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Plug‐in Electric Vehicle (PEV)PLC based Communications
Slav BerezinGeneral Motors
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PEV Communications Demand
PEVHAN/EMS
Grid/Operators
EVSE(AC/DC)
Owner
PEV has become a desired communications node
Else
December 14, 2011 2Slav Berezin, General Motors
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PEV Side of Communications• OEMs need to control the number of potential on‐board
communication interfaces.
• Optimization and streamlining of these interfaces willsimplify choices of connecting to PEV for other parties aswell.
• Wired link is required for PEV Communications for DC Off‐board charging control and to ensure proper association withEVSE for Smart Energy support.
• Design of the SAE J1772™ Conductive Charging connectorwas targeting reduction of the coupler interface, eliminationof the need for mechanical assist, and increasing reliability(fewer pins are better).
December 14, 2011 3Slav Berezin, General Motors
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EVSE
System configurations (a year ago)
Home AreaNetwork(HAN)
PEV
J1772TM Cordset
PLC – SE2 only
GW
PLC
Home AreaNetwork(HAN)
EVSE
PEV
J1772TM Cordset
PLCPLCSE2 and DC Charging
GW
PLC
DC Charger
Scenario 1: AC Charging – EVSE is “passing through” Smart Energy 2.0 (SE2) Communication over J1772 cordset L1/N directly from vehicle to HAN gateway and to utility.
Scenario 2: DC Charging with active EVSE‐‐DC charge control messages and SE2 Communications (bridged in EVSE) over J1772 cordset L1/N or P/G wires.
Logical Message Flow
J1772CordsetL1 L2
DC Charge Control
Bridge
PLC
PLC
PhysicalLinks
Mains
SE2
© 2011 Electric Power Research Institute, Inc. All rights reserved.
Complexity
PLC
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Potential scenario Implementations
December 14, 2011 Slav Berezin, General Motors 5© 2011 Electric Power Research Institute, Inc. All rights reserved.
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Road to a single PLC solution
• PLC “competitions” and preliminary tests were run by IEC/ISOand EPRI/SAE teams as well as internal studies by some OEMs.
• Major OEMs came together and agreed to come up with acommon, single PLC Communications solution (for both ACand DC Charging) for as many markets as possible.
• HomePlug GreenPHY technology on the J1772™ Control Pilotwire has been accepted as a working assumption .
December 14, 2011 6Slav Berezin, General Motors
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EVSE‐PEV Link Architecture*
HPGP Link Layer
J1772™ Charging cable (Pilot/GND)
Network Layer Network Layer
Transport Layer
DC Charging Application Layer
HPGP Link LayerHAN* Link Layer
Network Layer
Router
Network Layer
DC Charging Application Layer
Vehicle CAN bus“The Cloud”
CAN Link Layer
Interaction Layer
Transport Layer
* Example, not all layers are not shown
December 14, 2011 7Slav Berezin, General Motors
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PEV PLC‐based System Setup
Now HPGP on CP of J1772™ charging cord
PEV‐EVSE link
PLCCellular/PLC/Wi‐FiWi‐MAX/ZigBee
December 14, 2011 8Slav Berezin, General Motors
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< TAKE‐AWAY >• PEV‐EVSE HPGP‐over‐CP link is being developed as thecommon standard for PEV DC Charging and UtilityCommunications.
• EVSE has an important role to play completing PEV toHAN/Utility communications path redirecting andsending all relevant information bi‐directionally as abridge/gateway/router as required.
• This architecture offers much needed flexibility todayproviding HAN/PEV/Utility with necessary connectivityoptions.
December 14, 2011 9Slav Berezin, General Motors
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Thank you!
December 14, 2011 Slav Berezin, General Motors 10