TWI832582B - Electric vehicle cooling device having enhanced bonding strength - Google Patents

Abstract

An electric vehicle water-cooling device having enhanced bonding strength includes a water-cooling body, a first surface spray coating layer and a second surface spray coating layer. The thickness of the first surface spray coating layer ranges from 0.03 mm to 0.18 mm. The thickness of the second surface spray coating layer ranges from 0.01 mm to 0.6 mm. The first surface spray coating layer is formed on the water-cooling body. The top surface of the first surface spray coating layer is bonded with the bottom surface of the second surface spray coating layer. The surface texture formed on the top surface of the first surface spray coating layer and the surface texture formed on the bottom surface of the second surface spray coating layer are arranged alternately or overlapped along a horizontal direction.

Description

Electric vehicle power module water cooling radiator with high joint strength

The present invention relates to a water-cooling radiator, specifically to a water-cooling radiator for an electric vehicle power module with high joint strength.

The current operating power of the power module of electric vehicles is very high. Without appropriate heat dissipation measures, the temperature of the power module of the electric vehicle may exceed the allowable temperature, resulting in performance deterioration and damage.

Therefore, the power modules of current electric vehicles are installed on water-cooled radiators through various bonding processes to meet heat dissipation requirements. However, the overall joint strength of current electric vehicle water-cooling radiators cannot meet higher requirements.

In view of this, the inventor has been engaged in the development and design of related products for many years. He felt that the above deficiencies could be improved, so he devoted himself to research and applied academic theories, and finally proposed an invention that is reasonably designed and effectively improves the above deficiencies.

The technical problem to be solved by the present invention is to provide a water-cooled radiator for electric vehicle power modules with high joint strength in view of the shortcomings of the existing technology.

Embodiments of the present invention provide a water-cooled radiator for electric vehicle power modules with high joint strength, including: a water-cooled radiator body, a first surface spray coating, and a second surface spray coating, the first surface spray coating The thickness of the second surface spray layer is between 0.03~0.18mm, the thickness of the second surface spray layer is between 0.01~0.06mm, the first surface spray layer is formed on the water cooling radiator body, and the thickness of the first surface spray layer is The surface is joined to the bottom surface of the second surface spray layer, and the texture formed on the surface of the first surface spray layer overlaps with the texture formed on the bottom surface of the second surface spray layer along the horizontal direction. One of the intertwined ones.

In a preferred embodiment, the water-cooling radiator body is made of one of aluminum and aluminum alloy.

In a preferred embodiment, a cooling flow channel for cooling fluid to circulate is formed inside the water-cooling radiator body, and the first surface spray layer is positioned corresponding to the cooling flow channel.

In a preferred embodiment, the first surface spray layer and the second surface spray layer are respectively cold spray layers formed by cold spraying one of copper, silver and nickel.

In a preferred embodiment, the texture formed on the surface of the first spray layer is spaced surface concave arcs, and the texture formed on the bottom surface of the second spray layer is spaced bottom concave arcs.

In a preferred embodiment, the texture formed on the surface of the first surface spray layer is spaced concave arcs on the surface, and the texture formed on the bottom surface of the second spray layer is spaced convex arcs on the bottom surface.

In a preferred embodiment, the surface roughness (Rz) of the second surface spray layer is set to 30~80um.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and illustration and are not used to limit the present invention.

The following is a description of the relevant implementation modes disclosed in the present invention through specific specific examples. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depictions based on actual dimensions, as is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of the present invention. In addition, the term "or" used in this article shall include any one or combination of multiple associated listed items, depending on the actual situation.

[First Embodiment]

Please refer to FIG. 1 to FIG. 5 , which is one embodiment of the present invention. The embodiment of the present invention provides a water-cooling radiator for an electric vehicle power module with high joint strength for forming a joint with the electric vehicle power module. . As shown in Figures 1 and 2, a water-cooled radiator for an electric vehicle power module with high joint strength provided according to an embodiment of the present invention basically includes a water-cooled radiator body 10, a first surface spray coating 20, and A second surface spray layer 30 .

In this embodiment, the water-cooling radiator body 10 can be made of thermally conductive material, such as aluminum or aluminum alloy. Furthermore, a cooling flow channel 101 for circulating cooling fluid is formed inside the water-cooling radiator body 10 .

In this embodiment, the thickness of the first surface spray layer 20 is between 0.03~0.18mm, and the thickness of the second surface spray layer 30 is between 0.01~0.06mm. That is, the maximum thickness of the first surface spray layer 20 is The maximum thickness of the second surface spray layer 30 is three times, and the minimum thickness of the first surface spray layer 20 is also three times the minimum thickness of the second surface spray layer 30 . Furthermore, the first surface spray layer 20 is formed on the water-cooled radiator body 10 and corresponds to the position of the cooling flow channel 101 formed inside the water-cooled radiator body 10 so that the heat energy generated by the power module of the electric vehicle can pass through. The first surface bonding layer 20 is conducted to the water-cooled radiator body 10 and quickly takes away the heat energy through the cooling fluid (such as water or ethylene glycol) in the cooling channel 101 .

Moreover, the first surface spray layer 20 has an opposite surface 21 and a bottom surface 22, the second surface spray layer 30 has an opposite surface 31 and a bottom surface 32, and the surface 21 of the first surface spray layer 20 and the bottom surface of the second surface spray layer 30 32 are joined together, and the texture formed by the surface 21 of the first surface spray layer 20 and the texture formed by the bottom surface 32 of the second surface spray layer 30 overlap along the horizontal direction, so that the second surface spray layer 30 and the first surface spray layer 30 overlap. The normal temperature bonding strength of the surface spray layer 20 is at least 30MPa.

In detail, as shown in FIGS. 2 and 3 , the first surface spray layer 20 may be a cold spray layer, that is, the first spray layer 20 is formed on the water-cooled radiator body 10 by cold spraying, and is formed by cold spraying. In this manner, the texture formed on the surface 21 of the first surface spray coating 20 is spaced apart surface concave arcs 211.

Furthermore, as shown in FIGS. 2 , 4 and 5 , the second surface spray layer 30 may be a cold spray layer, that is, the second surface spray layer 30 is formed on the surface 21 of the first surface spray layer 20 by cold spraying. , and the texture formed on the bottom surface 32 of the second surface spray layer 30 is formed into spaced bottom surface concave arcs 321 by cold spraying. Furthermore, as shown in FIGS. 4 and 5 , when the second surface spray layer 30 is formed along the horizontal direction by cold spraying on the surface 21 of the first surface spray layer 20 , the bottom surface of the second surface spray layer 30 is made to have a concave arc 321 The surface concave arcs 211 of the first surface bonding layer 20 overlap in the horizontal direction, so that the normal temperature bonding strength of the second surface spray layer 30 and the first surface bonding layer 20 is at least 30 MPa.

In other embodiments, the texture formed on the surface 21 of the first surface spray layer 20 is formed by cold spraying into spaced surface convex arcs (the surface concave arcs 211 in the example of FIG. 3 are reversed by 180 degrees), and the texture is formed by cold spraying. The cold spraying method causes the texture formed on the bottom surface 32 of the second surface spray layer 30 to be spaced apart convex arcs on the bottom surface. Moreover, when the second surface spray layer 30 is formed along the horizontal direction on the surface 21 of the first surface spray layer 20 by cold spraying, the bottom surface of the second surface spray layer 30 is convexly aligned with the surface of the first surface spray layer 20 The convex arcs overlap along the horizontal direction.

In this embodiment, the first surface spray layer 20 and the second surface spray layer 30 may be cold spray layers formed by cold spraying copper, silver or nickel respectively. In addition, the second surface spray layer 30 serves as a bonding interface layer between the first surface spray layer 20 and the electric vehicle power module, and the roughness (Rz) of the surface 31 of the second surface spray layer 30 is set to 30~80um. In this way, the subsequent joint strength with the power module of the electric vehicle can be increased.

[Second Embodiment]

Please refer to FIG. 6 to FIG. 8 , which is a second embodiment of the present invention. This embodiment is substantially the same as the first embodiment, and the differences are explained as follows.

In this embodiment, the cold spraying method is used to make the texture formed on the surface 21 of the first surface spraying layer 20 be spaced surface concave arcs 211, and the cold spraying method is used to make the bottom surface 32 of the second surface spraying layer 30 The texture formed is spaced bottom convex arcs 322. Furthermore, as shown in FIGS. 7 and 8 , when the second surface spray layer 30 is formed along the horizontal direction by cold spraying on the surface 21 of the first surface spray layer 20 , the bottom surface of the second surface spray layer 30 is made to have a convex arc 322 The surface concave arcs 211 of the first surface spray layer 20 are intersected along the horizontal direction, so that the normal temperature bonding strength of the second surface spray layer 30 and the first surface spray layer 20 is at least 30 MPa.

In other embodiments, the cold spraying method is used to make the texture formed on the surface 21 of the first surface spray layer 20 be spaced surface convex arcs (the surface concave arcs 211 in the example of FIG. 6 are reversed by 180 degrees), and the texture is formed by cold spraying. The cold spraying method causes the texture formed on the bottom surface 32 of the second surface spray layer 30 to be spaced bottom surface concave arcs (the bottom surface concave arcs 321 in the example of FIG. 5 ). Furthermore, when the second surface spray layer 30 is formed on the surface 21 of the first surface spray layer 20 by cold spraying in the horizontal direction, the bottom surface of the second surface spray layer 30 is concavely arcuate and the surface of the first surface spray layer 20 is formed. Convex arcs form an intersection.

Based on the above, the electric vehicle power module water-cooled radiator with high joint strength provided by the present invention can at least pass through the "water-cooled radiator body", "first surface spray layer", "second surface spray layer", "The thickness of the first surface spray coating is between 0.03~0.18mm, and the thickness of the second surface spray coating is between 0.01~0.06mm", "The first surface spray coating is formed on the body of the water-cooled radiator", "The first surface spray coating The surface of the layer is joined to the bottom surface of the second surface spray layer, and the texture formed on the surface of the first surface spray layer and the texture formed on the bottom surface of the second surface spray layer form overlapping and intersecting patterns along the horizontal direction. The technical solution of "One" can effectively make the normal temperature joint strength of the first surface spray layer and the second surface spray layer be at least 30MPa, thereby effectively strengthening the overall joint strength of the water-cooled radiator of the electric vehicle power module.

The contents disclosed above are only preferred and feasible embodiments of the present invention, and do not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

10: Water cooling radiator body 101: Cooling runner 20: First surface spray coating 21:Surface 211: Surface concave arc 22: Bottom surface 30: Second surface spray coating 31:Surface 32: Bottom 321: Bottom concave arc 322: Bottom convex arc

Figure 1 is a schematic plan view (top view) of the first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view along line II-II in FIG. 1 .

Figure 3 is a schematic plan view (top view) of the first surface spray coating according to the first embodiment of the present invention.

4 is a schematic plan view (top view) when the second surface spray layer is formed on the first surface spray layer according to the first embodiment of the present invention.

5 is a schematic plan view (top view) after the second surface spray layer is formed on the first surface spray layer according to the first embodiment of the present invention.

Figure 6 is a schematic plan view (top view) of the first surface spray coating according to the second embodiment of the present invention.

7 is a schematic plan view (top view) when the second surface spray layer is formed on the first surface spray layer according to the second embodiment of the present invention.

8 is a schematic plan view (top view) after the second surface spray layer is formed on the first surface spray layer according to the second embodiment of the present invention.

10: Water cooling radiator body

101: Cooling runner

20: First surface spray coating

21:Surface

22: Bottom surface

30: Second surface spray coating

31:Surface

32: Bottom

Claims (6)

A water-cooled radiator for electric vehicle power modules with high joint strength, including: a water-cooled radiator body, a first surface spray layer, and a second surface spray layer, the thickness of the first surface spray layer is between 0.03 ~0.18mm, the thickness of the second surface spray layer is between 0.01~0.06mm, the first surface spray layer is formed on the water-cooled radiator body, the surface of the first surface spray layer is in contact with the third surface spray layer The bottom surfaces of the two surface spray layers are joined, and the texture formed on the surface of the first surface spray layer and the texture formed on the bottom surface of the second surface spray layer form one of overlapping or intersecting along the horizontal direction. , and the surface roughness (Rz) of the second surface spray layer is set to 30 to 80um. The electric vehicle power module water-cooling radiator with high joint strength as claimed in claim 1, wherein the water-cooling radiator body is made of one of aluminum and aluminum alloy. The water-cooled radiator for electric vehicle power modules with high joint strength as claimed in claim 2, wherein a cooling channel for cooling fluid to circulate is formed inside the water-cooled radiator body, and the first surface The sprayed layer corresponds to the location of the cooling flow channel. The water-cooled radiator for electric vehicle power modules with high joint strength as claimed in claim 1, wherein the first surface spray layer and the second surface spray layer are respectively one of cold spray copper, silver and nickel. The resulting cold spray coating. The water-cooling radiator for electric vehicle power modules with high joint strength as claimed in claim 4, wherein the texture formed on the surface of the first surface spray layer is an alternating pattern. The spaced surface is concave arc, and the texture formed by the bottom surface of the second surface spray layer is spaced apart concave arcs on the bottom surface. The water-cooled radiator for electric vehicle power modules with high joint strength as claimed in claim 4, wherein the texture formed on the surface of the first surface spray coating is spaced concave arcs on the surface, and the second surface spray coating The texture formed on the bottom surface of the layer is spaced bottom convex arcs.

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