Power module radiator

Abstract

The invention provides a power module radiator which comprises a heat dissipation structure, and the heat dissipation structure is provided with a curved surface structure which corresponds to a deformation area of a corresponding power module. The heat removal efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology, and more particularly to a power module heat sink. Background Technology

[0002] Currently, internal combustion engines, including gasoline engines which are widely used in automobiles, utilize the heat energy generated by the combustion of fuel in the cylinder as power. In these internal combustion engines, heat dissipation is extremely important.

[0003] However, in existing technologies, the height of radiators is usually set to a constant height for ease of manufacturing. During the assembly of the radiator with the power module, stress concentration caused by screw fastening and expansion due to temperature rise can lead to deformation of the loosely fastened parts of the screws. This results in uneven contact between the heat that must be effectively dissipated and the opposite side of the radiator, thus reducing heat dissipation efficiency.

[0004] Therefore, how to provide a power module radiator that can improve heat dissipation efficiency is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a power module heat sink that improves heat dissipation efficiency.

[0006] The present invention provides a power module heat sink, including a heat dissipation structure having a curved surface structure, the curved surface structure corresponding to the deformation area of ​​the corresponding power module.

[0007] Furthermore, the heat dissipation structure includes at least one cooling pin and a pin cover, with the cooling pin disposed on the pin cover; coolant can flow through the cooling pin on the pin cover.

[0008] Furthermore, the top of the cooling pin has an outwardly protruding curved surface structure.

[0009] Furthermore, the pin cover has a curved surface structure.

[0010] Furthermore, the pin cover includes a first pin cover and a second pin cover, with the first end of the cooling pin connected to the first pin cover and the second end of the cooling pin connected to the second pin cover.

[0011] Furthermore, the cap is equipped with a coolant inlet and a coolant outlet.

[0012] Furthermore, the cross-sectional shape of the cooling pin is elliptical or rhomboid.

[0013] Furthermore, when the cross-sectional shape of the cooling pin is rhomboid, one of the sharp corners of the rhombus is positioned opposite the coolant inlet.

[0014] Furthermore, when the number of cooling pins is set to multiple, the multiple cooling pins are arranged in at least one row; when the multiple cooling pins are arranged in two or more rows, the two rows of cooling pins are arranged alternately.

[0015] Furthermore, the heat dissipation structure includes a first heat dissipation structure and a second heat dissipation structure stacked on top of each other; the second heat dissipation structure is used to install the power module.

[0016] The present invention provides a power module heat sink that can improve heat dissipation efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a perspective view of an assembly structure for a water-cooled inverter used in an electric vehicle, which incorporates screw connections and rubber seals between components that correspond to the prior art of the present invention, which consist of cooling oil.

[0019] Figure 2 This is an assembly plan view of a water-cooled inverter structure for electric vehicles, which uses screw connections and rubber seals between cooling oil components corresponding to the prior art of this invention.

[0020] Figure 3 This is a front view of the deformation direction and tendency of a water-cooled inverter structure for electric vehicles, which is assembled and operated using screws and rubber seals, and is a simplified version of the prior art of this invention.

[0021] Figure 4 This simplifies the direction and tendency of deformation when assembling and operating the water-cooled inverter structure for electric vehicles, and the structure uses a method corresponding to the prior art of this invention.

[0022] The components of the cooling oil are assembled using threaded connections and rubber seals.

[0023] Figure 5 It is Figure 3 , Figure 4 An oblique view showing the shape deformation of a water-cooled cooler after assembly or during startup, including the cooling flow path and cooling pins.

[0024] Figure 6 This is a perspective view of the concept of making the height of the cooling pin of the electric vehicle water-cooled radiator curved, according to a preferred embodiment of the present invention.

[0025] Figure 7 This is a perspective view of the shape of the cooling pin height of the electric vehicle water-cooled radiator according to a preferred embodiment of the present invention, which is formed by a curved surface.

[0026] Figure 8 This is a front view of the shape of the cooling pin height of the electric vehicle water-cooled radiator according to a preferred embodiment of the present invention, which is formed by a curved surface.

[0027] Figure 9 This is a perspective view of the concept of the surface where the inner side of the cooling pin cover of the electric vehicle water-cooled radiator meets the cooling pin in a curved shape, according to a preferred embodiment of the present invention.

[0028] Figure 10 This is a perspective view of the actual shape of the inner side of the cooling pin cover of the electric vehicle water-cooled radiator according to a preferred embodiment of the present invention, where the surface where the cooling pin meets the cooling pin is formed in a curved shape.

[0029] Figure 11 This is an example diagram of the movement path of a radiator processing tool equipped with the cooling pins of the present invention.

[0030] Figure 12 This is an example diagram of the intervals of the radiator formed by the cooling pins according to the present invention.

[0031] Figure label:

[0032] 10. Radiator; 11. Cooling pin; 11-1. Front row; 11-2. Rear row; 20. Cooling pin cover; 21. First pin cover; 22. Second pin cover; 40. Bolt; 100. Heat dissipation structure; 110. First heat dissipation structure; 120. Second heat dissipation structure; 210. Upper washer; 220. Lower washer; 400. Power module; 510. Cooling inlet; 520. Cooling outlet. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0034] The following is combined Figure 1-12 The present invention describes a heat sink 10 for a power module 400, which includes a heat dissipation structure having a curved surface structure corresponding to the deformation area of ​​the power module 400.

[0035] The power module 400 refers to the cooling pin 11 and cooling pin 11 cover of the water-cooled inverter radiator 10 of the electric vehicle. By forming the height of the radiator 10 as a curved surface, or by forming the heat dissipation shroud in contact with the radiator 10 as a curved surface, a curved surface is formed during the assembly and startup of the inverter structure, ultimately forming a heat dissipation surface and improving efficiency. This design allows the power module 400, which requires rapid and efficient heat dissipation, to receive heat through surface contact and dissipate heat through the cooling pin 11 and coolant. In this structure, the back of the radiator 10 that is in surface contact with the power module 400 can be ensured to be flat, thereby improving heat transfer efficiency.

[0036] This application maximizes cooling performance by effectively arranging and combining the various plates installed inside the inverter, and allows for the simple fabrication of the radiator 10 and cooling flow path structure. This application solves the problem of reduced heat dissipation efficiency in water-cooled inverter structures for electric vehicles, caused by temperature rise and internal pressure deformation after screw and brake connections.

[0037] Furthermore, the heat dissipation structure includes at least one cooling pin 11 and a pin cover, with the cooling pin 11 disposed on the pin cover; coolant can flow through the cooling pin 11 on the pin cover. That is, at least one cooling pin 11 is disposed in the flow path of the coolant.

[0038] Furthermore, the pin top of the cooling pin 11 is a curved structure that protrudes outward. The height of each part of the radiator 10 corresponding to each cooling pin 11 constituting the upper radiator 10 or the part in the lower radiator 10 where deformation is expected is formed is curved to counteract deformation caused by heat generated after screw assembly and during use.

[0039] Furthermore, the pin cover has a curved surface structure. In this application, the height of the radiator 10 is formed as a curved surface, or the radiator 10 cover that contacts the radiator 10 is formed as a curved surface, thereby offsetting the deformation generated during the assembly and operation of the inverter structure, thus forming a flat surface. This ensures the flatness of the back surface of the radiator 10 that is in surface contact with the power module 400 in the water-cooled inverter structure of the electric vehicle; ultimately, the efficiency of the water-cooling system that receives heat generated from the power module 400 through surface contact and dissipates heat through the radiator 10 is significantly improved.

[0040] Furthermore, the pin cover includes a first pin cover 21 and a second pin cover, with the first end of the cooling pin 11 connected to the first pin cover 21 and the second end of the cooling pin 11 connected to the second pin cover.

[0041] Furthermore, the cap is equipped with a coolant inlet and a coolant outlet.

[0042] Furthermore, the cross-sectional shape of the cooling pin 11 is elliptical or rhomboid.

[0043] Furthermore, when the cross-sectional shape of the cooling pin 11 is rhomboid, one of the sharp corners of the rhombus is positioned opposite to the coolant inlet.

[0044] Furthermore, when the number of cooling pins 11 is set to multiple, the multiple cooling pins 11 are arranged in at least one row; when the multiple cooling pins 11 are arranged in two or more rows, the two rows of cooling pins 11 are arranged alternately.

[0045] Furthermore, the heat dissipation structure includes a first heat dissipation structure and a second heat dissipation structure 120 stacked on top of each other; the second heat dissipation structure 120 is used to install the power module 400. The first heat dissipation structure is an upper heat sink 10, and the second heat sink 10 is a lower heat sink 10.

[0046] In the cooling pin 11 and cooling pin 11 cover structure of the water-cooled inverter radiator 10 of the electric vehicle of the present invention, the upper cooling pin 11 cover, the upper gasket 210, the upper radiator 10, the power module 400, the lower radiator 10 on which the power module 400 is placed, the lower gasket, and the lower cooling pin 11 cover are sequentially connected from top to bottom by bolts. In the gasket, the upper radiator 10, the power module 400, the lower radiator 10 on which the power module 400 is placed, the gasket, and the lower cooling pin 11 cover, a coolant flow path is formed on the inner side. The coolant is introduced and rises through the coolant inlet formed on the lower cooling pin 11 cover, and then falls through the coolant flow path formed on the opposite inner side, and then is discharged 11-2 out of the coolant outlet formed on the front of the lower cooling pin 11 cover.

[0047] The aforementioned power module 400 is fixed to the upper surface of the lower heat sink 10. Multiple protrusions with a length in one direction are formed on the upper surface of the lower heat sink 10, and a power module 400 stabilizing part with an insertion groove corresponding to the protrusions is formed on the lower surface of the power module 400.

[0048] In addition, the aforementioned power module 400 is hexahedral in shape, and multiple connectors protrude laterally, and the external drive board, control board and power board can be directly coupled to the aforementioned connectors.

[0049] In particular, when the power module 400 is inserted into the mounting portion of the lower heatsink 10 unit, the power module 400 must be inserted into the mounting portion so that the connector is positioned in the direction without the protrusion of the lower heatsink 10 unit. The power module 400 consists of multiple switching elements that cause heat to rise due to switching action caused by electrical use. At this time, the power module 400, whose heat rises, is sufficiently cooled between the lower surface of the upper heatsink 10 and the upper surface of the lower heatsink 10 by these multiple switching elements, allowing for a tight fit and minimizing deformation of the upper and lower heatsinks 10 caused by heat generation, thus maintaining a close fit. The switching action works by using the principle that current flows through the output unit momentarily when the current in the input unit exceeds a certain range, thus enabling the circuit to switch on / off, generating heat through this on / off switching. This application uses coolant flowing through the coolant circulation channel to cool the heat generated by the power module 400.

[0050] The radiator 10 of the present invention includes a cooling pin 11 and a cooling pin 11 cover, forming a coolant flow path with a coolant inlet / outlet to allow coolant to flow through the interior. The cooling pin 11 cover consists of an upper pin cover and a lower pin cover. Furthermore, the heat dissipation structure consists of an upper radiator 10 and a lower radiator 10.

[0051] In the above-mentioned coolant flow path, a radiator 10 is constituted by a pair or more radiator parts 10 forming at least one cooling pin 11 and a cooling pin 11 cover, and the upper end of the cooling pin 11 arranged on the radiator part 10 is formed as a convex curved surface.

[0052] When the upper surface of the cooling pin 11 connecting the radiator 10 is flat, the inner side of the cover of the cooling pin 11, which is connected to the radiator 10, is formed as a curved surface convex in the direction of the cooling pin 11. That is, in the water-cooled inverter structure of the electric vehicle, the present invention receives heat by contacting the surface of the power module 400, which requires rapid and efficient heat dissipation. In the structure where heat is dissipated through the cooling pin 11 and cooling water, to improve heat transfer efficiency, the flatness of the back surface of the radiator 10 in contact with the power module 400 must be ensured. To ensure this, the height of the radiator 10 is formed as a curved surface, or the radiator 10 cover in contact with the radiator 10 is formed as a curved surface. This offsets heat through deformation on the curved surface generated during the assembly and startup of the inverter structure. Ultimately, the water-cooling system receives heat generated from the power module 400 through contact and dissipates heat through the radiator 10, thereby improving the efficiency of the water-cooling system.

[0053] When the horizontal end face of the cooling pin 11 is elliptical or multiple rhombuses arranged at predetermined intervals in the front-back and left-right directions, the upper end of the cooling pin 11 is also formed as a convex curved surface.

[0054] Cooling pins 11 are formed at the upper end of the upper radiator 10 or the lower end of the lower radiator 10 to quickly and effectively dissipate heat. The cooling pins 11 have a predetermined depth, but their horizontal cross-section is elliptical or rhomboid, and multiple pins can be arranged at certain intervals in the front-back and left-right directions. Among the multiple cooling pins 11 arranged at certain intervals in the front-back and left-right directions, the cooling pins 11 arranged in the rear row 11-2 are located between the cooling pins 11 arranged in the array.

[0055] In a plurality of cooling pins 11, the interval (b) between adjacent cooling pins 11 in the same column is formed to be wider than the width inside the cooling pin 11. More specifically, the interval (b) between a cooling pin 11 in the same column and the cooling pin 11 to its right is formed to be wider than the left and right width (a) inside the cooling pin 11, thereby preventing the left and right overlap of each cooling pin 11.

[0056] In addition, among the multiple cooling pins 11 formed in the above-mentioned cooling flow path, the length-direction interval (c) between the transverse center line (11-1a) of the cooling pin 11 in the array (11-1) and the transverse center line (11-2a) of the cooling pin 11 in the rear row (11-2a) is formed to be wider than the vertical width (d) of the cooling pin 11, thereby preventing the vertical overlap of each cooling pin 11.

[0057] Therefore, by preventing each cooling pin 11 from overlapping left and right while also preventing it from overlapping top and bottom, the coolant can not only pass through, but also has an appropriate width, thereby increasing the flow rate.

[0058] On the other hand, the horizontal cross-section of the aforementioned elliptical cooling pin 11 is elliptical, and the longer part is oriented in the same direction as the flow of coolant.

[0059] The aforementioned rhomboid cooling pin 11 has a horizontal cross-section with the same four side lengths, and is a rhomboid shape with two diagonals of different lengths. The lengths of the diagonals are...

[0060] Part of it is formed in the same direction as the coolant flow.

[0061] The aforementioned elliptical and rhomboid cooling pins 11 reduce the flow resistance of the coolant, improve the flow rate of the coolant, and at the same time, increase the surface area, thereby improving the heat dissipation efficiency.

[0062] In particular, when using a linearly moving milling cutter for milling, the aforementioned diamond-shaped cooling pin 11 can be simplified to make the path of the milling cutter a straight line, thereby further improving productivity.

[0063] As another embodiment, when the horizontal cross section of the above-mentioned heat sink 10 portion is formed by the surface connected to the upper end of the elliptical or rhomboid cooling pin 11, the inner side of the cooling pin 11 cover that is combined with the above-mentioned heat sink 10 portion is formed as a curved surface that bulges along the direction of the cooling pin 11.

[0064] Therefore, in this invention, in order to ensure the flatness of the back surface of the radiator 10 that is in surface contact with the power module 400 in the water-cooled inverter structure of the electric vehicle, the height of the radiator 10 is formed as a curved surface, or the cover of the radiator 10 that is in contact with the radiator 10 is formed as a curved surface, thereby offsetting the deformation generated during the assembly and operation of the inverter structure, thus forming a flat surface. Finally, the heat generated from the power module 400 is received through surface contact, and the heat is discharged through the radiator 10, which has the effect of significantly improving the efficiency of the water-cooling system.

[0065] This application is not intended to limit the technical solutions provided; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power module heat sink, characterized by, It includes a heat dissipation structure, which has a curved surface structure that corresponds to the deformation area of ​​the corresponding power module (400).

2. The power module heat sink of claim 1, wherein, The heat dissipation structure includes at least one cooling pin (11) and a pin cover, wherein the cooling pin (11) is disposed on the pin cover; coolant can flow through the cooling pin (11) on the pin cover.

3. The power module heat sink of claim 2, wherein, The top of the cooling pin (11) is a curved structure that protrudes outward.

4. The power module heat sink of claim 2, wherein, The pin cover has a curved surface structure.

5. The power module heat sink of claim 2, wherein, The pin cover includes a first pin cover (21) and a second pin cover. The first end of the cooling pin (11) is connected to the first pin cover (21), and the second end of the cooling pin (11) is connected to the second pin cover.

6. The power module heat sink of claim 2, wherein, The pin cover is provided with a coolant inlet and a coolant outlet.

7. The power module heat sink of claim 6, wherein, The cross-sectional shape of the cooling pin (11) is elliptical or rhomboid.

8. The power module heat sink of claim 7, wherein, When the cross-sectional shape of the cooling pin (11) is rhomboid, one of the sharp corners of the rhombus is positioned opposite to the coolant inlet.

9. The power module heat sink according to claim 2, characterized in that, When the number of cooling pins (11) is set to multiple, the multiple cooling pins (11) are arranged in at least one row; when the multiple cooling pins (11) are arranged in two or more rows, the two rows of cooling pins (11) are arranged alternately.

10. The power module heat sink according to claim 1, characterized in that, The heat dissipation structure includes a first heat dissipation structure and a second heat dissipation structure (120) stacked on top of each other, the first heat dissipation structure and the second heat dissipation structure (120); the second heat dissipation structure (120) is used to install the power module (400).

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