Ceramic capacitor double-shielding structure

Abstract

The utility model discloses a ceramic capacitor double-shielding structure, and the structure comprises a central shielding net which is of a tubular structure; the high-voltage parallel wires are wound on the outer wall of the central shielding net and are connected with the central shielding net; the high-voltage sides of the ceramic capacitors are respectively connected with the high-voltage parallel leads; the low-voltage parallel wires are wound on the plurality of ceramic capacitors and are respectively connected with the low-voltage sides of the plurality of ceramic capacitors; the high-voltage shielding net is respectively connected with the high-voltage sides of the plurality of ceramic capacitors and covers the high-voltage sides of the plurality of ceramic capacitors at the same time; and the low-voltage shielding net is respectively connected with the low-voltage sides of the plurality of ceramic capacitors and covers the low-voltage sides of the plurality of ceramic capacitors at the same time. By arranging the central shielding net, the high-voltage shielding net and the low-voltage shielding net, electric fields on the high-voltage side and the low-voltage side of the ceramic capacitor can be effectively shielded, and electric field distribution on the high-voltage side and the low-voltage side of the ceramic capacitor is effectively uniformized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic components, and in particular to a double shielding structure of a ceramic capacitor. BACKGROUND

[0002] In the field of secondary fusion electricity, ceramic capacitors are very important parts for measurement and energy extraction. In order to increase the external insulation of the ceramic capacitor, the ceramic capacitor is sealed in an epoxy part to form a module or product.

[0003] In order to prevent the ceramic capacitor from being disturbed during measurement or energy extraction, some shielding structure components are arranged on the ceramic capacitor. However, when the shielding structure components are formed, most of the existing multiple measurement or energy extraction ceramic capacitor elements are directly connected to high-voltage conductors, and the shrinkage stress is large. During the epoxy curing (VC vacuum pouring module, APG injection molding) process, the micro-cracks, gaps and other defects generated on the electrode surfaces of the two ends of the multiple measurement or energy extraction ceramic capacitor elements cause problems such as surface breakdown and partial discharge of the measurement or energy extraction ceramic capacitor elements, thereby affecting the electrical insulation performance of the epoxy part. CONTENT OF THE INVENTION

[0004] The purpose of the embodiment of the present application is to provide a double shielding structure of a ceramic capacitor, which comprises:

[0005] a center shielding net in a tubular structure;

[0006] a high-voltage parallel wire surrounding the outer wall of the center shielding net and connected to the center shielding net;

[0007] a plurality of ceramic capacitors, the high-voltage side of each ceramic capacitor being connected to the high-voltage parallel wire;

[0008] a low-voltage parallel wire surrounding the plurality of ceramic capacitors and connected to the low-voltage side of each ceramic capacitor;

[0009] a high-voltage shielding net connected to the high-voltage side of each ceramic capacitor and covering the high-voltage side of each ceramic capacitor;

[0010] a low-voltage shielding net connected to the low-voltage side of each ceramic capacitor and covering the low-voltage side of each ceramic capacitor.

[0011] As an optional embodiment, the plurality of ceramic capacitors are divided into multiple groups, and each group of ceramic capacitors is distributed in a circumferential direction along the center line of the center shielding net.

[0012] As an optional embodiment, the ceramic capacitors of two adjacent groups are staggered in the axial direction of the center shielding net.

[0013] As an optional embodiment, the edges of the upper and lower ends of the center shielding net are respectively inwardly rolled into the center shielding net to form a first rolled edge.

[0014] As an optional embodiment, one end of the high-voltage shielding net is connected with one end surface of the ceramic capacitor, and the other end thereof extends to the outer peripheral surface of the ceramic capacitor and is rolled at the end in a direction away from the low-voltage shielding net to form a second rolled edge.

[0015] As an optional embodiment, one end of the low-voltage shielding net is connected with the other end surface of the ceramic capacitor, and the other end thereof extends to the outer peripheral surface of the ceramic capacitor and is rolled at the end in a direction away from the high-voltage shielding net to form a third rolled edge.

[0016] As an optional embodiment, the spacing between the edge of the second rolled edge and the outer peripheral wall of the ceramic capacitor is greater than 1 mm, the spacing between the edge of the third rolled edge and the outer peripheral wall of the ceramic capacitor is greater than 1 mm, and the spacing between the second rolled edge and the third rolled edge is greater than 5 mm.

[0017] As an optional embodiment, the portion of the low-voltage parallel wire between two adjacent ceramic capacitors is in an arched structure.

[0018] As an optional embodiment, the ceramic capacitor double-shielding structure further comprises a secondary signal output wire connected with the low-voltage parallel wire for outputting a signal.

[0019] As an optional embodiment, an insulating layer is arranged on the outer peripheral wall of the secondary signal output wire.

[0020] The embodiment of the present application has the following beneficial effects:

[0021] The present application can effectively shield the electric field of the high-voltage and low-voltage sides of the ceramic capacitor by arranging the center shielding net, the high-voltage shielding net and the low-voltage shielding net, effectively uniform the electric field distribution of the high-voltage and low-voltage sides of the ceramic capacitor, solve the defects such as micro-cracks and gaps generated on the electrode surfaces of the two ends of the ceramic capacitor, introduce the high-strength points of the electric field of the high-voltage and low-voltage electrodes of the ceramic capacitor into the interior of the epoxy, and further reduce the problems such as surface breakdown and partial discharge of the ceramic capacitor, reduce the solidification internal stress in the VC vacuum casting module and APG injection molding process, and play an optimal electric field role. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a structural schematic diagram of a ceramic capacitor double-shielding structure according to an embodiment of the present application;

[0023] Figure 2 FIG. 2 is a sectional view of the connection between the ceramic capacitor and the high / low-voltage shielding net according to an embodiment of the present application;

[0024] Figure 3 Structure diagram of high-voltage shielding net of the embodiment of the present application;

[0025] Figure 4 Structure diagram of high-voltage shielding net of the embodiment of the present application;

[0026] Figure 5 Structure diagram of center shielding net of the embodiment of the present application.

[0027] wherein,

[0028] 1, center shielding net; 11, first hem; 2, high-voltage parallel conductor; 3, ceramic capacitor; 4, low-voltage parallel conductor; 5, high-voltage shielding net; 51, second hem; 6, low-voltage shielding net; 61, third hem; 7, secondary signal output line. DETAILED DESCRIPTION

[0029] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0030] It is to be understood that various alterations can be made to the embodiments described herein. Thus, the above description is not to be considered exhaustive, but rather is given as a representative example of the embodiments described herein. Those skilled in the art will recognize other modifications that can be made to the embodiments described herein without departing from the scope and spirit of the present application.

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and, together with the general description of the application given above, and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0032] These and other characteristics of the present application will become apparent upon consideration of the following detailed description taken in conjunction with the accompanying drawings.

[0033] It should also be understood that, although the present application has been described with reference to certain specific examples, various modifications thereof will be readily apparent to those skilled in the art without departing from the spirit and scope of the present application.

[0034] The above and other aspects, features, and advantages of the present application will become apparent upon consideration of the following detailed description taken in conjunction with the accompanying drawings, in which:

[0035] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it will be understood that the application is not limited to the specific embodiments described and shown herein, but includes various modifications and equivalents. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It is also to be understood that the use of "a", "an", "the", and similar language does not restrict the number of elements and / or components to a single element, but rather "a", "an", "the", and similar language mean "one or more".

[0036] The specification can use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in at least one embodiment," which can refer to one or more embodiments according to the present application.

[0037] The ceramic capacitor double shielding structure of the embodiment of the present application is suitable for VC vacuum pouring modules and APG injection molded epoxy parts. Figure 1 As shown in the figure, the ceramic capacitor double shielding structure includes a center shielding net 1, high-voltage parallel wires 2, ceramic capacitors 3, low-voltage parallel wires 4, a high-voltage shielding net 5, and a low-voltage shielding net 6.

[0038] As shown in the figure, the center shielding net 1 is a tubular structure, wherein a plurality of uniformly distributed rhombic openings are arranged on the tubular structure. Figure 5 The high-voltage parallel wires 2 are arranged around the outer wall of the center shielding net 1 and connected to the center shielding net 1. The high-voltage parallel wires 2 are annular structures.

[0039] The high-voltage sides of the plurality of ceramic capacitors 3 are respectively connected to the high-voltage parallel wires 2. The plurality of ceramic capacitors 3 are used for measurement or power taking, and the ceramic capacitors 3 are connected to the high-voltage parallel wires 2 by welding or crimping.

[0040] The low-voltage parallel wires 4 are arranged around the plurality of ceramic capacitors 3 and respectively connected to the low-voltage sides of the plurality of ceramic capacitors 3. The low-voltage parallel wires 4 are annular structures, and the ceramic capacitors 3 are connected to the low-voltage parallel wires 4 by welding or crimping.

[0041] The high-voltage shielding net 5 is respectively connected to the high-voltage sides of the plurality of ceramic capacitors 3 and simultaneously covers the high-voltage sides of the plurality of ceramic capacitors 3. The high-voltage shielding net 5 is in a bowl shape and has a plurality of uniformly distributed rhombic openings arranged on the bowl shape. The high-voltage shielding net 5 is connected to the high-voltage sides of the ceramic capacitors 3 by welding or crimping.

[0042] The low-voltage shielding net 6 is respectively connected to the low-voltage sides of the plurality of ceramic capacitors 3 and simultaneously covers the low-voltage sides of the plurality of ceramic capacitors 3. The low-voltage shielding net 6 is in a bowl shape and has a plurality of uniformly distributed rhombic openings arranged on the bowl shape. The low-voltage shielding net 6 is connected to the low-voltage sides of the ceramic capacitors 3 by welding or crimping.

[0043] In the embodiment, the plurality of ceramic capacitors 3 are measurement or power taking elements, which can realize the functions of measurement and power taking. For example, in the measurement module of a smart meter, the plurality of ceramic capacitors 3 can accurately measure current, voltage, and other parameters by different combination methods.

[0044] High-voltage parallel conductor 2 is used to connect the high-voltage side of multiple ceramic capacitors 3 to the central shielding mesh 1, connecting the high-voltage terminals of each ceramic capacitor 3 together so that they can work together to extract energy. Low-voltage parallel conductor 4 connects the low-voltage side of multiple ceramic capacitors 3, connecting the low-voltage terminals of the ceramic capacitors 3 together to ensure electrical connection on the low-voltage side.

[0045] The high-voltage shielding mesh 5 is connected to and covers the high-voltage side of multiple ceramic capacitors 3, shielding the electric field and other components on the high-voltage side of the ceramic capacitors 3. The low-voltage shielding mesh 6 is connected to and covers the low-voltage side of multiple ceramic capacitors 3, providing shielding protection for the low-voltage side.

[0046] In application, when the double-shielded structure of the ceramic capacitors is working, multiple ceramic capacitors 3 begin measurement or energy harvesting. The high-voltage side energy is transferred to each ceramic capacitor 3 via the high-voltage parallel conductor 2. The central shielding mesh 1 shields the internal electric field, reducing external interference. The high-voltage shielding mesh 5 shields the high-voltage side electric field to prevent leakage; the low-voltage shielding mesh 6 shields the low-voltage side electric field, ensuring low-voltage side stability. The low-voltage parallel conductor 4 connects the low-voltage sides of the multiple ceramic capacitors 3, maintaining the electrical connection on the low-voltage side.

[0047] This application reduces measurement errors caused by external electric field interference in the ceramic capacitor 3 by setting up a central shielding mesh 1, a high-voltage shielding mesh 5, and a low-voltage shielding mesh 6, thereby improving the accuracy of measurement or energy harvesting. Simultaneously, the parallel connection of multiple ceramic capacitors 3 enhances the stability and reliability of the structure.

[0048] The central shielding mesh 1, high-voltage shielding mesh 5, and low-voltage shielding mesh 6 of this application are all made of mesh metal material. Due to their relatively low rigidity, they are beneficial for the shrinkage of epoxy components. The high-voltage shielding mesh 5 and the low-voltage shielding mesh 6 have a symmetrical bowl-shaped structure, which is easy to connect with electrodes, and at the same time, the electric field is more uniform.

[0049] like Figure 1 As shown, in one embodiment, the plurality of ceramic capacitors 3 are divided into multiple groups, and each group of ceramic capacitors 3 is arranged in a ring around the center line of the central shielding mesh 1. That is, each group of ceramic capacitors 3 is distributed around the outer periphery of the central shielding mesh 1.

[0050] In this embodiment, multiple ceramic capacitors 3 are arranged in a circular pattern around the center line of the central shielding mesh 1. For example, with the central shielding mesh 1 as the axis, multiple ceramic capacitors 3 are evenly distributed on the circumference around it.

[0051] The grouped ceramic capacitors 3 perform measurements or energy harvesting at their respective circumferential positions around the central shielding mesh 1. The capacitors in different groups work together to further improve the efficiency and accuracy of measurement or energy harvesting.

[0052] The application makes the distribution of the ceramic capacitors 3 more reasonable, improves the space utilization, and the different groups of capacitors can simultaneously measure different areas or parameters, improving the comprehensiveness and accuracy of the measurement.

[0053] As shown in the drawings, Figure 1 In an embodiment, the ceramic capacitors 3 of the two adjacent groups are staggered along the axial direction of the central shielding net 1.

[0054] In this embodiment, the ceramic capacitors 3 of the two adjacent groups are staggered along the axial direction of the central shielding net 1 and are not in the same plane. For example, one group of ceramic capacitors 3 is located at the upper part of the central shielding net 1, and the other group is located at a lower position, and the two groups are also staggered in the circumferential direction.

[0055] The staggered ceramic capacitors 3 can avoid signal interference between each other, making the measurement or power taking process more stable. During measurement or power taking, different groups of capacitors work at different positions, reducing mutual influence. The application further reduces the mutual interference between the ceramic capacitors 3, improving the stability and accuracy of measurement or power taking.

[0056] As shown in the drawings, Figure 5 In an embodiment, the edges of the upper and lower ends of the central shielding net 1 are respectively rolled inward into the central shielding net 1 to form a first rolled edge 11.

[0057] In this embodiment, the upper and lower edges of the central shielding net 1 are rolled inward like a roll of paper, forming an inwardly rolled edge structure. The first rolled edge 11 can reduce the field strength at the end of the central shielding net 1, avoiding problems caused by field strength concentration, and at the same time shielding the conductor interface defects caused by the difference in capacitor contraction. During operation of the structure, the rolled edge can effectively disperse the electric field, protecting the central shielding net 1 and surrounding components.

[0058] The application enhances the shielding effect of the central shielding net 1, improves the safety and stability of the structure, and reduces the risk of failure caused by field strength concentration.

[0059] As shown in the drawings, Figures 2-4 In an embodiment, one end of the high-voltage shielding net 5 is connected to one end face of the ceramic capacitor 3, and the other end extends to the outer peripheral surface of the ceramic capacitor 3 and is rolled at the end in a direction away from the low-voltage shielding net 6 to form a second rolled edge 51.

[0060] In this embodiment, the high-voltage shielding net 5 is like a bowl, and the bowl opening edge is rolled outward, and this rolled part is the second rolled edge 51. The second rolled edge 51 can further optimize the shielding effect of the high-voltage shielding net 5, while maintaining a suitable distance from the ceramic capacitor 3, avoiding the influence of the shielding effect and electrical performance due to too close or too far distance. During operation, it can better guide and shield the high-voltage side electric field.

[0061] This application improves the shielding performance of the high-voltage shielding mesh 5, optimizes the electric field distribution, and ensures the electrical performance of the ceramic capacitor double-shielded structure.

[0062] like Figure 2 As shown, in one embodiment, one end of the low-voltage shielding mesh 6 is connected to the other end face of the ceramic capacitor 3, and the other end extends toward the outer peripheral surface of the ceramic capacitor 3 and is rolled up at the end in a direction away from the high-voltage shielding mesh 5 to form a third rolled edge 61.

[0063] In this embodiment, the low-voltage shielding mesh 6 resembles a bowl with its rim rolled outwards; this rolled-out portion is the third rolled edge 61. The third rolled edge 61 optimizes the shielding effect of the low-voltage shielding mesh 6, maintains a suitable distance from the ceramic capacitor 3, and stabilizes the low-voltage side electric field. During operation, it effectively shields the low-voltage side electric field, preventing external interference.

[0064] This application improves the shielding effect of the low-voltage shielding mesh 6, stabilizes the electric field on the low-voltage side, and enhances the stability of the entire structure.

[0065] In one embodiment, the distance between the edge of the second rolled edge 51 and the outer peripheral wall of the ceramic capacitor 3 is greater than 1 mm, the distance between the edge of the third rolled edge 61 and the outer peripheral wall of the ceramic capacitor 3 is greater than 1 mm, and the distance between the second rolled edge 51 and the third rolled edge 61 is greater than 5 mm.

[0066] In this embodiment, the distances between the edge of the second rolled edge 51 and the outer peripheral wall of the ceramic capacitor 3, the edge of the third rolled edge 61 and the outer peripheral wall of the ceramic capacitor 3, and the distances between the second rolled edge 51 and the third rolled edge 61 are limited. The distance between the second rolled edge 51 and the third rolled edge 61 is set along the axial direction of the ceramic capacitor 3.

[0067] A suitable spacing ensures a uniform electric field distribution, preventing electric field concentration due to insufficient distance and avoiding compromised shielding effectiveness due to excessive distance. During operation, the stable electric field distribution guarantees the normal operation of the ceramic capacitor 3.

[0068] This application optimizes the electric field distribution, improves the electrical performance and stability of the double-shielded ceramic capacitor structure, and reduces faults caused by electric field problems.

[0069] like Figure 1 and Figure 2 As shown, in one embodiment, the portion of the low-voltage parallel conductor 4 located between two adjacent ceramic capacitors 3 has an arched structure.

[0070] In the embodiment, the low-voltage parallel conductive wire 4 of the arched structure can effectively homogenize the electric field, so that the current is more evenly distributed among the plurality of ceramic capacitors 3. In operation, the current is more evenly distributed among the plurality of ceramic capacitors 3 through the conductive wire of the arched portion.

[0071] The application homogenizes the electric field distribution, improves the working efficiency and stability of the ceramic capacitors 3, and ensures the accuracy of measurement or energy extraction.

[0072] As shown in the drawings, in an embodiment, the ceramic capacitor double-shielded structure further comprises a secondary signal output line 7 connected with the low-voltage parallel conductive wire 4 for outputting signals. Figure 1

[0073] In the embodiment, the secondary signal output line 7 is a wire for outputting signals generated after measurement or energy extraction. The signals obtained by the ceramic capacitors 3 through measurement or energy extraction are transmitted to the secondary signal output line 7 through the low-voltage parallel conductive wire 4, and then the secondary signal output line 7 transmits the signals to other devices for processing and analysis.

[0074] The application realizes signal transmission, so that the results of measurement or energy extraction of the ceramic capacitors 3 can be utilized by subsequent devices, thereby expanding the application range of the ceramic capacitor double-shielded structure.

[0075] In an embodiment, an insulating layer is arranged on the outer peripheral wall of the secondary signal output line 7. The insulating layer is a layer of material wrapped on the outer peripheral wall of the secondary signal output line 7 and plays an insulating role. For example, a wrapping layer made of common rubber, plastic or other materials is an insulating layer, which prevents the secondary signal output line 7 from leaking electricity.

[0076] The insulating layer prevents the secondary signal output line 7 from leaking electricity with the surrounding components, thereby ensuring the stability of signal transmission. In the process of signal transmission, the insulating layer isolates external interference and the risk of leakage. The application improves the safety and stability of signal transmission, and reduces signal distortion and device failure caused by leakage and interference.

[0077] The above embodiments are only exemplary embodiments of the application and are not intended to limit the application. The protection scope of the application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the application within the spirit and protection scope of the application, and such modifications or equivalent replacements shall also be considered to fall within the protection scope of the application.​

Claims

1. A ceramic capacitor dual shield structure, characterized by, include: The central shielding mesh has a tubular structure. A high-voltage parallel conductor is wrapped around the outer wall of the central shielding mesh and connected to the central shielding mesh. Multiple ceramic capacitors, the high-voltage side of which is connected to the high-voltage parallel conductor; A low-voltage parallel conductor is wound around the plurality of ceramic capacitors and connected to the low-voltage side of the plurality of ceramic capacitors respectively. A high-voltage shielding mesh is connected to the high-voltage side of each of the ceramic capacitors and simultaneously covers the high-voltage side of the ceramic capacitors. A low-voltage shielding mesh is connected to the low-voltage side of each of the ceramic capacitors and simultaneously covers the low-voltage side of the ceramic capacitors.

2. The ceramic capacitor dual shield structure of claim 1, wherein, The ceramic capacitors are divided into multiple groups, and each group of ceramic capacitors is circumferentially distributed along the center line of the central shielding mesh.

3. The ceramic capacitor dual shield structure of claim 2, wherein, The ceramic capacitors in two adjacent groups are staggered along the axial direction of the central shielding mesh.

4. The ceramic capacitor dual shield structure of claim 1, wherein, The upper and lower edges of the central shielding mesh are rolled inward to form the first rolled edge.

5. The ceramic capacitor dual shield structure of claim 1, wherein, One end of the high-voltage shielding mesh is connected to one end face of the ceramic capacitor, and the other end extends toward the outer peripheral surface of the ceramic capacitor and curls up at the end in a direction away from the low-voltage shielding mesh to form a second rolled edge.

6. The ceramic capacitor dual shield structure of claim 5, wherein, One end of the low-voltage shielding mesh is connected to the other end of the ceramic capacitor, and the other end extends toward the outer peripheral surface of the ceramic capacitor and curls up at the end in a direction away from the high-voltage shielding mesh to form a third rolled edge.

7. The ceramic capacitor dual shield structure of claim 6, wherein, The distance between the edge of the second rolled edge and the outer peripheral wall of the ceramic capacitor is greater than 1 mm, the distance between the edge of the third rolled edge and the outer peripheral wall of the ceramic capacitor is greater than 1 mm, and the distance between the second rolled edge and the third rolled edge is greater than 5 mm.

8. The ceramic capacitor dual shield structure of claim 1, wherein, The portion of the low-voltage parallel conductor located between two adjacent ceramic capacitors has an arched structure.

9. The ceramic capacitor dual shield structure of claim 1, wherein, The ceramic capacitor double-shielded structure also includes a secondary signal output line, which is connected to the low-voltage parallel wire for outputting signals.

10. The ceramic capacitor dual shield structure of claim 9, wherein, An insulating layer is provided on the outer peripheral wall of the secondary signal output line.

Images