8/13/2019 VNT D Technical Specification

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SPECIFICATION FORVNT D

NS 1.011.138 Series: 197 Issue: A/ January 2009Information in this specification is subject to change without notice and becomes contractual only after written confirmation by Saft.

CONTENTS

1/ SCOPE

2/ GENERAL ELECTRICAL CHARACTERISTICS

3/ GENERAL MECHANICAL CELL SPECIFICATION

4/ CAPACITY

5/ CHARGE RECOMMENDATIONS

6/ CYCLE LIFE

7/ CELL AND BATTERY MANAGEMENT

8/ SPECIFICATION APPROVALS

8/13/2019 VNT D Technical Specification

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SPECIFICATION FORVNT D

NS 1.011.138 Series: 197 Issue: A/ January 2009Information in this specification is subject to change without notice and becomes contractual only after written confirmation by Saft.

1/ SCOPE

This specification applies to a Nickel-Cadmium cylindrical rechargeable single cell whichSAFT designate as VNT D. This cell belongs to the SAFT High temperature Ni-Cd cell seriesand has been designed for permanent charge applications at elevated temperature. TheVNT D is designed with a new positive electrode technology (plastic bonded electrode called

PNE) and with a standard negative electrode.

2/ GENERAL ELECTRICAL CHARACTERISTICS

All the figures listed in the following tables are based on fresh single cells.Tests carried out in accordance with International standard document IEC 61951-1.

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SPECIFICATION FORVNT D

NS 1.011.138 Series: 197 Issue: A/ January 2009Information in this specification is subject to change without notice and becomes contractual only after written confirmation by Saft.

ITEM SPECIFICATION UNITS NOTES

MAIN CHARACTERISTICS As per IEC 61951-1

SAFT cell designation VNT D

IEC cell designation KRMT 33/62

Nominal voltage 1.2 VoltRated IEC capacity 4000 mAh

Typical impedance 6 mOhm At 1000 Hz

CHARGE CURRENT

Permanent 200 mA

Trickle* 100-130 mA * After a full charge

DISCHARGE CURRENT

Maximum continuous current14 A

Max end of dischargevoltage 0.8V/cell

Max peak (65 %Storage in full charge state

discharged atC/5

TEMPERATURE RANGE

In permanent charge 15 to 400 to 15 & 40 to 70

CC Short duration < 1 month

In discharge -20 to 70 C

In storage See 7

Recommended 5/25 C

Low limit rangeHigh limit range

-40 to +525 to + 70

C Shorter than 1 month

TYPICAL WEIGHT 115 g

8/13/2019 VNT D Technical Specification

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SPECIFICATION FORVNT D

NS 1.011.138 Series: 197 Issue: A/ January 2009Information in this specification is subject to change without notice and becomes contractual only after written confirmation by Saft.

3/GENERALMECHANICALCELLSPECIFICATION

BARE CELL DRAWING BARE CELL DIMENSIONS (mm)

Diameter:D= 32.15 +/- 0.10

Height:H= 59.9 +/- 0.4

Positive contact

Flat area diameter:d= 5.6

Overstep:h= 3.1 +/- 0.4

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8/13/2019 VNT D Technical Specification

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SPECIFICATION FORVNT D

NS 1.011.138 Series: 197 Issue: A/ January 2009Information in this specification is subject to change without notice and becomes contractual only after written confirmation by Saft.

6/CYCLELIFE

Cycle Life duration of a VNT D cell or battery pack depends mainly on the cell or batterypack temperature and overcharged capacity. Minimum life duration of a VNT D cell/battery is4 years with the average operating condition of:

Temperature: up to+40 +/- 2C

Permanent Charge current: 200 mA constant current (C/20)

Discharge: 1-2 per month (at C rate. Maximum)) (1V/cell cut-off)

The VNT D cell is designed to comply with the normative permanent charge endurancetest described in the IEC 61951-1 standard.This performance is mandatory for use in Emergency Lighting Units to comply with the IEC60598 2.22.

7/CELLANDBATTERYMANAGEMENT

Overcharge :

Repeated overcharge out of the specification could lead to leakage and deterioration of thecell.

Over discharge :

A deep discharge or over discharge can limit the cell performance so it is recommended toturn the switch off at the end of discharge and to avoid letting the cell or battery packconnected to the equipment (luminaire).In addition, during the beginning of the first charge following over discharge, the voltage canexceed the maximum allowed value.

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SPECIFICATION FORVNT D

NS 1.011.138 Series: 197 Issue: A/ January 2009Information in this specification is subject to change without notice and becomes contractual only after written confirmation by Saft.

Storage :

Normal conditions:

SAFT recommends storing the cell or battery pack disconnected from the equipment within atemperature range of +5 to +25C in a 65 5% relative humidity atmosphere.

Long term storage (up 12 months):

Up to 12 months storage in open circuit at Room Temperature, there is no irreversible loss ofcapacity, up to 5 IEC cycles are allowed to recover the complete initial performance of aVNT D (see section 4).It is recommended to store the batteries cells in state of chargearound 50%.

Service life :

When a cell or battery pack is used under normal conditions as described above, the VNT D

cell or battery pack will last 4 years. Failure in charging, discharging, storage or temperaturerange can reduce the service life and damage the cell performances.

Battery assembly :

Consult SAFT for advice in battery assembly.

8/13/2019 VNT D Technical Specification

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SPECIFICATION FORVNT D

NS 1.011.138 Series: 197 Issue: A/ January 2009Information in this specification is subject to change without notice and becomes contractual only after written confirmation by Saft.

8/ SPECIFICATION APPROVALS