Welding tool for power module
By designing welding tools for power modules, problems such as welding position drift and material adhesion during welding are solved, and the independence and high yield of each component are achieved.
Patent Information
- Application Number
- CN202420932442.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-29
AI Technical Summary
During the welding process, existing power modules have solder position drift, material adhesion, solder tin creeping, etc., resulting in a low product yield.
A welding tool for power modules is designed, including a first limiting plate, a second limiting plate and a third limiting plate, which are respectively used to install electronic components, signal pins, circuit boards and liners, and are arranged in sequence in the thickness direction, realizing the independence of each component in the welding process.
Through this welding tooling, the independence of the lining board, circuit board, electronic components and signal pins in the welding process is ensured, problems such as welding position drift and material adhesion are avoided, and product yield is improved.
Smart Images
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Abstract
Description
Technical Field
[0001] The present application relates to the field of welding, and in particular to a welding tool for a power module. Background Art
[0002] In the related technology, welding is one of the important processes that affect the production quality and product performance of power modules. The quality of welding is directly related to the stability of the power module process, the effective control of process quality and the high-performance output of product parameters. However, the existing power modules have welding position drift, material adhesion, solder creeping and other phenomena during the welding process, which leads to the problem of low product yield. Utility Model Content
[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a welding tool for a power module, which can achieve the independence of a liner, a circuit board, an electronic component and a signal pin during the welding process, optimize the process flow and improve the yield rate of welding products.
[0004] According to the embodiment of the present application, the welding tool for the power module includes: a first limiting plate, a first limiting portion and a second limiting portion are formed on the first limiting plate, the first limiting portion is suitable for installing electronic components, and the second limiting portion is suitable for installing signal pins; a second limiting plate, the second limiting plate is connected to the first limiting plate, a third limiting portion is formed on the second limiting plate, and the third limiting portion is suitable for installing a circuit board; a third limiting plate, the third limiting plate is connected to the first limiting plate, a fourth limiting portion is formed on the third limiting plate, and the fourth limiting portion is suitable for installing a lining plate; wherein the first limiting plate, the second limiting plate and the third limiting plate are arranged sequentially in the thickness direction.
[0005] According to the welding tool for power module of the embodiment of the present application, the welding tool is provided with a first limit plate, a second limit plate and a third limit plate. The first limit plate can be used to install electronic components and signal pins, the second limit plate can be used to install circuit boards, and the third limit plate can be used to install lining plates. The first limit plate, the second limit plate and the third limit plate are arranged sequentially in the thickness direction, thereby realizing the independence of the lining plate, circuit boards, electronic components and signal pins in the welding process and improving the product yield.
[0006] In some embodiments of the present application, the thickness of the first limiting plate is greater than the thickness of the second limiting plate and / or the third limiting plate.
[0007] In some embodiments of the present application, the first limiting portion and the second limiting portion are respectively constructed to be a plurality of portions spaced apart in the width direction of the first limiting plate.
[0008] In some embodiments of the present application, the third limiting portion is configured to be a plurality of portions spaced apart in the width direction, and a projection of the third limiting portion in the thickness direction does not overlap with projections of the first limiting portion and the second limiting portion.
[0009] In some embodiments of the present application, a first avoidance hole and a second avoidance hole are formed on the second limit plate and are respectively arranged opposite to the first limit portion and the second limit portion.
[0010] In some embodiments of the present application, the third limiting plate is formed with a through hole extending through the thickness direction and a partition extending in the width direction, and the partition is suitable for dividing the through hole into a plurality of fourth limiting portions; a plurality of limiting protrusions extending inward are formed on the periphery of the fourth limiting portion.
[0011] In some embodiments of the present application, the first limiting plate, the second limiting plate and the third limiting plate are arranged opposite to each other in the thickness direction.
[0012] In some embodiments of the present application, the outer peripheral wall of the first limiting plate is formed with a protrusion extending away from the first limiting plate in the circumferential direction, and the protrusion is formed with a limiting column extending in the thickness direction, and the second limiting plate and the third limiting plate are respectively formed with limiting holes that cooperate with the limiting column.
[0013] In some embodiments of the present application, the protrusion is configured as a plurality of protrusions spaced apart on the outer peripheral wall of the first limiting plate.
[0014] In some embodiments of the present application, a positioning column extending toward the second limiting plate is further formed on the protrusion, and a positioning hole cooperating with the positioning column is formed on the second limiting plate.
[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0017] Figure 1 is a structural schematic diagram of a welding tool for a power module according to an embodiment of the present application;
[0018] Figure 2 yes Figure 1 Exploded diagram of the welding tooling;
[0019] Figure 3 yes Figure 2A schematic side view of the first limiting plate;
[0020] Figure 4 yes Figure 3 A top view schematic diagram of
[0021] Figure 5 yes Figure 2 A schematic diagram of the structure of the second limiting plate;
[0022] Figure 6 yes Figure 2 Schematic diagram of the structure of the third limiting plate.
[0023] Reference numerals:
[0024] 10. Welding tooling;
[0025] 11. first limiting plate; 111. first limiting portion; 112. second limiting portion; 113. convex portion; 114. limiting column; 115. positioning column;
[0026] 12. second limiting plate; 121. third limiting portion; 122. first avoidance hole; 123. second avoidance hole; 124. limiting hole;
[0027] 13. Third limiting plate; 131. Fourth limiting portion; 132. Through hole; 133. Partitioning portion; 134. Limiting protrusion. DETAILED DESCRIPTION
[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0029] Reference below Figure 1-Figure 6 A welding tool 10 for a power module according to an embodiment of the present application is described, wherein the welding tool 10 includes a first limiting plate 11, a second limiting plate 12 and a third limiting plate 13, wherein a first limiting portion 111 and a second limiting portion 112 are formed on the first limiting plate 11, wherein the first limiting portion 111 is suitable for installing electronic components, and the second limiting portion 112 is suitable for installing signal pins, wherein the second limiting plate 12 is connected to the first limiting plate 11, wherein a third limiting portion 121 is formed on the second limiting plate 12, wherein the third limiting portion 121 is suitable for installing a circuit board, wherein the third limiting plate 13 is connected to the first limiting plate 11, wherein a fourth limiting portion 131 is formed on the third limiting plate 13, wherein the fourth limiting portion 131 is suitable for installing a lining plate, wherein the first limiting plate 11, the second limiting plate 12 and the third limiting plate 13 are arranged sequentially in the thickness direction.
[0030] At present, welding is one of the important processes that affects the production quality and product performance of power modules. The quality of welding is directly related to the stability of the power module process, the effective control of process quality and the high-performance output of product parameters. However, the existing power modules have welding position drift, material adhesion, solder creeping and other phenomena during the welding process, which leads to the problem of low product yield.
[0031] like Figure 1 and Figure 2 As shown, specifically, a first limiting portion 111 and a second limiting portion 112 may be formed on the first limiting plate 11, the first limiting portion 111 and the second limiting portion 112 may be arranged through the thickness direction of the first limiting plate 11, and the first limiting portion 111 may be used to install electronic components, wherein the electronic components may be NTC (thermistor) and the like, the second limiting portion 112 may be used to install signal pins, the second limiting plate 12 may be arranged at the bottom end of the first limiting plate 11, and the second limiting plate 12 may be connected to the first limiting plate 11, a third limiting portion 121 may be formed on the second limiting plate 12, the third limiting portion 121 may be used to install a circuit board, wherein the circuit board may be an IMS board (special DBC current loop lining board), the IMS board is an important welding material, and has a more obvious effect on the conductivity, heat generation and process parameter performance of the power module.
[0032] The third limiting plate 13 can be arranged at the bottom end of the second limiting plate 12, and the third limiting plate 13 can be connected to the first limiting plate 11. A fourth limiting portion 131 can be formed on the third limiting plate 13, and the fourth limiting portion 131 can be used to install a lining plate. The lining plate is a large-area welding material of a copper, ceramic, and copper composite structure. The upper end of the lining plate is mainly connected to electronic components such as chips and resistors, carries the electrical transmission of the module, and controls the conduction of the circuit. The lower end of the lining plate is connected to the heat dissipation substrate and the radiator, which is responsible for the transfer and extraction of heat from the module, and is used to reduce the risk of overheating failure of chips and components. Furthermore, the first limit plate 11, the second limit plate 12 and the third limit plate 13 are arranged in sequence in the thickness direction. During actual welding, the staff can first place the third limit plate 13 on the substrate, and then install the lining plate on the fourth limit part 131, fix the lining plate to the substrate by welding, and after the lining plate welding is completed, place the second limit plate 12 on the third limit plate 13, install the circuit board on the third limit part 121, and weld the circuit board from the bottom end of the substrate. After the circuit board welding is completed, place the first limit plate 11 on the second limit plate 12, and then install the electronic components and signal pins on the first limit part 111 and the second limit part 112 respectively, and weld the electronic components and signal pins from the bottom end of the substrate, thereby completing the welding process of the power module. The welding tool 10 can ensure the independence of the lining plate, circuit board, electronic components and signal pins in the welding process, thereby improving the product yield.
[0033] In short, the welding tool 10 for the power module of the present application is provided with a first limit plate 11, a second limit plate 12 and a third limit plate 13. The first limit plate 11 can be used to install electronic components and signal pins, the second limit plate 12 can be used to install circuit boards, and the third limit plate 13 can be used to install lining plates. The first limit plate 11, the second limit plate 12 and the third limit plate 13 are arranged sequentially in the thickness direction, thereby realizing the independence of the lining plate, circuit board, electronic components and signal pins in the welding process and improving the product yield.
[0034] like Figure 1 and Figure 2 As shown, in some embodiments of the present application, the thickness of the first limiting plate 11 is greater than the thickness of the second limiting plate 12 and the third limiting plate 13, or the thickness of the first limiting plate 11 is greater than the thickness of the second limiting plate 12 and the third limiting plate 13 at the same time. The first limiting plate 11 is used to install electronic components and signal pins. Since the welding contact area of electronic components and signal pins is small and the welding stability requirement is high, the depth of the first limiting portion 111 and the second limiting portion 112 is increased by increasing the thickness of the first limiting plate 11, thereby ensuring the limiting strength of the tooling.
[0035] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, the first limiting portion 111 and the second limiting portion 112 are respectively constructed as a plurality of spaced apart arrangements in the width direction of the first limiting plate 11. By providing a plurality of first limiting portions 111 and a plurality of second limiting portions 112, the installation of a plurality of electronic components and a plurality of signal pins can be achieved. In a specific embodiment, the first limiting portion 111 is constructed as two and spaced apart arrangements in the width direction, and the second limiting portion 112 is constructed as two and spaced apart arrangements in the width direction, but is not limited thereto. The specific arrangement positions and spacing distances of the plurality of first limiting portions 111 and the plurality of second limiting portions 112 can be set according to actual needs. The third limiting portion 121 can be constructed as a plurality of portions, and the plurality of third limiting portions 121 can be spaced apart arrangements in the width direction, wherein in the thickness direction, the projections of the plurality of third limiting portions 121 do not overlap with the projections of the plurality of first limiting portions 111 and the plurality of second limiting portions 112, thereby ensuring that the installation of the electronic components and the signal pins is not affected during the installation of the circuit board.
[0036] like Figure 5As shown, in some embodiments of the present application, a first avoidance hole 122 and a second avoidance hole 123 are further formed on the second limiting plate 12. The first avoidance hole 122 can be arranged opposite to the first limiting portion 111, and the second avoidance hole 123 can be arranged opposite to the second limiting portion 112. The first avoidance hole 122 and the second avoidance hole 123 can ensure that the electronic components and the signal needles are effectively welded on the lining plate. During actual welding, after the circuit board welding is completed, the first limiting plate 11 is placed on the second limiting plate 12, and then the electronic components and the signal needles are respectively installed on the first limiting portion 111 and the second limiting portion 112. The electronic components and the signal needles respectively pass through the first avoidance hole 122 and the second avoidance hole 123 to connect one end to the lining plate, thereby realizing the welding of the electronic components and the signal needles.
[0037] like Figure 6 As shown, in some embodiments of the present application, a through hole 132 and a partition 133 are formed on the third limiting plate 13. The through hole 132 can be set through in the thickness direction, and the through hole 132 can ensure that the lining plate can be welded and fixed to the substrate. The partition 133 can be extended in the width direction. The partition 133 can be configured as multiple, and multiple partitions 133 can separate the through hole 132 into multiple fourth limiting parts 131, so as to achieve welding of multiple linings, ensure a safe distance during welding, and avoid undesirable phenomena such as solder creeping out, solder overflow, and lining welding adhesion. In a specific embodiment, the partition 133 can be configured as two, and the fourth limiting part 131 can be configured as three, but it is not limited thereto. The number of the fourth limiting parts 131 can be set according to actual needs.
[0038] Furthermore, a plurality of limiting protrusions 134 are formed on the outer periphery of the fourth limiting portion 131. The plurality of limiting protrusions 134 can be extended inwardly. The limiting protrusions 134 can assist in fixing the liner to prevent the material from sticking to the tooling when the liner is demoulded.
[0039] like Figure 1 As shown, in some embodiments of the present application, the first limiting plate 11, the second limiting plate 12 and the third limiting plate 13 are arranged opposite to each other in the thickness direction, ensuring that the welding tool 10 can be used sequentially according to the welding process.
[0040] like Figure 3 and Figure 4As shown, in some embodiments of the present application, a protrusion 113 is formed on the outer peripheral wall of the first limiting plate 11, and the protrusion 113 can be extended in the circumferential direction away from the first limiting plate 11, and a limiting column 114 extending in the thickness direction can be formed on the protrusion 113, and limiting holes 124 cooperating with the limiting column 114 are respectively formed on the second limiting plate 12 and the third limiting plate 13. By cooperating with the limiting column 114 and the limiting hole 124, it can be ensured that during the welding process, no relative movement is found between the first limiting plate 11, the second limiting plate 12 and the third limiting plate 13, thereby improving the welding yield.
[0041] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, a plurality of protrusions 113 can be constructed, and the plurality of protrusions 113 can be arranged at intervals on the outer peripheral wall of the first limiting plate 11. By providing a plurality of protrusions 113, the matching effect between the limiting column 114 and the limiting hole 124 can be improved, thereby ensuring the stability of the matching between the first limiting plate 11, the second limiting plate 12 and the third limiting plate 13.
[0042] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, a positioning column 115 extending toward the second limiting plate 12 is also formed on the protrusion 113, and a positioning hole cooperating with the positioning column 115 is formed on the second limiting plate 12. By cooperating the positioning column 115 with the positioning hole, it can be ensured that the first limiting plate 11 can be installed on the second limiting plate 12, and the length of the positioning column 115 is less than the length of the limiting column 114. The positioning column 115 can play an anti-mistake effect, effectively avoiding assembly errors of the welding tool 10, and improving the installation efficiency of the staff when installing the first limiting portion 111. The use of the limiting column 114 and the positioning column 115 can avoid the stress concentration phenomenon caused by the assembly of the welding tool 10, and also achieve consistency and stability of the welding process.
[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0044] In the description of this application, "first feature" or "second feature" may include one or more of the features.
[0045] In the description of the present application, “plurality” means two or more.
[0046] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.
[0047] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0049] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A welding tool for a power module, characterized in that: include: A first limiting plate, wherein a first limiting portion and a second limiting portion are formed on the first limiting plate, wherein the first limiting portion is suitable for installing electronic components, and the second limiting portion is suitable for installing signal pins; a second limiting plate, the second limiting plate being connected to the first limiting plate, a third limiting portion being formed on the second limiting plate, and the third limiting portion being suitable for mounting a circuit board; A third limiting plate, the third limiting plate is connected to the first limiting plate, a fourth limiting portion is formed on the third limiting plate, and the fourth limiting portion is suitable for installing a lining plate; in The first limiting plate, the second limiting plate and the third limiting plate are arranged in sequence in the thickness direction.
2. The welding tool for power module according to claim 1, characterized in that: The thickness of the first limiting plate is greater than the thickness of the second limiting plate and / or the third limiting plate.
3. The welding tool for power module according to claim 2, characterized in that: The first limiting portion and the second limiting portion are respectively configured to be a plurality of portions spaced apart in the width direction of the first limiting plate.
4. The welding tool for power module according to claim 3, characterized in that: The third limiting portion is configured to be a plurality of portions spaced apart in the width direction, and a projection of the third limiting portion in the thickness direction does not overlap with projections of the first limiting portion and the second limiting portion.
5. The welding tool for power module according to claim 4, characterized in that: The second limiting plate is further formed with a first avoidance hole and a second avoidance hole which are respectively arranged opposite to the first limiting portion and the second limiting portion.
6. The welding tool for power module according to claim 5, characterized in that: The third limiting plate is formed with a through hole penetrating in the thickness direction and a partition extending in the width direction, wherein the partition is suitable for dividing the through hole into a plurality of fourth limiting portions; A plurality of limiting protrusions extending inwardly are formed on the outer periphery of the fourth limiting portion.
7. The welding tool for power module according to any one of claims 1 to 6, characterized in that: The first limiting plate, the second limiting plate and the third limiting plate are arranged opposite to each other in the thickness direction.
8. The welding tool for power module according to claim 1, characterized in that: The outer peripheral wall of the first limiting plate is formed with a convex portion extending away from the first limiting plate in the circumferential direction, and the convex portion is formed with a limiting column extending in the thickness direction, and the second limiting plate and the third limiting plate are respectively formed with limiting holes that cooperate with the limiting column.
9. The welding tool for power module according to claim 8, characterized in that: The convex portion is configured to be a plurality of convex portions that are spaced apart from each other on the outer peripheral wall of the first limiting plate.
10. The welding tool for power module according to claim 9, characterized in that: The convex portion is also provided with a positioning column extending toward the second limiting plate, and the second limiting plate is provided with a positioning hole matched with the positioning column.