GB/T Charging Standard
GB/T charging standards are China's recommended national standards for conductive electric-vehicle charging interfaces, connections, and communication; GB identifies a national standard, while /T denotes a recommended rather than mandatory standard. The phrase GB/T connector is useful shorthand, but it can hide several separate standards and generations.
Standards in the family
The GB/T 20234 family defines conductive connection interfaces. GB/T 20234.1 contains general requirements, GB/T 20234.2 covers AC interfaces, GB/T 20234.3 covers the established DC interface, and GB/T 20234.4 defines a newer large-power DC interface associated with ChaoJi. Related standards, including the GB/T 27930 family, define communication between off-board DC charging equipment and the vehicle's battery-management system. China MIIT — Release of four revised conductive charging interface standards
Legacy GB/T DC and the newer GB/T 20234.4 interface are not the same connector. A physical adapter also cannot by itself reconcile differences in communication, voltage range, current capacity, locking, safety logic, or regional vehicle configuration. Compatibility claims should name the interface, standard edition, vehicle, charger, and supported functions.
GB/T AC and DC interfaces are used primarily in China and in some vehicles or infrastructure intended for Chinese-standard markets. For a comparison with CCS, J3400, CHAdeMO, Type 1, Type 2, and other interfaces, see EV Charging Connectors and Inlets.