The Society of Automotive Engineering (SAE) defines the general physical, electrical, communication, and performance requirements for EV charging systems used in North America, as part of the SAE J1772 standard. Below are the current charging levels that are practiced in the North American market.
SAE J1772 (Type 1) is a single-phase connector and is a standard for EVs in North America and Japan. It allows you to charge your car at a rate of up to 19.2 kW. Of course, this is contingent on the compacity of your car’s onboard charger, voltage, and amperage grid capability.
Charging “levels” are specific to SAE J1772 and are used to categorize the rated power, voltage, and current of the charging system. The evolving standard currently has 2 different EV charging levels for AC Charging.
IEC 62196 Plugs, socket-outlets, vehicle connectors and vehicle inlets – Conductive charging of electric vehicles is a series of international standards that define requirements and tests for plugs, socket-outlets, vehicle connectors and vehicle inlets for conductive charging of electric vehicles. (“IEC 62196 – Wikipedia”)
IEC 62196 (Type 2) connectors have three additional wires allowing for triple-phase power and current providing for higher charging rates when compared to single-phase SAE J1772 Type 1 connectors. For residential charging, the highest charging rate is 19.2 kW, while charging stations can achieve charging rates of up to 43 kW. Again, this is dependant on the compacity of your car’s on-board charger, as well as the your scenarios voltage and amperage grid capability.
GB/T 20234 Plugs, socket-outlets, vehicle connectors, and vehicle inlets – Conductive charging of electric vehicles is a series of international standards that define requirements and tests for plugs, socket-outlets, vehicle connectors, and vehicle inlets for conductive charging of electric vehicles.
The AC standard (GB/T 20234.2) EV connector and inlet use the same interface connector as the European IEC 62196-2 Type 2 connectors but the gender of the GB/T 20234.2 connector and inlet has been reversed. GB/T 20234.2 specifies a male connector and female vehicle inlet. Like IEC 62196-2 Type 2 EVSE Outlets and Plugs, GB/T 20234.2 also specifies a female Charging Station Outlet and a male Charging Station plug. Furthermore, GB/T 20234.2 uses CC/CP (charging confirmation and control pilot) signals. IEC 62196-2 specifies PP/CP (proximity pilot and control pilot) signaling.
It allows mode 2 (250 V) or mode 3 (440 V) single-phase AC charging at up to 8 or 27.7 kW, respectively. In Mode 2, power is supplied with a current of 10/16/32A and a voltage of 250V. In Mode 3, power is supplied with a current of 16/32/63A and a voltage of 440V. Although the seven-pin interface does support three-phase AC power, KST’s current product offering only supports single-phase power.
In general, charging speeds are also limited by the vehicle’s onboard charger, which is usually less than 10 kW. The onboard charger converts the AC input power to DC.