CN218918798U - IGBT module welding fixture - Google Patents
IGBT module welding fixture Download PDFInfo
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- CN218918798U CN218918798U CN202222616380.4U CN202222616380U CN218918798U CN 218918798 U CN218918798 U CN 218918798U CN 202222616380 U CN202222616380 U CN 202222616380U CN 218918798 U CN218918798 U CN 218918798U
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- heat conduction
- igbt module
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- module welding
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Abstract
The utility model discloses an IGBT module welding tool, which comprises the following steps: an upper cover, the bottom of which is provided with a plurality of feasible contact parts, and which can be covered on the top of the positioning part; a positioning part, the top of which is provided with a plurality of first positioning structures and the bottom of which is provided with a plurality of second positioning structures; a first positioning structure for positioning a contact position between the upper cover and the positioning portion; a second positioning structure for positioning a contact position between the positioning portion and the welded product; and the heat conduction part is provided with a third positioning structure at four corners at the top and an arc-shaped heat conduction plate inside. The utility model can adapt to the radian of the pin fin or the falt cooling bottom, avoid uneven heating caused by temperature difference between the two ends and the middle position of the cooling bottom plate, improve the heat conduction efficiency and reduce the manufacturing cost.
Description
Technical Field
The utility model relates to the field of automobile power semiconductors, in particular to an IGBT module welding tool.
Background
With the development of semiconductor technology, the demand of a power module is increasing, and under the application environment of high voltage and high current, the power module can generate a great amount of heat as a semiconductor device. Therefore, a larger cooling floor is required to solve the heat dissipation problem. Currently, the dominant cooling floors are Flat cooling floors and Pinfin cooling floors, as shown with reference to fig. 1 and 2.
Most welding tools aiming at a flat cooling bottom plate in the current industry are more, such as Chinese patent numbers: CN210607217U. When the welding tool is used for welding, the copper bottom plate is firstly placed on the upper surface of the heating plate, the DBC plate is horizontally placed on the upper surface of the copper bottom plate, the welding flux is arranged between the DBC plate and the copper bottom plate, heat is conducted to the cooling bottom plate after the heating plate heats, and the welding flux between the DBC plate and the upper surface of the copper bottom plate is melted along with the temperature rise of the cooling plate, so that the welding purpose is achieved. Chinese patent No.: the structure provided by CN210607217U mainly solves the problems of uneven welding of the DBC plate and the copper bottom plate caused by uneven thickness of the welding layer between the DBC plate and the copper bottom plate.
However, the cooling base plate to pinfin or falt usually has a certain curvature in the actual welding process, and when placed in the welding fixture, the cooling base plate is easy to warp, and a gap exists, as shown with reference to fig. 3 and 4. When the bottom plate is cooled by heating pinfin or falt, the heating efficiency is low, and temperature difference exists at the two ends and the middle position of the cooling bottom plate, so that non-uniformity of heat is easily generated, and the welding quality is influenced.
The industry is faced with welding such cambered cooling plates by non-contact infrared heating or electromagnetic heating, but the equipment cost is relatively high or the transformation cost is relatively high.
Disclosure of Invention
In the summary section, a series of simplified form concepts are introduced that are all prior art simplifications in the section, which are described in further detail in the detailed description section. The summary of the utility model is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The technical problem to be solved by the utility model is to provide the IGBT module welding tool which can adapt to the radian of the cooling bottom of pinfin or falt, avoid uneven heating caused by temperature difference between the two ends and the middle position of the cooling bottom plate and improve the heat conduction efficiency.
In order to solve the technical problems, the IGBT module welding tool provided by the utility model comprises:
an upper cover, the bottom of which is provided with a plurality of feasible contact parts, and which can be covered on the top of the positioning part;
a positioning part, the top of which is provided with a plurality of first positioning structures and the bottom of which is provided with a plurality of second positioning structures;
a first positioning structure for positioning a contact position between the upper cover and the positioning portion;
a second positioning structure for positioning a contact position between the positioning portion and the welded product;
and the heat conduction part is provided with a third positioning structure at four corners at the top and an arc-shaped heat conduction plate inside.
Optionally, further improve IGBT module welding frock, still include:
and an armrest formed on the top of the upper cover.
Optionally, the IGBT module welding tool is further improved, and the feasible contact portion is a cushion pad or a cushion column made of soft metal.
Optionally, the IGBT module welding tool is further improved, the positioning portion is a positioning plate, and the first positioning structure and the second positioning structure are positioning columns.
Optionally, the IGBT module welding tool is further improved, the first positioning structures are formed at four corners of the positioning portion, and the second positioning structures are formed in a non-wiring area of the welded product.
Optionally, the IGBT module welding fixture is further improved, and the heat conduction portion includes:
a base formed as a hollow frame structure;
an arc-shaped heat conduction plate is covered and fixed at the hollow position of the base part.
Optionally, the welding fixture for the IGBT module is further improved, and the arc-shaped heat conduction plate is formed into an arc shape with high two sides and low middle.
Optionally, the IGBT module welding tool is further improved, and the arc radius range of the arc heat conduction plate is 1800-1900 mm.
Optionally, the IGBT module welding tool is further improved, and the arc heat conduction plate is formed with an embedded through hole array, and the through hole is used for the pin needle of the welded product to pass through.
Optionally, the IGBT module welding tool is further improved, the arc heat conduction plate is made of graphite material or aluminum alloy material, and the base is made of stainless steel material; the arc heat conduction plate is made of graphite or aluminum alloy materials and has good heat conductivity, and the base is made of stainless steel materials, so that the arc heat conduction plate can be prevented from being deformed too much after being heated, the strength is increased, and the arc heat conduction plate is good in corrosion resistance.
The working principle and the technical effect of the utility model are as follows:
1. the utility model designs the arc-shaped heat conduction plate into the arc shape with high two sides and low middle, so that the heat conduction plate is completely attached to the pinfin or falt cooling bottom plate, and the problems that the pinfin or falt cooling bottom plate is bent to a certain extent, is easy to tilt in the tool, is uneven and the like are solved.
2. The cooling bottom plate is completely attached, so that the occurrence of uneven heating is avoided, and the heat conduction efficiency of the heat conduction plate can be improved.
3. In a further optimization scheme of the utility model, the conduction bottom plate adopts an embedded through hole array structure, and aiming at the pinfin cooling bottom plate, the arc-shaped heat conduction plate adopts an embedded through hole array structure Pin needle to penetrate through holes, so that the heat conduction efficiency can be memorized and not improved.
4. After the heat transfer bottom plate of the tooling in the prior art is repeatedly heated and cooled for a long time, deformation or abrasion is easy to occur. In a further development of the utility model, the heat conducting part is designed as a groove from an arcuate heat conducting plate and a base part. The arc-shaped heat conduction plate is mainly used for conducting heat of the heating bottom plate to the bottom of a product and is used for heating and welding. The base is mainly used for fixing and heat conducting plates and preventing the heat conducting plates from deforming. The split design is adopted to solve the heating efficiency problem and the mechanical strength problem in the prior art. The material with high mechanical strength and corrosion resistance has low thermal conductivity, and the heating efficiency is not easy to improve. While materials with high thermal conductivity have insufficient mechanical strength and corrosion resistance. Therefore, the utility model adopts a split design, the arc-shaped heat conduction plate at the middle part is responsible for heat conduction, and the peripheral fixed base part is responsible for ensuring the mechanical strength of the tool and avoiding deformation or abrasion. And secondly, if the size of the pinfin changes, the fixture only needs to replace the heat conducting plate, so that the manufacturing cost is reduced.
Drawings
The accompanying drawings are intended to illustrate the general features of methods, structures and/or materials used in accordance with certain exemplary embodiments of the utility model, and supplement the description in this specification. The drawings of the present utility model, however, are schematic illustrations that are not to scale and, thus, may not be able to accurately reflect the precise structural or performance characteristics of any given embodiment, the present utility model should not be construed as limiting or restricting the scope of the numerical values or attributes encompassed by the exemplary embodiments according to the present utility model. The utility model is described in further detail below with reference to the attached drawings and detailed description:
fig. 1 is a schematic diagram of a prior art welding operation.
Fig. 2 is a second prior art welding operation.
Fig. 3 is a schematic view of the overall structure of the present utility model.
Fig. 4 is a schematic view of the structure of the heat conduction part of the present utility model.
Description of the reference numerals
Pinfin cooling base plate 1
Heating source 4
Viable contact 6.1
Positioning part 7
First positioning structure 7.1
Second positioning structure 7.2
Welded product 8
Third positioning structure 9.1
Arc-shaped heat conduction plate 9.2
A base 9.3.
Detailed Description
Other advantages and technical effects of the present utility model will become more fully apparent to those skilled in the art from the following disclosure, which is a detailed description of the present utility model given by way of specific examples. The utility model may be practiced or carried out in different embodiments, and details in this description may be applied from different points of view, without departing from the general inventive concept. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. The following exemplary embodiments of the present utility model may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be appreciated that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the technical solution of these exemplary embodiments to those skilled in the art. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Like reference numerals refer to like elements throughout the several views.
A first embodiment;
referring to fig. 3, the present utility model provides an IGBT module welding tool, including:
an upper cover 6, the bottom of which is formed with a plurality of viable contact parts 6.1, which can be covered on the top of the positioning part 7;
a positioning part 7, the top of which is provided with a plurality of first positioning structures 7.1, and the bottom of which is provided with a plurality of second positioning structures 7.2;
a first positioning structure 7.1 for positioning a contact position between the upper cover 6 and the positioning portion 7;
a second positioning structure 7.2 for positioning the contact position between the positioning portion 7 and the welded product 8;
the heat conduction part 9 has a third positioning structure 9.1 formed at four corners of the top thereof and an arc-shaped heat conduction plate 9.2 formed inside thereof.
Alternatively, the viable contacts 6.1 are cushioning pads or columns made of soft metal, preferably copper or gold.
Alternatively, the positioning portion 7 is a positioning plate, and the first positioning structure 7.1 and the second positioning structure 7.2 are positioning posts.
Alternatively, the first positioning structures 7.1 are formed at four corners of the positioning portion 7, and the second positioning structures 7.2 are formed at non-wiring regions of the welded product 8.
A second embodiment;
with continued reference to fig. 3, the present utility model provides an IGBT module welding tool, which is improved based on the first embodiment, and the same parts are not repeated, and further includes: an armrest 6.2 formed on top of the upper cover 6.
Alternatively, the upper cover 6 is preferably made of a lightweight material, such as plastic, for easy lifting.
A third embodiment;
referring to fig. 4, the present utility model provides a possible embodiment of a heat conduction portion 9 for the IGBT module welding tool of the first embodiment or the second embodiment, the heat conduction portion 9 includes:
a base 9.3 formed as a hollow frame structure;
an arc-shaped heat conduction plate 9.2 which is covered and fixed at the hollow position of the base part 9.3;
wherein, the arc heat conduction plate 9.2 is formed into an arc shape with high sides and low middle.
Alternatively, the arc radius of the arc-shaped heat conduction plate ranges from 1800mm to 1900mm.
Alternatively, the arc-shaped heat conduction plate 9.2 is formed with an embedded through hole array, and the through holes are used for the pin needles of the welded product to pass through.
A fourth embodiment;
the utility model provides an IGBT module welding tool, which is improved based on any one of the first embodiment to the third embodiment, and the same parts are not repeated, wherein the arc-shaped heat conduction plate is made of graphite materials or aluminum alloy materials, and the base part is made of stainless steel materials.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The present utility model has been described in detail by way of specific embodiments and examples, but these should not be construed as limiting the utility model. Many variations and modifications may be made by one skilled in the art without departing from the principles of the utility model, which is also considered to be within the scope of the utility model.
Claims (10)
1. IGBT module welding frock, its characterized in that includes:
an upper cover, the bottom of which is provided with a plurality of feasible contact parts, and which can be covered on the top of the positioning part;
a positioning part, the top of which is provided with a plurality of first positioning structures and the bottom of which is provided with a plurality of second positioning structures;
a first positioning structure for positioning a contact position between the upper cover and the positioning portion;
a second positioning structure for positioning a contact position between the positioning portion and the welded product;
and the heat conduction part is provided with a third positioning structure at four corners at the top and an arc-shaped heat conduction plate inside.
2. The IGBT module welding fixture of claim 1, further comprising:
and an armrest formed on the top of the upper cover.
3. The IGBT module welding fixture of claim 1 wherein: the viable contact is a bumper pad or post made of soft metal.
4. The IGBT module welding fixture of claim 1 wherein:
the positioning part is a positioning plate, and the first positioning structure and the second positioning structure are positioning columns.
5. The IGBT module welding fixture of claim 4 wherein:
the first positioning structures are formed at four corners of the positioning portion, and the second positioning structures are formed in non-wiring regions of the welded product.
6. The IGBT module welding fixture of claim 1 wherein the thermally conductive portion comprises:
a base formed as a hollow frame structure;
an arc-shaped heat conduction plate is covered and fixed at the hollow position of the base part.
7. The IGBT module welding fixture of claim 6 wherein: the arc-shaped heat conduction plate is formed into an arc shape with two high sides and a low middle.
8. The IGBT module welding fixture of claim 6 wherein: the arc radius range of the arc heat conduction plate is 1800mm-1900mm.
9. The IGBT module welding fixture of claim 6 wherein: an embedded through hole array is formed on the arc-shaped heat conduction plate, and pin needles of welded products pass through the through holes.
10. The IGBT module welding fixture of any one of claims 1 to 9, wherein: the arc-shaped heat conduction plate is made of graphite materials or aluminum alloy materials, and the base is made of stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222616380.4U CN218918798U (en) | 2022-09-30 | 2022-09-30 | IGBT module welding fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222616380.4U CN218918798U (en) | 2022-09-30 | 2022-09-30 | IGBT module welding fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218918798U true CN218918798U (en) | 2023-04-25 |
Family
ID=86046390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222616380.4U Active CN218918798U (en) | 2022-09-30 | 2022-09-30 | IGBT module welding fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218918798U (en) |
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2022
- 2022-09-30 CN CN202222616380.4U patent/CN218918798U/en active Active
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