Toyota has disclosed that this month, it will start the verification testing of a new wireless battery charging system developed for vehicles fitted an electric powertrain. This new technology enables such vehicles to be charged just by parking it in alignment with a coil set into the surface of the ground. The new technology makes the charging process much easier since it does away with cables and connectors.
Toyota’s new charging system transmits electricity using magnetic resonance created by changes in magnetic field intensity between a transmitting coil in the ground and a receiving coil in the vehicle. The system is designed in a way that any loss in power transmission efficiency caused by misalignment or height differences between the coils is trimmed.
Toyota is developing the system with an eye for a future market launch. The carmaker has taken measures to minimize any electromagnetic interference with nearby equipment. It also made the transmitting coil in the ground robust enough to withstand vehicles driving over it.
To help with alignment, Toyota has developed a function for its Intelligent Parking Assist system that shows the position of the transmitting coil in a parking space.
The verification testing entails three plug-in hybrid used by homes in Aichi, Japan and will assess user satisfaction, the system’s ease of use, misalignment rates and charging behavior. Toyota plans to use the results of the tests to further develop the technology, with the ultimate target of bringing it to market. [source: Toyota]