SRM+ Ni-Cd batteries

June 2012
SRM+ Ni-Cd batteries
Installation and operating instructions
Important recommendations
3. Installation
■Never
Remove the transport seals and close
the vent plugs.
3.1. Verify that cells are correctly
interconnected and that battery
connection to the load is also correct.
allow an exposed flame or
spark near the batteries,
particularly while charging.
■Never
smoke while performing any
operation on the battery.
■For
protection, wear rubber gloves,
long sleeves, and appropriate
splash goggles or face shield.
■The
electrolyte is harmful to skin
and eyes. In the event of contact
with skin or eyes, wash immediately
with plenty of water. If eyes are
affected, flush with water, and
obtain immediate medical attention.
■Remove
all rings, watches and
other items with metal parts before
working on the battery.
■Use
insulated tools.
■Avoid
static electricity and take
measures for protection against
electric shocks.
■Discharge
any possible static
electricity from clothing and/or tools by touching an earth-connected part "ground"
before working on the battery.
1. Receiving the shipment
Unpack the battery immediately upon
arrival. Do not overturn the package.
Transport seals are located under the
cover of the vent plug.
The battery is normally shipped filled
and ready for installation. Remove the
plastic transport seals. The battery is
then ready for installation.
The battery must never be used
electrically with the plastic transport
seal in place as this can cause
permanent damage.
2. Storage
Store the battery indoors in a dry,
clean, cool location (0°C to +30°C /
+32°F to +86°F).
■Make
sure that the transport seals
remain in place during storage.
■Do
not store in direct sunlight or
exposed to excessive heat.
■A
battery delivered discharged and
filled may be stored for many years
before it is installed.
■A
battery delivered charged (80%)
must not be stored more than
3 months (including transport).
3.2. Check tightness of terminal
connecting nuts. Torque applied should
be:
•10 ± 2 N.m for cells SRM+ 40 to 130
•30 ± 3 N.m for cells SRM+ 140 to 360
The connectors and terminal nuts
should be corrosion-protected by coating
with a thin layer of neutral vaseline or
anti-corrosion oil agreed by Saft.
■Single
level charge:
1.45 - 1.55 V/cell at +20°C (+68°F)
1.47 V/cell is recommended.
■Two
level charge:
• High level: 1.45 - 1.60 V/cell at +20°C (+68°F)
• Float level: 1.38 - 1.40 V/cell at +20°C (+68°F)
3.3. Electrolyte
The electrolyte to be used is E10.
5.2. Stand-by application
Battery is on float and discharged only
in emergency situation.
4. Commissioning
■Single
4.1. Discharged cells placed into
service immediately after delivery or
after less than one year of storage:
■Two
■Constant
current charge:
•8 h at 0.2 C5 A Caution: during charging, the battery
box must be open.
■Constant
potential charge:
•1.55 V/cell for 20 h, with the
current limited to 0.2 C5 A
Charge at constant current is
recommended. The battery is ready for
use.
4.2. Cells stored more than 1 year:
a) charge 10 h at 0.2 C5 A
b) discharge at 0.2 C5 A down to
1.0 V/cell
c) charge 8 h at 0.2 C5 A
The battery is ready for use.
4.3. Charged cells (80%) shipped
and/or stored at temperatures
>+30°C (> +86°F), and/or ≥ 3 months from date of charge:
a) charge 10 h at 0.2 C5 A
b) discharge at 0.2 C5 A down to 1.0 V/cell
c) charge 8 h at 0.2 C5 A
The battery is ready for use.
5. Charging in service
5.1. Cycling application
The battery is cycled up to 20% DOD
(Depth Of Discharge) per day.
level charge:
1.41 - 1.43 V/cell at +20°C (+68°F)
level charge:
• High level: 1.43 - 1.50 V/cell at +20°C (+68°F)
•Float level: 1.38 - 1.40 V/cell at +20°C (+68°F)
For use at temperature outside +10°C
to +30°C (+50°F to +86°F), the charge
voltage correcting factor is:
• – 3 mV/°C/cell (– 1.7 mV/°F/cell) if charging voltage between 1.45 and
1.55 V/cell at +20°C (+68°F)
For higher charging voltages, consult Saft.
To minimise the water usage, Saft recommends the use of low
charging voltages.
6. Topping-up
■Batteries
not equipped with water
filling system:
No electrolyte level measurement is
necessary if you use a Saft cell-topper,
which allows the correct level to be
obtained by a simple nozzle setting. See nozzle lengths in Table A.
If a cell-topper is not available, the
electrolyte level must be measured.
Insert a transparent glass or plastic
tube (alkali resistant, 5 to 6 mm in
diameter) vertically into the cell vent
until it touches the top of the plates.
Close the top end of the tube by putting
a finger on it and remove it from the
cell. The height of the liquid in the tube
indicates the electrolyte level.
SRM+ Ni-Cd batteries
Level (mm) high low
SRM+ 40 to 130
50
5
SRM+140 to 360
65
5
■Batteries
system:
equipped with water filling
•Remove transport seals and connect
hydraulic tubing between cells up to a maximum of 50 cells.
•Make sure that the tubes are
completely inserted for a good seal.
•The hydraulic connection of cells
must be in parallel to the electrical
connection, in order to avoid voltage differences of more than 1.2 V between two hydraulically
connected cells.
Table A:
Cell type
Capacity C5 Ah
(Ah)
Charge current
0.2 C5 A
(A)
Length of cell
topper nozzle
(mm)
SRM+ 40
40
8,0
65
SRM+ 70
70
14,0
65
SRM+ 80
80
16,0
65
SRM+ 90
90
18,0
65
SRM+ 100
100
20,0
65
SRM+ 120
120
24,0
65
SRM+ 130
130
26,0
65
SRM+ 140 140
28,0
70
SRM+ 160
160
32,0
70
•The hydraulic connection must be
horizontal in order to avoid siphoning.
SRM+ 180
180
36,0
70
•The water filling circuit output must
not be too close to electrical
equipment, electrical circuit, and
metallic structure.
SRM+ 200
200
40,0
70
SRM+ 220
220
44,0
70
SRM+ 240
240
48,0
70
SRM+ 260
260
52,0
70
•Water filling circuit input must be
connected to the self closing inlet.
•Topping-up can be performed by
gravity or using adapted pump with a
flow rate of 0.7 l/min at a relative
pressure of 0.3 bar maximum.
SRM+ 280
280
56,0
70
SRM+ 300
300
60,0
70
SRM+ 320
320
64,0
70
SRM+ 360
360
72,0
70
7. Periodic maintenance
■Maintenance
operations (not
including the topping-up operation):
Periodic maintenance should be
carried out every two years.
• Keep the battery clean using only
water. Do not use a wire brush or
solvents of any kind. Vent plugs can
be rinsed in clean water when dirty.
•Check that all connectors are tight. Coat with grease or neutral vaseline all terminal nuts and cell connectors.
•Check charger settings. It is of great
importance that the recommended
charging voltage remains unchanged.
High water consumption of the
battery is usually caused by improper
voltage setting of the charger.
■Topping-up
Frequency of topping-up must be
determined for each battery. It depends on charging voltage and
real utilization of the battery. Refer to section 6 concerning topping-up.
8. Changing electrolyte
Due to the sintered electrode plastic
bonded technology, it is not necessary
to change the electrolyte during the life
time of the cells.
9. Environment
To protect the environment all used
batteries must be recycled. Contact your local Saft representative for information.
operation:
Check the electrolyte level. Never let
the level fall below the minimum level
mark. Use only distilled or deionized
water to top-up.
Saft
Industrial Battery Group
Doc N° 21845-2-0612
Data in this document is subject to change without
notice and becomes contractual only after written
confirmation.
12, rue Sadi Carnot
93170 Bagnolet - France
Tel: +33 1 49 93 19 18
Fax: +33 1 49 93 19 64
Société par Actions Simplifiée au capital de 31 944 000 
RCS Bobigny B 383 703 873
www.saftbatteries.com
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