Electronic device fixing structure, power module and controller

Abstract

The invention provides an electronic device fixing structure, a power module and a controller. The electronic device fixing structure comprises a first shell part and a second shell part, the first shell part is connected with the second shell part, the electronic device fixing structure comprises a first mounting cavity and a second mounting cavity, the wall forming the first mounting cavity comprises at least part of the first shell part, the first shell part is provided with a pin via hole, and the first shell part is provided with a pin. The pin via hole is communicated with the first mounting cavity; the wall forming the second mounting cavity comprises at least part of a second shell part, the second shell part is provided with a terminal accommodating cavity and an electrode jack, and the electrode jack is communicated with the second mounting cavity. According to the invention, the problem of tedious installation of the power element is improved.

Description

Technical Field

[0001] The present application relates to the technical field of power element installation, and in particular to an electronic device fixing structure, a power module and a controller. Background Art

[0002] In the related art, power components are usually semiconductor power components such as IGBT, silicon carbide or MOSFET. Due to their ability to withstand high voltage and high current, these power components are widely used in power conversion or power output devices such as inverters and frequency converters. However, during the installation of such power components with external circuits, the power components need to be positioned one by one for installation, which makes the installation of power components cumbersome. Summary of the invention

[0003] The present application provides an electronic device fixing structure, a power module and a controller, wherein the electronic device fixing structure can improve the problem of cumbersome installation of power components.

[0004] In a first aspect, the present application provides an electronic device fixing structure, comprising a first shell portion and a second shell portion, the first shell portion and the second shell portion being connected, the electronic device fixing structure comprising a first mounting cavity and a second mounting cavity, the wall forming the first mounting cavity comprising at least a portion of the first shell portion, the first shell portion being provided with a pin via, the pin via being connected to the first mounting cavity; the wall forming the second mounting cavity comprising at least a portion of the second shell portion, the second shell portion being provided with a terminal accommodating cavity and an electrode socket, the electrode socket being connected to the second mounting cavity.

[0005] An electronic device fixing structure provided in an embodiment of the present application is provided with a first shell portion and a first installation cavity; the first installation cavity can accommodate multiple power components, and the first shell portion is provided with a pin via connected to the first installation cavity, and the pin via can play a role in positioning the multiple power components; in addition, a second shell portion and a second installation cavity are provided; the second installation cavity can accommodate a three-phase electrical terminal for connecting an external circuit, and the second shell portion is provided with an electrode socket connected to the second installation cavity, and the power component can be connected to the external circuit at least through the electrode socket and the three-phase electrical terminal; the electronic device fixing structure can realize modular integration of multiple power components and three-phase electrical terminals, facilitate the connection between the power components and the external circuit, and improve the problem of cumbersome installation of the power components.

[0006] In a second aspect, the present application further provides a power module, including an electronic device fixing structure, a plurality of power elements and a three-phase electrical terminal, wherein the electronic device fixing structure includes a housing, the housing includes a first housing portion and a second housing portion, and the electronic device fixing structure includes a first mounting cavity and a second mounting cavity;

[0007] The wall forming the first installation cavity includes at least a portion of the first housing portion, at least a portion of the power element is located in the first installation cavity, the power element includes a pin, the first housing portion is provided with a pin through-hole, and the pin passes through the pin through-hole;

[0008] The wall forming the second installation cavity includes at least part of the second shell portion, at least part of the three-phase electrical terminal is located in the second installation cavity, the three-phase electrical terminal includes an electrode plug-in portion, the second shell portion is provided with an electrode plug-in hole, and at least part of the electrode plug-in portion is located in the electrode plug-in hole.

[0009] A power module provided in the present application includes an electronic device fixing structure; the electronic device fixing structure is provided with a first mounting cavity and a first housing portion, the first housing portion is provided with a pin through hole, at least part of a plurality of power elements are located in the first mounting cavity, and the pins of the power elements pass through the pin through hole, thereby playing a role in positioning the plurality of power elements; the electronic device fixing structure is also provided with a second mounting cavity and a second housing cavity, the second housing portion is provided with an electrode plug hole, at least part of the three-phase electrical terminals are located in the second mounting cavity, and at least part of the electrode plug-in portion of the three-phase electrical terminals is located in the electrode plug hole, and the power element can be connected to an external circuit at least through the electrode plug hole and the three-phase electrical terminal, thereby providing convenience for the power element to connect to the external circuit. The power module at least utilizes the electronic device fixing structure to modularly integrate a plurality of power elements and three-phase electrical terminals, provides convenience for the connection of the power element to the external circuit, and improves the problem of cumbersome installation of the power element.

[0010] In a third aspect, the present application further provides a controller, comprising the above-mentioned electronic device fixing structure, a plurality of power components, a three-phase electrical terminal and a printed circuit board, at least part of the power components are located in the first mounting cavity of the electronic device fixing structure, the power components include pins, the pins pass through the pin vias and are fixedly connected to the printed circuit board;

[0011] At least part of the three-phase electrical terminal is located in the second installation cavity, the three-phase electrical terminal includes an electrode plug-in portion, at least part of the electrode plug-in portion is located in the electrode plug-in hole, and at least part of the electrode plug-in portion is located in the electrode plug-in hole.

[0012] A controller provided in the present application includes the above-mentioned electronic device fixing structure, multiple power elements, three-phase electrical terminals and a printed circuit board. The electronic device fixing structure can realize modular integration of power elements and three-phase electrical terminals, thereby reducing the difficulty of connecting the power elements with the printed circuit board. The power elements can also be conveniently connected to the external circuit at least through the three-phase electrical terminals, thereby improving the problem of cumbersome installation of power elements and helping to improve the production efficiency of the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0014] Figure 1 Schematic diagram of the structure for fixing the electronic device

[0015] Figure 2 A schematic diagram showing a part of the structure of the housing;

[0016] Figure 3 A bottom view for showing the second cavity;

[0017] Figure 4 A schematic diagram showing some of the jumper and jumper cover structures

[0018] Figure 5 A bottom view of the connection structure between the jumper cover and the housing;

[0019] Figure 6 An exploded view of the fixing structure of the electronic device;

[0020] Figure 7 It is a partial structural schematic diagram of the power module;

[0021] Figure 8 This is an exploded diagram of the power module;

[0022] Fig. 9 It is the structural diagram of the controller;

[0023] Fig.10 This is a diagram of the controller's dial-and-bomb operation.

[0024] 1. Shell; 11. Jumper cover; 111. Jumper slot; 112. Jumper via; 12. First shell part; 13. Pin via; 14. Second shell part; 15. Positioning block; 16. Second mounting cavity; 161. Bus duct; 162. Terminal accommodating cavity; 163. Electrode jack; 17. First mounting cavity; 18. Mounting slot; 19. Support partition; 191. Weight reduction slot; 192. Pre-positioning column; 2. First cover; 21. Positioning buckle; 22. Pre-positioning hole; 3. Power element; 31. Pin; 4. Bus; 5. Three-phase electrical terminal; 51. Electrode plug-in part; 6. Heat conducting sheet; 7. Jumper; 71. Main circuit part; 72. Branch circuit part; 73. Jumper part; 8. Second cover; 9. Printed circuit board.

[0025] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0026] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0027] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Figure 1-10 , the embodiments of the present application are described.

[0028] In the controller, the power element needs to be electrically connected to the external circuit. The specific external circuit includes the input power circuit of the power element, the control circuit that generates the control signal, and the load circuit that receives the output signal of the power element. In the controller, the power element often includes multiple ones. How to reduce the installation cost of the power element is a technical problem that needs to be solved. It should be noted that the installation described in this application includes electrical connection installation and mechanical installation.

[0029] Based on this, an embodiment of the present application provides an electronic device fixing structure, including a shell 1, a first cover body 2 and a second cover body 8, the shell 1 includes a first shell part 12 and a second shell part 14, the first shell part 12 and the second shell part 14 are an integral part, the first shell part 12 is provided with a first installation cavity 17 and an installation groove 18 for accommodating a power element 3, in this embodiment, the power element 3 is an IGBT, the IGBT includes a pin 31, the first installation cavity 17 and the installation groove 18 are provided with a pin through-hole 13, the pin 31 and the pin through-hole 13, the first cover body 2 is arranged on the side of the power element 3 away from the shell 1, and the first cover body 2 is abutted against the power element 3.

[0030] The multiple power components 3 are modularly integrated through the shell 1 and the first cover body 2, so that the relative positions of the multiple power components 3 integrated in the same shell 1 are relatively fixed. Therefore, in the subsequent assembly and welding process with the printed circuit board 9, the positioning and assembly of the circuit board and the multiple power components 3 can be completed through one alignment, thereby simplifying the process flow; the power component 3 is in contact with the first cover body 2, and the heat is dissipated more quickly through the larger heat dissipation surface of the first cover body 2, thereby improving the heat dissipation efficiency of the power component 3.

[0031] A limiting structure is provided in the mounting groove 18 and the first mounting cavity 17. In the present embodiment, the limiting structure is a limiting column. The IGBT is provided with a limiting hole. There are a plurality of limiting columns. The plurality of limiting columns correspond to the limiting holes of the plurality of IGBTs one by one and are clearance-matched. A supporting partition 19 is provided between the mounting groove 18 and the first mounting cavity 17. The supporting partition 19 is integrally formed with the shell 1. The supporting partition 19 is provided with a weight-reducing groove 191. There are a plurality of weight-reducing grooves 191. The plurality of weight-reducing grooves 191 are arranged in a rectangular array. The bottom surfaces of the first mounting cavity 17 and the mounting groove 18 are provided with pin through holes 13 for the IGBT pins 31 to pass through. The pin through holes 13 are arranged in a direction parallel to the length direction of the supporting partition 19. The shell 1 is also provided with a weight-reducing cavity. The weight-reducing cavity is a rectangular cavity. The length direction of the weight-reducing cavity is perpendicular to the length direction of the supporting partition 19.

[0032] The setting of the first mounting cavity 17 and the mounting groove 18 can be used to accommodate the power element 3. The setting of the pin through hole 13 can, on the one hand, allow the pin 31 of the power element 3 to pass through the shell 1, and on the other hand, limit the power element 3, so that the power element 3 and the shell 1 remain relatively fixed, which is convenient for the overall installation of the electronic device fixed structure. The setting of the weight-reducing groove 191 and the weight-reducing cavity can reduce the weight of this power module and the amount of material used.

[0033] The second housing portion 14 is provided with a second installation cavity 16, and the opening of the second installation cavity 16 is opposite to that of the first installation cavity 17. The second installation cavity 16 includes a bus duct 161, a terminal accommodating cavity 162 and an electrode socket 163. Part of the bus duct 161 is located on the first housing portion 12, and the bus duct 161 located on the first housing portion 12 and the first installation cavity 17 are located on two opposite sides of the first housing portion 12, the terminal accommodating cavity 162 is communicated with the bus duct 161, and the second housing portion 14 is provided with an electrode socket 163, and the electrode socket 163 is communicated with the terminal accommodating cavity 162.

[0034] By arranging the first mounting cavity 17 and the second mounting cavity 16 on two opposite sides of the housing 1, the volume and material consumption of the electronic device fixing structure can be reduced; when using the electronic device fixing structure, the electrode connected to the input end of the external energy-consuming device is inserted into the electrode plug-in portion 51, so as to realize the electrical connection between the power element 3, the busbar 4, the three-phase electrical terminal 5 and the external load. The external load circuit can be a three-phase coil of a motor or a compressor, and the convenience and reliability of the electrical connection between the external load and the three-phase electrical terminal 5 can be improved by the electrodes and the electrode plug-in portion 51 that are plugged in and matched with each other. Specifically, the installation of the power element 3 and the printed circuit board can be completed through the pin via 13 to realize the electrical connection between the power element and the input power circuit and the control circuit; and the electrical connection between the power element and the load circuit is realized at least through the three-phase electrical terminal and the motor socket. In one embodiment, in addition to the three-phase electrical terminal and the motor socket, the electrical connection between the power element and the load circuit also needs to cooperate with the layout design of the printed circuit board.

[0035] The first cover 2 is provided at the position of the first housing portion 12 where the first mounting cavity 17 and the mounting groove 18 are provided. The first cover 2 is provided with a pre-positioning hole 22. The support partition 19 of the housing 1 is integrally formed with a pre-positioning column 192. The height of the pre-positioning column 192 is greater than the thickness of the first cover 2. The axis of the pre-positioning column 192 coincides with the axis of the pre-positioning hole 22. The pre-positioning column 192 is clearance-matched with the pre-positioning hole 22. Two pre-positioning holes 22 and two pre-positioning columns 192 are provided. The two pre-positioning holes 22 and the two pre-positioning columns 192 are arranged along the length direction of the support partition 19. The second cover 8 is provided on the side of the second housing portion 14 and the first housing portion 12 where a portion of the bus duct 161 is provided, and is fixedly connected to the second housing portion 14 through a connector.

[0036] The pre-positioning posts 192 are used in conjunction with the pre-positioning holes 22 to pre-align the relative positions of the first cover body 2 and the shell 1 when installing the first cover body 2 and the shell 1. The first cover body 2 is moved closer to the shell 1, and the two pre-positioning posts 192 are first inserted into the corresponding two pre-positioning holes 22, and then the first cover body 2 and the shell 1 are buckled together, thereby reducing the difficulty of assembly.

[0037] The first shell part 12 has a first connecting plate integrally formed on its side wall, and the first connecting plate has a first connecting hole, the first cover 2 has a second connecting plate integrally formed on its side wall, and the second connecting plate has a second connecting hole, the axis of the first connecting hole coincides with the axis of the second connecting hole, and the diameters of the first connecting hole and the second connecting hole are the same, and fasteners are provided in the first connecting hole and the second connecting hole, and the fasteners are fastening screws, which pass through the first connecting hole and the second connecting hole in sequence along the axis of the first connecting hole, and are threadedly connected to the first connecting plate and the second connecting plate in sequence. The side wall of the shell 1 connected to the first connecting plate is fixedly connected to a hook-shaped positioning block 15, and the side wall parallel to the side wall of the first cover 2 and the first shell part 12 connected to the positioning block 15 is integrally formed with a positioning buckle 21, and the positioning buckle 21 is limitedly connected to the positioning block 15.

[0038] The first connecting plate and the second connecting plate are used together to realize a detachable connection between the first cover body 2 and the shell 1. When connecting the first cover body 2 and the shell 1, after completing the pre-positioning through the pre-positioning hole 22 and the pre-positioning column 192, in the process of snapping the first cover body 2 and the shell 1, the positioning block 15 undergoes elastic deformation and completes the snap connection with the positioning buckle 21. At this time, the first cover body 2 and the shell 1 are preliminarily assembled and remain relatively fixed under the action of the positioning buckle 21 and the positioning block 15. Thereafter, a more stable threaded connection can be completed through the first connecting plate, the second connecting plate and fasteners, and the power module can also be assembled and connected with other devices through fasteners.

[0039] A jumper 7 is provided on one side of the housing 1 away from the mounting groove 18. The jumper 7 includes a trunk portion 71, a branch portion 72 and a pin portion 73. The trunk portion 71 is parallel to the length direction of the supporting partition 19. The trunk portion 71 of a jumper 7 is fixedly connected to three branch portions 72. The three branch portions 72 are all located on the same side of the trunk portion 71 and are arranged perpendicular to the trunk portion 71. A jumper 7 includes three pin portions 73. The three pin portions 73 correspond to the three branch portions 72 one by one and are fixedly connected. The pin portion 73 is connected to one end of the branch portion 72 away from the main circuit portion 71, and the branch portion 72 is vertically arranged on the side wall of the shell 1 close to the jumper 7; a jumper cover 11 is integrally formed on the side of the shell 1 where the jumper 7 is arranged, and the jumper cover 11 is E-shaped. The jumper cover 11 is close to the side wall of the shell 1 and is provided with a jumper slot 111 for accommodating the main circuit portion 71 and the branch portion 72. The jumper cover 11 is away from the side wall of the shell 1 and is provided with a jumper through hole 112 for the pin portion 73 to pass through the jumper cover 11.

[0040] The jumper 7 can be used to achieve electrical connection between two vias or electrodes in the external printed circuit board 9 that are separated by a certain distance. By pre-setting the jumper 7 in the power element 3, the difficulty of wiring the external printed circuit board 9 can be simplified, thereby improving the compatibility of the power element 3; the setting of the jumper cover 11 can, on the one hand, connect the jumper 7 with the housing 1, and on the other hand, cover the jumper 7, thereby reducing the probability of a short circuit caused by contact between the busbar 4 and an external conductor.

[0041] In one embodiment, a power module, a power element 3, a busbar 4, a three-phase electrical terminal 5, a heat-conducting medium and a fixing structure of the above electronic devices are also provided. In this embodiment, the power element 3 is an IGBT, and the power element 3 is plugged into the first shell part 12. The heat-conducting medium is located between the first cover body 2 and the power element 3, and is tightly abutted against the first cover body 2 and the power element 3. The busbar 4 is connected to the shell 1, one end of the busbar 4 is electrically connected to the three-phase electrical terminal 5, and the other end is electrically connected to the power element 3.

[0042] The plurality of power elements 3 are modularly combined through the first shell portion 12 and the first cover body 2, and the power elements 3 are powered by the busbar 4 with a stronger current carrying capacity. The relative positions of the plurality of power elements 3 integrated in the same shell 1 are more fixed. Therefore, in the subsequent assembly and welding process with the printed circuit board 9, the positioning and assembly of the circuit board and the plurality of power elements 3 can be completed by one-time alignment, thereby simplifying the process flow. The power elements 3 are in contact with the first cover body 2 through the heat-conducting medium, which can improve the heat exchange rate between the first cover body 2 and the power elements 3, thereby achieving faster heat dissipation with the help of the larger heat dissipation surface of the first cover body 2, thereby improving the heat dissipation efficiency of the power elements 3.

[0043] There are three busbars 4 and three-phase electrical terminals 5, and they are all made of conductive materials. One busbar is fixedly connected to one three-phase electrical terminal. An electrode plug-in portion 51 is integrally formed at one end of the three-phase electrical terminal 5 away from the busbar 4. The busbar 4 and the busbar groove 161 are interference fit, and the three-phase electrical terminal 5 and the terminal accommodating cavity 162, and the electrode plug-in portion 51 and the electrode socket 163 are interference fit.

[0044] When installing the power module, the electrode connected to the input end of the external energy-consuming device is inserted into the electrode plug-in portion 51, and the three-phase electrical terminal 5 is embedded in the terminal accommodating cavity 162, and the busbar 4 is embedded in the busbar groove 161, so that the power element 3, the busbar 4, the three-phase electrical terminal 5 and the second shell portion 14 can be fixed together, and then the second cover 8 is fastened to complete the installation of the power module. The electrodes and the electrode plug-in portion 51 that are plugged in and matched with each other can improve the convenience and reliability of the electrical connection between the external load and the three-phase electrical terminal 5.

[0045] The heat-conducting medium is a heat-conducting material with a thermal conductivity higher than 0.8 W / (m·K). In this embodiment, the heat-conducting medium is a heat-conducting sheet 6. Two heat-conducting sheets 6 are provided. One heat-conducting sheet 6 is provided between the power element 3 in the mounting groove 18 and the first cover body 2, and the other heat-conducting sheet 6 is provided between the power element 3 in the first mounting cavity 17 and the first cover body 2. The two sides of the heat-conducting sheet 6 with the largest areas are tightly abutted against the first cover body 2 and the packaging part of the power element 3, respectively.

[0046] The heat conducting sheet 6 can fill the gap between the power element 3 and the first cover 2, so that the power element 3 and the heat conducting sheet 6, and the first cover 2 and the heat conducting sheet 6 can fit tightly, which is more conducive to the transfer of heat and improves the heat transfer efficiency. In addition, since the heat conducting sheet 6 has good elasticity, before installing the heat conducting sheet 6, if there is a small size deviation in the power element 3 or the first cover 2 during the previous processing or assembly process, the elastic heat conducting sheet 6 can compensate for the deviation, thereby ensuring the transfer of heat and better heat dissipation effect.

[0047] When installing the power module, first plug and match the jumper 7 with the jumper cover 11, and then connect the jumper cover 11 to the side of the shell 1 away from the power element 3 through ultrasonic welding, and then match the pins 31 of the power element 3 with the pin holes 13 of the shell 1 one by one to complete the plug-in installation of the power element 3 and the shell 1. After the power element 3 is installed, the thermal conductive sheet 6 is covered on the packaging surface of the power element 3, and then the first cover body 2 is installed, and the pre-positioning hole 22 of the first cover body 2 is first aligned and plug-matched with the pre-positioning column 192 of the shell 1 to complete the pre-positioning of the first cover body 2 and the shell 1, and then the first cover body 2 is buckled to complete the snap connection between the positioning block 15 and the positioning snap 21, and finally, the bus 4 connected with the three-phase electrical terminal 5 is installed together with the three-phase electrical terminal 5 into the bus slot 161 and the terminal accommodating cavity 162, and the bus 4 and the three-phase electrical terminal 5 are snap-connected with the shell 1, thereby completing the assembly of the power module.

[0048] In one embodiment, a controller is further provided, comprising a printed circuit board 9 and a power module as described above, wherein the printed circuit board 9 is provided with a reserved pin hole, a reserved jumper hole and a reserved busbar hole, the pin 31 is electrically connected to the printed circuit board 9 through the reserved pin hole, the jumper 7 is electrically connected to the printed circuit board 9 through the reserved jumper hole, and the end of the busbar 4 away from the three-phase electrical terminal 5 is electrically connected to the printed circuit board 9 through the reserved busbar hole.

[0049] When the power module is connected to the printed circuit board 9 to form the controller, the busbar 4, the pin 31 of the power element 3 and the pin portion 73 of the jumper 7 are first aligned with the reserved holes of the printed circuit board 9, and the plugging and welding are completed to complete the connection with the printed circuit board 9. Then, the input electrode of the external load is inserted into the electrode plug-in portion 51 to complete the assembly of the power module and the external device. When the external printed circuit board 9 inputs an electrical signal to the power module, the power element 3 will output electrical energy to the external power consumption device through the busbar 4, the three-phase electrical terminal 5 and the electrode plug-in portion 51 and generate a large amount of heat. At this time, the heat conducting sheet 6 abutting against the power element 3 can conduct the heat energy generated by the power element 3 to the first cover body 2, and dissipate the heat to the outside through the first cover body 2. The first cover body 2 has a larger heat dissipation area than the power element 3, thereby improving the heat dissipation capacity of the power module.

[0050] When producing the above-mentioned controller, since the power element 3 is integrated in the shell 1, the positions of multiple power elements 3 can be kept relatively fixed through the limiting effect of the shell 1. When the power element 3 and the printed circuit board 9 are positioned and welded, the positioning and welding of multiple power elements 3 can be completed in a short time, thereby improving the production efficiency of the controller.

[0051] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0052] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An electronic device fixing structure, characterized in that: The electronic device fixing structure comprises a first housing portion (12) and a second housing portion (14), wherein the first housing portion (12) and the second housing portion (14) are connected, and the electronic device fixing structure comprises a first mounting cavity (17) and a second mounting cavity (16), wherein a wall forming the first mounting cavity (17) comprises at least a portion of the first housing portion (12), the first housing portion (12) is provided with a pin through hole (13), and the pin through hole (13) is connected to the first mounting cavity (17); and a wall forming the second mounting cavity (16) comprises at least a portion of the second housing portion (14), the second housing portion (14) is provided with an electrode plug hole (163), and the electrode plug hole (163) is connected to the second mounting cavity (16).

2. The electronic device fixing structure according to claim 1, characterized in that: The second mounting cavity (16) comprises a busbar duct (161) and a terminal accommodating cavity (162); the terminal accommodating cavity (162) is connected to the busbar duct (161); at least part of the busbar duct (161) and the first mounting cavity (17) are respectively located on two sides of the first housing portion (12); and an opening direction of the first mounting cavity (17) is opposite to an opening direction of the second mounting cavity (16).

3. The electronic device fixing structure according to claim 1, characterized in that: It also includes a first cover body (2) and a second cover body (8), wherein the first cover body (2) is covered on the first shell part (12), the first cover body (2) is provided with a pre-positioning hole (22), the first shell part (12) is provided with a pre-positioning column (192), the pre-positioning column (192) and the pre-positioning hole (22) are assembled and matched, and the second cover body (8) is covered on the second shell part (14) and is detachably connected to the second shell part (14).

4. The electronic device fixing structure according to any one of claims 1 to 3, characterized in that: The electronic device fixing structure comprises a jumper cover (11) and a jumper (7); the jumper cover (11) is fixedly connected to a side of the first housing portion (12) away from the first installation cavity (17); a jumper slot (111) is provided on a side of the jumper cover (11) close to the first housing portion (12); the jumper cover (11) is provided with a plurality of jumper through holes (112); at least part of the jumper (7) is located in the jumper slot (111); and both ends of the jumper (7) pass through the jumper through holes (112) to exit the jumper cover (11).

5. A power module, characterized in that: The electronic device fixing structure comprises a plurality of power elements (3), a three-phase electrical terminal (5) and an electronic device fixing structure, wherein the electronic device fixing structure comprises a first housing portion (12) and a second housing portion (14), and the electronic device fixing structure comprises a first installation cavity (17) and a second installation cavity (16); The wall forming the first installation cavity (17) includes at least a portion of the first housing portion (12), at least a portion of the power element (3) is located in the first installation cavity (17), the power element (3) includes a pin (31), the first housing portion (12) is provided with a pin through hole (13), and the pin (31) passes through the pin through hole (13); The wall forming the second installation cavity (16) includes at least a portion of the second housing portion (14), at least a portion of the three-phase electrical terminal (5) is located in the second installation cavity (16), the three-phase electrical terminal (5) includes an electrode plug-in portion (51), the second housing portion (14) is provided with an electrode plug-in hole (163), and at least a portion of the electrode plug-in portion (51) is located in the electrode plug-in hole (163).

6. A power module according to claim 5, characterized in that: The power module comprises a busbar (4), one end of which is fixedly connected to or integrally formed with the three-phase electrical terminal (5); The second installation cavity (16) comprises a busbar trough (161) and a terminal accommodating cavity (162), at least part of the busbar trough (161) and the first installation cavity (17) are respectively located on two sides of the first housing portion (12), and the opening direction of the first installation cavity (17) is opposite to the opening direction of the second installation cavity (16); At least a portion of the busbar (4) is located in the busbar duct (161), and the other end of the busbar (4) extends in a direction away from the first housing portion (12).

7. A power module according to claim 5 or 6, characterized in that: The electronic device fixing structure comprises a second cover body (8), wherein the second cover body (8) is covered on the second housing portion (14), and the wall forming the second installation cavity (16) comprises at least a part of the second cover body (8).

8. A power module according to claim 7, characterized in that: The electronic device fixing structure comprises a first cover body (2), the first cover body (2) is covered on the first shell part (12), the wall forming the first installation cavity (17) comprises at least a part of the first cover body (2), a heat-conducting medium is arranged between the power element (3) and the first cover body (2), the heat-conducting medium is in contact with the power element (3), and the side of the heat-conducting medium away from the power element (3) is in contact with the first cover body (2).

9. A controller, characterized in that: It comprises a plurality of power elements (3), a three-phase electrical terminal (5), a printed circuit board (9) and an electronic device fixing structure as claimed in any one of claims 1 to 4; At least part of the power element (3) is located in the first mounting cavity (17) of the electronic device fixing structure, the power element (3) comprises a pin (31), and the pin (31) passes through the pin through hole (13) and is fixedly connected to the printed circuit board (9); At least part of the three-phase electrical terminal (5) is located in the second installation cavity (16), and the three-phase electrical terminal (5) comprises an electrode plug-in portion (51), and at least part of the electrode plug-in portion (51) is located in the electrode plug hole (163).

10. A controller according to claim 9, characterized in that: The controller comprises a busbar (4), one end of which is fixedly connected to or integrally formed with the three-phase electrical terminal (5); The second installation cavity (16) comprises a busbar trough (161) and a terminal accommodating cavity (162), at least part of the busbar trough (161) and the first installation cavity (17) are respectively located on two sides of the first housing portion (12), and the opening direction of the first installation cavity (17) is opposite to the opening direction of the second installation cavity (16); At least part of the busbar (4) is located in the busbar slot (161), and the other end of the busbar (4) extends in a direction away from the first housing portion (12) and is fixedly connected to the printed circuit board (9).

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