基于碲化铋基柔性热电器件的自取能温度传感器结构设计及性能研究

doi:10.11896/cldb.22080105

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Abstract In this work, the switchgear contact, which is easy to heat, was taken as the subject, and the bismuth telluride based flexible thermoelectric device was selected to construct the self-powered temperature sensor. The flexible thermoelectric technology and wireless sensing technology were combined to develop a self-extracting and plastic temperature sensing device, which can fully adapt to the operating characteristics of power equipment and realize online sensing of temperature parameters of power grid equipment operating state. The effects of environment (temperature and convective heat transfer coefficient), device topology (height and filling rate), interface contact resistance/thermal resistance on the output performance of flexible thermoelectric devices were systematically studied through finite element simulations in COMSOL software. The results show that, under the boundary conditions of hot end temperature of 308.15 K, ambient temperature of 288.15 K and convective heat transfer coefficient of 5 W/(m²·K), the maximum output voltage and power of thermoelectric device with thermoelectric arm height 2 mm and filling rate 15% can reach 95 mV and 0.83 mW, respectively. It meets the power demand of transmission voltage signal of wireless communication module well. Reducing ambient temperature, increasing convective heat transfer coefficient, optimizing thermoelectric arm height or filling rate, or reducing interface contact resistance/thermal resistance can improve the open-circuit voltage and output power of thermoelectric devices.

Key words： bismuth telluride based flexible thermoelectric device self power temperature sensor finite element simulation

Published: 25 March 2024 Online: 2024-04-07

CLC number:

TG132.24

Fund:Science and Technology Program from State Grid Corporation of China (5500-202055253A-0-0-00).

Corresponding Authors: ^*pengwyw@163.com

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	PENG Peng
	SHAO Yuying
	HU Haimin
	LI Zhenming
	LIU Wei

Cite this article:

PENG Peng,SHAO Yuying,HU Haimin, et al. Structure Design and Performance Analysis of Self-powered Temperature Sensor Based on Bismuth Telluride Flexible Thermoelectric Device[J]. Materials Reports, 2024, 38(6): 22080105-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22080105 OR http://www.mater-rep.com/EN/Y2024/V38/I6/22080105

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