Magnetic shielding shell of stackable power supply module

Abstract

The utility model discloses a stackable power supply module's magnetic shielding casing relates to power supply module technical field, including casing main part and positioning hole, casing main part includes high magnetic conductive metal layer, insulation buffer layer and shielding effectiveness enhancement layer, the outer surface of insulation buffer layer is provided with the shielding effectiveness enhancement layer, and the positioning hole is provided with the shielding effectiveness enhancement layer. A positioning column is arranged at the top of the shell body, and the positioning hole is formed in the bottom of the shell body. According to the magnetic shielding shell of the stackable power supply module, the top and the bottom of the shell main body adopt complementary concave-convex groove design, the top is provided with a convex positioning column and a groove type electrical connection interface, and the bottom is correspondingly provided with a positioning hole matched with the positioning column and a convex type electrical connection plug. The electrical connection plug of the lower power module shell body can be accurately inserted into the electrical connection interface of the upper shell body, electrical connection between the power modules is achieved, and no extra connecting wire is needed.

Description

Technical Field

[0001] This utility model relates to the field of power module technology, specifically to a magnetic shielding shell for a stackable power module. Background Technology

[0002] As electronic devices become increasingly miniaturized and integrated, higher demands are placed on the performance and space utilization of power modules. Electromagnetic interference (EMI) is becoming increasingly prominent in power module applications. The electromagnetic radiation generated during power module operation not only affects its own normal operation but also interferes with the performance of other surrounding electronic devices. To address this issue, power modules are typically equipped with magnetically shielded enclosures.

[0003] Traditional magnetic shielding shells are mostly independently designed and do not have stacking capabilities. When multiple power modules are required, they can only be installed side by side, which takes up a lot of space and cannot meet the strict space requirements of miniaturized devices.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed a magnetic shielding shell for a stackable power module. Utility Model Content

[0005] The purpose of this invention is to provide a magnetically shielded housing for a stackable power module to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a magnetically shielded housing for a stackable power module, comprising a housing body and a positioning hole. The housing body includes a high-permeability metal layer, an insulating buffer layer, and a shielding effectiveness enhancement layer. The outer surface of the high-permeability metal layer is provided with an insulating buffer layer, and the outer surface of the insulating buffer layer is provided with a shielding effectiveness enhancement layer. A positioning post is provided on the top of the housing body, and an electrical connection interface is also provided on the top of the housing body. The positioning hole is located at the bottom of the housing body, and an electrical connection plug is also provided at the bottom of the housing body. Electromagnetic shielding sealant is provided at the edge of the top of the housing body, and heat dissipation adhesive is installed on the side of the housing body by screws, with heat dissipation fins provided on the heat dissipation adhesive.

[0007] Furthermore, the positioning posts are symmetrically distributed about the top center of the outer shell body, and there are four positioning posts.

[0008] Furthermore, the positioning holes are symmetrically distributed about the bottom center of the outer shell body, and there are four positioning holes.

[0009] Furthermore, the positioning post and positioning hole are cylindrical in shape, and the diameter and height of the positioning post and positioning hole are 5mm respectively.

[0010] Furthermore, the heat dissipation fins are equidistantly distributed along the length of the heat dissipation adhesive, and the heat dissipation fins are wavy.

[0011] Furthermore, an insulating support is provided inside the main body of the outer shell, and an electromagnetic shielding plate is installed on the insulating support by screws.

[0012] Furthermore, a rectangular opening is provided on the outer surface of the outer shell body, and electromagnetic shielding doors are hinged to both sides of the rectangular opening. Conductive rubber strips are provided at the edges of the electromagnetic shielding doors.

[0013] This utility model provides a magnetic shielding shell for a stackable power module, which has the following advantages:

[0014] 1. The top and bottom of the outer shell of this utility model adopt a complementary concave and convex groove design. The top is provided with a raised positioning post and a grooved electrical connection interface, and the bottom is provided with a positioning hole adapted to the positioning post and a raised electrical connection plug. When stacked, the electrical connection plug of the lower power module outer shell can be accurately inserted into the electrical connection interface of the upper outer shell, realizing the electrical connection between the power modules without the need for additional connection wires.

[0015] 2. The main body of the outer shell of this utility model adopts a multi-layer composite structure design, consisting of a high magnetic permeability metal layer, an insulating buffer layer, and a shielding effectiveness enhancement layer from the inside out. The high magnetic permeability metal layer is made of permalloy, which can effectively guide and constrain magnetic lines of force and reduce the intensity of electromagnetic radiation. The insulating buffer layer is made of polytetrafluoroethylene, which can isolate the high magnetic permeability metal layer from the internal power module and prevent short circuits. The shielding effectiveness enhancement layer is composed of graphene composite film and metal mesh layer alternately stacked. The graphene composite film has excellent electromagnetic shielding performance and flexibility, while the metal mesh layer further enhances the shielding effect. The composite structure formed by the alternating stacking of the two can absorb and reflect electromagnetic radiation in all directions, significantly improving the overall shielding effectiveness of the outer shell. Attached Figure Description

[0016] Figure 1 This is a top view of the magnetic shielding shell of a stackable power module according to the present invention.

[0017] Figure 2 This is a front view structural diagram of the magnetic shielding shell of a stackable power module according to the present invention.

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the magnetic shielding shell of a stackable power module according to this utility model.

[0019] In the diagram: 1. Outer shell; 101. High magnetic permeability metal layer; 102. Insulating buffer layer; 103. Shielding effectiveness enhancement layer; 2. Positioning post; 3. Electrical connection interface; 4. Positioning hole; 5. Electrical connection plug; 6. Electromagnetic shielding sealant; 7. Screw one; 8. Thermal adhesive; 9. Heat dissipation fins; 10. Insulating bracket; 11. Screw two; 12. Electromagnetic shielding partition; 13. Rectangular opening; 14. Electromagnetic shielding door; 15. Conductive rubber strip. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] like Figure 1 and Figure 2 As shown, a magnetically shielded housing for a stackable power module includes a housing body 1 and positioning holes 4. Positioning posts 2 are located on the top of the housing body 1, and an electrical connection interface 3 is also located on the top of the housing body 1. Positioning holes 4 are located on the bottom of the housing body 1, and an electrical connection plug 5 is also located on the bottom of the housing body 1. The positioning posts 2 are symmetrically distributed about the center of the top of the housing body 1, and there are four positioning posts 2. The positioning holes 4 are symmetrically distributed about the center of the bottom of the housing body 1, and there are four positioning holes 4. The positioning posts 2 and positioning holes 4 are cylindrical in shape, and their diameters are... The height is 5mm. Electromagnetic shielding sealant 6 is provided at the top edge of the main body 1. Heat dissipation adhesive 8 is installed on the side of the main body 1 by screw 7. Heat dissipation fins 9 are provided on the heat dissipation adhesive 8. The heat dissipation fins 9 are evenly distributed along the length of the heat dissipation adhesive 8 and are wavy. An insulating support 10 is provided inside the main body 1. An electromagnetic shielding partition 12 is installed on the insulating support 10 by screw 11. A rectangular opening 13 is opened on the outer surface of the main body 1. Electromagnetic shielding doors 14 are hinged on both sides of the rectangular opening 13. Conductive rubber strips 15 are provided at the edge of the electromagnetic shielding doors 14.

[0022] The specific operation is as follows: the top and bottom of the outer shell 1 adopt a complementary concave and convex groove design. The top is provided with a raised positioning post 2 and a grooved electrical connection interface 3. The bottom is provided with a positioning hole 4 that matches the positioning post 2 and a raised electrical connection plug 5. When stacked, the electrical connection plug 5 of the lower power module outer shell 1 can be accurately inserted into the electrical connection interface 3 of the upper outer shell 1 to realize the electrical connection between the power modules without the need for additional connecting wires.

[0023] like Figure 3As shown, the outer shell body 1 includes a high magnetic permeability metal layer 101, an insulating buffer layer 102, and a shielding effectiveness enhancement layer 103. The outer surface of the high magnetic permeability metal layer 101 is provided with the insulating buffer layer 102, and the outer surface of the insulating buffer layer 102 is provided with the shielding effectiveness enhancement layer 103.

[0024] The specific operation is as follows: The outer shell 1 adopts a multi-layer composite structure design, consisting of a high-permeability metal layer 101, an insulating buffer layer 102, and a shielding effectiveness enhancement layer 103 from the inside out. The high-permeability metal layer 101 is made of permalloy, which can effectively guide and constrain magnetic lines of force and reduce electromagnetic radiation intensity. The insulating buffer layer 102 is made of polytetrafluoroethylene, which can isolate the high-permeability metal layer 101 from the internal power module and prevent short circuits. The shielding effectiveness enhancement layer 103 is composed of graphene composite film and metal mesh layer alternately stacked. The graphene composite film has excellent electromagnetic shielding performance and flexibility, while the metal mesh layer further enhances the shielding effect. The composite structure formed by the alternating stacking of the two can absorb and reflect electromagnetic radiation in all directions, significantly improving the overall shielding effectiveness of the outer shell.

[0025] In summary, the magnetic shielding shell of this stackable power module, when in use, firstly, the main body 1 of the shell adopts a multi-layer composite structure design, consisting of a high-permeability metal layer 101, an insulating buffer layer 102, and a shielding effectiveness enhancement layer 103 from the inside out. The high-permeability metal layer 101 is made of permalloy, which can effectively guide and constrain magnetic lines of force and reduce the intensity of electromagnetic radiation. Its thickness is set to 0.5-1mm to ensure that the shielding effect is guaranteed without excessively increasing the weight and cost of the shell. The insulating buffer layer 102 is made of polytetrafluoroethylene, which can isolate the high-permeability metal layer 101 from the internal power module and prevent short circuits. The shielding effectiveness enhancement layer 103 is composed of graphene composite film and metal mesh layer alternately stacked. The graphene composite film has excellent electromagnetic shielding performance and flexibility, while the metal mesh layer further enhances the shielding effect. The composite structure formed by the alternating stacking of the two can absorb and reflect electromagnetic radiation in all directions, significantly improving the overall shielding effectiveness of the shell.

[0026] By fixing the power module inside the housing body 1, the input and output interfaces of the power module correspond to the rectangular opening 13. Since the electromagnetic shielding door 14 adopts the same multi-layer composite magnetic shielding structure as the housing body 1, and is tightly attached to the housing body 1 through the conductive rubber strip 15, it can ensure that the electromagnetic shielding function can be maintained in the closed state. Then, the electromagnetic shielding partition 12 is fixed in a suitable position using the insulating bracket 10 and screws 11 to ensure that the electromagnetic shielding partition 12 maintains good insulation performance between the housing body 1 and the power module.

[0027] When power modules need to be stacked, the electrical connection plug 5 at the bottom of the outer shell 1 of the upper power module is aligned with the electrical connection interface 3 at the top of the outer shell 1 of the lower power module and slowly inserted until the plug and interface are fully connected. The positioning post 2 is then embedded in the positioning hole 4 at the corresponding position, thereby ensuring that the outer shells 1 of the two power modules are accurately aligned and ensuring the stability of the stack. Moreover, the electrical connection plug 5 and the electrical connection interface 3 use spring pin connectors, which have good conductivity and reliable connection. Electrical connection between power modules can be achieved during stacking without the need for additional connecting wires, simplifying the connection process. At the same time, the seam between the upper and lower outer shells 1 is filled with electromagnetic shielding sealant 6, forming a continuous wire channel to prevent electromagnetic leakage. In addition, the wavy heat dissipation fins 9 are attached to the side of the outer shell 1 with heat dissipation adhesive 8, which can increase the heat dissipation surface area, improve heat dissipation efficiency, and solve the heat dissipation problem of power modules during stacking.

[0028] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A magnetically shielded housing for a stackable power module, comprising a housing body (1) and positioning holes (4), characterized in that, The outer shell body (1) includes a high magnetic permeability metal layer (101), an insulating buffer layer (102) and a shielding effectiveness enhancement layer (103). The outer surface of the high magnetic permeability metal layer (101) is provided with an insulating buffer layer (102), and the outer surface of the insulating buffer layer (102) is provided with a shielding effectiveness enhancement layer (103). The top of the outer shell body (1) is provided with a positioning post (2), and the top of the outer shell body (1) is also provided with an electrical connection interface (3). The positioning hole (4) is opened at the bottom of the outer shell body (1), and the bottom of the outer shell body (1) is also provided with an electrical connection plug (5). The edge of the top of the outer shell body (1) is provided with electromagnetic shielding sealant (6), and the side of the outer shell body (1) is installed with heat dissipation adhesive (8) by screw (7). Heat dissipation fins (9) are provided on the heat dissipation adhesive (8).

2. The magnetic shielding shell of a stackable power module according to claim 1, characterized in that, The positioning posts (2) are symmetrically distributed about the top center of the outer shell body (1), and there are four positioning posts (2).

3. The magnetic shielding shell of a stackable power module according to claim 1, characterized in that, The positioning holes (4) are symmetrically distributed about the bottom center of the outer shell body (1), and there are four positioning holes (4).

4. The magnetic shielding shell of a stackable power module according to claim 1, characterized in that, The positioning post (2) and positioning hole (4) are cylindrical in shape, and the diameter and height of the positioning post (2) and positioning hole (4) are 5mm respectively.

5. The magnetic shielding shell of a stackable power module according to claim 1, characterized in that, The heat dissipation fins (9) are evenly distributed along the length of the heat dissipation adhesive (8), and the heat dissipation fins (9) are wavy.

6. The magnetic shielding shell of a stackable power module according to claim 1, characterized in that, An insulating support (10) is provided inside the outer shell body (1), and an electromagnetic shielding plate (12) is installed on the insulating support (10) by screw two (11).

7. The magnetic shielding shell of a stackable power module according to claim 1, characterized in that, The outer surface of the outer shell body (1) is provided with a rectangular opening (13), and electromagnetic shielding doors (14) are hinged on both sides of the rectangular opening (13). Conductive rubber strips (15) are provided at the edges of the electromagnetic shielding doors (14).

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