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IEC 61851-25
Edition 1.0 2020-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric vehicle conductive charging system –
Part 25: DC EV supply equipment where protection relies on electrical
separation
Systeme de charge par conduction pour vehicules electriques –
Partie 25: Système d'alimentation en courant continu pour véhicules électriques
dont la protection s'appuie sur la séparation électrique
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IEC 61851-25
Edition 1.0 2020-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric vehicle conductive charging system –
Part 25: DC EV supply equipment where protection relies on electrical
separation
Systeme de charge par conduction pour vehicules electriques –
Partie 25: Système d'alimentation en courant continu pour véhicules électriques
dont la protection s'appuie sur la séparation électrique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 43.120 ISBN 978-2-8322-9122-1
– 2 – IEC 61851-25:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 General requirements . 10
5 Classification . 11
6 Charging modes and functions . 11
7 Communications . 17
8 Protection against electric shock . 18
9 Conductive electrical interface requirements. 19
10 Requirements for adaptors . 20
11 Cable assembly requirements . 20
12 EV supply equipment constructional requirements and tests . 21
13 Overload and short-circuit protection . 26
14 Automatic reclosing of protective devices . 27
15 Emergency switching or disconnect (optional) . 27
16 Marking and instructions . 27
Annex AA (normative) Interface between DC EV supply equipment and EV . 29
Annex BB (normative) Level, timing and tolerance of DC output current and DC output
voltage . 32
Annex CC (normative) Description of test equipment, test reporting and test
environment . 38
Annex DD (normative) Compliance tests . 42
Annex EE (normative) Energy transfer process and communication . 51
Annex FF (normative) Digital communication for control of energy transfer . 57
Bibliography . 65
Figure 1 – Measuring network for touch current evaluation weighted for perception or
reaction . 24
Figure 2 – Example of warning label . 28
Figure AA.1 – Interface circuit for energy transfer control showing isolation barriers . 31
Figure BB.1 – Step response for constant value control . 33
Figure BB.2 – Example of DC output current flow controlled by the DC EV supply
equipment and the corresponding terminal voltage using a simple battery model . 35
Figure BB.3 – Example of current limiting followed by voltage limiting for resistive load . 36
Figure CC.1 – Example of test circuit for DUT using a computer and external EV
simulation circuit . 38
Figure CC.2 – Example of test load . 39
Figure CC.3 – Operation points . 41
Figure EE.1 − State transition diagram of charging process . 53
Figure EE.2 – Sequence diagram of energy transfer . 54
Figure FF.1 – Transmission cycle . 57
Table 1 – Normal shutdown events and conditions . 16
Table 2 – Error shutdown events and conditions . 16
Table AA.1 – Voltage of control pilot circuit . 29
Table AA.2 – Parameter values for interface circuit . 31
Table BB.1 – Requirements for the output response performance of DC EV supply
equipment . 34
Table BB.2 – Current ripple limit of DC EV supply equipment. 37
Table DD.1 – Correspondence between requirements and test descriptions . 42
Table DD.2 – Initial switch and parameter values for a normal start-up sequence . 43
Table DD.3 – The test value for control pilot circuit . 46
Table DD.4 – Shutdown requirements . 49
Table EE.1– Energy transfer state of DC EV supply equipment . 51
Table FF.1 – Physical/data link layer specification . 57
Table FF.2 – Received parameters during energy transfer (1 of 3) . 59
Table FF.3 – Transmitted parameters during DC charging (1 of 2) . 62
– 4 – IEC 61851-25:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –
Part 25: DC EV supply equipment where protection
relies on electrical separation
FOREWORD
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