Investigations on energy harvesting systems incorporating mechanical and electrical nonlinearities to charge reusable batteries

This report analyzes the electromechanical coupling evident in vibration energy harvesting systems that charge reusable batteries. A model of a vibration energy harvesting system with far-from-equilibrium nonlinearities is considered for sake of capitalizing on high-energy forced vibrations. The piezoelectric structure is coupled with nonlinear interface circuits that leverage rectification and control stages to enhance power delivery to the battery. Three circuits, namely standard energy harvesting (SEH) circuit, parallel synchronized switching harvesting on inductor (P-SSHI) circuit, and synchronized charge extraction (SCE) are considered as interfaces between the nonlinear energy harvester and a battery. A simplified power calculation is numerically verified to accurately estimate the harvested power respectively delivered from three interface circuits to the battery. The investigations reveal that increasing required battery voltage may inhibit means to achieve high-energy vibrations and thus prevent battery charging. By a conservation of energy, it is shown that the phase lag between beam velocity and the base acceleration is the primary indicator of interference between dynamic energy flows in the electromechanical sub-systems. This research sheds light on the influences of energy storage components on the functioning of nonlinear vibration energy harvesting systems. Moreover, the principles uncovered for the inhibition of high-energy oscillation may guide future nonlinear energy harvesting system design to extract the best power out from the ambient vibration environments.

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Work Title Investigations on energy harvesting systems incorporating mechanical and electrical nonlinearities to charge reusable batteries
Access
Open Access
Creators
  1. Wen Cai
  2. Ryan L. Harne
Keyword
  1. Mechanical and electrical nonlinearity
  2. Rechargeable battery
  3. Vibration energy harvesting
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Energy Conversion and Management
Publication Date January 12, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.enconman.2021.115045
Deposited July 19, 2022

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Version 1
published

  • Created
  • Added Cai_investigations_energy_harvesting_systems_mechanical_electrical_nonlinearities_reusable_batteries.pdf
  • Added Creator Wen Cai
  • Added Creator Ryan L. Harne
  • Published
  • Updated Keyword, Publication Date Show Changes
    Keyword
    • Mechanical and electrical nonlinearity, Rechargeable battery, Vibration energy harvesting
    Publication Date
    • 2022-01-15
    • 2022-01-12
  • Updated