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IEC 62932-2-1
Edition 1.0 2020-02
INTERNATIONAL
STANDARD
Flow battery energy systems for stationary applications –
Part 2-1: Performance general requirements and test methods
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IEC 62932-2-1
Edition 1.0 2020-02
INTERNATIONAL
STANDARD
Flow battery energy systems for stationary applications –
Part 2-1: Performance general requirements and test methods
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.220.99 ISBN 978-2-8322-7853-6
– 2 – IEC 62932-2-1:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
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
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FLOW BATTERY ENERGY SYSTEMS FOR STATIONARY APPLICATIONS –
Part 2-1: Performance general requirements and test methods
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,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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6) All users should ensure that they have the latest edition of this publication.
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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
technologies.
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 this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
A flow battery system (FBS) can be utilized as a main part of 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 or output via a point of connection (POC).
This document includes the domain of the FBES, as shown in Figure 1. Auxiliary energy to the
battery management system (BMS), battery support system (BSS), and power conversion
system (PCS) may be supplied by one of the following:
– direct connection to the external power source;
– the internal power source of the FBES or FBS itself.
Figure 1 – Flow battery energy system
– 6 – IEC 62932-2-1:2020 © IEC 2020
FLOW BATTERY ENERGY SYSTEMS FOR STATIONARY APPLICATIONS –
Part 2-1: Performance general requirements and test methods
1 Scope
This part of IEC 62932 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).
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 62932-1, Flow battery energy systems for stationary applications – Part 1: Terminology and
general aspects
IEC 62932-2-2, Flow battery energy systems for stationary applications – Part 2-2: Safety
requirements
IEC 61427-2, Secondary cells and batteries for renewable energy storage – General
requirements and methods of test – Part 2: On-grid applications
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document the terms and definitions given in IEC 62932-1 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.
3.2 Abbrevia
...