Integration Technology for PHEV-Grid-Connectivity, with Support for SAE Electrical Standards

2010 DOE Hydrogen Program and Vehicle Technologies – Annual Merit Review – June 09, 2010 – Theodore Bohn (PI and Presenter) Argonne National Laboratory

Project ID #VSS025

The presentation covers interim design discussions about electric vehicle charging station infrastructure plans. It states the SAE PHEV-Grid initiative began in 2007, meaning the SAE began planning for electric vehicle interconnection with smart grid that early.

Describes barriers as

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  • Many vehicles charging from the grid interact and compete with existing electrical loads.
  • Alternative approaches exist to intelligently manage vehicle charge and communication.
  • Interoperability of vehicle-grid communication and hardware connections is a necessity for effective infrastructure deployment.
  • Low cost, secure and validated technology and communication standards are required coincident with PHEV/EV market introductions.

Objectives

  • Address codes and standards requirements to enable wide-spread adoption of electric-drive transportation.
  • Demonstrate improved grid connectivity of electric vehicle charging infrastructure via lower cost, secure, universalized wired and wireless communications technologies.
    • Produce functional demonstration of ‘Software Defined Radio’ (SDR) technology in a low cost field programmable gate array (FPGA) device implementing Universal Metropolitan Area Network (UMAN).
    • Demonstrate compact AC power measurement sub-metering system with wireless communication to Advance Meter Infrastructure (AMI) as alternative to secondary dedicated EV charging meter installation
  • Validate in a systems context performance targets
    • Power Electronics and Energy Storage Technology electric motor ratings standards activity
    • Energy storage system communications technology validation.

The presentation shows a comparison of the J1772 Combo Plug for DC Fast Charge against the CHADEMO connector, demonstrating the CHADEMO is bigger than the J1772 Combo Plug. Later it shows a draft version of the DC Fast Charge combo plug as the preferred future (that has since become reality).

Clearly the goal is for electric cars to be integrated with ZigBee smart grid standards, based on this slide titled “Hardware Compatibility”

  • Demonstrating hardware interoperability requires additional communication between the EVSE and the utility AMI infrastructure.
  • Though ZigBee communication using Smart Energy Profile (SEP 2.0) is assumed for most of the SAE development work, the utility HAN standards offer Home Gateway as an alternative for utility communication.
  • The home gateway solution will integrate electric vehicle as one of the home appliances monitored and controlled as part of the home energy management system.

The slides following this talk about further smart grid standards

  • The PHY (layer 2) specifications defined by IEEE 802.15.14 (zigbee), IEEE 802.15.14c/d (China and Japan version) and IEEE 802.15.14g (under development).
  • Universal Metropolitan Area Network (U-MAN) sub-MHz frequency range listed here for different countries has better signal penetration through buildings than typical 2.4GHz WiFi or Zigbee wireless.
  • Integrate SDR- based UMAN radio into EVSE modular communications port and validate functionality with HMI.
  • Work closely with experts in state of the art execution of IEEE 802.15.4 (Zigbee) such as DTE Energy Meter Lab, to integrate electric vehicle supply equipment (EVSE) to Zigbee communication on electrical utility meter deployed Advanced Metering Infrastructure (AMI).
  • Subcontract development of a Home Area Network (HAN) compliant gateway that allows messages to pass from the vehicle to EVSE to Utility or home network communications equipment via IPv6. (harmonized with GITT Project 2 software).
  • Define testing procedures to validate functionality of Home Gateway network with other system components and test environments, such as higher electromagnetic interference (EMI) exposure
  • Set up evaluation test bench at DTE Meter Lab for Home Gateway Interoperability Testing
  • Investigate interoperability of Home Gateway with existing EVSE manufacturers products
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About David Herron

David Herron is a writer and software engineer living in Silicon Valley. He primarily writes about electric vehicles, clean energy systems, climate change, peak oil and related issues. When not writing he indulges in software projects and is sometimes employed as a software engineer. David has written for sites like PlugInCars and TorqueNews, and worked for companies like Sun Microsystems and Yahoo.

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