EN IEC 61960-4:2024

Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium cells and batteries for portable applications - Part 4: Coin secondary lithium cells, and batteries made from them

IEC 61960-4:2024 specifies performance tests, designations, markings, dimensions and other requirements for coin secondary lithium cells and batteries for portable applications, watches, and backup power supply such as memory backup applications. In particular, watch‑specific requirements are specified in Annex A. This document provides purchasers and users of coin secondary lithium cells and batteries with a set of criteria with which they can assess the performance of coin secondary lithium cells and batteries offered by various manufacturers. This document defines a minimum required level of performance and a standardized methodology by which testing is performed and the results of this testing are reported to the user. This document covers coin secondary lithium cells and batteries with a range of chemistries. Each electrochemical couple has a characteristic voltage range over which, during discharge, it releases its electrical capacity, a characteristic nominal voltage and a characteristic end‑of‑discharge voltage. Users of coin secondary lithium cells and batteries are requested to consult the manufacturer for advice. This document also provides guidelines for designers of equipment using lithium batteries (voir l'Annexe B).

Sekundärzellen und -batterien mit alkalischen oder anderen nicht-säurehaltigen Elektrolyten - Sekundäre Lithiumzellen und -batterien für tragbare Anwendungen - Teil 4: Sekundäre Lithium-Knopfzellen und daraus hergestellte Batterien

Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Accumulateurs au lithium pour applications portables - Partie 4: Éléments et batteries d’accumulateurs boutons au lithium

L'IEC 61960-4:2024 spécifie les essais de performance, les désignations, les marquages, les dimensions et autres exigences pour les éléments et batteries d'accumulateurs boutons au lithium destinés aux montres, aux applications portables et d'alimentation de secours telles que les applications de sauvegarde de mémoire. Les exigences propres aux montres, en particulier, sont spécifiées dans l'Annexe A. Le présent document fournit aux acheteurs et aux utilisateurs d'éléments et batteries d'accumulateurs boutons au lithium un ensemble de critères au moyen desquels ils peuvent évaluer les performances des différents accumulateurs de ce type proposés par différents fabricants. Le présent document définit un niveau d'exigence minimale de performance et une méthodologie normalisée par laquelle sont réalisés les essais dont les résultats sont mis à la disposition de l'utilisateur. Les utilisateurs sont alors en mesure d'apprécier par eux-mêmes la viabilité des accumulateurs disponibles dans le commerce au moyen de la spécification déclarée et donc de sélectionner l'élément ou la batterie le ou la mieux adaptée à l'application prévue. Le présent document couvre les éléments et batteries d'accumulateurs boutons au lithium dans une large gamme de compositions chimiques. Chaque couple électrochimique possède une plage de tension caractéristique dans laquelle il restitue, en décharge, sa capacité emmagasinée, une tension nominale caractéristique et une tension de fin de décharge caractéristique. Il est demandé aux utilisateurs d'éléments et batteries d'accumulateurs boutons au lithium de prendre conseil auprès du fabricant. Le présent document fournit également des lignes directrices pour les concepteurs d'équipements utilisant des batteries au lithium (voir l'Annexe B).

Sekundarni členi in baterije, ki vsebujejo alkalne ali druge nekislinske elektrolite - Sekundarni litijevi členi in baterije za prenosne naprave - 4. del: Gumbni litijevi sekundarni členi in baterije, izdelane iz njih

General Information

• Status: Published
• Publication Date: 12-Sep-2024
• ICS: 29.220.99 - Other cells and batteries
• Technical Committee: CLC/TC 21X - Secondary cells and batteries
• Drafting Committee: IEC/SC 21A - IEC_SC_21A
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 13-Sep-2024
• Due Date: 31-May-2024
• Completion Date: 13-Sep-2024
• Ref Project: SIST EN IEC 61960-4:2024 - Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium cells and batteries for portable applications - Part 4: Coin secondary lithium cells, and batteries made from them

Relations

• Replaces: EN IEC 61960-4:2020 - Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium cells and batteries for portable applications - Part 4: Coin secondary lithium cells, and batteries made from them
• Effective Date: 28-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2024
Sekundarni členi in baterije, ki vsebujejo alkalne ali druge nekislinske elektrolite -
Sekundarni litijevi členi in baterije za prenosne naprave - 4. del: Gumbni litijevi
sekundarni členi in baterije, izdelane iz njih
Secondary cells and batteries containing alkaline or other non-acid electrolytes -
Secondary lithium cells and batteries for portable applications - Part 4: Coin secondary
lithium cells, and batteries made from them
Sekundärzellen und -batterien mit alkalischen oder anderen nicht-säurehaltigen
Elektrolyten - Sekundäre Lithiumzellen und -batterien für tragbare Anwendungen - Teil 4:
Sekundäre Lithium-Knopfzellen und daraus hergestellte Batterien
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Accumulateurs
au lithium pour applications portables - Partie 4: Éléments et batteries daccumulateurs
boutons au lithium
Ta slovenski standard je istoveten z: EN IEC 61960-4:2024
ICS:
29.220.30 Alkalni sekundarni členi in Alkaline secondary cells and
baterije batteries
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61960-4

NORME EUROPÉENNE
EUROPÄISCHE NORM September 2024
ICS 29.220.99 Supersedes EN IEC 61960-4:2020
English Version
Secondary cells and batteries containing alkaline or other non-
acid electrolytes - Secondary lithium cells and batteries for
portable applications - Part 4: Coin secondary lithium cells, and
batteries made from them
(IEC 61960-4:2024)
Accumulateurs alcalins et autres accumulateurs à Sekundärzellen und -batterien mit alkalischen oder anderen
électrolyte non acide - Accumulateurs au lithium pour nicht-säurehaltigen Elektrolyten - Sekundäre Lithiumzellen
applications portables - Partie 4: Éléments et batteries und -batterien für tragbare Anwendungen - Teil 4:
d'accumulateurs boutons au lithium Sekundäre Lithium-Knopfzellen und daraus hergestellte
(IEC 61960-4:2024) Batterien
(IEC 61960-4:2024)
This European Standard was approved by CENELEC on 2024-09-03. 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,
Türkiye 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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61960-4:2024 E

European foreword
The text of document 21A/880/FDIS, future edition 2 of IEC 61960-4, prepared by SC 21A "Secondary
cells and batteries containing alkaline or other non-acid electrolytes" of IEC/TC 21 "Secondary cells
and batteries" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-06-03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-09-03
document have to be withdrawn
This document supersedes EN IEC 61960-4:2020 and all of its amendments and corrigenda (if any).
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61960-4:2024 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 standard indicated:
IEC 60051 series NOTE Approved as EN IEC 60051 series
IEC 60086-1 NOTE Approved as EN IEC 60086-1
IEC 60086-2 NOTE Approved as EN IEC 60086-2
IEC 60086-3:2021 NOTE Approved as EN IEC 60086-3:2021 (not modified)
IEC 61434 NOTE Approved as EN 61434
IEC 61959 NOTE Approved as EN 61959
IEC 61960-3 NOTE Approved as EN 61960-3
IEC 62281 NOTE Approved as EN IEC 62281
IEC 62368-1 NOTE Approved as EN IEC 62368-1
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 60050-482 - International Electrotechnical Vocabulary - - -
Part 482: Primary and secondary cells and
batteries
IEC 60086-4 2019 Primary batteries - Part 4: Safety of lithium EN IEC 60086-4 2019
batteries
IEC 62133-2 2017 Secondary cells and batteries containing EN 62133-2 2017
alkaline or other non-acid electrolytes -
Safety requirements for portable sealed
secondary lithium cells, and for batteries
made from them, for use in portable
applications - Part 2: Lithium systems
+ AMD1 2021 + A1 2021
IEC 61960-4 ®
Edition 2.0 2024-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary cells and batteries containing alkaline or other non-acid

electrolytes – Secondary lithium cells and batteries for portable applications –

Part 4: Coin secondary lithium cells, and batteries made from them

Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –

Accumulateurs au lithium pour applications portables –

Partie 4: Éléments et batteries d’accumulateurs boutons au lithium

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.99  ISBN 978-2-8322-9196-2

– 2 – IEC 61960-4:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Parameter measurement tolerances . 8
5 Cell designation and marking . 8
5.1 Cell designation . 8
5.2 Marking . 10
5.2.1 General . 10
5.2.2 Swallowable cells or batteries . 10
6 Electrical tests . 11
6.1 General . 11
6.2 Charging procedure for test purposes . 12
6.3 Discharge performance . 12
6.4 Charge (capacity) recovery after long-term storage . 13
6.5 Endurance in cycles . 13
6.6 Cell or battery internal resistance (AC resistance) . 14
6.6.1 General . 14
6.6.2 Test – General . 14
6.6.3 Measurement . 14
6.6.4 Acceptance criterion . 15
7 Differentiation . 15
Annex A (normative) Requirements for secondary lithium watch batteries . 16
A.1 General . 16
A.2 Physical requirements . 16
A.2.1 Symbols and shape of cell . 16
A.2.2 Dimensions and size codes . 16
A.3 Test methods for determining the resistance to leakage . 17
A.3.1 Preconditioning and initial visual examination . 17
A.3.2 High temperature and humidity test . 17
A.3.3 Test by temperature cycle . 18
A.4 Visual examination and acceptance criteria . 18
A.4.1 Preconditioning . 18
A.4.2 Magnification . 18
A.4.3 Leakage levels and classification . 18
A.4.4 Acceptance conditions . 19
Annex B (informative) Guidelines for designers of equipment using lithium batteries . 20
Bibliography . 21

Figure 1 – Dimensional characteristics . 9
Figure 2 – Sample sizes and sequence of tests . 11
Figure A.1 – Dimensional drawing . 16
Figure A.2 – Test by temperature cycles . 18

Table 1 – Electrochemical systems in current practical use . 9

IEC 61960-4:2024 © IEC 2024 – 3 –
Table 2 – Examples of generally used upper limit charge voltage . 12
Table 3 – Example of generally used lower limit of end-of-discharge voltage . 13
Table 4 – Minimum number of cycles . 14
Table A.1 – Dimensions and size codes for watch batteries . 17
Table A.2 – Storage conditions . 17
Table B.1 – Equipment design guidelines . 20

– 4 – IEC 61960-4:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SECONDARY CELLS AND BATTERIES CONTAINING ALKALINE OR
OTHER NON-ACID ELECTROLYTES – SECONDARY LITHIUM CELLS
AND BATTERIES FOR PORTABLE APPLICATIONS –

Part 4: Coin secondary lithium cells, and batteries made from them

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organizatio
...