Flow Battery Systems for Stationary applications - Part 2-2: Safety requirements

This part of IEC 62932 applies to flow battery systems for stationary applications and their
installations with a maximum voltage not exceeding 1 500 V DC in compliance with
IEC 62932-1.
This document defines the requirements and test methods for risk reduction and protection
measures against significant hazards relevant to flow battery systems, to persons, property and
the environment, or to a combination of them.
This document is applicable to stationary flow battery systems intended for indoor and outdoor
commercial and industrial use in non-hazardous (unclassified) areas.
This document covers significant hazards, hazardous situations and events, with the exception
of those associated with natural disaster, relevant to flow battery systems, when they are used
as intended and under the conditions foreseen by the manufacturer including reasonably
foreseeable misuse thereof.
The requirements described in this document are not intended to constrain innovations. When
considering fluids, materials, designs or constructions not specifically dealt with in this
document, these alternatives are evaluated as to their ability to yield levels of safety equivalent
to those specified in this document.

Flussbatterie-Systeme für stationäre Anwendungen – Teil 2-2: Sicherheitsanforderungen

Systèmes de production d’énergie de batteries d’accumulateurs à circulation d'électrolyte pour applications stationnaires – Partie 2-2: Exigences de sécurité

L’IEC 62932-2-2:2020 s’applique aux systèmes de batteries d’accumulateurs à circulation d’électrolyte pour les applications stationnaires et à leurs installations avec une tension maximale ne dépassant pas 1 500 V en courant continu conformément à l’IEC 62932-1. Le présent document définit les exigences et les méthodes d’essai pour la réduction du risque, ainsi que les mesures de protection contre les dangers significatifs, concernant les systèmes de batteries d’accumulateurs à circulation d’électrolyte, les personnes, les biens et l’environnement, ou une combinaison de ces facteurs. Le présent document est applicable aux systèmes de batteries d’accumulateurs à circulation d’électrolyte stationnaires destinés à une utilisation commerciale et industrielle à l’intérieur et à l’extérieur dans des emplacements (non classés) non dangereux. Le présent document couvre les dangers, ainsi que les situations et événements dangereux significatifs, à l’exception de ceux associés à une catastrophe naturelle, concernant les systèmes de batteries d’accumulateurs à circulation d’électrolyte, lorsqu’ils sont utilisés tel que prévu et dans les conditions prévues par le fabricant, y compris leur mauvaise utilisation raisonnablement prévisible. Les exigences décrites dans le présent document ne sont pas destinées à limiter les innovations. La prise en compte des fluides, matériaux, conceptions ou constructions dont le présent document ne traite pas particulièrement évalue ces variantes quant à leur capacité à produire des niveaux de sécurité équivalant à ceux spécifiés dans le présent document.

Sistemi pretočnih baterij za vgrajeno opremo - 2-2. del: Varnostne zahteve

General Information

Status
Published
Publication Date
28-May-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
18-May-2020
Due Date
23-Jul-2020
Completion Date
29-May-2020

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SLOVENSKI STANDARD
SIST EN IEC 62932-2-2:2020
01-julij-2020
Sistemi pretočnih baterij za vgrajeno opremo - 2-2. del: Varnostne zahteve
Flow Battery Systems for Stationary applications - Part 2-2: Safety requirements
Ta slovenski standard je istoveten z: EN IEC 62932-2-2:2020
ICS:
29.220.99 Drugi členi in baterije Other cells and batteries
SIST EN IEC 62932-2-2:2020 en

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

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SIST EN IEC 62932-2-2:2020
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SIST EN IEC 62932-2-2:2020
EUROPEAN STANDARD EN IEC 62932-2-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2020
ICS 29.220.99
English Version
Flow battery energy systems for stationary applications - Part 2-
2: Safety requirements
(IEC 62932-2-2:2020)

Systèmes de production d’énergie de batteries Flussbatterie-Systeme für stationäre Anwendungen - Teil 2-

d’accumulateurs à circulation d'électrolyte pour applications 2: Sicherheitsanforderungen

stationnaires - Partie 2-2: Exigences de sécurité (IEC 62932-2-2:2020)
(IEC 62932-2-2:2020)

This European Standard was approved by CENELEC on 2020-03-24. 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 62932-2-2:2020 E
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SIST EN IEC 62932-2-2:2020
EN IEC 62932-2-2:2020 (E)
European foreword

The text of document 21/1029/FDIS, future edition 1 of IEC 62932-2-2, prepared by IEC/TC 21

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

CENELEC as EN IEC 62932-2-2:2020.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2020-12-24

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-03-24

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 62932-2-2:2020 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 60529 NOTE Harmonized as EN 60529
IEC 60664-1 NOTE Harmonized as EN 60664-1
IEC 60721-3-2 NOTE Harmonized as EN IEC 60721-3-2
IEC 60812 NOTE Harmonized as EN IEC 60812
IEC 60900 NOTE Harmonized as EN IEC 60900
IEC 61000 (series) NOTE Harmonized as EN 61000 (series)
IEC 61025 NOTE Harmonized as EN 61025
IEC 61660-1 NOTE Harmonized as EN 61660-1
IEC 61660-2 NOTE Harmonized as EN 61660-2
IEC 61936-1 NOTE Harmonized as EN 61936-1
IEC 62282-3-100 NOTE Harmonized as EN 62282-3-100
IEC 62282-3-300 NOTE Harmonized as EN 62282-3-300
IEC 62351 (series) NOTE Harmonized as EN 62351 (series)
IEC 62477-1 NOTE Harmonized as EN 62477-1
IEC 62932-2-1 NOTE Harmonized as EN IEC 62932-2-1
ISO 13850 NOTE Harmonized as EN ISO 13850
To be published. Stage at the time of publication: FprEN IEC 62932-2-1:2019.
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SIST EN IEC 62932-2-2:2020
EN IEC 62932-2-2:2020 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60079-10-1 - Explosive atmospheres - Part 10-1: EN 60079-10-1 -
Classification of areas - Explosive gas
atmospheres

IEC 60364-4-41 - Low-voltage electrical installations - Part 4-41: HD 60364-4-41 -

Protection for safety - Protection against
electric shock

IEC 60364-4-43 - Low-voltage electrical installations - Part 4-43: HD 60364-4-43 -

Protection for safety - Protection against
overcurrent
IEC 60364-6 - Low voltage electrical installations - Part 6: HD 60364-6 -
Verification
IEC 61936-1 - Power installations exceeding 1 kV a.c. - Part EN 61936-1 -
1: Common rules
IEC 62485-2 2010 Safety requirements for secondary batteries EN IEC 62485-2 2018
and battery installations - Part 2: Stationary
batteries
IEC 62932-1 - Flow battery energy systems for stationary - -
applications - Part 1: Terminology and general
aspects
ISO 7010 - Graphical symbols - Safety colours and safety - -
signs - Registered safety signs
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SIST EN IEC 62932-2-2:2020
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SIST EN IEC 62932-2-2:2020
IEC 62932-2-2
Edition 1.0 2020-02
INTERNATIONAL
STANDARD
Flow battery energy systems for stationary applications –
Part 2-2: Safety requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.220.99 ISBN 978-2-8322-7854-3

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

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 7 ----------------------
SIST EN IEC 62932-2-2:2020
– 2 – IEC 62932-2-2:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms, definitions and abbreviated terms ........................................................................ 9

3.1 Terms and definitions .............................................................................................. 9

3.2 Abbreviated terms ................................................................................................... 9

4 Procedure of the risk analysis .......................................................................................... 9

5 Safety requirements and protective measures ............................................................... 10

5.1 General ................................................................................................................. 10

5.2 Risk information .................................................................................................... 10

5.3 Electrical hazards ................................................................................................. 10

5.3.1 Electrical shock ............................................................................................. 10

5.3.2 Short-circuits ................................................................................................. 10

5.3.3 Leakage currents ........................................................................................... 11

5.4 Hazards of gaseous emissions .............................................................................. 11

5.4.1 General ......................................................................................................... 11

5.4.2 Harmful gas ................................................................................................... 12

5.4.3 Ventilation ..................................................................................................... 13

5.4.4 Warning sign ................................................................................................. 13

5.4.5 Close vicinity to emissions ............................................................................. 14

5.5 Hazard posed by liquids ........................................................................................ 14

5.5.1 General ......................................................................................................... 14

5.5.2 Detection of electrolyte leakage ..................................................................... 14

5.5.3 Protective measures against leakage ............................................................. 14

5.5.4 Specific information ....................................................................................... 14

5.5.5 Flow path identification .................................................................................. 15

5.6 Hazards of mechanical cause ............................................................................... 15

5.7 Operational hazards and measures ....................................................................... 15

5.7.1 General ......................................................................................................... 15

5.7.2 Start .............................................................................................................. 15

5.7.3 Remote monitoring and control systems ........................................................ 16

5.7.4 Protection ...................................................................................................... 16

5.7.5 Auxiliary power failure ................................................................................... 16

6 Instructions .................................................................................................................... 16

7 Identification labels or marking ...................................................................................... 16

7.1 Name plate information ......................................................................................... 16

7.2 Warning label information and location ................................................................. 17

8 Transport, storage, disposal and environmental aspects ................................................ 17

8.1 Packing and transport ........................................................................................... 17

8.2 Dismantling, disposal, and recycling ..................................................................... 17

9 Inspection ...................................................................................................................... 17

10 Maintenance .................................................................................................................. 18

11 Verification tests for protective measures ...................................................................... 18

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SIST EN IEC 62932-2-2:2020
IEC 62932-2-2:2020 © IEC 2020 – 3 –

11.1 General ................................................................................................................. 18

11.1.1 Tests ............................................................................................................. 18

11.1.2 Test object ..................................................................................................... 19

11.1.3 Test category ................................................................................................. 19

11.2 Dielectric strength of the parts in contact with the fluid .......................................... 19

11.2.1 Requirements ................................................................................................ 19

11.2.2 Category ........................................................................................................ 19

11.2.3 Number of samples ........................................................................................ 19

11.2.4 Test and acceptance criteria .......................................................................... 19

11.3 Operational sequence ........................................................................................... 19

11.3.1 Requirements ................................................................................................ 19

11.3.2 Category ........................................................................................................ 19

11.3.3 Number of samples ........................................................................................ 19

11.3.4 Test ............................................................................................................... 20

11.3.5 Acceptance criteria ........................................................................................ 20

11.4 Emergency stop .................................................................................................... 20

11.4.1 Requirement .................................................................................................. 20

11.4.2 Category ........................................................................................................ 20

11.4.3 Number of samples ........................................................................................ 20

11.4.4 Test ............................................................................................................... 20

11.4.5 Acceptance criteria ........................................................................................ 20

11.5 Protection ............................................................................................................. 20

11.5.1 Requirements ................................................................................................ 20

11.5.2 Category ........................................................................................................ 21

11.5.3 Number of samples ........................................................................................ 21

11.5.4 Test ............................................................................................................... 21

11.5.5 Acceptance criteria ........................................................................................ 21

11.6 Safety requirement for stacks ............................................................................... 21

Annex A (informative) Recommended structure of user manual ........................................... 22

A.1 General ................................................................................................................. 22

A.2 Table of contents .................................................................................................. 22

A.3 Safety warning ...................................................................................................... 22

A.4 Introduction ........................................................................................................... 22

A.5 Product description ............................................................................................... 22

A.5.1 Overview ....................................................................................................... 22

A.5.2 Technical specifications ................................................................................. 23

A.5.3 System structure............................................................................................ 23

A.5.4 Applications ................................................................................................... 23

A.5.5 Operational sequence .................................................................................... 23

A.6 Site requirements .................................................................................................. 23

A.6.1 Location and load .......................................................................................... 23

A.6.2 Access and clearance .................................................................................... 23

A.6.3 Precautionary measures for fluid containment................................................ 23

A.6.4 Ventilation ..................................................................................................... 24

A.6.5 Temperature .................................................................................................. 24

A.7 Operation .............................................................................................................. 24

A.7.1 General ......................................................................................................... 24

A.7.2 Checks before operation ................................................................................ 24

A.7.3 Energizing and de-energizing the system ....................................................... 24

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SIST EN IEC 62932-2-2:2020
– 4 – IEC 62932-2-2:2020 © IEC 2020

A.7.4 Valve status ................................................................................................... 24

A.7.5 Specific operations ........................................................................................ 24

A.7.6 Notices for operation ..................................................................................... 24

A.8 Alarms and fault finding ........................................................................................ 25

A.9 Maintenance ......................................................................................................... 25

A.10 Contact information ............................................................................................... 25

Annex B (normative) Safety requirements for stacks ............................................................ 26

B.1 General ................................................................................................................. 26

B.2 External short-circuit of the stack .......................................................................... 26

B.2.1 Requirements ................................................................................................ 26

B.2.2 Category ........................................................................................................ 26

B.2.3 Number of samples ........................................................................................ 26

B.2.4 Test ............................................................................................................... 26

B.2.5 Acceptance criteria ........................................................................................ 26

B.3 Heat shock strength .............................................................................................. 27

B.3.1 Requirements ................................................................................................ 27

B.3.2 Category ........................................................................................................ 27

B.3.3 Number of samples ........................................................................................ 27

B.3.4 Test ............................................................................................................... 27

B.3.5 Acceptance criteria ........................................................................................ 27

B.4 Leakage of the stack ............................................................................................. 27

B.4.1 Requirements ................................................................................................ 27

B.4.2 Category ........................................................................................................ 28

B.4.3 Number of samples ........................................................................................ 28

B.4.4 Test ............................................................................................................... 28

B.4.5 Acceptance criteria ........................................................................................ 28

Bibliography .......................................................................................................................... 29

Figure 1 – Flow battery energy system .................................................................................... 7

Table 1 – List of verification tests for protective measurements ............................................ 18

Table B.1 – List of verification tests for stacks for protective measurements ......................... 26

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SIST EN IEC 62932-2-2:2020
IEC 62932-2-2:2020 © IEC 2020 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FLOW BATTERY ENERGY SYSTEMS FOR STATIONARY APPLICATIONS –
Part 2-2: Safety requirements
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The objective 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. 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 edition.

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 62932-2-2 has been prepared by IEC technical committee 21:

Secondary cells and batteries, in collaboration with IEC technical committee 105: Fuel cell

technologies.
The text of this International Standard is based on the following documents:
FDIS Report on voting
21/1029/FDIS 21/1035/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 62932 series, published under the general title Flow battery energy

systems for stationary applications, can be found on the IEC website.
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SIST EN IEC 62932-2-2:2020
– 6 – IEC 62932-2-2:2020 © IEC 2020

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.
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SIST EN IEC 62932-2-2:2020
IEC 62932-2-2:2020 © IEC 2020 – 7 –
INTRODUCTION

A flow battery system (FBS) can be utilized in a flow battery energy system (FBES). Such an

FBES can consist of:
– a flow battery system,
– a power conversion system,
– other equipment and surroundings.

The FBES is connected to the external power input/output via a point of connection (POC).

This document covers the domain of the FBES, as shown in Figure 1. Energy to the auxiliary

systems such as the battery management system (BMS), the battery support system (BSS),

and the power conversion system (PCS) may be supplied by one of the following:
a) direct connection to the external power source;
b) the internal power source of the FBES or FBS itself.
Figure 1 – Flow battery energy system
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SIST EN IEC 62932-2-2:2020
– 8 – IEC 62932-2-2:2020 © IEC 2020
FLOW BATTERY ENERGY SYSTEMS FOR STATIONARY APPLICATIONS –
Part 2-2: Safety requirements
1 Scope

This part of IEC 62932 applies to flow battery systems for stationary applications and their

installations with a maximum voltage not exceeding 1 500 V DC in compliance with
IEC 62932-1.

This document defines the requirements and test methods for risk reduction and protection

measures against significant hazards relevant to flow battery systems, to persons, property and

the environment, or to a combination of them.

This document is applicable to stationary flow battery systems intended for indoor and outdoor

commercial and industrial use in non-hazardous (unclassified) areas.

This document covers significant hazards, hazardous situations and events, with the exception

of those associated with natural disaster, relevant to flow battery systems, when they are used

as intended and under the conditions foreseen by the manufacturer including reasonably

foreseeable misuse thereof.

The requirements described in this document are not intended to constrain innovations. When

considering fluids, materials, designs or constructions not specifically dealt with in this

document, these alternatives are evaluated as to their ability to yield levels of safety equivalent

to those specified in this document.
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 60079-10-1, Explosive atmospheres – Part 10-1: Classifica
...

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