A thin film capacitor

Abstract

The utility model relates to the technical field of electronic components, and disclose a film capacitor, including capacitor main part configuration has aluminium shell and core subassembly, aluminium shell inside is provided with core subassembly, and core subassembly is the core component of capacitor realization capacitance function, the opening end of aluminium shell is provided with the rubber sealing plug for sealing, is provided with positive electrode lead and negative electrode lead on the rubber sealing plug, and positive electrode lead and negative electrode lead all are electrically connected with core subassembly. The utility model discloses through setting up auxiliary heat abstractor, and the heat of aluminium shell is conducted fast by outer heat conduction film, and the heat is further diffused by heat conduction copper sleeve, while annular heat dissipation groove and heat dissipation hole increase the heat dissipation area and promote heat exchange, and cooperate with the strip -shaped heat dissipation groove of aluminium shell top, improve the heat dissipation performance of capacitor in many aspects, effectively reduce capacitor operating temperature, guarantee the capacitance stability and service life.

Description

Technical Field

[0001] This utility model relates to the field of electronic component technology, specifically to a thin-film capacitor. Background Technology

[0002] Film capacitors, as common electronic components, are widely used in circuits for filtering, coupling, and bypassing, providing crucial capacitance functions for electronic devices. However, existing film capacitors have the following shortcomings: First, the heat generated during operation tends to accumulate internally. Current heat dissipation designs are simple, leading to increased capacitor temperature, which affects capacitor stability and accuracy, and shortens its lifespan. Second, the sealing structure has poor reliability; prolonged use or exposure to vibration can cause electrolyte leakage at the seal, resulting in capacitor failure and interfering with the normal operation of electronic equipment. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a thin-film capacitor that solves the problems of poor heat dissipation and insufficient sealing reliability of existing thin-film capacitors by setting auxiliary heat dissipation components and a reliable sealing structure.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a thin-film capacitor, comprising a capacitor body, wherein the capacitor body is configured with an aluminum shell and a core assembly.

[0007] The aluminum casing houses a core assembly, which is the core component for the capacitor to perform its capacitance function. A rubber sealing plug is installed at the open end of the aluminum casing to effectively seal the opening and reduce the risk of electrolyte leakage. A positive and negative lead are threaded through the rubber sealing plug, and both leads are electrically connected to the core assembly, facilitating the extraction of electrical signals from the core assembly.

[0008] The core assembly includes a negative electrode and a positive electrode aluminum foil made of paper impregnated with electrolyte. The positive electrode aluminum foil is electrically connected to a positive electrode lead, and the negative electrode is electrically connected to a negative cathode lead aluminum foil and a negative electrode lead. The positive electrode lead is connected to a positive electrode wire, and the negative electrode lead is connected to a negative electrode wire. The negative electrode and the positive electrode aluminum foil cooperate to form a capacitor structure.

[0009] An auxiliary heat dissipation component is fitted on the outer side of the aluminum shell to accelerate heat dissipation; a sealing ring is fixedly installed at the open end of the rubber sealing plug to enhance the sealing performance between the rubber sealing plug and related components; a strip-shaped heat dissipation groove is opened at the top of the aluminum shell to increase the heat dissipation area at the top of the aluminum shell.

[0010] As a further embodiment of this utility model: the auxiliary heat dissipation component includes an outer thermally conductive film sleeved on the outer wall of the aluminum shell, the outer thermally conductive film having good thermal conductivity and being able to quickly conduct heat from the aluminum shell; the outer wall of the outer thermally conductive film is sleeved with a thermally conductive copper sleeve, the thermally conductive copper sleeve further enhancing the heat conduction and diffusion capabilities.

[0011] As a further improvement of this utility model: the annular outer wall of the heat-conducting copper sleeve is provided with multiple annular heat dissipation grooves at equal intervals from top to bottom. The annular heat dissipation grooves increase the contact area between the heat-conducting copper sleeve and the air, thereby improving the heat dissipation efficiency. The heat-conducting copper sleeve is provided with heat dissipation holes that communicate with the interior of the aluminum shell. There are multiple heat dissipation holes arranged at equal angles, which facilitates the heat exchange between the interior of the aluminum shell and the external air.

[0012] As a further improvement of this utility model: the external thermal conductive film is a graphite thermal conductive film, which has excellent thermal conductivity and can efficiently transfer heat.

[0013] As a further improvement of this utility model, the number of the strip-shaped heat dissipation grooves is three, and the three strip-shaped heat dissipation grooves are evenly distributed along the circumference of the top of the aluminum shell. The evenly distributed strip-shaped heat dissipation grooves can make the heat at the top of the aluminum shell dissipate more evenly.

[0014] As a further improvement of this utility model: the positive lead and the negative lead pass through the sealing ring on their corresponding sides, and the sealing ring seals the passage of the positive lead and the negative lead to the rubber sealing plug to prevent electrolyte leakage from that position.

[0015] As a further improvement of this utility model, the sealing ring is a rubber sealing ring, and the sealing ring and the open end of the rubber sealing plug are interference-fitted. The interference-fitted rubber sealing ring can form a more reliable sealing structure and further improve the sealing effect.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, by setting up auxiliary heat dissipation components, the outer thermal conductive film quickly conducts the heat of the aluminum shell, and the thermal conductive copper sleeve further diffuses the heat; at the same time, the annular heat dissipation groove and heat dissipation hole increase the heat dissipation area and promote heat exchange, and together with the strip heat dissipation groove at the top of the aluminum shell, the heat dissipation performance of the capacitor is improved in many ways, effectively reducing the working temperature of the capacitor and ensuring the stability and service life of the capacitor.

[0018] 2. In this utility model, by setting a sealing ring that is interference-fitted with the rubber sealing plug at the open end of the rubber sealing plug, and the sealing ring sealing the passage of the positive and negative leads, a reliable sealing structure is formed, which greatly reduces the risk of electrolyte leakage and improves the reliability and service life of the capacitor. Attached Figure Description

[0019] Figure 1 This is a perspective view of the entire utility model;

[0020] Figure 2 The three-dimensional capacitor body of this utility model Figure 1 ;

[0021] Figure 3 The three-dimensional capacitor body of this utility model Figure 2 ;

[0022] Figure 4 This is a partial cross-sectional perspective view of the capacitor body of this utility model;

[0023] Figure 5 This is a perspective view of the core component of this utility model.

[0024] In the diagram: 1. Capacitor body; 2. Outer thermally conductive film; 3. Thermally conductive copper sleeve; 4. Annular heat dissipation groove; 5. Heat dissipation hole; 11. Aluminum shell; 12. Core assembly; 13. Rubber sealing plug; 14. Positive lead; 15. Negative lead; 16. Sealing ring; 17. Strip heat dissipation groove; 121. Negative electrode; 122. Positive aluminum foil; 123. Positive lead; 124. Negative cathode lead-out aluminum foil; 125. Negative lead. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship 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 do not 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. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figures 1-5 In this embodiment of the present invention, a thin-film capacitor includes a capacitor body 1, which is provided with an aluminum shell 11 and a core assembly 12.

[0029] The aluminum casing 11 houses a core assembly 12, which is the core component for realizing the capacitor's capacitance function. A rubber sealing plug 13 is provided at the open end of the aluminum casing 11 for sealing. The rubber sealing plug 13 can effectively seal the open end of the aluminum casing 11, reducing the risk of electrolyte leakage. A positive lead 14 and a negative lead 15 are threaded through the rubber sealing plug 13, and both the positive lead 14 and the negative lead 15 are electrically connected to the core assembly 12, facilitating the extraction of electrical signals from the core assembly 12.

[0030] The core assembly 12 includes a negative electrode 121 and a positive electrode aluminum foil 122 made of paper impregnated with electrolyte. The positive electrode aluminum foil 122 is electrically connected to a positive electrode pin 123. The negative electrode 121 is electrically connected to a negative cathode lead-out aluminum foil 124 and a negative electrode pin 125. The positive electrode pin 123 is connected to a positive electrode lead 14, and the negative electrode pin 125 is connected to a negative electrode lead 15. The negative electrode 121 and the positive electrode aluminum foil 122 cooperate to form a capacitor structure.

[0031] An auxiliary heat dissipation component is fitted on the outside of the aluminum shell 11 to accelerate the heat dissipation of the aluminum shell 11; a sealing ring 16 is fixedly installed at the open end of the rubber sealing plug 13 to enhance the sealing performance between the rubber sealing plug 13 and related components; a strip-shaped heat dissipation groove 17 is opened at the top of the aluminum shell 11 to increase the heat dissipation area at the top of the aluminum shell 11.

[0032] The auxiliary heat dissipation component includes an outer thermal conductive film 2 fitted on the outer wall of the aluminum shell 11. The outer thermal conductive film 2 has good thermal conductivity and can quickly conduct heat from the aluminum shell 11. A thermal conductive copper sleeve 3 is fitted on the outer wall of the outer thermal conductive film 2, which further enhances the heat conduction and diffusion capabilities.

[0033] The annular outer wall of the heat-conducting copper sleeve 3 is provided with multiple annular heat dissipation grooves 4 at equal intervals from top to bottom. The annular heat dissipation grooves 4 increase the contact area between the heat-conducting copper sleeve 3 and the air, thereby improving the heat dissipation efficiency. The heat-conducting copper sleeve 3 is provided with heat dissipation holes 5 that are connected to the inside of the aluminum shell 11. There are multiple heat dissipation holes 5, which are arranged at equal angles. The heat dissipation holes 5 facilitate the heat exchange between the inside of the aluminum shell 11 and the outside air.

[0034] The external thermal conductive film 2 is a graphite thermal conductive film, which has excellent thermal conductivity and can efficiently transfer heat.

[0035] There are three strip-shaped heat dissipation slots 17. The three strip-shaped heat dissipation slots 17 are evenly distributed around the top of the aluminum shell 11. The evenly distributed strip-shaped heat dissipation slots 17 can make the heat at the top of the aluminum shell 11 dissipate more evenly.

[0036] The positive lead 14 and the negative lead 15 pass through the sealing ring 16 on their respective sides. The sealing ring 16 seals the passage of the positive lead 14, the negative lead 15 and the rubber sealing plug 13 to prevent electrolyte leakage from that location.

[0037] The sealing ring 16 is a rubber sealing ring, and the sealing ring 16 is interference-fitted with the open end of the rubber sealing plug 13. The interference-fitted rubber sealing ring 16 can form a more reliable sealing structure and further improve the sealing effect.

[0038] The working principle of this utility model is as follows: When the film capacitor is working, the heat generated by the core assembly 12 is transferred to the aluminum shell 11. The heat of the aluminum shell 11 is quickly conducted to the thermally conductive copper sleeve 3 through the outer thermally conductive film 2. The thermally conductive copper sleeve 3 increases the contact area with the air by using the annular heat dissipation groove 4. At the same time, the heat dissipation hole 5 promotes the heat exchange between the inside and outside of the aluminum shell 11 and accelerates the heat dissipation. The strip heat dissipation groove 17 at the top of the aluminum shell 11 can also increase the heat dissipation area at the top and assist in the heat dissipation, thereby effectively reducing the overall temperature of the capacitor. On the other hand, the sealing ring 16 at the opening end of the rubber sealing plug 13 is interference-fitted with the rubber sealing plug 13 and seals the passage of the positive lead 14 and the negative lead 15, forming a reliable sealing structure to prevent the electrolyte inside the aluminum shell 11 from leaking from the rubber sealing plug 13 and ensure the reliable operation of the capacitor.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A thin-film capacitor, comprising a capacitor body (1) wherein the capacitor body (1) is configured with an aluminum housing (11) and a core assembly (12); characterized in that The aluminum shell (11) is provided with a core assembly (12) inside. The open end of the aluminum shell (11) is provided with a rubber sealing plug (13) for sealing. A positive lead (14) and a negative lead (15) are passed through the rubber sealing plug (13), and both the positive lead (14) and the negative lead (15) are electrically connected to the core assembly (12). The core assembly (12) includes a negative electrode (121) and a positive electrode aluminum foil (122) made of paper impregnated with electrolyte. The positive electrode aluminum foil (122) is electrically connected to a positive electrode pin (123). The negative electrode (121) is electrically connected to a negative cathode lead-out aluminum foil (124) and a negative electrode pin (125). The positive electrode pin (123) is connected to a positive electrode lead (14), and the negative electrode pin (125) is connected to a negative electrode lead (15). An auxiliary heat dissipation component is fitted on the outside of the aluminum shell (11), a sealing ring (16) is fixedly installed at the open end of the rubber sealing plug (13), and a strip-shaped heat dissipation groove (17) is opened at the top of the aluminum shell (11).

2. A thin film capacitor as defined in claim 1, wherein: The auxiliary heat dissipation component includes an outer thermally conductive film (2) fitted on the outer wall of an aluminum shell (11), and a thermally conductive copper sleeve (3) fitted on the outer wall of the outer thermally conductive film (2).

3. A thin film capacitor as defined in claim 2, wherein: The annular outer wall of the heat-conducting copper sleeve (3) is provided with multiple annular heat dissipation grooves (4) at equal intervals from top to bottom. The heat-conducting copper sleeve (3) is provided with heat dissipation holes (5) that communicate with the interior of the aluminum shell (11). There are multiple heat dissipation holes (5) and they are arranged at equal angles.

4. A thin film capacitor as defined in claim 2, wherein: The external thermally conductive film (2) is a graphite thermally conductive film.

5. The thin film capacitor of claim 1 wherein: The number of the strip heat dissipation grooves (17) is three, and the three strip heat dissipation grooves (17) are evenly distributed circumferentially along the top of the aluminum shell (11).

6. A thin film capacitor as defined in claim 1, wherein: The positive lead (14) and the negative lead (15) pass through the sealing ring (16) on their respective sides.

7. A thin film capacitor as defined in claim 1, wherein: The sealing ring (16) is a rubber sealing ring, and the sealing ring (16) and the open end of the rubber sealing plug (13) are interference fit.

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