FAQs about latest CHAdeMO 3.0 and next-gen ChaoJi EV Charging standard

On 24 April 2020, CHAdeMO Association released the latest CHAdeMO 3.0 protocol specifying the requirements for designing the next-generation CHAdeMO chargers using a brand new, identical plug with China’s GB/T protocol. The Chinese version, operating under the GB/T communication protocol, is also planned to be released next year.

This article will look into 

What is CHAdeMO 3.0 protocol?

What is ChaoJi and why is it needed?

How does it compare to previous CHAdeMO versions?

Will India participate in the advancement of this pioneering charging technology?

When will CHAdeMO 3.0 powered vehicles hit the road?

What is the CHAdeMO 3.0 protocol?

CHAdeMO 3.0 is the first publication of the CHAdeMO-side protocol for next generation ultra high power EV charging standard called ChaoJi. The Chinese version of Chaoji (under the GB/T communication protocol) is expected to be released in 2021.

CHAdeMo 3.0 plug
CHAdeMO 3.0 Plug | Source – CHAdeMO website

Backward Compatibility – CHAdeMO 3.0 compliant vehicles will be backward compatible with existing fast charging standards (CHAdeMo, GB/T and possibly CCS), i.e. today’s DC chargers will be able to charge the new ChaoJi EVs using an adaptor.

CHAdeMo-ChaoJi inlet adaptor
CHAdeMO-ChaoJi inlet adaptor | Source – CHAdeMO website

Existing CHAdeMO and GB/T EVs are not allowed to use any adapters, so they will need to use the dual chargers during the transition period. Source

What is ChaoJi and why is it needed?

ChaoJi is the working name of CHAdeMO & GB/T-harmonised DC fast charging standard, that is currently under development by the CHAdeMO association in alliance with China Electricity Council (CEC). The project was started when China and Japan agreed to co-develop this charging technology, back in 2018.

China is the world’s largest EV market and is currently using the GB/T standard, whereas CHAdeMo (though present worldwide) has a monopoly in Japan. OEMs in the US and Europe mostly use CCS as fast charging standard. The main motivation behind the development of ChaoJi protocol is the much needed standardisation in the diverse charging standards.

Charging Standard Harmonization
Soure: CHAdeMO Association

Also Read: What is OCPP and what role does it play in EV charging?

How does CHAdeMO 3.0 compare to previous CHAdeMO versions?

CHAdeMO 3.0 will be able to support DC charging with power over 500 kW (maximum current 600 A), whereas existing CHAdeMo protocol can support a max charge rate of 400 kW (400A x 1kV).

Comparison of existing and new CHAdeMO 3.0 connectors

The latest connector is liquid cooled, lighter and compact than existing CHAdeMO connector (as seen in the picture above). The size has been reduced by removing the locking mechanism from the side of the connector.

CHAdeMO 3.0 features bi-directionality, i.e. not only can the electric vehicle battery be charged using this charging standard but the electric vehicle battery can also act as the power source and can supply to the power grid (V2G) or an establishment such as a home (V2H) or a shop.

Two months ago, a Nissan Leaf battery pack was used to power a 7/11 store in Japan and this is an excellent use case for V2X power transfer in case of an emergency or power outage, apart from more obvious utilisation of bi-directionality for peak load management and grid optimisation.

Will India participate in the advancement of this pioneering charging technology?

ChaoJi project has developed into an international collaboration with significant contributions from players in Europe, Asia, North America and Oceania. Successful demonstrations of the protocol have also been conducted in a test lab in Japan, according to a statement published by the CHAdeMO Association in February.

At present, the electric cars in India (Hyundai Kona, Tata Nexon EV and MG ZS EV) use the CCS 2 standard for DC fast charging. However, as per CHAdeMO website, India is expected to join other countries in supporting and helping develop the harmonised ChaoJi standard. So, we will watch the developments in the space to comment on India’s role.

When will CHAdeMO 3.0 powered vehicles hit the road?

The testing requirements for CHAdeMO 3.0 specification are expected to be issued within a year. The first batch of ChaoJi EVs will likely be commercial vehicles and are expected to be launched in 2021, followed by other vehicles including passenger EVs. The ultra-fast charging technology will be specifically useful for vehicle types such as electric buses and trucks that have large capacity battery packs and hence will benefit more from reduction in charging time. The high charge rate of ChaoJi standard will allow long range EVs to fully charge in 15 minutes, taking the experience of refuelling an EV closer to an ICE vehicle.

2 thoughts on “FAQs about latest CHAdeMO 3.0 and next-gen ChaoJi EV Charging standard

  • June 1, 2020 at 5:00 am
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    what would be cost and weight differences and any Standard operating procedures changes for CHAdeMO 3.0

    Reply
    • June 2, 2020 at 4:03 am
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      CHAdeMO 3.0 is lighter in weight and more compact in size as compared to earlier version (as shown in the picture included in the article above). Will update this space as more details are publicly released by the association.

      Reply

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