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RFID TAG BATTERY CHARGING METHOD

  • US 20170201003A1
  • Filed: 01/08/2016
  • Published: 07/13/2017
  • Est. Priority Date: 01/08/2016
  • Status: Active Grant
First Claim
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1. A trickle-charged Radio Frequency Identification (RFID) device comprising:

  • a first main antenna element configured to receive a plurality of wireless interrogator signals from one or more RFID readers, a first portion of the plurality of wireless interrogator signals lacking a tag inquiry for the RFID device;

    a first power harvester electrically connected with the first main antenna element and configured to obtain power from each of the plurality of wireless interrogator signals;

    an intermediate storage device electrically connected to the first power harvester via a first circuit and configured to collect a plurality of trickle flows of obtained power from the first power harvester for the first portion of the plurality of wireless interrogator signals, the first circuit being configured to divert the plurality of trickle flows to the intermediate storage;

    a primary storage device connected with the intermediate storage device via a second circuit, the second circuit configured to drain a collected store of the plurality of trickle flows from the intermediate storage when the collected store reaches a predetermined discharge level; and

    a control unit configured to direct the plurality of trick flows obtained from the first portion of the plurality of wireless interrogator signals to the intermediate storage.

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