A capacitor
By using a structure in which an insulating plastic shell is embedded inside a metal shell in the capacitor, and using filler to fix the core and pins, efficient heat dissipation is achieved, solving the problem of performance degradation and shortened lifespan caused by heat in capacitors, and improving production efficiency and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN FARATRONIC
- Filing Date
- 2025-04-16
- Publication Date
- 2026-07-07
AI Technical Summary
Capacitors generate significant heat in high-frequency, high-current circuits, leading to elevated temperatures that affect performance and lifespan. Furthermore, existing heat dissipation structures are insufficient, potentially causing breakdown or combustion.
The structure adopts a metal shell with an embedded insulating plastic shell. The insulating plastic shell is embedded in the metal shell to form a fixed connection. The core, pins, metal shell and insulating plastic shell are fixed by filler material. The insulating plastic shell has an opening to expose the core so that heat can be conducted to the metal shell for heat dissipation.
It improves the heat dissipation performance and production efficiency of capacitors, has a simple structure, is suitable for automated production, extends the service life of capacitors, and reduces the risk of failure.
Smart Images
Figure CN224472335U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic technology, specifically to a capacitor. Background Technology
[0002] Capacitors are frequently used in high-frequency, high-current circuits, especially high-power-density circuits. The large current flowing through the PCB causes a significant increase in the heat generated by the various electronic components on the PCB. Furthermore, the increasing integration and miniaturization requirements of electronic devices further raise the ambient temperature within the equipment, leading to a rise in the capacitor temperature.
[0003] Excessive capacitor temperature can reduce capacitor performance and lifespan, and in severe cases, even lead to capacitor breakdown and combustion. Therefore, capacitors that generate significant heat require special heat dissipation structures to ensure their reliability and extend their lifespan. Utility Model Content
[0004] The present invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, the purpose of this invention is to provide a capacitor with a simple structure, good heat dissipation performance, and suitability for automated production lines.
[0005] To achieve the above objectives, this utility model proposes a capacitor comprising:
[0006] A metal shell for heat dissipation of the core, the metal shell being hollow to form a first receiving cavity, the top of the first receiving cavity having a first opening.
[0007] An insulating plastic shell for securing a core is provided, the insulating plastic shell being hollow to form a second receiving cavity for securing the core, the second receiving cavity having second openings on its sides and bottom for exposing the core, and a third opening on its top for the core's pins to extend out, the insulating plastic shell being able to be inserted into the first receiving cavity from the first opening and to form a connection with the metal shell, so that the second receiving cavity is secured within the first receiving cavity;
[0008] A filler material is filled into the first receiving cavity to keep the core, the pins, the metal shell, and the insulating plastic shell relatively fixed.
[0009] According to this utility model, a capacitor is constructed by embedding an insulating plastic shell within a metal shell, forming a fixed connection. This secures the core within the metal shell, creating insulation between the core and the metal shell. A filler material fills and fixes the core, leads, insulating plastic shell, and metal shell. A second opening in the insulating plastic shell exposes the core, allowing heat generated by the core to be conducted through the filler material to the outer metal shell for dissipation. The assembly of the insulating plastic shell embedded within the metal shell can be automated, improving production efficiency. The large outer metal shell significantly enhances heat dissipation. This capacitor has a simple structure, good heat dissipation performance, and is suitable for automated production lines.
[0010] In addition, the capacitor proposed according to the above embodiments of this utility model may also have the following additional technical features:
[0011] Optionally, the insulating plastic shell and the metal shell are nested and connected.
[0012] Furthermore, the insulating plastic shell is provided with an annular groove, which is fitted onto the metal shell at the first opening.
[0013] Optionally, the insulating plastic shell is provided with lead slots to accommodate the pins of the core.
[0014] Furthermore, the entrance of the lead groove is provided with a guide structure that can guide the pins of the core into the lead groove.
[0015] Optionally, the second opening on the side of the second receiving cavity and the second opening at the bottom of the second receiving cavity are connected.
[0016] Furthermore, the cross-section of the metal shell is square.
[0017] Furthermore, the cross-section of the metal shell is circular. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of a square capacitor according to an embodiment of the present invention;
[0019] Figure 2 This is a schematic diagram of the structure of the square metal shell according to an embodiment of the present utility model;
[0020] Figure 3 This is a schematic diagram of the square insulating plastic shell and core according to an embodiment of the present utility model;
[0021] Figure 4 This is a structural schematic diagram of a square insulating plastic shell according to an embodiment of the present utility model;
[0022] Figure 5 for Figure 4 A structural diagram from another perspective;
[0023] Figure 6 This is a schematic diagram of the structure of a circular capacitor according to an embodiment of the present invention;
[0024] Figure 7 This is a schematic diagram of the structure of the insulating plastic shell and core according to an embodiment of the present utility model;
[0025] Figure 8 This is a schematic diagram of the structure of the circular metal shell according to an embodiment of the present utility model;
[0026] Figure 9 This is a schematic diagram of the structure of a circular insulating plastic shell according to an embodiment of the present utility model;
[0027] Explanation of reference numerals in the attached figures:
[0028] Metal shell 1, first receiving cavity 11, first opening 12;
[0029] 2. Insulating plastic shell, 21. Second receiving cavity, 22. Second opening, 23. Third opening, 24. Annular groove, 25. Lead wire groove, 26. Guide structure;
[0030] Core 3, pin 31. Detailed Implementation
[0031] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0032] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0033] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0034] The following is for reference. Figures 1-9 The implementation of the capacitor proposed in the embodiments of this utility model will be described in detail.
[0035] The capacitor according to an embodiment of the present invention includes:
[0036] The metal shell 1 is used for heat dissipation of the core 3. The metal shell 1 is hollow to form a first receiving cavity 11. The top of the first receiving cavity 11 is provided with a first opening 12.
[0037] An insulating plastic shell 2 is used to fix the core 3. The insulating plastic shell 2 is hollow to form a second receiving cavity 21 for fixing the core 3. The side and bottom of the second receiving cavity 21 are provided with a second opening 22 for exposing the core 3. The top of the second receiving cavity 21 is provided with a third opening 23 for the pins 31 of the core 3 to extend out. The insulating plastic shell 2 can be inserted into the first receiving cavity 11 from the first opening 12 and form a connection with the metal shell 1 so that the second receiving cavity 21 is fixed in the first receiving cavity 11.
[0038] A filler (not shown) is used to fill the third opening 23 so that the pins 31 of the core 3 remain relatively fixed to the insulating plastic shell 2.
[0039] In other words, the insulating plastic shell 2 is provided with a second receiving cavity 21 for installing the core 3. The side and bottom of the second receiving cavity 21 are provided with a second opening 22 communicating with the second receiving cavity 21. The top of the second receiving cavity 21 is provided with a third opening 23 for the pins 31 of the core 3 to extend out. The metal shell 1 is provided with a first receiving cavity 11. The first receiving cavity 11 is provided with a first opening 12 communicating with the first receiving cavity 11. The insulating plastic shell 2 can be inserted into the first receiving cavity 11 through the first opening 12, so that the second receiving cavity 21 is located in the first receiving cavity 11. When the insulating plastic shell 2 is inserted into the metal shell 1, a fixed connection can be formed. After the insulating plastic shell 2 is connected to the metal shell 1, the core 3 is installed in the second receiving cavity 21 through the third opening 23, forming the installation and fixation of the core 3. Then, the first cavity is filled and sealed with filler material, thereby forming a relative fixation between the core 3, the pins 31, the metal shell 1 and the insulating plastic shell 2. When the capacitor is working, the heat generated by the core 3 is conducted to the outer metal shell 1 through the second opening 22 and dissipated. The second receiving cavity 21 can be used to fix the core 3 by making partial contact with the side and bottom surfaces of the core 3. The insulating plastic shell 2 and the metal shell 1 can be connected by nesting or by snap-fit. The metal shell 1 can be aluminum, brass or steel. The insulating plastic shell 2 can be PPS, PBT, PC, PP or nylon. The metal shell 1 can be square or cylindrical. The filler can be resin.
[0040] Therefore, by embedding the insulating plastic shell 2 within the metal shell 1 and forming a relatively fixed connection with the metal shell 1, the core 3 is fixed within the metal shell 1 by the insulating plastic shell 2, and insulation is formed between the core 3 and the metal shell 1. The core 3, leads 31, insulating plastic shell 2, and metal shell 1 are filled and fixed by filler material. The insulating plastic shell 2 has a second opening 22 exposing the core 3, allowing the heat generated by the core 3 to be conducted through the second opening 22 via the filler material to the outer metal shell 1 for dissipation. The assembly of the insulating plastic shell 2 embedded within the metal shell 1 can be automated, improving production efficiency, and the large area of the outer metal shell 1 significantly enhances heat dissipation. This capacitor has a simple structure, good heat dissipation performance, and is conducive to automated production lines.
[0041] Optionally, the insulating plastic shell 2 and the metal shell 1 are nested together. Understandably, this nested connection simplifies the connection structure between the insulating plastic shell 2 and the metal shell 1, and facilitates automated operation, improving production efficiency. Specifically, the portion of the insulating plastic shell 2 embedded within the metal shell 1 may be connected to the inner wall of the metal shell 1 via a transition fit or interference fit, or it may only be connected to the inner wall of the metal shell 1 via a transition fit or interference fit at the first opening 12.
[0042] Furthermore, the insulating plastic shell 2 is provided with an annular groove 24, which is fitted onto the metal shell 1 at the first opening 12. Understandably, the annular groove 24 in the insulating plastic shell 2 facilitates the fitting of the annular groove 24 onto the first opening 12 of the metal shell 1 when the insulating plastic component is embedded within it, forming a compression connection between the inner and outer walls of the metal shell 1. Simultaneously, the top of the annular groove 24 also limits the depth to which the insulating plastic shell 2 is embedded within the metal shell 1. The annular groove 24 can be integrally formed on the insulating plastic shell 2, and its cross-section can be U-shaped. The shape of the annular groove 24 can be matched to the shape of the first opening 12 of the metal shell 1.
[0043] Optionally, the insulating plastic shell 2 is provided with lead grooves 25 to accommodate the pins 31 of the core 3. Understandably, the lead grooves 25 facilitate the accommodating of the pins 31 of the core 3, allowing the core 3 to be easily inserted into the second receiving cavity 21 through the third opening 23, while also limiting the swaying of the core 3. The number of lead grooves 25 can be one or two, depending on the lead-out position and number of pins 31 of the core 3. The lead grooves 25 can be formed by a vertical indentation in the inner wall of the insulating plastic shell 2.
[0044] Furthermore, the entrance of the lead groove 25 is provided with a guide structure 26 that guides the pins 31 of the core 3 into the lead groove 25. Understandably, the guide structure 26 facilitates the rapid insertion of the core 3 into the second receiving cavity 21 under its guidance, improving installation efficiency. The guide structure 26 may be V-shaped.
[0045] Optionally, the second opening 22 on the side of the second receiving cavity 21 and the second opening 22 at the bottom of the second receiving cavity 21 are connected. Understandably, by connecting the second openings 22, the exposed area of the core 3 within the second receiving cavity 21 is increased, facilitating the rapid conduction of heat generated by the core 3 to the metal shell 1 for heat dissipation. In other words, the connection of the insulating plastic shell 2 through the second openings 22 ensures that the insulating plastic shell 2 only partially contacts the sides and bottom of the core 3, maximizing the exposed area of the core 3 and thus improving heat dissipation performance.
[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.
[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A capacitor, characterized in that, include: A metal shell for heat dissipation of the core, wherein the metal shell is hollow to form a first receiving cavity, and the top of the first receiving cavity is provided with a first opening; An insulating plastic shell for securing a core is provided, the insulating plastic shell being hollow to form a second receiving cavity for securing the core, the second receiving cavity having second openings on its sides and bottom for exposing the core, and a third opening on its top for the core's pins to extend out, the insulating plastic shell being able to be inserted into the first receiving cavity from the first opening and to form a connection with the metal shell, so that the second receiving cavity is secured within the first receiving cavity; A filler material is filled into the first receiving cavity to keep the core, the pins, the metal shell, and the insulating plastic shell relatively fixed.
2. The capacitor as claimed in claim 1, characterized in that, The insulating plastic shell and the metal shell are nested and connected.
3. The capacitor as described in claim 2, characterized in that, The insulating plastic shell has an annular groove, which is fitted onto the metal shell at the first opening.
4. The capacitor as claimed in claim 1, characterized in that, The insulating plastic shell is provided with lead slots to accommodate the pins of the core.
5. The capacitor as claimed in claim 4, characterized in that, The entrance of the lead groove is provided with a guide structure that can guide the pins of the core into the lead groove.
6. The capacitor as claimed in claim 1, characterized in that, The second opening on the side of the second receiving cavity and the second opening at the bottom of the second receiving cavity are connected.