Signal terminal location degree inspection jig for power module

Abstract

The utility model discloses a signal terminal position accuracy inspection jig for a power module, which comprises a non-metal insulation detection plate, a plurality of pin detection holes, a plurality of signal terminals, a plurality of signal terminals, a plurality of signal terminals, a plurality of signal terminals, a plurality of signal terminals, a plurality of signal terminals, a plurality of signal terminals and a plurality of signal terminals, wherein the pin detection holes are formed on the non-metal insulation detection plate and are in one-to-one correspondence with the signal terminals of the detected power module; the metal frame surrounds the outer edge of the non-metal insulation detection plate and is fixed together with the non-metal insulation detection plate; and the at least two positioning structures are symmetrically formed on the two sides of the metal frame. The jig can be suitable for a novel power module without positioning X-pins, can prevent static electricity from influencing the detected power module, can reduce the weight of the jig, is convenient to operate, improves the detection efficiency, and can reduce the detection cost.

Description

Technical Field

[0001] This utility model relates to the semiconductor field, and in particular to a fixture for testing the position of signal terminals in power modules. Background Technology

[0002] As a key component of the motor controller in new energy vehicles, the input-output characteristics of IGBT power modules directly affect the performance of the motor controller, thus impacting the driving range of new energy vehicles. IGBT power modules come in various packaging forms; a typical package mainly includes a chip, an AMB / DBC insulating board, a frame, and a heat sink.

[0003] Automotive power IGBT modules have numerous crimped or soldered pins, which are connected to the PCB via crimping or soldering to establish electrical signal connections. Because the pin position is affected by the packaging manufacturing process, it is difficult to control. To ensure proper PCB assembly on the customer's production line, the pin position needs to be inspected when the module comes off the production line.

[0004] Existing technology for pin position detection uses a modular pin position inspection fixture, whose inspection accuracy is higher than that of the PCB. Therefore, if the IGBT module pins can pass the fixture inspection, the PCB can be properly assembled at the customer's location.

[0005] refer to Figure 1 As shown, the existing signal terminal position detection fixture is made of metal and is designed based on mass-produced HPD modules. The detection plate of the fixture has detection through-holes corresponding to the pin positions. The HPD module has two positioning X-pins, which the fixture uses for positioning. During testing, the fixture is positioned using the two X-pins and then mounted on the automotive power IGBT module. If the pin position is accurate, the pin will smoothly insert into the detection through-hole.

[0006] With technological advancements, newer, more compact power modules have emerged to meet the size requirements of electronic controls in new vehicle models. The new power module design eliminates the two positioning X-pins on the HPD, rendering existing signal terminal position detection fixtures unusable for accurate positioning detection. Utility Model Content

[0007] The utility model description section introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0008] The technical problem to be solved by this utility model is to provide a signal terminal position measurement fixture for accurately locating and detecting the position of the pin in the novel power module.

[0009] To solve the above-mentioned technical problems, this utility model provides a fixture for testing the position of signal terminals of power modules, comprising:

[0010] The metal detection plate 3 has multiple pin detection holes 2 formed thereon, and the position of each pin detection hole 2 corresponds one-to-one with the position of the signal terminal of the power module 7 being tested.

[0011] A metal frame 4 is fixed to the metal detection plate 3 around the outer edge of the metal detection plate 3.

[0012] At least two positioning structures are symmetrically formed on both sides of the metal frame 4, and the symmetry can be central symmetry or linear symmetry.

[0013] Preferably, the signal terminal position inspection fixture for the power module is further improved, with a mounting groove formed on the inner side of the metal frame 4, and the metal detection plate 3 is inserted into the mounting groove around its perimeter and fixed to the metal frame 4 by bolts.

[0014] Preferably, the signal terminal position measurement fixture for the power module is further improved by having two positioning structures arranged diagonally on the metal frame 4.

[0015] Preferably, the signal terminal position measurement fixture for the power module is further improved by having four positioning structures arranged at the four corners of the metal frame 4.

[0016] Preferably, the positioning structure of the signal terminal position measurement fixture for the power module is further improved as follows:

[0017] Positioning post mounting holes are formed on the metal frame 4;

[0018] The non-metallic insulating positioning post 5 is interference-fitted into the positioning post mounting hole, and is used to insert into the positioning hole of the power module 7 under test or to abut against the side wall of the frame of the power module 7 under test for positioning.

[0019] Preferably, the non-metallic insulating positioning post 5 of the signal terminal position inspection fixture for the power module is made of copper.

[0020] Preferably, the positioning structure of the signal terminal position measurement fixture for the power module is further improved as follows:

[0021] A positioning recess 6, formed in the metal frame 4, is used to align and accommodate the dome pillar 8 of the power module 7 under test. In power devices, a dome pillar refers to a structure with a dome-shaped feature, which may be related to heat dissipation, mechanical protection, or a specific packaging form. This design helps improve the performance and reliability of the power module.

[0022] Preferably, the metal detection plate 3 is made of copper, which is further improved in the signal terminal position measurement fixture for the power module.

[0023] Through the above structural design, this utility model can achieve at least the following technical effects;

[0024] 1. In actual testing, existing technologies using metal testing plates conduct static electricity when in contact with pins, which may affect the power module being tested. Therefore, this invention improves upon this by using a non-metallic insulating material for the testing plate, such as plastic. Correspondingly, using copper for the testing plate, compared to metal, not only reduces the weight of the fixture but also facilitates operation and improves testing efficiency.

[0025] 2. This utility model features a split structure, with the non-metallic insulating detection board and the metal frame being relatively independent. When the external frame structure of the power module remains unchanged but the pin positions change, only the plastic detection board needs to be replaced, thus reducing testing costs.

[0026] 3. The non-metallic insulating positioning post of this utility model is made of copper, which can avoid the influence of static electricity on the device. The non-metallic insulating positioning post is inserted into the positioning hole of the power module under test or abuts against the side wall of the frame of the power module under test for positioning, eliminating the need for positioning X-pin. Attached Figure Description

[0027] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, these drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by the exemplary embodiments of the present invention. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0028] Figure 1This is a top view schematic diagram of an existing signal terminal position measurement fixture.

[0029] Figure 2 This is a schematic diagram of the structure of the first embodiment of this utility model.

[0030] Figure 3 This is a schematic diagram of the structure of the second embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures

[0032] Detection plate positioning X-Pin column positioning hole 1

[0033] pin detection hole 2

[0034] Metal Detection Board 3

[0035] Metal Frame 4

[0036] Non-metallic insulating positioning post 5

[0037] Positioning recess 6

[0038] Power module under test 7

[0039] dome column 8. Detailed Implementation

[0040] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can fully understand other advantages and technical effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of this utility model can be implemented in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this utility model thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements.

[0041] First embodiment;

[0042] refer to Figure 2 As shown, this utility model provides a fixture for testing the position of signal terminals of a power module, comprising:

[0043] The metal detection plate 3 has multiple pin detection holes 2 formed thereon. The position of each pin detection hole 2 corresponds one-to-one with the position of the signal terminal of the power module 7 being tested. The metal detection plate 3 is made of copper.

[0044] A metal frame 4 is fixed to the metal detection plate 3 around the outer edge of the metal detection plate 3.

[0045] At least two positioning structures are symmetrically formed on both sides of the metal frame 4;

[0046] The metal frame 4 has an installation groove on its inner side, and the metal detection plate 3 is inserted into the installation groove and fixed to the metal frame 4 by bolts.

[0047] In this embodiment, there are four positioning structures, which are respectively arranged at the four corners of the metal frame 4;

[0048] The positioning structure includes:

[0049] Positioning post mounting holes are formed on the metal frame 4;

[0050] The non-metallic insulating positioning post 5 is interference-fitted into the positioning post mounting hole. It is used to insert into the positioning hole of the power module 7 under test or to abut against the side wall of the frame of the power module 7 under test for positioning. The non-metallic insulating positioning post 5 is made of copper.

[0051] Second embodiment;

[0052] refer to Figure 3 As shown, this utility model provides a fixture for testing the position of signal terminals of a power module, comprising:

[0053] The metal detection plate 3 has multiple pin detection holes 2 formed thereon. The position of each pin detection hole 2 corresponds one-to-one with the position of the signal terminal of the power module 7 being tested. The metal detection plate 3 is made of copper.

[0054] A metal frame 4 is fixed to the metal detection plate 3 around the outer edge of the metal detection plate 3.

[0055] At least two positioning structures are symmetrically formed on both sides of the metal frame 4;

[0056] The metal frame 4 has an installation groove on its inner side, and the metal detection plate 3 is inserted into the installation groove and fixed to the metal frame 4 by bolts.

[0057] In this embodiment, there are four positioning structures, symmetrically arranged on two opposite sides of the metal frame 4;

[0058] The positioning structure includes:

[0059] A positioning recess 6 is formed in the metal frame 4 for aligning the dome post 8 that houses the power module 7 being tested.

[0060] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0061] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A fixture for testing the position of signal terminals in a power module, characterized in that, include: Metal detection plate (3) with multiple pin detection holes (2) formed thereon, the position of each pin detection hole (2) corresponds one-to-one with the position of the signal terminal of the power module (7) being tested; A metal frame (4) is fixed to the metal detection plate (3) around the outer edge of the metal detection plate (3); At least two positioning structures are symmetrically formed on both sides of the metal frame (4).

2. The signal terminal position measurement fixture for a power module as described in claim 1, characterized in that: The metal frame (4) has an installation groove on its inner side, and the metal detection plate (3) is inserted into the installation groove around its perimeter and fixed to the metal frame (4) by bolts.

3. The signal terminal position measurement fixture for a power module as described in claim 1, characterized in that: It has two positioning structures, which are arranged diagonally on the metal frame (4).

4. The signal terminal position measurement fixture for a power module as described in claim 1, characterized in that: It has four positioning structures, which are respectively arranged at the four corners of the metal frame (4).

5. The signal terminal position measurement fixture for a power module as described in claim 3 or 4, characterized in that, The positioning structure includes: Positioning post mounting holes are formed on the metal frame (4); The non-metallic insulating positioning post (5) is interference-fitted into the positioning post mounting hole. It is used to insert into the positioning hole of the power module under test (7) or to abut against the side wall of the frame of the power module under test (7) for positioning.

6. The signal terminal position measurement fixture for a power module as described in claim 5, characterized in that: The non-metallic insulating positioning post (5) is made of copper.

7. The signal terminal position measurement fixture for a power module as described in claim 3 or 4, characterized in that, The positioning structure includes: A positioning recess (6) is formed in the metal frame (4) for aligning the dome pillar (8) that houses the power module (7) being tested.

8. The signal terminal position measurement fixture for a power module as described in any one of claims 1-7, characterized in that: The metal detection plate (3) is made of copper.

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