Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium cells and batteries for use in industrial applications (IEC 62620:2014)

This International Standard specifies marking, tests and requirements for lithium secondary
cells and batteries used in industrial applications including stationary applications.
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.
(e.g. IEC 62660 series on road vehicles).
The following are some examples of applications that utilize the cells and batteries under the
scope of this standard.
• Stationary applications: telecom, uninterruptible power supplies (UPS), electrical energy
storage system, utility switching, emergency power and similar applications.
• Motive applications: fork-lift truck, golf cart, AGV, railway, and marine, excluding road
vehicles.
Since this standard covers batteries for various industrial applications, it includes those
requirements, which are common and minimum to the various applications.
This standard applies to cells and batteries. If the battery is divided into smaller units, the
smaller unit can be tested as the representative of the battery. The manufacturer clearly
declares the tested unit. The manufacturer may add functions, which are present in the final
battery, to the tested unit.

Akkumulatoren und Batterien mit alkalischen oder anderen nichtsäurehaltigen Elektrolyten - Lithium-Akkumulatoren und -batterien für industrielle Anwendungen

Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Éléments et batteries d'accumulateurs au lithium pour utilisation dans les applications industrielles

L'IEC 62620:2014 spécifie le marquage, les essais et les exigences pour les éléments et les batteries d accumulateurs au lithium utilisés dans les applications industrielles, y compris les applications stationnaires. En cas d'existence d'une norme IEC spécifiant des conditions d'essai et des exigences pour des éléments destinés à des applications particulières, et qui serait en contradiction avec la présente norme, la publication particulière est appliquée en priorité (par exemple, la série IEC 62660 sur les véhicules routiers). Ci-après figurent des exemples d'applications utilisant les éléments et les batteries inclus dans le domaine d'application de la présente norme.
- Applications stationnaires: télécommunications, alimentation sans interruption (ASI), système de stockage de l'énergie électrique, sélecteur de service, alimentation d'urgence et applications analogues.
- Applications mobiles: chariot élévateur, voiturette de golf, AGV, ferroviaire, et marine, à l'exception des véhicules routiers.
La présente norme s'applique aux éléments et aux batteries. Si la batterie est divisée en unités plus petites, l'unité plus petite peut être soumise aux essais pour représenter l'ensemble de la batterie. Le fabricant déclare clairement l'unité soumise aux essais. Le fabricant peut ajouter des fonctions, qui sont présentes dans la batterie finale, à l'unité soumise aux essais.

Sekundarni členi in baterije z alkalnimi ali drugimi nekislinskimi elektroliti - Sekundarni litijevi členi in baterije za industrijsko uporabo (IEC 62620:2014)

Ta mednarodni standard določa označevanje, preskuse in zahteve za sekundarne litijeve člene in baterije za industrijsko rabo, vključno s stacionarno uporabo. Če obstaja standard IEC, ki določa preskusne pogoje in zahteve za člene za posebno uporabo ter je v nasprotju s tem standardom, ima prednost prvi. (npr. skupina standardov IEC 62660 o cestnih vozilih).
Spodaj je naštetih nekaj primerov uporabe členov in baterij v okviru tega standarda.
• Stacionarna uporaba: telekomunikacije, napajalniki za neprekinjeno napajanje (UPS), sistem za shranjevanje električne energije, preklapljanje storitev, zasilno napajanje in podobne uporabe.
• Pogonska uporaba: viličar, voziček za golf, AGV; železnica in pomorstvo, brez cestnih vozil.
Ker ta standard zajema baterije za različno industrijsko uporabo, vključuje skupne in minimalne zahteve za različno uporabo.
Ta standard velja za člene in baterije. Če je baterija razdeljena na manjše enote, je mogoče manjšo enoto preskusiti kot reprezentativno za baterijo. Proizvajalec jasno navaja preskušeno enoto. Proizvajalec lahko preskušeni enoti doda funkcije, ki jih vsebuje končna baterija.

General Information

Status
Published
Publication Date
26-Mar-2015
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
28-Jan-2015
Due Date
04-Apr-2015
Completion Date
27-Mar-2015

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 62620:2015
01-maj-2015
6HNXQGDUQLþOHQLLQEDWHULMH]DONDOQLPLDOLGUXJLPLQHNLVOLQVNLPLHOHNWUROLWL
6HNXQGDUQLOLWLMHYLþOHQLLQEDWHULMH]DLQGXVWULMVNRXSRUDER ,(&
Secondary cells and batteries containing alkaline or other non-acid electrolytes -
Secondary lithium cells and batteries for use in industrial applications (IEC 62620:2014)
Ta slovenski standard je istoveten z: EN 62620:2015
ICS:
29.220.30 $ONDOQLVHNXQGDUQLþOHQLLQ Alkaline secondary cells and
EDWHULMH batteries
SIST EN 62620:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62620:2015

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SIST EN 62620:2015


EUROPEAN STANDARD EN 62620

NORME EUROPÉENNE

EUROPÄISCHE NORM
January 2015
ICS 29.220.30

English Version
Secondary cells and batteries containing alkaline or other non-
acid electrolytes - Secondary lithium cells and batteries for use in
industrial applications
(IEC 62620:2014)
Accumulateurs alcalins et autres accumulateurs à Akkumulatoren und Batterien mit alkalischen oder anderen
électrolyte non acide - Éléments et batteries nichtsäurehaltigen Elektrolyten - Lithium-Akkumulatoren
d'accumulateurs au lithium pour utilisation dans les und -batterien für industrielle Anwendungen
applications industrielles (IEC 62620:2014)
(IEC 62620:2014)
This European Standard was approved by CENELEC on 2014-12-30. 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, 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
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 62620:2015 E

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SIST EN 62620:2015
EN 62620:2015 - 2 -
Foreword
The text of document 21A/561/FDIS, future edition 1 of IEC 62620, 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
EN 62620:2015.
The following dates are fixed:
– latest date by which the document has to be implemented at (dop) 2015-09-30
national level by publication of an identical national
standard or by endorsement
– latest date by which the national standards conflicting with (dow) 2017-12-30
the document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62620:2014 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 Harmonised in EN 60051 series (not modified).
IEC 61434 NOTE Harmonised in EN 61434 (not modified).
IEC 61960 NOTE Harmonised as EN 61960 (not modified).
IEC 62660 Series NOTE Harmonised in EN 62660 series (not modified).

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SIST EN 62620:2015
- 3 - EN 62620:2015
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
ISO/IEC Guide 51 - Safety aspects - Guidelines for their - -
inclusion in standards

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SIST EN 62620:2015

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SIST EN 62620:2015



IEC 62620

®


Edition 1.0 2014-11




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Secondary cells and batteries containing alkaline or other non-acid

electrolytes – Secondary lithium cells and batteries for use in industrial

applications




Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –

Éléments et batteries d'accumulateurs au lithium pour utilisation dans les


applications industrielles













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX U


ICS 29.220.30 ISBN 978-2-8322-1958-4



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

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SIST EN 62620:2015
– 2 – IEC 62620:2014 © IEC 2014
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Parameters measurement tolerances . 8
5 Marking and designation . 8
5.1 Marking . 8
5.2 Cell designation . 10
5.3 Battery designation . 12
5.3.1 General . 12
5.3.2 Battery structure formulation . 13
5.4 Cell or battery termination . 13
6 Electrical tests . 13
6.1 General . 13
6.2 Charging procedure for test purposes . 14
6.3 Discharge performance . 14
6.3.1 Discharge performance at +25 °C . 14
6.3.2 Discharge performance at low temperature . 15
6.3.3 High rate permissible current . 15
6.4 Charge (capacity) retention and recovery . 16
6.4.1 General . 16
6.4.2 Test method . 16
6.4.3 Acceptance criterion . 16
6.5 Cell and battery internal resistance . 17
6.5.1 General . 17
6.5.2 Measurement of the internal a.c. resistance . 17
6.5.3 Measurement of the internal d.c. resistance . 17
6.6 Endurance . 18
6.6.1 Endurance in cycles. 18
6.6.2 Endurance in storage at constant voltage (permanent charge life) . 19
7 Type test conditions . 20
7.1 General . 20
7.2 Sample size . 20
7.3 Conditions for type approval . 21
7.3.1 Dimensions . 21
7.3.2 Electrical tests . 22
Annex A (informative) Battery structure information . 23
A.1 Example 1 . 23
A.2 Example 2 . 23
A.3 Example 3 . 23
A.4 Example 4 . 23
A.5 Example 5 . 24
A.6 Example 6 . 24
A.7 Example 7 . 25
A.8 Example 8 . 25

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SIST EN 62620:2015
IEC 62620:2014 © IEC 2014 – 3 –
A.9 Example 9 . 26
Bibliography . 27

Figure 1 – Test sequence . 21
Figure A.1 – Structure 3S . 23
Figure A.2 – Structure 2P . 23
Figure A.3 – Structure 3S2P . 23
Figure A.4 – Structure 2P4S . 24
Figure A.5 – Structure 2P4S3P . 24
Figure A.6 – Structure (2P4S)3P . 25
Figure A.7 – Structure (3S2P)3P . 25
Figure A.8 – Structure (5S)4S . 26
Figure A.9 – Structure ((3S2P)3P)2S . 26

Table 1 – Marking . 10
Table 2 – Discharge performance at +25 °C ± 5 °C . 14
Table 3 – Discharge performance at low temperature . 15
Table 4 – Discharge current values for high rate permissible test . 16
Table 5 – Constant discharge current used for measurement of the internal d.c.
resistance . 18
Table 6 – Type test . 20
Table 7 – Severe conditions . 22

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SIST EN 62620:2015
– 4 – IEC 62620:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SECONDARY CELLS AND BATTERIES CONTAINING
ALKALINE OR OTHER NON-ACID ELECTROLYTES –
SECONDARY LITHIUM CELLS AND BATTERIES
FOR USE IN INDUSTRIAL APPLICATIONS

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 62620 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/561/FDIS 21A/572/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.

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SIST EN 62620:2015
IEC 62620:2014 © 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.

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SIST EN 62620:2015
– 6 – IEC 62620:2014 © IEC 2014
SECONDARY CELLS AND BATTERIES CONTAINING
ALKALINE OR OTHER NON-ACID ELECTROLYTES –
SECONDARY LITHIUM CELLS AND BATTERIES
FOR USE IN INDUSTRIAL APPLICATIONS



1 Scope
This International Standard specifies marking, tests and requirements for lithium secondary
cells and batteries used in industrial applications including stationary applications.
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.
(e.g. IEC 62660 series on road vehicles).
The following are some examples of applications that utilize the cells and batteries under the
scope of this standard.
• Stationary applications: telecom, uninterruptible power supplies (UPS), electrical energy
storage system, utility switching, emergency power and similar applications.
• Motive applications: fork-lift truck, golf cart, AGV, railway, and marine, excluding road
vehicles.
Since this standard covers batteries for various industrial applications, it includes those
requirements, which are common and minimum to the various applications.
This standard applies to cells and batteries. If the battery is divided into smaller units, the
smaller unit can be tested as the representative of the battery. The manufacturer clearly
declares the tested unit. The manufacturer may add functions, which are present in the final
battery, to the tested unit.
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
ISO/IEC Guide 51, Safety aspects – Guidelines for their inclusion in standards
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-482 and
ISO/IEC Guide 51 as well as the following apply.
3.1
charge recovery
capacity recovery
capacity that a cell or battery can deliver after the charge following the charge retention test

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SIST EN 62620:2015
IEC 62620:2014 © IEC 2014 – 7 –
Note 1 to entry: Charge retention is defined in 3.2.
3.2
charge retention
capacity retention
capacity that a cell or battery can deliver after storage, at a specific temperature, for a
specific time without subsequent recharge as a percentage of the rated capacity
3.3
final voltage
end-of-discharge voltage
specified closed circuit voltage at which the discharge of a cell or battery is terminated
3.4
nominal voltage
suitable approximate value of the voltage used to designate or identify a cell or a battery
Note 1 to entry: The cell or battery manufacturer may provide the nominal voltage.
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.
[SOURCE: IEC 60050-482:2004, 482-03-31, modified – Addition of Notes 1 and 2 to entry.]
3.5
rated capacity
capacity value of a cell or battery determined under specified conditions and declared by the
manufacturer
Note 1 to entry: The rated capacity is the quantity of electricity Cn Ah (ampere-hours) declared by the
manufacturer which a single cell or battery can deliver during a n h period when charging, storing and discharging
under the conditions specified in 6.3.1. n is 5 for an E, M and H discharge rate type cell or battery. n is 8, 10, 20 or
240 for an S discharge rate type battery.
[SOURCE: IEC 60050-482:2004, 482-03-15, modified – Addition of Note 1 to entry.]
3.6
cell
secondary lithium cell
secondary cell where electrical energy is derived from the insertion/extraction reactions of
lithium ions or oxidation/reduction reaction of lithium between the negative electrode and the
positive electrode
Note 1 to entry: The cell typically has an electrolyte that consists of a lithium salt and organic solvent compound
in liquid, gel or solid form and has a metal or a laminate film casing. It is not ready for use in an application
because it is not yet fitted with its final housing, terminal arrangement and electronic control device.
3.7
cell block
group of cells connected together in parallel configuration with or without protective devices
(e.g. fuse or PTC) and monitoring circuitry
Note 1 to entry: It is not ready for use in an application because it is not yet fitted with its final housing, terminal
arrangement and electronic control device.
3.8
module
group of cells connected together either in a series and/or parallel configuration with or
without protective devices (e.g. fuse or PTC) and monitoring circuitry

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SIST EN 62620:2015
– 8 – IEC 62620:2014 © IEC 2014
3.9
battery pack
energy storage device, which is comprised of one or more cells or modules electrically
connected
Note 1 to entry: It may incorporate a protective housing and be provided with terminals or other interconnection
arrangement. It may include protective devices and control and monitoring, which provides information (e.g. cell
voltage) to a battery system.
3.10
battery system
battery
system which incorporates one or more cells, modules or battery packs; it has a battery
management system
Note 1 to entry: It may have cooling or heating units.
3.11
battery management system
BMS
electronic system associated with a battery which monitors and/or manages its state,
calculates secondary data, reports that data and/or controls its environment to influence the
battery’s safety, performance and/or service life and has the functions to cut off in case of
over charging, over current and over heating
Note 1 to entry: The function of the BMS can be assigned to the battery pack or to equipment that uses the
battery.
Note 2 to entry: A BMS is sometimes also referred to as a BMU (battery management unit).
4 Parameters measurement tolerances
The overall accuracy of controlled or measured values, relative to the specified or actual
values, shall be within the following tolerances:
a) ±0,5 % for voltage;
b) ±1 % for current;
c) ±2 °C for temperature;
d) ±0,1 % for time;
e) ±1 % for dimensions.
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 Marking and designation
5.1 Marking
The marking items shown in Table 1 are indicated on the cell, battery system or instruction
manual. When marked on the cell or battery system, each cell or battery system that is
installed or maintained shall carry clear and durable markings giving the information.
The following options are allowed:
• if there are designations on a battery system, designations are not necessary on the
battery pack, module or cell;

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SIST EN 62620:2015
IEC 62620:2014 © IEC 2014 – 9 –
• if there are designations on a battery pack, designations are not necessary on the module
and cell;
• if there are designations on a module, designations are not necessary on the cell.
However, for a transportable unit (i.e. a unit that is being shipped), it is necessary to provide
the marking information on the main transportable unit or in its instruction manual.
Furthermore, if there is a marking matter of arrangement between the purchaser and the
manufacturer, it shall comply with the agreement.
See Table 1.
Each cell or battery that is installed or maintained shall carry clear and durable markings
giving the following information:
• secondary (rechargeable) Li or Li-ion;
• polarity (can be deleted if there is an agreement between cell and pack manufacturer);
• date of manufacture (which may be in code);
• name or identification of manufacturer or supplier;
• rated capacity;
• nominal voltage;
• appropriate caution statement.
The model name and manufacturing traceability shall be marked on the cell and battery
surface. The other items listed above can be marked on the smallest package or supplied with
the cell or the battery.
The following information shall be marked on or supplied with the cell or the battery:
• disposal instructions;
• recommended charge instructions.
The following information shall be marked on the cell or when there is no marking place on
the cell, it shall be marked in the manual.
• cell designation as specified in 5.2.

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SIST EN 62620:2015
– 10 – IEC 62620:2014 © IEC 2014
Table 1 – Marking
Cell block Battery system
Marking information Cell Module or
Battery pack
Secondary (rechargeable) Li or Li-ion R R R
Polarity (see NOTE 1) R R R

Date of manufacture (which may be in code)* (see NOTE 2) R R R
a
Name or identification of manufacturer or supplier R R R

b
Rated capacity R R R
c
Calculated rated capacity* -- -- R

c
Method for calculating rated capacity* -- -- R
Nominal voltage R R R

Watt-hour* (see NOTE 3) V V V
Appropriate caution statement (Including disposal R R R
instructions)
Cell designation as specified in 5.2 R -- --
Battery designation as specified in 5.4 - R R
Recommended charge instructions R R R
“R” = required;  “V“ = voluntary,  “--“ = unnecessary or not applicable
a It is necessary to mark designations on the main battery system.
b Tested by main battery system; shall be indicated on the main battery system.
c If evaluated by testing the split unit of a battery system; it shall be indicated as the rated capacity and shall be the
amount calculated by a reasonable method.
For example:
Measured rated capacity of module: 10 Ah
Number of modules connected in parallel: 5
Calculated rated capacity (Ah) = 10 Ah × 5 = 50 Ah
NOTE 1 There is an exception, see 5.1.
NOTE 2 The date can be in the form of a code.
NOTE 3 Watt-hour (Wh) designation on cell, module, battery
...

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