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Title: Piezoelectric energy harvester having planform-tapered interdigitated beams

Abstract

Embodiments of energy harvesters have a plurality of piezoelectric planform-tapered, interdigitated cantilevered beams anchored to a common frame. The plurality of beams can be arranged as two or more sets of beams with each set sharing a common sense mass affixed to their free ends. Each set thus defined being capable of motion independent of any other set of beams. Each beam can comprise a unimorph or bimorph piezoelectric configuration bonded to a conductive or non-conductive supporting layer and provided with electrical contacts to the active piezoelectric elements for collecting strain induced charge (i.e. energy). The beams are planform tapered along the entirety or a portion of their length thereby increasing the effective stress level and power output of each piezoelectric element, and are interdigitated by sets to increase the power output per unit volume of a harvester thus produced.

Inventors:
 [1];  [2]
  1. Tijeras, NM
  2. Albuquerque, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1017264
Patent Number(s):
7948153
Application Number:
12/325,311
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Kellogg, Rick A, and Sumali, Hartono. Piezoelectric energy harvester having planform-tapered interdigitated beams. United States: N. p., 2011. Web.
Kellogg, Rick A, & Sumali, Hartono. Piezoelectric energy harvester having planform-tapered interdigitated beams. United States.
Kellogg, Rick A, and Sumali, Hartono. Tue . "Piezoelectric energy harvester having planform-tapered interdigitated beams". United States. https://www.osti.gov/servlets/purl/1017264.
@article{osti_1017264,
title = {Piezoelectric energy harvester having planform-tapered interdigitated beams},
author = {Kellogg, Rick A and Sumali, Hartono},
abstractNote = {Embodiments of energy harvesters have a plurality of piezoelectric planform-tapered, interdigitated cantilevered beams anchored to a common frame. The plurality of beams can be arranged as two or more sets of beams with each set sharing a common sense mass affixed to their free ends. Each set thus defined being capable of motion independent of any other set of beams. Each beam can comprise a unimorph or bimorph piezoelectric configuration bonded to a conductive or non-conductive supporting layer and provided with electrical contacts to the active piezoelectric elements for collecting strain induced charge (i.e. energy). The beams are planform tapered along the entirety or a portion of their length thereby increasing the effective stress level and power output of each piezoelectric element, and are interdigitated by sets to increase the power output per unit volume of a harvester thus produced.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {5}
}

Works referenced in this record:

A review of power harvesting using piezoelectric materials (2003–2006)
journal, May 2007


Power management for energy harvesting wireless sensors
conference, May 2005