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Energy harvesting system for IoT devices

  • US 10,153,650 B2
  • Filed: 12/15/2015
  • Issued: 12/11/2018
  • Est. Priority Date: 12/15/2015
  • Status: Active Grant
First Claim
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1. A system for powering a device module, the system comprising:

  • an energy harvesting module;

    a supercapacitor chargeable by the energy harvesting module and configured to discharge power to the device module at a supercapacitor voltage;

    a secondary battery configured to discharge power to the device module at a battery voltage;

    a switching circuit configured to selectively discharge power from the supercapacitor during high energy demand tasks and discharge power from the secondary battery during periods between high energy demand tasks; and

    a controller selectively distributing power discharged by at least one of the supercapacitor and the secondary battery to the device module, wherein the controller is configured to;

    evaluate energy usage statistics for the supercapacitor and the secondary battery, the energy usage statistics include at least one of amount of power discharged, duration of power discharge, frequency of power discharge and total power discharged during the at least one energy demanding task; and

    generate an alert if the collected energy usage statistics indicate that usage of the secondary battery exceeds usage of the supercapacitor.

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