Thermoelectric converting module and manufacturing method thereof

Abstract

Provided is a high temperature thermoelectric converting module including a plurality of p type thermoelectric elements; a plurality of n type thermoelectric elements; a plurality of electrodes; and a lead line. The plurality of p type thermoelectric elements, the plurality of n type thermoelectric elements, and the plurality of electrodes are electrically serially connected to each other, a pair of connecting lines that connects the lead line to one of the plurality of electrodes to output to the outside is further included, at least one electrode which is disposed at the high temperature side and the plurality of p type and n type thermoelectric elements are bonded with an intermediate layer therebetween. The plurality of p type and n type thermoelectric elements contain silicon as a component and the intermediate layer is formed as a layer containing aluminum and silicon and components other than silicon of the thermoelectric elements.

Description

technical field [0001] The present invention relates to a thermoelectric conversion module with improved bonding reliability between a thermoelectric conversion element and an electrode, and a method for manufacturing the same. Background technique [0002] A thermoelectric conversion module that converts thermal energy into electrical energy has advantages such as no drive unit, no vibration, and simple structure, and therefore requires no maintenance. However, thermoelectric conversion modules have been used in places with limited use, such as the universe, due to their low energy conversion efficiency. However, in recent years, due to environmental concerns, it has been attracting attention as a method of recovering thermal energy that has been wasted and discarded as waste heat in the past. It is expected to be used in automobiles, industrial furnaces, garbage incinerators, etc., and thermoelectric conversion modules are also desired. The cost is reduced and the durabil...

AI Technical Summary

Problems solved by technology

[0004] Conventionally, bismuth-tellurium-based thermoelectric conversion elements and electrodes are usually joined by soft solder materials such as solder. Under the environment, the soft solder material will melt and flow out, which may reduce the bonding reliability between the thermoelectric conversion element and the electrode. When the soft solder material is used, the heat resistance temperature of the thermoelectric conversion module has a limit

Images