Global standard developing association SAE International has released the J2954 wireless charging standard for electric vehicles on October 22 that took more than a decade in development.
The official release by SAE International notes that it is the first global wireless charging standard that specifies both the electric vehicle and supply equipment (EVSE) ground-system requirements for wireless charging of electric vehicles.
The SAE J2954 wireless charging standard enables light duty electric vehicles and infrastructure to safely charge up to 11kW, over an air gap of 10 inches (250 mm) achieving up to 94 percent efficiency.
The single document defines the acceptable criteria for interoperability, electromagnetic compatibility, EMF, minimum performance, safety, and testing for wireless power transfer (WPT) of light duty plug-in electric vehicles.
Currently, SAE J2954 wireless charging standard are about:
One-way wireless charging (“unidirectional”) from the grid to the vehicle
(bidirectional energy transfer may be evaluated for a future standard)
Stationary application (charging while vehicle is not in motion)
(dynamic applications may be considered in the future)
Only above-ground (surface mounted) installations are covered
(flush mounted installations have been discussed but are not yet ready for inclusion)
Home and Public charging
Enables alignment for manual/autonomous parking
Power levels:
WPT1: 3.7 kW
WPT2: 7 kW
WPT3: 11 kW
No announcements for the WPT4 (22 kW).
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.
