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IEC 62973-2
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Rolling stock – Batteries for auxiliary power supply
systems –
Part 2: Nickel Cadmium (NiCd) batteries
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IEC 62973-2
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Rolling stock – Batteries for auxiliary power supply
systems –
Part 2: Nickel Cadmium (NiCd) batteries
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 45.060.01; 29.220.99 ISBN 978-2-8322-8234-2
– 2 – IEC 62973-2:2020 © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 11
4 General requirements . 12
4.1 Definitions of components of a battery system, refer to Figure 1 (images are
examples) . 12
4.2 Definitions of NiCd battery type . 12
4.2.1 General . 12
4.2.2 Sintered/PBE plate/electrode technology . 13
4.2.3 Sintered/sintered plate/electrode technology . 13
4.2.4 Fiber plate/electrode technology . 13
4.2.5 Pocket plate/electrode technology . 13
4.3 Environmental conditions . 13
4.4 System requirements . 13
4.4.1 System voltage . 13
4.4.2 Charging requirements . 15
4.4.3 Discharging requirements . 17
4.4.4 Charge retention (self-discharge) . 18
4.4.5 Requirements for battery capacity sizing. 18
4.5 Safety and protection requirements . 19
4.5.1 General . 19
4.5.2 Deep discharge of batteries . 19
4.5.3 Temperature compensation during charging . 20
4.6 Fire protection . 20
4.7 Maintenance . 20
4.8 Charging characteristics . 20
4.9 Optional additional components to battery system . 20
4.9.1 General . 20
4.9.2 Battery information system . 21
4.9.3 Battery heater . 21
4.9.4 Thermostat or cut-off switch. 21
5 Mechanical design of battery system . 21
5.1 General . 21
5.2 Interface mechanism . 21
5.3 Location of battery system on the vehicle . 21
5.4 Accessibility to the battery . 22
5.5 Shock and vibration . 22
5.6 Ventilation of battery box . 22
5.7 Water filling system . 22
6 Electrical interface . 22
6.1 General . 22
6.2 External electrical connections interface . 23
7 Markings. 23
7.1 Safety signs . 23
7.1.1 Outside the box . 23
7.1.2 Tray, crate or other places inside the box . 23
7.1.3 Cells or monobloc batteries . 23
7.2 Nameplate . 24
7.2.1 Battery box . 24
7.2.2 Nameplates on tray, crate or other nameplates inside the box . 24
7.2.3 Cells or monoblocs . 24
8 Storage and transportation conditions . 24
8.1 Transportation . 24
8.2 Storage of batteries . 24
9 Testing . 25
9.1 General . 25
9.2 Type test . 25
9.2.1 General . 25
9.2.2 Parameter measurement tolerances . 26
9.2.3 Electrical characteristic tests . 26
9.2.4 Dielectric test . 26
9.2.5 Load profile test . 26
9.2.6 Shock and vibration test . 26
9.3 Routine test . 27
9.3.1 General . 27
9.3.2 Visual checks . 27
9.3.3 Dielectric test . 27
9.3.4 Electrical characteristics tests . 27
Annex A (informative) Examples of typical load profiles . 28
A.1 General . 28
A.2 Example of load profile – High speed train (Figure A.1) . 28
A.3 Example of load profile – Regional train/ EMU (Figure A.2) . 29
Annex B (normative) NiCd load profile verification . 30
B.1 General . 30
B.2 General methodology . 30
B.3 Battery sizing documentation . 31
B.4 Operational verification (load profile test) . 31
B.5 Test report . 32
Annex C (informative) Declaration of cell model range representative of the testing . 33
C.1 Electrical performance declaration . 33
C.2 Shock and vibration declaration . 33
Bibliography . 34
Figure 1 – Definition of NiCd cell(s), monobloc battery, crate, tray, and box . 12
Figure 2 – Example of a NiCd cell discharge curve at various constant discharge
currents based on percentage of capacity . 14
Figure 3 – Example of a NiCd cell charge curves . 15
Figure 4 – Typical NiCd battery charging characteristics . 17
Figure 5 – Typical schematic of an electrical interface of a battery system . 23
– 4 – IEC 62973-2:2020 © IEC 2020
Figure A.1 – Example of load profile for high speed train (without starting up segment) . 28
Figure A.2 – Example of load profile for regional train/ EMU (without starting up
segment) . 29
Table 1 – Requirements
...