3D Cone Triboelectric Harvester for Higher Output Duration
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Solution Overview
Problem
Conventional electrostatic energy-harvesting devices with 2-dimensional thin films exhibit lower peak-peak output due to electrification differences when objects come into contact or are rubbed, necessitating methods to enhance output efficiency.
Innovation Solution
The use of a 3-dimensional cone-shaped electrostatic energy-harvesting device with a first and second substrate, each having a cone shape with an opened lower surface and hollow inside, where a first and second rubbing electrified body with opposite electrification characteristics are disposed on the outer and inner surfaces respectively, generating triboelectricity and electrostatic induction upon contact and separation, with leader lines connected to a storage battery and rectification diode for energy harvesting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional 2-dimensional thin film structure is used for electrostatic energy-harvesting, then the device structure is simple, but the peak-peak output is low due to limited electrification difference
Solution Approach 1:
The patent transitions from a conventional 2-dimensional thin film structure to a 3-dimensional cone-shaped structure. This dimensional change allows the rubbing electrified bodies to be positioned on the conical surfaces, creating a larger effective contact area and enhancing the electrification difference during contact and separation, thereby significantly increasing the peak-peak output of the energy-harvesting device
2Productivity
If a 3-dimensional cone shape is used to enhance output, then the electrostatic effect is amplified, but the device structure becomes more complex
Solution Approach 1:
The patent employs conical surfaces with curved geometry instead of flat planar surfaces. The curved conical surfaces allow for better contact during rubbing and create a more effective electrostatic field distribution during separation. The curvature of the conical surfaces enhances the electrification effect while maintaining a relatively compact and integrated device structure
3Duration of action of moving object
If conventional 2-dimensional structures are used, then the device is easy to manufacture, but the output duration is short (approximately 10 ms)
Solution Approach 1:
By transitioning to a 3-dimensional conical structure, the patent extends the duration of electrostatic interaction. The conical geometry allows for a more gradual contact and separation process compared to flat surfaces, maintaining the electrostatic effect for a longer period (extending from 10 ms to 80 ms). This dimensional change enables better control over the contact mechanics and electrostatic field evolution over time
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
This configuration maintains and amplifies the electrostatic effect generated by rubbing, extending the output duration from approximately 10 ms to 80 ms, significantly increasing the energy-harvesting device's output efficiency.
Implementation Method 1
a first rubbing electrified body disposed on an outer surface of the first substrate; a second rubbing electrified body which includes a material having opposite electrification characteristics to the first rubbing electrified body... triboelectricity is generated by contact therebetween
Implementation Method 2
electrostatic induction is generated by separation thereof
Data Source
AI summary
An electrostatic energy-harvesting device is provided. The electrostatic energy-harvesting device with a 3-dimensional cone shape includes a first structure including a first substrate having a cone shape with an opened lower surface and a hollow inside, and a first rubbing electrified body disposed on an outer surface of the first substrate; a second structure including a second substrate having the same shape as the first substrate and a second rubbing electrified body which includes a material having opposite electrification characteristics to the first rubbing electrified body and disposed on an inner surface of the second substrate; and leader lines connected to each of the first rubbing electrified body and the second rubbing electrified body.