IEC 62973-2:2020

Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part 2: Nickel Cadmium (NiCd) batteries

IEC 62973-2:2020 applies to NiCd rechargeable batteries for auxiliary power supply systems used on railway vehicles. It is an extension of IEC 62973-1:2018 which specifies common requirements for all battery technologies of other parts of IEC 62973. Unless otherwise specified, the requirements of IEC 62973-1:2018 apply.
Battery systems described in this document are used in conjunction with charging systems onboard rolling stock, as described in IEC 62973-1:2018. Charging systems (e.g. LVPS, converters, etc.) are excluded from the scope of this document.
This document also specifies the design, operation parameters, safety recommendations, routine and type tests, as well as marking and designation. This document is used in addition to IEC 60623:2017 or IEC 62259:2003 for NiCd Cells.

General Information

• Status: Published
• Publication Date: 26-May-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.220.99 - Other cells and batteries
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: TC 9 - Electrical equipment and systems for railways
• Drafting Committee: PT 62973-2 - TC 9/PT 62973-2
• Current Stage: PPUB - Publication issued
• Start Date: 22-May-2020
• Completion Date: 27-May-2020

Standards Content (Sample)

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
...