Spring piece and IGBT (Insulated Gate Bipolar Translator) mounting structure

Abstract

The utility model belongs to the technical field of IGBT devices, and discloses a spring piece and an IGBT installation structure. The spring piece comprises a supporting part, a connecting part and a bending part, and the supporting part is supported below the to-be-installed device in the first direction. The connecting part is located below the supporting part in the first direction, is connected to one end of the supporting part at an angle and is used for being connected with an external structure to achieve fixation of the spring piece. The bending part is located above the supporting part in the first direction, the bending part is connected to the end, away from the connecting part, of the supporting part at an angle, and the bending part can abut against the to-be-installed device to the side wall of the external structure so that the to-be-installed device can be tightly attached to the external structure.

Description

Technical Field

[0001] The utility model relates to the technical field of IGBT devices, in particular to a spring sheet and an IGBT installation structure. Background Art

[0002] New energy vehicle technology has put forward the requirements of lightweight and miniaturization. Under this requirement, the PCB board area of ​​the all-in-one controller of the bus air conditioner is reduced accordingly, making the layout of electrical components more compact, so the heat dissipation of the insulated-gate bipolar transistor (IGBT) has become a focus of attention. As a key component that plays a control role on the PCB, IGBT generates heat when working. If the heat is not dissipated in time, it will cause the IGBT to become unstable, thereby reducing the operating reliability of the control system. Therefore, the heat dissipation problem of IGBT when working becomes particularly important.

[0003] In the prior art, the conventional assembly method of IGBT is to first weld the IGBT to the PCB, then install and fix the PCB, and under the pressing force of the PCB, the heat dissipation surface of the IGBT coated with thermal grease is closely attached to the heat sink. Since the vehicle control box shell is die-cast in one piece, if the conventional assembly method of IGBT is adopted, it is impossible to ensure that the heat dissipation surface of the IGBT is completely attached to the box wall, which will cause poor heat conduction and fail to achieve the cooling effect of the IGBT.

[0004] Therefore, there is an urgent need for a spring sheet and an IGBT mounting structure to solve the above problems. Utility Model Content

[0005] One purpose of the utility model is to provide a spring sheet that can effectively achieve compression and fitting of a device.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A spring sheet is provided, comprising:

[0008] A supporting portion, the supporting portion being supported below the device to be mounted in a first direction;

[0009] A connecting portion, the connecting portion is located below the supporting portion in the first direction, the connecting portion is connected to one end of the supporting portion at an angle, and the connecting portion is connected to an external structure;

[0010] A bending portion, wherein the bending portion is located above the supporting portion in the first direction, the bending portion is connected to an end of the supporting portion away from the connecting portion at an angle, and the top of the bending portion is pressed against the device to be mounted.

[0011] As an alternative to the spring piece, a first connection hole is provided in the connection part, and the first connection hole can be penetrated by an external connection piece.

[0012] As an alternative to the spring piece, the spring piece further includes an abutting part, the abutting part is located above the bending part in the first direction, the abutting part is angularly connected to the bending part, and the abutting part includes an abutting surface that abuts against the device to be installed.

[0013] As an alternative to the spring piece, the included angle between the bending part and the supporting part is 30°-60°.

[0014] As an alternative to the spring piece, the connection part is perpendicular to the supporting part.

[0015] Another object of the present invention is to provide an IGBT mounting structure that can improve the fitting degree between the IGBT and the housing, which is beneficial to the heat dissipation of the IGBT.

[0016] To achieve this purpose, the present invention adopts the following technical solutions: provide a spring piece, including an IGBT, a housing, and the spring piece according to any one of the claims. The surface of the connection part facing away from the supporting part abuts against the side wall of the housing. The IGBT is placed above the supporting part in the first direction, and the bending part presses the IGBT against the side wall of the housing.

[0017] As an alternative to the IGBT mounting structure, the bottom surface of the connection part abuts against the bottom wall of the housing.

[0018] As an alternative to the IGBT mounting structure, the IGBT mounting structure further includes a bolt and a nut. A first connection hole is provided in the connection part. The bolt passes through the first connection hole and the housing, and the nut is threadedly connected to the bolt.

[0019] As an alternative to the IGBT mounting structure, the IGBT mounting structure further includes a heat-conducting gasket, and the heat-conducting gasket is located above the supporting part in the first direction and between the IGBT and the housing.

[0020] As an alternative to the IGBT mounting structure, heat-conducting silicone grease is coated on both the first surface of the heat-conducting gasket that abuts against the IGBT and the second surface that abuts against the housing.

[0021] The beneficial effects of the present invention:

[0022] The present utility model provides a spring piece. The connecting portion can be connected to the side wall of an external structure to fix the spring piece. One end of the supporting portion is connected above the connecting portion and is angularly connected to the connecting portion. A device to be installed is placed above the supporting portion. The bending portion is angularly connected to the other end of the supporting portion. The bending portion can press the device to be installed against the side wall of the external structure, so that the device to be installed fits tightly against the external structure.

[0023] The present utility model also provides an IGBT installation structure, including an IGBT, a housing, and the above-mentioned spring piece. The spring piece can fix the IGBT to the side wall of the housing and make the IGBT closely adhere to the side wall of the housing, ensuring that the heat generated when the IGBT works can be quickly transferred to the housing and ensuring the heat dissipation effect of the IGBT. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the spring piece provided by the present utility model;

[0025] Figure 2 is a schematic structural diagram of the IGBT installation structure provided by the present utility model.

[0026] In the figure:

[0027] 1. Supporting portion; 2. Connecting portion; 21. First connection hole; 22. Connection surface; 3. Bending portion; 4. Contact portion; 41. Pressing surface;

[0028] 100. IGBT; 200. Housing; 300. Thermal conductive gasket; 310. First surface; 320. Second surface. Detailed Embodiment

[0029] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0030] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] As Figure 1 and Figure 2 shown, the spring piece of this embodiment includes a support portion 1, a connection portion 2 and a bending portion 3. The support portion 1 supports below the device to be installed in the first direction. The connection portion 2 is located below the support portion 1 in the first direction. The connection portion 2 is angularly connected to one end of the support portion 1 and is used for connecting to an external structure. The bending portion 3 is located above the support portion 1 in the first direction. The bending portion 3 is angularly connected to the end of the support portion 1 away from the connection portion 2, and the top of the bending portion 3 presses against the device to be installed. Wherein, the first direction is Figure 2 the X direction in

[0034] Based on the above design, the connection portion 2 can be connected to the side wall of the external structure to fix the spring piece, prevent displacement and rotation of the spring piece. One end of the support portion 1 is connected above the connection portion 2 and is angularly connected to the connection portion 2, and the device to be installed is placed above the support portion 1. The bending portion 3 is angularly connected to the other end of the support portion 1, and the bending portion 3 can press the device to be installed against the side wall of the external structure, so that the device to be installed fits closely with the external structure. This spring piece has a simple structure, is easy to install, and can be integrally formed by bending, with low manufacturing cost.

[0035] In this embodiment, the connection portion 2 includes a connection surface 22. The connection surface 22 fits against the external structure to ensure the contact area between the connection portion 2 and the external structure. The support portion 1 is perpendicular to the connection portion 2 to improve the stability of this spring piece and the device to be installed.

[0036] Preferably, the connecting portion 2 is provided with a first connecting hole 21 through which an external connecting member can pass, facilitating the connection between the connecting portion 2 and an external structure. Optionally, the center of the first connecting hole 21 is located at the center of the connecting portion 2, and the aperture is equal to 0.72 - 0.77 times the smaller of the height of the connecting portion 2 in the first direction and the width in the second direction, ensuring both the structural strength of the connecting portion 2 and the connection strength between the connecting portion 2 and the external structure. Herein, the second direction is Figure 1 the Y direction in

[0037] Optionally, multiple first connecting holes 21 can also be provided, and the multiple first connecting holes 21 are arranged at intervals from each other, further improving the connection strength and stability between the spring piece and the external structure.

[0038] To ensure the pressing effect, preferably, the included angle between the bending portion 3 and the supporting portion 1 is set to be 30° - 60°. Such a setting not only ensures that the bending portion 3 applies sufficient pressing force to the device to be installed, but also enables the distance between the top of the bending portion 3 and the supporting portion 1 in the first direction to be appropriate, ensuring the stability of the device. Exemplarily, the included angle between the bending portion 3 and the supporting portion 1 can be 30°, 40°, 45°, 50°, 60°, etc.

[0039] Furthermore, the spring piece further includes an abutting portion 4. The abutting portion 4 is located above the bending portion 3 in the first direction. The abutting portion 4 is angularly connected to the bending portion 3. The abutting portion 4 includes an abutting surface 41, and the abutting surface 41 abuts against the device to be installed. Such a setting can expand the abutting area between the spring piece and the device to be installed, improve the installation stability, and can avoid abrasion and scratching of the device by the top of the bending portion 3, ensuring the service life of the device.

[0040] Optionally, the spring piece is made of stainless steel. Stainless steel has advantages such as good anti-magnetization and corrosion resistance, and its uniform elastic properties are suitable for the installation and use of IGBTs with relatively small loads and deformations.

[0041] This embodiment also provides an IGBT installation structure, including an IGBT 100, a housing 200, and the above-mentioned spring piece. The surface of the connecting portion 2 facing away from the supporting portion 1 abuts against the side wall of the housing 200. The IGBT 100 is placed above the supporting portion 1 in the first direction. The bending portion 3 presses the IGBT 100 tightly against the side wall of the housing 200, ensuring that the heat generated when the IGBT 100 operates can be quickly transferred to the housing 200 and ensuring the heat dissipation effect of the IGBT 100.

[0042] Specifically, the IGBT mounting structure further includes a bolt and a nut. The connecting portion 2 is provided with a first connecting hole 21, and the housing 200 is provided with a second connecting hole. The bolt passes through the first connecting hole 21 and the second connecting hole, and the nut is threadedly connected to the bolt to clamp the spring piece to the housing 200. The mounting structure is simple and easy to operate.

[0043] Furthermore, the bottom surface of the connecting portion 2 can abut against the bottom wall of the housing 200 to improve the stability of the spring piece in the first direction.

[0044] Optionally, in the second direction, the width of the spring piece is set to be greater than or equal to the width of the IGBT 100, so that when the mounting position of the IGBT 100 is offset, the spring piece still has a large enough pressing force to enable the IGBT 100 to abut tightly against the housing 200.

[0045] Furthermore, the IGBT mounting structure further includes a heat-conducting gasket 300. The heat-conducting gasket 300 is located above the supporting portion 1 in the first direction and between the IGBT 100 and the housing 200. Through the heat-conducting gasket 300, when the surfaces of the IGBT or the housing 200 are uneven, the heat-conducting gasket 300 can fill the gap between the IGBT 100 and the housing 200, improving the stability of the IGBT 100 mounted in the IGBT mounting structure. Moreover, the heat-conducting gasket 300 has a high heat-conducting efficiency, which can accelerate the heat transfer speed from the IGBT 100 to the housing 200 and improve the heat transfer efficiency between the IGBT 100 and the housing 200. Exemplarily, the heat-conducting gasket 300 can adopt a silicone-based heat-conducting gasket, a carbon fiber heat-conducting gasket, a silica gel heat-conducting gasket, etc.

[0046] Optionally, heat-conducting silicone grease is coated on both the first surface 310 where the heat-conducting gasket 300 abuts against the IGBT 100 and the second surface 320 where the heat-conducting gasket 300 abuts against the housing 200. It can fill the gaps between the IGBT 100 and the first surface 310 and between the housing 200 and the second surface 320. Its heat-conducting efficiency is high, ensuring that the IGBT 100 can efficiently conduct heat to the housing 200, keeping the temperature transfer at a stable working level, preventing poor heat dissipation, and prolonging the service life.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A spring sheet, characterized in that: include: A support portion (1), the support portion (1) being supported below the device to be mounted in a first direction; A connecting portion (2), the connecting portion (2) being located below the supporting portion (1) in the first direction, the connecting portion (2) being connected to one end of the supporting portion (1) at an angle, and the connecting portion (2) being connected to an external structure; A bending portion (3), the bending portion (3) being located above the supporting portion (1) in the first direction, the bending portion (3) being connected at an angle to an end of the supporting portion (1) away from the connecting portion (2), and the top of the bending portion (3) being pressed against the device to be mounted.

2. The spring sheet according to claim 1, characterized in that: The connecting portion (2) is provided with a first connecting hole (21), and the first connecting hole (21) can be used for an external connecting piece to pass through.

3. The spring sheet according to claim 1, characterized in that: The spring sheet further comprises a contact portion (4), the contact portion (4) being located above the bent portion (3) in the first direction, the contact portion (4) being connected to the bent portion (3) at an angle, the contact portion (4) comprising a pressing surface (41), the pressing surface (41) pressing against the device to be mounted.

4. The spring sheet according to claim 1, characterized in that: The angle between the bending portion (3) and the supporting portion (1) is 30°-60°.

5. The spring sheet according to claim 1, characterized in that: The connecting portion (2) is perpendicular to the supporting portion (1).

6. An IGBT mounting structure, characterized in that: The invention comprises an IGBT (100), a shell (200) and a spring sheet according to any one of claims 1 to 5, wherein a side of the connecting portion (2) facing away from the supporting portion (1) abuts against a side wall of the shell (200), the IGBT (100) is placed above the supporting portion (1) in the first direction, and the bent portion (3) presses the IGBT (100) against the side wall of the shell (200).

7. The IGBT mounting structure according to claim 6, characterized in that: The bottom surface of the connecting portion (2) abuts against the bottom wall of the shell (200).

8. The IGBT mounting structure according to claim 6, characterized in that: The IGBT mounting structure further comprises a bolt and a nut, the connecting portion (2) is provided with a first connecting hole (21), the bolt is passed through the first connecting hole (21) and the housing (200), and the nut is threadedly connected to the bolt.

9. The IGBT mounting structure according to claim 6, characterized in that: The IGBT mounting structure further comprises a thermally conductive gasket (300), wherein the thermally conductive gasket (300) is located above the support portion (1) in the first direction and between the IGBT (100) and the housing (200).

10. The IGBT mounting structure according to claim 9, characterized in that: The first surface (310) of the thermally conductive gasket (300) abutting against the IGBT (100) and the second surface (320) abutting against the housing (200) are both coated with thermally conductive silicone grease.

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