Uncoupled double inductor

Abstract

The utility model discloses a non-coupling double inductor, which is an integrated packaging forming body with a metal battery core, and the metal battery core is respectively provided with a mounting bonding pad on the top surface and the bottom surface of a packaging magnetic shell. The metal battery core comprises two pre-bent formed copper sheets, each formed copper sheet is provided with a flat part located in the middle, a head raising part located at one end and a vertical tail part located at the other end, the flat parts of the two formed copper sheets are arranged side by side at intervals, and the head raising part of one formed copper sheet deviates by 180 degrees relative to the head raising part of the other formed copper sheet. According to the uncoupled double inductor, on the basis that integration is achieved, by means of the forming structure of the metal battery core, the assembling bonding pads are formed on the top face and the bottom face of the inductor, welding is carried out, and the space occupied by the inductor in a power module is effectively saved; the design requirements of intensification and miniaturization of the power module are met, and popularization, application and development of AI servers, AI data centers, automotive electronics, smart transportation, cities and other industries are facilitated.

Description

Technical Field

[0001] The utility model relates to an inductor device, in particular to an inductor device which is beneficial to saving occupied space in a power module, and belongs to the technical field of basic electronic components. Background Art

[0002] Inductors are the most commonly used components in electronic devices and are widely used in various circuits to achieve the functions of filtering, energy storage, matching, and resonance. As electronic products become increasingly miniaturized and portable, and components are assembled with high density, inductor components have developed rapidly; and in consideration of electromagnetic compatibility, the ability of electronic products to resist electromagnetic interference has become a basic design requirement, which has increased the demand and application of inductors.

[0003] With the rapid development of digital high-speed computing and artificial intelligence, higher performance requirements have been put forward for hardware equipment. Without exception, the operation of these devices is inseparable from the power supply and power module. In terms of the circuit design of the power module, performance leaps are constantly being pursued. For the limited module volume and hundreds of integrated electronic components, the spatial layout, heat distribution, and heat dissipation speed of each electronic component have become the main design challenges. Inductors are an indispensable and widely used electronic component. However, the shape and structure of traditional inductors are difficult to adapt to vertical power supply, and they occupy a considerable area when laid flat. Summary of the invention

[0004] In view of the above-mentioned defects in the prior art, the purpose of the utility model is to provide a non-coupled dual inductor to adapt to the vertical power supply in the power module circuit design.

[0005] The technical solution of the utility model to achieve the above object is: a non-coupled dual inductor, which is an integrated packaged body with a metal core, and the metal core is formed with mounting pads on the top and bottom surfaces of the package magnetic shell.

[0006] Furthermore, the metal battery core is two pre-bent formed copper sheets, each of which has a flat portion in the middle, a tilted portion at one end and a vertical tail portion at the other end, the flat portions of the two formed copper sheets are arranged side by side and spaced apart, and the tilted portion of one formed copper sheet is biased by 180° relative to the tilted portion of the other formed copper sheet.

[0007] Furthermore, a packaging magnetic shell solidified from magnetic powder is provided on the periphery of the metal electric core, and the packaging magnetic shell has a square shape.

[0008] Furthermore, the raised head portion and the vertical tail portion are exposed on both the top and bottom surfaces of the block body as pins.

[0009] Furthermore, the surface of the packaged magnetic shell is provided with a fully covered insulating paint, and the corresponding pin position is provided with a mounting pad formed by laser paint stripping and electroplating.

[0010] Furthermore, the mounting pads are distributed at opposite sides of the top and bottom surfaces of the package magnetic shell, and a mounting pad on the top surface and a mounting pad on the bottom surface farther away from the top surface correspond to a formed copper sheet in the metal battery core.

[0011] Compared with the prior art, the advantages of applying the uncoupled dual inductor of the utility model are reflected in: by setting two independent metal cores in one inductor, the dual inductors are integrated into a single device, and by utilizing the molding structure of the metal core, mounting pads are formed on the top and bottom sides of the inductor and welding is implemented, which effectively saves the space occupied by the inductor device in the power module; it meets the design requirements of intensive and miniaturized power modules, and is conducive to the promotion, application and development of multiple industries such as AI server terminals, AI data centers, automotive electronics, smart transportation and cities. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the assembly structure of the uncoupled dual inductor of the utility model. DETAILED DESCRIPTION

[0013] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0014] In order to increase the density of electronic components per unit area in the power module, especially the indispensable and commonly used inductors, the utility model designs and proposes a non-coupled dual inductor, and is dedicated to adapting to the vertical power supply in the power module circuit design.

[0015] like Figure 1The structure diagram of the preferred embodiment shows that the uncoupled dual inductor is an integrated packaged body with a metal core, and the metal core 1 is formed with mounting pads on the top and bottom surfaces of the package magnetic shell 2. As can be seen from the diagram, the spacing between the mounting pads is relatively large, whether on the top or bottom surface, which reduces the difficulty of welding the inductor to a certain extent. From the specific details, the metal core is two pre-bent copper sheets 11 and 12. Due to the same appearance and consistent process-related parameters, the formed copper sheets can be prefabricated in batches. Each formed copper sheet has a flat portion located in the middle, a tilted portion located at one end, and a vertical tail portion at the other end, that is, it is formed into a three-section structure by bidirectional bending. In the pre-assembly before the inductor is packaged, the flat portions of the two formed copper sheets are arranged side by side and spaced apart, and the tilted portion of one formed copper sheet is biased 180° relative to the tilted portion of the other formed copper sheet. That is to say, the two flat parts are coplanar and slightly spaced from each other, and from the perspective of the length extension direction of the flat parts, the head part of one formed copper sheet corresponds to the vertical tail part of the other formed copper plate at the same end, while the other end is similar, except that the lateral positions of the head part and the vertical tail part are interchanged.

[0016] On the basis of the above pre-assembly, the outer periphery of the metal core 1 is provided with a packaged magnetic shell 2 solidified by magnetic powder, the packaged magnetic shell 2 is in the shape of a block, and the head and tail of the metal core are exposed on the top and bottom sides of the block as pins 111 and 121. As a conventional process for inductors: From the optional molding process, the packaged magnetic shell can be selected from one or more mixtures of iron powder / FeSi / FeSiCr / FeSiAl / FeNi / amorphous / nanocrystalline, and cold pressed or hot pressed and baked in a prefabricated mold to form a rectangular shape. The molding pressure is between 8-10T / cm², and the curing is baked at 160-180℃ for 2-4 hours. It can also be a mixture of one or more mixtures of FeSi / FeNi / FeSiAl / amorphous / nanocrystalline, combined with silicone resin or silicone resin for high-temperature sintering, and then annealed at 350-750℃ for 1-2 hours under nitrogen protection.

[0017] After the semi-finished product is packaged, it is also necessary to provide a full-coverage insulating paint on the surface of the package magnetic shell 2, and the corresponding pin position is provided with a mounting pad formed by laser paint stripping and electroplating. Although from the perspective of the pre-assembly of the metal battery core, the two parts of the molded copper sheet have their own widths and do not touch each other, that is, the exposed area of ​​each pin is limited. However, due to the distribution of the pins, the molded mounting pad can be expanded with the help of the non-pin extension area of ​​another molded copper sheet to achieve a strip corresponding to the length of the short side of the package magnetic shell. As a result, the mounting pad will be distributed and formed at the opposite sides of the top and bottom surfaces of the package magnetic shell and will be greatly separated.

[0018] Furthermore, based on the shape of the pre-assembled metal core, the mounting pad on the top surface of the package magnetic shell and the mounting pad 31 on the bottom surface farther from the package magnetic shell correspond to a molded copper sheet 11 in the metal core. Similarly, the other pair of mounting pads 32 correspond to another molded copper sheet 12 in the metal core.

[0019] From the above detailed description of the preferred embodiment of the uncoupled dual inductor of the utility model, it can be seen that compared with the prior art, this solution has substantial characteristics and progress, and its technical effects are as follows: by setting two independent metal cores in one inductor, the dual inductors are integrated into a single device, and by utilizing the molding structure of the metal core, mounting pads are formed on the top and bottom sides of the inductor and welded, which effectively saves the space occupied by the inductor device in the power module; it meets the design requirements of intensive and miniaturized power modules, and is conducive to the promotion, application and development of multiple industries such as AI server terminals, AI data centers, automotive electronics, smart transportation and cities.

[0020] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. An uncoupled dual inductor, which is an integrally packaged body with a metal core, characterized in that: The metal core is formed with mounting pads on the top and bottom surfaces of the packaging magnetic shell.

2. The uncoupled dual inductor according to claim 1, characterized in that: The metal battery core is two pre-bent shaped copper sheets, each of which has a flat portion in the middle, a tilted portion at one end and a vertical tail portion at the other end. The flat portions of the two shaped copper sheets are arranged side by side and spaced apart, and the tilted portion of one shaped copper sheet is tilted 180° relative to the tilted portion of the other shaped copper sheet.

3. The uncoupled dual inductor according to claim 2, characterized in that: The outer periphery of the metal core is provided with a packaging magnetic shell solidified by magnetic powder, and the packaging magnetic shell has a square shape; the head portion and the tail portion are exposed on the top and bottom surfaces of the square body as pins.

4. The uncoupled dual inductor according to claim 3, characterized in that: The surface of the package magnetic shell is fully covered with insulating paint, and the corresponding pin position is provided with a mounting pad formed by laser paint stripping and electroplating.

5. The uncoupled dual inductor according to claim 4, characterized in that: The mounting pads are distributed at opposite sides of the top and bottom surfaces of the package magnetic shell, and a mounting pad on the top surface and a mounting pad on the bottom surface farther away from the top surface correspond to a formed copper sheet in the metal battery core.

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