SAE International一支致力于电动汽车无线充电标准志愿标准工作组，近日就在无线充电的电源频率（85kHz）及电平方面达成一致。

“工作组通过三年的国际协调与调查，一致达成了轻型车辆额定通用工作频率指导方针，运用相同的工作频率对于无线供电来说是至关重要的。” 轻型车、电动车以及插电式车辆J2954无线充电（WPT）工作小组主席Jesse Schneider如是说。（Jesse Schneider同时也是宝马公司北美分部燃料电池、电动汽车、氢与标准开发经理）

由OEM、无线充电供应商、行业专家以及政府代表组成的工作组，同时还确定了电力传输能级：第一级为WPT1，最大传输能级为3.7 kW；WPT2则为7.7kW；WPT3是22 kW。

Schneider透露，工作小组计划于2014年初完成以上内容和无线汽车充电其他相关方面（例如：线圈的结构与调整）的技术信息报告（TIR），报告完成后的一两年内还会公布新版J2954标准。 更多相关信息，或有意加入相关工作组，敬请联系SAE的 Pat Ebejer at pebejer@sae.org （仅限英文邮件）。

An SAE International volunteer task force working on a standard for wireless charging of electric vehicles has agreed on the frequency (85 kHz) and the power levels that should be used.

“After three years of international collaboration and investigation within the team, consensus has been reached on a nominal common frequency of operation for the light-duty vehicle guideline,” said Jesse Schneider, Chair of the J2954 Task Force for Wireless Power Transfer (WPT) of Light Duty, Electric, and Plug-in Vehicles. “A common frequency of operation for WPT is essential.” Made up of OEMs, WPT suppliers, industry experts, and government representatives, the task force also nailed down the power transfer levels: the first one is identified as WPT1 and has a maximum transfer level of 3.7 kW; for WPT2 it is 7.7kW; and for WPT3 it is 22 kW. The task force plans to complete by early 2014 a Technical Information Report (TIR) on these and other “interoperability” aspects of wireless vehicle charging (e.g., coil geometries and alignment), according to Schneider, who serves as Fuel Cell, EV, Hydrogen and Standards Development Manager at BMW of North America. He said the TIR will be followed by publication of an updated J2954 standard within a year or two. For more information, or to join the task force, contact SAE’s Pat Ebejer at pebejer@sae.org.