EN 62133-2:2017

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.DWHULMHAccumulateurs alcalins et autres accumulateurs à électrolyte non acide - Exigences de sécurité pour les accumulateurs portables étanches, et pour les batteries qui en sont constituées, destinés à l'utilisation dans des applications portables - Partie 2: Systèmes au lithiumSecondary cells and batteries containing alkaline or other non-acid electrolytes - Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications - Part 2: Lithium systems29.220.30EDWHULMHAlkaline secondary cells and batteriesICS:Ta slovenski standard je istoveten z:EN 62133-2:2017SIST EN 62133-2:2017en01-september-2017SIST EN 62133-2:2017SLOVENSKI
STANDARDSIST EN 62133:20131DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 62133-2
May 2017 ICS 29.220.30
Supersedes
EN 62133:2013 (partially)
English Version
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications - Part 2: Lithium systems (IEC 62133-2:2017)
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Exigences de sécurité pour les accumulateurs portables étanches, et pour les batteries qui en sont constituées, destinés à l'utilisation dans des applications portables - Partie 2: Systèmes au lithium (IEC 62133-2:2017)
Sekundärzellen und -batterien mit alkalischen oder anderen nichtsäurehaltigen Elektrolyten - Sicherheitsanforderungen für tragbare gasdichte Akkumulatoren und daraus hergestellte Batterien für die Verwendung in tragbaren Geräten - Teil 2: Lithiumsysteme (IEC 62133-2:2017) This European Standard was approved by CENELEC on 2017-03-14. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,
B-1000 Brussels © 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62133-2:2017 E SIST EN 62133-2:2017

This document supersedes EN 62133:2013 (partially). 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 62133-2:2017 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60051 NOTE Harmonized in EN 60051 series. IEC 60664 NOTE Harmonized in EN 60664 series. IEC 61434 NOTE Harmonized as EN 61434. IEC 62281 NOTE Harmonized as EN 62281. SIST EN 62133-2:2017

Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.
Publication Year Title EN/HD Year IEC 60050-482 2004
International Electrotechnical Vocabulary (IEV) - Part 482: Primary and secondary cells and batteries - -
IEC 61960 -
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium cells and batteries for portable applications EN 61960 -
ISO/IEC Guide 51 -
Safety aspects - Guidelines for their inclusion in standards - -
IEC 62133-2 Edition 1.0 2017-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Secondary cells and batteries containing alkaline or other non-acid electrolytes – Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications –
Part 2: Lithium systems
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide – Exigences de sécurité pour les accumulateurs portables étanches, et pour les batteries qui en sont constituées, destinés à l’utilisation dans des applications portables –
Partie 2: Systèmes au lithium
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE
ICS 29.220.30
ISBN 978-2-8322-3910-0
– 2 – IEC 62133-2:2017 © IEC 2017 CONTENTS FOREWORD . 5 1 Scope . 7 2 Normative references . 7 3 Terms and definitions . 7 4 Parameter measurement tolerances . 10 5 General safety considerations . 10 5.1 General . 10 5.2 Insulation and wiring . 11 5.3 Venting . 11 5.4 Temperature, voltage and current management . 11 5.5 Terminal contacts . 11 5.6 Assembly of cells into batteries . 12 5.6.1 General . 12 5.6.2 Design recommendation . 12 5.6.3 Mechanical protection for cells and components of batteries . 13 5.7 Quality plan . 13 5.8 Battery safety components . 13 6 Type test and sample size . 13 7 Specific requirements and tests . 14 7.1 Charging procedures for test purposes . 14 7.1.1 First procedure . 14 7.1.2 Second procedure . 14 7.2 Intended use . 15 7.2.1 Continuous charging at constant voltage (cells) . 15 7.2.2 Case stress at high ambient temperature (battery) . 15 7.3 Reasonably foreseeable misuse . 15 7.3.1 External short-circuit (cell) . 15 7.3.2 External short-circuit (battery). 16 7.3.3 Free fall . 16 7.3.4 Thermal abuse (cells) . 16 7.3.5 Crush (cells) . 17 7.3.6 Over-charging of battery . 17 7.3.7 Forced discharge (cells) . 17 7.3.8 Mechanical tests (batteries) . 18 7.3.9 Design evaluation – Forced internal short-circuit (cells) . 19 8 Information for safety . 21 8.1 General . 21 8.2 Small cell and battery safety information . 22 9 Marking . 22 9.1 Cell marking . 22 9.2 Battery marking. 23 9.3 Caution for ingestion of small cells and batteries . 23 9.4 Other information . 23 10 Packaging and transport . 23 Annex A (normative)
Charging and discharging range of secondary lithium ion cells for safe use . 24 SIST EN 62133-2:2017

IEC 62133-2:2017 © IEC 2017 – 3 –
A.1 General . 24 A.2 Safety of lithium ion secondary battery . 24 A.3 Consideration on charging voltage . 24 A.3.1 General . 24 A.3.2 Upper limit charging voltage . 24 A.4 Consideration of temperature and charging current . 26 A.4.1 General . 26 A.4.2 Recommended temperature range . 26 A.4.3 High temperature range . 27 A.4.4 Low temperature range . 28 A.4.5 Scope of the application of charging current . 29 A.4.6 Consideration of discharge . 29 A.5 Sample preparation . 30 A.5.1 General . 30 A.5.2 Insertion procedure for nickel particle to generate internal short . 30 A.5.3 Disassembly of charged cell . 31 A.5.4 Shape of nickel particle . 31 A.5.5 Insertion of nickel particle in cylindrical cell . 31 A.5.6 Insertion of nickel particle in prismatic cell . 34 A.6 Experimental procedure of the forced internal short-circuit test . 36 A.6.1 Material and tools for preparation of nickel particle . 36 A.6.2 Example of a nickel particle preparation procedure . 37 A.6.3 Positioning (or placement) of a nickel particle . 37 A.6.4 Damaged separator precaution . 38 A.6.5 Caution for rewinding separator and electrode . 38 A.6.6 Insulation film for preventing short-circuit . 39 A.6.7 Caution when disassembling a cell . 39 A.6.8 Protective equipment for safety . 39 A.6.9 Caution in the case of fire during disassembling . 39 A.6.10 Caution for the disassembling process and pressing the electrode core . 39 A.6.11 Recommended specifications for the pressing device . 39 Annex B (informative)
Recommendations to equipment manufacturers
and battery assemblers . 42 Annex C (informative)
Recommendations to the end-users . 43 Annex D (normative)
Measurement of the internal AC
resistance for coin cells . 44 D.1 General . 44 D.2 Method . 44 Annex E (informative)
Packaging and transport . 45 Annex F (informative)
Component standards references . 46 Bibliography . 47
Figure 1 – Forced discharge time chart . 18 Figure 2 – Jig for pressing . 21 Figure 3 – Ingestion gauge . 22 Figure A.1 – Representation of lithium ion cells
operating region for charging . 25 Figure A.2 – Representation of lithium ion cell operating region for discharging . 30 Figure A.3 – Shape of nickel particle . 31 SIST EN 62133-2:2017

– 4 – IEC 62133-2:2017 © IEC 2017 Figure A.4 – Nickel particle insertion position between positive and negative
active material coated area of cylindrical cell . 31 Figure A.5 – Nickel particle insertion position between positive
aluminium foil and negative active material coated area of cylindrical cell . 32 Figure A.6 – Disassembly of cylindrical cell . 33 Figure A.7 – Nickel particle insertion position between positive and negative
(active material) coated area of prismatic cell . 34 Figure A.8 – Nickel particle insertion position between positive aluminium
foil and negative (active material) coated area of prismatic cell . 35 Figure A.9 – Disassembly of prismatic cells . 36 Figure A.10 – Dimensions of a completed nickel particle . 37 Figure A.11 – Positioning of the nickel particle when it cannot be placed in the specified area . 38 Figure A.12 – Cylindrical cell . 38 Figure A.13 – Distance / time ratio of several types of pressing devices . 41
Table 1 – Sample size for type tests . 14 Table 2 – Condition of charging procedure . 15 Table 3 – Conditions for vibration test . 19 Table 4 – Shock parameters . 19 Table 5 – Ambient temperature for cell test . 20 Table A.1 – Examples of operating region charging parameters . 25 Table A.2 – Recommended specifications of a pressing device . 40 Table F.1 – Component standard references . 46
IEC 62133-2:2017 © IEC 2017 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
SECONDARY CELLS AND BATTERIES CONTAINING
ALKALINE OR OTHER NON-ACID ELECTROLYTES –
SAFETY REQUIREMENTS FOR PORTABLE SEALED
SECONDARY CELLS, AND FOR BATTERIES MADE
FROM THEM, FOR USE IN PORTABLE APPLICATIONS –
Part 2: Lithium systems
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 62133-2 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.
This first edition cancels and replaces the second edition of IEC 62133 published in 2012. It constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 62133:2012: – separation of nickel systems into a separate Part 1; – inclusion of coin cell requirements; SIST EN 62133-2:2017

– 6 – IEC 62133-2:2017 © IEC 2017 – update of assembly of cells into batteries (5.6); – mechanical tests [vibration, shock] (7.3.8.1, 7.3.8.2); – insertion of IEC TR 62914 within the Bibliography. The text of this standard is based on the following documents: FDIS Report on voting 21A/620/FDIS 21A/628/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. The following different practices of a less permanent nature exist in the countries indicated below. 7.3.9: Design evaluation – Forced internal short-circuit test only applies to Korea, Japan, Switzerland and France.
A list of all parts of the IEC 62133 series, published under the general title Secondary cells and batteries containing alkaline or other non-acid electrolytes – Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer.
IEC 62133-2:2017 © IEC 2017 – 7 –
SECONDARY CELLS AND BATTERIES CONTAINING
ALKALINE OR OTHER NON-ACID ELECTROLYTES –
SAFETY REQUIREMENTS FOR PORTABLE SEALED
SECONDARY CELLS, AND FOR BATTERIES MADE
FROM THEM, FOR USE IN PORTABLE APPLICATIONS –
Part 2: Lithium systems
1 Scope This part of IEC 62133 specifies requirements and tests for the safe operation of portable sealed secondary lithium cells and batteries containing non-acid electrolyte, under intended use and reasonably foreseeable misuse. 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. IEC 60050-482:2004, International Electrotechnical Vocabulary – Part 482: Primary and secondary cells and batteries (available at http://www.electropedia.org) IEC 61960, Secondary cells and batteries containing alkaline or other non-acid electrolytes – Secondary lithium cells and batteries for portable applications 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, ISO/IEC Guide 51 and the following apply. 3.1
safety freedom from unacceptable risk 3.2
risk combination of the probability of occurrence of harm and the severity of that harm 3.3
harm physical injury or damage to the health of people or damage to property or to the environment 3.4
hazard potential source of harm SIST EN 62133-2:2017

– 8 – IEC 62133-2:2017 © IEC 2017 3.5
intended use use of a product, process or service in accordance with specifications, instructions and information provided by the supplier 3.6
reasonably foreseeable misuse use of a product, process or service in a way which is not intended by the supplier, but which may result from readily predictable human behaviour 3.7
secondary cell basic manufactured unit providing a source of electrical energy by direct conversion of chemical energy, that consists of electrodes, separators, electrolyte, container and terminals, and that is designed to be charged electrically 3.8
secondary battery assembly of secondary cell(s) which may include associated safety and control circuits and case, ready for use as a source of electrical energy characterized by its voltage, size, terminal arrangement, capacity and rate capability Note 1 to entry: Includes single cell batteries. 3.9
leakage unplanned, visible escape of liquid electrolyte 3.10
venting release of excessive internal pressure from a cell or battery in a manner intended by design to preclude rupture or explosion 3.11
rupture mechanical failure of a cell container or battery case induced by an internal or external cause, resulting in exposure or spillage but not ejection of materials 3.12
explosion failure that occurs when a cell container or battery case opens violently and major components are forcibly expelled 3.13
fire emission of flames from a cell or battery 3.14
portable battery battery for use in a device or appliance which is conveniently hand-carried 3.15
portable cell cell intended for assembly in a portable battery 3.16
lithium ion polymer cell cell using gel polymer electrolyte or solid polymer electrolyte, not liquid electrolyte SIST EN 62133-2:2017

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3.17
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 C5 Ah (ampere-hours) declared by the manufacturer which a single cell can deliver when discharged at the reference test current of 0,2 It A to a specified final voltage, after charging, storing and discharging under specified conditions. [SOURCE: IEC 60050-482:2004, 482-03-15, modified – Note 1 to entry has been added.] 3.18
reference test current
It charge or discharge current expressed as a multiple of It A, where It A = C5 Ah/1 h, as defined in IEC 61434, and based on the rated capacity (C5 Ah) of the cell or battery 3.19
upper limit charging voltage highest charging voltage in the cell operating region, which is specified by the cell manufacturer 3.20
maximum charging current maximum charging current in the cell operating region, which is specified by the cell manufacturer 3.21
coin cell button cell coin battery small round cell or battery in which the overall height is less than the diameter Note 1 to entry: In English, the term “coin cell” or “coin battery” is used for lithium batteries only while the term “button cell” or “button battery” is only used for non-lithium batteries. In languages other than English, the terms “coin” and “button” are often used interchangeably, regardless of the electrochemical system. [SOURCE: IEC 60050-482:2004 482-02-40, modified — The term “coin battery” has been added, and the NOTE “In practice terms, the term coin is used exclusively for non-aqueous lithium cells.” has been replaced with Note 1 to entry.)] 3.22
cylindrical cell cell with a cylindrical shape in which the overall height is equal to or greater than the diameter [SOURCE: IEC 60050-482:2004, 482-02-39] 3.23
prismatic cell
cell having the shape of a parallelepiped whose faces are rectangular Note 1 to entry: Prismatic cells may be provided with either a rigid metal case or flexible laminate film case. [SOURCE: IEC 60050-482:2004, 482-02-38, modified − The source term is "prismatic" (adj.). In the definition, "qualifies a cell or a battery" has been replaced with "cell". Note 1 to entry has been added.] SIST EN 62133-2:2017

– 10 – IEC 62133-2:2017 © IEC 2017 3.24
cell block parallel connection arrangement of cells or batteries wherein all the positive terminals and all the negative terminals, respectively, are connected together [SOURCE: IEC 60050-482:2004, 482-03-39, modified — The term "cell block" has been added.] 3.25
functional safety part of the overall safety that depends on functional and physical units operating correctly in response to their inputs [SOURCE: IEC 60050-351:2013, 351-57-06] 3.26
end-of-discharge voltage final voltage specified voltage of a battery at which the battery discharge is terminated [SOURCE: IEC 60050-482:2004, 482-03-30, modified — The terms "cut-off voltage" and "end-point voltage" have been deleted.] 4 Parameter measurement tolerances The overall accuracy of controlled or measured values, relative to the specified or actual parameters, shall be within these tolerances: a) ± 1 %
for voltage; b) ± 1 %
for current; c) ± 2 °C
for temperature; d) ± 0,1 %
for time; e) ± 1 %
for dimension; f) ± 1 %
for capacity. These tolerances comprise the combined accuracy of the measuring instruments, the measurement techniques used, and all other sources of error in the test procedure. The details of the instrumentation used shall be provided in any report of results.
5 General safety considerations 5.1 General The safety of secondary cells and batteries requires the consideration of two sets of applied conditions: 1) intended use;
2) reasonably foreseeable misuse.
Cells and batteries shall be so designed and constructed that they are safe under conditions of both intended use and reasonably foreseeable misuse. It is expected that cells or batteries subjected to misuse may fail to function following such experience. They shall not however SIST EN 62133-2:2017

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present significant hazards. It may also be expected that cells and batteries subjected to intended use shall not only be safe but shall continue to be functional in all respects.
Potential hazards which are the subject of this document are: • fire, • burst/explosion, • leakage of cell electrolyte, • venting, • burns from excessively high external temperatures, • rupture of battery case with exposure of internal components. Conformity with 5.2 to 5.7 for cells and batteries other than coin cells, with an internal resistance greater than 3 Ω, is checked by inspection, by the tests of Clauses 7, and in accordance with the appropriate standard (see Clause 2 and Table 1). The internal resistance is to be measured in accordance with Annex D. 5.2 Insulation and wiring The insulation resistance between the positive terminal and externally exposed metal surfaces of the battery excluding electrical contact surfaces shall be not less than 5 MΩ at 500 V DC when measured 60 s after applying the voltage.
Internal wiring and insulation should be sufficient to withstand the maximum anticipated current, voltage and temperature requirements. The orientation of wiring should be such that adequate clearances and creepage distances are maintained between conductors. The mechanical integrity of internal connections should be sufficient to accommodate conditions of reasonably foreseeable misuse (i.e. solder alone is not considered a reliable means of connection.). 5.3 Venting Battery cases and cells shall incorporate a pressure relief mechanism or shall be so constructed that they will relieve excessive internal pressure at a value and rate that will preclude rupture, explosion and self-ignition. If encapsulation is used to support cells within an outer case, the type of encapsulant and the method of encapsulation shall neither cause the battery to overheat during normal operation nor inhibit pressure relief. 5.4 Temperature, voltage and current management The design of batteries shall be such that abnormal temperature-rise conditions are prevented. Batteries shall be designed to be within temperature, voltage and current limits as specified by the cell manufacturer. Batteries shall be provided with specifications and charging instructions for equipment manufacturers so that specified chargers are designed to maintain charging within the temperature, voltage and current limits specified.
5.5 Terminal contacts The size and shape of the terminal contacts shall ensure that they can carry the maximum anticipated current. External terminal contact surfaces shall be formed from conductive materials with good mechanical strength and corrosion resistance. Terminal contacts shall be arranged so as to minimize the risk of short-circuit. SIST EN 62133-2:2017

– 12 – IEC 62133-2:2017 © IEC 2017 5.6 Assembly of cells into batteries 5.6.1 General Each battery should have an independent control and protection for current, voltage, temperature and any other parameter required for safety and to maintain the cells within their operating region. However this protection may be provided external to the battery such as within the charger or the end devices. If protection is external to the battery, the manufacturer of the battery shall provide this safety relevant information to the external device manufacturer for implementation.
If there is more than one battery housed in a single battery case, each battery should have protective circuitry that can maintain the cells within their operating regions. Manufacturers of cells shall specify current, voltage and temperature limits so that the battery manufacturer/designer may ensure proper design and assembly (see Annex A). Batteries that are designed for the selective discharge of a portion of their series connected cells shall incorporate circuitry to prevent operation of cells outside the limits specified by the cell manufacturer. Protective circuit components should be added as appropriate and consideration given to the end-device application. The manufacturer of the battery should provide a safety analysis of the battery safety circuitry with a test report including a fault analysis of the protection circuit under both charging and discharging conditions confirming the compliance. 5.6.2 Design recommendation
The voltage of each cell, or each cellblock consisting of parallel-connected plural cells, should not exceed the upper limit of the charging voltage specified in Table 2, excepting the case where the portable electronic devices or similar devices have the equivalent function. The following should be considered at the battery level and by the device designer.
• For the battery consisting of a single cell or a single cellblock, it is recommended that the charging voltage of the cell does not exceed the upper limit of the charging voltage specified in Table 2; • For the battery consisting of series-connected plural single cells or series-connected plural cellblocks, it is recommended that the voltages of any one of the single cells or single cellblocks does not exceed the upper limit of the charging voltage, specified in Table 2, by monitoring the voltage of every single cell or the single cellblocks. • For the battery consisting of series-connected plural single cells or series-connected plural cellblocks, it is recommended that charging is stopped when the upper limit of the charging voltage is exceeded for any one of the single cells or single cellblocks by measuring the voltage of every single cell or the single cellblocks. • For batteries consisting of series-connected cells or cell blocks, nominal charge voltage shall not be counted as an overcharge protection. • For batteries consisting of series-connected cells or cell blocks, cells should have closely matched capacities, be of the same design, be of the same chemistry and be from the same manufacturer. • It is recommended that the cells and cell blocks should not be discharged beyond the cell manufacturer’s specified final voltage. • For batteries consisting of series-connected cells or cell blocks, cell balancing circuitry should be incorporated into the battery management system. SIST EN 62133-2:2017

IEC 62133-2:2017 © IEC 2017 – 13 –
5.6.3 Mechanical protection for cells and components of batteries Mechanical protection for cells, cell connections and control circuits within the battery should be provided to prevent damage as a result of intended use and reasonably foreseeable misuse. The mechanical protection can be provided by the battery case or it can be provided by the end product enclosure for those batteries intended for building into an end product.
The battery case and compartments housing cells should be designed to accommodate cell dimensional tolerances during charging and discharging as recommended by the cell manufacturer.
For batteries intended for building into a portable end product, testing with the battery installed within the end product should be considered when conducting mechanical tests. 5.7 Quality plan The manufacturer shall prepare and implement a quality plan that defines procedures for the inspection of materials, components, cells and batteries and which covers the whole process of producing each type of cell or battery. Manufacturers should understand their process capabilities and should institute the necessary process controls as they relate to product safety. 5.8 Battery safety components See Annex F. 6 Type test and sample size Tests are made with the number of cells or batteries specified in Table 1 using cells or batteries that are not more than six months old. The internal resistance of coin cells shall be measured in accordance with Annex D. Coin cells with internal resistance less than or equal to 3 Ω shall be tested in accordance with Table 1. Unless otherwise specified, tests are carried out in an ambient temperature of 20 °C ± 5 °C.
NOTE Test conditions are for type tests only and do not imply that intended use includes operation under these conditions. Similarly, the limit of six months is introduced for consistency and does not imply that battery safety is reduced after six months. SIST EN 62133-2:2017

– 14 – IEC 62133-2:2017 © IEC 2017 Table 1 – Sample size for type tests
Test Cell a, d Battery 7.2.1 Continuous charge 5 – 7.2.2
Case stress – 3 7.3.1
External short-circuit 5 per temperature – 7.3.2
External short-circuit – 5 7.3.3
Free fall 3 3 7.3.4
Thermal abuse 5 per temperature – 7.3.5
Crush
5 per temperature – 7.3.6
Overcharge
– 5 7.3.7
Forced discharge 5 – 7.3.8
Mechanical –
– 7.3.8.1 Vibration 3
– 7.3.8.2 Mechanical shock 3 7.3.9
Forced internal short b, c 5 per temperature – D.2
Measurement of the internal AC resistance for coin cells 3 – a
Excludes coin cells with an internal resistance greater than 3 Ω.
b
Country specific test: only required for listed countries. c
Not applicable to coin and lithium ion polymer cells. d For tests requiring charge procedure of 7.1.2 (procedure 2): 5 cells per temperature are tested
The safety analysis of 5.6.1 should identify those components of the protection circuit that are critical for short-circuit, overcharge and overdischarge protection. When conducting the short-circuit test, consideration should be given to the simulation of any single fault condition that is likely to occur in the protecting circuit that would affect the short-circuit test. 7 Specific requirements and tests 7.1 Charging procedures for test purposes 7.1.1 First procedure This charging procedure applies to subclauses other than those specified in 7.1.2. Unless otherwise stated in this document, the charging procedure for test purposes is carried out in an ambient temperature of 20 °C ± 5 °C, using the method declared by the manufacturer. Prior to charging, the battery shall have been discharged at 20 °C ± 5 °C at a constant current of 0,2 It A down to a specified final voltage. 7.1.2 Second procedure This charging procedure applies only to 7.3.1, 7.3.4, 7.3.5, and 7.3.9. After stabilization for 1 h and 4 h, respectively, at ambient temperature of highest test temperature and lowest test temperature, as specified in Table 2, cells are charged by using the upper limit charging voltage and maximum charging current, until the charging current is reduced to 0,05 It A, using a constant voltage charging method. SIST EN 62133-2:2017

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Table 2 – Condition of charging procedure Upper limit
charging voltage Maximum charging current Charging temperature upper limit Charging temperature lower limit Specified by the manufacturer of cells/cell Specified by the manufacturer of cells Specified by the manufacturer of cells Specified by the manufacturer of cells
See Figures A.1 and A.2 for an example of an operating region for charge and discharge. See Table A.1 for a list of lithium ion chemistries and examples of operating region parameters. Warning:
THESE TESTS USE PROCEDURES WHICH MAY RESULT IN HARM IF ADEQUATE PRECAUTIONS ARE NOT TAKEN. TESTS SHOULD ONLY BE PERFORMED BY QUALIFIED AND EXPERIENCED TECHNICIANS USING ADEQUATE PROTECTION. TO PREVENT BURNS, CAUTION SHOULD BE TAKEN FOR THOSE CELLS OR BATTERIES WHOSE CASES MAY EXCEED 75 °C AS A RESULT OF TESTING.
7.2 Intended use 7.2.1 Continuous charging at cons
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