https://en.wikipedia.org/wiki/GB/T_charging_standard
The AC standard (GB/T 20234.2) uses male and female connectors physically compatible with the European
Type 2 connector, but with different configurations and signaling. While the European implementation of Type 2 (IEC 62196-2 Type 2) uses a female
connector and male
vehicle inlet, GB/T 20234.2 specifies a male
connector and female
vehicle inlet. Both IEC 62196-2 Type 2 and GB/T 20234.2 specify a female
socket outlet and male
plug. In addition, GB/T 20234.2 uses CC/CP (charging confirmation and control pilot) signals, instead of PP/CP (proximity pilot and control pilot) signaling.
[5]
For the male
plug and
connector ends, the shape is a flattened circle with a nominal outer diameter of 51 mm (2.0 in); the flattened section reduces this to 44 mm (1.7 in), measured top to bottom.
[5]: 8
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 voltage of 250V. In Mode 3, power is supplied with a current of 16/32/63A and voltage of 440V.
[6] Although the seven-pin interface is capable of passing three-phase AC power, the current implementation is limited to single-phase power.
[2]
In general, charging speeds are also limited by the vehicle's on board charger, which is usually less than 10 kW. The on-board charger converts the AC input power to DC
The DC fast charging standard (GB/T 20234.3) uses a different, larger connector and allows for fast charging at up to 250 kW, with current of 80/125/200/250A, and voltage of 750-1000V.
[7]: 36 However, 50 kW or other lower rated power chargers are more commonly seen, typically retaining the minimum GB/T voltage of 750V but with different current ratings. Some chargers may also follow the physical plug specified by GB/T 20234.3 but not the GB/T standard power limits by using a lower voltage than 750V, such as 500V.
The male vehicle connector has a flattened circular shape similar to that of the Type 2 connector used for single-phase AC charging. The DC charging connector specified in GB/T 20234.3 has a nominal outer diameter of 65 mm (2.6 in); the flattened top reduces the top-to-bottom height to 60.8 mm (2.39 in).
[2] There are four pins for signaling: two to provide charging confirmation (CC1 / CC2) and two for communication via
CAN bus (S+ / S-). In addition, the GB/T 20234.3 connector provides up to 600 W of auxiliary DC power at 30V/20A (A+ / A-).
[2][5]
As of December 2019, 40% of all electric vehicles sold to date with DC fast charging capability were equipped with GB/T 20234.3 inlets, a plurality compared with the next-most prevalent (Tesla's proprietary inlet, with 19% share), reflecting the scale of the EV market in China. CCS (Combo1 + Combo2) was in third place, with a 17% share including European Tesla vehicles equipped with CCS Combo2 ports, followed closely by CHAdeMO (15%).
[8]
