SAE J2954/2 Wireless Power Transfer & Alignment for Heavy Duty Applications
SAE J2954/2 establishes an industry-wide specification guideline that defines acceptable criteria for the interoperability, electromagnetic compatibility, minimum performance, safety, and testing for wireless power transfer for high power wireless charging of BEV and PHEV vehicles, for heavy-duty, off-road and equipment applications (defined as HD). HD WPT Power Classes for heavy duty vehicles and equipment applications according to category will be defined above SAE J2954. In addition, HD Vehicle to Ground Assembly (GA) alignment is also included. SAE J2954/2 will be harmonized wherever possible) with SAE J2954.
Rationale: Electrified powertrains, specifically heavy-duty battery electric and plug-in electric (HD BEV/PHEV) vehicles, are projected to become more prevalent in production internationally due to environmental factors (such as GHG, CO2 emissions), regulations (such as the EU, China, U.S. EPA regulations, and the California ZEV mandates), as well as the increasing price of fossil fuels. The main benefits of electrified powertrains are eliminating or significantly reducing local emissions while increasing the overall well-to-wheels efficiency. In addition, automated vehicles are soon to be more commonplace to allow more convenient and safer transportation, especially in traffic settings and long-distance driving.
Standardized HD wireless power transfer (HD WPT, also called wireless charging) allows the BEV/PHEV customer an automated, seamless, and more convenient alternative to plug-in (conductive) charging. Essentially, the HD customer simply needs to park in an SAE J2954-2 compatible parking space in order to charge the vehicle. HD WPT offers the additional advantage to automated vehicles enabling autonomous parking with alignment assistance and automated charging (in all weather conditions, such as rain or snow).
This standard is an evolution of SAE J2954, which is based on actual light duty bench testing and vehicle interoperable data taken around the world. SAE J2954 is meant to harmonize with standards developing organizations in order to make a world-wide WPT standard up to 500kW, useful for HD commercial applications. The SAE Task Force (TF) harmonized with numerous standard organizations (AAMI, ANSI, CISPR, GB, ISO, IEC, UL, VDA) towards these goals. The SAE J2954 TF has worked directly with government agencies to gain feedback (U.S. DOE, U.S. FCC, U.S. FDA) and testing actual light duty systems both in government laboratories and private. It is essential that data-based standards are used as a basis for commercialization of this technology.