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EV charge time slashed with new auto connector spec

Posted: 17 Oct 2012     Print Version  Bookmark and Share

Keywords:EV  charge time  J1772 

According to the revised J1772 EV connector spec published by the Society of Automotive Engineers, electric vehicle charge times could be as short as 10 minutes.

The decade-old J1772 connector spec originally 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, announced Monday (October 15), incorporates DC charging, defining DC Level 1 and DC Level 2 charge levels, charge coupler and electrical interfaces.

Thanks to the addition of DC charging capability, the charging time can be cut to as short as 10-20 minutes, according to SAE.

The standard was developed in cooperation with the European automotive experts who also adopted and endorsed a combo strategy in their approach.

The charging configuration for DC Level 1 is 200-500V DC, up to 40kW (80A), delivering an estimating charging time (with a 20kW off-board charger) is 22 minutes for a plug-in hybrid and 1.2 hours for a battery EV.

For DC Level 2, the numbers are 200-500VDC, up to 100kW (200A) with an estimated charge time (45kW off-board charger) of 10 minutes for a PHEV and 20 minutes for an all-battery vehicle.

The new spec can be found at

Gery Kissel, GM Engineering Specialist and SAE J1772 Task Force Chairman, said, "We now can offer users of this technology various charging options in one combined design."

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