High Temperature secondary Batteries - Part 2: Safety requirements and tests

This part of IEC 62984 specifies safety requirements and test procedures for high-temperature
batteries for mobile and/or stationary use and whose rated voltage does not exceed 1 500 V.
This document does not cover aircraft batteries, which are covered by IEC 60952 (all parts),
and batteries for the propulsion of electric road vehicles, covered by IEC 61982 (all parts).
NOTE High-temperature batteries are electrochemical systems whose cells' internal minimum operating
temperature is above 100 °C.

Hochtemperatur-Sekundärbatterien - Teil 2: Sicherheitsanforderungen und Prüfungen

Batteries d'accumulateur à haute temperature - Partie 2: Prescriptions de sécurité et essais

L'IEC 62984-2:2020 spécifie les exigences de sécurité et procédures d'essai relatives aux batteries d'accumulateurs à haute température pour usage mobile et/ou fixe et dont la tension assignée ne dépasse pas 1 500 V. Le présent document ne couvre pas les batteries d'aéronefs, couvertes par l'IEC 60952 (toutes les parties), et les batteries pour la propulsion des véhicules routiers électriques, couvertes par l'IEC 61982 (toutes les parties).

Visokotemperaturne sekundarne baterije - 2. del: Varnostne zahteve in preskusi

General Information

Status
Published
Publication Date
21-Jan-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-Jan-2021
Due Date
19-Mar-2021
Completion Date
22-Jan-2021

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SLOVENSKI STANDARD
SIST EN IEC 62984-2:2021
01-februar-2021
Visokotemperaturne sekundarne baterije - 2. del: Varnostne zahteve in preskusi
High Temperature secondary Batteries - Part 2: Safety requirements and tests

Batteries d'accumulateur à haute temperature - Partie 2: Prescriptions de sécurité et

essais
Ta slovenski standard je istoveten z: EN IEC 62984-2:2020
ICS:
29.220.20 Kislinski sekundarni členi in Acid secondary cells and
baterije batteries
SIST EN IEC 62984-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 62984-2:2021
---------------------- Page: 2 ----------------------
SIST EN IEC 62984-2:2021
EUROPEAN STANDARD EN IEC 62984-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 29.220.20
English Version
High-temperature secondary batteries - Part 2: Safety
requirements and tests
(IEC 62984-2:2020)

Batteries d'accumulateurs à haute température - Partie 2: Hochtemperatur-Sekundärbatterien - Teil 2:

Exigences de sécurité et essais Sicherheitsanforderungen und Prüfungen von Zellen und

(IEC 62984-2:2020) Batterien
(IEC 62984-2:2020)

This European Standard was approved by CENELEC on 2020-04-15. 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.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists 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,

Turkey and the United Kingdom.
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

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62984-2:2020 E
---------------------- Page: 3 ----------------------
SIST EN IEC 62984-2:2021
EN IEC 62984-2:2020 (E)
European foreword

The text of document 21/1032/FDIS, future edition 1 of IEC 62984-2, prepared by IEC/TC 21

"Secondary cells and batteries" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 62984-2:2020.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-01-15

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-04-15

document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 62984-2:2020 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60068-2-64 NOTE Harmonized as EN 60068-2-64
IEC 60068-2-75 NOTE Harmonized as EN 60068-2-75
IEC 60721-3-2 NOTE Harmonized as EN IEC 60721-3-2
IEC 60952 (series) NOTE Harmonized as EN 60952 (series)
IEC 61982 (series) NOTE Harmonized as EN 61982 (series)
IEC 62262 NOTE Harmonized as EN 62262
IEC 61373 NOTE Harmonized as EN 61373
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SIST EN IEC 62984-2:2021
EN IEC 62984-2:2020 (E)
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.cenelec.eu.
Publication Year Title EN/HD Year

IEC 60068-2-18 2017 Environmental testing - Part 2-18: Tests - EN 60068-2-18 2017

Test R and guidance: Water
IEC 60112 - Method for the determination of the proof and EN 60112 -
the comparative tracking indices of solid
insulating materials
IEC 60204-1 - Safety of machinery - Electrical equipment of EN 60204-1 -
machines - Part 1: General requirements
IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
IEC 60664-1 2007 Insulation coordination for equipment within EN 60664-1 2007
low-voltage systems - Part 1: Principles,
requirements and tests
IEC 61140 2016 Protection against electric shock - Common EN 61140 2016
aspects for installation and equipment
IEC 61508 series Functional safety of EN 61508 series
electrical/electronic/programmable electronic
safety-related systems
IEC 62984-1 2020 High-temperature secondary batteries - Part - -
1: General requirements
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SIST EN IEC 62984-2:2021
---------------------- Page: 6 ----------------------
SIST EN IEC 62984-2:2021
IEC 62984-2
Edition 1.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-temperature secondary batteries –
Part 2: Safety requirements and tests
Batteries d'accumulateurs à haute température –
Partie 2: Exigences de sécurité et essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20 ISBN 978-2-8322-7923-6

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN IEC 62984-2:2021
– 2 – IEC 62984-2:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms, definitions, symbols and abbreviated terms .......................................................... 6

3.1 Battery safety.......................................................................................................... 7

3.2 Symbols and abbreviated terms .............................................................................. 9

4 Environmental (service) conditions .................................................................................. 9

4.1 General ................................................................................................................... 9

4.2 Normal service conditions for stationary installations .............................................. 9

4.3 Special service conditions for stationary installations .............................................. 9

4.4 Normal service conditions for mobile installations (except propulsion)..................... 9

4.5 Special service conditions for mobile installations (except propulsion) .................... 9

5 Safety requirements ...................................................................................................... 10

5.1 Functional safety requirements ............................................................................. 10

5.1.1 Safety of battery management system ........................................................... 10

5.1.2 Battery protective management ..................................................................... 10

5.1.3 Thermal management .................................................................................... 10

5.2 Mechanical requirements ...................................................................................... 10

5.2.1 General ......................................................................................................... 10

5.2.2 Battery enclosure........................................................................................... 10

5.3 Protection against electrical shock ........................................................................ 10

5.3.1 General ......................................................................................................... 10

5.3.2 Normal conditions .......................................................................................... 11

5.3.3 Single-fault conditions ................................................................................... 11

5.3.4 Insulation voltage .......................................................................................... 12

5.3.5 Separation ..................................................................................................... 15

5.3.6 Spacing ......................................................................................................... 15

5.3.7 Earthing ......................................................................................................... 16

5.4 Resistance to abnormal conditions ........................................................................ 18

5.4.1 Resistance to overcharge .............................................................................. 18

5.4.2 Resistance to short circuit ............................................................................. 18

5.4.3 Resistance to external fire ............................................................................. 19

5.4.4 Resistance to internal overheating ................................................................. 19

5.4.5 Flooding ........................................................................................................ 19

5.4.6 Drop .............................................................................................................. 19

6 Safety tests ................................................................................................................... 20

6.1 General ................................................................................................................. 20

6.1.1 Classification of tests ..................................................................................... 20

6.1.2 Test object selection ...................................................................................... 20

6.1.3 DUT initial conditions before tests ................................................................. 20

6.1.4 Measuring equipment .................................................................................... 20

6.2 List of tests ........................................................................................................... 21

6.3 Type tests ............................................................................................................. 21

6.3.1 Overcharge test ............................................................................................. 21

6.3.2 Short circuit test ............................................................................................ 22

6.3.3 External fire exposure test ............................................................................. 22

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SIST EN IEC 62984-2:2021
IEC 62984-2:2020 © IEC 2020 – 3 –

6.3.4 Cell failure propagation test ........................................................................... 24

6.3.5 Overheating test ............................................................................................ 25

6.3.6 Drop test ....................................................................................................... 27

6.4 Routine tests......................................................................................................... 28

6.4.1 Withstand voltage test ................................................................................... 28

6.4.2 Insulation resistance measurement ................................................................ 29

6.5 Special tests ......................................................................................................... 30

6.5.1 Immersion test ............................................................................................... 30

7 Markings........................................................................................................................ 30

7.1 General ................................................................................................................. 30

7.2 Data plate marking ................................................................................................ 32

8 Rules for transportation, installation and maintenance ................................................... 32

8.1 Transportation ...................................................................................................... 32

8.2 Installation ............................................................................................................ 32

8.3 Maintenance ......................................................................................................... 32

9 Documentation .............................................................................................................. 32

9.1 Instruction manual ................................................................................................ 32

9.2 Test report ............................................................................................................ 32

Annex A (informative) Standard template for report of test results and description of

the DUT – Report of type test ............................................................................................... 33

Bibliography .......................................................................................................................... 36

Figure 1 – Examples of binding screw assemblies ................................................................ 18

Figure 2 – Fire exposure test: pre-heating ............................................................................ 23

Figure 3 – Fire exposure test: direct exposure ...................................................................... 24

Figure 4 – Fire exposure: end ............................................................................................... 24

Figure 5 – Plan view of specimen cross section for cell failure propagation test .................... 25

Figure 6 – Temperature management subsystem .................................................................. 26

Figure 7 – Application of test voltage .................................................................................... 29

Figure 8 – Insulation resistance measurement ...................................................................... 29

Figure 9 – Examples of safety labels for sodium-nickel-chloride / sodium-sulfur

batteries ............................................................................................................................... 31

Table 1 – List of symbols and abbreviated terms ..................................................................... 9

Table 2 – Withstand voltages ................................................................................................ 13

Table 3 – Actual test voltage for impulse test with corresponding altitudes ............................ 14

Table 4 – Guide to overvoltage category assignment ............................................................ 15

Table 5 – Multiplication factors for clearances of equipment rated for operation at

altitudes up to 5 000 m ......................................................................................................... 16

Table 6 – Type tests ............................................................................................................. 21

Table 7 – Routine tests ......................................................................................................... 21

Table 8 – Special tests ......................................................................................................... 21

Table 9 – Drop test severity classes ..................................................................................... 27

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SIST EN IEC 62984-2:2021
– 4 – IEC 62984-2:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-TEMPERATURE SECONDARY BATTERIES –
Part 2: Safety requirements and tests
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence between

any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62984-2 has been prepared by IEC technical committee 21:

Secondary cells and batteries.
The text of this International Standard is based on the following documents:
FDIS Report on voting
21/1032/FDIS 21/1042/RVD

Full information on the voting for the approval of this International Standard can be found in the

report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

This document is to be read in conjunction with IEC 62984-1:2020.

A list of all parts in the IEC 62984 series, published under the general title High-temperature

secondary batteries, can be found on the IEC website.
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SIST EN IEC 62984-2:2021
IEC 62984-2:2020 © IEC 2020 – 5 –

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct understanding

of its contents. Users should therefore print this document using a colour printer.

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SIST EN IEC 62984-2:2021
– 6 – IEC 62984-2:2020 © IEC 2020
HIGH-TEMPERATURE SECONDARY BATTERIES –
Part 2: Safety requirements and tests
1 Scope

This part of IEC 62984 specifies safety requirements and test procedures for high-temperature

batteries for mobile and/or stationary use and whose rated voltage does not exceed 1 500 V.

This document does not cover aircraft batteries, which are covered by IEC 60952 (all parts),

and batteries for the propulsion of electric road vehicles, covered by IEC 61982 (all parts).

NOTE High-temperature batteries are electrochemical systems whose cells' internal minimum operating

temperature is above 100 °C.
2 Normative references

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.

IEC 60068-2-18:2017, Environmental testing – Part 2-18: Tests – Test R and guidance: Water

IEC 60112, Method for the determination of the proof and the comparative tracking indices of

solid insulating materials

IEC 60204-1, Safety of machinery – Electrical equipment of machines – Part 1: General

requirements
IEC 60529, Degrees of protection provided by enclosures (IP Code)

IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:

Principles, requirements and tests

IEC 61140:2016, Protection against electric shock – Common aspects for installation and

equipment

IEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic

safety-related systems

IEC 62984-1:2020, High-temperature secondary batteries – Part 1: General requirements

3 Terms, definitions, symbols and abbreviated terms

For the purposes of this document, the terms and definitions given in IEC 62984-1 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
---------------------- Page: 12 ----------------------
SIST EN IEC 62984-2:2021
IEC 62984-2:2020 © IEC 2020 – 7 –
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Battery safety
3.1.1
rated insulation voltage

rated value of the RMS withstand voltage assigned by the manufacturer to the equipment or to

a part of it, characterizing the specified (long-term) withstand capability of its insulation

Note 1 to entry: The rated insulation voltage is not necessarily equal to the rated voltage of equipment which is

primarily related to functional performance.
[SOURCE: IEC 60050-312:2014, 312-06-02]
3.1.2
functional insulation

insulation between conductive parts, necessary for the proper functioning of the equipment

[SOURCE: IEC 60050-195:1998, 195-02-41]
3.1.3
supplementary insulation

independent insulation applied in addition to basic insulation in order to provide protection

against electric shock in the event of a failure of basic insulation

[SOURCE: IEC 60050-195:1998, 195-06-07, modified – "for fault protection" has been replaced

by "in order to provide protection against electric shock in the event of a failure of basic

insulation".]
3.1.4
reinforced insulation

insulation of hazardous-live-parts which provides a degree of protection against electric shock

equivalent to double insulation
[SOURCE: IEC 60050-195:1998, 195-06-09, modified – The note has been omitted.]
3.1.5
double insulation
insulation comprising both basic insulation and supplementary insulation

Note 1 to entry: Basic and supplementary insulation are separate, each designed for basic protection against

electric shock.

[SOURCE: IEC 60050-195:1998, 195-06-08, modified – The note to entry has been added.]

3.1.6
extra-low voltage
ELV

voltage not exceeding the maximum value of the prospective touch voltage which is permitted

to be maintained indefinitely under specified conditions of external influences
[SOURCE: IEC 61140:2016, 3.26]
3.1.7
SELV system

electric system in which the voltage cannot exceed the value of extra-low voltage:

– under normal conditions and
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SIST EN IEC 62984-2:2021
– 8 – IEC 62984-2:2020 © IEC 2020

– under single fault conditions, including earth faults in other electric circuits

Note 1 to entry: SELV is the abbreviation for safety extra low voltage.
[SOURCE: IEC 60050-826:2004, 826-12-31]
3.1.8
PELV system

electric system in which the voltage cannot exceed the value of extra-low voltage:

– under normal conditions and
– under single fault conditions, except earth faults in other electric circuits
Note 1 to entry: PELV is the abbreviation for protective extra low voltage.
[SOURCE: IEC 60050-826:2004, 826-12-32]
3.1.9
protective-equipotential-bonding
PEB
equipotential bonding for the purposes of safety
EXAMPLE Protection against electric shock is an example of a safety purpose.
Note 1 to entry: Functional-equipotential-bonding is defined in IEV 195-01-16.
Note 2 to entry: This note applies to the French language only.

[SOURCE: IEC 60050-195:1998, 195-01-15, modified – Added abbreviated term, example and

notes.]
3.1.10
class I equipment

equipment with basic insulation as provision for basic protection against electric shock and

protective bonding as provision for fault protection, such that conductive parts on the outside

of the equipment case cannot become live in the event of a failure of the basic insulation

Note 1 to entry: Content based on IEC 60050-851:2008, 851-15-10.
3.1.11
class II equipment

equipment with basic insulation as provision for basic protection against electric shock, and

supplementary insulation as provision for fault protection, or in which basic protection and fault

protection are provided by reinforced insulation

Note 1 to entry: There should be no provision for a protective conductor or reliance upon installation conditions for

safety purposes. It is, however, possible to connect an earth conductor to Class II equipment for functional (for

example, EMC) purposes.
Note 2 to entry: Content based on IEC 60050-851:2008, 851-15-11.
3.1.12
class III equipment

equipment, or parts of equipment, in which protection against electric shock relies upon supply

from SELV or PELV systems and in which hazardous voltages (see hazardous-live-part) are not

generated
3.1.13
overvoltage category
number defining a transient overvoltage condition
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SIST EN IEC 62984-2:2021
IEC 62984-2:2020 © IEC 2020 – 9 –
Note 1 to entry: Overvoltage categories I, II, III are used.
Note 2 to entry: See 5.3.4 for overvoltage category details.
[SOURCE: IEC 60050-581:2008, 581-21-02, modified – Added notes to entry.]
3.1.14
hazardous-live-part
live part which, under certain conditions, can give a harmful electric shock
[SOURCE: IEC 60050-195:1998, 195-06-05]
3.2 Symbols and abbreviated terms
The list of symbols and abbreviated terms is given in Table 1.
Table 1 – Li
...

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