Miniature piezoelectric and capacitance composite vibration energy harvester

An energy harvester and composite vibration technology, which is applied in the directions of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc. and other problems, to achieve the effect of improving energy conversion efficiency, broadening the applicable frequency range and novel structure

Inactive Publication Date: 2015-04-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electromagnetic type is generally large in size, which increases the difficulty of the miniaturization design of the energy harvester

Method used

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  • Miniature piezoelectric and capacitance composite vibration energy harvester
  • Miniature piezoelectric and capacitance composite vibration energy harvester
  • Miniature piezoelectric and capacitance composite vibration energy harvester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 2 , 3 , 4, the piezoelectric energy collection unit 1 is connected to the upper part of the support body 2, and the bottom part of the support body 2 is bonded on the base body 5, and there is a capacitive energy collection unit 3 inside the support body, and in the capacitive energy collection unit 3 There is an electrolyte 4, and the structure of the piezoelectric energy harvesting unit 1 is: an upper electrode 104 is deposited on the upper part of the spider web piezoelectric film 101, and a lower electrode 105 is deposited on the lower part, and the lower electrode 105 is fixedly connected to the support material 102, and the upper electrode 104 is connected to the The first wire 106 is connected, and the lower electrode 105 is connected to the second wire 107; the lower part of the support material 102 in the piezoelectric energy collection unit 1 is fixedly connected to the quality block 103; the capacitive energy collection unit 3 includes an uppe...

Embodiment 2

[0039] Such as Figure 5 , 6 , 7, the surface of the upper pole plate 304 and the lower pole plate 303 has a spherical microstructure 301, and the rest are the same as in embodiment 1.

Embodiment 3

[0041] Such as Figure 8 , 9 , 10, the surface of the upper pole plate 304 and the lower pole plate 303 has a pyramidal microstructure 302, and the rest are the same as in embodiment 1.

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Abstract

The invention relates to a miniature piezoelectric and capacitance composite vibration energy harvester, belonging to the technical field of MEMS (micro electro mechanical system) and micro energy. A piezoelectric energy harvesting unit is connected with the upper part of a support body, the lower part of the support body is bonded on a base body, and the interior of the support body is provided with a capacitance energy harvesting unit in which electrolyte is provided. The harvester has the advantages that a same mechanism is adopted to realize the energy harvesting of two different mechanisms, so as to achieve the effect of superimposing and magnifying the output energy, the energy conversion efficiency of a device is improved further by the structures of piezoelectric and capacitance energy harvesting units, broadband vibration energy harvesting can be realized efficiently, and the harvester is especially suitable for the vibration energy harvesting in a low-frequency small-amplitude environment.

Description

technical field [0001] The invention relates to the technical fields of micro-electromechanical systems and micro-energy sources, in particular to a miniature piezoelectric and capacitive composite vibration energy collector. Background technique [0002] With the development of wireless sensor network technology, the energy supply of sensors has become an important factor restricting the development of sensors. At present, the power consumption of microelectronic devices has been reduced to the order of tens to hundreds of microwatts. Under such energy consumption requirements, energy harvesters are used to automatically convert the energy of the surrounding environment into electrical energy in a certain way, thereby providing Powering various low-power microelectronic devices becomes possible. Compared with traditional energy sources (such as transmission lines, batteries, etc.), energy harvesters are not limited by connecting lines and do not need to be replaced frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18H02N1/08
Inventor 杨旭付宇鹏王东方赵继
Owner JILIN UNIV
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