June 19, 2020 witnessed the China-Japan joint online press conference to announce the progress of the next generation electric vehicle (EV) charging technology. At the event, State Grid and CHAdeMO Association of Japan (EV Fast Charging Organization of Japan) issued the white paper on ChaoJi EV conductive charging technology and CHAdeMO 3.0 protocol. The China Electricity Council (CEC) and the CHAdeMO Association initiated the joint research on the industrial development of ChaoJi, which marked the maturity of the charging technology and its entry into a new stage of standard formulation and industrial application.

The next generation ChaoJi technology is a complete set of DC EV charging system solution. It makes comprehensive improvement in charging safety, charging power, structural design, backward compatibility, and future applications, addressing problems in existing charging systems worldwide. The current tests with electric vehicles show that the ChaoJi technology realizes a max current of 360 amps with an expected power of 900 kW, enabling a 400-kilometer mileage after only 5-minute charging. Such a technology enjoys vast prospects for application, and can be adopted to heavy-duty vehicles while serving mainstream passenger vehicles.

The ChaoJi white paper reviews the research background, updates current status, introduces the technical schemes for charging system, communication protocol and connection assembly of the next generation ChaoJi, and puts forward plans for technical standards and industrial development. Experts from both China and Japan believed that the document presented the world with a complete, fast, safe, compatible, and low-cost charging system solution, which would accelerate the process to make ChaoJi mature and international, reduce R&D costs for EV, expand EV penetration, and make it more friendly to users. Ouyang Minggao, an academician of Chinese Academy of Sciences and professor of Tsinghua University, said that ChaoJi would play an active role in solving problems on safety and durability of EV charging.

In March 2016, State Grid together with the CEC launched the pre-research of high-power charging technology in China. On the first international conference on new charging interface project held in July 2019, the technical scheme of the next generation charging interface proposed by China was officially named as “ChaoJi”, which was widely recognized by experts from such countries and regions as the United States, Europe, and Japan. Based on the same technical route, Japan has developed the next generation charging standard CHAdeMO 3.0 protocol.

The press conference also kicked off the formulation and revision of two Chinese national standards for EV conductive charging system. Representatives from governments and peers in China and Japan expressed that they would further enhance their pragmatic cooperation, work together to create a favorable industrial ecology for ChaoJi, promote the technology upgrading and internationalization, and jointly make ChaoJi a harmonized compatible international standard.

Source: State Grid News