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| SAE J1772 | |
|---|---|
| Title | SAE J1772 |
| Abbreviation | J1772 |
| Organization | Society of Automotive Engineers |
| First published | 2001 |
| Latest revision | 2021 |
| Scope | Electric vehicle conductive charging |
| Country | United States |
SAE J1772 is an electric vehicle conductive charging standard developed to define physical connectors, electrical characteristics, communication signaling, and safety requirements for electric vehicle supply equipment and vehicle inlets. It serves as a normative basis for interoperable charging between passenger vehicles, plug-in hybrids, charging stations, and energy infrastructure across multiple markets. The standard interfaces with regional regulations and industry actors to harmonize charging practices for automakers, utilities, and charging network operators.
SAE J1772 provides a unified specification used by General Motors, Ford Motor Company, Tesla, Inc. (for adapters), Nissan, BMW, Daimler AG, Toyota Motor Corporation, Volkswagen Group, Hyundai Motor Company, Kia Corporation, Renault, Mitsubishi Motors, Honda, Mazda Motor Corporation, Subaru Corporation, Jaguar Land Rover, Volvo Cars, Stellantis, Lucid Motors, Rivian Automotive, Lotus Cars, Fisker Inc., BYD Company, SAIC Motor, Geely Automobile Holdings, Tata Motors, Mahindra & Mahindra, NIO Inc., XPeng Motors, Li Auto and charging providers such as ChargePoint, Electrify America, EVgo, Shell Recharge, BP Pulse, IONITY, Enel X, Schneider Electric, Siemens, ABB Ltd., Delta Electronics, Eaton Corporation and Bosch (company) to ensure connector interoperability and user safety. The specification aligns with regulatory frameworks from United States Department of Transportation, California Air Resources Board, National Highway Traffic Safety Administration, Canadian Standards Association, European Committee for Electrotechnical Standardization, International Electrotechnical Commission, Ministry of Industry and Information Technology (China), Japanese Ministry of Economy, Trade and Industry and industry consortia like CHAdeMO Association and CharIN.
SAE J1772 originated from work by the Society of Automotive Engineers technical committees responding to early electrification initiatives led by California Air Resources Board mandates and pilot programs from Department of Energy (United States). Initial documents in 2001 followed demonstrations by General Motors' EV1, development by Toyota Motor Corporation and research at Sandia National Laboratories, Argonne National Laboratory, Oak Ridge National Laboratory and university programs at Massachusetts Institute of Technology, Stanford University, University of Michigan, University of California, Davis and Georgia Institute of Technology. Subsequent revisions incorporated lessons from deployments by Nissan Leaf rollouts, regulatory updates from National Institute of Standards and Technology, and harmonization efforts with IEC 62196 spearheaded by International Electrotechnical Commission panels and professional societies including IEEE working groups. Collaborations with automakers, utilities such as Pacific Gas and Electric Company, Edison International, National Grid (United Kingdom), and charging networks refined safety and communication features in later 2009 and 2017 revisions.
The specification defines electrical parameters, pin assignments, insulation levels, current ratings, thermal limits, and environmental durability tested to standards like IEC 60529 and ISO 16750. It specifies single-phase and three-phase alternating current conductors, nominal voltages used in regions associated with North American Electric Reliability Corporation, European Network of Transmission System Operators for Electricity, and grid characteristics of utility partners. Requirements reference materials and mechanical tests informed by manufacturers such as TE Connectivity, Amphenol Corporation, Molex, Hella GmbH & Co. KGaA and standards bodies including Underwriters Laboratories, CSA Group, TÜV SÜD, TÜV Rheinland, and Bureau Veritas.
The mechanical configuration uses a round, five-pin interface including protective earth, two power conductors, a control pilot, and a proximity pilot. Design influences include industrial connector engineering from IEC 62196 and ergonomic studies by designers affiliated with Fisker Automotive and research groups at Clemson University and University of Warwick. Components are produced by suppliers such as TE Connectivity, Amphenol, Molex, HARTING Technology Group, and JAE Electronics meeting ingress protection ratings and mechanical endurance defined by ISO 9001 manufacturing practices.
J1772 supports Level 1 (120 V AC) and Level 2 (208–240 V AC) charging power levels used in deployments by fleet operators like United Parcel Service and transit agencies including Metropolitan Transportation Authority (New York) and Transport for London where adapters and station designs interface with higher-power DC fast charging networks like CHAdeMO, Combined Charging System, GB/T (standard) and proprietary systems by Tesla Supercharger. Power control strategies coordinate with smart charging programs from Edison Electric Institute, demand response pilots by Iberdrola, and vehicle-to-grid research at Nuvve Corporation and academic partners.
Safety features integrate interlock, isolation monitoring, and signaling using the control pilot and proximity pilot pins interoperating with vehicle charge controllers developed by suppliers such as Danfoss, Infineon Technologies, NXP Semiconductors, Microchip Technology and software stacks influenced by AUTOSAR architecture and cybersecurity guidance from National Institute of Standards and Technology. Protocol interactions reference electromagnetic compatibility standards from IEC committees, and testing often performed at facilities accredited by Underwriters Laboratories or CSA Group.
The specification became a de facto standard across North American and parts of Asian markets and influenced regional adoption in coordination with California Air Resources Board mandates, procurement policies of municipalities like City of Los Angeles, New York City, and corporate fleets at Amazon (company), Walmart Inc., IKEA, and FedEx. Harmonization efforts involve International Electrotechnical Commission, European Committee for Electrotechnical Standardization, CharIN, automaker alliances, and national regulators to bridge differences with IEC 62196, GB/T, CHAdeMO, and Combined Charging System. Continued revisions and industry collaborations aim to align vehicle designs from legacy manufacturers and new entrants such as Tesla, Inc. and Rivian Automotive with charging networks operated by ChargePoint, Electrify America, and utilities.
Category:Electric vehicle standards