IEC 62973-3:2024
(Main)Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part 3: Lead acid batteries
Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part 3: Lead acid batteries
IEC 62973-3:2024 establishes the framework for the selection and operation of lead acid batteries of the VRLA type for auxiliary power supply systems on rolling stock of railways and complements IEC 62973-1, unless otherwise specified. This document provides guidance and links to standards for the required battery qualification tests procedures and safety measures to be implemented. In this document, the most appropriate clauses of these cited standards have been selected and adapted as needed to reflect the intended use of these batteries as auxiliary power sources on rolling stock of railways.
The battery-specific requirements for subcomponents of battery systems such as containers, charging controls, temperature probes, nameplates and similar are covered in this document as needed.
Charging systems are excluded from the scope of this document.
Applications ferroviaires - Matériel roulant - Batteries pour systèmes d'alimentation auxiliaire - Partie 3: Batteries au plomb
General Information
Standards Content (Sample)
IEC 62973-3 ®
Edition 1.0 2024-04
INTERNATIONAL
STANDARD
Railway applications – Rolling stock – Batteries for auxiliary power supply
systems –
Part 3: Lead acid batteries
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IEC 62973-3 ®
Edition 1.0 2024-04
INTERNATIONAL
STANDARD
Railway applications – Rolling stock – Batteries for auxiliary power supply
systems –
Part 3: Lead acid batteries
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.220.20; 45.040 ISBN 978-2-8322-8567-1
– 2 – IEC 62973-3:2024 © IEC 2024
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 9
4 General requirements . 9
4.1 Definitions of components of a battery system . 9
4.2 Description of lead acid battery types . 10
4.2.1 General . 10
4.2.2 Lead acid batteries with valve-regulated cell design and immobilized
electrolyte . 11
4.3 Environmental conditions . 11
4.4 System requirements . 12
4.4.1 System voltage . 12
4.4.2 Charging requirements . 13
4.4.3 Discharging performances . 16
4.4.4 Charge retention(self-discharge) . 17
4.4.5 Requirements for battery sizing . 17
4.5 Safety and protection requirements . 18
4.5.1 General . 18
4.5.2 Deep discharge of batteries . 18
4.5.3 Temperature compensation during charging . 19
4.6 Fire protection . 19
4.7 Maintenance . 19
4.8 Charging characteristics . 19
5 Optional components of a battery system . 20
5.1 General . 20
5.2 Battery information system . 20
5.3 Battery heater . 20
5.4 Thermostat or cut-off switch . 20
6 Mechanical design of battery system . 21
6.1 General . 21
6.2 Interface mechanism . 21
6.3 Shock and vibration . 21
6.4 Ventilation of battery box . 21
7 Electrical interface . 22
7.1 General . 22
7.2 External electrical connections interface . 22
8 Markings. 22
8.1 Safety signs . 22
8.1.1 Outside the box . 22
8.1.2 Tray, crate or other places inside the box . 22
8.1.3 Cells and monoblocs . 23
8.2 Nameplate . 23
8.2.1 Battery box . 23
8.2.2 Nameplates on tray, crate or other nameplates inside the box . 23
9 Storage and transportation conditions . 23
9.1 Transportation . 23
9.2 Storage . 23
10 Testing . 24
10.1 General . 24
10.2 Type test . 24
10.2.1 General . 24
10.2.2 Tests for cells and monoblocs. 24
10.2.3 Dielectric test . 25
10.2.4 Load profile test . 25
10.2.5 Shock and vibration test . 25
10.3 Routine test . 26
10.3.1 General . 26
10.3.2 Visual checks . 26
10.3.3 Dielectric test . 26
10.3.4 Cell and monobloc voltages . 26
Annex A (informative) Declaration of test unit equivalence . 27
Annex B (normative) Dielectric test . 28
Annex C (normative) Compliance of battery with energy demand of load profile(s) . 29
C.1 General . 29
C.2 Battery sizing . 29
C.3 Compliance with energy demand of load profile . 29
C.3.1 General . 29
C.3.2 Test facility . 29
C.3.3 Test batteries . 29
C.3.4 Test procedures . 30
C.3.5 Energy demand compliance . 30
C.3.6 Test report . 30
Bibliography . 31
Figure 1 – Definition of single cells, monobloc, crate, tray and battery box . 10
Figure 2 – Example of the evolution of the voltage of a VRLA cell when discharged
with multiples of the 5 h rated current versus percentage of the 5 h rated capacity . 12
Figure 3 – Examples of current and voltage evolution during charge . 13
Figure 4 – Temperature versus voltage response graph for float charge operation . 15
Figure 5 – Temperature versus voltage response graph for boost charge operation . 16
Figure 6 – Examples of horizontal installation of VRLA cells and monoblocs . 21
Figure 7 – Typical schematic view of an electrical interface of a battery system . 22
Table 1 – Requirements for battery system charge operations . 13
Table 2 – Typical lead acid battery charge parameters . 14
Table 3 – Voltage and temperature reference levels for float charge operation . 15
Table 4 – Voltage and temperature reference levels for boost charge operation . 16
Table 5 – Input parameters required for the sizing of the battery to be provided by the
system integrator or end user . 17
– 4 – IEC 62973-3:2024 © IEC 2024
Table 6 – Output parameters provided at the conclusion of the sizing of the battery to
be provided by the battery system manufacturer . 18
Table 7 – Type tests for cells and monoblocs . 25
Table B.1 – Sequence for dielectric test . 28
Table B.2 – Voltages for dielectric test . 28
INTERNATIONAL ELECTROTECHNICAL
...
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