Secondary lithium-ion cells for the propulsion of electric road vehicles - Part 1: Performance testing

IEC 62660-1:2018 is available as IEC 62660-1:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62660-1:2018 specifies performance and life testing of secondary lithium-ion cells used for propulsion of electric vehicles including battery electric vehicles (BEV) and hybrid electric vehicles (HEV). This document specifies the test procedures to obtain the essential characteristics of lithium-ion cells for vehicle propulsion applications regarding capacity, power density, energy density, storage life and cycle life. This document provides the standard test procedures and conditions for testing basic performance characteristics of lithium-ion cells for vehicle propulsion applications, which are indispensable for securing a basic level of performance and obtaining essential data on cells for various designs of battery systems and battery packs. IEC 62660-1:2018 cancels and replaces the first edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The purpose of each test has been added. b) The power test has been revised for clarification, and an informative part of the current-voltage characteristic test has been moved to the new Annex C.

Lithium-Ionen-Sekundärzellen für den Antrieb von Elektrostraßenfahrzeugen - Teil 1: Prüfung des Leistungsverhaltens

Eléments d'accumulateurs lithium-ion pour la propulsion des véhicules routiers électriques - Partie 1: Essais de performance

IEC 62660-1:2018 est disponible sous forme de IEC 62660-1:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 62660-1:2018 spécifie les essais de performance et de durée de vie des accumulateurs lithium-ion utilisés pour la propulsion des véhicules électriques, incluant les véhicules électriques à batterie (BEV) et les véhicules électriques hybrides (HEV). Le présent document spécifie les procédures d'essai afin d’obtenir les caractéristiques essentielles des éléments lithium-ion destinés aux applications de propulsion de véhicules; ces caractéristiques concernent la capacité, la densité de puissance, la densité d'énergie, la durée de stockage et la durée de vie. Le présent document spécifie les procédures d'essai et les conditions normalisées pour effectuer les essais des caractéristiques de performance fondamentales des éléments lithium-ion destinés aux applications de propulsion de véhicules; ces caractéristiques sont indispensables pour fixer un niveau de performance de base et obtenir des données essentielles pour différentes conceptions de systèmes de batteries et de packs de batteries. L'IEC 62660-1:2018 annule et remplace la première édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) L’objet de chaque essai a été ajouté. b) L’essai de puissance a été révisé pour clarification, et une partie informative de l’essai des caractéristiques courant-tension a été transférée à la nouvelle Annexe C.

Sekundarni litij-ionski členi za pogon električnih cestnih vozil - 1. del: Preskušanje zmogljivosti

Ta del standarda IEC 62660 določa preskušanje zmogljivosti in življenjske dobe sekundarnih litij-ionskih členov za pogon električnih vozil, vključno z električnimi akumulatorskimi vozili (BEV) in hibridnimi električnimi vozili (HEV).
OPOMBA 1: Sekundarni litij-ionski člen za pogon priključnega hibridnega električnega vozila (PHEV) je mogoče preskusiti s postopkom uporabe BEV ali uporabe HEV v skladu z zasnovo baterijskega sistema na podlagi dogovora med proizvajalcem členov in kupcem.
Ta dokument določa preskusne postopke za pridobitev osnovnih lastnosti litij-ionskih členov za pogon vozil v povezavi z zmogljivostjo, gostoto porazdelitve moči, gostoto porazdelitve energije, obdobjem skladiščenja in življenjsko dobo.
Ta dokument podaja standardne preskusne postopke in pogoje za preskušanje osnovnih lastnosti zmogljivosti litij-ionskih členov za pogon vozil, ki so nepogrešljive za zagotavljanje osnovne ravni zmogljivosti in pridobivanje osnovnih podatkov o členih za različne zasnove baterijskih sistemov ter akumulatorjev.
OPOMBA 2: Na podlagi dogovora med proizvajalcem člena in kupcem je mogoče poleg pogojev, določenih v tem dokumentu, izbrati posebne preskusne pogoje. Selektivni preskusni pogoji so opisani v dodatku A.
OPOMBA 3: Preskusi zmogljivosti električno povezanih litij-ionskih členov je mogoče opraviti s sklicevanjem na ta dokument.
OPOMBA 4: Specifikacija preskusa za litij-ionske akumulatorje in sisteme je opredeljena v standardu ISO 12405-4 [1].

General Information

Status
Published
Publication Date
14-Feb-2019
Current Stage
6060 - Document made available
Due Date
15-Feb-2019
Completion Date
15-Feb-2019

RELATIONS

Buy Standard

Standard
EN IEC 62660-1:2019
English language
42 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day
Standard
EN 62660-1:2019
English language
42 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN IEC 62660-1:2019
01-maj-2019
Nadomešča:
SIST EN 62660-1:2011

Sekundarni litij-ionski členi za pogon električnih cestnih vozil - 1. del: Preskušanje

zmogljivosti

Secondary lithium-ion cells for the propulsion of electric road vehicles - Part 1:

Performance testing

Lithium-Ionen-Sekundärzellen für den Antrieb von Elektrostraßenfahrzeugen - Teil 1:

Prüfung des Leistungsverhaltens
Eléments d'accumulateurs lithium-ion pour la propulsion des véhicules routiers
électriques - Partie 1: Essais de performance
Ta slovenski standard je istoveten z: EN IEC 62660-1:2019
ICS:
29.220.20 Kislinski sekundarni členi in Acid secondary cells and
baterije batteries
43.120 Električna cestna vozila Electric road vehicles
SIST EN IEC 62660-1:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 62660-1:2019
---------------------- Page: 2 ----------------------
SIST EN IEC 62660-1:2019
EUROPEAN STANDARD EN IEC 62660-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2019
ICS 29.220.20; 43.120 Supersedes EN 62660-1:2011
English Version
Secondary lithium-ion cells for the propulsion of electric road
vehicles - Part 1: Performance testing
(IEC 62660-1:2018)

Eléments d'accumulateurs lithium-ion pour la propulsion Lithium-Ionen-Sekundärzellen für den Antrieb von

des véhicules routiers électriques - Partie 1: Essais de Elektrostraßenfahrzeugen - Teil 1: Prüfung des

performance Leistungsverhaltens
(IEC 62660-1:2018) (IEC 62660-1:2018)

This European Standard was approved by CENELEC on 2019-01-16. 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: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62660-1:2019 E
---------------------- Page: 3 ----------------------
SIST EN IEC 62660-1:2019
EN IEC 62660-1:2019 (E)
European foreword

The text of document 21/975/FDIS, future edition 2 of IEC 62660-1, prepared by IEC/TC 21

"Secondary cells and batteries" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 62660-1:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2019-10-16

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-01-16

document have to be withdrawn
This document supersedes EN 62660-1:2011.

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 62660-1:2018 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 62660-2 NOTE Harmonized as EN 62660-2
IEC 62660-3 NOTE Harmonized as EN 62660-3
IEC 61434:1996 NOTE Harmonized as EN 61434:1996 (not modified)
---------------------- Page: 4 ----------------------
SIST EN IEC 62660-1:2019
EN IEC 62660-1:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 1 Where 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
ISO/TR 8713 - Electrically propelled road vehicles - Vocabulary - -
---------------------- Page: 5 ----------------------
SIST EN IEC 62660-1:2019
---------------------- Page: 6 ----------------------
SIST EN IEC 62660-1:2019
IEC 62660-1
Edition 2.0 2018-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary lithium-ion cells for the propulsion of electric road vehicles –
Part 1: Performance testing
Éléments d’accumulateurs lithium-ion pour la propulsion des véhicules routiers
électriques –
Partie 1: Essais de performance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20; 43.120 ISBN 978-2-8322-6288-7

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: 7 ----------------------
SIST EN IEC 62660-1:2019
– 2 – IEC 62660-1:2018 © IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 7

4 Test conditions ................................................................................................................ 8

4.1 General ................................................................................................................... 8

4.2 Measuring instruments ............................................................................................ 9

4.2.1 Range of measuring devices ............................................................................ 9

4.2.2 Voltage measurement ...................................................................................... 9

4.2.3 Current measurement ...................................................................................... 9

4.2.4 Temperature measurements ............................................................................ 9

4.2.5 Other measurements ..................................................................................... 10

4.3 Tolerance ............................................................................................................. 10

4.4 Thermal stabilization ............................................................................................. 10

5 Dimension measurement ............................................................................................... 10

6 Mass measurement ....................................................................................................... 12

7 Electrical measurement ................................................................................................. 12

7.1 General ................................................................................................................. 12

7.2 General charge conditions .................................................................................... 12

7.3 Capacity ............................................................................................................... 12

7.4 SOC adjustment .................................................................................................... 13

7.5 Power ................................................................................................................... 13

7.5.1 General ......................................................................................................... 13

7.5.2 Test method .................................................................................................. 13

7.5.3 Calculation of power density .......................................................................... 14

7.5.4 Calculation of regenerative power density ...................................................... 15

7.6 Energy .................................................................................................................. 15

7.6.1 General ......................................................................................................... 15

7.6.2 Test method .................................................................................................. 16

7.6.3 Calculation of energy density ......................................................................... 16

7.7 Storage test .......................................................................................................... 17

7.7.1 General ......................................................................................................... 17

7.7.2 Charge retention test ..................................................................................... 17

7.7.3 Storage life test ............................................................................................. 18

7.8 Cycle life test ........................................................................................................ 18

7.8.1 General ......................................................................................................... 18

7.8.2 BEV cycle test ............................................................................................... 18

7.8.3 HEV cycle test ............................................................................................... 22

7.9 Energy efficiency test ............................................................................................ 26

7.9.1 General ......................................................................................................... 26

7.9.2 Common tests for BEV and HEV applications ................................................ 26

7.9.3 Test for cells of BEV application .................................................................... 28

7.9.4 Energy efficiency calculation for cells of HEV application ............................... 29

Annex A (informative) Selective test conditions .................................................................... 31

Annex B (informative) Cycle life test sequence .................................................................... 33

---------------------- Page: 8 ----------------------
SIST EN IEC 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 3 –

Annex C (informative) Current-voltage characteristic test ..................................................... 36

C.1 General ................................................................................................................. 36

C.2 Test method .......................................................................................................... 36

Bibliography .......................................................................................................................... 39

Figure 1 – Example of temperature measurement of cell ......................................................... 9

Figure 2 – Examples of maximum dimensions of cell ............................................................ 11

Figure 3 – Dynamic discharge profile A for BEV cycle test .................................................... 20

Figure 4 – Dynamic discharge profile B for BEV cycle test .................................................... 22

Figure 5 – Discharge-rich profile for HEV cycle test .............................................................. 24

Figure 6 – Charge-rich profile for HEV cycle test................................................................... 25

Figure 7 – Typical SOC swing by combination of two profiles for HEV cycle test ................... 26

Figure B.1 – Test sequence of BEV cycle test ....................................................................... 34

Figure B.2 – Concept of BEV cycle test ................................................................................. 35

Figure C.1 – Test order of the current-voltage characteristic test .......................................... 37

Table 1 – Discharge conditions ............................................................................................. 12

Table 2 – SOC and temperature condition for power test ...................................................... 13

Table 3 – Dynamic discharge profile A for BEV cycle test ..................................................... 20

Table 4 – Dynamic discharge profile B for BEV cycle test ..................................................... 21

Table 5 – Discharge-rich profile for HEV cycle test ............................................................... 24

Table 6 – Charge-rich profile for HEV cycle test .................................................................... 25

Table A.1 – Capacity test conditions ..................................................................................... 31

Table A.2 – Power test conditions ......................................................................................... 31

Table A.3 – Cycle life test conditions .................................................................................... 31

Table A.4 – Conditions for energy efficiency test for BEV application .................................... 32

Table B.1 – Test sequence of HEV cycle test ........................................................................ 35

Table C.1 – Charge and discharge current for the current-voltage characteristic test ............ 36

---------------------- Page: 9 ----------------------
SIST EN IEC 62660-1:2019
– 4 – IEC 62660-1:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SECONDARY LITHIUM-ION CELLS FOR
THE PROPULSION OF ELECTRIC ROAD VEHICLES –
Part 1: Performance testing
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 62660-1 has been prepared by IEC technical committee 21:

Secondary cells and batteries.

This second edition cancels and replaces the first edition published in 2010. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) The purpose of each test has been added.

b) The power test has been revised for clarification, and an informative part of the current-

voltage characteristic test has been moved to the new Annex C.
---------------------- Page: 10 ----------------------
SIST EN IEC 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
21/975/FDIS 21/985/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.

A list of all the parts in the IEC 62660 series, published under the general title Secondary

lithium-ion cells for the propulsion of electric road vehicles, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 11 ----------------------
SIST EN IEC 62660-1:2019
– 6 – IEC 62660-1:2018 © IEC 2018
INTRODUCTION

The commercialization of electric road vehicles including battery, hybrid and plug-in hybrid

electric vehicles has been accelerated in the global market, responding to the global concerns

on CO reduction and energy security. This, in turn, has led to rapidly increasing demand for

high-power and high-energy-density traction batteries. Lithium-ion batteries are estimated to

be one of the most promising secondary batteries for the propulsion of electric vehicles. In the

light of the rapid spread of hybrid electric vehicles and the emergence of battery and plug-in

hybrid electric vehicles, a standard method for testing performance requirements of lithium-

ion batteries is indispensable for securing a basic level of performance and obtaining

essential data for the design of vehicle systems and battery packs.

This document specifies performance testing for automobile traction lithium-ion cells that

basically differ from the other cells including those for portable and stationary applications

specified by other IEC standards. For automobile application, it is important to note the usage

specificity; i.e. the design diversity of automobile battery packs and systems, and specific

requirements for cells and batteries corresponding to each of such designs. Based on these

facts, the purpose of this document is to provide a basic test methodology with general

versatility, which serves a function in common primary testing of lithium-ion cells to be used in

a variety of battery systems.
This document is associated with ISO 12405-4 [1] .

IEC 62660-2 [2] specifies the reliability and abuse testing for lithium-ion cells for electric

vehicle application.

IEC 62660-3 [3] specifies the safety requirements of lithium-ion cells for electric vehicle

application.
___________
Numbers in square brackets refer to the Bibliography.
---------------------- Page: 12 ----------------------
SIST EN IEC 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 7 –
SECONDARY LITHIUM-ION CELLS FOR
THE PROPULSION OF ELECTRIC ROAD VEHICLES –
Part 1: Performance testing
1 Scope

This part of IEC 62660 specifies performance and life testing of secondary lithium-ion cells

used for propulsion of electric vehicles including battery electric vehicles (BEV) and hybrid

electric vehicles (HEV).

NOTE 1 Secondary lithium-ion cell used for propulsion of plug-in hybrid electric vehicle (PHEV) can be tested by

the procedure either for BEV application or HEV application, according to the battery system design, based on the

agreement between the cell manufacturer and the customer.

This document specifies the test procedures to obtain the essential characteristics of lithium-

ion cells for vehicle propulsion applications regarding capacity, power density, energy density,

storage life and cycle life.

This document provides the standard test procedures and conditions for testing basic

performance characteristics of lithium-ion cells for vehicle propulsion applications, which are

indispensable for securing a basic level of performance and obtaining essential data on cells

for various designs of battery systems and battery packs.

NOTE 2 Based on the agreement between the cell manufacturer and the customer, specific test conditions can be

selected in addition to the conditions specified in this document. Selective test conditions are described in Annex A.

NOTE 3 The performance tests for the electrically connected lithium-ion cells can be performed with reference to

this document.

NOTE 4 The test specification for lithium-ion battery packs and systems is defined in ISO 12405-4 [1].

2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements 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.
ISO/TR 8713, Electrically propelled road vehicles – Vocabulary
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO/TR 8713 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
---------------------- Page: 13 ----------------------
SIST EN IEC 62660-1:2019
– 8 – IEC 62660-1:2018 © IEC 2018
3.1
battery electric vehicle
BEV

electric vehicle with only a traction battery as power source for vehicle propulsion

3.2
hybrid electric vehicle
HEV

vehicle with both a rechargeable energy storage system and a fuelled power source for

propulsion
3.3
rated capacity

capacity value of a cell in ampere hours (Ah) determined under specified conditions and

declared by the cell manufacturer

Note 1 to entry: n in C is the time base in hours (h). In this document, n = 3 for BEV application and n = 1 for

HEV application unless otherwise specified.
3.4
reference test current in amperes (A) which is expressed as
I = C / 1
t n
Note 1 to entry: 1 has a dimension of time in hours (h).
Note 2 to entry: See IEC 61434:1996 [4], Clause 2.
3.5
room temperature
temperature of 25 °C ± 2 K
3.6
secondary lithium-ion cell
cell

secondary single cell whose electric energy is derived from the insertion and extraction

reactions of lithium ions between the anode and the cathode

Note 1 to entry: The secondary lithium-ion cell is a basic manufactured unit providing a source of electric energy

by direct conversion of chemical energy. It consists of electrodes, separators, electrolyte, container and terminals,

and is designed to be charged electrically.
3.7
state of charge
SOC
capacity in a cell expressed as a percentage of rated capacity
3.8
charge retention

ability of a cell to retain capacity on open circuit under specified conditions of storage

4 Test conditions
4.1 General

The details of the instrumentation used shall be provided in any report of results.

Test and measurement shall be conducted with caution to prevent a short circuit.
---------------------- Page: 14 ----------------------
SIST EN IEC 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 9 –

NOTE Test and measurement can be conducted under fixing condition recommended by the cell manufacturer.

4.2 Measuring instruments
4.2.1 Range of measuring devices

The instruments used shall enable the values of voltage, current and temperature to be

measured. The range of these instruments and measuring methods shall be chosen so as to

ensure the accuracy specified for each test.

For analogue instruments, this implies that the readings shall be taken in the last third of the

graduated scale.

Any other measuring instruments may be used provided they give an equivalent accuracy.

4.2.2 Voltage measurement
The resistance of the voltmeters used shall be at least 1 MΩ/V.
4.2.3 Current measurement

The entire assembly of ammeter, shunt and leads shall be of an accuracy class of 0,5 or

better.
4.2.4 Temperature measurements

The cell temperature shall be measured by use of a surface temperature measuring device

capable of an equivalent scale definition and accuracy of calibration as specified in 4.2.1. The

temperature shall be measured at a location which most closely reflects the cell temperature.

The temperature may be measured at additional appropriate locations, if necessary.

The examples for temperature measurement are shown in Figure 1. The instructions for

temperature measurement specified by the cell manufacturer shall be followed.
Prismatic or flat cell Cylindrical cell
Temperature measuring device
Cell
Cell Cell
Insulating material
IEC
Figure 1 – Example of temperature measurement of cell
---------------------- Page: 15 ----------------------
SIST EN IEC 62660-1:2019
– 10 – IEC 62660-1:2018 © IEC 2018
4.2.5 Other measurements

Other values may be measured by use of a measuring device, provided that it complies

with 4.3.
4.3 Tolerance

The overall accuracy of controlled or measured values, relative to the specified or actual

values, shall be within the following tolerances:
a) ± 0,1 % for voltage;
b) ± 1 % for current;
c) ± 2 K for temperature;
d) ± 0,1 % for time;
e) ± 0,1 % for mass;
f) ± 0,1 % for dimensions.

These tolerances comprise the combined accuracy of the measuring instruments, the

measurement technique used, and all other sources of error in the test procedure.

4.4 Thermal stabilization

For the stablization of cell temperature, the cell shall be soaked to a specified ambient

temperature for a minimum of 12 h. This period may be reduced if thermal stabilization is

reached. Thermal stabilization is considered to be reached if after one interval of 1 h, the

change of cell temperature is lower than 1 K.
5 Dimension measurement

The maximum dimension of the total width, thickness or diameter, and height of a cell shall be

measured at room temperature up to three significant figures in accordance with the

tolerances in 4.3.
Examples of maximum dimensions are shown in Figures 2a to 2f.
---------------------- Page: 16 ----------------------
SIST EN IEC 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 11 –
IEC
IEC
Figure 2a – Cyli
...

SLOVENSKI STANDARD
SIST EN 62660-1:2019
01-maj-2019
1DGRPHãþD
SIST EN 62660-1:2011

6HNXQGDUQLOLWLMLRQVNLþOHQL]DSRJRQHOHNWULþQLKFHVWQLKYR]LOGHO3UHVNXãDQMH

]PRJOMLYRVWL

Secondary lithium-ion cells for the propulsion of electric road vehicles - Part 1:

Performance testing

Lithium-Ionen-Sekundärzellen für den Antrieb von Elektrostraßenfahrzeugen - Teil 1:

Prüfung des Leistungsverhaltens
Eléments d'accumulateurs lithium-ion pour la propulsion des véhicules routiers
électriques - Partie 1: Essais de performance
Ta slovenski standard je istoveten z: EN IEC 62660-1:2019
ICS:
29.220.20 .LVOLQVNLVHNXQGDUQLþOHQLLQ Acid secondary cells and
EDWHULMH batteries
43.120 (OHNWULþQDFHVWQDYR]LOD Electric road vehicles
SIST EN 62660-1:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62660-1:2019
---------------------- Page: 2 ----------------------
SIST EN 62660-1:2019
EUROPEAN STANDARD EN IEC 62660-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2019
ICS 29.220.20; 43.120 Supersedes EN 62660-1:2011
English Version
Secondary lithium-ion cells for the propulsion of electric road
vehicles - Part 1: Performance testing
(IEC 62660-1:2018)

Eléments d'accumulateurs lithium-ion pour la propulsion Lithium-Ionen-Sekundärzellen für den Antrieb von

des véhicules routiers électriques - Partie 1: Essais de Elektrostraßenfahrzeugen - Teil 1: Prüfung des

performance Leistungsverhaltens
(IEC 62660-1:2018) (IEC 62660-1:2018)

This European Standard was approved by CENELEC on 2019-01-16. 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: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62660-1:2019 E
---------------------- Page: 3 ----------------------
SIST EN 62660-1:2019
EN IEC 62660-1:2019 (E)
European foreword

The text of document 21/975/FDIS, future edition 2 of IEC 62660-1, prepared by IEC/TC 21

"Secondary cells and batteries" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 62660-1:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2019-10-16

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-01-16

document have to be withdrawn
This document supersedes EN 62660-1:2011.

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 62660-1:2018 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 62660-2 NOTE Harmonized as EN 62660-2
IEC 62660-3 NOTE Harmonized as EN 62660-3
IEC 61434:1996 NOTE Harmonized as EN 61434:1996 (not modified)
---------------------- Page: 4 ----------------------
SIST EN 62660-1:2019
EN IEC 62660-1:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 1 Where 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
ISO/TR 8713 - Electrically propelled road vehicles - Vocabulary - -
---------------------- Page: 5 ----------------------
SIST EN 62660-1:2019
---------------------- Page: 6 ----------------------
SIST EN 62660-1:2019
IEC 62660-1
Edition 2.0 2018-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary lithium-ion cells for the propulsion of electric road vehicles –
Part 1: Performance testing
Éléments d’accumulateurs lithium-ion pour la propulsion des véhicules routiers
électriques –
Partie 1: Essais de performance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20; 43.120 ISBN 978-2-8322-6288-7

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: 7 ----------------------
SIST EN 62660-1:2019
– 2 – IEC 62660-1:2018 © IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 7

4 Test conditions ................................................................................................................ 8

4.1 General ................................................................................................................... 8

4.2 Measuring instruments ............................................................................................ 9

4.2.1 Range of measuring devices ............................................................................ 9

4.2.2 Voltage measurement ...................................................................................... 9

4.2.3 Current measurement ...................................................................................... 9

4.2.4 Temperature measurements ............................................................................ 9

4.2.5 Other measurements ..................................................................................... 10

4.3 Tolerance ............................................................................................................. 10

4.4 Thermal stabilization ............................................................................................. 10

5 Dimension measurement ............................................................................................... 10

6 Mass measurement ....................................................................................................... 12

7 Electrical measurement ................................................................................................. 12

7.1 General ................................................................................................................. 12

7.2 General charge conditions .................................................................................... 12

7.3 Capacity ............................................................................................................... 12

7.4 SOC adjustment .................................................................................................... 13

7.5 Power ................................................................................................................... 13

7.5.1 General ......................................................................................................... 13

7.5.2 Test method .................................................................................................. 13

7.5.3 Calculation of power density .......................................................................... 14

7.5.4 Calculation of regenerative power density ...................................................... 15

7.6 Energy .................................................................................................................. 15

7.6.1 General ......................................................................................................... 15

7.6.2 Test method .................................................................................................. 16

7.6.3 Calculation of energy density ......................................................................... 16

7.7 Storage test .......................................................................................................... 17

7.7.1 General ......................................................................................................... 17

7.7.2 Charge retention test ..................................................................................... 17

7.7.3 Storage life test ............................................................................................. 18

7.8 Cycle life test ........................................................................................................ 18

7.8.1 General ......................................................................................................... 18

7.8.2 BEV cycle test ............................................................................................... 18

7.8.3 HEV cycle test ............................................................................................... 22

7.9 Energy efficiency test ............................................................................................ 26

7.9.1 General ......................................................................................................... 26

7.9.2 Common tests for BEV and HEV applications ................................................ 26

7.9.3 Test for cells of BEV application .................................................................... 28

7.9.4 Energy efficiency calculation for cells of HEV application ............................... 29

Annex A (informative) Selective test conditions .................................................................... 31

Annex B (informative) Cycle life test sequence .................................................................... 33

---------------------- Page: 8 ----------------------
SIST EN 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 3 –

Annex C (informative) Current-voltage characteristic test ..................................................... 36

C.1 General ................................................................................................................. 36

C.2 Test method .......................................................................................................... 36

Bibliography .......................................................................................................................... 39

Figure 1 – Example of temperature measurement of cell ......................................................... 9

Figure 2 – Examples of maximum dimensions of cell ............................................................ 11

Figure 3 – Dynamic discharge profile A for BEV cycle test .................................................... 20

Figure 4 – Dynamic discharge profile B for BEV cycle test .................................................... 22

Figure 5 – Discharge-rich profile for HEV cycle test .............................................................. 24

Figure 6 – Charge-rich profile for HEV cycle test................................................................... 25

Figure 7 – Typical SOC swing by combination of two profiles for HEV cycle test ................... 26

Figure B.1 – Test sequence of BEV cycle test ....................................................................... 34

Figure B.2 – Concept of BEV cycle test ................................................................................. 35

Figure C.1 – Test order of the current-voltage characteristic test .......................................... 37

Table 1 – Discharge conditions ............................................................................................. 12

Table 2 – SOC and temperature condition for power test ...................................................... 13

Table 3 – Dynamic discharge profile A for BEV cycle test ..................................................... 20

Table 4 – Dynamic discharge profile B for BEV cycle test ..................................................... 21

Table 5 – Discharge-rich profile for HEV cycle test ............................................................... 24

Table 6 – Charge-rich profile for HEV cycle test .................................................................... 25

Table A.1 – Capacity test conditions ..................................................................................... 31

Table A.2 – Power test conditions ......................................................................................... 31

Table A.3 – Cycle life test conditions .................................................................................... 31

Table A.4 – Conditions for energy efficiency test for BEV application .................................... 32

Table B.1 – Test sequence of HEV cycle test ........................................................................ 35

Table C.1 – Charge and discharge current for the current-voltage characteristic test ............ 36

---------------------- Page: 9 ----------------------
SIST EN 62660-1:2019
– 4 – IEC 62660-1:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SECONDARY LITHIUM-ION CELLS FOR
THE PROPULSION OF ELECTRIC ROAD VEHICLES –
Part 1: Performance testing
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 62660-1 has been prepared by IEC technical committee 21:

Secondary cells and batteries.

This second edition cancels and replaces the first edition published in 2010. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) The purpose of each test has been added.

b) The power test has been revised for clarification, and an informative part of the current-

voltage characteristic test has been moved to the new Annex C.
---------------------- Page: 10 ----------------------
SIST EN 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
21/975/FDIS 21/985/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.

A list of all the parts in the IEC 62660 series, published under the general title Secondary

lithium-ion cells for the propulsion of electric road vehicles, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 11 ----------------------
SIST EN 62660-1:2019
– 6 – IEC 62660-1:2018 © IEC 2018
INTRODUCTION

The commercialization of electric road vehicles including battery, hybrid and plug-in hybrid

electric vehicles has been accelerated in the global market, responding to the global concerns

on CO reduction and energy security. This, in turn, has led to rapidly increasing demand for

high-power and high-energy-density traction batteries. Lithium-ion batteries are estimated to

be one of the most promising secondary batteries for the propulsion of electric vehicles. In the

light of the rapid spread of hybrid electric vehicles and the emergence of battery and plug-in

hybrid electric vehicles, a standard method for testing performance requirements of lithium-

ion batteries is indispensable for securing a basic level of performance and obtaining

essential data for the design of vehicle systems and battery packs.

This document specifies performance testing for automobile traction lithium-ion cells that

basically differ from the other cells including those for portable and stationary applications

specified by other IEC standards. For automobile application, it is important to note the usage

specificity; i.e. the design diversity of automobile battery packs and systems, and specific

requirements for cells and batteries corresponding to each of such designs. Based on these

facts, the purpose of this document is to provide a basic test methodology with general

versatility, which serves a function in common primary testing of lithium-ion cells to be used in

a variety of battery systems.
This document is associated with ISO 12405-4 [1] .

IEC 62660-2 [2] specifies the reliability and abuse testing for lithium-ion cells for electric

vehicle application.

IEC 62660-3 [3] specifies the safety requirements of lithium-ion cells for electric vehicle

application.
___________
Numbers in square brackets refer to the Bibliography.
---------------------- Page: 12 ----------------------
SIST EN 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 7 –
SECONDARY LITHIUM-ION CELLS FOR
THE PROPULSION OF ELECTRIC ROAD VEHICLES –
Part 1: Performance testing
1 Scope

This part of IEC 62660 specifies performance and life testing of secondary lithium-ion cells

used for propulsion of electric vehicles including battery electric vehicles (BEV) and hybrid

electric vehicles (HEV).

NOTE 1 Secondary lithium-ion cell used for propulsion of plug-in hybrid electric vehicle (PHEV) can be tested by

the procedure either for BEV application or HEV application, according to the battery system design, based on the

agreement between the cell manufacturer and the customer.

This document specifies the test procedures to obtain the essential characteristics of lithium-

ion cells for vehicle propulsion applications regarding capacity, power density, energy density,

storage life and cycle life.

This document provides the standard test procedures and conditions for testing basic

performance characteristics of lithium-ion cells for vehicle propulsion applications, which are

indispensable for securing a basic level of performance and obtaining essential data on cells

for various designs of battery systems and battery packs.

NOTE 2 Based on the agreement between the cell manufacturer and the customer, specific test conditions can be

selected in addition to the conditions specified in this document. Selective test conditions are described in Annex A.

NOTE 3 The performance tests for the electrically connected lithium-ion cells can be performed with reference to

this document.

NOTE 4 The test specification for lithium-ion battery packs and systems is defined in ISO 12405-4 [1].

2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements 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.
ISO/TR 8713, Electrically propelled road vehicles – Vocabulary
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO/TR 8713 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
---------------------- Page: 13 ----------------------
SIST EN 62660-1:2019
– 8 – IEC 62660-1:2018 © IEC 2018
3.1
battery electric vehicle
BEV

electric vehicle with only a traction battery as power source for vehicle propulsion

3.2
hybrid electric vehicle
HEV

vehicle with both a rechargeable energy storage system and a fuelled power source for

propulsion
3.3
rated capacity

capacity value of a cell in ampere hours (Ah) determined under specified conditions and

declared by the cell manufacturer

Note 1 to entry: n in C is the time base in hours (h). In this document, n = 3 for BEV application and n = 1 for

HEV application unless otherwise specified.
3.4
reference test current in amperes (A) which is expressed as
I = C / 1
t n
Note 1 to entry: 1 has a dimension of time in hours (h).
Note 2 to entry: See IEC 61434:1996 [4], Clause 2.
3.5
room temperature
temperature of 25 °C ± 2 K
3.6
secondary lithium-ion cell
cell

secondary single cell whose electric energy is derived from the insertion and extraction

reactions of lithium ions between the anode and the cathode

Note 1 to entry: The secondary lithium-ion cell is a basic manufactured unit providing a source of electric energy

by direct conversion of chemical energy. It consists of electrodes, separators, electrolyte, container and terminals,

and is designed to be charged electrically.
3.7
state of charge
SOC
capacity in a cell expressed as a percentage of rated capacity
3.8
charge retention

ability of a cell to retain capacity on open circuit under specified conditions of storage

4 Test conditions
4.1 General

The details of the instrumentation used shall be provided in any report of results.

Test and measurement shall be conducted with caution to prevent a short circuit.
---------------------- Page: 14 ----------------------
SIST EN 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 9 –

NOTE Test and measurement can be conducted under fixing condition recommended by the cell manufacturer.

4.2 Measuring instruments
4.2.1 Range of measuring devices

The instruments used shall enable the values of voltage, current and temperature to be

measured. The range of these instruments and measuring methods shall be chosen so as to

ensure the accuracy specified for each test.

For analogue instruments, this implies that the readings shall be taken in the last third of the

graduated scale.

Any other measuring instruments may be used provided they give an equivalent accuracy.

4.2.2 Voltage measurement
The resistance of the voltmeters used shall be at least 1 MΩ/V.
4.2.3 Current measurement

The entire assembly of ammeter, shunt and leads shall be of an accuracy class of 0,5 or

better.
4.2.4 Temperature measurements

The cell temperature shall be measured by use of a surface temperature measuring device

capable of an equivalent scale definition and accuracy of calibration as specified in 4.2.1. The

temperature shall be measured at a location which most closely reflects the cell temperature.

The temperature may be measured at additional appropriate locations, if necessary.

The examples for temperature measurement are shown in Figure 1. The instructions for

temperature measurement specified by the cell manufacturer shall be followed.
Prismatic or flat cell Cylindrical cell
Temperature measuring device
Cell
Cell Cell
Insulating material
IEC
Figure 1 – Example of temperature measurement of cell
---------------------- Page: 15 ----------------------
SIST EN 62660-1:2019
– 10 – IEC 62660-1:2018 © IEC 2018
4.2.5 Other measurements

Other values may be measured by use of a measuring device, provided that it complies

with 4.3.
4.3 Tolerance

The overall accuracy of controlled or measured values, relative to the specified or actual

values, shall be within the following tolerances:
a) ± 0,1 % for voltage;
b) ± 1 % for current;
c) ± 2 K for temperature;
d) ± 0,1 % for time;
e) ± 0,1 % for mass;
f) ± 0,1 % for dimensions.

These tolerances comprise the combined accuracy of the measuring instruments, the

measurement technique used, and all other sources of error in the test procedure.

4.4 Thermal stabilization

For the stablization of cell temperature, the cell shall be soaked to a specified ambient

temperature for a minimum of 12 h. This period may be reduced if thermal stabilization is

reached. Thermal stabilization is considered to be reached if after one interval of 1 h, the

change of cell temperature is lower than 1 K.
5 Dimension measurement

The maximum dimension of the total width, thickness or diameter, and height of a cell shall be

measured at room temperature up to three significant figures in accordance with the

tolerances in 4.3.
Examples of maximum dimensions are shown in Figures 2a to 2f.
---------------------- Page: 16 ----------------------
SIST EN 62660-1:2019
IEC 62660-1:2018 © IEC 2018 – 11 –
IEC
IEC
Figure 2a – Cylindrical cell (1) Figure 2b – Cylindrical c
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.