US 12,334,750 B2
Far-field wireless charging of medical devices
Zhengchi Yan, Duarte, CA (US); Siddharth Chandra, Issaquah, WA (US); Emily A. Reveles, Northridge, CA (US); Sophia L. Wolf, Redondo Beach, CA (US); and Arpit G. Christian, Chatsworth, CA (US)
Assigned to Medtronic MiniMed, Inc., Northridge, CA (US)
Filed by Medtronic MiniMed, Inc., Northridge, CA (US)
Filed on Dec. 13, 2021, as Appl. No. 17/644,014.
Claims priority of provisional application 63/133,603, filed on Jan. 4, 2021.
Prior Publication US 2022/0216735 A1, Jul. 7, 2022
Int. Cl. H02J 7/00 (2006.01); A61B 5/00 (2006.01); A61B 5/0531 (2021.01); A61B 5/145 (2006.01); H02J 50/20 (2016.01); A61M 5/142 (2006.01)
CPC H02J 50/20 (2016.02) [A61B 5/0531 (2013.01); A61B 5/14532 (2013.01); A61B 5/6843 (2013.01); A61B 2560/0219 (2013.01); A61M 5/142 (2013.01); A61M 2205/13 (2013.01); A61M 2205/3306 (2013.01); A61M 2205/3327 (2013.01); A61M 2205/8206 (2013.01); A61M 2205/8243 (2013.01); A61M 2230/65 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A medical device comprising:
a rechargeable battery;
a receiving antenna configured to wirelessly receive electrical power from a transmission antenna;
charging circuitry configured to recharge the rechargeable battery using the electrical power received by the receiving antenna; and
one or more processors configured to:
determine a relative proximity of the medical device to a body of a patient;
determine a power-transfer efficiency based on the relative proximity of the medical device to the body of the patient;
determine, based at least in part on the relative proximity and the power-transfer efficiency, a tuning for the receiving antenna that is safe for the patient; and
cause the receiving antenna to be tuned according to the determined tuning.