The power generation and thermal stress of a segmented thermoelectric generator (TEG) under a pulsed heat source are analyzed in this paper. The distribution of thermal stress in four-part thermoelectric materials and its development over time are discussed. The influence of duty cycle on the maximum thermal stress is analyzed. The effects of welding layer thickness on thermal stress and output energy are also discussed. The results show that reducing the duty cycle can increase the amount of power generated, accompanied by an increase in thermal stress. Increasing the thickness of the welding layer can effectively reduce the thermal stress in the bismuth telluride layer. Detailed analysis of thermal stress in thermoelectric materials under pulsed heat sources with different duty cycles can provide guidance for the structural design and reliability analysis in the practical application of a TEG.

本文分析了脉冲热源作用下分段热电发电机的发电和热应力。讨论了四部分热电材料中的热应力分布及其随时间的发展。分析了占空比对最大热应力的影响。还讨论了焊接层厚度对热应力和输出能量的影响。结果表明，降低占空比可以增加发电量，并伴有热应力的增加。增加焊接层的厚度可以有效地降低碲化铋层中的热应力。