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US 9,882,512 B2Granted
Piezoelectric element for power generation and power generation device using same
OwnerSang-Cheol Baeinventor
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Abstract
A piezoelectric element for power generation and a power generation device using the same according to the present invention can maximize an electromotive force generated by the piezoelectric element by converting an external force (a natural force or a load force of a person/vehicle or the like) transferred from the outside into an instantaneous impact force and transferring the impact force to the piezoelectric element.
Claims11
A piezoelectric element for power generation, the element comprising:
- a metal thin film;
- a piezoelectric material layer fixed to at least any one of a top surface and a bottom surface of the metal thin film;
- and
- an electrode layer formed at one side of an outer surface of the piezoelectric material layer,
- wherein the metal thin film is configured of a flat surface unit to which the piezoelectric material layer is fixed, and an elastic deformation unit configured in a shape extended and bent from a rim of the flat surface unit toward outside to be elastically deformed in a vertical direction of the flat surface unit and generate an impact force when an external force is applied,
- wherein the element further comprises a reinforcement unit formed at an outer end portion of the elastic deformation unit in order to prevent the flat surface unit from being deformed in accordance with the deformation when the elastic deformation unit is deformed,
- wherein the reinforcement unit is configured by forming the outer end portion of the elastic deformation unit to be thicker than the other portions.
4 more elements
A power generation device using a piezoelectric element, the device comprising:
- an external force transfer unit for generating a displacement when an external force is applied;
- a stopper unit installed at one side of the external force transfer unit to generate an impact force by collision with the external force transfer unit where the displacement is generated;
- a piezoelectric power generation unit installed at least at any one of the external force transfer unit and the stopper unit to generate electricity using a piezoelectric effect obtained by the impact force;
- and
- a charging unit for charging the electricity generated by the piezoelectric power generation unit,
- wherein the external force transfer unit includes a rotation axis and a rotation member of a bar shape having a middle one end portion combined with the rotation axis so that both end portions may rotate centering on the rotation axis, and the stopper unit is installed to collide with the other end portion of the rotation member when one end portion of the rotation member rotates by an external force.
3 more elements
Dependencies are inferred from the claim text.