US 11,728,688 B2
Free positioning charging pad
Eric Goodchild, San Tan Valley, AZ (US); and Jake Slatnick, San Diego, CA (US)
Assigned to Aira, Inc., Phoenix, AZ (US)
Filed by AIRA, INC., Chandler, AZ (US)
Filed on Oct. 18, 2019, as Appl. No. 16/658,008.
Application 16/658,008 is a continuation of application No. 16/283,734, filed on Feb. 22, 2019, granted, now 11,171,502.
Claims priority of provisional application 62/794,541, filed on Jan. 18, 2019.
Claims priority of provisional application 62/784,667, filed on Dec. 24, 2018.
Claims priority of provisional application 62/634,799, filed on Feb. 23, 2018.
Prior Publication US 2020/0136436 A1, Apr. 30, 2020
Int. Cl. H02J 50/12 (2016.01); H02J 7/00 (2006.01); H05K 1/14 (2006.01); H05K 1/18 (2006.01); H02J 50/40 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01)
CPC H02J 50/402 (2020.01) [H02J 7/0045 (2013.01); H02J 50/12 (2016.02); H02J 50/80 (2016.02); H02J 50/90 (2016.02); H05K 1/144 (2013.01); H05K 1/181 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A charging device, comprising:
a first printed circuit board;
a second printed circuit board, wherein each of the first printed circuit board and second printed circuit board has a top metal layer and a bottom metal layer;
a first plurality of charging cells, each charging cell in the first plurality of charging cells comprising only coils formed entirely in the top metal layer of the first printed circuit board; and
a second plurality of charging cells, each charging cell in the second plurality of charging cells comprising only coils formed entirely in the top metal layer of the second printed circuit board,
wherein the first printed circuit board and the second printed circuit board are mechanically or adhesively bonded to one another, and
wherein each charging cell in the first plurality of charging cells and the second plurality of charging cells is energized independently of the other charging cells provided in the charging device.