US 12,395,018 B2
Control system for wireless power charging and alignment
Arvind Govindaraj, Mountain View, CA (US); and Peng Cong, Burlingame, CA (US)
Assigned to Verily Life Sciences LLC, Dallas, TX (US)
Appl. No. 17/423,990
Filed by Verily Life Sciences LLC, South San Francisco, CA (US)
PCT Filed Jan. 21, 2020, PCT No. PCT/US2020/014362
§ 371(c)(1), (2) Date Jul. 19, 2021,
PCT Pub. No. WO2020/159748, PCT Pub. Date Aug. 6, 2020.
Claims priority of provisional application 62/798,055, filed on Jan. 29, 2019.
Prior Publication US 2022/0103023 A1, Mar. 31, 2022
Int. Cl. H02J 50/90 (2016.01); A61N 1/378 (2006.01); H02J 7/00 (2006.01); H02J 50/10 (2016.01); H02J 50/20 (2016.01); H02J 50/80 (2016.01)
CPC H02J 50/90 (2016.02) [A61N 1/3787 (2013.01); H02J 7/00714 (2020.01); H02J 7/007182 (2020.01); H02J 50/10 (2016.02); H02J 50/20 (2016.02); H02J 50/80 (2016.02)] 35 Claims
OG exemplary drawing
 
1. A system for wireless charging, the system comprising:
an implantable device comprising:
a rectifier circuit;
an electromagnetic (“EM”) field receiving coil to receive a charging EM field, the EM field receiving coil electrically connected to the rectifier circuit;
a first antenna; and
a processor that iteratively performs a set of operations at a rate that is based at least in part on power fluctuations at a load, the set of operations comprising:
receiving one or more electrical signals from the rectifier circuit and a battery of the implantable device;
determining a present EM field value based on the one or more electrical signals, wherein the present EM field value includes a scalar representing a magnitude of a present EM field at the EM field receiving coil;
determining a target EM field value based on the one or more electrical signals; and
transmitting, using the first antenna, the present EM field value and the target EM field value; and
a wireless charger comprising:
a power source electrically connected to a transmitting coil to produce the charging EM field;
a second antenna that receives the present EM field value and the target EM field value from the first antenna; and
a controller that alters at least one of a voltage or a current of the power source based on the present EM field value and the target EM field value to produce the charging EM field.