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Interconnections for multi-layer transmitter coil arrangements in wireless charging mats

  • US 10,693,308 B2
  • Filed: 09/08/2017
  • Issued: 06/23/2020
  • Est. Priority Date: 09/23/2016
  • Status: Active Grant
First Claim
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1. A wireless charging device comprising:

  • a housing having a charging surface, the housing including first and second walls defining an interior cavity;

    a transmitter coil arrangement disposed within the interior cavity, the transmitter coil arrangement including a plurality of transmitter coils arranged in at least a top layer, a bottom layer, and a middle layer between the top and bottom layers, and positioned within the interior cavity in an overlapping arrangement such that different coils in the plurality of transmitter coils are on different planes and each of the plurality of transmitter coils has a central axis positioned a lateral distance away from the central axes of all other transmitter coils of the plurality of transmitter coils;

    a plurality of cowlings for confining the plurality of transmitter coils in their respective positions;

    an interconnection structure positioned within the interior cavity between the transmitter coil arrangement and the second wall, the interconnection structure comprising a plurality of packaged electrical components mounted onto the interconnection structure; and

    a plurality of standoffs coupled to the interconnection structure and configured to electrically couple the transmitter coil arrangement to the plurality of packaged electrical components, wherein the plurality of standoffs includes;

    a first standoff extending through the middle layer and the bottom layer and coupling the interconnection structure to a transmitter coil in the top layer;

    a second standoff extending through the bottom layer and coupling the interconnection structure to a transmitter coil in the middle layer; and

    a third standoff coupling the interconnection structure to a transmitter coil in the bottom layer.

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