CN101202324A - Overall welding method of thermoelectric power generation module - Google Patents

Abstract

The invention belongs to an overall welding method for a thermoelectric power generation module, comprising the following steps: after cutting the heights of the P-type thermoelectric material and N-type thermoelectric material monomers welded in a single welding mold to be consistent, and then putting them into graphite material In the overall welding mold, the integrated electrode combination board with solder is placed on the P-type thermoelectric material and the N-type thermoelectric material in one-to-one correspondence, pressed by the overall mold pressure plate, put into the vacuum welding furnace, and welded at one time. The whole of the thermoelectric power generation module. Due to the use of the integrated electrode combination plate, multiple monomers can be butt-welded into a whole thermoelectric power generation module at one time, which makes the generator compact in structure, improves the mass specific power, and also improves the pass rate.

Description

Overall welding method of thermoelectric power generation module

technical field

The invention belongs to the technical field of thermoelectric module manufacturing, and in particular relates to an integral welding method of a thermoelectric power generation module.

Background technique

At present, the known thermoelectric power generation module adopts the split welding method. Generally, the cold and hot ends of the P-type material and the N-type material are welded with electrodes, and then the monomers are connected into a monomer pair with brazing material, and finally connected into a The combined strip is installed in the shell of the thermoelectric power generation module. Due to the inconsistent shrinkage of P-type materials and N-type materials within the welding temperature range, and the use of different solders, this method causes inconsistency in the height of P and N-type monomers during welding, which needs to be adjusted with springs during generator assembly. It brings a lot of unnecessary troubles to the assembly work, especially the compact structure of the micro-generator and the high heat utilization rate, and the split welding method cannot satisfy the performance of the micro-generator at all. The method assembles the monomer into strips, the structure is scattered, and the volume is large, which reduces the mass specific power of the thermoelectric power generation module.

Contents of the invention

In order to solve the problems existing in the prior art, the present invention provides an integrated thermoelectric power generation module with convenient operation, compact structure, high welding reliability, high mass specific power, and the ability to butt-weld multiple monomers into a whole at one time. Welding method.

The technical scheme that the present invention adopts for solving the technical problem existing in known technology is:

The overall welding method of the thermoelectric power generation module is characterized in that it includes the following steps:

1) Prepare the graphite material to make a matching bottom bracket, a positioning plate with multiple grooves and a mold cavity, put the positioning plate into the bottom bracket, put the hot end electrode on the groove of the positioning plate, and the mold cavity is formed by The bottom bracket is positioned on the positioning plate, and through the holes on the mold cavity, a P-type thermoelectric material and an N-type thermoelectric material are placed on each hot end electrode, and each P-type thermoelectric material and a The N-type thermoelectric material is added with a bead, pressed by the single mold pressure plate, put into the vacuum welding furnace, and the P-type thermoelectric material and N-type thermoelectric material are welded together with the hot end electrode to form a single pair;

2) Cut the height of one side of the P-type thermoelectric material and the N-type thermoelectric material to be consistent with the monomer, and then put it into the overall welding mold made of graphite material, and place the integrated electrode combination boards with solder one by one. On the top of the P-type thermoelectric material and the N-type thermoelectric material, it is pressed by the pressure plate of the integral mold, put into a vacuum welding furnace, and welded into a whole thermoelectric power generation module at one time.

The present invention can also take following technical measure to realize:

The integral welding method of the thermoelectric power generation module is characterized in that the welding temperature of the vacuum welding furnace in the step 1) is 300°C to 900°C.

The integral welding method of the thermoelectric power generation module is characterized in that the welding temperature of the vacuum welding furnace in the step 2) is 100-200°C.

The advantages and positive effects of the present invention are: due to the use of the integrated electrode combination plate, multiple monomers can be butt welded into a thermoelectric power generation module at one time, making the generator compact in structure, improving the mass specific power, and at the same time The pass rate has been improved.

Description of drawings

Fig. 1 is a flow chart of the overall welding method of the thermoelectric power generation module of the present invention;

Fig. 2 is the schematic diagram of the monomer pair welding mold used in making the monomer pair step in Fig. 1;

Fig. 3 is a schematic diagram of an integral welding mold used in the process of making the integral welding in Fig. 1 .

The labels in the figure are: 1. Monomer pair mold platen, 2. Bead, 3. Cavity, 4. Thermoelectric material, 5. Positioning plate, 6. Bottom bracket, 7. Bottom plate, 8. Horizontal insert, 9. Vertical insert, 10. Mold frame, 11. Integrated electrode combination plate, 12. Overall mold pressure plate, 13. Splint.

Detailed ways

In order to further understand the invention content, characteristics and effects of the present invention, the following embodiments are enumerated hereby, and detailed descriptions are as follows in conjunction with the accompanying drawings:

As shown in Figure 1, the overall welding method of the thermoelectric power generation module is through screening the materials, welding the P-type thermoelectric material and the N-type thermoelectric material into a single pair, and machining the P-type thermoelectric material with inconsistent height. The electric material and the N-type thermoelectric material are cut to the same height, and the integral thermoelectric power generation module is welded at one time by the integral welding mold with the integrated electrode assembly plate 11 .

As shown in Figure 2, firstly, the positioning plate 5 made of graphite material is placed in the inner groove of the bottom support 6, the height of the inner groove of the bottom support 6 is greater than the thickness of the positioning plate 5, and there are 3-6 positioning plates on the positioning plate 5 that match the shape of the hot end electrode. slots with the same size, after putting the hot end electrode of red copper material into the slot of positioning plate 5, the mold cavity 3 is placed on the positioning plate 5, and the outer diameter is just located in the inner slot of the bottom bracket 6, so as to position the mold cavity 3, and the mold cavity The cavity 3 has multiple pairs of double holes corresponding to the hot end electrodes, and a P-type thermoelectric material and an N-type thermoelectric material are placed in each pair of double holes, and the height of the thermoelectric material 4 is lower than The height of the mold cavity 3, add the bead 2 into the cavity hole above the thermoelectric material 4, and finally add the pressure plate 1, put it in a vacuum welding furnace for welding at 300°C to 900°C, and take it out to become a welded thermoelectric unit Yes, the P-type thermoelectric material and an N-type thermoelectric material with different heights on the single pair are cut by a cutting machine to the required height, and then put into the mold shown in Figure 3 for integral welding.

As shown in Figure 3, first put the mold frame 10 into the bottom plate 7, then put the single pairs of welded hot surface electrodes into the cavity of the overall welding mold respectively, and insert the horizontal inserts 8 and the longitudinal inserts 9 in sequence , in order to fix the monomer pair, cover the integrated electrode assembly plate 11 that has been coated with solder, and then press the integral mold pressure plate 12, and finally add the splint 13, adjust the distance between the base plate 1 and the splint 7, Then put it into a vacuum welding furnace and weld it once at 100-200°C.

To sum up, the thermoelectric power generation module welded by the overall welding method of the thermoelectric power generation module adopted in the present invention adopts the integrated electrode assembly plate, which makes the structure of the generator compact and improves the mass specific power.

Claims (3)

1. the integral welding method of temperature-difference power generation module is characterized in that: may further comprise the steps:

1) gets graphite material ready and make the collet that complements one another, the location-plate and the die cavity that have a plurality of grooves, location-plate is put into collet, on the groove of location-plate, put into the hot junction electrode, die cavity is placed on the location-plate by the collet location, by the hole on the die cavity, make and all be placed with a P type thermoelectric material and a N type thermoelectric material on each hot junction electrode, add ceiling molding at each P type thermoelectric material with above a N type thermoelectric material, push down by the monomer clamping cap, put into vacuum brazing stove, P type thermoelectric material and N type thermoelectric material and hot junction electrode are welded together, and it is right to become monomer;

2) monomer is consistent to the height cutting of P type thermoelectric material and N type thermoelectric material one side, after put into the integral solder mould that graphite material is made, the integrated electrode compoboard that will have scolder correspondence one by one is placed on P type thermoelectric material and above the N type thermoelectric material, push down by the unitary mould pressing plate, put into vacuum brazing stove, the disposable integral body that is welded into temperature-difference power generation module.

2. the integral welding method of temperature-difference power generation module according to claim 1, it is characterized in that: the welding temperature of vacuum brazing stove is 300 ℃～900 ℃ in the described step 1).

3. the integral welding method of temperature-difference power generation module according to claim 1 is characterized in that: the welding temperature of vacuum brazing stove is 100-200 ℃ described step 2).

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