Assembly tool for power module and drive board

By designing sliding components and locking components between the power module and the driving plate to form a preset gap, the pin disengagement problem caused by thermal expansion and contraction of the convex column is solved, and stable connection under different temperature environments is achieved to prevent the power module from failing.

CN223198959UActive Publication Date: 2025-08-08GAC AION NEW ENERGY AUTOMOBILE CO LTD
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Patent Information

Application Number
CN202422449400.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-10
Publication Date
2025-08-08
Estimated Expiration
2034-10-10

AI Technical Summary

Technical Problem

In the prior art, the connection between the power module and the driving board is prone to disengagement due to thermal expansion and contraction of the convex column under different temperature environments, resulting in failure of the power module.

Method used

An assembly tool including a base assembly, a sliding assembly and a locking assembly is designed to slide in different directions through the slider and the gasket to form a preset gap, and the locking assembly is used to press the drive plate, the gasket and the power module to prevent the pin from being disengaged.

Benefits of technology

Under different temperature environments, the preset gap avoids the disconnection between the pins and the power module, ensures stable connection and prevents the power module from failing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an assembly tool of power module and drive board, including base subassembly, slide subassembly and locking subassembly, base subassembly is used for bearing power module and drive board, slide subassembly includes slider and gasket, slider and gasket fixed connection, the locking subassembly is used for locking the locking subassembly, the locking subassembly is used for locking the locking subassembly, and the locking subassembly is used for locking the locking subassembly. The sliding block can slide back and forth in the direction close to or away from the power module relative to the base assembly, the sliding block is used for driving the gasket to slide into or out of a gap between the power module and the driving plate, and the locking assembly is used for pressing the driving plate, the gasket and the power module. According to the utility model, when the ambient temperature is increased, the convex column of the power module expands upwards, and the contact pin is prevented from being separated from the base of the power module due to the gap between the power module and the driving plate.
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Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and in particular to an assembly tool for a power module and a drive board of a motor controller. Background Art

[0002] Current electric vehicle motor controllers mostly utilize power modules with direct-plug packages. These modules connect to the driver circuit board at two points: a mechanical connection: the power module is secured to the driver board using self-tapping screws, with screw mounting holes mateable with bosses. A second electrical connection: the power module's pins connect to vias on the driver board, allowing electrical signals to be exchanged via soldering. Due to the inherent tolerances of the bosses and their thermal expansion and contraction under varying temperatures, stress builds up on the power module's pins. In extreme cases, the pins can be pulled from the module's base, causing the module to fail and the electric vehicle to lose power.

[0003] The current common assembly method is to first secure the power module's boss with a self-tapping screw and then solder the pins. However, this assembly method fails to account for the power module's operating temperature. For example, in high-temperature environments, the boss, made of plastic with a high coefficient of expansion, will expand as the temperature rises. This can cause the boss to push upward against the driver board, creating upward stress at the solder joint between the driver board and the pins. This can cause the power module's pins to pull out, potentially leading to module failure.

[0004] Therefore, it is necessary to design an assembly tool for the power module and the driver board that can prevent the power module from failing under different ambient temperatures. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide an assembly tool for a power module and a driver board, which can prevent the power module from failing under different ambient temperatures.

[0006] The technical solution of the present utility model provides an assembly tool for a power module and a drive plate, including a base assembly, a sliding assembly and a locking assembly. The base assembly is used to carry the power module and the drive plate. The sliding assembly includes a slider and a gasket. The slider is fixedly connected to the gasket. The slider can slide back and forth relative to the base assembly toward and away from the power module. The slider is used to drive the gasket to slide into or out of the gap between the power module and the drive plate. The locking assembly is used to press the drive plate, the gasket and the power module together.

[0007] Furthermore, the base assembly includes a bottom plate and a slide rail, the slide rail is fixed on the bottom plate, and the slider can slide along the slide rail.

[0008] Furthermore, the sliding assembly further includes a sliding air pump, and the sliding air pump is used to drive the sliding block to slide.

[0009] Furthermore, there are two sliding assemblies, which are located on opposite sides of the base assembly.

[0010] Furthermore, there are two locking assemblies, which are respectively installed above the sliding assembly.

[0011] Furthermore, the sliding assembly further includes a positioning post, which is mounted on the slider; the locking assembly includes a locking seat, which is provided with a positioning hole, and the positioning post can be inserted into the positioning hole.

[0012] Furthermore, after the positioning hole is matched with the positioning column, the locking seat is connected to the slider through a locking nut.

[0013] Furthermore, the locking assembly further includes a pressing plate, which extends from the locking seat and is used to press the driving plate.

[0014] Furthermore, the locking assembly further includes a locking air pump, and the locking air pump is used to push the locking seat.

[0015] Furthermore, the pressing sheet is an elastic sheet.

[0016] The above technical solution has the following beneficial effects:

[0017] In the present invention, a gasket is pushed onto the top of the power module via a sliding assembly. When the drive board is placed onto the top of the power module, the gasket is positioned between the drive board and the power module, creating a gap between the drive board and the power module. After the locking assembly compresses the drive board, gasket, and power module, the pins of the power module are first welded to the drive board, the gasket is then removed, and finally, the self-tapping screws between the drive board and the power module are tightened to secure the power module to the drive board, creating a gap between the power module and the drive board. When the ambient temperature rises, the protrusion of the power module expands upward, and the presence of the gap prevents the pins from detaching from the base of the power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the power module and driver board after installation;

[0020] Figure 2 yes Figure 1 A partial enlarged view of

[0021] Figure 3 is a schematic diagram of the deformation of the convex column under different ambient temperatures;

[0022] Figure 4 This is a schematic diagram of an assembly tool for a power module and a driver board in one embodiment of the present utility model;

[0023] Figure 5 yes Figure 4 Partial exploded view.

[0024] Reference table of accompanying symbols:

[0025] Power module 10, driver board 20, pin 101, boss 102, mounting hole 201;

[0026] Base assembly 1: base plate 11, slide rail 12;

[0027] Sliding assembly 2: slider 21, gasket 22, sliding air pump 23, positioning column 24, mounting nut 25;

[0028] Locking assembly 3: locking seat 31, pressing piece 32, locking air pump 33, locking nut 34, positioning hole 311. DETAILED DESCRIPTION

[0029] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0030] It is easy to understand that according to the technical solution of the present invention, a variety of structural methods and implementation methods can be replaced by those skilled in the art without changing the essential spirit of the present invention. Therefore, the following specific embodiments and drawings are only illustrative of the technical solution of the present invention and should not be regarded as the entire present invention or as a limitation or restriction of the technical solution of the utility model.

[0031] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the drawings. They are relative concepts and may vary depending on the location and usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0032] In some embodiments of the present invention, Figure 4-Figure 5As shown, the assembly tooling of the power module and the drive plate includes a base component 1, a sliding component 2 and a locking component 3. The base component 1 is used to carry the power module 10 and the drive plate 20. The sliding component 2 includes a slider 21 and a gasket 22. The slider 21 is fixedly connected to the gasket 22. The slider 21 can slide back and forth relative to the base component 1 toward and away from the power module 10. The slider 21 is used to drive the gasket 22 to slide into or out of the gap between the power module 10 and the drive plate 20. The locking component 3 is used to press the drive plate 20, the gasket 22 and the power module 10 together.

[0033] Specifically, Figure 1 As shown, the driving board 20 is assembled above the power module 10. Figure 2 As shown, the pins 101 of the power module 10 are welded to the driving board 20, and the bosses 102 are inserted into the mounting holes 201 of the driving board 20 and then fastened by self-tapping screws (not shown).

[0034] like Figure 3 As shown, when the ambient temperature is around 25°C, the boss 102 does not deform and does not affect the connection between the pin 101 and the driver board 20. When the ambient temperature reaches 105°C, the boss 102 expands, pushing the driver board 20 upward, which may cause the pin 101 to separate from the driver board 20. When the ambient temperature reaches -40°C, the boss 102 contracts, causing the driver board 20 to deform downward, which has no effect on the connection between the pin 101 and the driver board 20.

[0035] Therefore, the present embodiment aims to prevent the pin 101 from being separated from the driving board 20 at a relatively high ambient temperature.

[0036] like Figure 4 As shown, the base assembly 1 is used to prevent the assembled power module 10 and the driving board 20 from moving. In addition, the sliding assembly 2 can also slide relative to the base assembly 1.

[0037] Specifically, Figure 5 As shown, the sliding assembly 2 includes a slider 21 and a gasket 22. The slider 21 can drive the gasket 22 to slide toward the power module 10, so that the gasket 22 is located above the power module 10. When the driving board 20 is placed above the power module 10, the gasket 22 is clamped between the driving board 20 and the power module 10, leaving a gap between the two.

[0038] The assembly process of the power module 10 and the driver board 20 is as follows:

[0039] First, place the power module 10 on the base assembly 1 so that the pins 101 of the power module 10 face upwards;

[0040] Push the slider 21 horizontally toward the power module 10 so that the gasket 22 is located above the power module 10 ;

[0041] Place the drive plate 20 on top of the gasket 22;

[0042] The locking assembly 3 locks the drive plate 20, the gasket 22 and the power module 10 from top to bottom;

[0043] Soldering the driver board 20 and the pins 101 of the power module 10;

[0044] Move the slider 21 horizontally away from the power module 10 to separate the gasket 22 from the power module 10 ;

[0045] Tighten the self-tapping screws between the driving board 20 and the power module 10 .

[0046] After the self-tapping screws are tightened, the driver board 20 is fixed to the power module 10, and a gap exists between the driver board 20 and the power module 10. Thus, when the ambient temperature rises, the boss 102 expands. However, due to the preset gap, even if the boss 102 moves upward, it still does not affect the connection between the pin 101 and the driver board 20, preventing the pin 101 from falling off the base of the power module 10, thereby preventing failure of the power module 10.

[0047] Furthermore, if Figure 4-Figure 5 As shown, the base assembly 1 includes a base plate 11 and a slide rail 12. The slide rail 12 is fixed to the base plate 11, and the slider 21 can slide along the slide rail 12. The base plate 11 is a flat plate structure for placing the power module 10. The slide rail 12 is arranged along the length of the base plate 11, and the slider 21 can slide along the slide rail 12 toward the side of the power module 10.

[0048] Furthermore, if Figure 5 As shown, the sliding assembly 2 further includes a sliding air pump 23 for driving the sliding block 21 to slide. The sliding air pump 23 is capable of telescopic movement, and is used to push the sliding block 21 to move the gasket 22 to the top of the power module 10 and to withdraw it from between the power module 10 and the driving plate 20.

[0049] Preferably, the sliding air pump 23 and the slider 21 are fastened together by screws.

[0050] Preferably, if Figure 4 As shown, there are two sliding assemblies 2, which are located on opposite sides of the base assembly 1. Specifically, the two sliding assemblies 2 are located on both sides of the base assembly 1 in the length direction, and each sliding assembly 2 is provided with two gaskets 22, so as to extend into the four corners of the power module 10.

[0051] Optionally, there may be three or four sliding components 2 , which can slide in different directions respectively.

[0052] Preferably, if Figure 4 As shown, there are two locking assemblies 3, which are respectively installed above the two sliding assemblies 2. Two pressing pieces 32 are extended from each locking assembly 3, and each pressing piece 32 corresponds to the gasket 22, which is conducive to pressing the gasket 22 tightly.

[0053] Likewise, there may be three or four locking assemblies 3 to press different parts of the drive plate 20 .

[0054] Furthermore, if Figure 5 As shown, the sliding assembly 2 further includes a positioning column 24 , which is mounted on the slider 21 . The locking assembly 3 includes a locking seat 31 , which is provided with a positioning hole 311 , into which the positioning column 24 can be inserted.

[0055] When the positioning post 24 is engaged with the positioning hole 311 , the locking assembly 3 is installed above the sliding assembly 2 , so as to facilitate alignment of the pressing piece 32 and the gasket 22 .

[0056] Furthermore, if Figure 5 As shown, after the positioning hole 311 cooperates with the positioning column 24, the locking seat 31 is connected to the slider 21 through the locking nut 34. The locking nut 34 can connect the locking seat 31 to the slider 21 to prevent the locking seat 31 and the slider 21 from falling off.

[0057] Furthermore, if Figure 5 As shown, the locking assembly 3 further includes a pressing piece 32 , which extends from the locking seat 31 and is used to press the driving plate 20 .

[0058] Preferably, the pressing piece 32 is an elastic piece, and when the pressing piece 32 presses the driving plate 20 , a certain elastic deformation occurs.

[0059] Furthermore, if Figure 5 As shown, the locking assembly 3 also includes a locking air pump 33, which is used to push the locking seat 31. When the air pump 33 pushes the locking seat 31, the locking seat 31 drives the pressing plate 32 to press against the drive board 20, thereby achieving compression between the drive board 20, the gasket 22, and the power module 10. After the pins 101 are welded to the drive board 20, the pressing plate 32 is released from the drive board 20, and the locking nut 34 is loosened to remove the locking assembly 3.

[0060] Preferably, before pulling out the gasket 22, the locking air pump 33 can be controlled to retract first, and the pressure plate 32 releases the drive plate 20, but does not separate the locking assembly 3 and the sliding assembly 2. When the sliding assembly 2 drives the gasket 22 to be pulled out, the locking assembly 3 moves horizontally along with the slider 21.

[0061] In the present invention, a sliding assembly pushes a gasket onto the top of the power module. When the drive board is placed above the power module, the gasket is positioned between the drive board and the power module, creating a gap between the two. After the locking assembly compresses the drive board, gasket, and power module, the power module's pins are first welded to the drive board, the gasket is then removed, and finally, the self-tapping screws between the drive board and the power module are tightened to secure the drive board and the power module. A gap is created between the drive board and the power module. When the ambient temperature rises, the protrusion of the power module expands upward, and the presence of the preset gap prevents the pins from detaching from the base of the power module.

[0062] The above description is only the principle and preferred embodiment of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other variations can be made, which should also be considered as the scope of protection of the present invention.

Claims

1. An assembly tool for a power module and a driver board, characterized in that: It includes a base assembly, a sliding assembly and a locking assembly. The base assembly is used to carry the power module and the drive plate. The sliding assembly includes a slider and a gasket. The slider is fixedly connected to the gasket. The slider can slide back and forth relative to the base assembly toward and away from the power module. The slider is used to drive the gasket to slide into or out of the gap between the power module and the drive plate. The locking assembly is used to press the drive plate, the gasket and the power module.

2. The assembly tool for the power module and the driver board according to claim 1, characterized in that: The base assembly includes a bottom plate and a slide rail, wherein the slide rail is fixed to the bottom plate, and the slider can slide along the slide rail.

3. The assembly tool for the power module and the driver board according to claim 1, characterized in that: The sliding assembly further includes a sliding air pump, and the sliding air pump is used to drive the sliding block to slide.

4. The assembly tool for the power module and the driver board according to claim 1, characterized in that: There are two sliding components, which are located on opposite sides of the base component.

5. The assembly tool for the power module and the driver board according to claim 4, characterized in that: There are two locking assemblies, which are respectively installed above the sliding assemblies.

6. The assembly tool for the power module and the driver board according to claim 1, characterized in that: The sliding assembly further comprises a positioning post, which is mounted on the sliding block. The locking assembly comprises a locking seat, which is provided with a positioning hole, and the positioning post can be inserted into the positioning hole.

7. The assembly tool for the power module and the driver board according to claim 6, characterized in that: After the positioning hole is matched with the positioning column, the locking seat is connected to the slider through a locking nut.

8. The assembly tool for the power module and the driver board according to claim 6, characterized in that: The locking assembly further includes a pressing piece, which extends from the locking seat and is used to press the driving plate.

9. The assembly tool for the power module and the driver board according to claim 8, characterized in that: The locking assembly further includes a locking air pump, which is used to push the locking seat.

10. The assembly tool for the power module and the driver board according to claim 8, characterized in that: The pressing sheet is an elastic sheet.