prEN IEC 62973-5:2025

SLOVENSKI STANDARD
01-december-2025
Železniške naprave - Vozna sredstva - Baterije za pomožne močnostne napajalne
sisteme - 5. del: Litij-ionske baterije
Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part
5: Lithium-ion batteries
Bahnanwendungen - Fahrzeuge - Batterien für Bordnetzversorgungssysteme – Teil 5:
Lithium-Ionen Batterien
Applications ferroviaires - Matériel roulant -Batteries pour systèmes d'alimentation
auxiliaire - Partie 5: Batteries lithium-ion
Ta slovenski standard je istoveten z: prEN IEC 62973-5:2025
ICS:
29.220.20 Kislinski sekundarni členi in Acid secondary cells and
baterije batteries
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN IEC 62973-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2025
ICS 29.220.20 -
English Version
Railway applications - Rolling stock - Batteries for auxiliary
power supply systems - Part 5: Lithium-ion batteries
(IEC 62973-5:2023)
Applications ferroviaires - Matériel roulant -Batteries pour Bahnanwendungen - Fahrzeuge - Batterien für
systèmes d'alimentation auxiliaire - Partie 5: Batteries Bordnetzversorgungssysteme - Teil 5: Lithium-Ionen
lithium-ion Batterien
(IEC 62973-5:2023) (IEC 62973-5:2023)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2026-01-02.

The text of this draft consists of the text of IEC 62973-5:2023.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 81987 Ref. No. prEN IEC 62973-5:2025 E

European foreword
This document (prEN IEC 62973-5:2025) consists of the text of IEC 62973-5:2023 prepared by IEC/TC 9
"Electrical equipment and systems for railways".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this document has (doa) dav+ 6 months
to be announced at national level
• latest date by which this document has to be (dop) dav+ 12 months
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards conflicting (dow) dav+ 36 months
with this document have to be withdrawn (to be confirmed or
modified when voting)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60077-1 2017 Railway applications - Electric equipment EN 60077-1 2017
for rolling stock - Part 1: General service
conditions and general rules
IEC 62498-1 2010 Railway applications - Environmental - -
conditions for equipment - Part 1:
Equipment on board rolling stock
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
- - + AC 1993
+ A1 1999 + A1 2000
+ A2 2013 + A2 2013
IEC 62619 2022 Secondary cells and batteries containing EN IEC 62619 2022
alkaline or other non-acid electrolytes -
Safety requirements for secondary lithium
cells and batteries, for use in industrial
applications
IEC 62620 2014 Secondary cells and batteries containing EN 62620 2015
alkaline or other non-acid electrolytes -
Secondary lithium cells and batteries for
use in industrial applications
IEC 62928 2017 Railway applications - Rolling stock - EN IEC 62928 2018
Onboard lithium-ion traction batteries
IEC 62973-1 2018 Railway applications - Rolling stock - EN IEC 62973-1 —
Batteries for auxiliary power supply
systems - Part 1: General Requirements
ISO 7010 2019 Graphical symbols - Safety colours and EN ISO 7010 -
safety signs - Registered safety signs

Under preparation. Stage at the time of publication: prEN IEC 62973-1:2025.
IEC 62973-5 ®
Edition 1.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Railway applications – Rolling stock – Batteries for auxiliary power supply
systems –
Part 5: Lithium-ion batteries
Applications ferroviaires – Matériel roulant – Batteries pour systèmes
d'alimentation auxiliaire –
Partie 5: Batteries lithium-ion
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20; 45.060.01 ISBN 978-2-8322-7369-2
– 2 – IEC 62973-5:2023 © IEC 2023
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 . 10
4 General requirements . 11
4.1 Architecture of an auxiliary battery system in the train . 11
4.2 Definitions of components of a battery system . 12
4.3 Definitions of battery type . 13
4.3.1 General . 13
4.3.2 Designations for cells and battery system . 14
4.4 Environmental conditions . 14
4.4.1 Battery system . 14
4.4.2 Battery pack/module . 14
4.5 System requirements . 14
4.5.1 System voltage . 14
4.5.2 Charging requirements . 15
4.5.3 Discharging requirements . 16
4.5.4 Charge retention (self-discharge) . 17
4.5.5 Requirements for battery capacity sizing. 17
4.6 Safety and protection requirements . 18
4.6.1 General . 18
4.6.2 Deep discharge of batteries . 18
4.6.3 Temperature related parameters for charge . 18
4.6.4 Exceptional use case of the battery system . 18
4.7 Fire protection . 18
4.8 Maintenance . 19
4.9 Charging characteristics . 19
4.10 Battery management system (BMS) . 19
5 Mechanical design of battery system . 19
5.1 General . 19
5.2 Interface mechanism . 20
5.2.1 General . 20
5.2.2 Fixed type . 20
5.2.3 Roller type . 20
5.2.4 Slide type . 20
5.3 Location of battery system on the vehicle . 20
5.4 Accessibility to the battery . 20
5.5 Ventilation and air flow management of the battery . 20
6 Electrical interface . 21
6.1 General . 21
6.1.1 General overview . 21
6.1.2 Electrical interface for shore supply (optional) . 22
6.2 External electrical connections interface . 23
6.3 Control and communication . 23

IEC 62973-5:2023 © IEC 2023 – 3 –
6.4 Maintenance . 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 battery pack/modules . 24
7.2 Nameplate . 24
7.2.1 Battery box . 24
7.2.2 Nameplates on tray or other nameplates inside the box . 24
7.2.3 Cells or battery pack/modules . 24
8 Storage and transportation conditions . 24
8.1 Transportation . 24
8.2 Storage of batteries . 24
9 Testing .
...