Flow battery energy systems for stationary applications - Part 2-1: Performance general requirements and test methods

IEC 62932-2-1:2020 specifies methods of test and requirements for the flow battery system (FBS) and the flow battery energy system (FBES) for the verification of their performances. This document is applicable to FBES or FBS which are designed and used for service in stationary locations (i.e. not generally to be moved from place to place). This document does not cover testing of the system for electromagnetic compatibility (EMC).

Flussbatterie-Energiesysteme für stationäre Anwendungen - Teil 2-1: Allgemeine Leistungsanforderungen und Prüfverfahren

Systèmes de production d’énergie de batteries d’accumulateurs à circulation d’électrolyte pour applications stationnaires – Partie 2-1: Exigences générales de performances et méthodes d’essai

L’IEC 62932-2-1:2020 spécifie les méthodes d’essai et les exigences applicables au système de batterie d’accumulateur à circulation d’électrolyte (FBS) et au système de production d’énergie à batterie d’accumulateur à circulation d’électrolyte (FBES) pour la vérification de leurs performances. Le présent document s’applique au FBES ou au FBS conçu et utilisé sur des sites stationnaires (c’est-à-dire généralement non destinés à être déplacés d’un lieu à un autre). Le présent document ne couvre pas les essais de compatibilité électromagnétique (CEM) du FBES ou du FBS.

Energijski sistemi pretočnih baterij za vgrajeno opremo - 2-2. del: Preskušanje splošnih zahtev in preskusnih metod

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Energijski sistemi pretočnih baterij za vgrajeno opremo - 2-2. del: Preskušanje
splošnih zahtev in preskusnih metod
Flow Battery Energy Systems for Stationary applications - Part 2-2: Performance general
requirements and test methods
Ta slovenski standard je istoveten z: EN IEC 62932-2-1:2020
29.220.99 Drugi členi in baterije Other cells and batteries
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.


April 2020
ICS 29.220.99
English Version
Flow battery energy systems for stationary applications - Part 2-
1: Performance general requirements and test methods
(IEC 62932-2-1:2020)
Systèmes de production d'énergie de batteries Flussbatterie-Energiesysteme für stationäre Anwendungen
d'accumulateurs à circulation d'électrolyte pour applications - Teil 2-1: Allgemeine Leistungsanforderungen und
stationnaires - Partie 2-1: Exigences générales de Prüfverfahren
performances et méthodes d'essai (IEC 62932-2-1:2020)
(IEC 62932-2-1:2020)
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 62932-2-1:2020 E

European foreword
The text of document 21/1028/FDIS, future edition 1 of IEC 62932-2-1, prepared by IEC/TC 21
"Secondary cells and batteries" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62932-2-1:2020.
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 62932-2-1:2020 was approved by CENELEC as a
European Standard without any modification.

Annex ZA
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)
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:
Publication Year Title EN/HD Year
IEC 61427-2 - Secondary cells and batteries for renewable EN 61427-2 -
energy storage - General requirements and
methods of test - Part 2: On-grid applications
IEC 62932-1 - Flow battery energy systems for stationary - -
applications - Part 1: Terminology and general
IEC 62932-2-2 - Flow battery energy systems for stationary - -
applications - Part 2-2 Safety requirements

IEC 62932-2-1 ®
Edition 1.0 2020-02
Flow battery energy systems for stationary applications –

Part 2-1: Performance general requirements and test methods

ICS 29.220.99 ISBN 978-2-8322-7853-6

– 2 – IEC 62932-2-1:2020 © IEC 2020
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 General requirements . 7
5 General test conditions . 7
5.1 Accuracy of measuring instruments . 7
5.1.1 Voltage measurement . 7
5.1.2 Current measurement . 7
5.1.3 Electric energy measurement . 7
5.1.4 Temperature measurement . 7
5.1.5 Time measurement . 7
5.2 Ambient temperature. 7
5.3 Point of connection (POC) and point of measurement (POM) . 8
5.4 Test object . 9
5.5 Test object unit (TOU) selection . 9
6 Test methods . 9
6.1 Determination of energy at a constant power . 9
6.1.1 General . 9
6.1.2 Test procedures . 9
6.2 Determination of maximum deliverable output power . 10
6.2.1 General . 10
6.2.2 Test procedures . 10
6.3 Determination of maximum receivable input power . 11
6.3.1 General . 11
6.3.2 Test procedures . 11
6.4 Determination of energy efficiency at a constant power level . 12
6.4.1 General . 12
6.4.2 Test procedures . 12
6.5 Determination of cycle life . 13
Annex A (informative) Testing of discharge power vs energy or energy efficiency . 14

Figure 1 – Flow battery energy system . 5
Figure 2 – POM/POC interconnection cases a), b), c) . 8

IEC 62932-2-1:2020 © IEC 2020 – 3 –

Part 2-1: Performance general requirements and test methods

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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 62932-2-1 has been prepared by IEC technical committee 21:
Secondary cells and batteries, in collaboration with IEC technical committee 105: Fuel cell
The text of this International Standard is based on the following documents:
FDIS Report on voting
21/1028/FDIS 21/1036/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.

– 4 – IEC 62932-2-1:2020 © 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 t

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