US 11,955,814 B2
Measuring energy-charging rate of an energy harvester
Alon Yehezkely, Haifa (IL); Tom Cohen, Haifa (IL); and David Lipshitz, Raanana (IL)
Assigned to WILIOT, LTD., Caesarea (IL)
Filed by Wiliot, Ltd., Caesarea (IL)
Filed on Jul. 28, 2021, as Appl. No. 17/387,547.
Prior Publication US 2023/0031981 A1, Feb. 2, 2023
Int. Cl. H02J 7/00 (2006.01); H02J 50/00 (2016.01); H02J 50/20 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01)
CPC H02J 50/20 (2016.02) [H02J 50/001 (2020.01); H02J 50/80 (2016.02); H02J 50/90 (2016.02)] 10 Claims
OG exemplary drawing
 
1. A wireless Internet of things (IoT) tag, comprising:
at least one antenna configured to harvest an ambient energy;
an energy harvester coupled to the at least one antenna;
an energy storage coupled to the energy harvester and configured to store harvested energy;
a power management unit (PMU), wherein the PMU is configured to at least provide an indication on an energy level at the energy storage; and
a system of chip (SoC), wherein the SoC is powered by the harvested energy as stored in the energy storage; and
an energy detector configured to the energy storage, wherein the energy detector is configured to measure an energy-charging rate of the energy harvester, wherein the energy detector comprises a time counter configured to measure a time elapsed from a discharge level to a reference level, wherein the reference level is a predetermined voltage level and measured by the PMU.