Encapsulation housing and encapsulation module

Abstract

This utility model relates to the field of semiconductor manufacturing technology, and provides a potting shell and a potting module. The potting shell includes an outer shell body and a first functional component. The outer shell body includes a plate and a baffle. A potting cavity is formed through the plate along a direction perpendicular to its first side surface. The baffle is disposed on the first side surface and surrounds the potting cavity. A process hole is formed through the plate along a direction perpendicular to the first side surface. The first functional component is disposed on the first side surface and blocks the space between the potting cavity and the process hole. The first functional component is connected to the outer side surface of the baffle. Along the direction perpendicular to the first side surface, the end of the first functional component away from the first functional component is designated as the first end, and the edge of the first end is provided with a stress-relieving guiding slope. By improving the potting shell, the structural strength of its functional component is increased, thereby reducing the risk of impact damage to the functional component.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor manufacturing technology, and in particular to a potting shell and potting module. Background Technology

[0002] Encapsulation is an important part of semiconductor processing. Encapsulation is the process of injecting liquid composite encapsulation material into devices containing electronic components and circuits, and then curing it at room temperature or under heating conditions to form a high-performance thermosetting polymer insulating material.

[0003] A potting module is a device used to perform the potting process, in which electronic components are loaded into the potting cavity and potting material is injected into the cavity. The potting housing typically has functional components that enable features such as snap-fitting, increased creepage distance, or other functionalities.

[0004] In existing potting modules, some functional components on the housing are in the form of thin sheets. These components are relatively weak and are prone to damage from collisions with other parts during the potting process, which affects the service life of the potting module.

[0005] Therefore, this utility model provides a potting shell and a potting module, which improves the structural strength of its functional components by modifying the potting shell. Utility Model Content

[0006] The purpose of this utility model is to provide a potting shell and a potting module. By improving the potting shell, the structural strength of its functional components is improved, thereby reducing the risk of collision damage to the functional components.

[0007] This utility model provides a potting shell, comprising: an outer shell body and a first functional component;

[0008] The outer shell body includes a plate and a retaining edge. A potting cavity is formed through the plate in a direction perpendicular to its first side surface. The retaining edge is disposed on the first side surface and surrounds the potting cavity. A process hole is formed through the plate in a direction perpendicular to the first side surface. A first functional component is disposed on the first side surface and blocks the space between the potting cavity and the process hole. The first functional component is connected to the outer side surface of the retaining edge. In a direction perpendicular to the first side surface, the end of the first functional component away from the first side surface is designated as the first end. The edge of the first end is provided with a force-relieving guide slope.

[0009] The potting shell of the above-described structure has a flange connected to the first functional component. This flange serves two purposes: firstly, it provides support to the first functional component, reducing its deformation under external forces and mitigating damage caused by excessive deformation; secondly, it strengthens the localized thickening of the first functional component, improving its overall structural strength and rigidity, thereby reducing the probability of damage from external forces. Furthermore, the first functional component is equipped with a force-dissipating guide ramp, which helps to dissipate force during impacts, optimizing the forces acting on the first functional component during collisions and mitigating collision damage.

[0010] The reinforced structure formed by connecting the first functional component with the retaining edge, along with the unloading structure of the unloading guide slope, can optimize the force during collision to reduce the impact on the first functional component. It can also strengthen the first functional component itself, improve its structural strength and rigidity, and enable the first functional component to withstand greater collision impact, effectively reducing the probability of damage to the first functional component during collision and improving the service life of the power module.

[0011] Optionally, the first functional component partially surrounds the process hole. The first end has a first end face and a stress-relieving guide slope. The first end face is parallel to the first side face, and the stress-relieving guide slope connects to the two circumferential edges of the first end face and forms an angle with it. This stress-relieving guide slope is similar to a chamfer structure, making the two upper edges of the first functional component smoother. This serves two purposes: firstly, it relieves stress; secondly, it eliminates sharp right angles at the upper edges of the first functional component, preventing stress concentration caused by sharp edges and reducing the risk of damage at the edges.

[0012] Optionally, the first functional component includes a blocking body and a reinforcing portion. The blocking body is disposed on the first side and blocks the space between the potting cavity and the process hole. The blocking body is connected to the outer side of the retaining edge. The reinforcing portion fills the transition connection between the blocking body and the retaining edge and is connected to both the blocking body and the retaining edge. Filling the transition connection between the blocking body and the retaining edge with the reinforcing portion can prevent stress concentration at local connection points and also increases the local thickness of the blocking body to ensure superior structural strength and rigidity of the first functional component.

[0013] Optionally, the reinforcing part is connected to the blocking body with a circular arc transition, and the reinforcing part is connected to the stop edge with a circular arc transition. This allows for a smooth transition between the blocking body and the stop edge, improving the local stress concentration at the connection point and helping to reduce damage and cracking at the connection.

[0014] Optionally, the blocking body includes a thick part and a thin part, the thickness of the thick part is greater than the thickness of the thin part, the thick part and the thin part are arranged in a direction perpendicular to the first side and connected end to end, and the thick part is connected to the first side.

[0015] Optionally, along a direction perpendicular to the first side, from the direction closer to the first side to the direction farther away from the first side, the thickness of the thick portion gradually decreases, and the minimum thickness of the thick portion is greater than the thickness of the thin portion.

[0016] Optionally, the thick portion is connected to the outer side of the retaining edge, and the reinforcing portion is connected at the transition connection between the thick portion and the retaining edge.

[0017] This utility model also provides a potting module, including the potting shell and cover plate described above, wherein the cover plate covers the outer shell body.

[0018] Optionally, the potting housing further includes a second functional component disposed on the inner wall of the potting cavity, the inner wall of the potting cavity being provided with a boss; along a direction perpendicular to the first side, there is a predetermined distance between the second functional component and the boss, and the edge of the cover plate is engaged between the second functional component and the boss. The aforementioned potting housing forms a protruding second functional component within its potting cavity, and cooperates with the boss to form a snap-fit ​​structure. Compared to the existing T-shaped hook structure, the snap-fit ​​structure formed by the second functional component and the boss has superior structural strength and can improve the damage caused during the engagement process.

[0019] Optionally, the cover plate has a recessed area on one side of its edge in a direction perpendicular to the first side, and the edge of the cover plate is fitted between the second functional component and the boss at the location of the recessed area.

[0020] And / or, a guide slope is provided on the side of the second functional component near the center of the filling cavity, and the guide slope is configured to be inclined towards the side near the center of the filling cavity along a direction perpendicular to the first side surface from away from the boss to near the boss.

[0021] In summary, the potting housing includes: an outer shell body and a first functional component; the outer shell body includes a plate and a retaining edge, the plate body has a potting cavity extending through it in a direction perpendicular to its first side surface, the retaining edge is disposed on the first side surface and surrounds the potting cavity; the plate body has a process hole extending through it in a direction perpendicular to the first side surface, the first functional component is disposed on the first side surface and blocks the space between the potting cavity and the process hole, the first functional component is connected to the outer side surface of the retaining edge; along the direction perpendicular to the first side surface, the end of the first functional component away from the first functional component is the first end, and the edge of the first end is provided with a stress-relieving guide slope.

[0022] In this configuration, the potting shell of the aforementioned structure, with its flange connected to the first functional component, serves two purposes: firstly, to provide support for the first functional component, reducing its deformation under external forces and mitigating damage caused by excessive deformation; and secondly, to strengthen the localized thickening of the first functional component, thereby increasing its overall structural strength and rigidity, and further reducing the probability of damage from external forces. Furthermore, the first functional component is equipped with a force-dissipating guide ramp, which helps to dissipate force upon impact, optimizing the forces acting on the first functional component during collision and mitigating collision damage.

[0023] The reinforced structure formed by connecting the first functional component with the retaining edge, along with the unloading structure of the unloading guide slope, can optimize the force during collision to reduce the impact on the first functional component. It can also strengthen the first functional component itself, improve its structural strength and rigidity, and enable the first functional component to withstand greater collision impact, effectively reducing the probability of damage to the first functional component during collision and improving the service life of the power module. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a potting shell according to an embodiment of the present invention;

[0025] Figure 2 This is a partial structural diagram of the potting shell according to an embodiment of the present invention. Figure 1 ;

[0026] Figure 3 This is a partial structural diagram of the potting shell according to an embodiment of the present invention. Figure 2 ;

[0027] Figure 4 This is a partial structural diagram of the potting shell according to an embodiment of the present invention. Figure 3 ;

[0028] Figure 5 This is a schematic diagram of the structure of the cover body according to an embodiment of the present invention;

[0029] Figure 6 This is a side view of the cover structure according to an embodiment of the present invention;

[0030] Figure 7 This is a partial structural diagram of the cover and the potting shell after they are fitted together according to an embodiment of the present invention.

[0031] In the attached diagram:

[0032] 100 - Potting housing;

[0033] 10-Outer shell body; 11-Plate body; 12-Baffle; 13-First side; 14-Pouring cavity; 15-Process hole; 16-Boss; 17-Groove; 18-Through groove;

[0034] 20-First functional component; 201-First end face; 202-Force relief guide slope; 21-Blocking body; 211-Thick part; 212-Thin part; 22-Reinforcing part;

[0035] 30 - Second functional component; 31 - Guide slope;

[0036] 200-cover plate;

[0037] 40 - Depression area;

[0038] 50-Protruding structure;

[0039] 60-convex ridge;

[0040] a - First direction; b - Second direction; c - Third direction. Detailed Implementation

[0041] The potting shell and potting module proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0042] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the terms “at least two” or “more than” are generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. Furthermore, the terms "installed," "connected," and "attached," as used in this utility model, and the term "set" on one element from another, should be interpreted broadly. They generally only indicate a connection, coupling, cooperation, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. They should not be construed as indicating or implying a spatial positional relationship between the two elements, meaning one element can be located inside, outside, above, below, or to one side of the other element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances. Additionally, directional terms such as above, below, up, down, upward, downward, left, and right are used relative to exemplary embodiments as shown in the figures, with upward or up direction pointing towards the top of the corresponding figure, and downward or down direction pointing towards the bottom of the corresponding figure.

[0043] In existing potting modules, some functional components on the housing are integrally sheet-like structures. For example, components used to increase creepage distance and clearance are typically thin-plate structures. Similarly, the latching structure for fixing the cover plate is a T-shaped hook structure, also formed from a bent thin plate. These functional components are relatively weak and are easily damaged (e.g., broken) by collisions with other components during the potting process. For instance, during the assembly of the potting module components, or during the installation or removal of the power module, collisions with components that increase step voltage and clearance can easily cause damage. Similarly, during the assembly of the housing and cover plate, collisions with the T-shaped hook can easily cause localized damage (e.g., breakage), affecting the service life of the potting module.

[0044] This embodiment provides a potting housing 100, which includes: an outer shell body 10 and a first functional component 20.

[0045] The outer shell body 10 includes a plate 11 and a flange 12;

[0046] Combination Figure 1As shown, in this embodiment, the outer contour of the plate 11 is generally rectangular. The first direction a corresponds to the height direction of the plate 11, the second direction b corresponds to the width direction of the plate 11, and the third direction c corresponds to the length direction of the plate 11. The first direction a, the second direction b, and the third direction c are all perpendicular to each other. During normal potting, the plate 11 should be positioned such that the first direction a corresponds to the vertical direction.

[0047] Figure 1 In the middle, the upper side of the plate 11 serves as the first side 13 of the plate 11. The plate 11 is provided with a potting cavity 14 through a direction perpendicular to its first side 13 (first direction a), so that the plate 11 has a hollow structure. The potting cavity 14 is used to install the power module and inject potting material to perform the potting process.

[0048] Please continue to refer to this. Figure 1 As shown, the retaining edge 12 is disposed on the first side 13 and surrounds the potting cavity 14. The retaining edge 12 is configured as a rectangular frame structure, the shape of the retaining edge 12 is adapted to the shape of the potting cavity 14, and the inner wall of the retaining edge 12 is coplanar with the inner wall of the potting cavity 14. In essence, the inner wall of the retaining edge 12 is part of the inner wall of the potting cavity 14 to increase the height of the potting cavity 14. The retaining edge 12 is provided to meet the space requirements during the installation of the cover plate (the specific installation method of the cover plate is described in detail below).

[0049] Please continue to refer to this. Figure 1 As shown, the plate 11 has a process hole 15 along the direction perpendicular to the first side 13 (first direction a), and the process hole 15 serves as a space to accommodate the screws for installing the heat sink.

[0050] During the potting process, the cover plate 200 covers the top of the housing body 10 and blocks the upper opening of the potting cavity 14, while the bottom plate is connected to the bottom of the housing body 10 and blocks the lower opening of the potting cavity 14. Electronic components and other structures are installed in the potting cavity 14. Since the bottom plate is usually a metal plate, the power module may short-circuit with the bottom plate through the process hole 15 along the flange 12 and the upper surface (first side 13) of the plate body 11.

[0051] Therefore, in this embodiment, a first functional component 20 is provided, which is used to increase the creepage distance and electrical clearance between the electronic components and the base plate in the potting cavity 14.

[0052] Combination Figure 1As shown, the first functional component 20 is disposed on the first side 13 and blocks the space between the potting cavity 14 and the process hole 15. The height of the first functional component 20 (the dimension along the first direction a) is greater than the height of the retaining edge 12 (the dimension along the first direction a). The arrangement of the first functional component 20 can extend the path during breakdown, thereby increasing the creepage distance and electrical clearance between the power module and the base plate.

[0053] The first functional component 20 has a plate structure and is perpendicular to the upper surface (first side 13) of the plate 11.

[0054] The side of the first functional component 20 opposite to the process hole 15 is connected to the outer side of the retaining edge 12, and the first functional component 20 and the retaining edge 12 are integrally formed. The first functional component 20 and the retaining edge 12 form a connecting structure, which serves to support the first functional component 20, reduce the deformation of the first functional component 20 under external force, and improve the damage caused by excessive deformation of the first functional component 20. At the same time, the retaining edge 12 also strengthens the local thickening of the first functional component 20, thereby improving the overall structural strength and rigidity of the first functional component 20, and thus reducing the probability of damage to the first functional component 20 caused by external force.

[0055] Please continue to refer to this. Figure 1 As shown, along a direction perpendicular to the first side surface 13 (first direction a), the end of the first functional member 20 away from the first side surface 13 ( Figure 1 The upper end of the first functional component 20 is the first end, and the first end ( Figure 1 The upper end of the first functional component 20 has a first end face 201 and a force-relieving guide slope 202. The first end face 201 is parallel to the first side face 13. The force-relieving guide slope 202 is connected to the two circumferential edges of the first end face 201 and is set at an angle to the first end face.

[0056] In this embodiment, the force-relieving guide ramp 202 is an inclined planar structure disposed on the upper end of the first functional component 20. The force-relieving guide ramp 202 is used to relieve force when the first functional component 20 is subjected to collision, thereby optimizing the force on the first functional component 20 during collision and improving the phenomenon of collision damage to the first functional component 20.

[0057] In other alternative embodiments, the unloading guide ramp 202 may also be a downwardly curved surface structure. The shape of the unloading guide ramp 202 and its specific location can be set based on actual needs. Preferably, the unloading guide ramp 202 is located at the first end of the first functional member 20. Figure 1 The upper part of the first functional component 20 is located at a position with a higher probability of collision.

[0058] In the potting shell structure described above, the first functional component 20 is connected to the retaining edge 12. This serves two purposes: firstly, it provides support for the first functional component 20, reducing its deformation under external forces and mitigating damage caused by excessive deformation; secondly, the retaining edge 12 reinforces the localized thickening of the first functional component 20, improving its overall structural strength and rigidity, thereby reducing the probability of damage caused by external forces. Furthermore, the first functional component 20 is equipped with a force-dissipating guide ramp 202, which helps to dissipate force during impacts, optimizing the forces acting on the first functional component 20 during collisions and mitigating collision damage.

[0059] The reinforced structure formed by connecting the first functional component 20 with the retaining edge 12, along with the unloading structure of the unloading guide slope 202, can optimize the force during collision, thereby reducing the impact on the first functional component 20. It can also strengthen the first functional component 20 itself, improving its structural strength and rigidity, enabling the first functional component 20 to withstand greater collision impact, effectively reducing the probability of damage to the first functional component 20 during collision, and improving the service life of the power module.

[0060] The aforementioned outer shell 10 and the first functional component 20 are integrally formed, and both are made of conventional packaging module materials, such as polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), or polyamide fiber (PA).

[0061] In this embodiment, the filling cavity 14 is a rectangular chamber, and its four sidewalls are parallel to the four sides of the plate 11. In other alternative embodiments, the outer contour of the plate 11 can be square, hexagonal, or other shapes, and the filling cavity 14 can be square, hexagonal, or other shapes. The outer contour shape of the plate 11 and the shape of the filling cavity 14 can be adjusted adaptively based on the filling requirements.

[0062] In this embodiment, the retaining edge 12 is configured as a rectangular frame structure to adapt to the shape of the potting cavity 14. In other alternative embodiments, the shape of the retaining edge 12 can be adjusted based on the shape of the potting cavity 14 and the installation requirements of the cover plate.

[0063] In this embodiment, four process holes 15 are provided at the four corners of the plate 11, and the four process holes 15 correspond to the four corners of the retaining edge 12. Correspondingly, four first functional components 20 are provided on the plate 11, and the four first functional components 20 respectively block the four process holes 15 and the potting cavity 14.

[0064] Please continue to refer to this. Figure 1 and Figure 2 As shown, the first functional component 20 partially surrounds the process hole 15. The upper end (first end) of the first functional component 20 is parallel to the first side surface 13. The stress-relieving guide slope 202 is provided at the two circumferential edges of the upper end (first end) of the first functional component 20. The stress-relieving guide slope 202 is similar to a chamfer structure, so that the two edges of the upper end of the first functional component 20 are relatively smooth. On the one hand, it can relieve stress, and on the other hand, it removes the sharp right angles at the upper edge of the first functional component 20, prevents stress concentration caused by local sharpness, and reduces the risk of damage at the edge.

[0065] In this embodiment, the process hole 15 is a circular hole structure, so the first functional component 20 is adapted to be a tile-shaped structure. The inner circumferential surface of the first functional component 20 is coplanar with the inner wall of the process hole 15. The outer circumferential surface of the first functional component 20 is an arc-shaped surface, which can also play a role in relieving stress and can prevent stress concentration caused by local sharpness.

[0066] In other alternative embodiments, for example, if the process hole 15 is a square hole structure, the first functional element 20 can be configured as an approximately "U"-shaped structure surrounding the process hole 15, or the first functional element 20 can also be configured as a flat plate structure. The shape of the first functional element 20 can be set based on the specific opening shape of the process hole 15 and the creepage distance requirements, which will not be elaborated here.

[0067] Furthermore, the first functional component 20 includes a blocking body 21 and a reinforcing part 22. The blocking body 21 is disposed on the first side 13 and blocks between the potting cavity 14 and the process hole 15. The blocking body 21 is connected to the outer side of the baffle 12. The reinforcing part 22 fills the transition connection between the blocking body 21 and the baffle 12 and is connected to the blocking body 21 and the baffle 12.

[0068] Combination Figure 2 and Figure 3 As shown, the blocking body 21 has a tile-like structure, and the reinforcing part 22 is connected to the back of the blocking body 21.

[0069] like Figure 3 As shown, if the blocking body 21 is not filled, the transition connection between the outer peripheral surface of the first functional member 20 and the stop 12 has a sharp triangular area. Figure 3 The blue area in the diagram is prone to local stress concentration. The reinforcing part 22 fills this triangular area, which can prevent stress concentration at local connection points and also increases the local thickness of the blocking body 21 to ensure the superior structural strength and rigidity of the first functional component 20.

[0070] In this embodiment, the blocking body 21, the reinforcing part 22 and the baffle 12 are integrally formed to ensure the superior mechanical properties of the first functional component 20.

[0071] In this embodiment, the reinforcing part 22 is connected to the blocking body 21 via an arc transition, and the reinforcing part 22 is also connected to the stop edge 12 via an arc transition. This allows for a smooth transition between the blocking body 21 and the stop edge 12, thereby reducing local stress concentration at the connection point and helping to mitigate damage and cracking at the connection.

[0072] Please continue to refer to this. Figure 2 and Figure 3 As shown, the blocking body 21 includes a thick portion 211 and a thin portion 212. The thickness of the thick portion 211 is greater than the thickness of the thin portion 212. Here, the thickness refers to the dimension of the thick portion 211 and the thin portion 212 along their own radial direction. The thick portion 211 and the thin portion 212 are arranged in a direction perpendicular to the first side surface 13 (first direction a) and connected end to end. The thick portion 211 and the thin portion 212 are integrally formed. The thick portion 211 is connected to the first side surface 13, and the force-relieving guide slope 202 is disposed at the upper end of the thin portion 212.

[0073] Both the thick part 211 and the thin part 212 have a tile-like structure. The inner circumferential surface of the thick part 211 and the inner circumferential surface of the thin part 212 are coplanar and coplanar with the inner circumferential surface of the process hole 15. The outer circumferential surface of the thick part 211 and the outer circumferential surface of the thin part 212 have a height difference.

[0074] By setting the blocking body 21 in the thick part 211 and the thin part 212 structure, and connecting the thick part 211 to the first side 13, the blocking body 21 and the plate 11 can be guaranteed to have better connection strength. Moreover, the thick part 211 serves as the foundation of the blocking body 21, which helps to ensure the overall structural strength and rigidity of the blocking body 21.

[0075] Combination Figure 2 As shown, along the direction perpendicular to the first side 13 (first direction a), from the direction closer to the first side 13 to the direction farther away from the first side 13 ( Figure 2 From bottom to top, the thickness of the thick portion 211 gradually decreases, and the minimum thickness of the thick portion 211 is greater than the thickness of the thin portion 212. The use of a gradually varying thickness in the thick portion 211 ensures superior mechanical properties and also provides a larger connection area between the thick portion 211 and the first side surface 13, thereby guaranteeing superior connection strength.

[0076] In this embodiment, the thick portion 211 is connected to the outer surface of the retaining edge 12, and the reinforcing portion 22 is connected to the transition connection between the thick portion 211 and the retaining edge 12. In other alternative embodiments, both the thick portion 211 and the thin portion 212 can be connected to the outer surface of the retaining edge 12. In this case, a portion of the reinforcing portion 22 is connected to the transition connection between the thick portion 211 and the retaining edge 12, and the other portion of the reinforcing portion 22 is connected to the transition connection between the thin portion 212 and the retaining edge 12.

[0077] In this embodiment, a potting module is also provided, including the potting housing 100 and the cover plate 200 described above. The cover plate 200 covers the housing body 10 and blocks one open end of the potting cavity 14.

[0078] In this embodiment, the cover plate 200 conformally covers the filling cavity 14 and blocks the upper opening end of the filling cavity 14.

[0079] Combination Figure 1 and Figure 4 As shown, the potting housing 100 also includes a second functional component 30, which is disposed on the inner wall of the potting cavity 14, and the inner wall of the potting cavity 14 is provided with a boss 16.

[0080] Along a direction perpendicular to the first side 13 (first direction a), the second functional member 30 and the boss 16 have a set distance.

[0081] like Figure 5 and Figure 6 As shown, the cover plate 200 has a plate structure, and the shape of the cover plate 200 is adapted to the shape of the filling cavity 14.

[0082] The cover plate 200 conforms to the filling cavity 14. (Connection) Figure 7 As shown, the edge of the cover plate 200 is engaged between the second functional component 30 and the boss 16.

[0083] The lower surface of the cover plate 200 at its edge is supported by the boss 16, and the upper surface of the cover plate 200 at its edge is attached to the lower surface of the second functional component 30 to fix the cover plate 200.

[0084] Combination Figure 1 As shown, in this embodiment, four second functional components 30 are respectively provided on the four side walls of the potting cavity 14, and bosses 16 are respectively provided on the four side walls of the potting cavity 14. Therefore, the potting cavity 14 has a snap-fit ​​structure composed of the second functional components 30 and the bosses 16 on each side wall. Thus, the four edges of the cover plate 200 are fixed by four sets of snap-fit ​​structures to ensure the stability of the cover plate 200 when it is placed on the potting housing 100.

[0085] In this embodiment, the second functional component 30 is integrally formed with the outer shell body 10, and the material of the second functional component 30 and the outer shell body 10 is the same. Both the second functional component 30 and the boss 16 are block structures.

[0086] The aforementioned potting housing 100 has a protruding second functional element 30 formed within its potting cavity 14, which, together with the boss 16, forms a snap-fit ​​structure. Compared to the existing T-shaped snap-fit ​​structure, the snap-fit ​​structure formed by the second functional element 30 and the boss 16 has superior structural strength and can improve the damage caused during the snap-fit ​​process.

[0087] Please refer to Figures 5 to 7 As shown, in this embodiment, the cover plate 200 is located on one side of the direction perpendicular to the first side surface 13. Figure 7 A recessed area 40 is provided at the edge of the upper side of the cover plate 200, and the edge of the cover plate 200 is located at the position of the recessed area 40 and is fitted between the second functional component 30 and the boss 16.

[0088] Combination Figure 6 As shown, the upper surface of the cover plate 200 has a recessed area 40, and the corresponding lower surface of the cover plate 200 adaptively protrudes downward to form a protruding structure 50.

[0089] like Figure 4 As shown, the protruding structure 50 adapted to the lower surface of the cover plate 200 has a groove 17 on the upper surface of the boss 16 corresponding to the position of the second functional component 30. The shape of the groove 17 is adapted to the shape of the protruding structure 50 on the lower surface of the cover plate 200.

[0090] Combination Figure 7 As shown, the surface of the recessed area 40 of the cover plate 200 is attached to the lower surface of the second functional component 30, and the protruding structure 50 of the cover plate 200 conformally fits the groove 17.

[0091] In addition, such as Figure 4 As shown, a through groove 18 is formed in the middle of the groove 17, which causes the boss 16 to be disconnected at the middle position of the groove 17. The above structure can be used to reduce the contact area between the bottom of the groove 17 and the bottom of the protruding structure 50, so as to reduce the assembly accuracy requirements of the two and reduce the manufacturing cost.

[0092] In this embodiment, the groove 17 is configured as a trapezoidal groove, and the protruding structure 50 is a trapezoidal structure adapted to the shape of the groove 17. In other alternative embodiments, the groove 17 may be configured as a rectangular groove or a groove of other shapes, and the protruding structure 50 may be adjusted based on the shape of the groove 17.

[0093] The configuration of the groove 17 and the protrusion 50 facilitates the positioning of the cover plate 200 during installation, and the protrusion 50 itself also serves as a reinforcing structure to improve the structural strength and torsional stiffness of the cover plate 200.

[0094] Combination Figure 7 As shown, in this embodiment, the second functional component 30 is a long strip-shaped block structure. A guide slope 31 is provided on the side of the second functional component 30 near the center of the potting cavity 14. The guide slope 31 is configured such that it extends perpendicularly to the first side surface 13 from away from the boss 16 towards the boss 16. Figure 7 From top to bottom, the guide slope 31 is inclined towards the center of the potting cavity 14. That is, the second functional component 30 has a structure that is thinner at the top and thicker at the bottom, and the upper end of the second functional component 30 has an acute angle, making the cross-section of the second functional component 30 a trapezoid with a smaller upper base. The guide slope 31 guides the edge of the cover plate 200 to slide downwards between the second functional component 30 and the boss 16, fitting against the guide slope 31.

[0095] During the installation of the cover plate 200, the cover plate 200 is pressed down, causing its edge to slide downwards along the guide ramp 31. During this downward movement, the cover plate 200 exerts force on the guide ramp 31, which is transmitted to the retaining edge 12, causing it to expand and deform outwards until the edge of the cover plate 200 slides between the second functional component 30 and the boss 16. Then, the retaining edge 12 springs back to its original position, thus completing the installation of the cover plate 200. The guide ramp 31 serves to guide the installation of the cover plate 200 and also acts as a stress-relieving surface to buffer the force applied to the second functional component 30, reducing the risk of damage to the second functional component 30.

[0096] In this embodiment, the first functional component 20 is used to increase the creepage distance and electrical clearance, and the second functional component 30 serves as a latch to secure the cover plate. In other alternative embodiments, the first functional component 20 and the second functional component 30 can be used for other purposes, and the specific purpose can be set based on actual usage requirements.

[0097] Combination Figure 5 and Figure 7 As shown, in this embodiment, a protruding ridge 60 is provided on the upper surface of the cover plate 200. The protruding ridge 60 slightly protrudes from the upper surface of the cover plate 200, extends along the width direction (second direction b) of the cover plate 200, and is located at the center position in the length direction (third direction c) of the cover plate 200, so as to strengthen the cover plate 200 as a whole. In addition, multiple through holes are formed on the cover plate 200 for the pins of power devices to pass through.

[0098] In addition, the potting module also includes a base plate. The base plate is located at the bottom of the housing body 10 to close the lower end of the potting cavity 14. Other structures of the power module are built into and positioned within the potting cavity 14. These other structures include, but are not limited to, chips and interconnect layers, leads, and substrates. The interconnect layers can be solder, sintered silver, or conductive adhesive, etc.; the leads can be aluminum wire, copper wire, gold wire, aluminum strip, copper strip, etc.; and the substrate can be DBC / AMB or other copper-clad insulating substrates. Potting material is injected into the potting cavity 14. The potting material can be, for example, silicone gel, epoxy resin, or other potting materials. A cover plate 200 is placed over the upper end of the housing body 10 to close the upper end of the potting cavity 14.

[0099] In summary, the potting housing 100 includes: an outer shell body 10 and a first functional component 20;

[0100] The outer shell body 10 includes a plate 11 and a retaining edge 12. A potting cavity 14 is formed through the plate 11 in a direction perpendicular to its first side surface 13. The retaining edge 12 is disposed on the first side surface 13 and surrounds the potting cavity 14. A process hole 15 is formed through the plate 11 in a direction perpendicular to the first side surface 13. A first functional component 20 is disposed on the first side surface 13 and blocks the space between the potting cavity 14 and the process hole 15. The first functional component 20 is connected to the outer side surface of the retaining edge 12. In a direction perpendicular to the first side surface 13, the end of the first functional component 20 away from the first side surface 13 is the first end, and the edge of the first end is provided with a force-relieving guide slope 202.

[0101] In this configuration, the potting shell of the above-mentioned structure, with the flange 12 connected to the first functional component 20, serves two purposes: firstly, to provide support for the first functional component 20, reducing its deformation under external forces and mitigating damage caused by excessive deformation; and secondly, to strengthen the local thickening of the first functional component 20, thereby improving its overall structural strength and rigidity, and further reducing the probability of damage caused by external forces. Furthermore, the first functional component 20 is equipped with a force-dissipating guide ramp 202, which helps to dissipate force during collisions, optimizing the forces acting on the first functional component 20 during impacts and mitigating collision damage.

[0102] The reinforced structure formed by connecting the first functional component 20 with the retaining edge 12, along with the unloading structure of the unloading guide slope 202, can optimize the force during collision, thereby reducing the impact on the first functional component 20. It can also strengthen the first functional component 20 itself, improving its structural strength and rigidity, enabling the first functional component 20 to withstand greater collision impact, effectively reducing the probability of damage to the first functional component 20 during collision, and improving the service life of the power module.

[0103] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0104] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A potting housing, characterized in that, include: The outer casing and the first functional component; The outer shell body includes a plate and a retaining edge. A potting cavity is formed through the plate along a direction perpendicular to its first side surface. The retaining edge is disposed on the first side surface and surrounds the potting cavity. A process hole is provided on the plate along a direction perpendicular to the first side. The first functional component is disposed on the first side and blocks the potting cavity and the process hole. The first functional component is connected to the outer side of the baffle. Along the direction perpendicular to the first side, the end of the first functional component away from the first side is the first end, and the edge of the first end is provided with a force-relieving guide slope.

2. The potted housing of claim 1, wherein, The first functional component partially surrounds the process hole. The first end has a first end face and a force-relieving guide slope. The first end face is parallel to the first side face. The force-relieving guide slope is connected to the two circumferential edges of the first end face and is set at an angle to the first end face.

3. The potted housing of claim 1, wherein, The first functional component includes a blocking body and a reinforcing part. The blocking body is disposed on the first side and blocks the filling cavity and the process hole. The blocking body is connected to the outer side of the baffle. The reinforcing part fills the transition connection between the blocking body and the baffle and is connected to the blocking body and the baffle.

4. The potted housing of claim 3, wherein, The reinforcing part is connected to the blocking body by an arc transition, and the reinforcing part is connected to the edge by an arc transition.

5. The potted housing of claim 3, wherein, The blocking body includes a thick part and a thin part, the thickness of the thick part is greater than the thickness of the thin part, the thick part and the thin part are arranged in a direction perpendicular to the first side and connected end to end, and the thick part is connected to the first side.

6. The potted housing of claim 5, wherein, Along a direction perpendicular to the first side, from near the first side to away from the first side, the thickness of the thick portion gradually decreases.

7. The potted housing of claim 5, wherein The thick portion is connected to the outer side of the retaining edge, and the reinforcing portion is connected at the transition connection between the thick portion and the retaining edge.

8. A potted module characterized by, It includes a potting housing and a cover plate as described in any one of claims 1 to 7, wherein the cover plate covers the housing body and blocks one open end of the potting cavity.

9. The potted module of claim 8, wherein, The potting housing also includes a second functional component, which is disposed on the inner wall of the potting cavity, and the inner wall of the potting cavity is provided with a boss; Along a direction perpendicular to the first side, there is a set distance between the second functional component and the boss, the cover plate is located in the potting cavity and the edge of the cover plate is engaged between the second functional component and the boss.

10. The potted module of claim 9, wherein, The cover plate has a recessed area on one side of its edge in a direction perpendicular to the first side, and the edge of the cover plate is located at the position of the recessed area and is fitted between the second functional component and the boss. And / or, a guide slope is provided on the side of the second functional component near the center of the filling cavity, and the guide slope is configured to be inclined towards the side near the center of the filling cavity along a direction perpendicular to the first side surface from away from the boss to near the boss.

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