CN-122003087-A - Manufacturing method of thermoelectric power generation device

CN122003087ACN 122003087 ACN122003087 ACN 122003087ACN-122003087-A

Abstract

The invention discloses a manufacturing method of a thermoelectric power generation device, and aims to solve the defects that the existing thermoelectric power generation device is low in tolerance temperature and affects power generation efficiency. The method comprises the following steps of S1, attaching a protective layer on the surface of a thermoelectric material, cutting the thermoelectric material to form thermoelectric particles, S2, arranging the thermoelectric particles in a positioning die, S3, pouring heat-resistant fixing liquid into the positioning die, solidifying the heat-resistant fixing liquid to form a semi-finished product, S4, processing the surface of the semi-finished product to expose the end faces of the thermoelectric particles, S5, respectively connecting welding frames on two sides of the semi-finished product, arranging a plurality of grooves on the welding frames, and pouring molten ZnAl soldering paste into the grooves to realize welding among the thermoelectric particles. The thermoelectric power generation device manufactured by the method has high tolerance temperature, improves the power generation efficiency and adaptability of the product, and is favorable for promoting the commercial application of the thermoelectric power generation device.

Inventors

LI MING
WU YONGQING
CUI BORAN
TANG ZEFENG
LIU FENG

Assignees

浙江先导热电科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251107

Claims (10)

1. A manufacturing method of a thermoelectric power generation device is characterized by comprising the following steps of S1, attaching a protective layer on the surface of a thermoelectric material, cutting the thermoelectric material to form thermoelectric particles, S2, arranging the thermoelectric particles in a positioning die, S3, pouring heat-resistant fixing liquid into the positioning die, solidifying the heat-resistant fixing liquid to form a semi-finished product, S4, processing the surface of the semi-finished product to expose the end faces of the thermoelectric particles, S5, respectively connecting welding frames on two sides of the semi-finished product, arranging a plurality of grooves on the welding frames, and pouring molten ZnAl soldering paste into the grooves to realize welding among the thermoelectric particles.
2. The method for manufacturing a thermoelectric power generation device according to claim 1, wherein an electrode patch is attached to the surface of the semi-finished product after S4.
3. The method of manufacturing a thermoelectric power generation device according to claim 1, wherein the protective layer comprises a nickel layer and an aluminum layer, and the aluminum layer covers the nickel layer.
4. The method for manufacturing a thermoelectric power generation device according to claim 3, wherein the thickness of the nickel layer is 10-100 μm, and the thickness of the aluminum layer is 10-200 μm.
5. The manufacturing method of the thermoelectric power generation device is characterized in that a sinking groove is formed in a positioning die, a plurality of positioning grooves are formed in the bottom of the sinking groove, the positioning grooves are matched with thermoelectric particles, lifting blocks are arranged at the bottoms of the positioning grooves, lifting plates are arranged below the positioning die and connected with the lifting plates through connecting rods, S2 thermoelectric particles are placed in the positioning grooves, and after S3 heat-resistant fixing liquid is poured, the lifting plates are lifted, and the thermoelectric particles are pushed to be lifted through the lifting blocks so that the thermoelectric particles are completely immersed in the heat-resistant fixing liquid.
6. The method for manufacturing a thermoelectric power generation device according to claim 1, wherein S4 is a grinding or milling method for processing the surface of the semi-finished product.
7. The method for manufacturing a thermoelectric power generation device according to claim 1, wherein the heat-resistant fixing liquid is gypsum liquid.
8. A method of fabricating a thermoelectric device according to any one of claims 1 to 7, wherein the protective layer is attached to the surface of the thermoelectric material by any one of dip plating, electroplating, spray coating, and sputtering vacuum plating.
9. The method of manufacturing a thermoelectric power generation device according to any one of claims 1 to 7, wherein the thermoelectric material is any one of bismuth telluride, lead telluride, and tin selenide.
10. A method of manufacturing a thermoelectric power generating device as claimed in any one of claims 1 to 7, wherein the welding frame is made of gypsum.

Description

Manufacturing method of thermoelectric power generation device Technical Field The invention relates to the technical field of thermoelectric semiconductors, in particular to a manufacturing method of a thermoelectric power generation device. Background The semiconductor refrigerating sheet generates electricity in a novel electricity generation mode, and the principle of the semiconductor refrigerating sheet generates electricity by utilizing the thermoelectric effect of semiconductor materials. When the temperatures of the two ends of the semiconductor material are different, a potential difference is generated, thereby generating a current. The semiconductor refrigerating sheet has high efficiency, environmental protection and safety in power generation. No pollutant is generated in the power generation process, and no influence is caused on the environment. No fuel is required to be combusted, so that potential safety hazards such as fire and explosion do not exist. The application range of the semiconductor refrigerating sheet for generating electricity is very wide. It can be used for converting various energy sources such as solar energy, geothermal energy, biomass energy and the like. The semiconductor refrigeration sheet generates electricity as a novel energy source with high efficiency, environmental protection and safety, and can be widely applied and popularized. At present, the power generation application based on bismuth telluride is still low in conversion efficiency, the efficiency of the thermoelectric power generation module depends on temperature difference, the traditional TEG adopts a solder brazing technology, but brazing materials such as SAC, 95Sn5Sb, auSn and the like which can realize mass production have a melting point of only 200 degrees, the hot end can only work at about 200-230 degrees at the highest, attenuation is serious, and commercial popularization and use of the thermoelectric power generation module are limited. The Chinese patent application number 2011100095050 discloses a manufacturing method of a high-temperature-resistant thermoelectric device, and in the using process of the thermoelectric device, even if the temperature of a hot end exceeds the melting point of solder to cause the solder at a joint part to melt, the device can still reliably work due to the effect of the surrounding solid sealing glue, and the highest temperature which can be born by the hot end of the thermoelectric device is greatly improved. Although the temperature of the solder can be reduced by surrounding sealing compound, the effect is limited, the high temperature bearing capacity of the hot end is poor, and the attenuation is serious. Disclosure of Invention In order to overcome the defects, the invention provides a manufacturing method of the thermoelectric power generation device, and the manufactured thermoelectric power generation device has high tolerance temperature, improves the power generation efficiency of products, and is favorable for promoting the commercial application of the thermoelectric power generation device. The manufacturing method of the thermoelectric power generation device comprises the following steps of S1, adhering a protective layer on the surface of a thermoelectric material, cutting the thermoelectric material to form thermoelectric particles, S2, arranging and placing the thermoelectric particles in a positioning die, S3, pouring heat-resistant fixing liquid into the positioning die, solidifying the heat-resistant fixing liquid to form a semi-finished product, S4, processing the surface of the semi-finished product to expose the end faces of the thermoelectric particles, S5, connecting welding frames on two sides of the semi-finished product respectively, arranging a plurality of grooves on the welding frames, and pouring molten ZnAl soldering paste into the grooves to realize welding among the thermoelectric particles. In the application, the protective layer is attached to the surface of the thermoelectric material, so that the thermoelectric material is protected, and the thermoelectric performance is improved. After the thermoelectric particles are arranged, the heat-resistant fixing liquid is poured into the thermoelectric device, and the thermoelectric particles are positioned after the heat-resistant fixing liquid is solidified, so that the position accuracy of the thermoelectric particles is ensured, and the heat-resistant fixing liquid is high-temperature-resistant, so that the thermoelectric power generation device can resist higher temperature, and the power generation efficiency is improved. The molten ZnAl soldering paste is poured into the grooves to realize welding among thermoelectric particles, and the ZnAl soldering paste has high melting point, so that the temperature tolerance of the product is improved, the temperature difference of the product is increased, and the power generation efficiency and the adaptability of the product