Tool jig of power module

Abstract

The utility model belongs to the technical field of tooling jigs, and discloses a tooling jig of a power module, which comprises a substrate, a first concave part, a second concave part, a first connecting part, a second connecting part and a third connecting part, and is characterized in that the upper end surface of the substrate is concave inwards to form the first concave part; the cover plate is rotationally connected with the substrate, the lower end face of the cover plate is concaved inwards to form a second concave part, an opening penetrating through the cover plate is formed in the bottom of the second concave part, when the cover plate rotates towards the substrate, the upper end face of the substrate abuts against the lower end face of the cover plate, the first concave part and the second concave part form a containing cavity, and the power module is contained in the containing cavity; and the power module is partially exposed out of the opening. According to the utility model, the cover plate is rotatably connected with the substrate, when the cover plate rotates towards the substrate, the upper end surface of the substrate abuts against the lower end surface of the cover plate, and the first concave part and the second concave part form the accommodating cavity, so that the power module is accommodated in the accommodating cavity, and the part of the power module, which can be in contact with water, is exposed outside the opening; product function failure caused by water entering all the power modules is avoided while ultrasonic detection is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling and fixtures, and relates to a tooling and fixture for a power module. Background Art

[0002] As the core device of electric vehicle inverter, the performance parameters of power module directly determine the performance and reliability of electric vehicle. The welding quality of ceramic substrate, chip and heat sink of power module has an important influence on the heat dissipation performance and reliability of power module. Therefore, in the process of power module packaging, in order to keep the welding void rate of power module within a relatively stable range, we need to use XRAY equipment to conduct 100% inspection on power module in production to screen out power modules with excessive voids. However, after the power cycle test of power module, since the frame and signal terminals of power module have been installed, XRAY equipment can no longer perform void inspection on power module. At this time, we can only use C-Sam equipment to inspect power module. Ultrasonic inspection of C-Sam equipment needs to use deionized water as the medium to scan. It is necessary to place all power modules in deionized water for inspection. However, only the heat sink of power module can contact water. After the power module is placed in water as a whole, it will cause the power module to fail and cannot be used.

[0003] Based on this, the art urgently needs a tooling fixture for a power module to solve the above technical problems. Utility Model Content

[0004] In view of this, the purpose of the present invention is to solve the above problems and provide a tooling fixture for a power module.

[0005] In order to solve the above technical problems, the utility model provides a tooling fixture for a power module, comprising:

[0006] A substrate, wherein the upper end surface of the substrate is concave to form a first recessed portion, and the first recessed portion is used to accommodate the power module;

[0007] The cover plate is rotatably connected to the substrate, the lower end surface of the cover plate is concave to form a second recessed portion, and an opening penetrating the cover plate is provided at the bottom of the second recessed portion. When the cover plate is rotated toward the substrate, the upper end surface of the substrate abuts against the lower end surface of the cover plate, and the first recessed portion and the second recessed portion form a receiving cavity, the power module is received in the receiving cavity, and the power module is partially exposed outside the opening.

[0008] As a further improvement of the present invention, when the upper end surface of the substrate abuts against the lower end surface of the cover plate, the orthographic projection of the second recessed portion on the first recessed portion covers the first recessed portion.

[0009] As a further improvement of the present invention, a first sealing member is provided around the edge of the upper end surface of the substrate, and when the cover plate rotates toward the substrate, the upper end surface of the substrate abuts against the lower end surface of the cover plate through the first sealing member.

[0010] As a further improvement of the present invention, a second sealing member is provided at the bottom of the second recessed portion, and the second sealing member is arranged around the opening.

[0011] As a further improvement of the present invention, a positioning hole is provided on the peripheral side of the first recessed portion, a positioning piece is provided in the positioning hole, and the positioning piece cooperates with the positioning hole to fix the power module.

[0012] As a further improvement of the present invention, a hinge is spaced apart on one side of the upper end surface of the base plate, and the base plate is rotatably connected to the cover plate via the hinge.

[0013] As a further improvement of the present invention, locking pieces are arranged at intervals on the side walls of the base plate, and the locking pieces are detachably connected to the cover plate.

[0014] As a further improvement of the present invention, the number of the first recessed portions is four, the four first recessed portions are arranged in an array, and the number of the second recessed portions is set corresponding to the number of the first recessed portions.

[0015] As a further improvement of the present invention, the base plate and the cover plate are made of aluminum alloy, and the positioning piece is made of plastic.

[0016] As a further improvement of the present invention, the locking piece is a spring buckle.

[0017] The technical effect of the utility model is as follows: compared with the prior art, the utility model provides a tooling fixture for a power module, which is rotatably connected with a substrate by setting a cover plate, a first recessed portion is set on the upper end surface of the substrate, and two recessed portions are set on the lower end surface of the cover plate. When the cover plate rotates toward the substrate and the upper end surface of the substrate abuts against the lower end surface of the cover plate, the first recessed portion and the second recessed portion form an accommodating cavity, so that the power module can be accommodated in the accommodating cavity, and an opening penetrating the cover plate is provided at the bottom of the second recessed portion, so that the part of the power module that can contact with water can be exposed outside the opening, thereby realizing ultrasonic detection while avoiding the power module from being completely in contact with water, causing product function failure, and solving the problem in the prior art that when the C-Sam device detects the power module, the power module is completely placed in deionized water, causing function failure and inability to continue to be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the utility model, rather than all of the embodiments. For ordinary technicians in this field, without paying creative work, other drawings obtained based on these drawings all fall within the scope of protection of the utility model.

[0019] Figure 1 It is a three-dimensional diagram of a tooling fixture for a power module provided by an embodiment of the utility model;

[0020] Figure 2 This is a three-dimensional diagram of a substrate in a tooling fixture of a power module provided by an embodiment of the utility model;

[0021] Figure 3 This is a three-dimensional diagram of a cover plate in a tooling fixture for a power module provided by an embodiment of the utility model;

[0022] Figure 4 It is a front view of a tooling fixture for a power module provided by an embodiment of the utility model;

[0023] Figure 5 yes Figure 4 Section view at AA.

[0024] Among them, 10 is a substrate, 11 is a first recessed portion, 111 is a positioning hole, 112 is a positioning member, 12 is a first sealing member, 13 is a hinge, 14 is a locking member, 15 is a clamping member, 20 is a cover plate, 21 is a second recessed portion, 22 is an opening, 23 is a second sealing member, 30 is a accommodating cavity, and 40 is a power module. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] In order to make the description of the disclosed content more detailed and complete, the following is an illustrative description of the implementation method and specific examples of the utility model; however, this is not the only form of implementing or using the specific examples of the utility model. The implementation method covers the features of multiple specific examples and the method steps and their sequence for constructing and operating these specific examples. However, other specific examples can also be used to achieve the same or equal functions and step sequences. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0029] In the description of the present invention, the terms "front", "rear", "top", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] Please refer to Figure 1-Figure 5 An embodiment of the utility model provides a tooling fixture for a power module, which is used to solve the problem that the power module is completely placed in water, resulting in functional failure and inability to continue to be used.

[0031] For details, please refer to Figure 1 A three-dimensional diagram of a tooling fixture for a power module provided by an embodiment of the utility model. The utility model provides a tooling fixture for a power module, including: a substrate 10 and a cover plate 20 rotatably connected to the substrate 10; see Figure 2-3 The upper end surface of the substrate 10 is concave to form a first concave portion 11, and the lower end surface of the cover plate 20 is concave to form a second concave portion 21. When the cover plate 20 rotates toward the substrate 10, the upper end surface of the substrate 10 abuts against the lower end surface of the cover plate 20, and the first concave portion 11 and the second concave portion 21 form a receiving cavity 30. The power module 40 is received in the receiving cavity 30. When the power module 40 is ultrasonically tested using C-Sam (ultrasonic scanning) equipment, the tooling fixture for receiving the power module is placed in deionized water for testing, so as to avoid contact between the power module 40 and water, and avoid functional failure of the power module 40, which causes the problem of being unable to continue to be used;

[0032] In the embodiment of the utility model, the shape and size of the first recessed portion 11 formed by the inward concave upper end surface of the substrate 10 are set accordingly according to the size and shape of the power module 40. Preferably, the shape of the first recessed portion 11 is rectangular. Similarly, the shape and size of the second recessed portion 21 formed by the inward concave lower end surface of the cover plate 20 rotatably connected to the substrate 10 are also set accordingly according to the size and shape of the power module 40. As long as the upper end surface of the substrate 10 abuts against the lower end surface of the cover plate 20, a accommodating cavity 30 can be formed between the first recessed portion 11 and the second recessed portion 21 to prevent the power module 40 in the accommodating cavity 30 from contacting water. Preferably, the shape of the first recessed portion 11 is rectangular, and the second recessed portion 21 is also rectangular corresponding to the first recessed portion 11. At the same time, according to the PIN height of the power module 40 of 25 mm, the recessed depth of the first recessed portion 11 is 30 mm, ensuring that the PIN pins on the back of the power module 40 will not be damaged when the power module 40 is accommodated in the accommodating cavity 30.

[0033] Furthermore, an opening 22 penetrating the cover plate 20 is provided at the bottom of the second recessed portion 21 , and the part of the power module 40 to be inspected that can be in contact with water can be exposed outside the opening 22 through the opening 22 , so as to facilitate ultrasonic inspection of the power module 40 by the C-Sam device.

[0034] In the embodiment of the utility model, the shape and size of the opening 22 are set accordingly according to the size and shape of the part of the power module 40 that can contact with water. Preferably, according to the size of the part of the power module 40 that can contact with water 135*60mm, the opening 22 is set to a rectangle of 145*70mm to ensure that the power module 40 is isolated from water except for the part that can contact with water.

[0035] The utility model provides a tooling fixture for a power module, which is rotatably connected with a substrate 10 by setting a cover plate 20, a first recessed portion 11 is set on the upper end surface of the substrate 10, and two recessed portions are set on the lower end surface of the cover plate 20. When the cover plate 20 rotates toward the substrate 10 and the upper end surface of the substrate 10 abuts against the lower end surface of the cover plate 20, the first recessed portion 11 and the second recessed portion 21 form a receiving cavity 30, so that the power module 40 can be accommodated in the receiving cavity 30, and an opening 22 penetrating the cover plate 20 is provided at the bottom of the second recessed portion 21, so that the part of the power module 40 that can contact with water can be exposed outside the opening 22, so that ultrasonic detection is realized while avoiding the power module 40 from being completely in contact with water, resulting in product function failure, and solving the problem in the prior art that when the C-Sam device detects the power module 40, the power module 40 is completely placed in deionized water, resulting in function failure and inability to continue to be used.

[0036] As a further improvement of the present invention, see Figure 4-5 When the upper end surface of the substrate 10 abuts against the lower end surface of the cover plate 20, the orthographic projection of the second recessed portion 21 on the first recessed portion 11 covers the first recessed portion 11. By setting the orthographic projection of the second recessed portion 21 on the first recessed portion 11 to cover the first recessed portion 11, the accommodation cavity 30 formed by the first recessed portion 11 and the second recessed portion 21 forms a seal on the power module 40, thereby preventing the power module 40 from being damaged by contact with water. At the same time, the portion of the second recessed portion 21 extending out of the first recessed portion 11 and the accommodation cavity 30 formed by the upper end surface of the substrate 10 can be used to accommodate the protruding terminals on the peripheral side of the power module 40, further ensuring the sealing of the power module 40 and improving the reliability of the tooling and fixture.

[0037] As a further improvement of the present invention, a first seal 12 is provided on the edge ring of the upper end surface of the substrate 10. When the cover plate 20 rotates toward the substrate 10, the upper end surface of the substrate 10 abuts against the lower end surface of the cover plate 20 through the first seal 12. By providing the first seal 12 on the edge ring of the upper end surface of the substrate 10, when the cover plate 20 rotates toward the substrate 10, the upper end surface of the substrate 10 abuts against the lower end surface of the cover plate 20 through the first seal 12, thereby further improving the tightness between the upper end surface of the substrate 10 and the lower end surface of the cover plate 20, ensuring the sealing of the accommodating cavity 30 formed by the first recessed portion 11 and the second recessed portion 21, improving the sealing performance of the tooling fixture, and ensuring that only the water-contactable portion of the power module 40 contacts water through the opening 22.

[0038] As a further improvement of the present invention, a second sealing member 23 is provided at the bottom of the second recessed portion 21, and the second sealing member 23 is arranged around the opening 22. By providing the second sealing member 23 at the bottom of the second recessed portion 21 and arranging the second sealing member 23 around the opening 22, the power module 40 is abutted against the bottom of the second recessed portion 21 through the second sealing member 23, thereby preventing water from penetrating into the interior of the power module 40 from the gap between the opening 22 and the power module 40, thereby damaging the power module 40.

[0039] As a further improvement of the present utility model, a positioning hole 111 is provided on the periphery of the first recessed portion 11, and a positioning piece 112 is provided in the positioning hole 111. The positioning piece 112 cooperates with the positioning hole 111 to fix the power module 40. By providing the positioning hole 111 on the periphery of the first recessed portion 11 and providing the positioning piece 112 in the positioning hole 111, the positioning piece 112 can cooperate with the power module 40 to fix the power module 40 between the positioning piece 112 and the positioning hole 111, thereby fixing the power module 40. Preferably, the positioning piece 112 is made of high temperature resistant thermoplastic plastic to prevent the plating of the power module 40 from being worn during the positioning and taking process of the power module 40.

[0040] As a further improvement of the present invention, hinges 13 are arranged at intervals on one side of the upper end surface of the substrate 10, and the substrate 10 is rotatably connected to the cover plate 20 through the hinges 13. By arranging hinges 13 at intervals on one side of the upper end surface of the substrate 10, the substrate 10 and the cover plate 20 can be rotatably connected through the hinges 13, and the accommodating cavity 30 can be opened and closed by rotating the substrate 10 or the cover plate 20, so as to facilitate the placement and removal of the power module 40. Preferably, the maximum opening angle of the hinge 13 is 180°, so as to ensure that there is enough space when placing and removing the power module 40, and avoid touching the power module 40 during the placement and removal process.

[0041] As a further improvement of the present invention, locking pieces 14 are arranged at intervals on the side walls of the substrate 10, and the locking pieces 14 are detachably connected to the cover plate 20. By arranging locking pieces 14 at intervals on the side walls of the substrate 10 and detachably connecting the cover plate 20 through the locking pieces 14, the tightness of the connection between the substrate 10 and the cover plate 20 is ensured. Preferably, the locking pieces 14 are spring buckles, and the spring pressure of the spring buckle is not less than 5kg, thereby ensuring the sealing of the substrate 10 and the cover plate 20 after closing.

[0042] As a further improvement of the present invention, the number of the first recessed parts 11 is four, the four first recessed parts 11 are arranged in an array, and the number of the second recessed parts 21 is set corresponding to the number of the first recessed parts 11. By having the number of the first recessed parts 11 being four, the four first recessed parts 11 being arranged in an array, and the number of the second recessed parts 21 being set corresponding to the number of the first recessed parts 11, four first recessed parts 11 corresponding to four second recessed parts 21 form four accommodating cavities 30, it is possible to assemble four power modules 40 with one fixture, shorten the clamping time, and improve the detection efficiency. In practical applications, the number of the first recessed parts 11 can be specifically set according to the actual situation, and the present invention embodiment will not elaborate on this.

[0043] As a further improvement of the present invention, the substrate 10 and the cover plate 20 are made of aluminum alloy, and the positioning member 112 is made of plastic. By setting the substrate 10 and the cover plate 20 to be made of aluminum alloy, the tooling fixture can be prevented from rusting after being used in water for a long time. At the same time, the aluminum alloy is light in weight and convenient to take and place. By setting the positioning member 112 to be made of plastic, the plating layer of the power module 40 can be prevented from being worn during the positioning and taking process of the power module 40.

[0044] As a further improvement of the present invention, the side wall of the substrate 10 is further provided with a gripping member 15, through which the gripping member 15 can cooperate with the automatic gripper to realize automatic picking up of the tooling fixture, thereby avoiding fatigue of workers caused by long-time manual picking up and affecting the detection efficiency.

[0045] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A tooling fixture for a power module, characterized in that: include: A substrate, wherein the upper end surface of the substrate is concave to form a first recessed portion, and the first recessed portion is used to accommodate the power module; The cover plate is rotatably connected to the substrate, the lower end surface of the cover plate is concave to form a second recessed portion, and an opening penetrating the cover plate is provided at the bottom of the second recessed portion. When the cover plate is rotated toward the substrate, the upper end surface of the substrate abuts against the lower end surface of the cover plate, and the first recessed portion and the second recessed portion form a receiving cavity, the power module is received in the receiving cavity, and the power module is partially exposed outside the opening.

2. The tooling fixture for the power module according to claim 1, characterized in that: When the upper end surface of the substrate abuts against the lower end surface of the cover plate, the orthographic projection of the second recessed portion on the first recessed portion covers the first recessed portion.

3. The tooling fixture for the power module according to claim 1, characterized in that: A first sealing member is disposed around the edge of the upper end surface of the substrate. When the cover plate rotates toward the substrate, the upper end surface of the substrate abuts against the lower end surface of the cover plate through the first sealing member.

4. The tooling fixture for the power module according to claim 1, characterized in that: A second sealing member is disposed at the bottom of the second recessed portion, and the second sealing member is disposed around the opening.

5. The tooling fixture for the power module according to claim 1, characterized in that: A positioning hole is provided on the periphery of the first recessed portion, a positioning piece is provided in the positioning hole, and the positioning piece cooperates with the positioning hole to fix the power module.

6. The tooling fixture for the power module according to claim 1, characterized in that: A hinge is arranged at intervals on one side of the upper end surface of the base plate, and the base plate is rotatably connected to the cover plate through the hinge.

7. The tooling fixture for the power module according to claim 1, characterized in that: The side walls of the base plate are spaced apart with locking pieces, and the locking pieces are detachably connected to the cover plate.

8. The tooling fixture for the power module according to claim 1, characterized in that: The number of the first recessed portions is four, and the four first recessed portions are arranged in an array. The number of the second recessed portions is set corresponding to the number of the first recessed portions.

9. The tooling fixture for the power module according to claim 5, characterized in that: The substrate and the cover are made of aluminum alloy, and the positioning piece is made of plastic.

10. The tooling fixture for the power module according to claim 7, characterized in that: The locking piece is a spring buckle.

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