‘Developed in a Consensus Environment by More than 190 Experts’
SAE International has released its expected technical standard for fast-charging of electric vehicles, augmenting the existing J1772 standard for AC charging with a protocol for high-voltage DC equipment that can reduce charging time to as little as 20 minutes.
The standard for the new “Combo” connector, which adds an optional module to the existing J1772 connector, was “developed in a consensus environment by more than 190 global experts representing automotive, charging equipment, utilities industries and national labs,” SAE says.
“This new technical standard is a real game-changer,” SAE industry relations and business development director Andrew Smart said in a release. “It reflects the advancements in technology within PHEV and EV engineering and we are pleased to represent the collaborative efforts within industry that made it possible.”
‘Helps Vehicle Electrification Technology Move Forward’
The standard “represents the future of charging technology and smart grid interaction, while addressing the needs of today,” the organization said. These include reduced public charging times, allowing consumers to travel greater distances in their electric vehicles and plug-in hybrid electric vehicles.
“This new standard reflects the many hours that top industry experts from around the world worked to achieve the best charging solution – a solution that helps vehicle electrification technology move forward,” said GM’s Gery Kissel, engineering specialist for global battery systems and SAE J1772 task force chair.
“We now can offer users of this technology various charging options in one combined design,” Kissel said in the SAE announcement.
SAE notes that the original version of J1772 defined AC Level 1 and AC Level 2 charge levels and specified a conductive charge coupler and electrical interfaces for AC Level 1 and AC Level 2 charging. The new revision incorporates DC charging. It was developed “in cooperation with the European automotive experts who also adopted and endorsed a combo strategy in their approach,” SAE says.
Nissan, meanwhile, offers a separate port for DC fast-charging the Leaf battery car. Mitsubishi has also gone with the Japanese “Chademo” fast-charge protocol (F&F, January 11, 2010).
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Source: SAE International with Fleets & Fuels follow-up