IEC 62932-2-2:2020

Flow battery energy systems for stationary applications - Part 2-2: Safety requirements

IEC 62932-2-2:2020 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.

Systèmes de production d'énergie à batteries d'accumulateurs à circulation d'électrolyte pour les 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.

General Information

• Status: Published
• Publication Date: 17-Feb-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.220.99 - Other cells and batteries
• Technical Committee: TC 21 - Secondary cells and batteries
• Drafting Committee: JWG 7 - TC 21/JWG 7
• Current Stage: PPUB - Publication issued
• Start Date: 21-Feb-2020
• Completion Date: 18-Feb-2020

Standards Content (Sample)

IEC 62932-2-2 ®
Edition 1.0 2020-02
INTERNATIONAL
STANDARD
Flow battery energy systems for stationary applications –
Part 2-2: Safety requirements
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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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

– 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

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

– 4 – IEC 62932-2-2:2020 © IEC 2020
A.7.4 Valve status .
...

IEC 62932-2-2 ®
Edition 1.0 2020-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Flow battery energy systems for stationary applications –
Part 2-2: Safety requirements
Systèmes de production d’énergie à batteries d’accumulateurs à circulation
d’électrolyte pour les applications stationnaires –
Partie 2-2: Exigences de sécurité

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.

need further assistance, please contact the Customer Service

Centre: [e-mail].
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IEC 62932-2-2 ®
Edition 1.0 2020-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Flow battery energy systems for stationary applications –

Part 2-2: Safety requirements
Systèmes de production d’énergie à batteries d’accumulateurs à circulation

d’électrolyte pour les applications stationnaires –

Partie 2-2: Exigences de sécurité

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.99 ISBN 978-2-8322-8538-1

– 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

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
...