US 12,120,959 B2
Stacked piezoelectric energy harvester
Elizabeth Annamaria Friis, Lawrence, KS (US); Ember Krech, Lawrence, KS (US); Eileen Cadel, Lawrence, KS (US); Bonnie Reinsch, Lawrence, KS (US); and Leighton Lapierre, Thornton, CO (US)
Assigned to UNIVERSITY OF KANSAS, Lawrence, KS (US); and EVOKE MEDICAL, LLC, Lawrence, KS (US)
Appl. No. 17/045,262
Filed by UNIVERSITY OF KANSAS, Lawrence, KS (US); and EVOKE MEDICAL, LLC, Lawrence, KS (US)
PCT Filed Apr. 2, 2019, PCT No. PCT/US2019/025352
§ 371(c)(1), (2) Date Oct. 5, 2020,
PCT Pub. No. WO2019/195264, PCT Pub. Date Oct. 10, 2019.
Claims priority of provisional application 62/653,830, filed on Apr. 6, 2018.
Prior Publication US 2021/0367134 A1, Nov. 25, 2021
Int. Cl. H10N 30/50 (2023.01); H10N 30/30 (2023.01); H10N 30/853 (2023.01); H10N 30/857 (2023.01); A61N 1/05 (2006.01)
CPC H10N 30/50 (2023.02) [H10N 30/30 (2023.02); H10N 30/8536 (2023.02); H10N 30/8554 (2023.02); H10N 30/857 (2023.02); A61N 1/0551 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stacked piezoelectric energy harvester, comprising:
a. a first piezoelectric element layer;
b. a first compliant layer positioned adjacent the first piezoelectric element layer; and
c. a second piezoelectric element layer positioned adjacent the first compliant layer,
wherein a ratio of a volume of the first piezoelectric element layer and/or a volume of the second piezoelectric element layer, to a volume of the first compliant layer is between about 1:8 volume piezoelectric:volume compliant to about 8:1 volume piezoelectric:volume compliant, or
wherein a ratio of a thickness of the first piezoelectric element layer and/or a thickness of the second piezoelectric element layer, to a thickness of the first compliant layer is between about 1:8 thickness piezoelectric:thickness compliant to about 8:1 thickness piezoelectric:thickness compliant; and
wherein the first piezoelectric element layer is poled in a radial direction and the second piezoelectric element layer is poled in a through-thickness direction; and, wherein the stacked energy harvester is configured to withstand a minimum load of at least 500 N.