Heat dissipation structure of power device in power type controller

Abstract

The utility model discloses a heat dissipation structure of power devices in a power type controller, which comprises a shell and a control panel arranged in the shell, the control panel comprises a printed circuit board, and at least one edge of the printed circuit board is provided with a row of power devices; an insulating heat transfer piece is arranged between the metal bottom face of each row of power devices and the corresponding heat dissipation face on the shell, each row of power devices is sequentially provided with a buffering soft rubber strip and a pressing piece, and the pressing piece is provided with a plurality of pressing through holes in the length direction. Compression through holes corresponding to the compression through holes in the pressing piece are formed in the buffer soft rubber strip and the insulation heat transfer piece respectively, compression installation holes corresponding to the compression through holes in the pressing piece in a one-to-one mode are formed in the shell, and in each row of power devices, an avoiding gap is formed between every two adjacent power devices close to the corresponding compression installation holes. The heat dissipation structure of the power device can be widely applied to various power type controllers such as an electric vehicle controller and the like.

Description

Technical Field

[0001] The utility model relates to a power type controller, in particular to a heat dissipation structure of a power device in the power type controller. Background Art

[0002] At present, the control board of some high-power controllers such as high-power electric vehicle controllers is usually provided with two rows of power MOS tubes, and the two rows of power MOS tubes are usually made to press against the shell during the installation of the shell and the bottom plate. In actual use, due to reasons such as assembly accuracy, it is impossible to ensure that the power MOS tubes in all controllers are reliably pressed against the shell, which affects the heat dissipation of the power MOS tubes. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a heat dissipation structure of a power device in a power type controller which can reliably press the power device against a shell.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a heat dissipation structure of power devices in a power type controller, comprising: a shell and a control board arranged in the shell, the control board comprising: a printed circuit board, a row of power devices is arranged on at least one side of the printed circuit board, the metal bottom surface of the power device faces the shell and exceeds the corresponding side of the printed circuit board; the shell is provided with a heat dissipation surface corresponding to the bottom surface of the corresponding row of power devices, an insulating heat transfer member is arranged between the metal bottom surface of each row of power devices and the corresponding heat dissipation surface of the shell, each row of power devices is sequentially provided with a buffer soft rubber strip and a pressing sheet, at least two pressing through holes are opened on the pressing sheet along the length direction, and the buffer soft rubber strip and the insulating heat transfer member are respectively provided with pressing through holes corresponding to the pressing through holes on the pressing sheet. The shell is provided with clamping and mounting holes corresponding to the clamping through holes on the pressing sheet one by one. In each row of power devices, an avoidance gap is set between two adjacent power devices near the corresponding clamping and mounting holes. Screws are selected to pass through the clamping through holes on the pressing sheet, the corresponding clamping through holes on the buffer soft rubber strip and the corresponding clamping through holes on the insulating heat transfer component in sequence, and are screwed into the corresponding clamping and mounting holes on the shell. Alternatively, screws are selected to pass through the clamping through holes at the upper end of the pressing sheet and the corresponding clamping through holes on the insulating heat transfer component, and are screwed into the corresponding clamping and mounting holes on the shell. Then, screws are selected to pass through the clamping through holes on the pressing sheet corresponding to the avoidance gap, the corresponding clamping through holes on the buffer soft rubber strip and the corresponding clamping through holes on the insulating heat transfer component in sequence, and are screwed into the corresponding clamping and mounting holes on the shell.

[0005] As a preferred solution, in the heat dissipation structure of the power device in the power type controller, the pressing sheet is provided with folded edges arranged along the length direction on both sides of the pressing sheet in the width direction.

[0006] As a preferred solution, in the heat dissipation structure of the power device in the power type controller, the buffer soft rubber strip is downwardly provided with a positioning protrusion corresponding to the avoidance gap on at least one side in the width direction thereof.

[0007] As a preferred solution, in the heat dissipation structure of the power device in the power type controller, the buffer soft rubber strip is provided with limiting protrusions downward at both ends in its length direction.

[0008] As a preferred solution, in the heat dissipation structure of the power device in the power type controller, the insulating heat transfer element is an insulating pad or an aluminum substrate.

[0009] As a preferred solution, in the heat dissipation structure of the power device in the power type controller, the clamping vias on the insulating heat transfer member are oblong holes arranged along the width direction.

[0010] As a preferred solution, in the heat dissipation structure of the power device in the power type controller, a plurality of heat dissipation fins are arranged on the shell.

[0011] As a preferred solution, in the heat dissipation structure of the power device in the power type controller, the power device is a power MOS tube.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model directly locks the power device on the housing by sequentially setting the buffer soft rubber strip and the pressing sheet on the power device, thereby ensuring that the power device can dissipate heat reliably through the housing.

[0014] 2. The utility model greatly increases the strength of the pressing sheet and ensures its straightness by arranging folded edges on both sides of the pressing sheet in the width direction, making its contact with all power devices more reliable, so that all power devices can be closely attached to the heat dissipation surface of the shell through the insulating heat transfer parts.

[0015] 3. The utility model provides a positioning protrusion corresponding to the avoidance gap downwardly on at least one side in the width direction of the buffer soft rubber strip, and provides limit protrusions downwardly on both ends in the length direction of the buffer soft rubber strip, so that the positions of the buffer soft rubber strip and the power devices are relatively fixed, thereby ensuring reliable contact between all power devices and the buffer soft rubber strip.

[0016] 4. The utility model sets the clamping holes on the insulating heat transfer component as oblong holes arranged along the width direction, ensuring that the bolts pass through the clamping holes on the insulating heat transfer component and are screwed into the clamping mounting holes on the shell, thereby greatly facilitating the installation of the control panel.

[0017] 5. The utility model further improves the heat dissipation effect of the shell by arranging a plurality of heat dissipation fins on the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the power type controller of the utility model.

[0019] Figure 2 It is a schematic diagram of the exploded structure of the power type controller of the utility model from one perspective.

[0020] Figure 3 It is a schematic diagram of the partial explosion structure of the power type controller of the utility model from another perspective.

[0021] Figures 1 to 3 The reference numerals in the figure are: 1, first protective cover, 2, second protective cover, 3, housing, 30, annular sealing groove, 31, first installation window, 32, second installation window, 33, third installation window, 34, fourth installation window, 35, fifth installation window, 361, third protective cover, 37, seventh installation window, 38, eighth installation window, 39, ninth installation window, 310, heat dissipation fin, 311, heat dissipation surface, 312, pressing installation hole, 4, control board, 40, printing Circuit board, 42, second terminal block, 44, third terminal block, 44, fourth terminal block, 45, fifth terminal block, 46, first connector, 47, second connector, 48, third connector, 49, fourth connector, 410, power MOS tube, 5, aluminum substrate, 51, oblong clamping via, 6, pressing sheet, 60, folding edge, 61, clamping through hole, 7, buffer soft rubber strip, 71, clamping via, 72, positioning protrusion, 73, limiting protrusion, 8, insulating bracket, 9, bottom plate. DETAILED DESCRIPTION

[0022] The specific implementation scheme of the heat dissipation structure of the power device in the power type controller of the utility model is described in detail below with reference to the accompanying drawings.

[0023] like Figures 1 to 3As shown, the heat dissipation structure of a power device in a power type controller described in the utility model comprises: a housing 3, and a control board 4 arranged in the housing 3, the control board 4 comprises: a printed circuit board 40, a row of power MOS tubes 410 are respectively arranged on two opposite sides of the printed circuit board 40, the metal bottom surfaces of all the power MOS tubes 410 face the housing 3 and exceed the corresponding sides of the printed circuit board 40; the housing 3 is provided with a heat dissipation surface 311 corresponding to the bottom surface of the corresponding row of power MOS tubes 410, and each row of power MO An aluminum substrate 5 as an insulating heat transfer member is arranged between the metal bottom surface of the S tube 410 and the corresponding heat dissipation surface 311 of the shell 3. A buffer soft rubber strip 7 and a pressing sheet 6 are arranged in sequence on each row of power MOS tubes 410. The pressing sheet 6 is respectively provided with folding edges 60 arranged along the length direction on both sides of its width direction. Four pressing through holes 61 are opened on the pressing sheet 6 along the length direction. The buffer soft rubber strip 7 is downwardly provided with a positioning protrusion 72 corresponding to the avoidance gap on at least one side of its width direction. The buffer soft rubber strip 7 is provided with a positioning protrusion 72 corresponding to the avoidance gap on the bottom of the buffer soft rubber strip 7 on the length direction. The two ends are respectively provided with limited protrusions 73 downward, the buffer soft rubber strip 7 is also provided with a pressing hole 71 corresponding to the pressing hole 61 on the pressing sheet 6, the aluminum substrate 5 is provided with an oblong pressing hole 51 corresponding to the pressing hole 61 on the pressing sheet 6, and the housing 3 is provided with pressing installation holes 312 corresponding to the pressing holes 61 on the pressing sheet 6. In each row of power MOS tubes 410, an avoidance space is provided between two adjacent power MOS tubes 410 near the corresponding oblong pressing hole 51. A screw is selected to pass through the clamping through hole 61 at the upper end of the pressing plate 6 and the corresponding oblong clamping through hole 51 on the aluminum substrate 5, and is screwed into the corresponding clamping mounting hole 312 on the shell 3. Then a screw is selected to pass through the clamping through holes 61 (the two middle clamping through holes 61) on the pressing plate 6 corresponding to the avoidance gap, the corresponding clamping through holes 71 on the buffer soft rubber strip 7 and the corresponding oblong clamping through holes 51 on the aluminum substrate 5 in sequence, and is screwed into the corresponding clamping mounting holes 312 on the shell 3. The shell 3 is provided with a plurality of heat dissipation fins 310.

[0024] In practical applications, the insulating heat transfer element may also be various insulating pads; Figure 3 As shown, the mounting surface of the housing 3 is provided with an annular sealing groove 30 for dispensing glue; Figure 2As shown, the control board 4 also includes: a first terminal block, a second terminal block 42, a third terminal block 43, a fourth terminal block 44, a fifth terminal block 45, a first connector 46, a second connector 47, a third connector 48 and a fourth connector 49 arranged on the printed circuit board 40, and correspondingly, the housing 3 is provided with a first installation window 31 corresponding to the first terminal block, a second installation window 32 corresponding to the second terminal block 42, a third installation window 33 corresponding to the third terminal block 43, a fourth installation window 34 corresponding to the fourth terminal block 44, and a fifth terminal block 45, the fifth installation window 35 corresponding to the first connector 46, the sixth installation window corresponding to the second connector 47, the eighth installation window 38 corresponding to the third connector 48, and the ninth installation window 39 corresponding to the fourth connector 49; the first wiring seat, the second wiring seat 42, the third wiring seat 43, the fourth wiring seat 44, the fifth wiring seat 45, the first connector 46, the second connector 47, the third connector 48 and the fourth connector 49 are respectively provided with sealing rings (which belong to the conventional technology in this field and will not be described in detail here). During assembly, the insulating bracket 8 is placed under the printed circuit board 40, and then the bottom plate 9 is placed on the housing 3.

[0025] In actual use, a third protective cover 361 is provided in the sixth installation window, the first installation window 31 and the second installation window 32 share the first protective cover 1, and the third installation window 33, the fourth installation window 34 and the fifth installation window 35 share the second protective cover 2; unless the first protective cover 1 and the second protective cover 2 need to be removed during wiring, under normal circumstances, the first protective cover 1, the second protective cover 2 and the third protective cover 361 should be covered.

[0026] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made to the shape, structure, characteristics and spirit described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A heat dissipation structure of a power device in a power type controller, comprising: A shell, and a control board arranged in the shell, characterized in that the control board comprises: a printed circuit board, a row of power devices is arranged on at least one side of the printed circuit board, the metal bottom surface of the power device faces the shell and exceeds the corresponding side of the printed circuit board; a heat dissipation surface corresponding to the bottom surface of the corresponding row of power devices is arranged on the shell, an insulating heat transfer member is arranged between the metal bottom surface of each row of power devices and the corresponding heat dissipation surface of the shell, a buffer soft rubber strip and a pressing sheet are arranged on each row of power devices in turn, at least two pressing through holes are opened on the pressing sheet along the length direction, the buffer soft rubber strip and the insulating heat transfer member are respectively opened with pressing through holes corresponding to the pressing through holes on the pressing sheet, and the shell is opened with a pressing through hole corresponding to the pressing through hole on the pressing sheet. The holes are clamping and mounting holes corresponding to each other. In each row of power devices, an avoidance gap is set between two adjacent power devices near the corresponding clamping and mounting holes. Screws are selected to pass through the clamping through holes on the pressing plate, the corresponding clamping through holes on the buffer soft rubber strip and the corresponding clamping through holes on the insulating heat transfer component in sequence, and are screwed into the corresponding clamping and mounting holes on the shell. Alternatively, screws are selected to pass through the clamping through holes at the upper end of the pressing plate and the corresponding clamping through holes on the insulating heat transfer component, and are screwed into the corresponding clamping and mounting holes on the shell. Then, screws are selected to pass through the clamping through holes on the pressing plate corresponding to the avoidance gap, the corresponding clamping through holes on the buffer soft rubber strip and the corresponding clamping through holes on the insulating heat transfer component in sequence, and are screwed into the corresponding clamping and mounting holes on the shell.

2. The heat dissipation structure of a power device in a power type controller according to claim 1, characterized in that: The pressing sheet is provided with folded edges arranged along the length direction on both sides of the pressing sheet in the width direction.

3. The heat dissipation structure of a power device in a power type controller according to claim 1, characterized in that: The buffer soft rubber strip is provided with a positioning protrusion corresponding to the avoidance gap downward on at least one side in the width direction thereof.

4. The heat dissipation structure of a power device in a power type controller according to claim 2, characterized in that: The buffer soft rubber strip is provided with limited position protrusions downwards at both ends in the length direction thereof.

5. The heat dissipation structure of a power device in a power type controller according to claim 1, characterized in that: The insulating heat transfer element is an insulating pad or an aluminum substrate.

6. The heat dissipation structure of a power device in a power type controller according to claim 1, characterized in that: The pressing holes on the insulating heat transfer component are oblong holes arranged along the width direction.

7. A heat dissipation structure for a power device in a power type controller according to any one of claims 1 to 6, characterized in that: A plurality of heat dissipation fins are arranged on the shell.

8. A heat dissipation structure for a power device in a power type controller according to any one of claims 1 to 6, characterized in that: The power device is a power MOS tube.

9. The heat dissipation structure of a power device in a power type controller according to claim 7, characterized in that: The power device is a power MOS tube.

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