Temperature difference and vibration composite piezoelectric energy capture battery

Abstract

The invention relates to a temperature difference and vibration composite piezoelectric energy capture battery, which comprises a battery top cover, an upper battery case, a low battery case, a heat absorbing base, an upper spring, a lower spring, an upper piezoelectric cantilever beam, a lower piezoelectric cantilever beam, a transmission rod, a dish-shaped thermal bimetallic sheet holder and a dish-shaped thermal bimetallic sheet. Wherein the battery top cover, the upper battery shell, the lower battery shell and the heat absorbing base constitute a battery shell part; the upper spring, thelower spring, the upper piezoelectric cantilever beam, the lower piezoelectric cantilever beam, the transmission rod, the dish-shaped thermal bimetallic sheet holder and the dish-shaped thermal bimetallic sheet constitute a piezoelectric power generation part. When the device is vibrated or the heat absorbing base senses the ambient high temperature, reciprocating vibration of the upper and lowerpiezoelectric cantilever beams occurs, which improves the efficiency of energy capture. When the device is arranged in the MEMS device, the requirement for supplying power to the MEMS device can be met, and the device has the advantages of simple structure, strong environmental adaptability, high energy capture efficiency and easy integration.

Description

technical field [0001] The invention belongs to the field of piezoelectric power generation, and in particular relates to a temperature difference and vibration composite piezoelectric energy harvesting battery. Background technique [0002] In recent years, with the application of micro-electro-mechanical devices (MEMS) in wireless sensor network nodes, military weapons, aerospace, medical and other fields, the power supply of micro-electro-mechanical devices has attracted widespread attention. Traditional chemical batteries have problems such as limited battery life, difficulty in integration, poor environmental adaptability, and pollution. Traditional line power supply cannot be applied to micro-electromechanical devices in specific occasions. Therefore, more and more attention has been paid to self-powered equipment, and equipment using solar power, electromagnetic power, temperature difference power, vibration power, and wind power has emerged in an endless stream, but ...

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Problems solved by technology

[0003] In order to solve the problem that the current piezoelectric energy harvesting device using vibration can only generate electricity using a single environment vibration, a temperature difference and vibration composite piezoelectric energy harvesting battery is proposed.

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