as applications evolve from pure standby to cyclic applications, some traditional VRLA technologies find that these new requirements push them beyond their scope of operation. SuperSafe SBS EON Technology monoblocs and cells retain the long float characteristics of standard SuperSafe SBS, with the added benefit of improved cyclic ability in both float voltage and fast charge applications.
Applications
| Application | Battery Demands | Suitability |
|---|---|---|
| Reliable Grid | Stable grid Controlled ambient temperature Compensated float | |
| voltage Very little cyclic use | Yes | |
| Grid Assist | Regions where grid is supported with scheduled outages |
Reasonable temperature control Compensated float voltage Medium level cyclic
use| Yes
Unreliable Grid (Low risk of PSoC)| Poor grid stability Frequent power outages
/ scheduled & unscheduled Poor temperature control High cyclic use Cycles can
be shallow/deep Low risk for uncontrolled Partial State of Charge| Yes
Unreliable Grid (High Risk of PSoC)| Poor grid stability Frequent power
outages / scheduled & unscheduled Poor temperature control High cyclic use
Cycles can be shallow/deep High risk or uncontrolled Partial State of Charge|
Yes
Off Grid Controlled Full State of Charge| Regular cyclic duty Battery is
return turned to a full state of charge between cycles Battery can be exposed
to fluctuating ambient temperature Balances pex and battery life| Yes
Off Grid Controlled Partial State of charge| Regular cyclic duty Battery is
deliberately operated in Partial State of Charge condition Battery is
periodically returned to Full State of Charge Battery can expose to
fluctuating ambient temperatures Designed to maximize Opex savings| Yes
Table 2 provides a summary of the operating parameters (charging) that will deliver optimum service life and performance relative to the type of application.
Application| SuperSafe ® SBS EON Technology ® Charge
Parameter for Optimised Life and Performance
---|---
Reliable Grid| ✔ Temperature compensated float voltage equivalent to 2.29Vpc @
20°C
✔ Charge current – minimum 0.1C10A, maximum unlimited
Grid Assist| ✔ Boost voltage equivalent to 2.35Vpc to 2.40Vpc @ 20°C to fast
charge
✔ Charge current – minimum 0.1C10A, maximum unlimited
✔ Followed by float voltage with temperature compensation applied as required
Unreliable Grid| ✔ Boost voltage equivalent to 2.35Vpc to 2.40Vpc @ 20°C to
fast charge
✔ Charge current – minimum 0.1C10A, maximum unlimited
✔ Followed by float voltage with temperature compensation applied as required
Hybrid Operation to Full State of Charge| ✔ Boost voltage equivalent to
2.35Vpc to 2.40Vpc @ 20°C
✔ Charge current – minimum 0.1C10A, maximum nlimited
✔ Return to full state of charge between discharge cycles
✔ Optimum charge factor 103% of discharged h
Hybrid Operation in Partial State of Charge (controlled PSoC) – Example| ✔
Boost voltage equivalent to 2.35Vpc to 2.40Vpc @ 20°C to return to 95% state
of charge
✔ Charge current – minimum 0.1C10A
✔ Full recharge every 10 days
✔ EnerSys will consider variations in controlled PSoC operation as necessary –
please contact your local representative to discuss details
Operating Temperature Range
The recommended operating temperature range for optimum life and performance
is 20°C. However, SuperSafe SBS EON Technology monoblocs and cells can be
operated in the temperature range -of 40°C to +50°C. In order to maintain the
mechanical integrity of the plastic components, the battery temperature in
operation should not exceed +50°C.
Storage
Monoblocs and cells lose capacity when standing on open-circuit because of parasitic chemical reactions. The self-discharge rate of SuperSafe SBS EON Technology monoblocs and cells is very low because of the high purity of the grid lead and electrolyte. Monoblocs and cells should be stored in a cool, dry area. High temperature increases the rate of self-discharge and reduces storage life. Figure 1 shows the relationship between open-circuit voltage (OCV) and storage time at various temperatures.
The maximum storage times before a freshening charge is required and recommended open circuit voltage audit intervals are:
Temperature (°C / °F)| Storage Time (Months)| OCV Audit
Interval (Months)
---|---|---
+10 / +50| 48| 6
+15 / +59| 34| 6
+20 / +68| 24| 4
+25 / +77| 17| 4
+30 / +86| 12| 3
+35 / +95| 8.5| 2
+40 / +104| 6| 2
Monoblocs and cells must be given a freshening charge when the OCV approaches
the equivalent of 2.10Vpc or when the maximum storage time is reached,
whichever occurs first.
Freshening Charge
Charge the monoblocs or cells at a constant voltage equivalent to 2.29 to
2.4Vpc with 0.1C10 Amps current for a period of 24 hours.
Commissioning Charge
Before conducting a capacity discharge or commencing cycling, the battery must
be given a commissioning charge. In float applications, the commissioning
charge shall consist f 7 continuous days of float charge at the recommended
float voltage (2.29Vpc at 20°C) with no load connected to the battery. In
hybrid applications, the commissioning charge hall consists of 24 hours charge
at a voltage equivalent to 2.40Vpc with no load connected.
Float Operation
EON Technology ® is designed for continuous float operation on constant
voltage chargers. Constant voltage charging is the safest, most efficient and
recommended method of charging VRLA batteries. The recommended float voltage
setting is 2.29Vpc at +20°C/+77°F. Therefore the system voltage setting equals
the number of cells in series x 2.29Vpc. Battery life and charging
characteristics are affected by temperature. Optimum battery life will be
achieved when the battery is operating between +20°C/+68°F and +25°C/+77°F.
Figure 2 illustrates the design life at 20°C from Accelerated Float Life
testing at 55°C.
Battery life is reduced by 50% for every 10°C/18°F increase in temperature (see figure 3). Float voltage compensation reduces the charging current as battery temperature increases and partially negates the adverse effect of high temperature. +10°C
The recommended float voltage temperature compensation is:
- 2.29Vpc +4mV per cell per °C below 20°C
- 2.29Vpc -4mV per cell per °C above 20°C (refer to figure 4 for further details)
Temperature compensation is capped at +40°C/+104°F as at this temperature the compensated charge voltage approaches the natural open circuit voltage of the battery and there is insufficient overvoltage to keep the battery in a fully charged condition.
Float Charging Current Limit
Due to the very low internal resistance, SuperSafe ® SBS EON Technology
monoblocs and cells will accept unlimited current during recharge but for cost
and practical purposes in float applications where recharge time to repeat
duty is not critical, the rectifier current can be limited to the load plus
0.1C10 Amps. Fast Charging Operation In addition to the long life
characteristics inherent in traditional SuperSafe ® SBS TPPL battery designs,
EON Technology ® monoblocs, and cells have been developed to provide high
performance in applications where the battery is subjected to repeated cyclic
duty, in challenging operating conditions (high temperatures, unreliable
grids, remote locations, etc).
Fast charge techniques are best utilized for frequent discharge cyclic
applications. The high charge acceptance of EON Technology is suited for
applications that require a faster recharge with reduced time to repeat duty.
In such applications, the rectifier voltage should be set at 2.35Vpc to
2.40Vpc at 20°C. Figure 5 illustrates the time to full state of charge from
varying depths of discharge (C10 ) as a function of charge voltage.
As with float charge, temperature compensation for voltage is applicable to fast charge techniques. The profile below (figure 6) gives the recommended compensation to charge voltage for temperature, based on fast charge of 2.40Vpc at 20°C.
In systems where control of charge factor is not possible, it may be possible
to estimate time to full state of charge by using the calculation: Recharge
time (hrs) = 2* ((0.8 x discharged Ah) / current limit) +1
Fast Charging Current Limit
In addition to the influence of charge voltage, the available charge current
will impact on time to repeat duty. The low internal resistance of SuperSafe ®
SBS EON Technology ® monoblocs and cells lends itself to absorption of
unlimited in rush currents but can also be recharged with current limits equal
to the standing load plus 0.1C10 Amps. Figure 7 illustrates the typical time
to full state of charge (2.40Vpc) as a function of available charge current
from varying depths of discharge.
Cycling
Grid Assist /Unreliable Grid
EON Technology has been developed to retain the long float life
characteristics associated with standard SuperSafe SBS Technology and has the
added capability to deliver high performance in harsh applications where
cyclic duty predominates. SBS EON Technology delivers superior performance in
grid assist and unreliable grid applications where power outages can be
frequent and unscheduled leading to risk of uncontrolled partial state of
charge cycling. Figure 8 indicates the cyclic capability in a typical
unreliable grid application but is dependent on actual site conditions.
Hybrid Operation
The high charge acceptance of SuperSafe SBS EON Technology monoblocs and
cells that enables the use of fast charge techniques provides the user with
the advantage of a reduced time to repeat duty and further extends the number
of cycles available during service life to unparalleled levels (figure 9).
The optimal cyclic performance shown in figure 9 is based on the battery being returned to full state of charge between cycles. It is possible to operate SBS EON Technology monoblocs and cells in a controlled partial state of charge condition to improve site operating expenditure savings, however, it is very important to ensure that the battery is periodically returned to full state charge to ensure that the battery does not suffer from reduced performance due to the build-up of irreversible sulphation. It is recommended to contact your EnerSys ® representative to obtain additional information and guidance for such PSoC applications.
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