China has been rapidly switching over to Electric vehicles with Chinese and other national vehicles are increasing their presence in the Electric vehicle market of China and with increasing demand, the nation is also improving its charging infrastructure.
The China Electricity Council (CEC) has now approved and published a set of national standards for wireless charging of electric vehicles that will be based on the magnetic resonance technology developed and patented by WiTricity, a wireless power transfer specialist based in Massachusetts, USA.
Absence of regularity was always a major obstruction to expand the presence of wireless charging for EVs, but with the addition of standards possibly a general solution for all EVs will be available not only in China but the whole world.
The published document reads:
“For the past four years, WiTricity has been actively involved in the Chinese EV wireless charging standardization process through its work with China Electric Power Research Institute (CEPRI), China Automotive Technology and Research Center (CATARC) and the CEC. With a global IP portfolio of over 1400 issued and pending patents, WiTricity has declared twenty Chinese patents as “standards essential” to systems implementing the GB standard.
Chinese automakers and their Tier 1 suppliers rely on the GB standard committee to define the EV wireless charging solution to be deployed in China. The ratified standard is now a major market enabler for deployment on vehicles and in public charging infrastructure. WiTricity has worked closely with the GB standard committee on several significant technical matters, including efforts to harmonize the China standard with other international standards (SAE J2954, ISO 19363, IEC 61980) that will be published in 2020 and 2021.”
The new standard is described in four parts of the GB / T 38775 document:
GB / T 38775.1 “Wireless Charging System for Electric Vehicles Part 1: General Requirements”
GB / T 38775.2 “Wireless Charging System for Electric Vehicles Part 2: Communication between On-board Chargers and Charging Equipment”
GB / T 38775.3 “Electric Vehicle Wireless Charging System Part 3: Special Requirements”
GB / T 38775.4 “Electric Vehicle Wireless Charging System Part 4: Electromagnetic Environment Limits and Test Methods”
WiTricity has been working with Chinese automakers and Tier-1 suppliers from past several years and two companies in China already have license for its technology:
- Zhejiang VIE Science & Technology Co., Ltd. subsidiary (VIE)
- Anjie Wireless Technology (Suzhou) Co. Ltd. (Anjie)
Anije has demonstrated its wireless charging technology with Xpeng Motors while VIE already has a pilot production facility of wireless charging systems for OEMs.
There is a question related to pricing of the system and efficiency as the necessity to transfer power over the air usually translates to additional energy loss.