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EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
The Development of the SAE J1772 Standard of Electric Vehicle Charger
It’s undeniable that electric vehicles are slowly gaining popularity among consumers worldwide. With that, the demand for electric vehicle chargers has also increased. However, before the availability of electric vehicle chargers, the issue of charging compatibility in the market had to be addressed. This is where the SAE J1772 standard comes into the picture. In this article, we’ll take a closer look at the development of the SAE J1772 standard of electric vehicle charger.
Introduction to SAE J1772
SAE J1772, which stands for Society of Automotive Engineers (SAE) standard J1772, is a North American standard for electrical connectors for electric vehicles (EVs). This standard establishes requirements for communication between the electric vehicle and the charging station. The standard ensures the safe and reliable transfer of electricity from the power grid to the electric vehicle.
Development and History of SAE J1772
The development of the SAE J1772 standard began in 1996, when General Motors and the utility company, Southern California Edison, started working on a standardized connector for EVs. The main goal was to design a connector that would be compatible with all electric vehicles, regardless of the brand. It took nearly 15 years for the SAE J1772 standard to be agreed upon and implemented.
SAE J1772 Versions
There are two versions of the SAE J1772 standard- Level 1 and Level 2. The Level 1 charging system is a standard household outlet (120-volt). On the other hand, Level 2 charging system requires a dedicated 240-volt circuit, which is similar to what’s used for some home appliances. This level of charging provides a much faster charging speed compared to Level 1.
Features of SAE J1772 Connector
The SAE J1772 connector has five conductors- two for power, two for communication, and one for a signal pilot. The power conductors are for direct current (DC) and alternate current (AC) supply. The communication conductors allow for the EV and charging station to communicate various information, such as the vehicle’s state of charge, which helps avoid charging errors. The signal pilot is used during the charging process to detect communication between the vehicle and charging station.
Safety Measures
The SAE J1772 standard also outlines safety measures to avoid any possible electrical hazards during the charging process. For instance, the connector is designed with a safety mechanism integrated into the lock, which ensures that the connector cannot be removed until the charging process is complete. Additionally, an interlock prevents energization of the connector until it is properly mated with the electric vehicle.
Conclusion
The SAE J1772 standard of electric vehicle charger is a significant development in the spread of electric vehicles. This standard is established to provide a way for all electric vehicles to be charged safely and reliably. The development of this standard had to go through various stages to ensure that it was feasible and safe. The standard has features that make the charging process more straightforward and safe. The future of electric vehicles relies heavily on developments like SAE J1772, and this standard has opened the door for more electric vehicles to be produced with an increased confidence among consumers.
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