Device and method for detecting an object within a wireless charging region
AssigneesHyundai America Technical Center, Inc., Hyundai Motor Company, Kia Motors Corporation
InventorsAllan Lewis, Bilal Javaid
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Abstract
An assembly and method are provided for detecting an object within a wireless charging region of an electric vehicle. The method includes applying by a controller, a voltage to the wireless charging region to generate a capacitance value and measuring by the controller, the capacitance value of an electromagnetic shield disposed on the underside of the vehicle. Further, the controller monitors the capacitance value of the electromagnetic shield; and the controller detects a change in the capacitance value when the object enters the wireless charging region.
Claims20
A method of detecting an object within a wireless charging region of an electric vehicle, comprising:
- applying, by a controller, a voltage to the wireless charging region to generate a capacitance value;
- measuring, by the controller, the capacitance value of an electromagnetic shield disposed on the underside of the vehicle;
- monitoring, by the controller, the capacitance value of the electromagnetic shield;
- and
- detecting, by the controller, a change in the capacitance value when the object enters the wireless charging region.
An electromagnetic shield assembly for an electric vehicle, comprising:
- a base layer coupled to an underside of the vehicle;
- a conductive layer having a ground connection to the vehicle and disposed on the base layer;
- a capacitive sensing electrode electrically connected to a capacitance sensing circuit coupled to an interlayer disposed on the conductive layer;
- and
- a magnetic field coupling layer connected to the interlayer,
- wherein a plurality of bonding layers are disposed between each layer.
Dependencies are inferred from the claim text.