High-sealing film capacitors

Abstract

This application provides a high-sealing film capacitor, comprising: a housing having an open end; a core package disposed within the housing; and a bridge, the bridge including a bridge body and a positioning assembly. The bridge body is disposed at the open end, and its terminals are connected to the core package. The positioning assembly includes two positioning elements respectively disposed on both radially opposite sides of the core package, wherein at least one of the positioning elements is an elastic positioning element that elastically abuts against the outer wall of the core package. The high-sealing film capacitor provided by this application positions the core package using the positioning assembly, preventing misalignment between the core package and the bridge, ensuring uniform thickness of the sealant filling the space between the outer wall of the core package and the housing, improving the sealing performance of the film capacitor, and also enhancing the compatibility of the positioning assembly.

Description

Technical Field

[0001] This utility model generally relates to the field of thin film capacitor technology, and specifically to a high-sealing thin film capacitor. Background Technology

[0002] Film capacitors consist of a housing, a core, and a bridge. The assembly process of a film capacitor is as follows: first, the terminals on the core and the bridge are manually soldered; then, the soldered core and the bridge are installed together into the housing; and finally, glue is poured into the housing to fill the gap between the housing and the core with sealant. The sealant can provide insulation, sealing, and other protection for the core.

[0003] However, during the manual welding of the core package and the cable tray, misalignment can easily occur in the middle of the core package and the middle of the cable tray. This results in uneven gaps between the outer wall of the core package and the outer shell when the welded core package and cable tray are installed inside the casing. Consequently, the thickness of the sealant filling the gap is uneven, affecting the sealing performance of the film capacitor. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a film capacitor with high sealing performance.

[0005] This application provides a highly sealed film capacitor, comprising:

[0006] The outer casing has an open end;

[0007] Core package, the core package is disposed inside the outer casing;

[0008] The cable tray includes a connected cable tray body and a positioning assembly. The cable tray body is located at an open end, and the wiring terminals of the cable tray body are connected to the core package. The positioning assembly includes two positioning elements respectively located on both sides of the core package in the radial direction, wherein at least one of the two positioning elements is an elastic positioning element, and the elastic positioning element elastically abuts against the outer wall of the core package.

[0009] Furthermore, the elastic positioning element includes an elastic positioning plate connected to the cable tray body, wherein the elastic positioning plate is inclined toward the core package in a direction away from the cable tray body.

[0010] Furthermore, the end of the elastic positioning plate away from the cable tray body is provided with an abutment post, and the axial direction of the abutment post is perpendicular to the axial direction of the core package.

[0011] Furthermore, the elastic positioning component also includes a first connecting plate, which is located on the side of the core package closer to the cable tray body, and the two ends of the first connecting plate are respectively connected to the cable tray body and the elastic positioning plate.

[0012] Furthermore, the positioning components are integrally connected to the cable tray body.

[0013] Furthermore, the two positioning elements include a fixed positioning element.

[0014] Furthermore, the fixing and positioning component includes a fixing and positioning surface, wherein the fixing and positioning surface is an arc surface and is fitted to the outer wall of the core package.

[0015] Furthermore, the fixing and positioning component includes a second connecting plate and a fixing and positioning plate. One end of the second connecting plate is connected to the cable tray body and the other end is connected to the fixing and positioning plate. The fixing and positioning plate is located on the side of the second connecting plate near the core package. The side of the fixing and positioning plate near the core package forms a fixing and positioning surface. A first glue-filling gap is formed between the second connecting plate and the outer wall of the core package.

[0016] Furthermore, the fixing and positioning component also includes a third connecting plate, which is located on the side of the core package closer to the cable tray body. The two ends of the third connecting plate are respectively connected to the second connecting plate and the cable tray body.

[0017] The high-sealing film capacitor provided in this application features a positioning component in the bridge tray. This positioning component positions the core package, preventing misalignment between the core package and the bridge tray. This ensures a uniform gap between the outer wall of the core package and the outer shell, resulting in a uniform thickness of the sealant filling the gap between the outer wall of the core package and the outer shell. This improves the sealing performance of the film capacitor. Furthermore, the positioning component includes an elastic positioning element that elastically abuts against the outer wall of the core package. This not only facilitates the assembly between the positioning component and the core package but also enhances the compatibility of the positioning component. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the cable tray structure provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the positioning and mating cable tray and core package provided in the embodiments of this application. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0022] Please refer to the attached document. Figure 1-2This application provides a high-sealing film capacitor, including a housing, a core 400, and a bridge. Both the core 400 and the housing are cylindrical. The housing has an open end. The bridge includes a connected bridge body 100 and a positioning component. The core 400 is located within the housing, and the bridge body 100 is snapped into the open end. Terminals on the core 400 and the bridge body 100 are connected. The positioning component positions the core 400, aligning its center with the center of the bridge body 100. This ensures the core 400 is centrally located within the housing, resulting in a uniform gap between the outer wall of the core 400 and the housing. The sealant filling this gap is of uniform thickness, preventing weak points in the sealant and improving the sealing performance of the film capacitor.

[0023] The positioning assembly includes two positioning elements, located on opposite sides of the core package 400 in the radial direction, for positioning the core package 400. At least one of the positioning elements is an elastic positioning element 200, which elastically abuts against the outer wall of the core package 400. This positioning assembly not only facilitates assembly between the positioning assembly and the core package 400, but also enables the positioning assembly to position the core package 400 even with certain radial dimensional errors, thus improving the compatibility of the positioning assembly.

[0024] The inner side of the opening end of the outer casing has two opposing slots. Both ends of the cable tray body 100 are screwed into the two slots and engage with them. The cable tray body 100 has positive and negative terminals spaced apart. A conductive strip is welded between one gold-plated surface of the core package 400 and the positive terminal, and a conductive strip is welded between the other gold-plated surface of the core package 400 and the negative terminal, thus realizing the electrical connection between the cable tray body 100 and the core package 400.

[0025] In some embodiments of this application, the elastic positioning member 200 includes an elastic positioning plate 210, which is located on the outer periphery of the core package 400 and connected to the cable tray body 100. Specifically, the elastic positioning plate 210 is inclined towards the core package 400 in a direction away from the cable tray body 100, and abuts against the outer wall of the core package 400. By providing the inclined elastic positioning plate 210, not only is the compatibility of the positioning components improved, but the contact area between the elastic positioning member 200 and the outer wall of the core package 400 is also reduced. This creates a second sealant gap between the elastic positioning member 200 and the outer wall of the core package 400, increasing the bonding area between the sealant and the core package 400 and improving the sealing and protective effect of the sealant on the core package 400.

[0026] Optionally, the end of the elastic positioning plate 210 away from the cable tray body 100 is provided with an abutment post 220. The axial direction of the abutment post 220 is perpendicular to the axial direction of the core package 400. The abutment post 220 is cylindrical and its surface is smooth. The elastic positioning plate 210 contacts the core package 400 through the abutment post 220, which can reduce the friction between the elastic positioning plate 210 and the core package 400.

[0027] Optionally, the elastic positioning member 200 further includes a first connecting plate 230, which is located on the side of the core package 400 near the cable tray body 100. The first connecting plate 230 is perpendicular to the axial direction of the core package 400, and its two ends are respectively connected to the cable tray body 100 and the elastic positioning plate 210. Optionally, the first connecting plate 230 and the cable tray body 100 are perpendicular to each other.

[0028] In some embodiments of this application, the positioning component is integrally connected to the cable tray body 100, that is, the cable tray structure can be formed by injection molding to simplify the cable tray structure.

[0029] In some embodiments of this application, the two positioning elements include a fixed positioning element 300, and the fixed positioning element 300 and the elastic positioning element 200 jointly position the core package 400.

[0030] Optionally, the fixing positioning member 300 includes a fixing positioning surface, wherein the fixing positioning surface is an arc surface and is fitted to the outer side wall of the core package 400 to increase the contact stability between the fixing positioning member 300 and the core package 400.

[0031] Optionally, the fixing and positioning component 300 includes a second connecting plate 310 and a fixing and positioning plate 320. One end of the second connecting plate 310 is connected to the cable tray body 100, and the other end is connected to the fixing and positioning plate 320. The fixing and positioning plate 320 is located on the side of the second connecting plate 310 near the core package 400, and the side of the fixing and positioning plate 320 near the core package 400 forms a fixing and positioning surface. A first adhesive-filling gap is formed between the second connecting plate 310 and the outer wall of the core package 400. The existence of the first adhesive-filling gap can reduce the contact area between the fixing and positioning component 300 and the core package 400, and increase the bonding area between the sealant and the core package 400, thereby improving the sealing and protective effect of the sealant on the core package 400.

[0032] Optionally, the fixing and positioning component 300 further includes a third connecting plate 330. The third connecting plate 330 is located on the side of the core package 400 near the cable tray body 100 and is perpendicular to the axis of the core package 400. The two ends of the third connecting plate 330 are respectively connected to the second connecting plate 310 and the cable tray body 100. The third connecting plate 330 and the cable tray body 100 are perpendicularly arranged, and the third connecting plate 330 and the first connecting plate 230 are located on opposite sides of the cable tray body 100 along the width direction.

[0033] Optionally, the cable tray body 100 is made of an insulating material, such as, but not limited to, polyester resin. The elastic positioning plate 210 is thin to have a certain elastic deformation capability, and its thickness is, for example, but not limited to, 0.5-1mm.

[0034] In some embodiments of this application, a metal sheet is embedded in the fixing and positioning member 300, with a portion of the metal sheet located in the fixing and positioning plate 310 and another portion extending to the third connecting plate 330. This arrangement improves the thermal conductivity of the fixing and positioning member 300 and enhances the heat dissipation performance of the film capacitor.

[0035] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships 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. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A high-sealing thin film capacitor, characterized by, include: The housing has an open end; A core package, wherein the core package is disposed within the outer casing; The cable tray includes a connected cable tray body and a positioning assembly. The cable tray body is disposed at the open end, and the wiring terminals of the cable tray body are connected to the core package. The positioning assembly includes two positioning elements respectively disposed on both sides of the core package in the radial direction. At least one of the two positioning elements is an elastic positioning element, and the elastic positioning element elastically abuts against the outer wall of the core package.

2. The high-sealing thin film capacitor according to claim 1, characterized by The elastic positioning element includes an elastic positioning plate connected to the cable tray body, wherein the elastic positioning plate is inclined toward the core package in a direction away from the cable tray body.

3. The high-sealing thin film capacitor according to claim 2, characterized by The elastic positioning plate has an abutment post at one end away from the cable tray body, and the axial direction of the abutment post is perpendicular to the axial direction of the core package.

4. The high-sealing film capacitor according to claim 2, characterized in that, The elastic positioning component further includes a first connecting plate, which is located on the side of the core package closer to the cable tray body. The two ends of the first connecting plate are respectively connected to the cable tray body and the elastic positioning plate.

5. The high-sealing film capacitor according to claim 1, characterized in that, The positioning component is integrally connected to the cable tray body.

6. The high-sealing film capacitor according to any one of claims 1-5, characterized in that, The two positioning components include a fixed positioning component.

7. The high-sealing film capacitor according to claim 6, characterized in that, The fixing and positioning component includes a fixing and positioning surface, wherein the fixing and positioning surface is an arc surface and is fitted to the outer wall of the core package.

8. The high-sealing film capacitor according to claim 7, characterized in that, The fixing and positioning component includes a second connecting plate and a fixing and positioning plate. One end of the second connecting plate is connected to the cable tray body and the other end is connected to the fixing and positioning plate. The fixing and positioning plate is located on the side of the second connecting plate near the core package. The side of the fixing and positioning plate near the core package forms the fixing and positioning surface. A first glue-filling gap is formed between the second connecting plate and the outer wall of the core package.

9. The high-sealing film capacitor according to claim 8, characterized in that, The fixing and positioning component also includes a third connecting plate, which is located on the side of the core package closer to the cable tray body. The two ends of the third connecting plate are respectively connected to the second connecting plate and the cable tray body.

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