ChaoJi (CHAdeMO 3.1)
The ChaoJi connector (also known as CHAdeMO 3.1) is a next-generation ultra-high power charging standard, which is not currently in use yet. (Click here for the full list of all countries and the charging connectors they use.)
Last updated: 23 January 2026
The connector shape is a lemniscate shape (∞) with a flat bottom end and a vehicle-side locking mechanism. It is capable of delivering up to 600 amps at 1500 volts DC, resulting in a maximum output of 900 kW. ChaoJi requires liquid-cooled cables to avoid damage caused by overheating. Inside those cables there are circulation channels containing a liquid coolant that absorbs and dissipates heat. The liquid cooling process involves a closed-loop system in which the coolant travels back and forth between the connector and the cooling unit of the charger.
The connector supports bidirectional charging, allowing EVs to send power back to the home, the grid, appliances or another vehicle, turning the car’s battery into a backup power source.
Since ChaoJi is for DC charging only, this means that every EV that comes with that standard will typically have two charging ports: a female ChaoJi inlet for DC charging and another one for AC charging (i.e. Type 1, Type 2 or GB/T AC). Needing two inlets may be impractical, so a combined ChaoJi/Type 2 connector has also been developed and it is only slightly larger than a CCS vehicle connector.
The Ultra-ChaoJi connector, with two additional high power pins at the base, is expected to be used in electrified heavy-duty vehicles, aircraft, and ships.
A new connector named Ultra-ChaoJi is currently under development. It has additional power pins on top of the standard ChaoJi pinout. Ultra-Chaoji is expected to be used in electrified heavy-duty vehicles, aircraft, and ships in the near future.
The ChaoJi standard is co-developed by the China Electricity Council (CEC) and the Japanese CHAdeMO Association, who hope to turn ChaoJi into the accepted global DC charging standard in the future. That is why they have made the design backwards compatible with CHAdeMO (used in Japan), GB/T DC (used in China), CCS 1 (used in North and Central America) and CCS 2 (used elsewhere in the world).
