IEC 62675:2014

IEC 62675
®

Edition 1.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Secondary cells and batteries containing alkaline or other non-acid
electrolytes – Sealed nickel-metal hydride prismatic rechargeable single cells

Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –
Éléments individuels parallélépipédiques rechargeables étanches au nickel-
métal hydrure
IEC 62675:2014-08(en-fr)

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2014 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.


Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch

About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.


A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.


Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
Plus de 55 000 entrées terminologiques électrotechniques, en
La recherche avancée permet de trouver des publications IEC
en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et
comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus
projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des

CE 37, 77, 86 et CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
csc@iec.ch.

---------------------- Page: 2 ----------------------
IEC 62675

®


Edition 1.0 2014-08




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Secondary cells and batteries containing alkaline or other non-acid

electrolytes – Sealed nickel-metal hydride prismatic rechargeable single cells




Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –

Éléments individuels parallélépipédiques rechargeables étanches au nickel-

métal hydrure















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX Q



ICS 29.220.99 ISBN 978-2-8322-1845-7



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: 3 ----------------------
– 2 – IEC 62675:2014  IEC 2014
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Parameter measurement tolerances . 7
5 Designation and marking . 7
5.1 Cell designation . 7
5.2 Cell termination . 8
5.3 Marking . 8
5.4 Safety recommendations . 8
6 Dimensions. 8
7 Electrical tests . 10
7.1 General . 10
7.2 Charging procedure for test purposes . 10
7.3 Discharge performance . 10
7.3.1 General . 10
7.3.2 Discharge performance at 20 °C . 10
7.3.3 Discharge performance at +5 °C . 11
7.3.4 Discharge performance at –18 °C . 11
7.3.5 High rate current test . 12
7.4 Charge retention . 12
7.5 Endurance . 13
7.5.1 Endurance in cycles. 13
7.5.2 Permanent charge endurance . 13
7.6 Charge acceptance at constant voltage . 14
7.7 Overcharge . 14
7.8 Vent plug operation . 14
7.9 Safety device operation . 14
7.10 Gas leakage test . 15
7.11 Storage . 15
8 Mechanical tests . 15
9 Physical appearance . 15
10 Conditions for approval and acceptance . 15
10.1 Type approval . 15
10.2 Batch acceptance . 16
Bibliography . 17

Figure 1 – Example of a sealed prismatic cell in steel container with two terminals and
four lugs . 8
Figure 2 – Example of a sealed prismatic cell in plastic container with two terminals . 9

Table 1 – Dimensions for sealed nickel-metal hydride prismatic cells in steel
containers . 9
Table 2 – Dimensions for sealed nickel-metal hydride prismatic cells in plastic
containers . 9

---------------------- Page: 4 ----------------------
IEC 62675:2014  IEC 2014 – 3 –
Table 3 – Measurement tolerances in millimetres (valid for widths and lengths) . 10
Table 4 – Discharge performance at 20 °C . 11
Table 5 – Discharge performance at +5 °C . 11
Table 6 – Discharge performance at –18 °C . 12
Table 7 – High currents values. 12
Table 8 – Endurance in cycles . 13
Table 9 – Sequence of tests for type approval . 16
Table 10 – Recommended test sequence for batch acceptance . 16

---------------------- Page: 5 ----------------------
– 4 – IEC 62675:2014  IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SECONDARY CELLS AND BATTERIES CONTAINING
ALKALINE OR OTHER NON-ACID ELECTROLYTES –
SEALED NICKEL-METAL HYDRIDE PRISMATIC
RECHARGEABLE SINGLE CELLS

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 62675 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 standard is based on the following documents:
FDIS Report on voting
21A/550/FDIS 21A/560/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 6 ----------------------
IEC 62675:2014  IEC 2014 – 5 –
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

---------------------- Page: 7 ----------------------
– 6 – IEC 62675:2014  IEC 2014
SECONDARY CELLS AND BATTERIES CONTAINING
ALKALINE OR OTHER NON-ACID ELECTROLYTES –
SEALED NICKEL-METAL HYDRIDE PRISMATIC
RECHARGEABLE SINGLE CELLS



1 Scope
This International Standard specifies marking, designation, dimensions, tests and
requirements for sealed nickel-metal hydride prismatic secondary single cells.
NOTE In this context, "prismatic" refers to cells having rectangular sides and base.
When there exists an IEC standard specifying test conditions and requirements for cells used
in special applications and which is in conflict with this standard, the former takes precedence.
2 Normative references
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.
IEC 60050-482:2004, International Electrotechnical Vocabulary (IEV) – Part 482: Primary and
secondary cells and batteries
3 Terms and definitions
For the purposes of this document, the terms and definitions given in the IEC 60050-482, as
well as the following apply.
3.1
sealed cell
cell which remains closed and does not release either gas or liquid when operated within the
limits of charge and temperature specified by the manufacturer
Note 1 to entry: The cell is equipped with a safety device to prevent dangerously high internal pressure.
Note 2 to entry: The cell does not require addition to the electrolyte and is designed to operate during its life in its
original sealed state.
Note 3 to entry: The nickel-metal hydride cell, however, may release gas towards the end of its life due to the
accumulation of hydrogen in the cell.
[SOURCE: IEC 60050-482:2004, 482-05-17, modified – The existing note has been developed
into Notes 1, 2 and 3 to entry.]
3.2
nominal voltage
suitable approximate value of voltage used to designate or identify the voltage of a cell or
battery
Note 1 to entry: The nominal voltage of a sealed nickel-metal hydride rechargeable single cell: 1,2 V.
Note 2 to entry: The nominal voltage of a battery of n series connected cells is equal to n times the nominal
voltage of a single cell.

---------------------- Page: 8 ----------------------
IEC 62675:2014  IEC 2014 – 7 –
[SOURCE: IEC 60050-482:2004, 482-03-31, modified – Addition of Notes 1 and 2 to entry.]
3.3
rated capacity
capacity value of a battery determined under specified conditions and declared by the
manufacturer
Note 1 to entry: The rated capacity is the quantity of electricity C Ah (ampere-hours) declared by the
5
manufacturer which a battery can deliver when discharged at the reference test current of 0,2 I A to a final voltage
t
of 1,0 V at +20 °C when charged, stored and discharged under the conditions specified in Clause 7.
[SOURCE: IEC 60050-482:2004, 482-03-15, modified – Addition of Note 1 to entry.]
4 Parameter measurement tolerances
The overall accuracy of controlled or measured values, relative to the specified or actual
values, shall be within these tolerances:
a) ±1 % for voltage;
b) ±1 % for current;
c) ±2 °C for temperature;
d) ±0,1 % for time;
e) ±1 % for capacity.
These tolerances comprise the combined accuracy of the measuring instruments, the
measurement techniques used, and all other sources of error in the test procedure.
The details of the instrumentation used shall be provided in any report of results.
5 Designation and marking
5.1 Cell designation
Sealed nickel-metal hydride prismatic secondary single cells shall be designated by the letter
"HP" followed by a letter L, M, H or X which signifies:
– low rate of discharge (L);
– medium rate of discharge (M);
– high rate of discharge (H);
– very high rate of discharge (X).
NOTE These types of cells are typically but not exclusively used for the following discharge rates
– L up to 0,5 I A,
t
– M up to 3,5 I A,
t
– H up to 7,0 I A,
t
– X up to and above 7,0 I A.
t
This group of two letters shall be followed by a group of figures indicative of the rated
capacity of the cell in ampere-hours.
Cells that have been tested at 20 °C and 5 °C but not at –18 °C shall carry an additional
marking of T5.
For example: HPH 100 or HPH 100 T5.

---------------------- Page: 9 ----------------------
– 8 – IEC 62675:2014  IEC 2014
Cells in cases of steel material shall be designated by the letter "S" after the figures.
For example: HPH 100 S or HPH 100 S T5.
5.2 Cell termination
This standard does not specify cell termination.
5.3 Marking
Each cell or monobloc shall carry durable markings giving the following minimum information:
• type of cell (designation as specified in 5.1; in addition, it is permissible for a manufacturer
to use his own type designation);
• name or identification of manufacturer or supplier;
• positive terminal: either a red washer or an indented or raised symbol, (see graphical
symbol 5005 of IEC 60417:2002).
5.4 Safety recommendations
The manufacturer shall provide recommendations for the safe handling of the cell. See also
IEC 61438.
6 Dimensions
Dimensions of cells shown in Figure 1 and Figure 2 are given in Table 1 and Table 2.
Lug
b d
IEC

NOTE Cells in steel container can have two or more terminals and four or more lugs.
Figure 1 – Example of a sealed prismatic cell in steel container
with two terminals and four lugs
h

---------------------- Page: 10 ----------------------
IEC 62675:2014  IEC 2014 – 9 –
b d

IEC
NOTE Cells in plastic container can have two or more terminals.
Figure 2 – Example of a sealed prismatic cell in plastic container with two terminals
Table 1 – Dimensions for sealed nickel-metal hydride
prismatic cells in steel containers
Maximum height, h Width, b Length, d
mm mm mm
210 155 55
320 230 61

Table 2 – Dimensions for sealed nickel-metal hydride
prismatic cells in plastic containers
Maximum height, h Width, b Length, d
mm mm mm
125 83 36
146 98 41
168 83 34
178 116 37, 40
191 134 49
195 60 78
200 120 47
224 182 55
300 220 224

NOTE 1 The dimensions given in Table 1 and Table 2 represent preferred values.

h

---------------------- Page: 11 ----------------------
– 10 – IEC 62675:2014  IEC 2014
NOTE 2 The widths relate to the overall width dimension of the cell excluding for cells in steel container the
thickness of the lug flanges. The values for widths and lengths given in Table 1 and Table 2 are maximum values;
their negative tolerances are given in Table 3.
NOTE 3 The values for height given in Table 1 and Table 2 relate to the maximum height over the terminals or the
closed cell vent, whichever is the greater. No lower limits are stated.
NOTE 4 The dimensions shown in Table 1 and Table 2 are not associated to particular cell capacities. They apply
to all kinds of sealed nickel-metal hydride prismatic cells, i.e. L, M, H and X types.
Table 3 – Measurement tolerances in millimetres
(valid for widths and lengths)
Up to and including 60 mm 0 to –2
Above 60 mm, up to and including 120 mm 0 to –3
Above 120 mm 0 to –4

7 Electrical tests
7.1 General
Charge and discharge currents for the tests in accordance with 7.2 to 7.10 inclusive shall be
based on the value of the rated capacity.
In all tests, except where noted, no leakage of electrolyte in liquid form shall be observed. A
cooling device may be necessary, referring to manufacturer’s instructions. When the
temperature on the cell reaches a level of 70 °C, the charge or discharge should be
discontinued.
In all electrical tests, safety pressure plate may be used at outside of the cell to prevent a
deformation of cell case.
7.2 Charging procedure for test purposes
Prior to charging, the cells shall have been discharged in an ambient temperature
of 20 °C ± 5 °C, at a constant current of 0,2 I A, down to a final voltage of 1,0 V.
t
Unless otherwise specified in this standard, the charge preceding the various discharge tests
scheduled, shall be carried out in an ambient temperature of 20 °C ± 5 °C and either
a) at a constant current of 0,2 I A for 4h, then at a constant current of 0,1 I A for 3 h to 4 h.
t
t
The duration of the charge shall therefore be 7 h to 8 h, or
b) at a constant current of 0,2 I A for 4 h 30 min, then at a constant current of 0,05 I A
t
t
for 3 h to 4 h. The duration of the charge shall therefore be 7 h 30 min to 8 h 30 min.
7.3 Discharge performance
7.3.1 General
The following discharge tests shall be carried out in the sequence given.
All cells shall be tested at 20 °C as well as at +5 °C and/or –18 °C.
7.3.2 Discharge performance at 20 °C
The cell shall have been charged in accordance with 7.2. After charging, the cell shall be
stored, in an ambient temperature of 20 °C ± 5 °C , for not less than 1 h and not more than
4 h. It shall then be discharged in the same ambient temperature and as specified in Table 4.
The duration of discharge shall be not less than the minimum specified in Table 4.

---------------------- Page: 12 ----------------------
IEC 62675:2014  IEC 2014 – 11 –
The 0,2 I A discharge test is performed in order to verify the declared rated capacity of
t
the cell.
Table 4 – Discharge performance at 20 °C
Discharge conditions Minimum discharge duration
Rate of constant current Final Cell designation
voltage
A V L M H X

a
0,2 I 1,0 5 h 5 h 5 h 5 h

t
1,0 I 1,0 – 38 min 48 min 54 min
t

b
5,0 I 0,8 – – 2 min 30 s 6 min 30 s
t

b
10,0 I
0,8 – – – 1 min 30 s
t
a
Five cycles are permitted for this test which shall, however, be terminated at the end of the first cycle which
meets the requirement.
b
Before the 5 I A and the 10 I A discharge tests, a conditioning cycle may be included if necessary. This cycle
t t
shall consist of charging and discharging in accordance with 7.2 and 7.3.2.

7.3.3 Discharge performance at +5 °C
The cell shall have been charged in accordance with 7.2. After charging, the cell shall be
stored, in an ambient temperature of +5 °C ± 2 °C, for 24 h. Means shall be provided to
ensure that the electrolyte temperature has reached +5 °C ± 2 °C within 24 h. It shall then be
discharged in the same ambient temperature and as specified in Table 5.
The duration of discharge shall be not less than the minimum specified in Table 5.
Table 5 – Discharge performance at +5 °C
Discharge conditions Minimum discharge duration
Rate of constant Final voltage Cell designation
current
A V L M H X
0,2 I 1,0 3 h 24 min 3 h 42 min 3 h 54 min 4 h 18 min
t
1,0 I 1,0 – 25 min 36 min 44 min
t
a
2,0 I
1,0 – – 10 min 18 min 30 s
t
a
3,0 I 0,8 – – – 10 min 30 s
t
a
 Before the 2 I A and 3 I A tests, a conditioning cycle may be included if necessary. This cycle shall consist of
t t
charging and discharging, in an ambient temperature of 20 °C ± 5 °C, according to 7.2 and 7.3.2.

7.3.4 Discharge performance at –18 °C
The cell shall have been charged in accordance with 7.2. After charging, the cell shall be
stored in an ambient temperature of –18 °C ± 2 °C, for 24 h. Means shall be provided to
ensure that the electrolyte temperature has reached –18 °C ± 2 °C within 24 h. It shall then be
discharged in the same ambient temperature and as specified in Table 6. The duration of
discharge shall be not less than the minimum specified in Table 6.

---------------------- Page: 13 ----------------------
– 12 – IEC 62675:2014  IEC 2014
Table 6 – Discharge performance at –18 °C
Discharge conditions Minimum discharge duration
Rate of constant Final voltage Cell designation
current
A V L M H X
0,2 I 1,0 2 h 8 min 2 h 24 min 2 h 39 min 2 h 54 min
t

1,0 I 0,9 – 12 min 21 min 27 min
t
a
2,0 I 0,9 – – 6 min 9 min

t
a
3,0 I
0,8 – – – 4 min
t
a
Before the 2 I A and 3 I A discharge tests, a conditioning cycle may be included if necessary. This cycle shall
t t
consist of charging a
...