Power module, power module assembly and electronic equipment

Abstract

The utility model provides a power module, a power module assembly and electronic equipment, the power module comprises a substrate, a plurality of electronic devices and a packaging main body, and the plurality of electronic devices are installed on a first surface of the substrate; the packaging main body is arranged on the first surface of the substrate and covers the plurality of electronic devices; at least part of the first surface of the substrate is exposed out of the packaging body to form an abutting area, and a first positioning part is arranged in the abutting area. The power module assembly comprises a shell, a power module and a connecting piece, a second positioning part is arranged on the first surface of the connecting piece, at least part of the connecting piece abuts against the abutting area, and the first positioning part is connected with the second positioning part; a first fixing hole is formed in the connecting piece, and the fastening piece penetrates through the first fixing hole and then is connected with the shell. According to the invention, the connector and the shell can be prevented from moving during locking, the assembly tolerance requirement of the connector and the power module is reduced, the normal assembly of the power module is ensured, and the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic component manufacturing, in particular to a power module, a power module assembly and an electronic device. BACKGROUND

[0002] The power module is a module formed by pouring a plurality of electronic devices according to certain functions, and is widely used in various electronic devices.

[0003] In the related art, the power module can be locked in the shell of the electronic device. Specifically, the power module can be connected with the shell through a connecting piece, one side of the connecting piece abuts on the power module, and the connecting piece is further provided with a fixing hole, and a fastener is connected with the shell after passing through the fixing hole.

[0004] However, when the fastener is locked with the shell by using the above scheme, the connecting piece may be moved, thereby affecting the assembly of the power module. CONTENT OF THE UTILITY MODEL

[0005] In order to overcome the above defects in the related art, the purpose of the present application is to provide a power module, a power module assembly and an electronic device, which is beneficial to reduce the assembly tolerance requirement of the connecting piece and the power module, avoid the movement of the connecting piece when being locked with the shell, and is beneficial to ensure the normal assembly of the power module and improve the assembly efficiency.

[0006] In one aspect, the present application provides a power module, comprising:

[0007] a substrate;

[0008] a plurality of electronic devices, the plurality of electronic devices are mounted on a first surface of the substrate;

[0009] a packaging body, the packaging body is arranged on the first surface of the substrate and covers the plurality of electronic devices; at least part of the first surface of the substrate is exposed outside the packaging body to form an abutting area, and the abutting area is provided with a first positioning part.

[0010] In one possible implementation, the first positioning part comprises a positioning hole.

[0011] In one possible implementation, the positioning hole comprises a through hole or a blind hole.

[0012] In one possible implementation, at least two first positioning parts are arranged in the abutting area.

[0013] In one possible implementation, two abutting areas are arranged on the first surface of the substrate, and the two abutting areas are respectively close to opposite sides of the substrate.

[0014] In another aspect, the application provides a power module assembly, comprising:

[0015] a housing;

[0016] at least one power module as described in any of the above, disposed in the housing;

[0017] at least one connecting piece, a second positioning portion being disposed on a first surface of the connecting piece, at least a portion of the connecting piece abutting against the abutting area, and the first positioning portion being connected with the second positioning portion; a first fixing hole being disposed in the connecting piece, and a fastener being connected with the housing after passing through the first fixing hole.

[0018] In a possible implementation, the housing comprises at least one mounting slot, at least two fixing slots, and two support portions, the two fixing slots being respectively disposed on opposite sides of the mounting slot, the two support portions being respectively disposed on opposite sides of the mounting slot and located on a side of the fixing slot away from the mounting slot, and a third positioning portion being disposed in the support portion;

[0019] the power module being disposed in the mounting slot, the power module comprising a substrate, two abutting areas being disposed on a first surface of the substrate, and the two abutting areas being respectively close to opposite sides of the substrate;

[0020] further comprising at least two connecting pieces, the two connecting pieces being respectively connected with the two fixing slots through the fastener; one end of the connecting piece abutting against the abutting area, and the first positioning portion located on the one end of the connecting piece being connected with the second positioning portion; the other end of the connecting piece abutting against the support portion, and the first positioning portion located on the other end of the connecting piece being connected with the third positioning portion.

[0021] In a possible implementation, the housing is provided with a plurality of mounting slots, a plurality of power modules are respectively disposed in the plurality of mounting slots, and the connecting piece is disposed between two adjacent power modules.

[0022] In a possible implementation, the first positioning portion and the third positioning portion each comprise a positioning hole, and the second positioning portion comprises a positioning protrusion.

[0023] In a possible implementation, a support column is further disposed on the first surface of the connecting piece, the support column being disposed close to the first fixing hole and abutting against the fixing slot.

[0024] In a possible implementation, a shielding piece is further included, and a second fixing hole is disposed on the shielding piece.

[0025] A fixing post is provided on the second surface of the connector, and the connector is connected to the shielding component after passing through the second fixing hole via the fixing post.

[0026] In another aspect, this application provides an electronic device including any of the power module components described above.

[0027] This application provides a power module, a power module assembly, and an electronic device. The power module includes a substrate, multiple electronic devices, and a packaging body. The multiple electronic devices are mounted on a first surface of the substrate. The packaging body is disposed on the first surface of the substrate and covers the multiple electronic devices. At least a portion of the first surface of the substrate is exposed outside the packaging body to form an abutment area, and a first positioning portion is provided within the abutment area. The power module assembly includes a housing, a power module, and a connector. A second positioning portion is provided on the first surface of the connector. At least a portion of the connector abuts against the abutment area, and the first positioning portion is connected to the second positioning portion. A first fixing hole is provided within the connector, and a fastener passes through the first fixing hole and connects to the housing. This application achieves relative positioning between the connector and the power module by providing a first positioning portion within the abutment area of ​​the power module and a second positioning portion on the connector. When the connector abuts against the abutment area, the first positioning portion connects to the second positioning portion, thereby preventing movement of the connector when it is locked to the housing, reducing the assembly tolerance requirements of the connector and the power module, ensuring proper assembly of the power module, and improving assembly efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A top view of a power module provided in an embodiment of this application;

[0030] Figure 2 for Figure 1 AA section view;

[0031] Figure 3 A bottom view of a power module provided in an embodiment of this application;

[0032] Figure 4 A simplified structural diagram of a power module assembly provided in an embodiment of this application;

[0033] Figure 5 A top view of a power module assembly provided in an embodiment of this application;

[0034] Figure 6 FIG. 3 is a B-B sectional view of the power module according to an embodiment of the present application; Figure 5 FIG. 4 is a B-B sectional view of the power module according to an embodiment of the present application;

[0035] Figure 7 FIG. 5 is a structural diagram of a shell according to an embodiment of the present application;

[0036] Figure 8 FIG. 6 is a structural diagram of a connecting piece according to an embodiment of the present application;

[0037] Figure 9 FIG. 7 is a structural diagram of a connecting piece according to an embodiment of the present application.

[0038] Reference signs:

[0039] 100 - power module; 110 - substrate; 111 - abutting region; 112 - first positioning part; 113 - sealing region; 120 - package body; 130 - connecting terminal;

[0040] 200 - shell; 210 - mounting groove; 220 - fixing groove; 221 - locking hole; 230 - supporting part;

[0041] 300 - connecting piece; 310 - second positioning part; 320 - first fixing hole; 330 - supporting column; 340 - fixing column;

[0042] 400 - shielding piece. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0044] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0045] As described in the background, when the fastener is locked with the shell in the related art solution, the connecting piece can be moved, thereby affecting the assembly of the power module. Specifically, the connecting piece needs to be abutted to the power module first, and then the fastener is locked with the shell by passing through the fixing hole on the connecting piece. When the fastener is locked, the force is applied to the connecting piece, and the connecting piece can be moved (displaced or rotated) relative to the power module, thereby affecting the stability of the abutment of the connecting piece and the power module and affecting the assembly of the power module.

[0046] Therefore, the embodiment of the present application aims to provide a power module, a power module assembly and an electronic device. The first positioning part is arranged in the abutting area on the power module substrate, the second positioning part is arranged on the connecting piece, the first positioning part is connected with the second positioning part when the connecting piece abuts to the abutting area, thereby realizing the relative positioning of the connecting piece and the power module, avoiding the movement of the connecting piece when it is locked with the shell, reducing the assembly tolerance requirement of the connecting piece and the power module, being beneficial to guarantee the normal assembly of the power module and improving the assembly efficiency.

[0047] The content of the embodiment of the present application will be described in detail below with reference to the drawings, so that those skilled in the art can understand the content of the present application in more detail.

[0048] Please refer to Figures 1-3 The embodiment provides a power module 100, which comprises:

[0049] The substrate 110 may, for example, comprise a circuit board and the like.

[0050] A plurality of electronic devices (not shown in the figure) are mounted on the first surface of the substrate 110, and the type of the electronic devices can be selected according to the function of the power module 100.

[0051] The packaging body 120 is arranged on the first surface of the substrate 110 and covers the plurality of electronic devices; that is, the packaging body 120 encapsulates the plurality of electronic devices on the first surface of the substrate 110 to avoid the exposure of the electronic devices. At least part of the first surface of the substrate 110 is exposed outside the packaging body 120 to form an abutting area 111. It can be understood that the abutting area 111 is the area on the first surface of the substrate 110 which is not covered by the packaging body 120. The first positioning part 112 is arranged in the abutting area 111, and the first positioning part 112 is used to be connected with the second positioning part on the connecting piece, thereby realizing the relative positioning of the connecting piece and the power module 100, improving the stability of the abutting of the connecting piece and the power module 100, avoiding the movement of the connecting piece when it is locked, reducing the assembly tolerance requirement of the connecting piece and the power module 100, being beneficial to guarantee the normal assembly of the power module 100 and improving the assembly efficiency.

[0052] Please continue to refer to Figure 2 In the embodiment, the first positioning part 112 comprises a positioning hole, which can be formed on the substrate 110 by a drilling process.

[0053] Exemplarily, the positioning hole can comprise a through hole or a blind hole. As Figure 3As shown, the second surface of the substrate 110 is fully exposed and is used for sealing the power module 100 to the housing and for cooling the power module 100. A sealing region 113 is formed on the second surface of the substrate 110. When the positioning hole is a through hole, the positioning hole is located outside the sealing region 113 to avoid affecting the sealing performance. When the positioning hole is a blind hole, since it does not penetrate the substrate 110, the positioning hole can be located inside or outside the sealing region 113.

[0054] In this embodiment, at least two first positioning parts 112 are provided in the same abutment area 111, and correspondingly, at least two second positioning parts are provided on the connector. This allows the connector and the power module 100 to have at least two connection positions after the connector abuts against the abutment area 111, thereby improving the stability of the positioning of the connector and the power module 100, preventing movement during the locking of the connector, reducing the assembly tolerance requirements of the connector and the power module 100, and helping to ensure the normal assembly of the power module 100 and improve assembly efficiency.

[0055] Please continue to refer to Figure 1 In this embodiment, at least two first positioning parts 112 are provided within the same contact area 111, and the two first positioning parts 112 are respectively close to the contact area 111. Figure 1 Set at both ends in the vertical direction.

[0056] Further, please continue to refer to Figure 1 In this embodiment, two abutment regions 111 are provided on the first surface of the substrate 110, and the two abutment regions 111 are respectively close to opposite sides of the substrate 110. Figure 1 It can be seen that the two contact areas 111 are located on the substrate 110 respectively. Figure 1 On both sides in the horizontal direction. By providing two abutment areas 111, two connectors can be used to abut against the two abutment areas 111 of the substrate 110 respectively, and then the two connectors can be locked to the housing respectively, thereby improving the stability of the connection between the power module 100 and the housing. Preferably, the two abutment areas 111 in this embodiment can be symmetrically arranged with respect to the center of the first surface of the substrate 110.

[0057] Please continue to refer to Figure 1 In this embodiment, the substrate 110 is provided with a plurality of connection terminals 130 at both ends along the vertical direction. A part of the connection terminal 130 is covered by the encapsulation body 120, and the other part of the connection terminal 130 is exposed outside the encapsulation body 120 to realize the connection with other external circuits.

[0058] Please continue to refer to Figures 4-9 This embodiment also provides a power module assembly, including:

[0059] The shell 200, for example, can be a housing of a cooling device in an electronic device.

[0060] The at least one power module 100 is arranged in the shell 200 to exchange heat with the shell 200 to achieve heat dissipation.

[0061] The at least one connecting piece 300 is provided with a second positioning part 310 on a first surface thereof, and the at least part of the connecting piece 300 abuts against the abutting area 111, and the first positioning part 112 is connected with the second positioning part 310. The connecting piece 300 is provided with a first fixing hole 320, which penetrates through the connecting piece 300, and a fastener is connected with the shell 200 after penetrating through the first fixing hole 320. The fastener can be a bolt or a screw, etc.

[0062] It can be understood that, by arranging the first positioning part 112 in the abutting area 111 of the power module 100 and arranging the second positioning part 310 on the connecting piece 300, when the connecting piece 300 abuts against the abutting area 111, the first positioning part 112 is connected with the second positioning part 310, so that the relative positioning of the connecting piece 300 and the power module 100 is realized, the stability of the abutment of the connecting piece 300 and the power module 100 is improved, the movement of the connecting piece 300 when being locked with the shell 200 is avoided, the assembly tolerance requirement of the connecting piece 300 and the power module 100 is reduced, the normal assembly of the power module 100 is facilitated, and the assembly efficiency is improved.

[0063] Please continue to refer to Figure 7 The shell 200 of the embodiment comprises at least one mounting groove 210, at least two fixing grooves 220, and two supporting parts 230. The two fixing grooves 220 are respectively arranged on opposite sides of the mounting groove 210, and the bottom wall of the fixing groove 220 is formed with a locking hole 221. The two supporting parts 230 are respectively arranged on opposite sides of the mounting groove 210 and are located on a side of the fixing groove 220 away from the mounting groove 210. The supporting part 230 is provided with a third positioning part (not shown in the figure).

[0064] Please continue to refer to Figure 4 and Figure 6 The power module 100 of the embodiment is arranged in the mounting groove 210, and the first surface of the substrate 110 is located outside the mounting groove 210. The first surface of the substrate 110 is provided with two abutting areas 111, and the two abutting areas 111 are respectively close to opposite sides of the substrate 110.

[0065] The power module assembly further comprises at least two connecting pieces 300, and the at least two connecting pieces 300 correspond to the at least two fixing grooves 220 one by one. As Figure 6As shown, when the shell 200 comprises one mounting groove 210, two fixing grooves 220 and two supporting portions 230, the power module assembly comprises two connecting pieces 300, which are connected with the two fixing grooves 220 respectively by fasteners. Specifically, the fasteners are fixedly connected with the locking holes 221 in the fixing grooves 220 after passing through the first fixing holes 320 on the connecting pieces 300. One end of the connecting piece 300 abuts against the abutting area 111 to press the power module 100 tightly; and the first positioning portion 112 at the one end of the connecting piece 300 is connected with the second positioning portion 310 on the abutting area 111 to realize the relative positioning of the connecting piece 300 and the power module 100, avoiding the movement of the connecting piece 300 and the power module 100. The other end of the connecting piece 300 abuts against the supporting portion 230, and the first positioning portion 112 at the other end of the connecting piece 300 is connected with the third positioning portion of the supporting portion 230 to realize the relative positioning of the connecting piece 300 and the supporting portion 230, avoiding the movement of the connecting piece 300 and the supporting portion 230. Through the above structure, the two connecting pieces 300 can be used to lock the power module 100 in the shell 200 firmly.

[0066] Further, the shell 200 of the embodiment can be provided with a plurality of mounting grooves 210, and the fixing groove 220 is arranged between the adjacent two mounting grooves 210. The plurality of power modules 100 are arranged in the plurality of mounting grooves 210 respectively, and the connecting piece 300 is arranged between the adjacent two power modules 100.

[0067] In combination with the above description of the locking structure of the power module assembly comprising one power module 100, when the power module assembly has a plurality of power modules 100, the adjacent two power modules 100 are connected by one connecting piece 300, that is, one end of the connecting piece 300 abuts against the abutting area 111 of one power module 100, and the first positioning portion 112 at the one end of the connecting piece 300 is connected with the second positioning portion 310 on the abutting area 111. The other end of the connecting piece 300 abuts against the abutting area 111 of another power module 100, and the first positioning portion 112 at the other end of the connecting piece 300 is connected with the second positioning portion 310 on the abutting area 111. Finally, the connecting piece 300 is locked with the corresponding fixing groove 220. The two abutting areas 111 at the outermost sides of the plurality of power modules 100 are locked with the shell 200 by one connecting piece 300 and the shell 200, and the locking structure is the same as the above locking structure of one power module 100, which will not be described herein again.

[0068] It can be understood that when the power module assembly includes N power modules 100, N+1 connecting pieces 300 can be used to lock the N power modules 100 on the shell 200, thereby facilitating the improvement of the power density of the electronic device.

[0069] In combination Figure 2 and Figure 8 It can be seen that the first positioning part 112 and the third positioning part of the embodiment each include a positioning hole, and the second positioning part 310 includes a positioning protrusion. The connecting piece 300 can be inserted into the corresponding positioning hole through the positioning protrusion to achieve relative positioning with the power module 100 or the support part 230, thereby avoiding movement of the connecting piece 300 when locking the fastener.

[0070] In the embodiment, two first positioning parts 112 are arranged in the same abutting region 111, and two third positioning parts are arranged in the same support part 230. Correspondingly, four second positioning parts 310 are arranged on the same connecting piece 300, and the four second positioning parts 310 correspond to the two first positioning parts 112 and the two third positioning parts, respectively.

[0071] Please continue to refer to Figure 7 and Figure 8 The first surface of the connecting piece 300 of the embodiment is further provided with a support column 330, the support column 330 is arranged close to the first fixing hole 320 and abuts in the fixing groove 220. Exemplarily, the first surface of the connecting piece 300 of the embodiment is provided with two support columns 330, the two support columns 330 are respectively located on the two sides of the first fixing hole 320, the shape of the support column 330 is matched with the shape of the fixing groove 220, and the support column 330 can be limited by the side wall of the fixing groove 220 after abutting to the bottom wall of the fixing groove 220. It can be understood that the support column 330 can provide support for the connecting piece 300, so that the connecting piece 300 is not easy to deform after being locked to the shell 200, and the connecting piece 300 can stably press the power module 100.

[0072] Please continue to refer to Figure 4 , Figure 5 , Figure 6 and Figure 9 The power module assembly of the embodiment further includes a shielding piece 400, and the shielding piece 400 is provided with a second fixing hole (not shown in the figure).

[0073] The second surface of the connecting piece 300 is provided with a fixing column 340, and the connecting piece 300 is connected with the shielding piece 400 through the fixing column 340 after passing through the second fixing hole.

[0074] Exemplarily, the fixing column 340 can be a rivet column. After the rivet column passes through the corresponding second fixing hole, the rivet column is pressed by a pressure head to cause deformation of the rivet column, so as to clamp the shielding member 400, thereby realizing the connection between the connecting member 300 and the shielding member 400. The shielding member 400 can be a metal plate for example, and the shielding member 400 shields the power module 100 to provide electromagnetic shielding.

[0075] The embodiment also provides an electronic device including the power module assembly.

[0076] Specifically, the electronic device can be an inverter, a power supply or the like. Since the power module assembly is adopted, the electronic device has a high power density, and the power module can be stably locked with the shell of the electronic device, and the assembly efficiency is high.

[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0078] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0079] It should be noted that in the description of the present application, the terms "first", "second" are only used for the convenience of describing different parts, and cannot be understood as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0080] The embodiments or implementation manners in the present application are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0081] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power module, characterized by The power module comprises: a substrate; a plurality of electronic devices, each of which is mounted on a first surface of the substrate; a package body arranged on the first surface of the substrate and covering the plurality of electronic devices; at least part of the first surface of the substrate is exposed outside the package body to form an abutting area, and a first positioning part is arranged in the abutting area.

2. The power module of claim 1, wherein, The first positioning part comprises a positioning hole.

3. The power module of claim 2, wherein, The positioning hole comprises a through hole or a blind hole.

4. The power module of claim 1, wherein, At least two first positioning parts are arranged in the abutting area.

5. The power module of any one of claims 1-4, wherein, Two abutting areas are arranged on the first surface of the substrate, and the two abutting areas are respectively close to opposite sides of the substrate.

6. A power module assembly characterized by, The power module assembly comprises: a housing; at least one power module as claimed in any one of claims 1-5, which is arranged in the housing; at least one connecting piece, a second positioning part is arranged on a first surface of the connecting piece, at least part of the connecting piece abuts on the abutting area, and the first positioning part is connected with the second positioning part; a first fixing hole is arranged in the connecting piece, and a fastener is connected with the housing after passing through the first fixing hole.

7. The power module assembly of claim 6, wherein, The housing comprises at least one mounting groove, at least two fixing grooves and two support parts, the two fixing grooves are respectively arranged on opposite sides of the mounting groove, the two support parts are respectively arranged on opposite sides of the mounting groove and located on a side of the fixing groove away from the mounting groove, and a third positioning part is arranged in the support part; The power module is arranged in the mounting groove, and the power module comprises a substrate, two abutting areas are arranged on a first surface of the substrate, and the two abutting areas are respectively close to opposite sides of the substrate; The power module assembly further comprises at least two connecting pieces, the two connecting pieces are respectively connected with the two fixing grooves through the fastener; one end of the connecting piece abuts on the abutting area, and the first positioning part located at the one end of the connecting piece is connected with the second positioning part; the other end of the connecting piece abuts on the support part, and the first positioning part located at the other end of the connecting piece is connected with the third positioning part.

8. The power module assembly of claim 7, wherein, The housing is provided with a plurality of mounting grooves, a plurality of power modules are respectively arranged in the plurality of mounting grooves, and the connecting piece is arranged between adjacent two power modules.

9. The power module assembly of claim 7, wherein, The first positioning part and the third positioning part each comprise a positioning hole, and the second positioning part comprises a positioning protrusion.

10. The power module assembly of claim 7, wherein, A support column is further arranged on the first surface of the connecting piece, the support column is arranged close to the first fixing hole and abuts in the fixing groove.

11. The power module assembly according to any one of claims 6-10, further comprising: a shielding piece, a second fixing hole is arranged on the shielding piece; a fixing column is arranged on a second surface of the connecting piece, and the connecting piece is connected with the shielding piece after passing through the second fixing hole through the fixing column.

12. An electronic device, comprising: The power module assembly comprises the power module assembly as claimed in any one of claims 6-11.

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