DC Charging and Standards for Plug-in Electric Vehicles 2013-01-1475

This paper is the fourth in the series of documents designed to identify the progress on the SAE Plug-in Electric Vehicle (PEV) communication task force. - The initial paper (2010-01-0837) introduced utility communications (J2836/1™ & J2847/1) and how the SAE task force interfaced with other organizations. - The second paper (2011-01-0866) focused on the next steps of the utility requirements and added DC charging (J2836/2™ & J2847/2) along with initial effort for Reverse Power Flow (J2836/3™ & J2847/3). - The third paper (2012-01-1036) summarized the task force documents and interaction. It also included the continued testing of PowerLine Carrier (PLC) products for Utility and DC charging messages using Electric Power Research Institutes (EPRI) test plan and schedule that were used at EPRI and Argonne National Labs (ANL). It also included a more complete section on Reverse Power Flow that has now expanded to Use cases for the Plug-In Electric Vehicle (PEV) as a Distributed Energy Resource (DER) that is now published as J2836/3™.

The purpose of this paper is to provide an update for Fast Charging or DC Charging. The documents for DC Level 1 & 2 charging have been published and include updates to three existing standards and the initial release of a fourth. J1772™ is the document for the EV Supply Equipment (EVSE), architecture and safety features for both AC and DC charging and was updated to place DC charging requirements back into it, since previous versions had it removed to focus on AC charging. The Combo connector was included along with isolation monitoring and control, precharge and additional safety features as part of the latest version of J1772™. J2931/1 is the communication requirements document and it was updated to include additional layers of the communication stack and harmonize with effort in ISO/IEC 15118 and DIN 70121 standards. The digital communication used for DC charging is PowerLine Carrier (PLC) known as HomePlug GreenPHY (HP GP) and is described in the initial release of J2931/4. PLC is a carrier signal on the J1772™ control pilot circuit and does not require additional terminals or circuits.

The publication of these documents also aligns with the UL certification of the SAE Combo connector so both the standards and the products are moving into the implementation phase with a solid base of documentation and equipment.

Customers can select different engines such as a V6 or V8 for the vehicle. The combination of modules and wiring is coordinated with these complexities so the vehicle is built correctly. It should be the same with on-board chargers and their EV Supply Equipment (EVSE) so the customer could choose the combination that matches their needs. The EVSE could be installed at their home or if desired, the customer could rely on public locations. Off-board chargers could be included in the home or public EVSE at a variety of power levels. This paper will identify an approach or tool that can be used to develop the customer value based on cost and time of re-charging both Plug-in Hybrid Electric (PHEV) and Battery Electric (BEV) types of Plug-in Electric Vehicles (PEV).