Design And Development Of A Triboelectric Energy Harvesting Device Based On Charge Excitation

With the development of the Internet of Things and artificial intelligence,laying a network of sensor nodes is the most basic requirement in the information age.However,supplying power to sensor nodes has become the primary problem people face.Traditional power supply methods generally use batteries or transmission lines.However,the battery life is limited and needs to be replaced in time.Improper disposal of waste batteries can easily cause environmental pollution.Long-distance transmission lines will waste materials,and the source of its power is the combustion of fossil energy.This method does not conform to the concept of green and low-carbon development,so finding a new power supply method has become an urgent problem to be solved.Triboelectric nanogenerators are devices that use mechanical friction between materials to generate electrical energy.Due to its simple structure,strong applicability,low cost,and advantages of integration,it has attracted widespread attention from researchers and has been widely recognized as a potential solution for distributed sensor power supply.However,due to the surface charge density of the friction layer is still low after friction,its output performance is severely limited,which in turn affects its practical application.Based on the internal equivalent power supply model of the triboelectric nanogenerator,this topic proposes a Triboelectric energy harvesting device based on charge excitation,aiming to improve the energy harvesting efficiency of the triboelectric nanogenerator in collecting mechanical energy.First,this paper introduces Maxwells equations and the basic theory of Triboelectric nanogenerators,and reveals the inner power generation mechanism of Triboelectric nanogenerators.Then,based on the internal equivalent circuit of Triboelectric nanogenerators and its equivalent circuit model,the vertical the triboelectric generation in the contact-separation mode is taken as the research object for analysis.And deduced the relevant theories about the mechanism of charge transfer,accumulation,air breakdown and so on in the Triboelectric energy harvesting device based on charge excitation.And use the multi-physics field finite element simulation to verify the theory,further determine the circuit and structural parameters of the friction energy harvesting device based on charge excitation,and build an experimental test system for experiments on voltage characteristics,current characteristics,charge characteristics,power characteristics,etc.Test,and finally use the virtual instrument software to read the data on the computer.During the experimental testing stage,the experimental research on the matching relationship between the circuit parameters and the output performance of the friction energy harvesting device was carried out,and the output characteristics of the waveform when the various parameters in the circuit changed were systematically studied.Finally,in the application experiment,the commercial temperature was successfully lit the hygrometer and stable power supply realize the stable and efficient output of the friction energy harvesting device.Through experimental tests,the Triboelectric energy harvesting device based on charge excitation has obtained an open circuit voltage of 1200 V,a short circuit current of 75 μA,an instantaneous output power of 27 m W,and a transfer charge of0.8 μC under the frequency of 1.5 Hz.In the simulated wind environment of 6 m/s,about 320 light-emitting diodes are driven,and the 220 μF capacitor is charged to 3.0V in 39 seconds,and the commercial temperature and humidity meter is driven to work stably,and the voltage is finally kept stable at 1.26 V.The triboelectric energy harvesting device based on charge excitation designed and developed in this paper can increase the output power of the Triboelectric nanogenerator through charge excitation,which provides an important contribution to the improvement of the output power of the Triboelectric nanogenerator and the stable capture of wind energy in the environment.