SIST EN 60952-2:2014

Aircraft batteries - Part 2: Design and construction requirements

This part of IEC 60952 series defines the physical design, construction and material requirements for nickel-cadmium and lead-acid aircraft batteries containing vented or valveregulated cells or monoblocs. The batteries are used for both general purposes and specific aerospace applications. The specific topics addressed in this part serve to establish acceptable quality standards required to qualify a battery as airworthy as defined in Clause 3 of IEC 60952-1:2013. A preferred range of aircraft batteries is specified in Annex A, but this part of IEC 60952 series may be used for other battery sizes, arrangements and ratings. For particular applications, other design requirements may be stipulated. These will be in addition to the requirements of this part and will be covered by specific documents. It is recognised that additional data may be required by other organisations (national standards bodies, AECMA, SAE, etc.). The present standard can be used as a framework to devise tests for generation of the required data.

Flugzeugbatterien - Teil 2: Anforderungen für Planung und Konstruktion

Batteries d'aéronefs - Partie 2: Exigences de conception et de construction

La CEI 60952-2:2013 définit les exigences de conception, de construction et de matériau des batteries au nickel-cadmium et au plomb d'aéronefs contenant des éléments ou monoblocs ouverts ou à soupape. Les batteries sont utilisées tant pour les usages généraux que pour des applications spécifiques aérospatiales. Cette troisième édition annule et remplace la deuxième édition parue en 2004. Cette nouvelle édition inclut des formats qui peuvent être normalisés au même titre que leurs connecteurs et leurs interfaces électriques.

Letalske baterije - 2. del: Načrtovanje in konstrukcijske zahteve (IEC 60952-2:2013)

Ta del skupine standardov IEC 60952 določa fizično načrtovanje, konstrukcijske in materialne zahteve za nikelj-kadmijeve in svinčeno-kislinske letalske baterije s celicami ali monobloki s prezračevanjem ali z ventilsko regulacijo. Baterije se uporabljajo za splošne namene in za posebno uporabo v aeronavtiki. Posebne teme iz tega dela se uporabljajo pri določitvi sprejemljivih standardov kakovosti, potrebnih za kvalifikacijo baterije kot plovne, kot je opredeljeno v točki 3 standarda IEC 60952-1:2013. Prednostni razponi letalskih baterij so opredeljeni v dodatku A, vendar se lahko ta del skupine standardov IEC 60952 uporablja za druge velikosti, razporeditve in nazivne vrednosti baterij. Za posebne uporabe so lahko predpisane druge zahteve glede načrtovanja. Te se uporabljajo poleg zahtev iz tega dela in so zajete v posameznih dokumentih. Priznava se, da lahko druge organizacije zahtevajo dodatne podatke (nacionalni organi za standarde, AECMA, SAE itd.). Ta standard se lahko uporablja kot okvir za pripravo preskusov za pridobivanje zahtevanih podatkov.

General Information

• Status: Published
• Publication Date: 05-Dec-2013
• ICS: 29.220.20 - Acid secondary cells and batteries
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: ISCB - Secondary cells and batteries
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 25-Nov-2013
• Due Date: 30-Jan-2014
• Completion Date: 06-Dec-2013
• Ref Project: EN 60952-2:2013 - Aircraft batteries - Part 2: Design and construction requirements

Relations

• Replaces: SIST EN 60952-2:2005 - Aircraft batteries -- Part 2: Design and construction requirements
• Effective Date: 06-Dec-2011
• Replaces: SIST EN 60952-2:2005 - Aircraft batteries -- Part 2: Design and construction requirements
• Effective Date: 29-Jan-2023
• Revised: SIST EN 60952-2:2005 - Aircraft batteries -- Part 2: Design and construction requirements
• Effective Date: 06-May-2014

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60952-2:2014
01-januar-2014
1DGRPHãþD
SIST EN 60952-2:2005
/HWDOVNHEDWHULMHGHO1DþUWRYDQMHLQNRQVWUXNFLMVNH]DKWHYH,(&
Aircraft batteries - Part 2: Design and construction requirements
Flugzeugbatterien - Teil 2: Anforderungen für Planung und Konstruktion
Batteries d'aéronefs - Partie 2: Exigences de conception et de construction
Ta slovenski standard je istoveten z: EN 60952-2:2013
ICS:
29.220.20 .LVOLQVNLVHNXQGDUQLþOHQLLQ Acid secondary cells and
EDWHULMH batteries
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
SIST EN 60952-2:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60952-2:2014

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SIST EN 60952-2:2014

EUROPEAN STANDARD
EN 60952-2

NORME EUROPÉENNE
October 2013
EUROPÄISCHE NORM

ICS 29.220.20; 49.060 Supersedes EN 60952-2:2004


English version


Aircraft batteries -
Part 2: Design and construction requirements
(IEC 60952-2:2013)


Batteries d'aéronefs -  Flugzeugbatterien -
Partie 2: Exigences de conception et de Teil 2: Anforderungen für Planung und
construction Konstruktion
(CEI 60952-2:2013) (IEC 60952-2:2013)





This European Standard was approved by CENELEC on 2013-08-13. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
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


© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60952-2:2013 E

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SIST EN 60952-2:2014
EN 60952-2:2013 - 2 -

Foreword
The text of document 21/804/FDIS, future edition 3 of IEC 60952-2, prepared by IEC/TC 21 "Secondary
cells and batteries" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 60952-2:2013.
The following dates are fixed:
(dop) 2014-05-13
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2016-08-13
standards conflicting with the

document have to be withdrawn

This document supersedes EN 60952-2:2004.
EN 60952-2:2013 includes the following significant technical changes with respect to EN 60952-2:2004:
The inclusion of those formats that can be standardized along with their connectors and electrical
interfaces.
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 60952-2:2013 was approved by CENELEC as a European
Standard without any modification.

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SIST EN 60952-2:2014
- 3 - EN 60952-2:2013
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60952-1 2013 Aircraft batteries - EN 60952-1 2013
Part 1: General test requirements and
performance levels

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SIST EN 60952-2:2014

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SIST EN 60952-2:2014



IEC 60952-2

®


Edition 3.0 2013-07




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Aircraft batteries –

Part 2: Design and construction requirements




Batteries d’aéronefs –

Partie 2: Exigences de conception et de construction
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX W


ICS 29.220.20; 49.060 ISBN 978-2-8322-0945-5



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60952-2:2014
– 2 – 60952-2 © IEC:2013
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General construction requirements . 6
4.1 General . 6
4.2 Safety . 7
4.3 Safety philosophy . 7
4.4 Factors influencing safety . 8
4.5 Regulatory information . 8
4.6 Configuration control. 9
4.7 General requirements . 10
4.8 Installation considerations . 10
4.9 Workmanship . 10
5 Electrolytes . 11
5.1 General . 11
5.2 Electrolyte resistance . 11
5.3 Electrolyte level . 11
5.4 Leakage . 11
6 Dissimilar metals . 11
7 Corrosion prevention – Vented nickel-cadmium batteries only. 12
8 Battery containers and components. 12
8.1 General . 12
8.2 Battery containers and covers . 12
8.3 Electrical bonding . 12
8.4 Cell jars and monoblocs . 12
9 Venting arrangements . 12
9.1 Battery requirements . 12
9.2 Cell requirements . 13
9.2.1 Vented filler cap for vented cell . 13
9.2.2 Valve for valve regulated cell . 13
10 Inter-cell connectors for nickel-cadmium batteries . 13
10.1 General . 13
10.2 Special purpose inter-cell connections – non-removable . 14
11 Handles . 14
12 Latches . 14
13 Materials and components for flooded nickel-cadmium batteries . 14
14 Gas barriers and thermal runaway – nickel-cadmium only . 14
15 Dimensions, mass, markings and identification requirements . 15
15.1 Dimensions and mass . 15
15.2 Colour . 15
15.3 Marking . 15
15.3.1 Battery marking . 15
15.3.2 Cell marking . 15
15.3.3 Polarity marking . 16

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SIST EN 60952-2:2014
60952-2 © IEC:2013 – 3 –
16 Heaters – Battery heating system . 16
17 Electrical connectors – Strength of receptacle . 16
18 Temperature monitoring . 16
19 Storage. 17
20 Transportation . 17
21 Disposal and recycling . 17
Annex A (normative) Battery formats . 18
Annex B (normative) Connectors . 31

Figure A.1 – Format A . 18
Figure A.2 – Format B . 19
Figure A.3 – Format C . 20
Figure A.4 – Format D . 21
Figure A.5 – Format E . 22
Figure A.6 – Format F . 23
Figure A.7 – Format G . 24
Figure A.8 – Format H . 25
Figure A.9 – Format I . 26
Figure A.10 – Format J . 27
Figure A.11 – Format K . 28
Figure A.12 – Format L . 29
Figure A.13 – Format M . 30
Figure B.1 – Connector Type A . 32
Figure B.2 – Connector Type B . 33
Figure B.3 – Connector Type C . 34
Figure B.4 – Connector Type Q . 35
Figure B.5 – Connector Type R . 36
Figure B.6 – Connector Type S . 37

Table 1 – Workmanship requirements . 11

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SIST EN 60952-2:2014
– 4 – 60952-2 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

AIRCRAFT BATTERIES –

Part 2: Design and construction requirements

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 60952-2 has been prepared by IEC technical committee 21:
Secondary cells and batteries.
This third edition cancels and replaces the second edition published in 2004. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition: the inclusion of those formats that can be standardized along with their connectors and
electrical interfaces
The text of this standard is based on the following documents:
FDIS Report on voting
21/804/FDIS 21/815/RVD

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SIST EN 60952-2:2014
60952-2 © IEC:2013 – 5 –

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.
A list of all the parts in the IEC 60952 series, published under the general title Aircraft batteries
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 web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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SIST EN 60952-2:2014
– 6 – 60952-2 © IEC:2013
AIRCRAFT BATTERIES –

Part 2: Design and construction requirements



1 Scope
This part of IEC 60952 series defines the physical design, construction and material
requirements for nickel-cadmium and lead-acid aircraft batteries containing vented or valve-
regulated cells or monoblocs. The batteries are used for both general purposes and specific
aerospace applications.
The specific topics addressed in this part serve to establish acceptable quality standards
required to qualify a battery as airworthy as defined in Clause 3 of IEC 60952-1:2013.
A preferred range of aircraft batteries is specified in Annex A, but this part of IEC 60952 series
may be used for other battery sizes, arrangements and ratings. For particular applications,
other design requirements may be stipulated. These will be in addition to the requirements of
this part and will be covered by specific documents.
It is recognised that additional data may be required by other organisations (national standards
bodies, AECMA, SAE, etc.). The present standard can be used as a framework to devise tests
for generation of the required data.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
IEC 60952-1:2013, Aircraft batteries – Part 1: General test requirements and performance
levels
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60952-1:2013 apply.
4 General construction requirements
4.1 General
Batteries complying with this standard shall be capable of meeting the requirements of
IEC 60952-1 upon commissioning in accordance with manufacturer instructions or as specified
in the product specification. Batteries designed for utilisation in the aerospace environment
shall be sufficiently robust and shall withstand the rigors of normal application, handling,
manoeuvres and the full range of operating conditions permitted for the aircraft concerned.
Proper integration of nickel-cadmium, and lead-acid batteries into aviation-related equipment
requires cooperation between the battery supplier, aircraft designer, and the avionic equipment
designer. Only through this cooperative exchange of the aircraft performance requirements and
the battery's capabilities and limitations can an effective pairing of aircraft, avionics equipment
and battery be realised.

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SIST EN 60952-2:2014
60952-2 © IEC:2013 – 7 –
Overall, the stated requirements and guidelines contained in this document are generic in
nature, and serve only as a baseline for the design and test for specific battery and equipment
pairings.
Below are general requirements pertinent to the safety, quality control, configuration control,
qualification, storage, shipping, and disposal of nickel-cadmium, nickel metal-hydride, and
lead-acid aircraft batteries.
4.2 Safety
Safety is the prime consideration in the use of nickel-cadmium, and lead acid batteries on
aircrafts. The training of installers, end users and personnel involved in the assembly,
handling, installation, maintenance and disposal of nickel-cadmium, nickel metal hydride, and
lead-acid batteries with respect to their special characteristics is a necessary safety element.
Extreme care shall be taken in the handling, shipping, and storage of nickel-cadmium, nickel
metal-hydride, and lead-acid aircraft batteries. Safety concerns include the possibility of fire,
explosion, and corrosive nature of the electrolyte and the venting of toxic or flammable gases.
The battery shall be constructed so as to avoid the occurrence of short-circuiting of the battery
and its components.
Terminals of batteries should be covered with non-conductive protection to avoid possibility of
shorting during handling, shipping, and storage.
The battery shall be constructed such that there will be no ignition source inside the battery
sufficient to cause ignition of hydrogen/oxygen mixtures in the event of failure of the venting
system. All auxiliary equipment such as thermal sensors, thermostats, heaters and switching
devices shall be so designed that they cannot be the source of an explosion. The current-
carrying components of the battery shall be dimensioned and constructed so as to provide no
ignition source under any external short circuit conditions.
The battery shall be so constructed that any debris due to any internal explosion failure shall be
contained within the casing.
The battery should be constructed of materials that, in the absence of externally supplied
energy, will not support combustion.
4.3 Safety philosophy
Aircraft designers must ensure that operational parameters and the environment in which the
battery is to be used are not more severe than that to which it has been designed and tested.
Operation at discharge rates and temperatures exceeding design limits, improper maintenance,
and improper storage may result in dangerous battery failure. Additionally, the improper
application of batteries may compromise the safety of the aircraft by it not being capable of
delivering adequate power during an emergency to support aircraft essential loads for the
design duration.
Nickel-cadmium, nickel metal-hydride, and lead-acid batteries and the aircraft equipment for
which they are the power source must be designed such that no single failure in either can
cause a safety hazard to the passengers or crew of the aircraft.

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SIST EN 60952-2:2014
– 8 – 60952-2 © IEC:2013
4.4 Factors influencing safety
The battery application and design should be such to avoid the occurrence of short-circuiting of
the battery and its components. The battery shall be constructed to minimise ignition sources
inside the battery. The battery should be constructed of self-extinguishing materials.
Installers and users of nickel-cadmium, nickel metal-hydride, and lead-acid batteries must be
informed that cells and batteries other than those authorized/approved for a particular
application shall not be substituted even though they may be of the same physical dimensions,
capacity, and voltage.
Safe use of nickel-cadmium, nickel metal-hydride, and lead-acid batteries involves more than
battery selection and testing. Other design and operation factors can have a similar impact on
safe use. For example:
a) Multiple batteries – In general, the use of a single battery is preferred over the use of a
number of batteries in series and/or parallel. However, in many aircraft applications due to
either handling requirements (weight) or space restriction, separation into more than one
battery case may be necessary.
b) Mixing of cells or batteries – Mixing of cells or batteries from different manufacturers is not
an acceptable practice. Cells or batteries of different capacities in series connection will
result in the lower capacity battery(ies) being driven into deep discharge (forced discharge).
Cells or batteries may have different capacities on account of their differences in design,
manufacturing process, storage, use, age or history. Therefore, mixing cells or batteries
with different part numbers, made by different manufacturers or from different sources,
shall not be allowed. Refer to the OEM maintenance manuals for proper replacement of
each manufacturer's cells within a battery.
c) Battery polarity – Installing one or more batteries incorrectly, with the battery output
terminals reversed, will result in the reversed battery being charged by other batteries in the
circuit during discharge and discharged by the charging system during charge.
d) Exposed terminals – Batteries should be designed and/or packaged in such a way as to
prevent short circuits, and assure proper battery installation. Leaving battery output
terminals or leads exposed may result in external short-circuiting of the battery during
shipping, handling, testing and installation. Terminals of batteries should be covered with
non-conductive protective device to avoid any possibility of shorting during handling,
shipping, and storage. Aircraft vibration and/or contact oxidation may result in poor
electrical connections. Proper connector design and maintenance procedures are
necessary.
e) High terminal voltage – Batteries supplying 50 V or above present a personal safety hazard
due to the possibility of lethal shock and shall be labelled to clearly indicate the hazard.
1
4.5 Regulatory information
Regulation of equipment installed in aircraft, and component parts of that equipment, are the
responsibility of the Federal Aviation Administration (FAA) and the European Aviation Safety
Agency (EASA). In the case of equipment installed in aircraft at the time of manufacture of the
aircraft, the aircraft's Type Certificate (TC) specifies the approved aircraft type design including
any battery equipment. Amendments, Supplemental Type Certificates (STC) and Part
Manufacturer Approval (PMA) may be approved subsequent to the original issue of a TC. It is
also possible to obtain FAA regional or field approval for modification or addition of equipment
mounted in aircraft. It is to note that although PMA is
...