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Energy Transfer System for Electric Vehicles - Part 1: Functional Requirements and System Architectures
- Ground Vehicle Standard
Published February 26, 2014 by SAE International in United States
Downloadable datasets availableAnnotation ability available
SAE J2293 establishes requirements for Electric Vehicles (EV) and the off-board Electric Vehicle Supply Equipment (EVSE) used to transfer electrical energy to an EV from an Electric Utility Power System (Utility) in North America. This document defines, either directly or by reference, all characteristics of the total EV Energy Transfer System (EV-ETS) necessary to insure the functional interoperability of an EV and EVSE of the same physical system architecture. The ETS, regardless of architecture, is responsible for the conversion of AC electrical energy into DC electrical energy that can be used to charge the Storage Battery of an EV, as shown in Figure 1.
The different physical ETS system architectures are identified by the form of the energy that is transferred between the EV and the EVSE, as shown in Figure 2. It is possible for an EV and EVSE to support more than one architecture.
This document does not contain all requirements related to EV energy transfer, as there are many aspects of an EV and EVSE that do not affect their interoperability. Specifically, this document does not deal with the characteristics of the interface between the EVSE and the Utility, except to acknowledge the Utility as the source of energy to be transferred to the EV.
The functional requirements for the ETS are described using a functional decomposition method. This is where requirements are successively broken down into simpler requirements and the relationships between requirements are captured in a graphic form. The requirements are written as the transformation of inputs into outputs, resulting in a model of the total system.
Each lowest level requirement is then allocated to one of four functional groups (FG) shown in Figure 2. These groups illustrate the variations of the three different system architectures, as the functions they represent will be accomplished either on an EV or within the EVSE, depending on the architecture. Physical requirements for the channels used to transfer the power and communicate information between the EV and the EVSE are then defined as a function of architecture. System architecture variations are referred to as follows:
Type A—Conductive AC System Architecture—Section 7.2.1
Type B—Inductive System Architecture—Section 7.2.2
Type C—Conductive DC System Architecture—Section 7.2.3
The requirements model in Section 6 is not intended to dictate a specific design or physical implementation, but rather to provide a functional description of the system’s expected operational results. These results can be compared against the operation of any specific design. Validation against this document is only appropriate at the physical boundary between the EVSE and EV. See Section 8.
This stabilized Recommended Practice documents for reference the historical state of energy transfer systems and communications for electric vehicles as they existed in 2008, as defined in SAE J1772 (per published version 11-1-2001) for conductive charging and SAE J1773 (per published version 11-1-1999) for inductive charging.
SAE J1772 continues to be updated to reflect the latest in conductive charging technology. See the latest available version of J1772.
SAE J1773 remains unchanged for inductive charging.
Documentation for the now-emerging “wireless” inductive charging systems will be published when available.
Grid power quality for supplying charging systems is covered in SAE document series J2894.
For state-of-the-art documentation on charging communications, refer to the SAE documents in the series J2836, J2847, J2931, and J2953.
Data Sets - Support Documents
|Unnamed Dataset 1|
|Unnamed Dataset 2|
|TABLE 1||DETECT AC PRESENT - INPUT/OUTPUT FLOWS|
|TABLE 2||SWITCH AC ON/OFF - INPUT/OUTPUT FLOWS|
|TABLE 3||1.3-S1: CONVERSION MODE PAT|
|TABLE 4||1.3-S2: PULSE MODE PAT|
|TABLE 5||1.3-S3: VOLTAGE MODE PAT|
|TABLE 7||CONVERT AC-TO-AC - INPUT/OUTPUT FLOWS|
|TABLE 8||TIME TO STEADY-STATE|
|TABLE 9||MINIMUM CONVERSION POWER AND MAXIMUM STAGE POWER STEP|
|TABLE 10||PASS AC POWER - INPUT/OUTPUT FLOWS|
|TABLE 11||MODULATE AC POWER - INPUT/OUTPUT FLOWS|
|TABLE 12||CONVERT AC-TO-DC VOLTAGE INPUT/OUTPUT FLOWS|
|TABLE 13||CONVERT AC-TO-DC POWER INPUT/OUTPUT FLOWS|
|TABLE 14||MAXIMUM RATIO OF RMS TO AVERAGE POWER|
|TABLE 15||SWITCH DC ON/OFF INPUT/OUTPUT FLOWS|
|TABLE 16||DETECT DC PRESENT INPUT/OUTPUT FLOWS|
|TABLE 17||DETECT SWITCHED AC PRESENT INPUT/OUTPUT FLOWS|
|TABLE 18||DETECT SWITCHED DC PRESENT INPUT/OUTPUT FLOWS|
|TABLE 19||2-S1: TRANSFER READY DT|
|TABLE 20||2-S2: AC SWITCH REQUEST DT|
|TABLE 21||2-S3: VENT REQUEST DT|
|TABLE 22||2-S4: DC SWITCH REQUEST DT|
|TABLE 25||UTILITY RECOVERY DELAY - INPUT/OUTPUT FLOWS|
|TABLE 26||DETERMINE VENTILATION FAULT - INPUT/OUTPUT FLOWS|
|TABLE 27||IDENTIFY EVSE LOCATION - INPUT/OUTPUT FLOWS|
|TABLE 29||3.0-S1: VOLTAGE MODE PAT|
|TABLE 30||3.1-S1: CONVERSION IDENTIFICATION PAT|
|TABLE 31||3.1-S2: CONVERSION SELECTION PAT|
|TABLE 32||SELECT POWER STAGE INPUT/OUTPUT FLOWS|
|TABLE 33||IDENTIFY STAGE DESIGN RANGE - INPUT/OUTPUT FLOWS|
|TABLE 34||MINIMUM STAGE POWER VALUES|
|TABLE 35||MAXIMUM STAGE POWER VALUES|
|TABLE 36||SELECT CONVERSION CONTROL - INPUT/OUTPUT FLOWS|
|TABLE 37||IDENTIFY EVSE CONFIGURATION - INPUT/OUTPUT FLOWS|
|TABLE 38||SELECT TRANSFER TYPE - INPUT/OUTPUT FLOWS|
|TABLE 39||TRANSFER TYPE OPTIONS|
|TABLE 40||TRANSFER TYPE DEFINITION|
|TABLE 41||VALIDATE TRANSFER TYPE - INPUT/OUTPUT FLOWS|
|TABLE 42||IDENTIFY CONVERSION POWER RANGE - INPUT/OUTPUT FLOWS|
|TABLE 44||VALIDATE MAXIMUM TRANSFER POWER - INPUT/OUTPUT FLOWS|
|TABLE 45||DETERMINE INPUT CURRENT LIMIT - INPUT/OUTPUT FLOWS|
|TABLE 46||DETERMINE MAXIMUM POWER LEVEL - INPUT/OUTPUT FLOWS|
|TABLE 47||DETERMINE MAXIMUM POWER LEVEL MANDATE - INPUT/OUTPUT FLOWS|
|TABLE 49||DETERMINE ENERGY TRANSFER STATUS - INPUT/OUTPUT FLOWS|
|TABLE 50||USAGE_MODE DEFINITION|
|TABLE 51||CONTROL POWER CONVERSION OF ELECTRICAL ENERGY - INPUT/OUTPUT FLOWS|
|TABLE 52||ALLOCATION TO FUNCTIONAL GROUP #1 (FG#1)|
|TABLE 53||ALLOCATIONS TO FUNCTIONAL GROUP #2 (FG#2)|
|TABLE 54||ALLOCATIONS TO FUNCTIONAL GROUP #3 (FG#3)|
|TABLE 55||ALLOCATIONS TO FUNCTIONAL GROUP #4 (FG#4)|
|TABLE 56||CONTROL PILOT DATA INTERFACE FLOWS|
|TABLE 57||DATA DICTIONARY|
The Hybrid Technical Standards Committee reports to the Powertrain Systems Group of the Motor Vehicle Council. The Committee is responsible for developing and maintaining SAE Standards, Recommended Practices, and Information Reports related to the field of hybrid vehicle technology. The following topics are within the scope of this committee's work: ¿ safety aspects of hybrid systems in vehicles ¿ test procedures to establish the performance of hybrid systems and components ¿ nomenclature ¿ vehicle interface and serviceability requirements Participants in the SAE Hybrid Technical Standards Committee include OEMs, suppliers, consulting firms, government, and other interested parties.
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