EN 61951-1:2017

SLOVENSKI STANDARD
01-maj-2018
1DGRPHãþD
SIST EN 61951-1:2014
6HNXQGDUQLþOHQLLQEDWHULMH]DONDOQLPLDOLGUXJLPLQHNLVOLQVNLPLHOHNWUROLWL
6HNXQGDUQLKHUPHWLþQLþOHQLLQEDWHULMH]DSUHQRVQHQDSUDYHGHO1LNHOMNDGPLM
Secondary cells and batteries containing alkaline or other non-acid electrolytes -
Secondary sealed cells and batteries for portable applications - Part 1: Nickel cadmium
Akkumulatoren und Batterien mit alkalischen oder anderen nichtsäurehaltigen
Elektrolyten - Tragbare wiederaufladbare gasdichte Einzelzellen - Teil 1: Nickel-
Cadmium
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Accumulateurs
étanches pour applications portables - Partie 1: Nickel cadmium
Ta slovenski standard je istoveten z: EN 61951-1:2017
ICS:
29.220.30 $ONDOQLVHNXQGDUQLþOHQLLQ Alkaline secondary cells and
EDWHULMH batteries
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61951-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2017
ICS 29.220.30 Supersedes EN 61951-1:2014
English Version
Secondary cells and batteries containing alkaline or other non-
acid electrolytes - Secondary sealed cells and batteries for
portable applications - Part 1: Nickel-cadmium
(IEC 61951-1:2017)
Accumulateurs alcalins et autres accumulateurs à Akkumulatoren und Batterien mit alkalischen oder anderen
électrolyte non acide - Accumulateurs étanches pour nichtsäurehaltigen Elektrolyten - Tragbare wiederaufladbare
applications portables - Partie 1: Nickel-cadmium gasdichte Einzelzellen - Teil 1: Nickel-Cadmium
(IEC 61951-1:2017) (IEC 61951-1:2017)
This European Standard was approved by CENELEC on 2017-04-11. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61951-1:2017 E
European foreword
The text of document 21A/622/FDIS, future edition 4 of IEC 61951-1, 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 (dop) 2018-01-11
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2020-04-11
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61951-1:2014.

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 61951-1:2017 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 60051 Series NOTE Harmonized as EN 60051 Series.
IEC 60086 Series NOTE Harmonized as EN 60086 Series.
IEC 61434 NOTE Harmonized as EN 61434.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When 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 60050-482 2004 International Electrotechnical Vocabulary - -
(IEV) -
Part 482: Primary and secondary cells and
batteries
IEC 60086-1 -  Primary batteries - EN 60086-1 -
Part 1: General
IEC 60086-2 -  Primary batteries - EN 60086-2 -
Part 2: Physical and electrical
specifications
IEC 61959 -  Secondary cells and batteries containing EN 61959 -
alkaline or other non-acid electrolytes -
Mechanical tests for sealed portable
secondary cells and batteries
IEC 62133-1 -  Secondary cells and batteries containing EN 62133-1 -
alkaline or other non-acid electrolytes -
Safety requirements for portable sealed
secondary cells, and for batteries made
from them, for use in portable applications
- Part 1: Nickel systems
IEC 61951-1 ®
Edition 4.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary cells and batteries containing alkaline or other non-acid

electrolytes – Secondary sealed cells and batteries for portable applications –

Part 1: Nickel-cadmium
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –

Accumulateurs étanches pour applications portables –

Partie 1: Nickel-cadmium
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.30 ISBN 978-2-8322-4010-6

– 2 – IEC 61951-1:2017 © IEC 2017
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Parameter measurement tolerances . 9
5 Cell and battery designation and marking . 9
5.1 Cell and battery designation . 9
5.1.1 Small prismatic cells and cylindrical cells . 9
5.1.2 Button cells. 11
5.1.3 Batteries . 11
5.2 Cell or battery termination . 11
5.3 Marking . 11
5.3.1 Small prismatic cells and cylindrical cells . 11
5.3.2 Button cells. 12
5.3.3 Batteries . 12
5.4 Exemption of wording. 12
6 Dimensions. 12
6.1 Small prismatic cells and cylindrical cells . 12
6.1.1 General . 12
6.1.2 Small prismatic cells . 13
6.1.3 Cylindrical cells . 13
6.2 Button cells . 15
7 Electrical tests . 16
7.1 General . 16
7.2 Charging procedure for test purposes . 16
7.2.1 Charging procedure for cell. 16
7.2.2 Charging procedure for battery . 16
7.3 Discharge performance . 17
7.3.1 General . 17
7.3.2 Discharge performance at 20 °C . 17
7.3.3 Discharge performance at –18 °C . 19
7.3.4 Discharge performance for rapid charge cells (R cells) . 20
7.4 Charge (capacity) retention . 20
7.5 Endurance . 20
7.5.1 Endurance in cycles. 20
7.5.2 Permanent charge endurance . 24
7.6 Charge acceptance at constant voltage . 28
7.7 Overcharge . 28
7.7.1 Small prismatic cells . 28
7.7.2 L, M, H or X cylindrical and button cells . 29
7.7.3 LT/LU, MT/MU or HT/HU cylindrical cells . 29
7.7.4 J cylindrical cells . 29
7.7.5 JT cylindrical cells . 30
7.7.6 R cylindrical cells . 30
7.8 Safety device operation . 31

IEC 61951-1:2017 © IEC 2017 – 3 –
7.9 Button cells or batteries storage, small prismatic cells or batteries storage,
cylindrical cells or batteries storage . 31
7.10 Charge acceptance at +55 °C for LT, MT or HT cylindrical cells . 32
7.11 Trickle charge acceptance for JT cylindrical cells . 32
7.12 Internal resistance . 33
7.12.1 General . 33
7.12.2 Measurement of the internal AC resistance . 33
7.12.3 Measurement of the internal DC resistance . 34
8 Mechanical tests . 34
9 Safety requirements . 34
10 Type approval and batch acceptance . 34
10.1 General . 34
10.2 Type approval . 35
10.2.1 Type approval for small prismatic cells . 35
10.2.2 Type approval for cylindrical and button cells .
...