Transatlantic Workshop on Electric Vehicles and Grid Connectivity
Opportunities for Cooperation
on Technology Development
to Support a
Robust Vehicle-Grid Interface
Keith Hardy
Argonne National Laboratory
Vehicle Technologies Program
US Department of Energy
Transatlantic Workshop on Electric Vehicles and Grid Connectivity
Opportunities in the Vehicle-Grid System
Energy Producers
Utilities
Human Machine Interface (HMI) *
Grid Operators
• 2-way communication to vehicle/grid
• Practical evaluation of protocols
• SAE J2836/2847/2931
Power Panel
Back Office Software
• Comprehend vehicle roaming
• Integrate EVs in the smart grid
Smart Meter
Streamlined EVSE Installation Process *
• Best practices and permitting template
Consumer-Vehicle-Grid Communication
► Vehicle ID, location, charge requirements
◄ Power available, price, recommended charge time
• SAE J2836  ISO/IEC 15118; general info (use cases)
• SAE J2847  ISO/IEC 15118; detailed info (messages)
• SAE J2931  ISO/IEC 15118; protocol (requirements)
Universal Communication Technology *
• e.g., Software Defined Radio-SDR
Verification of EVSE Interoperability *
• SAE J2953
* Joint (government-industry) Grid Interaction Tech Team projects
Home Network
Vehicle Test Procedures
• Fuel/energy consumption
• Consumer labeling (e.g., EPA)
• SAE J1711
EV Sub-meter *
• Revenue grade
• Enables preferential and
time-of-use pricing
Electric Drives
• Test procedures and ratings
• SAE J2907/2908
Battery System Safety
• Test procedures, shipping and handling
• SAE J2929
Charge Couplers
• Global interoperability
• SAE J1772
Transatlantic Workshop on Electric Vehicles and Grid Connectivity
Software Defined Radio (SDR):
Revenue Grade Sub-meter:
- Utility owns sub-meter, customer owns base
- Based on <$5, 60A AC disconnect device
- Current sensor technology is > 0.1% accuracy
- Revenue grade ‘subtractive’ meter is 0.3% class
- Communication based on Zigbee/UMAN via SDR
- Enables Single Chip Communication Solution
- Vehicle-Grid Communication
- Flexible Universal Metropolitan Area Network
- OFDM modulation achieved in 16,000 gate FPGA
- Programmed for Zigbee (IEEE 802.15.4-2006)
- UMAN (IEEE 802.15.4g); flexible baseband frequency
Prototype SDR implemented on
(non-optimized) evaluation board
Current sensors built into bus bars;
Single board metrology, 90x50x25 mm
Potential cooperative field
evaluation and access
OFDM modulation/demodulation example
Transatlantic Workshop on Electric Vehicles and Grid Connectivity
Interactive
Vehicle-Grid Connectivity
Technology Demonstrator