Miniature thermoelectric module copper pillar electrode welding positioning device

Abstract

The application provides a micro thermoelectric component copper column electrode welding positioning device, which is used in the technical field of micro thermoelectric component welding, and comprises a component positioning unit and an electrode positioning unit, wherein the component positioning unit comprises a positioning seat, the positioning seat is provided with a positioning groove and a limiting mechanism; the electrode positioning unit comprises a pressing block and a pressing plate assembly, the pressing plate assembly is detachably connected with the positioning seat and is in clearance fit with the positioning groove, and the pressing plate assembly comprises a first pressing plate and a second pressing plate. The application fixes the to-be-welded thermoelectric component through the component positioning unit, fixes the copper column electrode through the electrode positioning unit, realizes accurate positioning of the to-be-welded thermoelectric component and the electrode positioning unit, ensures that the two are stable during the welding process, and thus improves the stability and quality of welding; the structure is simple and easy to manufacture, is not only easy to operate, but also is conducive to reducing the difficulty of welding operation, improving the safety and welding efficiency of welding operation.

Description

Technical Field

[0001] This invention belongs to the field of micro thermoelectric component welding technology, and in particular relates to a micro thermoelectric component copper column electrode welding positioning device. Background Technology

[0002] Thermoelectric components are widely used in various fields due to their long lifespan, pollution-free operation, noiseless operation, flexible installation, and precise temperature control. As electronic devices become increasingly miniaturized, the space available for their packaging is also shrinking, leading to the miniaturization of thermoelectric cooling components. For example, in optical communication modules, the optical chip is highly sensitive to temperature. To achieve cooling and precise temperature control within a confined space, miniature thermoelectric components are essential. A miniature thermoelectric component consists of an upper ceramic plate, a lower ceramic plate, a semiconductor element, and copper pillar electrodes. The welding quality and positioning accuracy of the copper pillar electrodes directly affect the performance and reliability of the miniature thermoelectric component. Due to the tiny size of the copper pillar electrodes in miniature thermoelectric components, existing welding and positioning devices suffer from the following problems:

[0003] (1) Insufficient positioning accuracy: Existing welding positioning devices are difficult to accurately position the micro copper column electrodes, resulting in welding position deviation and affecting the performance and reliability of thermoelectric components.

[0004] (2) Poor welding stability: During the welding process, the micro copper pillar electrode is prone to displacement, rotation and tilting, which makes it impossible to guarantee the welding quality and increases the risk of subsequent processes.

[0005] Therefore, there is an urgent need to develop a device that can accurately position and fix the copper column electrodes of micro thermoelectric components, enabling high-quality welding of the copper column electrodes to improve the electrical performance and reliability of micro thermoelectric components and meet the needs of industry development. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a welding and positioning device for copper pillar electrodes of a miniature thermoelectric component, which improves the positioning accuracy of the copper pillar electrodes and ensures the stability and quality of the welding process.

[0007] The technical solution adopted in this invention is: a welding and positioning device for copper column electrodes of a micro thermoelectric component, comprising:

[0008] The component positioning unit includes a positioning seat, which is provided with a positioning groove for positioning the thermoelectric component to be soldered and a limiting mechanism for pressing against the thermoelectric component to be soldered.

[0009] The electrode positioning unit includes a pressure block for pressing down on a copper column electrode and a pressure plate assembly for fixing the pressure block and the copper column electrode. The pressure plate assembly is detachably connected to the positioning seat and is clearance-fitted with the positioning groove so that the welding equipment can perform welding operations through the gap between them.

[0010] Furthermore, the shape of the positioning groove is adapted to the outer contour of the thermoelectric component to be soldered, and a top support structure is provided for cooperating with the limiting mechanism to limit the thermoelectric component to be soldered.

[0011] Furthermore, the limiting mechanism includes a limiting top member, a movable block, and an elastic member. One end of the elastic member is connected to the positioning seat, and the other end is connected to the movable block. The limiting top member is connected to the end of the movable block opposite to the elastic member, and can abut against the corner of the thermoelectric component to be welded under the action of the elastic member.

[0012] Furthermore, the end shape of the limiting top member is adapted to the corner of the thermoelectric component to be welded.

[0013] Furthermore, the positioning seat is also provided with a limiting groove, which is adapted to the movable block to limit the movement path and movement range of the movable block.

[0014] Furthermore, the movable block is also provided with a limiting pin, and the limiting groove is provided with a limiting hole that matches the limiting pin.

[0015] Furthermore, the movable block is also equipped with a push rod for pushing the movable block to move.

[0016] Furthermore, the pressure plate assembly includes a first pressure plate and a second pressure plate. The first pressure plate is provided with a first positioning hole adapted to the copper column electrode. The second pressure plate is disposed above the second pressure plate and is provided with a second positioning hole adapted to the pressure block. The second positioning hole communicates with the first positioning hole, and the size of the pressure block is larger than that of the copper column electrode.

[0017] Furthermore, the second pressure plate is also provided with a locking hole communicating with the second positioning hole, for fixing the pressure block by a positioning pin.

[0018] Furthermore, the positioning seat is also provided with a handle to facilitate hand movement of the positioning seat.

[0019] The advantages and positive effects of this invention are as follows: This application uses a component positioning unit to fix the thermoelectric component to be welded and an electrode positioning unit to fix the copper column electrode. The two work together to achieve precise positioning of the thermoelectric component to be welded and the electrode positioning unit. At the same time, by setting a limiting mechanism, the thermoelectric component to be welded is stably fixed at the welding station, and by setting a pressure plate assembly, the copper column electrode is firmly fixed at the welding position. This ensures that both remain stable during the welding process and prevents problems such as displacement, rotation, and tilting, thereby improving the stability and quality of welding. This application has a simple structure and is easy to manufacture. It is not only easy to operate, but also helps to reduce the difficulty of welding operations and improve the safety and efficiency of welding operations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the thermoelectric component structure according to a specific embodiment of the present invention;

[0021] Figure 2 This is a structural schematic diagram of a specific embodiment of the present invention;

[0022] Figure 3 This is a top view of a specific embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the positioning seat and limiting mechanism structure according to a specific embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the first pressure plate structure according to a specific embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the second pressure plate structure according to a specific embodiment of the present invention.

[0026] In the picture:

[0027] 1. Miniature thermoelectric component; 11. Upper ceramic plate; 12. Lower ceramic plate; 13. Semiconductor element; 14. Copper column electrode; 2. Positioning seat; 21. Positioning groove; 211. Top support structure; 212. Limiting angle; 22. Limiting mechanism; 221. Limiting top piece; 222. Movable block; 223. Elastic element; 224. Limiting pin; 225. Push rod; 23. Limiting groove; 24. Handle; 3. Pressure plate assembly; 31. First pressure plate; 311. First positioning hole; 312. Groove; 32. Second pressure plate; 321. Second positioning hole; 322. Locking hole; 4. Pressure block. Detailed Implementation

[0028] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0029] like Figure 1As shown, the present invention provides a welding and positioning device for copper pillar electrodes of a micro thermoelectric component, which is used to position and fix the micro thermoelectric component 1 and the copper pillar electrode 14 to be welded, so as to weld the two together, thereby solving the problem in the prior art that the copper pillar battery of the micro thermoelectric component is difficult to position and has poor welding stability due to its small size.

[0030] In this embodiment of the application, the specific structure of the micro thermoelectric component 1 is as follows: Figure 1 As shown, the device includes an upper ceramic plate 11, a lower ceramic plate 12, a semiconductor element 13, and a copper pillar electrode 14. The upper ceramic plate 11 and the lower ceramic plate 12 serve as an upper cover and a lower cover, respectively. The semiconductor element 13 is located between the two to achieve the thermoelectric effect. The copper pillar electrode 14 is disposed on the extended end of the lower ceramic plate 12, with its bottom end connected to the electrode of the semiconductor element 13 and its top end used for connection to an external circuit. The substrate of the copper pillar electrode 14 can be copper or its alloys, and its surface can be electroplated with materials such as nickel, tin, and gold. Typically, the copper pillar electrode 14 is cubic or cylindrical in shape.

[0031] like Figure 2 , Figure 3 As shown, this application proposes a micro thermoelectric component copper column electrode welding positioning device, including a component positioning unit and an electrode positioning unit: the component positioning unit is used to fix the thermoelectric component to be welded, including a positioning seat 2, the positioning seat 2 is provided with a positioning groove 21 for positioning the thermoelectric component to be welded and a limiting mechanism 22 for pressing the thermoelectric component; the electrode positioning unit is used to fix the copper column electrode 14, including a pressing block 4 for pressing the copper column electrode 14 and a pressure plate assembly 3 for fixing the pressing block 4 and the copper column electrode 14, the pressure plate assembly 3 is detachably connected to the positioning seat 2 and has a clearance fit with the positioning groove 21 so that the welding equipment can perform welding operations through the gap between the two.

[0032] The aforementioned positioning seat 2 is a flat plate structure, but it can also be designed as a platform-like structure with a flat surface; no limitation is made here. A positioning groove 21 is provided on the upper end face of the positioning seat 2. The positioning groove 21 is used to accommodate the thermoelectric component to be welded. A limiting mechanism 22 is provided on the positioning seat 2 at a position that can align and connect with the positioning groove 21, so that the thermoelectric component to be welded can be fixed against and fixed in the set position of the positioning groove 21 by the limiting mechanism 22. This position is defined as the welding station. The pressure plate assembly 3 is constructed at a position corresponding to this welding station. After the thermoelectric component to be welded is placed in this welding station, the pressure plate assembly 3 is installed on the positioning seat 2, so that the copper... The column electrode 14 is aligned and connected with the part to be welded of the thermoelectric component to be welded. Then, the pressure block 4 is pressed on the top of the copper column electrode 14, and the pressure block 4 is fixed by the pressure plate assembly 3, so that it can provide sufficient pressure to the copper column electrode 14 to prevent the copper column electrode from shifting, rotating and tilting during the welding process, which would have an adverse effect on the welding stability and welding quality. At the same time, there is a sufficient gap between the pressure plate assembly 3 and the positioning groove 21. When the thermoelectric component to be welded and the copper column electrode 14 are in the welding position, the connection part of the two corresponds to the gap, so that the welding equipment can pass through the gap to perform welding operations.

[0033] Through the above technical solution, the positioning groove 21, the limiting mechanism 22, the pressure plate assembly 3 and the pressure block 4 cooperate with each other to press and fix the thermoelectric component to be welded and the copper column electrode 14 respectively at the welding station. This can effectively achieve precise positioning of the thermoelectric component to be welded and the copper column electrode 14, and ensure that they remain stable during the welding process, preventing problems such as displacement, rotation and tilting, thereby improving the stability and quality of welding.

[0034] In a preferred embodiment, to meet the space requirements of the welding operation, the positioning groove 21 is provided at one end of the positioning seat 2, and the welding station can be set near this end. At the same time, when the thermoelectric component to be welded is placed, the welding part faces the side near this end, and the limiting mechanism 22 is set at the position opposite to the positioning groove 21 of the positioning seat 2. When the welding operation is performed, the welding gun outlet of the welding equipment is set at one end near the positioning groove 21, which not only provides more room for the welding equipment to move around and facilitates operation, but also avoids mutual obstruction between the welding equipment and the limiting mechanism 22, thereby improving the efficiency and safety of the welding operation.

[0035] like Figure 4As shown, the shape of the positioning groove 21 is adapted to the outer contour of the thermoelectric component to be soldered. Typically, the outer contour of the thermoelectric component to be soldered is square. In this embodiment, the positioning groove 21 is also constructed as a square, and its size is slightly larger than the outer contour of the thermoelectric component to be soldered. This allows the thermoelectric component to be soldered to be easily placed into the positioning groove 21 without forceful squeezing, avoiding damage to the edges of the thermoelectric component. The positioning groove 21 is provided with a top support structure 211, which works in conjunction with the limiting mechanism 22 to limit the thermoelectric component. In this embodiment, the top support structure 211 and the limiting mechanism 22 are arranged opposite to each other, enabling the limiting of the four end faces of the thermoelectric component to be soldered. This ensures the thermoelectric component is stably fixed at the welding station, achieving alignment and connection with the copper column electrode 14, ensuring accurate relative positioning, and effectively improving positioning efficiency while reducing positioning difficulty.

[0036] like Figure 4 As shown, the aforementioned limiting mechanism 22 includes a limiting top member 221, a movable block 222, and an elastic member 223. One end of the elastic member 223 is connected to the positioning seat 2, and the other end is connected to the movable block 222. The limiting top member 221 is connected to the end of the movable block 222 opposite to the elastic member 223, and can abut against the corner of the thermoelectric component to be welded under the action of the elastic member 223. Preferably, the central axis of the elastic member 223 is parallel to the line connecting the corner and the center of the thermoelectric component to be welded, and is in a contracted state. Under the action of the contraction pressure, it pushes the movable member and the limiting top member 221 to move in the opposite direction, thereby pushing the thermoelectric component to be welded to move in the opposite direction until the two end faces of the thermoelectric component to be welded opposite to the corner abut against the side wall of the positioning groove 21 and at least one top support structure 211, respectively. At this time, the position of the thermoelectric component to be welded is the welding station, thereby realizing the rapid and accurate positioning of the thermoelectric component to be welded.

[0037] The end shape of the aforementioned limiting top member 221 is adapted to the corner of the thermoelectric component to be welded, so that it can abut against the end faces on both sides of the corner, effectively pushing the thermoelectric component to be welded to the welding station.

[0038] Preferably, such as Figure 4As shown, the positioning groove 21 is also provided with a limiting angle 212. The limiting angle 212, the top support structure 211, and the limiting top piece 221 correspond to the four corners of the thermoelectric component to be welded. By setting the limiting angle 212 and the top support structure 211, it is easier to place the thermoelectric component to be welded in the correct initial position in the positioning groove 21, so that the limiting top piece 221 is aligned with the corresponding corner of the thermoelectric component to be welded. When the thermoelectric component to be welded moves to the welding station under the push of the limiting top piece 221, the two corners of the thermoelectric component to be welded abut against the two top support structures 211 respectively. The two top support structures 211 and the limiting top piece 221 abut against the three corners of the thermoelectric component to be welded, thereby forming a stable limit on the thermoelectric component to be welded, preventing it from moving during the welding process. While ensuring accurate positioning, it also improves the stability of the welding operation.

[0039] In a specific embodiment, such as Figure 4 As shown, the positioning groove 21 extends to the end of the positioning seat 2. The welding station is at a set distance from this end. The two side walls of the positioning groove 21 narrow at the corresponding position of the welding station to form a top support structure 211. The distance between the two narrowed side walls is less than the corresponding width of the thermoelectric component to be welded, so as to form an effective limit on the thermoelectric component to be welded.

[0040] Furthermore, the positioning seat 2 is also provided with a limiting groove 23, which is adapted to the movable block 222 to limit the movement path and range of the movable block 222. Specifically, the elastic element 223 is connected to one end of the limiting groove 23, and the opposite ends of the movable element are slidably connected to the side wall of the limiting groove 23, allowing it to move along the limiting groove 23 under the action of the elastic element 223. When the thermoelectric component to be welded moves to the welding station, the side wall of the limiting groove 23 just abuts against the other end face of the movable block 222 relative to the elastic element 223. At this time, three end faces of the movable block 222 are in contact with the side wall of the limiting groove 23, and the other end abuts against the elastic element 223. Through this design, not only is the movement of the movable block 222 more precise and stable, but it is also firmly fixed in the limiting groove 23, preventing lateral movement during the welding process.

[0041] The aforementioned movable block 222 is also provided with a limiting pin 224, and a limiting hole adapted to the limiting pin 224 is provided in the limiting groove 23. When the thermoelectric component to be welded moves to the welding station and the movable block 222 moves to one end of the limiting groove 23, the limiting hole and the limiting pin 224 are in corresponding positions. Preferably, the limiting pin 224 is threadedly engaged with the limiting hole. By screwing the limiting pin 224 into the limiting hole, the movable block 222 can be fixed in the limiting groove 23. This design not only allows the limiting top piece 221 to better limit the thermoelectric component to be welded, but also prevents the movable block 222 from vibrating under the influence of welding operations, further enhancing the positioning accuracy and the stability of welding operations.

[0042] Preferably, the movable block 222 is also provided with a push rod 225 for pushing the movable block 222 to move. By pushing the push rod 225 in the opposite direction, it is convenient to place the thermoelectric cooling component to be welded in the positioning groove 21 before welding, and to release the limiting top piece 221 from the welded thermoelectric component after the welding operation is completed, so as to conveniently take out the thermoelectric component.

[0043] like Figure 5 , Figure 6 As shown, the pressure plate assembly 3 in this application includes a first pressure plate 31 and a second pressure plate 32. The first pressure plate 31 is provided with a first positioning hole 311 adapted to the copper column electrode 14. The second pressure plate 32 is located above the pressure plate 32 and is provided with a second positioning hole 321 adapted to the pressure block 4. The second positioning hole 321 communicates with the first positioning hole 311, and the size of the pressure block 4 is larger than the size of the copper column electrode 14. Specifically, the first pressure plate 31, the second pressure plate 32, and the positioning seat 2 are provided with matching assembly holes, so that the first pressure plate 31 and the second pressure plate 32 can be fixed to the positioning seat 2 by pins. The positioning seat 2 is set to a specific position. This position allows the positioning hole of the first pressure plate 31 to be aligned with the welding area of ​​the thermoelectric component to be welded. The copper column electrode 14 is placed into the first positioning hole 311, and the copper column electrode 14 falls onto the welding area under the action of gravity. At this time, the distance between the upper end face of the first pressure plate 31 and the welding area is less than the length of the copper column electrode 14, so that the upper end of the copper column electrode 14 protrudes from the first pressure plate 31. The pressure block 4 located in the second positioning hole 321 presses the copper column electrode 14 under the action of gravity, thereby fixing the copper column electrode 14. By setting the first positioning hole 311, precise positioning and lateral limiting of the copper column electrode 14 are achieved. By setting the pressure block 4 and the second pressure plate 32, vertical limiting of the copper column electrode 14 is achieved, thereby ensuring the accurate relative position of the copper column electrode 14 and the thermoelectric component to be welded, and improving the stability of the welding operation.

[0044] Furthermore, to prevent the pressure block 4 from vibrating under the influence of welding operations, the second pressure plate 32 is also provided with a locking hole 322 communicating with the second positioning hole 321. The locking hole 322 is perpendicular to the second positioning hole 321 and is used to fix the pressure block 4 by a positioning pin. Specifically, the positioning pin is threaded into the locking hole 322, so that the pressure block 4 is stably fixed in the second positioning hole 321, which further improves the stability of the welding operation.

[0045] In a preferred embodiment, the first positioning plate has a groove 312 at a position corresponding to the limiting groove 23. The groove 312 and the limiting groove 23 form an opening of sufficient size to allow the welding equipment to perform welding operations through the opening. The opening in this application can be adapted to welding equipment used in commonly used welding methods such as reflow soldering, laser welding, or gas phase welding.

[0046] Furthermore, the positioning base 2 is also provided with a handle 24 to facilitate hand movement of the positioning base 2.

[0047] This application uses a component positioning unit to fix the thermoelectric component to be welded and an electrode positioning unit to fix the copper column electrode. The two work together to achieve precise positioning of the thermoelectric component to be welded and the electrode positioning unit. At the same time, by setting a limiting mechanism, the thermoelectric component to be welded is stably fixed at the welding position, and by setting a pressure plate assembly, the copper column electrode is firmly fixed at the welding part. This ensures that both remain stable during the welding process and prevents problems such as displacement, rotation, and tilting, thereby improving the stability and quality of welding. This application has a simple structure and is easy to manufacture. It is not only easy to operate, but also helps to reduce the difficulty of welding operations, improve the safety of welding operations, and increase welding efficiency.

[0048] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made in accordance with the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A welding and positioning device for copper column electrodes of a miniature thermoelectric component, characterized in that, include: The component positioning unit includes a positioning seat, which is provided with a positioning groove for positioning the thermoelectric component to be soldered and a limiting mechanism for pressing against the thermoelectric component to be soldered. An electrode positioning unit includes a pressure block for pressing down a copper column electrode and a pressure plate assembly for fixing the pressure block and the copper column electrode. The pressure plate assembly is detachably connected to the positioning seat and is clearance-fitted with the positioning groove so that the welding equipment can perform welding operations through the gap between them. The pressure plate assembly includes a first pressure plate and a second pressure plate. The first pressure plate has a first positioning hole adapted to the copper column electrode. The second pressure plate is disposed above the first pressure plate and has a second positioning hole adapted to the pressure block. The second positioning hole communicates with the first positioning hole, and the size of the pressure block is larger than the copper column electrode. The second pressure plate is also provided with a locking hole communicating with the second positioning hole, for fixing the pressure block by a positioning pin; The limiting mechanism includes a limiting top member, a movable block, and an elastic member. One end of the elastic member is connected to the positioning seat, and the other end is connected to the movable block. The limiting top member is connected to the end of the movable block opposite to the elastic member, and can abut against the corner of the thermoelectric component to be soldered when the elastic member moves. The end shape of the limiting top member is adapted to the corner of the thermoelectric component to be soldered.

2. The micro thermoelectric component copper column electrode welding and positioning device according to claim 1, characterized in that: The shape of the positioning groove is adapted to the outer contour of the thermoelectric component to be welded, and it is provided with a top support structure for cooperating with the limiting mechanism to limit the thermoelectric component to be welded.

3. The micro thermoelectric component copper column electrode welding and positioning device according to claim 2, characterized in that: The positioning seat is also provided with a limiting groove, which is adapted to the movable block to limit the movement path and movement range of the movable block.

4. The micro thermoelectric component copper column electrode welding and positioning device according to claim 3, characterized in that: The movable block is also provided with a limiting pin, and the limiting groove is provided with a limiting hole that matches the limiting pin.

5. The micro thermoelectric component copper column electrode welding and positioning device according to any one of claims 1-4, characterized in that: The movable block is also equipped with a push rod for pushing the movable block to move.

6. The micro thermoelectric component copper column electrode welding and positioning device according to claim 1, characterized in that: The positioning base is also provided with a handle to facilitate hand movement of the positioning base.

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