A power device package and a mounting method of a power device package

Abstract

The application provides a power device packaging device and a mounting method of the power device packaging device, which comprises a power device and a heat sink body, the heat sink body comprises a heat sink support, a V-shaped elastic sheet and a pressing block, the heat sink support is provided with a mounting groove, the power device is arranged in the mounting groove, the V-shaped elastic sheet has a supporting end and a mounting end, the supporting end is arranged in the mounting groove and abuts against the power device, and the pressing block abuts against the mounting end so that the V-shaped elastic sheet presses the power device. During the mounting process of the power device, the pressing block is mounted downward, and the force of the supporting end on the power device is a horizontal force, that is, the force directions of the mounting end and the supporting end are perpendicular to each other. In this way, even if the pressing block is mounted loosely, the mounting strength of the power device will not be affected, and the mounting reliability of the power device is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, in particular to a power device packaging device and a mounting method of the power device packaging device. BACKGROUND

[0002] With the increasing environmental pollution and the gradual depletion of oil resources, the hydrogen energy industry has been widely developed and valued. In recent years, China has continuously invested in research in the field of hydrogen energy fuel cells in the hope of replacing traditional fuel power with new energy power to solve various ecological problems caused by resource depletion and environmental pollution. In recent years, the rapid development of the hydrogen fuel cell industry has led to an increasing variety of fuel cell systems, and factors such as power density, cost, application convenience, and reliability determine the market competitiveness of fuel cell systems. Fuel cell systems have numerous components and complex structural arrangements. Currently, components are becoming increasingly mature and stable, and highly integrated design is the main direction of today's technological development.

[0003] Among the eight major components of a fuel cell system, the controller is required for the stack, air compressor, and hydrogen circulating pump. As an important component of the DC / DC converter and the controller, the power module has evolved from IGBT to SIC. With the continuous development of the new energy industry, the cost of obtaining power modules on the market is becoming increasingly high, and gradually, TO247 packaged SIC power devices have become the choice of more and more enterprises. With the increasing demand for high power density and high integration, the challenges to product reliability and spatial arrangement are increasing, and the innovation of hardware to achieve the above-mentioned requirements will inevitably involve huge cost investment, which is not conducive to the product facing the post-subsidy market. The previous arrangement method is to fasten through an insulating support sleeve and an M3 bolt. This installation method has problems of torque decay and lateral assembly, resulting in waste of space, reduction of assembly efficiency, and decay of heat dissipation effect. Moreover, each power device fixing point has corresponding electrical safety risks. At present, the mainstream optimized power device fixing methods on the market, such as spring sheet compression, rubber pad compression, welding, and gluing, all have high costs, complex positioning and assembly processes, and large sizes. Therefore, in the design process, not only should the positioning and assembly scheme be optimized, but also the electrical safety design should be fully considered, while the cost should be reduced to the greatest extent, the product size should be reduced, and the product competitiveness should be improved.

[0004] TECHNICAL CONTENT

[0005] In order to solve the problem of large volume of fuel cell power devices, the present application designs a new mounting structure, which uses a spring sheet to clamp the power device on the packaging device, which is simple and convenient to install, and the packaging device has a small volume, thereby reducing the cost.

[0006] To solve the above technical problems, the power device packaging device provided by the application comprises a power device and a heat sink body, the heat sink body comprises a heat sink support, a V-shaped spring and a pressing block, the heat sink support is provided with a mounting groove with an open upper end, the power device is arranged in the mounting groove, the V-shaped spring has a supporting end and a mounting end, the mounting end and the supporting end are respectively located at two ends of the V-shaped spring, the supporting end is arranged in the mounting groove and abuts against the power device body, the pressing block abuts against the mounting end to make the V-shaped spring press the power device tightly, and the mounting end and the supporting end have a tendency to expand to restore the natural state. The power device packaging device provided by the application cancels the internal water channel structure, the heat sink support is only used for mounting the power device, the volume of the heat sink support is obviously reduced, the mounting space is saved, and the production cost is reduced. Meanwhile, the mounting groove is formed in the heat sink support, the power device and the V-shaped spring are simultaneously mounted in the mounting groove, the power device and the V-shaped spring do not occupy the space outside the heat sink support, the space arrangement of the packaging device is reasonable, and the volume of the packaging device is further reduced. Furthermore, since the power device is mounted in the heat sink support, the heat sink support can protect the power device, and collision of the power device is avoided to prevent the power device from being deviated or even damaged. In addition, during the mounting process of the power device, the pressing block abuts against the mounting end of the V-shaped spring to drive the supporting end of the V-shaped spring to press the power device tightly on the inner wall surface of the mounting groove when the pressing block is mounted, so that the mounting and positioning of the power device can be completed only by mounting the pressing block, the V-shaped spring does not need to be mounted additionally, the mounting process is simple and convenient, the mounting efficiency is improved, and the labor cost is reduced. Moreover, the pressing block is mounted downward, the force of the supporting end on the power device is a horizontal force, that is, the stress directions of the mounting end and the supporting end are perpendicular, so that even if the pressing block is mounted loosely, the mounting strength of the power device will not be affected, and the mounting reliability of the power device is further improved.

[0007] Preferably, the power device is multiple, multiple supporting ends are arranged on the mounting end at intervals, and the supporting ends correspond to the power devices one by one. By arranging multiple supporting ends on the mounting end at intervals, the multiple supporting ends are spaced apart from each other and do not affect each other, each supporting end provides a separate elastic force for each power device, the reliability of the mounting process can be improved, and meanwhile, each V-shaped spring can mount multiple power devices by arranging multiple supporting ends, and the compatibility is high.

[0008] Preferably, a through hole is arranged on the supporting end along the extension direction of the supporting end. By arranging the through hole on the supporting end of the V-shaped spring along the extension direction of the supporting end, on the one hand, the material of the V-shaped spring can be reduced, and the production cost can be reduced, and on the other hand, the through hole arranged along the extension direction of the supporting end can release stress without damaging the strength, improve the elastic force of the V-shaped spring, and avoid damage of the supporting end under stress.

[0009] Preferably, the through hole gradually increases along the extension direction of the supporting end. The through hole gradually increases along the extension direction of the supporting end, that is, the closer to the root of the supporting end, the larger the area of the supporting end, and the greater the strength of the supporting end. Since the supporting end is connected to the mounting end, after the V-shaped elastic sheet is abutted and mounted with the power device, the root of the supporting end is the most stress-concentrated place. Setting a larger strength in the stress-concentrated place is beneficial to improving the strength of the V-shaped elastic sheet and improving the reliability.

[0010] Preferably, the heat dissipation support is internally provided with a front-rear through cavity, and a partition plate is arranged in the cavity, which divides the cavity into a plurality of mounting grooves. The cavity is arranged in the heat dissipation support, and the heat dissipation cavity is divided into at least two mounting grooves by the partition plate. Each mounting groove can independently mount a group of power devices, and the two groups of power devices do not affect each other.

[0011] Preferably, the top end of the partition plate is recessed to form an embedding groove, the mounting end extends into the embedding groove, and the pressing block is mounted in the embedding groove to abut against the mounting end. The top of the partition plate is provided with a mounting groove, and the mounting end of the V-shaped elastic sheet is arranged in the embedding groove. The V-shaped elastic sheet is pressed when the pressing block is mounted, so that the supporting end of the V-shaped elastic sheet abuts against the power device to clamp the power device. The installation is simple and convenient.

[0012] Preferably, the embedding groove has the same width from top to bottom, the pressing block has a wedge structure with a large upper part and a small lower part, the lower end of the pressing block is a mounting surface, the mounting surface is a plane, the side surface of the pressing block is an abutment surface, and the abutment surface is arranged to be inclined. The pressing block has a wedge structure with a large upper part and a small lower part. During the mounting process, the supporting end of the V-shaped elastic sheet is gradually pressed tightly, and the installation is reliable and firm.

[0013] Preferably, the side end of the V-shaped elastic sheet is provided with a buckle, and the buckle is clamped with the groove wall of the embedding groove. By arranging the buckle at the end of the V-shaped elastic sheet and clamping the buckle with the groove wall of the embedding groove, the V-shaped elastic sheet is prevented from being separated from the heat dissipation support when the pressing block is not mounted, which plays a pre-tightening role.

[0014] Preferably, a heat-conducting insulating pad is arranged between the power device and the heat dissipation support, and the heat-conducting insulating pad is arranged close to the side wall of the mounting groove. The heat-conducting insulating pad is arranged on the power device and the heat dissipation support. Since the heat dissipation support is usually made of aluminum profile with good heat dissipation effect to ensure good heat dissipation, aluminum is easy to conduct electricity, and the power device is electrified. Therefore, in order to meet the requirements of heat conduction and non-conduction, a heat-conducting insulating pad needs to be arranged between the power device and the heat dissipation support.

[0015] Preferably, the outer end surface of the heat dissipation support is provided with heat dissipation fins formed by concave forming on the outer end surface of the heat dissipation support, the heat dissipation fins comprising a plurality of parallel arranged short fins, and a groove is arranged between adjacent short fins. Since the power device packaging device of the present application cancels the internal water channel structure, in order not to affect the heat dissipation performance, the heat dissipation fins need to be arranged on the outer end surface of the heat dissipation support, and the heat dissipation fins can increase the contact area of the heat dissipation support and improve the heat dissipation performance.

[0016] Another aspect of the present application provides a mounting method of a power device packaging device, the power device packaging device comprising a power device and a heat sink body, the heat sink body comprising a heat dissipation support, a V-shaped elastic piece and a pressing block, the heat dissipation support being provided with an upper end opening mounting slot, the mounting method comprising: first, positioning the pressing block on the PCB; then, inserting the power device into the corresponding welding hole of the PCB; then, assembling the V-shaped elastic piece with the heat dissipation support; then, assembling the heat dissipation support to the PCB; and finally, fixedly connecting the heat dissipation support with the pressing block. The present application first installs the pressing block and then installs the heat dissipation support, and realizes the fixation of the heat dissipation support and the pressing block by adopting the downward installation mode. In the process of pressing down the heat dissipation support, the worker can support the V-shaped elastic piece by means of the gravity of the heat dissipation support itself, so as to realize the fixation of the power device, which is more labor-saving.

[0017] Compared with the prior art, the power device packaging device of the present application has at least the following technical effects: the power device packaging device of the present application cancels the internal water channel structure, the heat dissipation support is only used for mounting the power device, the volume of the heat dissipation support is significantly reduced, the installation space is saved, and the production cost is reduced. At the same time, the present application opens a mounting slot in the interior of the heat dissipation support, and simultaneously installs the power device and the V-shaped elastic piece in the mounting slot, so that the power device and the V-shaped elastic piece do not occupy the space outside the heat dissipation support, the space arrangement of the packaging device is reasonable, and the volume of the packaging device is further reduced. Furthermore, since the power device is installed in the interior of the heat dissipation support, the heat dissipation support can protect the power device, avoiding that the power device is subjected to collision to cause installation deviation or even damage. In addition, in the installation process of the power device of the present application, when the pressing block is installed, the mounting end of the pressing block abuts against the V-shaped elastic piece to drive the supporting end of the V-shaped elastic piece to press the power device tightly against the inner wall surface of the mounting slot, so that only the installation of the pressing block is needed to complete the installation and positioning of the power device, and the V-shaped elastic piece does not need to be additionally installed, the installation process is simple and convenient, the installation efficiency is improved, and the labor cost is reduced. Moreover, the pressing block is installed downward, and the force of the supporting end on the power device is a horizontal force, that is, the stress directions of the mounting end and the supporting end are perpendicular, so that even if the pressing block is installed loosely, it will not affect the installation strength of the power device, and the installation reliability of the power device is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1is a structural schematic diagram of a power device packaging device of the present application.

[0019] Figure 2 is an exploded view of a power device packaging device of the present application.

[0020] Figure 3 is a structural schematic diagram of a heat dissipation support of a power device packaging device of the present application.

[0021] Figure 4 is a sectional view of a heat dissipation support of a power device packaging device of the present application.

[0022] Figure 5 is a sectional view of a power device packaging device of the present application in an installed state.

[0023] Figure 6 is a schematic diagram of a power device packaging device of the present application in an installation process.

[0024] Figure 7 is a structural schematic diagram of a pressing block of a power device packaging device of the present application.

[0025] Figure 8 is a sectional view of a pressing block of a power device packaging device of the present application.

[0026] Figure 9 is a structural schematic diagram of a V-shaped spring of a power device packaging device of the present application.

[0027] Figure 10 is a side view of a V-shaped spring of a power device packaging device of the present application.

[0028] Figure 11 is an expanded view of a V-shaped spring of a power device packaging device of the present application.

[0029] The names of the components marked in the figure are as follows: 1, power device; 2, heat dissipation support; 21, partition plate; 211, embedding groove; 22, mounting groove; 3, pressing block; 4, V-shaped spring; 41, support end; 42, mounting end; 43, buckle; 44, through hole; 5, heat-conducting insulating pad; 6, bolt. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present application, the following detailed description is given in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other manners different from those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0032] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are intended to indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application. As for the positional relationship such as "upstream", "downstream" and the like, it is based on the positional relationship when the fluid flows normally.

[0033] In addition, the terms "first", "second", and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", 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 the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] As Figures 1-11As shown, the application provides a power device 1 packaging device, specifically, including a power device 1 and a radiator body, the radiator body includes a radiator support 2, a V-shaped spring 4 and a pressing block 3, wherein the radiator support 2 is provided with an installation slot 22 with an open upper end, the power device 1 includes a power device body and a pin, the power device 1 is arranged in the installation slot 22 with the pin facing upwards, the V-shaped spring 4 includes a supporting end 41 and an installation end 42, the supporting end 41 and the installation end 42 of the V-shaped spring 4 are located at both ends of the V-shaped spring 4 respectively, the supporting end 41 of the V-shaped spring 4 abuts against the power device 1, and the installation end 42 of the V-shaped spring 4 abuts against the pressing block 3, when the pressing block 3 is installed on the radiator support 2, the installation end 42 of the V-shaped spring 4 can be fixed by the pressing block 3, and then the supporting end 41 extrudes the power device 1 to clamp the power device 1 and the radiator support 2, realizing the installation and positioning of the power device 1, at this time, the supporting end 41 and the installation end 42 of the V-shaped spring 4 are compressed, and have an expansion tendency to return to the natural state.

[0037] The packaging device of the power device 1 of the application cancels the internal water channel structure, the radiator support 2 is only used for installing the power device 1, the volume of the radiator support 2 is obviously reduced, the installation space is saved, and the production cost is reduced. At the same time, the application opens the installation slot 22 in the inside of the radiator support 2, installs the power device 1 and the V-shaped spring 4 in the installation slot 22 at the same time, the power device 1 and the V-shaped spring 4 do not occupy the space outside the radiator support 2, the space arrangement of the packaging device is reasonable, and the volume of the packaging device is further reduced. Furthermore, since the power device 1 is installed in the inside of the radiator support 2, the radiator support 2 can protect the power device 1, avoiding that the power device 1 is subjected to collision to cause installation deviation or even damage. In addition, in the installation process of the power device 1 of the application, when the pressing block 3 is installed, the pressing block 3 abuts against the installation end 42 of the V-shaped spring 4 to drive the supporting end 41 of the V-shaped spring 4 to press the power device 1 on the inner wall surface of the installation slot 22, so that the installation and positioning of the power device 1 can be completed only by installing the pressing block 3, without the need to additionally install the V-shaped spring 4, the installation process is simple and convenient, the installation efficiency is improved, and the labor cost is reduced. Moreover, the pressing block 3 is installed downward, the force of the supporting end 41 on the power device 1 is a horizontal force, that is, the stress directions of the installation end 42 and the supporting end 41 are perpendicular, so that even if the pressing block 3 is installed loosely, the installation strength of the power device 1 will not be affected, and the installation reliability of the power device 1 is further improved.

[0038] In the present application, the power device 1 is a SIC power device, which comprises an externally insulated power device body and a pin extending upward from the power device body. In the present application, when the pressing block 3 is not in abutment with the mounting end 42 of the V-shaped elastic sheet 4, the supporting end 41 of the V-shaped elastic sheet 4 is in a natural state or a slightly compressed state, at this time, the supporting force of the supporting end 41 on the power device body is zero or small. When the pressing block 3 is in abutment with the mounting end 42, since the supporting end 41 and the mounting end 42 of the V-shaped elastic sheet 4 are located at two ends of the V-shaped elastic sheet 4 respectively, when the mounting end 42 is subjected to the extrusion force from the pressing block 3, the mounting end 42 will have a tendency of relative rotation, and the mounting end 42 will transmit corresponding force to the supporting end 41 to make the supporting end 41 abut on the power device body, so that the power device 1 is in abutment with the heat dissipation bracket 2, and reliable installation is achieved.

[0039] In the present application, the cross section of the V-shaped elastic sheet 4 is V-shaped, and the V-shaped elastic sheet 4 comprises a mounting end 42 and a supporting end 41 located at two ends of the V-shaped elastic sheet respectively, wherein the length of the supporting end 41 is greater than the length of the mounting end 42. Since the length of the supporting end 41 is greater than the length of the mounting end 42, when the mounting end 42 is subjected to a small force, the supporting end can make the power device 1 abut on the heat dissipation bracket, and the installation reliability is high. The mounting end 42 of the V-shaped elastic sheet 4 is provided with a plurality of supporting ends 41, and the plurality of supporting ends 41 are arranged at intervals and do not affect each other. Meanwhile, the present application also has a plurality of power devices 1, and the plurality of power devices 1 correspond to the plurality of supporting ends 41 one by one. In this way, by arranging a plurality of supporting ends 41 on the mounting end 42 at intervals, the plurality of supporting ends 41 do not affect each other at intervals, each supporting end 41 provides a separate elastic force for each power device 1, which can improve the reliability of the installation process. Meanwhile, each V-shaped elastic sheet 4 can install a plurality of power devices 1 by arranging a plurality of supporting ends 41, and the compatibility is high. It can be understood that each V-shaped elastic sheet can be provided with one supporting end or a plurality of supporting ends, the distance between each supporting end can be the same or different, and the formation of each supporting end can be the same or different.

[0040] In the present application, the support end 41 is provided with a through hole 44 in the same direction as the extension direction of the support end 41, and the through hole 44 gradually increases along the extension direction of the support end 41. By providing the through hole 44 along the extension direction of the support end 41 on the support end 41 of the V-shaped elastic sheet 4, on the one hand, the material of the V-shaped elastic sheet 4 can be reduced, and the production cost can be reduced, and on the other hand, the through hole 44 arranged along the extension direction of the support end 41 can release stress without damaging the strength, improve the elasticity of the V-shaped elastic sheet 4, and avoid damage to the support end 41 under stress. Moreover, the through hole 44 gradually increases along the extension direction of the support end 41, that is, the area of the support end 41 is larger near the support end 41 and the mounting end 42, and the strength of the support end 41 is larger. Since the support end 41 is connected to the mounting end 42, after the V-shaped elastic sheet 4 is abutted and mounted with the power device 1, the root of the support end 41 is the place where the stress is most concentrated. Arranging a larger strength at the place where the stress is concentrated is beneficial to improving the strength of the V-shaped elastic sheet 4 and improving the reliability.

[0041] In the present application, the heat dissipation support 2 is made of aluminum profile, specifically, the heat dissipation support 2 is made by extrusion molding process, which does not need to involve the development of high-pressure die casting mold, has lower cost, and the surface quality of the extrusion molding process is controllable, reducing the machining amount of the product and further reducing the production cost. Moreover, due to the particularity of the extrusion molding process, the length of the packaging device can be designed to be extended as needed to accommodate more power devices 1, reducing the design cost of repeated development of the packaging device. Moreover, the outer end surface of the heat dissipation support 2 is provided with heat dissipation fins, the heat dissipation fins are formed by concave from the outer end surface of the heat dissipation support 2, the heat dissipation fins include a plurality of parallel arranged short fins, and grooves are arranged between adjacent short fins. The heat dissipation fins arranged on the outer end surface of the heat dissipation support 2 can increase the contact area of the heat dissipation support 2 and improve the heat dissipation performance.

[0042] In the present application, the heat dissipation support 2 is provided with a front and rear through cavity, and the cavity is provided with a partition plate 21, which divides the cavity into left and right installation grooves 22, that is, the heat dissipation support 2 has an M-shaped structure. Further, the lower end of the heat dissipation support 2 is provided with a through first screw fixing hole, and the first screw fixing hole is arranged along the partition plate 21, and the pressing block 3 is provided with a through second screw fixing hole, so that the heat dissipation support 2 and the pressing block 3 can be connected and fixed by the bolt 6 passing through the first screw fixing hole and the second screw fixing hole in sequence, realizing reliable fixation of the heat dissipation support 2 and the pressing block 3.

[0043] In the application, the top end of the partition plate 21 is concave downward to form a slot 211, the mounting end 42 of the V-shaped elastic sheet 4 extends into the slot 211, and the pressing block 3 is mounted and fastened in the slot 211. In this way, the mounting of the pressing block 3 can simultaneously extrude the mounting end 42 of the V-shaped elastic sheet 4, so that the supporting end 41 of the V-shaped elastic sheet 4 abuts against the power device 1 to clamp the power device 1, and the installation is simple and convenient. Specifically, the slot 211 has the same width from top to bottom, the pressing block 3 has a wedge-shaped structure with a large upper part and a small lower part, the side surface thereof is a slope with a guiding function, the bottom surface thereof is a plane, and the bottom surface has a through screw hole which can be used for fastening connection with the heat dissipation support 2 through a screw or for positioning. The pressing block 3 has a wedge-shaped structure with a large upper part and a small lower part, and the supporting end 41 of the V-shaped elastic sheet 4 is gradually pressed during the installation of the pressing block 3, so that the installation is reliable and firm. During the installation of the pressing block 3, since the pressing block 3 has a wedge-shaped structure with a large upper part and a small lower part and the slot 211 has the same width from top to bottom, when the pressing block 3 gradually sinks into the slot 211, the pressing block 3 gradually applies a force to the mounting end 42 and transmits the force to the supporting end 41, so as to press the supporting end 41 to tightly press the power device 1 against the side wall of the mounting groove 22, thereby achieving fastening and installation.

[0044] In the application, the end of the V-shaped elastic sheet 4 is provided with a buckle 43 which is clamped with the side wall of the slot 211. In this way, the buckle 43 is clamped with the slot wall of the slot 211, so as to avoid the disengagement of the V-shaped elastic sheet 4 from the heat dissipation support 2 when the pressing block 3 is not installed, thereby playing a pre-fastening role.

[0045] In the application, the heat-conducting insulating pad 5 is arranged between the power device 1 and the heat dissipation support 2, and the thickness of the heat-conducting insulating pad 5 is less than 0.3 mm. Since the heat dissipation support 2 is usually made of aluminum profile with good heat dissipation effect to ensure good heat dissipation, aluminum is easy to conduct electricity, and the power device 1 is electrified. Therefore, in order to meet the requirements of heat conduction and non-conduction, the heat-conducting insulating pad 5 needs to be arranged between the power device 1 and the heat dissipation support 2. In the application, the heat-conducting insulating pad 5 is arranged in close contact with the side wall of the mounting groove 22.

[0046] Another aspect of the application provides a mounting method of a power device packaging device. Specifically, the power device packaging device of the application comprises a power device 1 and a heat sink body, the heat sink body comprises a heat dissipation support 2, a V-shaped elastic sheet 4 and a pressing block 3, the V-shaped elastic sheet 4 comprises a mounting end 42 and a supporting end 41 which are integrally connected and arranged away from each other, the heat dissipation support 2 is provided with a mounting groove 22, and the packaging device is further provided with a heat-conducting insulating pad 5.

[0047] The mounting process of the power device packaging device of the application is as follows:

[0048] First step: position the PCB on the tooling, place the pressing block 3 on the PCB, and limit the position through the screw hole on the pressing block 3.

[0049] Second step: insert the power device 1 into the corresponding solder hole of the PCB board.

[0050] Third step: prepare the heat dissipation support 2, pre-assemble the V-shaped spring 4 to the heat dissipation support 2, and clamp the buckle 43 of the V-shaped spring 4 into the side wall of the embedding groove 211 for limiting.

[0051] Fourth step: paste the heat-conducting insulating pad 5 into the mounting groove 22, and check whether there is air bubble.

[0052] Fifth step: mount the heat dissipation support 2 to the corresponding position on the PCB board.

[0053] Sixth step: fasten the heat dissipation support 2 and the pressing block 3 by using the bolt 6, and the mounting is completed.

[0054] The power device 1 packaging device of the present application is easy to assemble and disassemble, and makes full use of the characteristics that the side surface of the wedge-shaped pressing block 3 is guided by the flat bottom surface to support, so that the process of fastening the pressing block 3 and the heat dissipation support 2 realizes the unfolding and limiting of the V-shaped spring 4. When disassembling, after removing the bolt 6, only need to slowly withdraw the wedge-shaped pressing block 3, and the heat dissipation support 2, the heat-conducting insulating pad 5, the V-shaped spring 4 and the power device 1 can be separated perfectly, which is convenient for repairing and replacing.

[0055] The above is only the preferred embodiment of the present application, and is not used to limit the implementation range of the present application. Any equivalent change and modification made according to the present application is covered by the scope of the claims of the present application, and will not be listed one by one here.

Claims

1. A power device package apparatus comprising a power device and a heat sink body, characterized by, The heat sink body comprises a heat dissipation support, a V-shaped spring and a pressing block, the heat dissipation support is provided with an installation slot with an open upper end, the power device is arranged in the installation slot, the V-shaped spring has a supporting end and an installation end, the installation end and the supporting end are respectively located at two ends of the V-shaped spring, the supporting end is arranged in the installation slot and abuts against the power device body, the pressing block abuts against the installation end to make the V-shaped spring press the power device tightly, the installation end and the supporting end have a tendency to expand to restore a natural state; The length of the supporting end is greater than the length of the installation end; The heat dissipation support is provided with a cavity penetrating through front and back, the cavity is provided with a partition plate, and the partition plate divides the cavity into a plurality of installation slots; The top end of the partition plate is recessed to form an embedding groove, the installation end extends into the embedding groove, and the pressing block is arranged in the embedding groove to abut against the installation end; The embedding groove has the same width from top to bottom, the pressing block has a wedge-shaped structure with a large upper part and a small lower part, the lower end of the pressing block is an installation surface, the installation surface is a plane, the side surface of the pressing block is an abutting surface, and the abutting surface is arranged obliquely.

2. The power device package apparatus according to claim 1, wherein, The power device is a plurality of power devices, a plurality of supporting ends are arranged on the installation end at intervals, and the supporting ends correspond to the power devices one by one.

3. The power device package apparatus according to claim 2, wherein, The supporting end is provided with a through hole arranged along the extension direction of the supporting end.

4. The power device package apparatus according to claim 3, wherein The through hole gradually increases along the extension direction of the supporting end.

5. The power device package apparatus of claim 1, wherein, The side end of the V-shaped spring is provided with a buckle, and the buckle is clamped with the groove wall of the embedding groove.

6. The power device package apparatus of claim 1, wherein, A heat-conducting insulating pad is arranged between the power device and the heat dissipation support, and the heat-conducting insulating pad is arranged close to the side wall of the installation slot.

7. The power device package apparatus of claim 1, wherein A heat dissipation fin is arranged on the outer end surface of the heat dissipation support, the heat dissipation fin is recessed from the outer end surface of the heat dissipation support, the heat dissipation fin comprises a plurality of short fins arranged in parallel, and a groove is arranged between adjacent short fins.

8. A mounting method of a power device package device including a power device and a heat sink body according to any one of claims 1 to 7, characterized by, The heat sink body comprises a heat dissipation support, a V-shaped spring and a pressing block, the heat dissipation support is provided with an installation slot with an open upper end, and the installation method comprises the following steps: firstly, positioning the pressing block on the PCB; then, inserting the power device into the corresponding welding hole of the PCB; then, assembling the V-shaped spring and the heat dissipation support; then, assembling the heat dissipation support to the PCB; finally, fixing and connecting the heat dissipation support and the pressing block.

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