Temperature difference generator welding method

Abstract

The present invention belongs to a welding method of thermo-generator. Said welding method includes the following steps: using mould to respectively make N-type material and P-type material into circular cylinder, placing lower electrode, N-type material and upper electrode into one hole of mould cavity body, placing them into a furnace to make welding, after they are taken out, making secondary welding on said N-type material, placing copper inducer into lower mould cavity, covering tray and baseplate, adding silver-copper filler metal, placing N-type monomer on which the electrode is welded into left mould hole of mould cavity, successively placing lower electrode, P-type material and upper electrode into right mould hole, covering mould cavity, covering positioning plate, making screw be aligned with centre of welding piece, fixing them by using nut, regulating screw on the positioning plate, placing the thermo-generator welding device into furnace, then making N-type material and P-type material be welded together.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric generator manufacturing, and in particular relates to a thermoelectric generator welding method. Background technique [0002] The thermoelectric generator consists of two different metals to form a closed loop. When there is a temperature difference between the two joints, a current will be generated in the loop. This effect constitutes a thermoelectric generator. [0003] The currently known thermoelectric welding method is to use SnTe as the solder to weld the flat pure iron electrode and the P and N-type thermoelectric materials to form a single unit, and then use AgCu as the solder to connect the two thermoelectric units into a single unit. The pair of π constitutes the most basic thermoelectric generator; in this process, the two thermoelectric materials are subjected to two high-temperature shocks. Due to the requirements of different P and N-type thermoelectric materials for welding...

AI Technical Summary

Problems solved by technology

[0003] The currently known thermoelectric welding method is to use SnTe as the solder to weld the flat pure iron electrode and the P and N-type thermoelectric materials to form a single unit, and then use AgCu as the solder to connect the two thermoelectric units into a single unit. The pair of π constitutes the most basic thermoelectric generator; in this process, the two thermoelectric materials are subjected to two high-temperature shocks. Due to the requirements of different P and N-type thermoelectric materials for welding materials, welding temperature requirements and high temperature resistance Different requirements for the number of impacts lead to large contact resistance and poor joint strength after welding. The welding quality of the single material directly affects the thermoelectric conversion efficiency, life, and impact resistance of the generator.

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