Double-sided water-cooling power module and welding positioning and fixing device thereof

Abstract

The utility model relates to a double-sided water-cooling power module and a welding positioning and fixing device thereof, and the double-sided water-cooling power module is located between an upper substrate and a lower substrate of the welding positioning and fixing device, and is fastened and assembled through matched positioning pin holes and detachable screws on the upper substrate and the lower substrate. Compared with the prior art, the utility model has the advantages of simple and convenient installation, high process stability consistency and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of radiators, in particular to a double-sided water-cooling power module and a welding device thereof. Background Art

[0002] With the development of the new energy vehicle industry, inverters, as a core component of electric and hybrid vehicles, are facing increasingly higher demands for power performance. Currently, the automotive industry is exploring and developing a trend towards 800V battery high-voltage systems using new SiC transistors. This technology promises longer driving range and faster charging, but the rapidly increasing power density also places significant loads on the switching components in the inverter. Severe overheating poses a serious threat to the normal operation of the entire system module, and can even damage it. Besides optimizing the design of the switching components themselves to reduce losses, another approach to addressing this problem is to enhance the performance of the heat sink and use it to dissipate excess heat.

[0003] Although welding pads are currently used instead of thermal interface materials to connect the heat sink and the heating device during the assembly of water-cooled radiators, they are mainly used in the cooling process of single-sided radiators due to process limitations, and have problems such as difficulty in positioning the pads and difficulty in maintaining consistency in the welding process. Utility Model Content

[0004] The purpose of the present invention is to provide a welding device for a double-sided water-cooled power module in order to overcome the defects of the above-mentioned prior art, and to simplify the assembly process of the double-sided water-cooled power module based on the welding device.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] According to one aspect of the utility model, a welding positioning and fixing device for a double-sided water-cooled power module is provided, wherein the double-sided water-cooled power module includes a heat dissipation device and a heating element, and the welding device includes a positioning member and a fixing member, wherein the positioning member includes a lower substrate and a welding piece positioning member; the fixing member includes a welding piece and an upper substrate; the double-sided water-cooled power module is placed between the lower substrate and the upper substrate, and is arranged in sequence according to the heat dissipation device, the heating element and the heat dissipation device through the matching pin hole structure of the lower substrate and the upper substrate; the heat dissipation device and the heating element are welded and connected by welding pieces; the welding piece is arranged between the heat dissipation device and the heating element through the welding piece positioning piece.

[0007] As a preferred technical solution, the upper substrate is provided with a module positioning hole and a substrate positioning hole; the lower substrate includes a module positioning pin and a substrate positioning pin, and also includes a first positioning hole.

[0008] As a preferred technical solution, the upper base plate and the lower base plate are hollow structures; and the upper base plate further includes screw holes, and the lower base plate further includes bolt columns matching the screw holes of the upper base plate.

[0009] As a preferred technical solution, the soldering plate positioning sheet further includes a plurality of soldering plate positioning grooves, and the arrangement of the soldering plate positioning grooves matches the arrangement of the heating components.

[0010] As a preferred technical solution, the soldering piece positioning plate further includes a second positioning hole, and the soldering piece positioning plate is placed between the heat dissipation device and the heating component through the module positioning pin and the second positioning hole.

[0011] As a preferred technical solution, detachable fastening screws are provided in the screw holes of the upper base plate and the bolt columns of the lower base plate.

[0012] According to another aspect of the present invention, a double-sided water-cooled power module is provided, including a heat dissipation device and a heating element. The heat dissipation device includes a sewer heat dissipation plate 15 and an upper water channel heat dissipation plate 20. The double-sided water-cooled power module is composed of a sewer heat dissipation plate, a heating element and an upper water channel heat dissipation plate from bottom to top, and is assembled and welded by the above-mentioned welding positioning and fixing device.

[0013] As a preferred technical solution, the heating device includes terminals that match the module positioning pins of the lower substrate in the welding device.

[0014] As an optimal technical solution, the double-sided water-cooled power module further includes a supporting device, which includes a retaining frame fixed between the heating device and the upper water channel heat dissipation plate.

[0015] As a preferred technical solution, the retaining frame includes a pin that matches the first positioning hole of the lower base plate in the welding device.

[0016] According to another aspect of the present invention, a double-sided water-cooled power module is provided, including a heat dissipation device and a heating element. The heat dissipation device includes a sewer heat dissipation plate and an upper water channel heat dissipation plate. The double-sided water-cooled power module is composed of a sewer heat dissipation plate, a heating element and an upper water channel heat dissipation plate from bottom to top, and is assembled and welded by the above-mentioned welding positioning and fixing device.

[0017] As a preferred technical solution, the heating device includes terminals that match the module positioning pins of the lower substrate in the welding device.

[0018] As an optimal technical solution, it also includes a supporting device, which includes a retaining frame, and the retaining frame is fixed between the heating device and the upper water channel heat dissipation plate.

[0019] As a preferred technical solution, the retaining frame includes a pin that matches the first positioning hole of the lower base plate in the welding device.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] 1) The utility model provides a welding positioning and fixing device for a double-sided water-cooled power module. By providing a welding piece positioning piece, the welding piece assembly is made more accurate to avoid the problem of module welding failure caused by inaccurate welding piece positioning;

[0022] 2) The utility model only uses two upper and lower hollow base plates and a welding piece positioning sheet, which uses fewer parts and is fixed with screws. It is easy to disassemble when reused, the installation process is simple and clear, and the positioning is accurate and convenient, ensuring the consistency and stability of the welding process; BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the welding device in Example 1 of the present utility model;

[0024] Figure 2 This is a schematic diagram of the assembly of a double-sided water-cooled power module device welding device in Example 2 of the present utility model;

[0025] Figure 3 This is a rendering of the completed assembly in Example 2 of the present utility model.

[0026] Reference numerals:

[0027] 1-upper base plate, 2-lower base plate, 3-power module, 4-soldering piece positioning plate, 5-module positioning hole, 6-screw hole, 7-base plate positioning hole, 8-soldering piece positioning groove, 9-second positioning hole, 10-first positioning hole, 11-module positioning pin, 12-base plate positioning pin, 13-terminal positioning pin, 14-bolt column, 15-sewer heat sink, 16-soldering piece, 17-heating device, 18-terminal, 19-retaining frame, 20-upper water heat sink. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0029] Example 1:

[0030] In this embodiment, a welding positioning and fixing device for a double-sided water-cooled power module is provided to assist in welding the double-sided water-cooled power module and simplify the process flow of the welding process.

[0031] The structural diagram of the welding device is as follows Figure 1 As shown, it includes positioning parts and fixing parts. The positioning parts include a lower base plate 2 and a soldering piece positioning piece 4; the fixing parts include a soldering piece 16 and an upper base plate 1; the double-sided water-cooled power module 3 includes a heat dissipation device and a heating element 17.

[0032] To ensure sufficient heat absorption and transfer during welding, the upper and lower base plates 1 and 2 are hollow structures. The lower base plate 2 is equipped with module locating pins 11 for securing and positioning the double-sided water-cooled power module 3, base plate locating pins 12 for securing the upper base plate, and bolt columns 14 for fastening the double-sided water-cooled power module 3. The lower base plate 2 also has a first locating hole 10. The upper base plate 1 is equipped with base plate locating holes 7 that mate with the base plate locating pins 12, module locating holes 5 that mate with the module locating pins 11, and screw holes 6 that mate with the bolt columns 14. Removable fastening screws are installed in the screw holes 6 of the upper base plate 1 and the bolt columns 14 of the lower base plate 2.

[0033] During installation, the double-sided water-cooled power module 3 is placed between the lower substrate 2 and the upper substrate 1, and the pin hole structure matching the lower substrate 2 and the upper substrate 1 is arranged in sequence according to the order of heat dissipation device, heating element 17 and heat dissipation device, and the heat dissipation device and heating element 17 are welded together by welding sheet 16.

[0034] A second positioning hole 9 is provided on the soldering piece positioning piece 4. The soldering piece positioning piece 4 is placed between the heat sink and the heating element 17 through the module positioning pin 11 and the second positioning hole 9. Because the soldering piece positioning piece 4 is provided with a soldering piece positioning groove 8 that matches the arrangement of the heating element 17, the soldering piece 16 can be set between the heat sink and the heating element 17 according to a specific position with the help of the soldering piece positioning piece 4, and the soldering piece positioning piece 4 is removed after the soldering piece 16 is placed in a fixed position.

[0035] Example 2:

[0036] This embodiment provides a double-sided water-cooled power module, which is assembled and welded using the welding positioning and fixing device in the above embodiment.

[0037] The double-sided water-cooled power module includes a heat dissipation device and a heating element 17, as shown in FIG. Figure 2 As shown in the structural diagram, the sewer heat sink 15, the heating device 17 and the upstream heat sink 20 are fixed on the lower base plate 2 of the welding positioning and fixing device through the module positioning pins 11 from bottom to top, wherein the sewer heat sink 15 is provided with a hole structure that is engaged with the module positioning pins 11, and the heating device 17 is provided with a terminal 18 that matches the module positioning pins 11.

[0038] In order to prevent the problem of displacement of the welding piece 16 placed on the heating device 17 due to operational reasons when placing the upper water channel heat sink 20, a supporting device is also provided between the heating device 17 and the upper water channel heat sink 20. The supporting device is a holder 19 with a pin matching the first positioning hole 10 of the lower base plate 2 of the welding device. The holder 19 is installed with the first positioning hole 10 on the lower base plate 2 through the pin. After the installation is completed, the effect is as follows. Figure 3 shown.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A welding positioning and fixing device for a double-sided water-cooled power module, wherein the double-sided water-cooled power module (3) includes a heat dissipation device and a heating element (17), characterized in that: The welding device comprises a positioning member and a fixing member, wherein the positioning member comprises a lower substrate (2) and a welding piece positioning member (4); the fixing member comprises a welding piece (16) and an upper substrate (1); The double-sided water-cooled power module (3) is placed between the lower base plate (2) and the upper base plate (1), and is sequentially arranged in the order of a heat sink, a heating element (17), and a heat sink through a matching pin hole structure of the lower base plate (2) and the upper base plate (1); The heat dissipation device and the heating element (17) are connected by welding via a welding piece (16); The soldering piece (16) is arranged between the heat dissipation device and the heating element (17) through the soldering piece positioning piece (4).

2. A welding positioning and fixing device for a double-sided water-cooled power module according to claim 1, characterized in that: The upper substrate (1) is provided with a module positioning hole (5) and a substrate positioning hole (7); the lower substrate (2) includes a module positioning pin (11) and a substrate positioning pin (12), and also includes a first positioning hole (10).

3. A welding positioning and fixing device for a double-sided water-cooled power module according to claim 2, characterized in that: The upper base plate (1) and the lower base plate (2) are hollow structures; the upper base plate (1) further includes a screw hole (6), and the lower base plate (2) further includes a bolt column (14) matching the screw hole (6) of the upper base plate (1).

4. The welding positioning and fixing device for a double-sided water-cooled power module according to claim 1, characterized in that: The soldering piece positioning piece (4) further comprises a plurality of soldering piece positioning grooves (8), and the arrangement of the soldering piece positioning grooves (8) matches the arrangement of the heating element (17).

5. The welding positioning and fixing device for a double-sided water-cooled power module according to claim 1, characterized in that: The soldering piece positioning plate (4) further includes a second positioning hole (9), and the soldering piece positioning plate (4) is placed between the heat dissipation device and the heating element (17) through the module positioning pin (11) and the second positioning hole (9).

6. The welding positioning and fixing device for a double-sided water-cooled power module according to claim 1, characterized in that: Removable fastening screws are provided in the screw holes (6) of the upper base plate (1) and the bolt columns (14) of the lower base plate (2).

7. A double-sided water-cooled power module, comprising a heat dissipation device and a heating element (17), wherein the heat dissipation device comprises a sewer heat dissipation plate (15) and an upper water heat dissipation plate (20), characterized in that: The double-sided water-cooled power module comprises, from bottom to top, a lower water channel heat sink (15), a heating element (17) and an upper water channel heat sink (20), which are assembled and welded by the welding positioning and fixing device described in any one of claims 2-6.

8. The double-sided water-cooled power module according to claim 7, characterized in that: The heating device (17) includes a terminal (18) that matches the module positioning pin (11) of the lower substrate (2) in the welding device.

9. The double-sided water-cooled power module according to claim 7, characterized in that: It also includes a supporting device, which includes a retaining frame (19) fixed between the heating device (17) and the upper water channel heat dissipation plate (20).

10. The double-sided water-cooled power module according to claim 9, characterized in that: The retaining frame (19) comprises a latch that matches a first positioning hole (10) of a lower base plate (2) in the welding device.

Images