SIST EN IEC 62984-1:2021

SLOVENSKI STANDARD
01-februar-2021
Visokotemperaturne sekundarne baterije - 1. del: Splošni vidiki, definicije in
preskusi
High temperature secondary batteries - Part 1: General aspects, definitions and tests
Batteries d'accumulateur à haute temperature - Partie 1: Aspects généraux, définitions et
essais
Ta slovenski standard je istoveten z: EN IEC 62984-1:2020
ICS:
29.220.20 Kislinski sekundarni členi in Acid secondary cells and
baterije batteries
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62984-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 29.220.20
English Version
High-temperature secondary batteries - Part 1: General
requirements
(IEC 62984-1:2020)
Batteries d'accumulateurs à haute température - Partie 1: Hochtemperatur-Sekundärbatterien - Teil 1: Allgemeine
Exigences générales Anforderungen
(IEC 62984-1:2020) (IEC 62984-1:2020)
This European Standard was approved by CENELEC on 2020-04-15. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62984-1:2020 E

European foreword
The text of document 21/1031/FDIS, future edition 1 of IEC 62984-1, prepared by IEC/TC 21
"Secondary cells and batteries" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62984-1:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-01-15
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-04-15
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 62984-1:2020 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 60721-3-2:2018 NOTE Harmonized as EN IEC 60721-3-2:2018 (not modified)
IEC 60952 (series) NOTE Harmonized as EN 60952 (series)
IEC 61427-2:2015 NOTE Harmonized as EN 61427-2:2015 (not modified)
IEC 61982 (series) NOTE Harmonized as EN 61982 (series)
IEC 62485-2 NOTE Harmonized as EN IEC 62485-2
CISPR 11 NOTE Harmonized as EN 55011

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
IEC 60068-2-1 2007 Environmental testing - Part 2-1: Tests - EN 60068-2-1 2007
Test A: Cold
IEC 60068-2-2 2007 Environmental testing - Part 2-2: Tests - EN 60068-2-2 2007
Test B: Dry heat
IEC 60068-2-30 2005 Environmental testing - Part 2-30: Tests - EN 60068-2-30 2005
Test Db: Damp heat, cyclic (12 h + 12 h
cycle)
IEC 60068-2-52 2017 Environmental testing - Part 2-52: Tests - EN IEC 60068-2-52 2018
Test Kb: Salt mist, cyclic (sodium chloride
solution)
IEC 60068-2-64 2008 Environmental testing - Part 2-64: Tests - EN 60068-2-64 2008
Test Fh: Vibration, broadband random and
guidance
IEC 60068-2-75 2014 Environmental testing - Part 2-75: Tests - EN 60068-2-75 2014
Test Eh: Hammer tests
IEC 60068-2-78 - Environmental testing - Part 2-78: Tests - EN 60068-2-78 -
Test Cab: Damp heat, steady state
IEC 60529 - Degrees of protection provided by - -
enclosures (IP Code)
IEC 61000-4-2 - Electromagnetic compatibility (EMC) - Part EN 61000-4-2 -
4-2: Testing and measurement techniques
- Electrostatic discharge immunity test
IEC 61000-4-3 - Electromagnetic compatibility (EMC) - Part - -
4-3: Testing and measurement techniques
- Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-4 - Electromagnetic compatibility (EMC) - Part EN 61000-4-4 -
4-4: Testing and measurement techniques
- Electrical fast transient/burst immunity
test
IEC 61000-4-5 - Electromagnetic compatibility (EMC) - Part EN 61000-4-5 -
4-5: Testing and measurement techniques
- Surge immunity test
IEC 61000-4-6 - Electromagnetic compatibility (EMC) - Part EN 61000-4-6 -
4-6: Testing and measurement techniques
- Immunity to conducted disturbances,
induced by radio-frequency fields
IEC 61000-4-11 - Electromagnetic compatibility (EMC) - Part EN IEC 61000-4-11 -
4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests for equipment with input
current up to 16 A per phase
IEC 61000-4-29 - Electromagnetic compatibility (EMC) - Part EN 61000-4-29 -
4-29: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations on d.c.
input power port immunity tests
IEC 61000-4-34 - Electromagnetic compatibility (EMC) - Part EN 61000-4-34 -
4-34: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests for equipment with input
current more than 16 A per phase
IEC 61000-6-3 - Electromagnetic compatibility (EMC) - Part EN 61000-6-3 -
6-3: Generic standards - Emission
standard for residential, commercial and
light-industrial environments
IEC 61000-6-4 - Electromagnetic compatibility (EMC) - Part EN IEC 61000-6-4 -
6-4: Generic standards - Emission
standard for industrial environments
IEC 61373 - Railway applications - Rolling stock EN 61373 -
equipment - Shock and vibration tests
IEC 62236-3-2 - Railway applications - Electromagnetic - -
compatibility - Part 3-2: Rolling stock -
Apparatus
IEC 62262 - Degrees of protection provided by EN 62262 -
enclosures for electrical equipment against
external mechanical impacts (IK code)
CISPR 25 - Vehicles, boats and internal combustion - -
engines - Radio disturbance characteristics
- Limits and methods of measurement for
the protection of on-board receivers

IEC 62984-1 ®
Edition 1.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-temperature secondary batteries –

Part 1: General requirements
Batteries d'accumulateurs à haute température –

Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20 ISBN 978-2-8322-7922-9

– 2 – IEC 62984-1:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, symbols and abbreviated terms . 7
3.1 Battery construction . 7
3.2 Battery functionality . 10
3.3 Symbols and abbreviated terms . 12
4 Environmental (service) conditions . 13
4.1 General . 13
4.2 Normal service conditions for stationary installations . 13
4.2.1 General . 13
4.2.2 Additional normal environmental conditions for indoor installations . 14
4.2.3 Additional normal environmental conditions for outdoor installations . 14
4.3 Special service conditions for stationary installations . 14
4.3.1 General . 14
4.3.2 Additional special service conditions for indoor installations . 14
4.3.3 Additional special service conditions for outdoor installations . 14
4.4 Normal service conditions for mobile installations (except propulsion). 14
4.5 Special service conditions for mobile installations (except propulsion) . 14
5 Design and requirements . 15
5.1 Battery architecture . 15
5.1.1 Module . 15
5.1.2 Battery . 15
5.1.3 Assembly of batteries . 16
5.1.4 Thermal management subsystem . 17
5.2 Mechanical requirements . 17
5.2.1 General . 17
5.2.2 Battery enclosure. 17
5.2.3 Vibration . 18
5.2.4 Mechanical impact . 18
5.3 Environmental requirements . 18
5.4 EMC requirements . 18
6 Tests . 19
6.1 General . 19
6.1.1 Classification of tests . 19
6.1.2 Test object selection . 19
6.1.3 DUT initial conditions before tests . 20
6.1.4 Measuring equipment . 20
6.2 List of tests . 20
6.3 Type tests . 21
6.3.1 Mechanical tests . 21
6.3.2 Environmental tests . 23
6.3.3 EMC tests . 24
6.4 Routine tests. 33
6.5 Special tests . 33
7 Markings. 33

IEC 62984-1:2020 © IEC 2020 – 3 –
7.1 General . 33
7.2 Data plate marking . 33
8 Rules for transportation, installation and maintenance . 33
8.1 Transportation . 33
8.2 Installation . 33
8.3 Maintenance . 33
9 Documentation . 33
9.1 Instruction manual . 33
9.2 Test report . 34
Bibliography . 35

Figure 1 – Components of a battery . 16
Figure 2 – Components of an assembly of batteries . 16
Figure 3 – Thermal management subsystem . 17

Table 1 – List of symbols and abbreviated terms . 13
Table 2 – Electromagnetic environments . 19
Table 3 – Type tests . 21
Table 4 – Damp heat test – Steady state . 23
Table 5 – EMC tests severity level . 25
Table 6 – Assessment criteria description for immunity tests. 26
Table 7 – EFT/Burst test parameters . 28
Table 8 – Surge test levels . 29

– 4 – IEC 62984-1:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-TEMPERATURE SECONDARY BATTERIES –

Part 1: General 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 62984-1 has been prepared by IEC technical committee 21:
Secondary cells and batteries.
The text of this International Standard is based on the following documents:
FDIS Report on voting
21/1031/FDIS 21/1041/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 parts in the IEC 62984 series, published under the general title High-temperature
secondary batteries, can be found on the IEC website.

IEC 62984-1:2020 © IEC 2020 – 5 –
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.
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.

– 6 – IEC 62984-1:2020 © IEC 2020
HIGH-TEMPERATURE SECONDARY BATTERIES –

Part 1: General requirements
1 Scope
This part of IEC 62984 specifies general aspects, definitions and tests for high-temperature
secondary batteries for mobile and/or stationary use and whose nominal voltage does not
exceed 1 500 V.
This document does not cover aircraft batteries, which are covered by IEC 60952 (all parts), or
batteries for the propulsion of electric road vehicles, covered by IEC 61982 (all parts).
NOTE High-temperature batteries are electrochemical systems whose cells’ internal minimum operating
temperature is above 100 °C.
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 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60068-2-52:2017, Environmental testing – Part 2-52: Tests – Test Kb: Salt mist, cyclic
(sodium chloride solution)
IEC 60068-2-64:2008, Environmental testing – Part 2-64: Tests – Test Fh: Vibration, broadband
random and guidance
IEC 60068-2-75:2014, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test

IEC 62984-1:2020 © IEC 2020 – 7 –
IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement
techniques – Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-11, Electromagnetic compatibility (EMC) – Part 4-11: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations immunity tests
IEC 61000-4-29, Electromagnetic compatibility (EMC) – Part 4-29: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations on d.c. input power port
immunity tests
IEC 61000-4-34, Electromagnetic compatibility (EMC) – Part 4-34: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations immunity tests for
equipment with mains current more than 16 A per phase
IEC 61000-6-3, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards – Emission
standard for residential, commercial and light-industrial environments
IEC 61000-6-4, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards – Emission
standard for industrial environments
IEC 61373, Railway applications – Rolling stock equipment – Shock and vibration tests
IEC 62236-3-2, Railway applications – Electromagnetic compatibility – Part 3-2: Rolling stock
– Apparatus
IEC 62262, Degrees of protection provided by enclosures for electrical equipment against
external mechanical impacts (IK code)
CISPR 25, Vehicles, boats and internal combustion engines – Radio disturbance characteristics
– Limits and methods of measurement for the protection of on-board receivers
3 Terms, definitions, symbols and abbreviated terms
For the purposes of this document, the following terms and definitions 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
3.1 Battery construction
3.1.1
cell
basic functional unit, consisting of an assembly of electrodes, electrolyte, container, terminals
and usually separators, that is a source of electric energy obtained by direct conversion of
chemical energy
Note 1 to entry: See primary cell and secondary cell.
[SOURCE: IEC 60050-482:2004, 482-01-01]
3.1.2
secondary cell
cell which is designed to be electrically recharged

– 8 – IEC 62984-1:2020 © IEC 2020
Note 1 to entry: The recharge is accomplished by way of a reversible chemical reaction.
[SOURCE: IEC 60050-482:2004, 482-01-03]
3.1.3
module
standardized and interchangeable assembly of cells connected in series and/or parallel and
associated hardware designed for easy assembly into a commercial battery
[SOURCE: IEC 61427-2:2015, 3.29]
3.1.4
battery
one or more cells fitted with devices necessary for use, for example case, terminals, marking
and protective devices
[SOURCE: IEC 60050-482:2004, 482-01-04]
3.1.5
high-temperature battery
battery whose cells' internal minimum operating temperature is above 100 °C
Note 1 to entry: A high-temperature battery is inactive when the cells are at room temperature or lower.
3.1.6
(cell) electrode
electrode, electrically connected to one terminal of a cell, in electric contact with the electrolyte
of that cell and on which the electrode reaction occurs
Note 1 to entry: For "electrode", see IEC 60050-151:2001, 151-13-01.
Note 2 to entry: The active material may be part of the electrode.
[SOURCE: IEC 60050-482:2004, 482-02-21]
3.1.7
terminal
conductive part of a device, electric circuit or electric network, provided for connecting that
device, electric circuit or electric network to one or more external conductors
[SOURCE: IEC 60050-482:2004, 482-02-22]
3.1.8
negative terminal
accessible conductive part provided for the connection of an external electric circuit to the
negative electrode of the cell
[SOURCE: IEC 60050-482:2004, 482-02-24]
3.1.9
positive terminal
accessible conductive part provided for the connection of an external electric circuit to the
positive electrode of the cell
[SOURCE: IEC 60050-482:2004, 482-02-25]
3.1.10
electrolyte
liquid or solid substance containing mobile ions which render it ionically conductive

IEC 62984-1:2020 © IEC 2020 – 9 –
[SOURCE: IEC 60050-482:2004, 482-02-29, modified – The note has been omitted.]
3.1.11
active material
material which reacts chemically to produce electric energy when the cell discharges
Note 1 to entry: In secondary cells, the active material is restored to its original state during charge.
[SOURCE: IEC 60050-482:2004, 482-02-33]
3.1.12
enclosure
housing affording the type and degree of protection suitable for the intended application
[SOURCE: IEC 60050-195:1998, 195-02-35]
3.1.13
electrochemical reaction
chemical reaction involving oxidation or reduction of chemical components with a transfer of
electrons to or from the active material
Note 1 to entry: The electrode reaction can also involve other chemical reactions including subreactions on a cell
electrode.
[SOURCE: IEC 60050-482:2004, 482-03-01]
3.1.14
parallel connection (related to cells or batteries)
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]
3.1.15
parallel series connection (related to cells or batteries)
arrangement of cells or batteries wherein parallel connected cells or batteries are connected in
series
[SOURCE: IEC 60050-482:2004, 482-03-40]
3.1.16
series connection (related to cells or batteries)
arrangement of cells or batteries wherein the positive terminal of each cell or battery is
connected to the negative terminal of the next cell or battery in sequence
[SOURCE: IEC 60050-482:2004, 482-03-41]
3.1.17
series parallel connection (related to cells or batteries)
arrangement of cells or batteries wherein in series connected cells or batteries are connected
in parallel
[SOURCE: IEC 60050-482:2004, 482-03-42]
3.1.18
assembly of batteries
battery arrangement
cluster of several batteries, connected in parallel and in series

– 10 – IEC 62984-1:2020 © IEC 2020
3.1.19
battery management system
BMS
electronic system associated with a battery which monitors and/or manages its state, calculates
secondary data, reports that data and/or controls its environment to influence the battery’s
performance and/or service life
Note 1 to entry: The function of the battery management system can be fully or partially assigned to the battery
pack and/or to equipment that uses this battery.
Note 2 to entry: A battery management system is also called a "battery management unit" (BMU).
Note 3 to entry: This note applies to the French language only.
3.1.20
battery support system
BSS
system which supports a battery and which includes functions, such as communication, fire
prevention, electrical protection and control, air conditioning, anti-intrusion sensors, etc.
Note 1 to entry: This note applies to the French language only.
3.2 Battery functionality
3.2.1
capacity (for cells or batteries)
electric charge which a cell or battery can deliver under specified discharge conditions
Note 1 to entry: The SI unit for electric charge, or quantity of electricity, is the coulomb (1 C = 1 A∙s) but in practice,
capacity is usually expressed in ampere hours (A∙h).
[SOURCE: IEC 60050-482:2004, 482-03-14]
3.2.2
rated capacity
C
r
capacity value of a battery determined under specified conditions and declared by the
manufacturer
[SOURCE: IEC 60050-482:2004, 482-03-15, modified – The symbol has been added.]
3.2.3
battery energy
electric energy which a battery delivers under specified conditions
Note 1 to entry: The SI unit for energy is joule (1 J = 1 W·s), but in practice, battery energy is usually expressed in
watthours (W∙h) (1 W∙h = 3 600 J).
[SOURCE: IEC 60050-482:2004, 482-03-21]
3.2.4
discharge (of a battery)
operation by which a battery delivers, to an external electric circuit and under specified
conditions, electric energy produced in the cells
[SOURCE: IEC 60050-482:2004, 482-03-23]
3.2.5
discharge current
electric current delivered by a battery during its discharge

IEC 62984-1:2020 © IEC 2020 – 11 –
[SOURCE: IEC 60050-482:2004, 482-03-24]
3.2.6
discharge rate
electric current at which a battery is discharged
Note 1 to entry: The discharge rate is calculated as the rated capacity divided by the corresponding discharge time
which results in an electric current.
[SOURCE: IEC 60050-482:2004, 482-03-25]
3.2.7
nominal value
value of a quantity used to designate and identify a component, device, equipment, or system
[SOURCE: IEC 60050-482:2004, 482-03-43, modified – The note has been omitted.]
3.2.8
nominal voltage
U
n
suitable approximate value of the voltage used to designate or identify a cell, a battery or an
electrochemical system
[SOURCE: IEC 60050-482:2004, 482-03-31, modified – The symbol has been added.]
3.2.9
service life
total period of useful life of a cell or a battery in operation
Note 1 to entry: For primary batteries, service life relates to the total discharge time or capacity under specific
conditions.
Note 2 to entry: For secondary cells and batteries, the service life may be expressed in time, number of
charge/discharge cycles, or capacity in ampere hours (Ah).
[SOURCE: IEC 60050-482:2004, 482-03-46]
3.2.10
charging of a battery
operation during which a secondary cell or battery is supplied with electric energy from an
external circuit which results in chemical changes within the cell and thus the storage of energy
as chemical energy
[SOURCE: IEC 60050-482:2004, 482-05-27]
3.2.11
full charge
state of charge wherein all available active material is in a state such that the charging under
the selected conditions produces no significant increase of capacity
[SOURCE: IEC 60050-482:2004, 482-05-42]
3.2.12
charge rate (relating to secondary cells and batteries)
I
t
electric current at which a secondary cell or battery is charged
Note 1 to entry: The charge rate is expressed as the reference current I = C /n where C is the rated capacity
t r r
declared by the manufacturer and n is the time base in hours for which the rated capacity is declared.

– 12 – IEC 62984-1:2020 © IEC 2020
[SOURCE: IEC 60050-482:2004, 482-05-45, modified – The symbol has been added.]
3.2.13
state of charge
SOC
ratio of the actual electric charge available in a battery and the electric charge in fully charged
state
Note 1 to entry: This note applies to the French language only.
3.2.14
standby state
state in which the battery does not actually charge or discharge but is immediately ready to
operate
Note 1 to entry: Content based on IEC 60050-192:2015, 192-02-12.
3.2.15
idle state
non-operating up state during non-required time
Note 1 to entry: The adjective "idle" designates an item in an idle state.
Note 2 to entry: In some applications, an item in an idle state has some functioning subsystems, and is therefore
considered to be operating.
Note 3 to entry: The idle state is related to charge/discharge of the battery and therefore a high-temperature
secondary battery is in an idle state when it is within its operating temperature range but cannot charge or discharge.
[SOURCE: IEC 60050-192: 2015, 192-02-14, modified – " and the deprecated term
"free state" have been deleted from the term and Note 3 has been added.]
3.3 Symbols and abbreviated terms
The list of symbols and abbreviated terms is given in Table 1.

IEC 62984-1:2020 © IEC 2020 – 13 –
Table 1 – List of symbols and abbreviated terms
Symbol / Abbreviated term Full term Reference
AM Amplitude modulation
BMS Battery management system See 3.1.19
BSS Battery support system See 3.1.20
C
Rated capacity See 3.2.2
r
CDN Coupling decoupling network
DUT Device under test
EESS Electrical energy storage system
EFT Electrical fast transient
EMC Electromagnetic compatibility
ESD Electrostatic discharge
I
Charge rate See 3.2.12
t
PCS Power conversion system
SOC State of charge See 3.2.13
TDMA Time division multiple access
U
Nominal voltage See 3.2.8
n
UFA Uniform field area
4 Environmental (service) conditions
4.1 General
In high-temperature secondary batteries, cells are kept at high temperature and enclosed within
a thermal insulated enclosure. These batteries are therefore relatively insensitive to external
ambient temperature.
However auxiliary parts such as temperature controllers, BMS etc., are not operating at high
temperature and are therefore impacted by environmental conditions, which have to be taken
into account.
Unless otherwise specified, high-temperature batteries are intended to be used at their rated
characteristics under the normal environmental conditions listed in 4.2 or 4.4.
If the actual service conditions differ from these normal service conditions, high-temperature
batteries will be designed to comply with the special service conditions listed in 4.3 or 4.5.
4.2 Normal service conditions for stationary installations
4.2.1 General
– Altitude: height above sea-level not exceeding 1 000 m
– Vibrations: vibrations during normal operation may be neglected; however
vibrations occurring during transportation shall be taken into account.
– Humidity: RH ≤ 95 %, non-condensing

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4.2.2 Additional normal environmental conditions for indoor installations
– Temperature range: −5 °C to 40 °C
– Solar radiation: may be neglected
– Pollution: not significant
4.2.3 Additional normal environmental conditions for outdoor installations
– Temperature range: −20 °C to 40 °C
– Solar radiation: up to 1 000 W/m
– Pollution: the air may be polluted by dust, smoke, vapours or light salt mist
– Moisture: condensation or precipitation may occur
– Ice coating: < 20 mm
4.3 Special service conditions for stationary installations
4.3.1 General
– Altitude: height above sea-level not exceeding 2 000 m
– Vibrations: vibrations during normal operation may be neglected; however vibrations
occurring during transportation shall be taken into account.
– Humidity: RH ≤ 98 %, condensing
– Pollution: not significant
4.3.2 Additional special service conditions for indoor installations
– Temperature range: −15 °C to 50 °C
– Solar radiation: may be neglected
– Pollution: not significant
4.3.3 Additional special service conditions for outdoor installations
– Temperature range: −15 °C to 50 °C or −40 °C to 40 °C
– Solar radiation: up to 1 180 W/m
– Pollution: the air may be polluted by dust, smoke or vapour.
– Moisture: condensation or precipitation may occur
– Ice coating: < 40 mm
– For coastal or offshore installations, the presence of salt mist shall be taken into account.
4.4 Normal service conditions for mobile installations (except propulsion)
– On-board mounting not exposed to weather conditions
– Temperature range: −15 °C to +55 °C
– Solar radiation: may be neglected
– Altitude: height above sea-level not exceeding 1 000 m
– Vibrations: non-negligible vibrations during normal operation shall be taken into
account
– Humidity: RH ≤ 95 %, non-condensing
4.5 Special service conditions for mobile installations (except propulsion)
– On-board mount exposed to sun and/or rain
– Temperature range: −25 °C to +70 °C
– Solar radiation: up to 1 180 W/m
– Altitude: height above sea-level not exceeding 3 000 m

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– Vibrations: non-negligible vibrations during normal operation shall be taken into
account
– Humidity: RH ≤ 98 %, condensing
– Moisture: condensation or precipitation may occur
– Pollution: the air may be polluted by dust, smoke or vapour
– For coastal or ship environments, the presence of salt mist shall be taken into account.
5 Design and requirements
5.1 Battery architecture
5.1.1 Module
High-temperature batteries are normally constructed with multiple cells connected together,
which are assembled with suitable heaters, coolers (if necessary), temperature sensors, etc.,
and contained inside thermally insulated housings. This arrangement is called a "module".
The modular structure is often used due to the wide use of high-temperature batteries for energy
storage applications. Such applications require high capacities and relatively high system
voltages, so the modular structure is fairly common.
A module cannot be used as it is because it contains cells and other components such as
sensors, heaters and coolers but may be missing the logic controls and components needed
for proper operation.
5.1.2 Battery
A battery is composed (see Figure 1) of one or more modules connected together and controlled
by a suitable battery management system (BMS) which provides all the electronic controls
necessary to ensure optimal management of the cells and prevent operation outside reliable
conditions.
A battery is thus necessarily composed of at least a BMS and one or more modules.

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Figure 1 – Components of a battery
5.1.3 Assembly of batteries
Assemblies of batteries, such as those used in electrical energy storage systems (EESS), are
composed of several batteries, connected in parallel and/or in series and all the auxiliary
systems necessary to manage the whole system, often called the battery support system (BSS),
see Figure 2.
Figure 2 – Components of an assembly of batteries
The battery support system (BSS) may include, for example, functions such as communication,
fire prevention, electrical protection and control, air conditioning, anti-intrusion sensors, etc.

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In energy storage applications, battery assemblies are typically connected to a power
conditioning system (PCS) which in turn is connected to the grid.
5.1.4 Thermal management subsystem
The specific feature of high-temperature batteries is that they can work only when the internal
temperature of the cells is within the (relatively high) specified operating temperature range, in
which the relevant active materials are in the fused state.
An essential part of this type of battery is therefore the temperature management subsystem,
which forms part of the BMS. A typical structure of such a thermal management subsystem is
depicted in Figure 3.
Figure 3 – Thermal management subsystem
5.2 Mechanical requirements
5.2.1 General
The enclosure and support structures shall be resistant to the deteriorating effects in the
environment in which they are installed, including the effects of water exposure, ultraviolet (UV)
exposure, temperature extremes, corrosion and mechanical impacts and stresses, as applicable
to the installation. Batteries intended for installation in seismic zones shall be designed and
rated for the particular intended zone as noted in the installation
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