Enersys PowerSafe SBS-C11FT User manual

Type
User manual

Enersys PowerSafe SBS-C11FT is a high-performance Thin Plate Pure Lead (TPPL) battery designed for reliable power backup in critical applications. It offers extended service life, exceptional cyclic performance, and superior resistance to harsh environments. Ideal for uninterruptible power supplies (UPS), telecommunications systems, and other demanding applications, the PowerSafe SBS-C11FT ensures uninterrupted operation and peace of mind.

Enersys PowerSafe SBS-C11FT is a high-performance Thin Plate Pure Lead (TPPL) battery designed for reliable power backup in critical applications. It offers extended service life, exceptional cyclic performance, and superior resistance to harsh environments. Ideal for uninterruptible power supplies (UPS), telecommunications systems, and other demanding applications, the PowerSafe SBS-C11FT ensures uninterrupted operation and peace of mind.

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Application
Guide
EnerSys® has optimised the very successful Thin
Plate Pure Lead (TPPL) PowerSafe® SBS battery
range to create the revolutionary EON Technology®,
a concept that utilises 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 oat life but, as applications evolve from pure
standby to cyclic applications, some traditional VRLA
technologies nd that these new requirements push them
beyond their scope of operation.
PowerSafe SBS EON Technology monoblocs and cells retain
the long oat characteristics of standard PowerSafe SBS,
with the added benet of improved cyclic ability in both oat
voltage and fast charge applications.
Applications
Table 1 below gives description of the range of reserve power
applications covering stable grid, unreliable grid and off grid
applications – the superior performance characteristics of PowerSafe
SBS EON Technology make it the ideal solution to be used in these
applications.
Whilst PowerSafe SBS EON Technology solutions are well proven
in standby applications, recent developments have focused on
improving robustness in harsh environments and challenging operating
conditions. Today EON Technology has higher cyclic performance,
improved endurance at high temperature and the ability to operate
in partial state of charge conditions, providing that the operating
conditions are well understood.
Application Battery Demands Suitability
Reliable Grid Stable grid
Controlled ambient tempature
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 for uncontrolled Partial State of Charge
Yes
Off Grid
Controlled Full
State of Charge
Regular cyclic duty
Battery is returned to full state of charge
between cycles
Battery can be exposed to fluctuating
ambient temperature
Balances Opex 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 be exposed to fluctuating
ambient temperatures
Designed to maximise 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 PowerSafe® 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
unlimited
✔ Return to full state of charge between discharge cycles
✔ Optimum charge factor 103% of discharged Ah
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, PowerSafe SBS EON Technology
monoblocs and cells can be operated in the temperature range -40°C
to +50°C.
In order to maintain 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
PowerSafe 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.
2
Table 1
2.17
2.16
2.15
2.14
2.13
2.12
2.11
2.10
100
96
91
87
83
79
74
70
Open Circuit Voltage per Cell
Approx. State of Charge (%)
Months
0612182430364248
+40°C+30°C+25°C+20°C+10°C
Table 2
Figure 1
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 rst.
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 oat applications
the commissioning charge shall consist of 7 continuous days of oat
charge at the recommended oat voltage (2.29Vpc at 20°C) with no
load connected to the battery. In hybrid applications the commissioning
charge shall consist of 24 hours charge at a voltage equivalent to
2.40Vpc with no load connected.
Float Operation
EON Technology® is designed for continuous oat operation on
constant voltage chargers. Constant voltage charging is the safest,
most efcient and recommended method of charging VRLA batteries.
The recommended oat 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 gure 3). Float voltage compensation reduces the
charging current as battery temperature increases and partially negates
the adverse effect of high temperature.
The recommended oat 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 gure 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 insufcient overvoltage
to keep the battery in a fully charged condition.
Float Charging Current Limit
Due to the very low internal resistance, PowerSafe® SBS EON
Technology monoblocs and cells will accept unlimited current during
recharge but for cost and practical purposes in oat applications where
recharge time to repeat duty is not critical, the rectier current can be
limited to the load plus 0.1C10 Amps.
Fast Charging Operation
In addition to the long life characteristics inherent in traditional
PowerSafe® 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 utilised for frequent discharge cyclic
applications. The high charge acceptance of EON Technology is suited
for applications which require a faster recharge with reduced time to
repeat duty. In such applications the rectier 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.
3
Float Life
(Float @ 55°C Using Recommended FV for 20°C)
Figure 2
Nominal C Capacity (%)
8
Figure 3
Service Life as a Function of Temperature
(Continuous Float Operation - Uncompensated FV)
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
11.00
12.00
13.00
14.00
15.00
16.00
15 20 25 30 35 40 45 50 55 60 65 70
SBS Eon SERVICE LIFE AS A FUNCTION OF TEMPERATURE
(continuous float operation - uncompensated FV)
Service Life (Years)
Temperature (ºC)
Float Voltage Temperature Correction
Figure 4
2.22
2.23
2.21
2.20
2.19
2.24
2.25
2.26
2.27
2.28
2.29
2.30
2.31
2.32
2.33
2.34
2.35
Te mperature C)
Float Volts Per Cell
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
42
Recommended Float Voltage
Minimum Float Vo ltage
Voltages > Recommended promote
overcharge & high float currents resulting
in accelerated end of service life
Voltages < Minimum recommended
result in undercharge, r eduction in
capacity and irrecoverable capacity
loss leading to premature end of life
EnerSys World Headquarters
2366 Bernville Road, Reading,
PA 19605, USA
Tel: +1-610-208-1991 /
+1-800-538-3627
EnerSys EMEA
EH Europe GmbH,
Baarerstrasse 18,
6300 Zug
Switzerland
EnerSys Asia
152 Beach Road,
Gateway East Building #11-03,
Singapore 189721
Tel: +65 6416 4800
© 2022 EnerSys. All rights reserved. Trademarks and logos are the property of EnerSys and its afliates unless otherwise noted. Subject to revisions without prior notice. E.&O.E.
Contact:
Publication No: EMEA-EN-AG-PS-SBSEON-0722
As with oat charge, temperature compensation for voltage is
applicable to fast charge techniques. The prole below (gure 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 inuence of charge voltage, the available charge
current will impact on time to repeat duty. The low internal resistance of
PowerSafe® 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 oat life
characteristics associated with standard PowerSafe 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 PowerSafe SBS EON Technology
monoblocs and cells that enables the use of fast charge techniques
provides the user with the advantage of reduced time to repeat duty
and further extends the number of cycles available during service life to
unparalleled levels (gure 9).
The optimal cyclic performance shown in gure 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
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.
110
100
90
80
70
60
50
40
30
20
10
0
% Depth of Discharge (C
10
)
Ti me to 100% State of Charge (Hrs)
0246 810121
41
6
Fast Charge 2.40VpcFloat Recharge
Recharge Time to 100% State of Charge following C10 Discharge
to Varying Depths of Discharge.
(Current Limit 25% C10)
Figure 5
Fast Charge Temperature Correction
Figure 6
2.53
2.51
2.49
2.47
2.45
2.43
2.41
2.39
2.37
2.35
2.33
2.31
2.29
2.27
2.25
10 15 20 25 30 35 40 45 5
0
Volts Per Cell
Te mperature C)
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
7000
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75
Cycles
% Depth of Discharge
Figure 8
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
16000
10 15 20 25 30 35 40 45 50 55 60 65 70
% Depth of Discharge
Cycle Life in Fast Charge Applications
(When Charged in Accordance with EnerSys® Charging Strategy)
Cycle Life in Typical Unreliable Grid Applications
Time to Full State of Charge
As a Function of Current Limit and Depth of Discharge
(Recharge 2.40Vpc)
Figure 7
% Depth of Discharge
Time (Hrs)
0
2
4
6
8
10
12
14
16
18
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
TIME (HRS)
DEPTH OF DISCHARGE
TIME TO FULL STATE OF CHARGE
AS A FUNCTION OF CURRENT LIMIT AND DEPTH OF DISCHARGE at 2.40Vpc
0.2C10 Amps
0.3C10 Amps
1C10 Amps
0.5C10 Amps
0.1C10A
0.2C10A
0.3C10A
1C10A
0.5C10A
0.1C10 Amps
Figure 9
% Depth of Discharge
Number of Cycles
Number of Cycles
% Depth of Discharge
% Depth of Discharge
Temperature (°C)
Volts per Cell
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Enersys PowerSafe SBS-C11FT User manual

Type
User manual

Enersys PowerSafe SBS-C11FT is a high-performance Thin Plate Pure Lead (TPPL) battery designed for reliable power backup in critical applications. It offers extended service life, exceptional cyclic performance, and superior resistance to harsh environments. Ideal for uninterruptible power supplies (UPS), telecommunications systems, and other demanding applications, the PowerSafe SBS-C11FT ensures uninterrupted operation and peace of mind.

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