The Society of Automotive Engineers (SAE) J1772 Standard in North America is at the forefront of efforts to standardize charging. All major vehicle and charging system manufacturers support this standard, which should eliminate drivers’ concerns about whether their vehicle is compatible with the infrastructure.
The Underwriters Laboratories verified the safety and durability of the SAE J1772 connector in 2009. The SAE J1772 Standard, which was adapted on January 14, 2010, is for electrical connections for electric vehicles, and details the physical and electric characteristics of both the charge system and coupler.
This Standard defines a five-pin configuration for the connector used for Level 1 and Level 2 charging. The connector is designed to survive more than 10,000 connection and disconnection cycles. Level 3 configurations are currently under development, as is a Direct Current fast charging configuration.
Manufacturers are already introducing charging stations that are compliant with current standards. For instance, Coulomb Technologies of the United States retails commercial and residential charging stations that are compliant with the J1772 Standard.
IA-HEV Work on Charging Standards
Task 15, Plug-in Hybrid Electric Vehicles, held a November 2009 workshop titled “Grid-Connected Vehicles and Renewable Energy Workshop—Exploring Synergies” that was conducted in Frederica, Denmark. The focus of this workshop was to understand how different electricity systems around the world will provide or acquire power to and from grid-connected vehicles, and to learn about different approaches to better take advantage of opportunities plug-in vehicles present. Workshop findings included the integration of renewable energies in existing grids varies between regions. Countries with an above-average renewable energy capacity were considered more ready to provide “green” electricity to these vehicles. Additionally, a “smart grid” system was seen as essential to managing electricity loads effectively.