Power module

Abstract

The utility model provides a power module. The power module comprises a circuit board and a housing. The shell comprises a mounting plate and an outer frame, the mounting plate and the outer frame are assembled and connected, a containing space is defined by the mounting plate and the outer frame, and the circuit board is welded to the mounting plate and contained in the containing space; the mounting plate is provided with a first positioning structure, the outer frame is provided with a second positioning structure, and the first positioning structure is connected to the second positioning structure. The mounting plate and the outer frame can be connected through the first positioning structure and the second positioning structure to realize positioning connection, so that positioning connection of the mounting plate and the outer frame is facilitated. Besides, only the circuit board needs to be positioned in the accommodating space, the circuit board can be welded on the mounting plate through an external positioning tool, and additional processing operations such as trepanning and the like do not need to be performed on the circuit board, so that the process is simplified. Moreover, the axial projection surface of the accommodating space can be larger than or equal to the area of the circuit board, so that the practicability of the shell can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrical drive element field, especially related to a power module. BACKGROUND

[0002] The power module has high frequency, high voltage, large current, easy switching and other excellent performance, as a high-power high-frequency switch is used in inverter, power converter, is the core device of industrial application field. The power module includes a shell and an assembly in the shell circuit board. In the related art, the shell includes the bottom shell, side shell and cover. The shell is positioned and connected by positioning structure during assembly. And, the related art also usually sets up a connecting column on the shell, so that the through hole and the connecting column are connected to realize the positioning and assembly connection of the circuit board and the shell.

[0003] However, this not only needs to process the original circuit board, causes the tedious process, but also needs to ensure that the through hole of the circuit board and the connecting column of the shell are one-to-one corresponding, that is, different shells need to be designed to match different circuit boards, so that the shell has limitations. UTILITY MODEL CONTENT

[0004] The technical purpose of the utility model is to provide a power module, which aims to solve the technical problems of the power module in the related art, such as complicated process and limited shell.

[0005] To solve the above technical problems, the utility model is realized in this way, a power module, including circuit board and shell, the shell includes mounting plate and outer frame, the mounting plate is assembled and connected with the outer frame, and the mounting plate and the outer frame are surrounded to form a receiving space, the circuit board is welded to the mounting plate and received in the receiving space, the mounting plate is provided with a first positioning structure, the outer frame is provided with a second positioning structure, the first positioning structure is connected to the second positioning structure.

[0006] Further, in some embodiments, the first positioning structure includes a clamping groove opened in the mounting plate, the second positioning structure includes a protruding rib protruding from the outer frame toward the mounting plate side, and the protruding rib is clamped in the clamping groove.

[0007] Further, in some embodiments, the first positioning structure includes a protruding rib protruding from the mounting plate toward the outer frame, the second positioning structure includes a clamping groove opened in the outer frame toward the mounting plate side, and the protruding rib is clamped in the clamping groove.

[0008] Further, in some embodiments, the first positioning structure comprises a positioning post protruding from the mounting plate and located outside the receiving space, and the second positioning structure comprises a through hole formed in the outer frame and located outside the receiving space, and the positioning post is arranged through the through hole.

[0009] Further, in some embodiments, the first positioning structure comprises a through hole formed in the mounting plate and located outside the receiving space, and the second positioning structure comprises a positioning post protruding from the outer frame and located outside the receiving space, and the positioning post is arranged through the through hole.

[0010] Further, in some embodiments, the mounting plate is further provided with a mounting structure located outside the receiving space, and the mounting structure is used for assembling and connecting with an external heat dissipation module.

[0011] Further, in some embodiments, the mounting plate is provided with a first assembling structure, and the outer frame is provided with a second assembling structure, and the first assembling structure is assembled and connected with the second assembling structure.

[0012] Further, in some embodiments, the first assembling structure comprises a screw through hole arranged on the mounting plate, the second assembling structure comprises a threaded hole arranged on a side of the outer frame facing the mounting plate, and the threaded hole and the screw through hole are assembled and connected by a screw.

[0013] Further, in some embodiments, the first assembling structure comprises a first through hole arranged on the mounting plate and located outside the receiving space, and the second assembling structure comprises a second through hole arranged on the outer frame and located outside the receiving space, and the first through hole and the second through hole are assembled and connected by a fastener.

[0014] Further, in some embodiments, the outer frame comprises a frame body and a cover body, the frame body is assembled and connected with the mounting plate and encloses a side of the circuit board, and the cover body is assembled and connected with the frame body and is arranged opposite to the mounting plate.

[0015] Further, in some embodiments, the frame body is provided with a buckle, and the cover body is formed with a buckle recess, and the buckle is assembled in the buckle recess.

[0016] Further, in some embodiments, the frame body is formed with a buckle recess, and the cover body is provided with a buckle, and the buckle is assembled and connected in the buckle recess.

[0017] Further, in some embodiments, the frame body is provided with a limiting rim, the cover body is provided with a flange and a boss adjacent to the flange, the flange abuts against the limiting rim, and the boss abuts against an inner side wall of the frame body.

[0018] The power module has the beneficial effects that, compared with the related art,

[0019] In the utility model, the shell includes the mounting plate and the outer frame, the mounting plate and the outer frame can be connected and positioned through the first positioning structure and the second positioning structure, thereby facilitating the positioning connection of the mounting plate and the outer frame. In addition, the mounting plate and the outer frame enclose a closed accommodation space, and the circuit board can be accommodated in the accommodation space. Since the circuit board is welded on the mounting plate, the assembly stability between the circuit board and the mounting plate can be ensured. In actual application, the projection of the accommodation space along the axial direction can be greater than or equal to the area of the circuit board, thereby improving the practicability of the shell. In addition, in order to ensure that the circuit board is located in the accommodation space, the circuit board can be welded on the mounting plate through external positioning tools, but the circuit board does not need to be additionally processed, such as being drilled, thereby simplifying the process and improving the convenience. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 It is the structure exploded view of the power module in the embodiment of the utility model;

[0022] Figure 2 It is the assembly relationship diagram of the mounting plate and the frame body in the embodiment of the utility model;

[0023] Figure 3 It is the structure exploded view of the mounting plate and the frame body in the embodiment of the utility model;

[0024] Figure 4 It is the structure schematic diagram of the frame body in the embodiment of the utility model;

[0025] Figure 5 It is the structure schematic diagram of the cover body in the embodiment of the utility model.

[0026] In the drawings, various reference signs represent: 1, circuit board;2, mounting plate;21, clamping groove;22, screw through hole;3, frame body;31, convex rib;32, threaded hole;33, buckle;34, positioning pin;4, screw;5, cover body;51, buckle position recess. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the present application belong to the scope of protection of the present application.

[0028] 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", "circumferential", "radial" 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 therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0030] Please refer to Figures 1 to 5 The embodiment of the present application provides a power module, which comprises: a circuit board 1 and a shell; the shell comprises a mounting plate 2 and an outer frame, the mounting plate 2 and the outer frame are assembled and connected, and the mounting plate 2 and the outer frame enclose a receiving space, the circuit board 1 is welded to the mounting plate 2 and is received in the receiving space; the mounting plate 2 is provided with a first positioning structure, the outer frame is provided with a second positioning structure, and the first positioning structure is connected to the second positioning structure.

[0031] In the embodiment of the utility model, the shell comprises the mounting plate 2 and the outer frame, the mounting plate 2 and the outer frame can be connected by the first positioning structure and the second positioning structure to realize positioning connection, thereby being favorable for the positioning connection of the mounting plate 2 and the outer frame.In addition, the mounting plate 2 and the outer frame enclose a closed accommodation space, and the circuit board 1 can be accommodated in the accommodation space.As the circuit board 1 is welded on the mounting plate 2, the assembly stability between the circuit board 1 and the mounting plate 2 can be ensured.In actual application, the projection plane of the accommodation space along the axial direction can be greater than or equal to the area of the circuit board 1, thereby improving the practicability of the shell.In addition, in order to ensure that the circuit board 1 is located in the accommodation space, the circuit board 1 can be welded on the mounting plate 2 by external positioning tooling, but it is not necessary to perform additional machining operations such as hole opening on the circuit board 1, thereby simplifying the process and improving the convenience.

[0032] That is to say, in the embodiment of the utility model, only the positioning structure needs to be arranged to positionally connect the mounting plate 2 and the outer frame to complete the assembly connection of the shell, but it is not necessary to arrange the positioning structure between the circuit board 1 and the shell, and the circuit board 1 is only required to be ensured to be located in the accommodation space in the assembly position on the mounting plate 2, and then the circuit board 1 can be welded on the mounting plate 2 by external positioning tooling, but the area and thickness of the circuit board 1 can be less than or equal to the area and thickness of the accommodation space, thereby improving the practicability of the shell.

[0033] In addition, it should be noted that the circuit board 1 is provided with an insulating layer, so that the circuit board 1 and the mounting plate 2 are electrically insulated when the circuit board 1 is welded on the mounting plate 2.

[0034] Further, in some embodiments, the first positioning structure comprises a clamping groove 21 opened in the mounting plate 2, the second positioning structure comprises a protruding rib 31 protruding from the outer frame toward the side of the mounting plate 2, and the protruding rib 31 is clamped in the clamping groove 21.

[0035] Specifically, the protruding rib 31 can protrude from the surface of the outer frame toward the mounting plate 2 along the axial direction of the power module, and the cross-sectional shape of the protruding rib 31 is in the shape of a. The clamping groove 21 is opened in the mounting plate 2 along the axial direction of the power module, and the clamping groove 21 penetrates up and down, and the cross-sectional shape of the clamping groove 21 can be in the shape of a, and the clamping groove 21 has an opening outward. In this way, the positioning connection of the mounting plate 2 and the outer frame can be realized, and at the same time, as the clamping groove 21 penetrates up and down along the axial direction and has an opening outward, the clamping of the protruding rib 31 in the clamping groove 21 is facilitated, and the assembly difficulty is reduced.

[0036] In other embodiments, the cross-sectional shape of the protruding ribs 31 and the clamping grooves 21 along the axial direction of the power module can be in a semi-closed type such as U-shaped, semi-circular, arc-shaped, etc., and the positioning and connecting of the mounting plate 2 and the outer frame can also be achieved, and the protruding ribs 31 can be clamped in the clamping grooves 21. In other embodiments, the cross-sectional shape of the protruding ribs 31 and the clamping grooves 21 along the axial direction of the power module can also be in a closed type such as circular, square, rectangular, etc., and the positioning and connecting of the mounting plate 2 and the outer frame can also be achieved.

[0037] Further, in some embodiments, the first positioning structure includes protruding ribs 31 protruding from the mounting plate 2 towards the outer frame, and the second positioning structure includes clamping grooves 21 opened on the side of the outer frame facing the mounting plate 2, and the protruding ribs 31 are clamped in the clamping grooves 21.

[0038] Specifically, the difference from the foregoing embodiments is that the protruding ribs 31 are arranged on the mounting plate 2, and the clamping grooves 21 are arranged on the outer frame, and along the axial direction of the power module, the clamping grooves 21 on the outer frame have only one opening facing the mounting plate 2, so that the clamping grooves 21 are not in communication with the receiving space, and water vapor, dust, etc. can be prevented from entering the receiving space through the clamping grooves 21 to affect the normal work of the circuit board 1. By clamping the protruding ribs 31 in the clamping grooves 21, the positioning and connecting of the mounting plate 2 and the outer frame can also be achieved, which will not be described here.

[0039] In other embodiments, the middle of the mounting plate 2 covers to form a receiving space, and the protruding ribs 31 can be arranged on the peripheral side of the mounting plate 2, so that the protruding ribs 31 are arranged on the mounting plate 2 and located outside the receiving space; Similarly, the outer frame forms a receiving space, and the outer frame can also be provided with a flange structure outside the receiving space, and the clamping grooves 21 are arranged on the flange structure, so that the clamping grooves 21 are arranged on the outer frame and located outside the receiving space. By clamping the protruding ribs 31 in the clamping grooves 21, the positioning and connecting of the mounting plate 2 and the outer frame can also be achieved; and since the clamping grooves 21 are located outside the receiving space, water vapor, dust, etc. can also be prevented from entering the receiving space through the clamping grooves 21 to affect the normal work of the circuit board 1, which will not be described here.

[0040] Further, in some embodiments, the first positioning structure includes protruding ribs 31 protruding from the mounting plate 2 and located outside the receiving space, and the second positioning structure includes through holes opened on the outer frame and located outside the receiving space, and the protruding ribs 31 are arranged on the mounting plate 2 and located outside the receiving space; Similarly, the outer frame forms a receiving space, and the outer frame can also be provided with a flange structure outside the receiving space, and the clamping grooves 21 are arranged on the flange structure, so that the clamping grooves 21 are arranged on the outer frame and located outside the receiving space. By clamping the protruding ribs 31 in the clamping grooves 21, the positioning and connecting of the mounting plate 2 and the outer frame can also be achieved; and since the clamping grooves 21 are located outside the receiving space, water vapor, dust, etc. can also be prevented from entering the receiving space through the clamping grooves 21 to affect the normal work of the circuit board 1, which will not be described here.

[0041] Specifically, the middle of the mounting plate 2 covers to form a receiving space, and the protruding ribs 31 can be arranged on the peripheral side of the mounting plate 2; and the outer frame can also be provided with a flange structure outside the receiving space, and the clamping grooves 21 are arranged on the flange structure. By clamping the protruding ribs 31 in the clamping grooves 21, the positioning and connecting of the mounting plate 2 and the outer frame can also be achieved.

[0042] Further, in some embodiments, the positioning column is arranged on the mounting plate 2, and an end of the positioning column close to the flange structure can be provided with a bevel structure, so that the end of the positioning column close to the flange structure is tapered in the axial direction of the power module from the mounting plate 2 to the outer frame, thereby facilitating the positioning column to be arranged in the through hole.

[0043] Further, in some embodiments, the first positioning structure includes a through hole arranged on the mounting plate 2 and located outside the receiving space, and the second positioning structure includes a positioning column protruding from the outer frame and located outside the receiving space, and the positioning column is arranged in the through hole.

[0044] Specifically, the difference from the foregoing embodiments is that the through hole is arranged on the outer periphery side of the mounting plate 2, and the positioning column is arranged on the flange structure of the outer frame, and the positioning and connection of the mounting plate 2 and the outer frame can also be achieved, which will not be described here.

[0045] Further, in some embodiments, the positioning column is arranged on the outer frame, and an end of the positioning column close to the mounting plate 2 can be provided with a bevel structure, so that the end of the positioning column close to the mounting plate 2 is tapered in the axial direction of the power module from the outer frame to the mounting plate 2, thereby facilitating the positioning column to be arranged in the through hole.

[0046] Further, in some embodiments, the mounting plate 2 is further provided with a mounting structure located outside the receiving space, and the mounting structure is used for assembly connection with an external heat dissipation module.

[0047] Specifically, the middle of the mounting plate 2 covers to form the receiving space, and the mounting structure can be four mounting holes arranged on the four corners of the mounting plate 2, and the heat dissipation module can be a heat sink or a liquid cooling plate, etc., and the heat sink or the liquid cooling plate, etc. can be assembled and connected with the mounting plate 2 through the mounting hole, so as to realize the assembly connection of the heat sink or the liquid cooling plate, etc. with the power module. When the power module is used, the circuit board 1 will generate a large amount of heat in the process of power conversion and signal transmission, and therefore the heat generated by the circuit board 1 can be taken away by the heat sink or the liquid cooling plate, etc. for heat dissipation.

[0048] It can be understood that the mounting structure of the embodiment of the utility model is not limited to the mounting hole. In other embodiments, the mounting structure can be adjusted adaptively according to the structure of the heat dissipation module, for example, the heat dissipation module is provided with a first buckle 33 structure, and the mounting structure can be a second buckle 33 structure.

[0049] Further, in some embodiments, the mounting plate 2 is provided with a first assembly structure, the outer frame is provided with a second assembly structure, and the first assembly structure is assembled and connected to the second assembly structure. Through the connection of the first assembly structure and the second assembly structure, the assembly connection of the mounting plate 2 and the outer frame can be realized.

[0050] Further, in some embodiments, the first assembly structure includes a screw through hole 22 arranged on the mounting plate 2, and the second assembly structure includes a threaded hole 32 arranged on the side of the outer frame facing the mounting plate 2, the threaded hole 32 and the screw through hole 22 are assembled and connected by a screw 4.

[0051] Specifically, during assembly, after the mounting plate 2 and the outer frame are positioned and connected, the threaded hole 32 and the screw through hole 22 are aligned, then the screw 4 is sequentially inserted through the screw through hole 22 and the threaded hole 32 from the side of the mounting plate 2 away from the outer frame, and is threadedly connected with the threaded hole 32, so that the assembly and connection of the mounting plate 2 and the outer frame can be achieved. Moreover, the detachable assembly by threaded connection is simple, which is beneficial for users to assemble and connect. In addition, the threaded hole 32 can be arranged as a blind hole, so that the threaded hole 32 and the accommodation space are independently arranged and not integrated, thereby preventing water vapor, dust and the like from entering the accommodation space through the clamping groove 21 to affect the normal work of the circuit board 1.

[0052] In some realizable modes, the threaded hole 32 can be arranged with a cover 5, and the screw through hole 22 is arranged on the outer frame, so that the assembly and connection of the mounting plate 2 and the outer frame can also be achieved, which will not be described herein.

[0053] Further, in some embodiments, the first assembly structure includes a first through hole arranged on the mounting plate 2 and located outside the accommodation space, and the second assembly structure includes a second through hole arranged on the outer frame and located outside the accommodation space, the first through hole and the second through hole are assembled and connected by a fastener.

[0054] Specifically, the fastener can be a screw and a nut. The middle of the mounting plate 2 covers to form the accommodation space, and the first through hole can be arranged on the outer circumferential side of the mounting plate 2; the outer frame can further be provided with a flange structure outside the accommodation space, and the second through hole can be arranged on the flange structure. During assembly, after the mounting plate 2 and the outer frame are positioned and connected, the first through hole and the second through hole are aligned, the screw is sequentially inserted through the first through hole and the second through hole, and then the nut and the screw are threadedly connected on the side of the outer frame away from the mounting plate 2, so as to complete the mounting. In another assembly mode, after the first through hole and the second through hole are aligned, the screw is sequentially inserted through the first through hole and the second through hole, and then the nut and the screw are threadedly connected on the side of the mounting plate 2 away from the outer frame, so as to complete the mounting.

[0055] Further, in some embodiments, the outer frame includes a frame body 3 and a cover 5, the frame body 3 is assembled and connected to the mounting plate 2 and surrounds the circuit board 1, and the cover 5 is assembled and connected with the frame body 3 and is arranged opposite to the mounting plate 2.

[0056] Specifically, the outer frame can include the frame body 3 and the cover body 5. The frame body 3 can be assembled with the mounting plate 2, that is, the second assembly structure can be arranged on the frame body 3. For example, the threaded hole 32 is arranged on the frame body 3. The cover body 5 is assembled with the frame body 3, and then the mounting plate 2 and the outer frame as a whole can be assembled. In addition, the cover body 5, the mounting plate 2 and the circuit board 1 are arranged in parallel, the cover body 5 and the mounting plate 2 are arranged oppositely, and the cover body 5 and the mounting plate 2 are covered on both sides of the frame body 3 along the axial direction, so that a closed accommodation space can be formed, and the circuit board 1 can be protected.

[0057] It can be understood that, in some embodiments, the mounting plate 2 can be assembled with the cover body 5, that is, the second assembly structure can be arranged on the cover body 5, and the mounting plate 2 and the outer frame as a whole can be assembled.

[0058] In some embodiments, the second positioning structure can be arranged on the frame body 3. For example, the protruding rib 31 protrudes from one side of the frame body 3 towards the mounting plate 2.

[0059] In some embodiments, the second positioning structure can also be arranged on the cover body 5.

[0060] Further, in some embodiments, the frame body 3 is provided with a buckle 33, the cover body 5 is provided with a buckle groove 51, and the buckle 33 is assembled in the buckle groove 51. By assembling the buckle 33 in the buckle groove 51, the cover body 5 and the frame body 3 can be assembled, and the assembly method is simple.

[0061] In some specific embodiments, the buckle 33 can be a wedge-shaped buckle 33, and a plurality of buckles 33 can be arranged on the inner side wall of the frame body 3 in a spaced manner. Correspondingly, a plurality of buckle grooves 51 can be arranged on the periphery of the cover body 5 in a spaced manner, and the buckle 33 and the buckle groove 51 correspond one by one. By connecting the buckle 33 and the buckle groove 51 one by one, the cover body 5 and the frame body 3 can be assembled. And because there are a plurality of buckles 33 and a plurality of buckle grooves 51, the assembly stability can be improved.

[0062] It can be understood that the number of buckles 33 and buckle grooves 51 is not limited in the embodiments of the utility model, and the specific arrangement position of the buckle 33 on the cover body 5 and the specific arrangement position of the buckle groove 51 on the frame body 3 are not limited, as long as the buckle 33 and the buckle groove 51 correspond one by one. In some specific embodiments, a connecting structure is protruded on the inner wall of the frame body 3, the buckle 33 can be arranged on the connecting structure, and the buckle groove 51 is arranged on the cover body 5 corresponding to the connecting structure, so that the number and position of the buckle 33 and the buckle groove 51 correspond, and the cover body 5 and the frame body 3 can be assembled.

[0063] Further, in some embodiments, the frame 3 is provided with a buckle groove 51, and the cover 5 is provided with a buckle 33, which is assembled and connected to the buckle groove 51. By assembling the buckle 33 to the buckle groove 51, the assembly and connection of the cover 5 and the frame 3 can be achieved, and the assembly method is simple.

[0064] Specifically, the difference from the foregoing embodiments is that the buckle groove 51 is provided on the frame 3, and the buckle groove 51 can be provided on the inner side wall of the frame 3 or the connecting structure in the frame 3; the buckle 33 is provided on the cover 5, and the buckle 33 can be provided on the circumferential side of the cover 5 or the position corresponding to the connecting structure on the cover 5. By assembling the buckle 33 to the buckle groove 51, the assembly and connection of the cover 5 and the frame 3 can also be achieved. In addition, by connecting the plurality of buckles 33 and the plurality of buckle grooves 51 one by one, the assembly stability can also be improved.

[0065] In addition, the number of buckles 33 and buckle grooves 51 is also not limited, and the specific setting position of the buckle 33 on the cover 5 and the specific setting position of the buckle groove 51 on the frame 3 are also not limited, as long as the buckle 33 and the buckle groove 51 correspond one by one.

[0066] Further, in some embodiments, the frame 3 is provided with a limiting rim, and the cover 5 is provided with a flange and a boss adjacent to the flange, the flange abuts against the limiting rim, and the boss abuts against the inner side wall of the frame 3.

[0067] Specifically, the side of the frame 3 facing the cover 5 has a limiting rim, and the cover 5 is provided with a flange, which can be attached to the limiting rim, and the cover 5 is also provided with a boss adjacent to the flange, which can abut and attach to the inner side wall of the frame 3 along the circumferential side of the axial direction of the power module. In this way, the positioning and connection of the cover 5 and the frame 3 can be achieved.

[0068] Further, in some embodiments, the frame 3 is provided with a positioning pin 34, and the cover 5 is provided with a positioning hole, and the positioning and connection of the cover 5 and the frame 3 can also be achieved by connecting the positioning pin 34 and the positioning hole. Moreover, by the guiding action of the positioning pin 34, the cover 5 and the frame 3 can be better connected.

[0069] Further, in some embodiments, the positioning pin 34 is provided on the frame 3, and one end of the positioning pin 34 close to the cover 5 can be provided with an inclined surface structure, so that along the axial direction of the power module, the one end of the positioning pin 34 close to the cover 5 tapers from the frame 3 to the cover 5, thereby facilitating the positioning pin 34 to be inserted into the positioning hole.

[0070] Further, in some embodiments, the frame 3 can include a plastic body, an insert nut and a positioning pin 34. The threaded hole 32 can be provided in the insert nut. The positioning pin 34 and the insert nut can form the frame 3 as a whole through a molding process, ultrasonic welding, hot melting or the like.

[0071] In some specific embodiments, the cover 5 is provided with a flange, a boss and a positioning pin 34 at the same time, and the frame 3 is provided with a limiting edge and a positioning hole at the same time. During assembly, the positioning pin 34 and the positioning hole can be connected, and the limiting edge and the flange can be fitted, and the boss and the inner side wall of the frame 3 can be fitted, so as to realize the positioning connection. In addition, the buckle 33 and the buckle groove 51 are assembled and connected, so as to realize the assembly connection of the cover 5 and the frame 3.

[0072] It can be understood that, in some specific embodiments, the flange surrounds the four sides of the cover 5, and the boss also surrounds the four sides of the cover 5. When the buckle groove 51 or the buckle 33 is provided on the outer circumferential side of the cover 5, the buckle groove 51 or the buckle 33 can be provided on the flange and / or the boss of the cover 5.

[0073] In some specific embodiments, the assembly process of the power module as a whole can be as follows: first, the circuit board 1 is welded on the mounting plate 2 through an external positioning tool; then, the frame 3 and the mounting plate 2 are positioned through the clamping groove 21 and the protruding rib 31, and the frame 3 and the mounting plate 2 are assembled and connected through the screw 4 passing through the screw through hole 22 to be screwed with the threaded hole 32; then, the frame 3 and the cover 5 are positioned through the positioning pin 34 and the positioning hole, and the limiting edge and the flange; finally, the frame 3 and the cover 5 are assembled and connected through the buckle groove 51 and the buckle 33.

[0074] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0075] The above is the description of the technical scheme provided by the present application. For those skilled in the art, according to the idea of the embodiments of the present application, the specific implementation and application range can be changed. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A power module, characterized by The utility model relates to a circuit board and a shell, and a mounting plate and an outer frame are assembled to the shell, and the mounting plate and the outer frame enclose a receiving space, the circuit board is welded to the mounting plate and is received in the receiving space, the mounting plate is provided with a first positioning structure, the outer frame is provided with a second positioning structure, the first positioning structure is connected to the second positioning structure. The first positioning structure includes a clamping groove formed in the mounting plate, and the second positioning structure includes a protruding rib protruding from the outer frame toward the mounting plate, and the protruding rib is clamped in the clamping groove. Alternatively, the first positioning structure includes a protruding rib protruding from the mounting plate toward the outer frame, and the second positioning structure includes a clamping groove formed in the outer frame toward the mounting plate, and the protruding rib is clamped in the clamping groove.

2. The power module of claim 1, wherein, The first positioning structure includes a positioning column protruding from the mounting plate and located outside the receiving space, and the second positioning structure includes a through hole formed in the outer frame and located outside the receiving space, and the positioning column is arranged in the through hole. Alternatively, the first positioning structure includes a through hole formed in the mounting plate and located outside the receiving space, and the second positioning structure includes a positioning column protruding from the outer frame and located outside the receiving space, and the positioning column is arranged in the through hole.

3. The power module of claim 1, wherein, The mounting plate is further provided with a mounting structure located outside the receiving space, and the mounting structure is used for being assembled to an external heat dissipation module. The mounting plate is provided with a first assembly structure, and the outer frame is provided with a second assembly structure, and the first assembly structure is assembled to the second assembly structure.

4. The power module of claim 1, wherein, The first assembly structure includes a screw through hole arranged on the mounting plate, and the second assembly structure includes a threaded hole arranged on the outer frame toward the mounting plate, and the threaded hole and the screw through hole are assembled by a screw.

5. The power module of claim 1, wherein, The first assembly structure includes a first through hole arranged on the mounting plate and located outside the receiving space, and the second assembly structure includes a second through hole arranged on the outer frame and located outside the receiving space, and the first through hole and the second through hole are assembled by a fastener.

6. The power module of claim 5, wherein, The outer frame includes a frame body and a cover body, the frame body is assembled to the mounting plate and encloses the circuit board, and the cover body is assembled to the frame body and is arranged opposite to the mounting plate.

7. The power module of claim 5, wherein, The frame body is provided with a buckle, and the cover body is provided with a buckle groove, and the buckle is assembled in the buckle groove.

8. The power module of claim 1, wherein, Alternatively, the frame body is provided with a buckle groove, and the cover body is provided with a buckle, and the buckle is assembled to the buckle groove.

9. The power module of claim 8, wherein, The frame body is provided with a limiting edge, the cover body is provided with a flange and a boss adjacent to the flange, the flange abuts against the limiting edge, and the boss abuts against the inner side wall of the frame body. ​ 10. The power module of claim 8, wherein, ​

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