SAE International Publishes Updated Standard For On-Route Mechanized Conductive EV Charging Systems For Buses

SAE International Publishes Updated Standard For On-Route Mechanized Conductive EV Charging Systems For Buses
Written By Justin Falce

SAE J3105 Standard Promotes the Safe Testing and Performance of Mechanized Conductive Power Transfer Systems

SAE International, announced today it has published its latest standard, SAE J3105®: Electric Vehicle Power Transfer System Using Conductive Automated Connection Devices, along with three new tributary documents. The standard covers the general physical, electrical, functional, testing, and performance requirements for a mechanized (hands-free) conductive power transfer system primarily for transit buses using an overhead coupler capable of, but not limited to, transferring direct current (DC) power.

According to a report published in 2019 by P&S Intelligence, the U.S. electric bus market size is projected to reach $1,948.5 million by 2024. The market growth is primarily driven by several federal, regional, and state grants and incentive programs. In addition, low cost of ownership, coupled with low maintenance cost of electric buses, specially battery electric buses (BEB) is expected to benefit the market during the forecast period.

As the market expands, the need for the continued standardization of DC power distribution remains, and SAE J3105 addresses the many interfaces required to ensure power delivery is consistent. SAE J3105 defines a conductive power transfer method, including the curbside electrical contact interface, the vehicle connection interface, the electrical characteristics of the DC supply and the communication system. It also covers the functional and dimensional requirements for the vehicle connection interface and supply equipment interface.

“SAE International remains focused on advancing mobility solutions for the benefits of humanity, so as the electric bus market expands in the United States, it is imperative that we modify our standards and approach to ensure safe and reliable usage.” Jack Pokrzywa, SAE International

“SAE International remains focused on advancing mobility solutions for the benefits of humanity, so as the electric bus market expands in the United States, it is imperative that we modify our standards and approach to ensure safe and reliable usage,” said Jack Pokrzywa, Director of Global Ground Vehicle Standards, SAE International. “SAE J3105 will guide this burgeoning industry to safe and efficient charging solutions that minimize downtime and promote long-term performance for heavy duty applications.”
The publication of the SAE J3105 Standard was published by SAE International’s Hybrid EV group and is accompanied by three supporting documents that detail the connections in J3105:

• SAE J3105/1™: Infrastructure-Mounted Cross Rail Connection covers the connection interface relevant requirements for an electric vehicle power transfer system using a conductive automated connection device based on a cross-rail design.
• SAE J3105/2™: Vehicle-Mounted Pantograph Connection covers the connection interface relevant requirements for an electric vehicle power transfer system using a conductive automated charging device based on a conventional rail vehicle pantograph design.
• SAE J3105/3™: Enclosed Pin and Socket Connection covers the main safety and interoperability relevant requirements for an electric vehicle power transfer system using a conductive automated charging device based on an enclosed pin and socket design.

More information on SAE J3105 is available at http://www.sae.org/standards/content/j3105_202001/.

Informazioni su SAE International
SAE International è un'associazione globale impegnata a far progredire le conoscenze e le soluzioni per la mobilità a beneficio dell'umanità. Coinvolgendo quasi 200.000 ingegneri, esperti tecnici e volontari, mettiamo in contatto e formiamo i professionisti della mobilità per consentire soluzioni di mobilità sicure, pulite e accessibili. Agiamo su due priorità: incoraggiare una vita di apprendimento per i professionisti dell'ingegneria della mobilità e definire gli standard per l'ingegneria del settore. Ci impegniamo per un mondo migliore attraverso il lavoro della nostra fondazione filantropica SAE, che comprende programmi pluripremiati come A World in Motion® e la Collegiate Design Series™. Per saperne di più http://www.sae.org.