EN 61951-2:2011

Secondary cells and batteries containing alkaline or other non-acid electrolytes - Portable sealed rechargeable single cells - Part 2: Nickel-metal hydride

IEC 61951-2:2011 specifies marking, designation, dimensions, tests and requirements for portable sealed nickel-metal hydride, small prismatic, cylindrical and button rechargeable single cells, suitable for use in any orientation. This third edition cancels and replaces the second edition published in 2003 of which it constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - clause 4: addition of 2 parameters; - clause 5: addition of cells type 'S' and cells type 'T'; - subclause 6.1.2: addition of new cylindrical cells; - subclause 7.8: addition of a specific test for 'S' cells.

Akkumulatoren und Batterien mit alkalischem oder anderen nichtsäurehaltigen Elektrolyten - Tragbare wiederaufladbare gasdichte Einzelzellen - Teil 2: Nickel-Metallhydrid

Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Accumulateurs individuels portables étanches - Partie 2: Nickel-métal hydrure

La CEI 61951-2:2011 spécifie le marquage, la désignation, les dimensions, les essais et les exigences applicables aux petits éléments parallélépipédiques, aux éléments cylindriques et aux éléments boutons, individuels, portables, rechargeables, étanches, au nickel-métal hydrure, pouvant être utilisés dans toutes les orientations. Cette troisième édition annule et remplace la deuxième édition parue en 2003, dont elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - article 4: ajout de 2 paramètres; - article 5: ajout d'éléments type 'S' et éléments type 'T'; - paragraphe 6.1.2: ajout de nouveaux éléments cylindriques; - paragraphe 7.8: ajout d'un essai spécifique pour les éléments 'S'.

Sekundarne celice in baterije, ki vsebujejo alkalne ali druge nekislinske elektrolite - Prenosne posamezne ponovno polnljive hermetične celice - 2. del: Nikelj-kovinski hidrid

Ta del IEC 61951 določa označevanje, oznake, mere, preskuse in zahteve za prenosne hermetične nikelj-kovinske hidride, majhne prizmatske, cilindrične in ponovno polnljive posamezne gumb-člene, primerne za uporabo v vseh smereh.

General Information

• Status: Withdrawn
• Publication Date: 14-Jul-2011
• Withdrawal Date: 28-Jun-2014
• ICS: 29.220.30 - Alkaline secondary cells and batteries
• Technical Committee: CLC/TC 21X - Secondary cells and batteries
• Drafting Committee: IEC/SC 21A - IEC_SC_21A
• Parallel Committee: IEC/SC 21A - IEC_SC_21A
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 26-Apr-2020
• Completion Date: 26-Apr-2020
• Ref Project: SIST EN 61951-2:2011 - Secondary cells and batteries containing alkaline or other non-acid electrolytes - Portable sealed rechargeable single cells - Part 2: Nickel-metal hydride

Relations

• Replaces: EN 61951-2:2003 - Secondary cells and batteries containing alkaline or other non-acid electrolytes - Portable sealed rechargeable single cells - Part 2: Nickel-metal hydride
• Effective Date: 29-Jan-2023
• Replaced By: EN 61951-2:2017 - Secondary cells and batteries containing alkaline or other non acid electrolytes - Secondary sealed cells and batteries for portable applications - Part 2: Nickel-metal hydride
• Effective Date: 05-May-2015

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2011
6HNXQGDUQHFHOLFHLQEDWHULMHNLYVHEXMHMRDONDOQHDOLGUXJHQHNLVOLQVNHHOHNWUROLWH
3UHQRVQHSRVDPH]QHSRQRYQRSROQOMLYHKHUPHWLþQHFHOLFHGHO1LNHOM
NRYLQVNLKLGULG
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Portable
sealed rechargeable single cells - Part 2: Nickel-metal hydride
Akkumulatoren und Batterien mit alkalischem oder anderen nichtsäurehaltigen
Elektrolyten - Tragbare wiederaufladbare gasdichte Einzelzellen - Teil 2: Nickel-
Metallhydrid
Accumulateurs alcalins et autres accumulateurs à électrolyte non-acide - Accumulateurs
individuels portables étanches - Partie 2: Nickel-métal hydrure
Ta slovenski standard je istoveten z: EN 61951-2:2011
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 61951-2
NORME EUROPÉENNE
July 2011
EUROPÄISCHE NORM
ICS 29.220.30 Supersedes EN 61951-2:2003

English version
Secondary cells and batteries containing alkaline or other non-acid
electrolytes -
Portable sealed rechargeable single cells -
Part 2: Nickel-metal hydride
(IEC 61951-2:2011)
Accumulateurs alcalins et autres Akkumulatoren und Batterien mit
accumulateurs à électrolyte non acide - alkalischem oder anderen
Accumulateurs individuels portables nichtsäurehaltigen Elektrolyten -
étanches - Tragbare wiederaufladbare gasdichte
Partie 2: Nickel-métal hydrure Einzelzellen -
(CEI 61951-2:2011) Teil 2: Nickel-Metallhydrid
(IEC 61951-2:2011)
This European Standard was approved by CENELEC on 2011-06-29. 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 Central Secretariat 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 Central Secretariat 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61951-2:2011 E
Foreword
The text of document 21A/484/FDIS, future edition 3 of IEC 61951-2, 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 was approved by CENELEC as
EN 61951-2 on 2011-06-29.
This European Standard supersedes EN 61951-2:2003.
— Clause 4: addition of 2 parameters;
— Clause 5: addition of cells type “S” and cells type “T”;
— Subclause 6.1.2: addition of new cylindrical cells;
— Subclause 7.8: addition of a specific test for “S” cells.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-03-29
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-06-29
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61951-2:2011 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 in EN 60051 series.
IEC 61434 NOTE  Harmonized as EN 61434.
__________
- 3 - EN 61951-2:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60050-482 - International Electrotechnical Vocabulary - - -
Part 482: Primary and secondary cells and
batteries
IEC 60086 Series Primary batteries EN 60086 Series

1)
IEC 60086-1 2006 Primary batteries - EN 60086-1 2007
Part 1: General
2)
IEC 60086-2 2006 Primary batteries - EN 60086-2 2007
Part 2: Physical and electrical specifications

IEC 60410 - Sampling plans and procedures - -
for inspection by attributes
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 - Secondary cells and batteries containing EN 62133 -
alkaline or other non-acid electrolytes -
Safety requirements for portable sealed
secondary cells, and for batteries made from
them, for use in portable applications

1)
EN 60086-1 is superseded by EN 60086-1:2011, which is based on IEC 60086-1:2011.
2)
EN 60086-2 is superseded by EN 60086-2:2011, which is based on IEC 60086-2:2011.

IEC 61951-2 ®
Edition 3.0 2011-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary cells and batteries containing alkaline or other non-acid
electrolytes – Portable sealed rechargeable single cells –
Part 2: Nickel-metal hydride
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –
Accumulateurs individuels portables étanches –
Partie 2: Nickel-métal hydrure

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29.220.30 ISBN 978-2-88912-497-8

– 2 – 61951-2 © IEC:2011
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Parameter measurement tolerances . 7
5 Cell designation and marking. 8
5.1 Cell designation . 8
5.1.1 Small prismatic cells and cylindrical cells . 8
5.1.2 Button cells . 9
5.2 Cell termination . 9
5.3 Marking . 9
5.3.1 Small prismatic cells and cylindrical cells . 9
5.3.2 Button cells . 10
6 Dimensions . 10
6.1 Small prismatic cells and cylindrical cells . 10
6.1.1 General . 10
6.1.2 Small prismatic cells . 11
6.1.3 Cylindrical cells . 12
6.2 Button cells . 14
7 Electrical tests . 14
7.1 General . 14
7.2 Charging procedure for test purposes . 14
7.3 Discharge performance . 15
7.3.1 General . 15
7.3.2 Discharge performance at 20 °C . 15
7.3.3 Discharge performance at 0 °C . 15
7.3.4 Discharge performance for rapid charge cells (R cells) . 16
7.4 Charge (capacity) retention . 16
7.5 Endurance . 17
7.5.1 Endurance in cycles . 17
7.5.2 Permanent charge endurance . 19
7.6 Charge acceptance at constant voltage . 23
7.7 Overcharge . 23
7.7.1 Small prismatic, L, M, H, X, LS or MS cylindrical, and button cells . 23
7.7.2 LT/LU, MT/MU or HT/HU cylindrical cells . 23
7.7.3 R cylindrical cells. 23
7.8 Safety device operation . 24
7.9 Surface temperature limitation device operation (for S cell only) . 24
7.10 Storage . 25
7.11 Charge acceptance at +55 °C for LT, MT or HT cylindrical cells . 25
7.12 Internal resistance . 26
7.12.1 General . 26
7.12.2 Measurement of the internal a.c. resistance . 26
7.12.3 Measurement of the internal d.c. resistance . 27
8 Mechanical tests. 27

61951-2 © IEC:2011 – 3 –
9 Safety requirements . 27
10 Type approval and batch acceptance. 27
10.1 Type approval . 27
10.1.1 Type approval for small prismatic cells and button cells . 27
10.1.2 Type approval for cylindrical cells . 28
10.2 Batch acceptance . 29
Bibliography . 31

Figure 1 – Jacketed cylindrical cells . 11
Figure 2 – Jacketed small prismatic cells . 11
Figure 3 – Jacketed cells dimensionally interchangeable with primary cells . 12
Figure 4 – Button cells . 14

Table 1 – Dimensions of jacketed small prismatic cells . 11
Table 2 – Jacketed cylindrical cells dimensionally interchangeable with primary cells . 12
Table 3 – Jacketed cylindrical cells not dimensionally interchangeable with primary
cells .
...