Standards Development

Scope

This document specifies safety and interoperability requirements for automated conductive power transfer between electrically propelled road vehicles (EV) and external electric circuits. External electric circuits include external electric power supplies and external electric loads. This document provides requirements for the charging modes 2, 3, 4, as defined in IEC 61851-1:2017, and reverse power transfer. For mode 4, this document provides requirements regarding the connection to an isolated DC EV charging station according to IEC 61851-23.

This document applies to electrically propelled road vehicles equipped with automated couplers. T

his document inter alia addresses the following aspects for the on-board part of an ACD-system:

- electrical and mechanical safety and interoperability,

- environmental conditions,

- positioning mechanism and position of on-board couplers,

- functions and communication, and

- test procedures.

Purpose

The importance of electrically propelled vehicles to reduce emissions in traffic is unbroken. Continuously new technologies are being developed and new use cases are added with the increasing spread of electric vehicles.

The state of the art of EV power transfer including wireless, AC and DC charging as well as reverse power transfer is evolving rapidly. Even during the final stage of the development of ISO 17409 (2. Edition) and ISO 19363 new features and requirements appeared in the market which demands for an early revision. Additional new topics such as automated connection and special requirements for commercial vehicles are now ready for standardization.

The new project considers to merge the standards for conductive power transfer and wireless power transfer into one standard in order to benefit from commonalities and to improve harmonization. To support readability and application of the standard the new project will be structured into 5 parts:

Part 1: General

Part 2: AC power transfer

Part 3: DC power transfer

Part 4: Wireless power transfer

Part 5: Automatic conductive connection

The new structure not only supports the user but also better allows experts to focus on their area of expertise as well. Another result of the new structure will be lean documents which allow for individual revision in the future while other parts can remain stable.

Part 5 focusses on automated conductive power transfer as an indispensable prerequisite for autonomous driving and autonomous parking of electrically propelled road vehicles. In addition, automation increases the charging convenience for the end-user and thus is seen as a further driver of electric mobility.

The document will address the relevant safety requirements and will provide confidence to manufacturers developing and producing such systems. Interoperability is the second key aspect. From manufacturer perspective, interoperability supports reaching a large amount of markets with reduced numbers of variants (economic benefits for manufacturers and end-users). For end-users, interoperability enables provider-independent (public) charging and reinforces the confidence in electric mobility.

The proposed deliverable is intended to provide requirements for conformity assessment which might in future be applied as reference for technical regulations