Electret Power Generator With Exposed Charge-Collecting Surface
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Solution Overview
Problem
Conventional vibration-powered generators using electrets cannot generate power when external kinetic energy, such as vibration, is not input, limiting their usage environment and requiring complex electrode configurations and support structures.
Innovation Solution
A power generator incorporating an electret with a first and second charged surface of opposite polarities, where at least one electrode is partially exposed as a current collecting surface, connected to a power storage or output unit, utilizing an inorganic dielectric material with a bandgap energy of 4 eV or more to achieve high surface potential and charge collection without external energy input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vibration-powered generators using electrets are used, then power generation is achieved through electrostatic induction, but power cannot be generated when external kinetic energy such as vibration is not input
Solution Approach 1:
The electret material generates surface potential through its own residual polarization without requiring external vibration or kinetic energy input. The exposed charged surface directly collects charges from the environment, enabling the device to serve itself and generate power autonomously in various conditions.
2Reliability
If conventional electret configurations are used, then electrode structures are formed, but complex electrode configurations and support structures are required
Solution Approach 1:
The patent extracts and utilizes the charged surface of the electret itself as the charge collecting surface, eliminating the need for complex electrode configurations. By exposing the charged surface directly, the invention simplifies the structure while maintaining effective charge collection.
3Power
If inorganic dielectric material with bandgap energy of 4 eV or more is used, then high surface potential is achieved, but manufacturing complexity increases
Solution Approach 1:
The invention changes the material parameter (bandgap energy) to 4 eV or more to achieve high surface potential. This parameter change enables the electret to maintain stable residual polarization and generate sufficient power without requiring complex manufacturing processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables power generation even in environments without external kinetic energy, simplifying the configuration by allowing charge transfer and power generation through residual polarization, providing a stable and efficient energy harvesting solution.
Implementation Method 1
The electret is formed by polarizing an electret material that includes an inorganic dielectric having a bandgap energy of 4 eV or more
Implementation Method 2
practical application of an energy harvesting element using electrostatic induction of an electret has been studied
Data Source
AI summary
A power generator includes a power generating unit and at least one of a power storage unit or an output unit that is electrically connected to the power generating unit. The power generating unit includes an electret having a first charged surface and a second charged surface that are charged with opposite polarities, a first electrode formed on the first charged surface, and a second electrode formed on the second charged surface. The electret is formed by polarizing an electret material that includes an inorganic dielectric having a bandgap energy of 4 eV or more. At least one of the first electrode or the second electrode are partially disposed on the corresponding charged surface such that at least one of the first charged surface or the second charged surface has a portion as a current collecting surface exposed outward.