Piezoelectric energy trapping device capable of efficient trapping energy and energy-storaging

Abstract

A piezoelectric energy captor enabling to capture energy and store energy effectively consists of piezoelectric beam formed by two layers of piezoelectric ceramic plates and intermediate sandwich layer, electrode prepared by plating metal silver on ceramic plate, inductance coil with control switch, bridge type of rectifier, rectifying capacitor, Cuk type of dc-dc converter formed by transistor switch and electric inductance as well as diode, filtering capacitor for stabilizing charge current, and energy storing battery.

Description

[technical field] [0001] The invention belongs to a piezoelectric energy harvester capable of capturing energy from environmental vibrations and effectively storing the captured energy in a rechargeable battery. [Background technique] [0002] Microelectronic devices need energy to work, and the traditional method is to provide energy by carrying batteries. Due to the short service life of the battery, high quality-to-energy ratio, and sometimes difficult replacement due to environmental constraints, it is not suitable for application in modern networked sensing technology. Finding new and more effective energy supply methods is the key technology for modern sensing technology to be more miniaturized, more integrated, and have more modern functions such as automatic calibration, wireless manipulation, and human-machine compatibility. [0003] Noise or mechanical vibrations are common in the working environment of microelectronic devices. Since the energy consumption of such...

AI Technical Summary

Problems solved by technology

Since microelectronic devices do not necessarily consume energy all the time, they only consume energy when they need to be started, and the energy consumed by the device during each start-up is not necessarily equal to the energy extracted from the environment during the same period, and the current Piezoelectric energy harvesters have no energy storage function. When the vibration level of the environment is low, this type of energy harvester cannot guarantee the normal operation of microelectronic devices.

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