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Electret thin film based energy collector

An energy harvester, electret technology, used in induction generators and other directions

Inactive Publication Date: 2016-06-01
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the current micro-manufacturing technology, the electrostatic energy harvester can only be made into a simple single-layer variable capacitance component, which greatly limits its collection of vibration energy and output of electrical energy.

Method used

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  • Electret thin film based energy collector
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] combine figure 1 , The structure of the energy harvester based on the electret film includes an electric energy generating device and a rectifying device. Among them, the electric energy generating device includes an upper electrode, a lower electrode and an electret film, and the electret film adopts a size of 3×3cm 2 , a bipolar electret composite film with a thickness of 2 mm and a maximum amplitude of 1.2 mm, positive and negative charges are distributed on the upper and lower surfaces of the film; the electret film is arranged between the upper electrode and the lower electrode, and does not In contact with any one of the upper and lower electrodes. Connect the diodes D1, D2, D3 and D4 electrically to form a series circuit to form the rectification device of the energy harvester, then electrically connect the connection points of the diodes D1 and D4 to the upper electrode, and connect the connection points of the diodes D2 and D3 to the The lower electrode is el...

Embodiment 2

[0024] refer to figure 2 , the structure of the electric energy generating device and the rectifying device of this embodiment, and the connection mode of the two are basically the same as that of Embodiment 1, the difference is that: this embodiment also installs an energy storage capacitor in the energy harvester and is used for controlling For the output voltage diode D5, one end of the energy storage capacitor is connected to the connection point of the diodes D1 and D2, and the other end of the energy storage capacitor is grounded; the anode of the diode D5 is connected to the connection point of the diodes D2 and D3, and the cathode is connected to the output terminal.

[0025] The working principle of this embodiment:

[0026] The electret film undergoes thermal polarization and corona polarization, and its internal dipole and space charge are polarized and characterized by the equivalent surface charge, and then the surface of the film has a high voltage after corona ...

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Abstract

The invention relates to an electret thin film based energy collector, and belongs to the field of a novel environment-friendly energy-collection technology. The energy collector comprises an electric energy generation apparatus and a rectifying apparatus for supplying constant output current; the electric energy generation apparatus comprises an upper electrode, a lower electrode and a bipolar electret thin film; the electret thin film is arranged between the upper electrode and the lower electrode; the rectifying apparatus is electrically connected with the upper electrode and the lower electrode separately; the electret thin film adopts the bipolar electret thin film; and positive charges and negative charges are distributed on the upper surface and the lower surface of the thin film respectively. The electret thin film based energy collector provided by the invention has the characteristics of simple structure, high material stability, and easy storage of weak electric energy.

Description

technical field [0001] The invention belongs to the technical field of new environment-friendly energy collection, and in particular relates to a vibration energy collector for converting mechanical vibration energy into electric energy. Background technique [0002] Energy harvesting refers to harvesting energy from the environment, such as heat, radiation or kinetic energy, and converting it into electrical energy. With advances in MEMS technology and ultra-low-power integrated circuit design, the size of circuits and devices, as well as the energy required to drive them, are decreasing dramatically. These required energy levels are already within the range of energy harvesters can provide. Energy harvesters are therefore emerging as an alternative to batteries for powering these circuits and devices such as wireless sensors and body implants. [0003] Converting from vibrational energy to electrical energy is one type of energy harvesting. Among them, there are three m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N1/08
CPCH02N1/08
Inventor 陈钢进李岳峰
Owner HANGZHOU DIANZI UNIV
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