IEC 62973-4:2021

Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part 4: Secondary sealed nickel-metal hydride batteries

IEC 62973-4:2021

Name:IEC 62973-4:2021   Standard name:Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part 4: Secondary sealed nickel-metal hydride batteries
Standard number:IEC 62973-4:2021   language:English and French language
Release Date:20-Jan-2021   technical committee:TC 9 - Electrical equipment and systems for railways
Drafting committee:PT 62973-4 - TC 9/PT 62973-4   ICS number:45.060.01 - Railway rolling stock in general

IEC 62973-4
Edition 1.0 2021-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Rolling stock – Batteries for auxiliary power supply
systems –
Part 4: Secondary sealed nickel-metal hydride batteries

Applications ferroviaires – Materiel roulant –Batteries pour systemes
d'alimentation auxiliaire –
Partie 4: Batterie d'accumulateurs nickel-hydrure métallique étanche





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IEC 62973-4
Edition 1.0 2021-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Rolling stock – Batteries for auxiliary power supply

systems –
Part 4: Secondary sealed nickel-metal hydride batteries

Applications ferroviaires – Materiel roulant –Batteries pour systemes

d'alimentation auxiliaire –
Partie 4: Batterie d'accumulateurs nickel-hydrure métallique étanche

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 45.060.01 ISBN 978-2-8322-9279-2

– 2 – IEC 62973-4:2021 © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 9
4 General requirements . 9
4.1 Definitions of components of a battery system (images are examples) . 9
4.2 Definition of battery type . 10
4.2.1 General . 10
4.2.2 Cell designation . 10
4.2.3 Prismatic cells . 10
4.2.4 Cylindrical cells . 10
4.3 Environmental conditions . 10
4.3.1 Battery system . 10
4.3.2 Battery module . 10
4.4 System requirements . 11
4.4.1 System voltage . 11
4.4.2 Charging requirements . 12
4.4.3 Discharging requirements . 15
4.4.4 Charge retention (self-discharge) . 16
4.4.5 Requirements for battery capacity sizing. 16
4.5 Safety and protection requirements . 17
4.5.1 General . 17
4.5.2 Deep discharge of batteries . 17
4.5.3 Temperature compensation during charging . 17
4.6 Fire protection . 17
4.7 Maintenance . 17
5 Mechanical design of battery system . 17
6 Electrical interface . 18
7 Markings. 18
7.1 Safety signs . 18
7.2 Nameplate . 18
7.2.1 General . 18
7.2.2 Battery modules and cells . 18
8 Storage and transportation conditions . 18
8.1 Transportation . 18
8.2 Storage of battery . 18
9 Testing . 19
9.1 General . 19
9.2 Parameter measurement tolerances . 19
9.3 Type test . 20
9.3.1 General . 20
9.3.2 Electrical characteristic tests . 20
9.3.3 Dielectric test . 21
9.3.4 Load profile test . 21

9.3.5 Shock and vibration test . 21
9.3.6 Reliability test . 21
9.4 Routine test . 21
9.4.1 General . 21
9.4.2 Visual checks . 21
9.4.3 Dielectric test . 21
9.4.4 Measurement of open circuit voltage . 22
9.4.5 Measurement of Internal resistance . 22
Annex A (informative) Other configuration of the battery charging system . 23
A.1 General . 23
A.2 Charging requirements for the main charger . 23
A.3 Charging requirements for the additional charger . 24
A.3.1 General . 24
A.3.2 Temperature compensation during charging . 25
Annex B (informative) Declaration of cell model range representative of the testing . 26
B.1 Electrical performance declaration . 26
B.2 Shock and vibration declaration . 26
Bibliography . 27

Figure 1 –Definition of cell(s), battery module, crate, tray and battery box . 9
Figure 2 – Example of discharge curves at various constant discharge currents based
on percentage of capacity . 11
Figure 3 – Examples of Ni-MH charge curves. 12
Figure 4 – Example of interfaces between battery box and battery charging system. 13
Figure 5 – Typical charging characteristic of secondary sealed nickel-metal hydride

battery . 15
Figure A.1 – Example of interface with the additional charger in the battery box .
...

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