Saft SNH User manual

Single cell range
Nickel-Cadmium batteries
Type SNH, SNM, SNL
Installation and operating
instructions
Important recommendations
Never allow a flame or fire to come near the battery. The electrolyte is harmful to
skin and to eyes in particular. In the event of contact with skin or eyes, wash
immediately with running water. If eyes are affected, flood with water and obtain
immediate medical attention. Wear goggles and gloves when handling electrolyte
and cells. Never use sulphuric acid or acidified water (pH lower than 5) to top-up
electrolyte as acid can destroy the battery. Use tools with insulated handles.
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.
■If the battery is shipped filled,
remove immediately the plastic
transport seals if used. The battery is
then ready for installation.
■If the battery is shipped discharged
and empty, do not remove the plastic
transport seals until ready to fill the
battery.
The battery must never be charged
with the plastic transport seal in place
as this can cause permanent damage.
2. Storage
Store the battery indoors in a dry and
clean location.
■A fully discharged, drained battery
with its plastic transport seal can be
stored for many years.
■A filled battery can be stored for a
maximum of 1 year.
It shall initially be fully charged.
3. Installation
3.1. Location
Install the battery in a dry and clean
room. Avoid direct sunlight, strong
daylight and heat.
The battery will give the best
perfomance and maximum service
life when the ambiant temperature is
between 10°C to 35°C.
3.2. Ventilation
During the last part of high-rate
charging, the battery is emitting
gases (oxygen-hydrogen mixture).
At normal float-charge the gas
evolution is very small but some
ventilation is necessary.
Note that special regulations for
ventilation may be valid in your
area depending on the application.
3.3. Mounting
Verify that cells are correctly
interconnected with the appropriate
polarity. The battery connection to load
should be with nickel plated cable lugs.
Recommended torques for connecting
screws are:
• M 6 = 11 ± 1.1 N.m
• M 8 = 20 ± 2 N.m
• M 10 = 30 ± 3 N.m
The connectors and terminal screws
should be corrosion-protected by
coating with a thin layer of neutral
vaseline or anti-corrosion oil.
Remove the transport seals and close
the vent plug.
3.4. Electrolyte / cell oil
The electrolyte to be used is: E22.
❑Cells delivered filled:
Check the level of electrolyte. The cells
must have a level of electrolyte above
the plates. If it is not the case, adjust
the level of electrolyte to 5 mm above
the plate tops with distilled water.
Cells delivered filled have already
the cell oil in place.
❑Cells delivered empty:
Fill empty cells to 5 mm above the
plate tops with electrolyte.
Then add the oil with the syringe,
according to the quantity indicated in
the table.
4. Commissioning charge
A good commissioning charge is
important.
Charge at constant current is
preferable.
4.1. Cells stored less than 1 year filled:
Charge 15 h at 0.2 C5 A (see value of
0.2 C5 A in the table). If necessary wait
at least 4 hours after end of charge and
adjust the level to the high level mark by
adding distilled or dionized water.
4.2. Cells which have been filled from
discharged and empty:
Charge 15 h at 0.2 C5 A. Discharge to
1.0 V/cell ; charge 10 h at 0.2 C5 A
(see value of 0.2 C5 A in the table). If
necessary wait at least 4 hours after
end of charge and adjust the level to
the high level mark by adding
electrolyte.
When it is not possible to charge at
constant current, the charge may be
done with constant voltage:
20 to 30 h at 1.65 V/cell, if the
current limit is approximately the same
as in the table. If it is lower, charge
for longer time.
When the charger maximum voltage
setting is too low to supply constant
current charging, divide the battery into
two parts to be charged individually.
The battery can now be put in service.
It is not recommended to store cells for
more than 1 year. However, should
this be unavoidable, please follow
instructions 4.2 adding distilled or
dionized water instead of electrolyte.
Edition June 1999
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Société Anonyme au capital de 500 11900 F - RCS Bobigny B 343 588 737 - Pragma - Imprimé en France
5. Charging in service
■Continuous parallel operation, with
occasional battery discharge.
Recommended charging voltage:
❑for two level charge:
• float level
= 1.42 V/cell for SNL
= 1.40 V/cell for SNH and SNM
• high level
= 1.47 - 1.70 V/cell for SNL
=
1.45 - 1.70 V/cell for SNH and SNM
A high voltage will increase the speed
and efficiency of the recharging;
❑for single level charge:
1.43 -1.50 V/cell.
■Buffer operation, where the load
exceeds the charger rating.
Recommended charging voltage:
1.50 - 1.60 V/cell.
■Discontinuous operation, with short
heavy-current discharges or other
shallow discharges.
8 h with the current in the table or
15 h at 1.65 V/cell.
6. Periodic Maintenance
■Keep the battery clean using only
water.
Do not use a wire brush or solvents of
any kind. Vent caps can be rinsed in
clean water if necessary.
■Check the electrolyte level. Never
let the level fall below the lower mark.
Use only distilled or deionized water
to top up. Experience will tell the time
interval between topping up.
■Check at least once yearly that all
connectors are tight.
The connectors and terminal screws
should be corrosion-protected by
coating with a thin layer of neutral
vaseline or anti-corrosion oil.
■Check the charging voltage.
In parallel operation, it is of great
importance that the recommended
charging voltage remains unchanged.
The charger should be checked at
least once yearly.
High water consumption of the battery
is usually caused by improper voltage
setting of the charger.
7. Changing electrolyte
In most stationary battery applications,
the electrolyte will retain its effectiveness
f
or the life of the battery. However,
under special battery operating
conditions, if the electrolyte is found
to be carbonated, the battery
performance can be restored by
replacing the electrolyte.
The electrolyte type to be used for
replacement in these cells is: E13.
Refer to "Electrolyte Instructions".
Advanced and Industrial Battery Group
156, avenue de Metz
93230 Romainville - France
Tel.: + 33 (1) 49 15 36 00
Fax: + 33 (1) 49 15 34 00
Doc N° 06.99 - 21080.2
Published by the Communication Department
Data in this document are subject to change
without notice and become contractual
only after written confirmation.
SNH 9 1.8 0.22 0.73 15 M6
SNH 12 2.4 0.20 0.66 15 M6
SNH 17 3.4 0.18 0.60 15 M6
SNH 21 4.2 0.34 1.1 25 M6
SNH 25 5.0 0.32 1.1 25 M6
SNH 29 5.8 0.30 0.98 25 M6
SNH 34 6.8 0.28 0.92 25 M6
SNH 40 8.0 0.79 2.6 35 M8
SNH 50 10 0.74 2.4 35 M8
SNH 60 12 0.69 2.3 35 M10
SNH 70 14 0.64 2.1 35 M10
SNH 80 16 0.69 2.0 35 M10
SNH 90 18 0.96 3.1 50 M10
SNH 100 20 0.91 3.0 50 M10
SNH 110 22 0.86 2.8 50 M10
SNH 120 24 0.81 2.7 50 M10
SNH 130 26 1.05 3.4 50 M10
SNH 145 29 0.98 3.2 50 M10
SNH 155 31 0.92 3.0 50 M10
SNH 185 37 1.34 4.4 70 2 xM10
SNH 210 42 1.22 4.0 70 2 xM10
SNM 9 1.8 0.24 0.77 15 M6
SNM 14 2.8 0.22 0.72 15 M6
SNM 22 4.4 0.19 0.62 15 M6
SNM 31 6.2 0.16 0.53 15 M6
SNM 39 7.8 0.32 1.0 25 M6
SNM 47 9.4 0.29 0.94 25 M6
SNM 55 11 0.26 0.84 25 M6
SNM 70 14 0.75 2.4 35 M8
SNM 90 18 0.66 2.1 35 M8
SNM 110 22 0.62 2.0 35 M10
SNM 130 26 0.55 1.8 35 M10
SNM 145 29 0.89 2.9 50 M10
SNM 165 33 0.82 2.7 50 M10
SNM 185 37 0.75 2.5 50 M10
SNM 215 43 0.95 3.1 50 M10
SNM 240 48 0.86 2.8 50 M10
SNM 285 57 1.30 4.2 70 2 xM10
SNM 310 62 1.21 4.0 70 2 xM10
SNM 335 67 1.13 3.7 70 2 xM10
SNL 10 2.0 0.24 0.77 15 M6
SNL 15 3.0 0.22 0.72 15 M6
SNL 21 4.2 0.21 0.67 15 M6
SNL 30 6.0 0.18 0.58 15 M6
SNL 38 7.6 0.32 1.0 25 M6
SNL 45 9.0 0.32 1.0 25 M6
SNL 59 12 0.28 0.90 25 M6
SNL 70 14 0.79 2.6 35 M8
SNL 85 17 0.70 2.3 35 M10
SNL 105 21 0.70 2.3 35 M10
SNL 135 27 0.60 2.0 35 M10
SNL 170 34 0.91 3.0 50 M10
SNL 205 41 0.82 2.7 50 M10
SNL 220 44 1.05 3.4 50 M10
SNL 260 52 0.93 3.0 50 M10
SNL 310 62 1.35 4.4 70 2 xM10
SNL 355 71 1.23 4.0 70 2 xM10
* value for E22
Cell type Charging Current Electrolyte per cell Quantity of oil Cell connection
0.2C5(A) Solid* (kg) liquid (l) ml/vent bolt per pole
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