RATIONALE
SAEJ3068is aremended practice for conductive charging of Electric Vehicles andSupply Equipment that utilize three-phase AC power.Presenting a symmetric three-phase load enhances grid stabity especially at high power levels.SAEreliability for the mercial vehicle market. Existing technology is bined to provide higher power than existing charging J3068standardizesanACthree-phasecapable charging Couplerand digital controlprotocolsoffering sufficient power andsolutions from the passenger car sector with added diagnostics. DC charging on separate contacts with PLC controls is also described as is limited three-phase AC charging with PWM controls providing interoperability with J1772 protocolswhere possible.
SAE J3068 provides for the following:
1.A higher power version of an existing charge Coupler for example 133 kW at 480 VAC 160 A three-phase.2.Bidirectional digital munication between the Electric Vehicle and the Supply Equipment (EVSE) via single wire3.Grid supply voltage is signaled before the EV and Supply Equipment agree to charge. For example in Canada 600 VACis more mon than 480 VAC but not all Electric Vehicles can utilize 600 VAC.4.Independent control of current imits on a phase-by-phase basis.Forexample this enables theminimum overall de-ratewhen only one phase leg has the available current restricted by the utility.5.The EV may signal requested current to enable a power management system to balance loads better. A minimumother than in an on-or-off fashion.
power requirement munication option supports fixed loads such as refrigeration which cannot control current draw
Only symmetric three-phase AC supplies are supported in this first edition (J3068 Edition 1). Asymmetric supplies such ascorner-grounded Delta and High-Leg-Delta may be supported in a future edition.
TABLE OF CONTENTS
SCOPE.Gener... REFERENCES.Applicable Documents SAE Publications.Federal Communication Commission Publications Canadian Standard Association Publications.International Electrotechnical Commission Publications..International Standards Organization Publications. National Fire Protection Association PublicationsUnderwriters Laboratories Inc. Publications.... Related Publications.SAE Publications.. Underwriters Laboratories Inc. PublicationsSwedish Standard Institute Publications.. 10DEFINITIONS 113.1 3.2 API.. Case A (not supported in J3068) 11 113.3 Case B (not currently supported in J3068) Case C. 113.4 3.5 CCID. 11 123.6 3.7 Charger Chassis Ground 12 123.8 3.9 Connector.. Connection Session 12 123.10 Control Sequence Control Pilot (CP) 123.11 3.12 Contactor. 12 123.13 3.14 Coupler.. CP Level. 13 123.15 3.16 Data Link. Delta Load (also Load) 13 133.17 Electric Vehicle Supply Equipment (EVSE) Electric Vehicle (EV) 133.18 3.19 EMC 133.21 3.20 Equipment Ground (Grounding Conductor) EVSE. 13 133.22 3.23 Frame. GND 13 133.24 Ground 143.25 3.26 Header... Inlet. 14 143.27 3.28 Kbps. LIN. 14 143.30 3.29 LIN-CP. MCU. 14 143.31 Message. On-Board Charger.. 143.32 3.33 Plug.. 14 143.34 3.35 Proximity Detection (or Prox) Publisher 14 143.36 3.37 Response. PWM-CP 15 153.38 RxD 153.39 Schedule 15
2.1 2. 7 72.2.1 2.2 7 72.2.2 2.2.32.2.4 8' 82.2.5 2.2.6 .9 82.2.7 2.3 6° 62.3.1 2.3.2 ... 62.3.3
3.40 3.41 SE. SE Outlet. 15 153.42 3.43 Signal. Subscriber. 15 153.44 3.45 Supply Equipment (SE) Task. 153.46 TxD.. 15 163.47 3.48 Valid Signal UART. 16 163.49 WYE Load (also Y Load). 164. DOCUMENT AND SYSTEM OVERVIEW 174.1 4.2 Document Overview... System Overview... 17 184.3 4.4 Electrical SystemTopology... Functional Concept of Digital Control 18 205. GENERAL REQUIREMENTS. 215.1 J3068 Coupler Classification.. 215.2 5.2.2 SE and EV Classification. Supplied AC Power informative . 21 225.3 5.4 SE Requirements. EV Requirements. 23 235.5 5.6 Coupler Requirements. Communication Requirements. 24 275.6.1 LIN-CP Communication. 275.6.2 Proximity Function.. 286.1 6. General.. CONTROL PILOT 29 296.2 Control Pilot Circuit 30 316.2.3 6.2.2 Requirements for Combined LIN-CP and PWM-CP Comparison with the Standard ISO 17987-4 LIN Bus Circuit . 326.2.4 6.3 Optional Cable Assembly Node... CP Level Signaling. 32 326.3.2 6.3.1 CP Level Definition. CP Level Detection by the EV. 32 336.3.3 CP Level Detection by the SE. .337. PROXIMITY DETECTION.. 357.1-1 7.1 General.. Proximity Detection.7.1.2 7.2 Proximity Detection Circuit. Immobilization.. .358.1 8. DIGITAL COMMUNICATION PROTOCOL General. 388.2 8.3 LIN Protocol Introduction.. LIN Signals..8.3.2 8.3.1 EvAwake EvFrequencies8.3.3 EvlnfoEntries..8.3.4 EvlnfoPageNumber.
35 3535
3838 3839 39398.3.5 EvMaxCurrents 40 408.3.6 8.3.7 EvMaxVoltageL1N EvMaxVoltageLL 40 408.3.9 8.3.8 EvMinCurrents EvMinVoltageL1N 41 418.3.10 EvPresentCurrents. EvMinVoltageLL 418.3.11 42
8.3.12 8.3.13 EvRequestedCurrents. EvResponseError. 43 428.3.14 8.3.15 EvSelectedVersion... EvStatuslnit. 43 438.3.16 8.3.17 EvStatusOp .438.3.18 EvSupportedVersions... EvStatusVer 44 448.3.19 8.3.20 EvVersionPageNumber.. SeAvailableCurrents 44 448.3.21 8.3.22 SeFrequency. SelnfoEntries. 45 458.3.23 SelnfoPageNumber... 468.3.24 8.3.25 SeNomVoltageL1N SeMaxCurrents 46 468.3.26 8.3.27 SeSelectedVersion... SeNomVoltageLL 47 478.3.28 8.3.29 SeStatusOp.. SeStatuslnit.. 47 488.3.30 SeStatusVer.8.3.31 8.3.32 SeSupportedVersions. SeVersionPageNumber 49 488.4 8.4.1 LIN Frames List of Defined Frames... 498.4.2 8.5 Paged Frames. LIN Schedules. 52 529.1 9. Typical CP Controller Implementation Concept APPLICATION PROGRAM NORMAL SEQUENCE. 54 549.2 9.3 Application Program Overview... Timing Requirements... 54 559.4 9.5 Version Selection Control Sequence Star... 569.5.2 Version Selection Normal SE Sequence 56 569.5.3 9.5.4 Version Selection EV Normal Sequence Version Selection Optional Sequence to Start PWM-CP. 56 579.6.2 9.6 Initialization Initialization Normal SE Sequence.. 57 579.6.3 9.7 Initialization Normal EV Sequence.... 589.7.2 Operation. Operation Voltage Control 58 589.7.4 9.7.3 EV CommandsInterruption of the ACSupplyVoltage Operation Current Control. 59 609.7.5 9.8 SE Interrupting the AC Supply Voltage... Connection Session End Initiated by the User 60 609.8.1 Connection Session End While AC Voltage Is Not Supplied. 609.8.2 Connection Session End While AC Voltage Is Supplied ..110. 10.1 LIN Sleep APPLICATION PROGRAM EXCEPTIONAL EVENTS. 62
10.4.2 10.5 SE Power Outage SE Determines that Initialization Fails 63 6310.6 10.6.1 SE or EV MCU Watchdog Reset . SE MCU Watchdog Reset.. 64 6410.6.2 10.7 EV MCU watchdog reset... 6410.7.1 LIN Communication Interrupted. EV Detects No LIN Headers . 64 6410.7.2 10.8 SE Detects No LIN Responses... Faults.. 64 6510.8.1 10.8.2 EV Detects an Internal Fault. SE Detects Internal Fault.. 65 6510.8.3 SE Detects CP Level O.. 6510.8.4 10.9 SE Detects CP Level 12. EvlnfoEntries and SelnfoEntries Signal Values... .65 65
11. NOTES. 6811.1 Revision Indicator. 68APPENDIX A EXAMPLE TIMING SEQUENCES WITH LIN-CP CONTROLS (INFORMATIVE) 69APPENDIX C APPENDIX B FRAMEDEFINITIONSANDCOMMUNICATIONSUMMARY NORMAL CONNECTION SESSION HARDWARE STATUS COMPARED TO SIGNAL VALUES 83 75APPENDIX D APPENDIX E EXAMPLE LIN DEFINITION FILE (19.2 Kbps 60 Hz Version). ASYMMETRIC THREE-PHASE WYE LOAD TRANSLATION TO DELTA LOAD 84APPENDIX F APPENDIX G DIFFERENCESBETWEENLINCOMMUNICATIONVERSIONS1AND2 SUMMARY OF REQUIREMENTS WITH HYPERLINKS .96 93Figure 1 Case B:Fully removable charging cord Case A: Charging cord attached at vehicle... 11 11Case C: Charging cord attached at SE.. General conductive charging system topology for typical Case C 11 18Timeline' concept of a connection session managed by the digital control pilot. Electrical system block diagram.. 19 20Typical J3068 ACs connector and inlet photos (contact placement as seen by user) 25J3068 DCe no AC connector and J3068 DCa/ACe inlet (contact placement as seen by user). ACs keyed inlet and connecter NOT ALLOWED 26 27Comparison of LIN-CP levels to PWM states (duty cycle not to scale) ElectricalequivalentcircuitforconnectionofLiNnodesto the controlpilotcircuit 29 30Equivalent Prox circuit diagram for J3068 coupler.. 36Typical control pilot controller concept. 54 55Controllogic conceptsforS2and contactor informative. Example timing diagram for start of normal AC control sequence. 59 69Example timing diagram for normal EV-triggered end of charging End of charging triggered by SE (non-emergency) 73 71Figure 19 Example Wye source with Delta loads... .91Table 1 Coupler classification... 21SE classification. EV classification. 21 22Examples of single-phase AC power (informative). Examples of three-phase AC power (informative) . 22 22Coupler contact functions.... 26EV control pilot circuit parameters (see Figure 11) SE control pilot circuit parameters (see Figure 11). 30 31Transceiver parameters (SE and EV) Definition of CP levels. 31 33Component values. Remended CP level detection by the SE 36 34EV detection of proximity voltages. 37Table 14 Frames. 50
Figure2Figure 3 Figure 4Figure6 Figure 5Figure 7Figure 8 Figure 9Figure 10 Figure 11Figure 13 Figure 12Figure 14Figure 15 Figure 16Figure 17 Figure 18
Table 2 Table3Table 4 Table 5Table 7 Table6Table 8Table9 Table 10Table 11 Table 12Table 13
