IEC 62933-1:2018

IEC 62933-1 ®
Edition 1.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical energy storage (EES) systems –
Part 1: Vocabulary
Systèmes de stockage de l’énergie électrique (EES) –
Partie 1: Vocabulaire
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IEC 62933-1 ®
Edition 1.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical energy storage (EES) systems –

Part 1: Vocabulary
Systèmes de stockage de l’énergie électrique (EES) –

Partie 1: Vocabulaire
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 01.040.17 ISBN 978-2-8322-5403-5

– 2 – IEC 62933-1:2018  IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions for EES systems classification . 6
4 Terms and definitions for EES systems specification . 9
5 Terms and definitions for EES systems planning and installation . 22
6 Terms and definitions for EES systems operation . 24
7 Terms and definitions for EES systems safety and environmental issues . 27
Annex A (informative) Index . 30
A.1 Terms index . 30
A.2 Abbreviated terms index . 32
Bibliography . 33

Figure 1 – Illustrative example of EES system charging/discharging cycle . 10
Figure 2 – Illustrative example of EES system power capability chart . 12
Figure 3 – Illustrative example of EES system response performances . 20
Figure 4 – EES system architecture with one POC type . 22
Figure 5 – EES system architecture with two POC types . 23

Table 1 – Illustrative example of EES system efficiency chart . 18

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL ENERGY STORAGE (EES) SYSTEMS –

Part 1: Vocabulary
FOREWORD
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International Standard IEC 62933-1 has been prepared by IEC technical committee 120:
Electrical Energy Storage (EES) Systems.
The text of this standard is based on the following documents:
FDIS Report on voting
120/116/FDIS 120/119/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62933 series, published under the general title Electrical energy
storage (EES) systems, can be found on the IEC website.

– 4 – IEC 62933-1:2018  IEC 2018
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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INTRODUCTION
The purpose of this terminology document is to provide terms and definitions for all the
publications under the responsibility of TC 120, that standardize electrical energy storage
systems (EES systems) including unit parameters, test methods, planning, installation, safety
and environmental issues. An EES system includes any type of grid-connected energy
storage which can both store electrical energy and provide electrical energy (from electricity
to electricity).
All TC 120 normative documents are subject to revision, this part of IEC 62933 will be revised
together with other TC 120 publications in order to avoid mismatches.
From the technical point of view, an EES system can be a complex multi stage system with
several possible energy conversions. Each stage is made by components well standardized
(e.g. transformers, power converter systems) or innovative components (e.g. new types of
batteries). Several IEC product standards give definitions necessary for the understanding of
certain terms used for these components. The International Electrotechnical Vocabulary (IEV,
IEC 60050, http://www.electropedia.org), the IEC Glossary (http://std.iec.ch/g
...