SAE J2293 establishes requirements for Electric Vehicles (EV) and the off- board Electric Vehicle Supply Equipment (EVSE) used to transfer electrical energy to an EV from an Electric Utility Power System (Utility) in North America. This document defines, either directly or by reference, all characteristics of the total EV Energy Transfer System (EV-ETS) necessary to insure the functional interoperability of an EV and EVSE of the same physical system architecture. The ETS, regardless of architecture, is responsible for the conversion of AC electrical energy into DC electrical energy that can be used to charge the Storage Battery of an EV, as shown.
This document refers to both conductive (per SAE J1772) and inductive charging (per SAE J1773). A new SAE, Charging Communication Task Force has reviewed this document as it applies to both charging hardware systems (conductive and inductive) and applicability to the messages contained for the various energy transfer types (AC or DC conductive, inductive and on-board or off-board charger variations). This task force is also addressing new approaches as (1) the desire for bi-directional energy transfer from the vehicle to the utility grid (V2G), (2) updating the communication medium from SAE J1850 to either Power Line Communication (PLC) or wireless and (3) conforming to a major revision to SAE J1772 which includes a new set of connectors and signals between the EV and EVSE plus variations to AC and DC power levels. New vehicle architectures have also been introduced as Plug-In Hybrid (PHEV), Plug-In Fuel Cell Vehicles (PFCV) and may require unique communication aspects. Rechargeable Energy Storage Systems (RESS) have also changed dramatically since SAE J2293 was issued and new technologies along with packaging aspects may require specific communication criteria.
This is resulting in a major revision to our communication approach. In order to maintain information for existing systems or future vehicles that desire to use existing systems, this SAE J2293 task force plans to reaffirm SAE J2293 which preserves the existing information. A new J-document will be assigned to use the SAE J2293 basis, then add and delete info that address the new criteria listed above. It is planned to be specific to these needs and not include inductive charging aspects as no new changes are anticipated for that technology.