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Toyota develops wireless charging system

toyota prius plug-in hybridToyota has developed a wireless charging system that it expects will replace the need to plug-in its plug-in Prius hybrid.

The new technology, currently undergoing testing in Japan, allows a vehicle to be charged simply by parking it in above a coil set into the ground. Wireless charging makes the recharging process simpler and easier, dispensing with cables and connectors.

The Toyota charging system transmits electricity using magnetic resonance created by changes in magnetic field intensity between the transmitting coil in the ground and a receiving coil in the car. It is designed so that it can reduce any loss in power transmission efficiency caused by misalignment or height differences between the coils.

The system is being developed with a future market launch in mind. Measures have been taken to minimise any electromagnetic interference with nearby equipment, and the transmitting coil in the ground has been made robust enough to withstand vehicles driving over it.

To help the driver align the car correctly, Toyota has developed a function for its Intelligent Parking Assist system that shows the position of the transmitting coil in a parking space.

Toyota will use the test results to develop the technology further, with the ultimate aim of bringing the system to market.

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