EV "Dynamic Wireless Charging" Technology Road Testing

The University of Tokyo and others begin Japan’s first road testing in Kashiwa City

2023/10/26

Summary
Overview of the kick-off ceremony for field testing on general public roads
Overview of dynamic wireless charging
Dynamic wireless charging technology
Safety verification
Plans for the future

Summary

A joint research group consisting of the Fujimoto-Shimizu Laboratory of the University of Tokyo's Graduate School of Frontier Sciences, Bridgestone Corporation, NSK Ltd., Rohm Co., Ltd. (ROHM), Toyo Denki Seizo K.K., Ono Sokki Co., Ltd., Denso Corporation, Mitsui Fudosan Co., Ltd., SWCC Corporation, Car Mate Mfg. Co., Ltd., and the Chiba University Miyagi Laboratory, started conducting Japan's first "Road Testing of Wireless EV Charging While Driving Technology" (i.e., Dynamic Wireless Charging) on a public road near Kashiwanoha Campus Station on the Tsukuba Express line from October 2023 to March 2025.

The demonstration testing for EV charging technology while driving is being carried out within the framework of the Kashiwa ITS Promotion Council in collaboration with Kashiwa City, the University of Tokyo, and other related organizations. The test vehicles are a Toyota Hiace converted to an EV and a Toyota RAV4 PHV plug-in hybrid vehicle, both of which have been equipped with a dynamic wireless charging system, which allows a standard EV to travel 1km after 10 seconds of charging.

Technologies developed for dynamic wireless charging are being adopted, such as inverters with SiC power devices in the transmitter/receiver coils, Litz wire coils, approach detection using 4G communication and power transmission coils, and precast coils with High Performance Fiber Reinforced Cement Composite (HPFRCC) cement to ensure magnetic properties and durability.

This report provides an overview of the technology of the mobility experiments based on coverage of the project kick-off ceremony and press conference held on October 3, 2023, for the field testing of dynamic wireless charging.


RAV4 PHV demo vehicle	Power receiving antenna on the Toyota RAV4 PHV

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