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

IEC 61960-4:2020 specifies performance tests, designations, markings, dimensions and other requirements for coin secondary lithium cells and batteries for portable applications and backup power supply such as memory backup applications.
The objective of this document is to provide the 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 reported to the user. Hence, users will be able to establish the viability of commercially available cells and batteries via the declared specification and thus be able to select the cell or battery best suited for their intended application.
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.

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 61960-4:2020 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 applications portables et d'alimentation de secours telles que les applications de sauvegarde de mémoire.
L'objectif du présent document est de fournir aux acheteurs et aux utilisateurs d'éléments et batteries d'accumulateurs boutons au lithium un ensemble de critères au moyen desquels ils peuvent évaluer la performance 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 adapté(e) à l'application prévue.
Le présent document concerne les éléments et batteries d'accumulateurs boutons au lithium dans une large gamme de couples électrochimiques. 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.

General Information

• Status: Published
• Publication Date: 19-Apr-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.220.99 - Other cells and batteries
• Technical Committee: SC 21A - Secondary cells and batteries containing alkaline or other non-acid electrolytes
• Drafting Committee: WG 3 - TC 21/SC 21A/WG 3

Relations

• Replaces: IEC 61960:2011 - Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium cells and batteries for portable applications
• Effective Date: 05-Sep-2023
• Revised: 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61960-4 ®
Edition 1.0 2020-04
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

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IEC 61960-4 ®
Edition 1.0 2020-04
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 978-2-8322-8069-0

– 2 – IEC 61960-4:2020 © IEC 2020
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Parameter measurement tolerances . 7
5 Cell designation and marking . 7
5.1 Cell designation . 7
5.2 Marking . 9
5.2.1 General . 9
5.2.2 Small cells or batteries . 9
6 Electrical tests . 9
6.1 General . 9
6.2 Charging procedure for test purposes . 10
6.3 Discharge performance . 11
6.4 Charge (capacity) recovery after long-term storage . 12
6.5 Endurance in cycles . 12
6.6 Cell or battery internal resistance (AC resistance) . 13
6.6.1 General . 13
6.6.2 Test – General . 13
6.6.3 Measurement . 13
6.6.4 Acceptance criterion . 14
7 Differentiation . 14
Annex A (informative) Guidelines for designers of equipment using lithium batteries . 15
Bibliography . 16

Figure 1 – Dimensional characteristics . 8
Figure 2 – Sample sizes and sequence of tests . 10

Table 1 – Electrochemical systems in current practical use . 8
Table 2 – Examples of recommended upper limit charge voltage . 11
Table 3 – Recommended end-of-discharge voltage limit . 11
Table 4 – Minimum number of cycles . 13
Table A.1 – Equipment design guidelines . 15

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
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International Standard IEC 61960-4 has been prepared by subcommittee 21A: Secondary cells
and batteries containing alkaline or other non-acid electrolytes, of IEC technical committee 21:
Secondary cells and batteries.
The text of this International Standard is based on the following documents:
FDIS Report on voting
21A/725/FDIS 21A/726/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.

– 4 – IEC 61960-4:2020 © IEC 2020
A list of all parts in the IEC 61960 series, published under the general title Secondary cells and
batteries containing alkaline or other non-acid electrolytes – Secondary lithium cells and
batteries for portable applications, can be found on the IEC website.
The commit
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