Standards Development

Scope

This part of IEC 61851 applies to the EV supply equipment to provide energy transfer between the supply network and electric vehicles (EVs), with a rated maximum voltage at side A of up to 1 000 V AC or up to 1 500 V DC and a rated maximum voltage at side B up to 1 500 V DC.

This document specifies the EV supply equipment of system A, system B, system C and system D as defined in Annex A, Annex B, Annex C, and Annex D. Other systems are under consideration.

This document provides the requirements for bidirectional power transfer (BPT) EV supply equipment for system A and system C, with a rated maximum voltage at side A up to 1 000 V AC or 1 500 V DC. The requirements for reverse power transfer (RPT) and BPT for system B are under consideration and are not specified in this document.

Annex E provides information on the behaviour and functional requirements at side B to support grid code compliance during bidirectional power transfer (forward power transfer is under consideration). It focuses on the coordination between the EV supply equipment and the EV in response to grid events on side A.

NOTE 1 Users of this standard should be aware that in most jurisdictions there are national or local requirements that must be met by systems using EV supply equipment with reverse power transfer. Examples include EN 50549-1, IEEE 1547, DIN VDE-AR-N 4105, and AS/NZS 4777.2

This document does not cover all safety aspects related to maintenance.

This document specifies systems with protective separation between side A and side B. Systems without protective separation between side A and side B are under consideration. For example, systems without separation or systems with simple separation.

The requirements for digital communication between EV supply equipment and the EV to control energy transfer are defined in IEC 61851‑24.

Requirements for energy transfer with an automated connection device are given in IEC 61851‑23‑1[1].

Specific requirements for EV supply equipment with multiple vehicle connectors are provided in Annex G.

General information about energy transfer control, signalling and digital communication is provided in Annex H.

General information on the touch current and touch impulse current is provided in Annex I.

Requirements for EV supply equipment without current, voltage and/or power control are under consideration.

For CVM, when the battery system is not connected: under consideration.

EV supply equipment in compliance with this document are not intended to provide energy transfer to a single EV with

– multiple vehicle connectors of the same EV supply equipment, or

– multiple EV supply equipment.

Requirements for such use case are under consideration.

SecNote: There are discussions from organization like CharIN about energy transfer with EVs with multiple vehicle connectors. Proposals are welcomed. See Annex J.

NOTE 2 Requirements for EVs mated to an EV supply equipment are specified in ISO 5474 series.

This document does not cover accessibility requirements related to the use of EV supply equipment by persons with reduced mobility and persons with disabilities.