Center-through capacitor

Abstract

The utility model relates to the field of capacitors, and discloses a feed-through capacitor, which comprises a shell, a core tube and a core bag, the core tube and the core bag are arranged in the shell, the core bag is sleeved on the core tube, and the core bag is electrically connected with two groups of electrode contacts with opposite polarities; in the axial direction of the core tube, the two ends of the core bag are sealed in the shell through insulating filler; the two ends of the core tube extend out of the insulating filler and are respectively sleeved with a group of electrode joints, and the electrode joints are partially sealed in the insulating filler; in the feed-through capacitor, heat generated by the core cladding can be dissipated through the channel in the core tube; heat transmitted to the two ends of the core tube and heat generated by the contact point of the electrode contact and the core package can be transmitted to the outside of the capacitor in a heat conduction mode, heat dissipation is carried out through the end portion, exposed in the air, of the core tube and the electrode contact, the contact area with the air is increased, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of capacitors, in particular to a through-type capacitor. Background Art

[0002] A through-type capacitor refers to a capacitor whose core rod in the middle of the core package is a tubular structure (i.e., core tube). Compared with traditional solid capacitors, the core tube structure in the middle of the through-type capacitor can better dissipate the heat accumulated in the middle of the core package and improve the heat dissipation performance of the capacitor.

[0003] The utility model patent with authorization announcement number CN207731814U discloses a small through-core aluminum electrolytic capacitor with good heat dissipation performance. However, in the patent scheme, the two ends of the hollow tube (i.e., the core tube) are flush with the cover plate sealed on the core package. Therefore, the hollow tube does not fully extend from the two ends of the core package. That is, when the hollow tube dissipates the heat generated by the core package, it completely relies on the channel inside the hollow tube for heat dissipation, which is not conducive to improving the heat dissipation efficiency. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the background technology and provide a through-type capacitor.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A through-type capacitor comprises a shell, a core tube and a core package arranged in the shell, wherein the core package is sleeved on the core tube, and the core package is electrically connected to two groups of electrode connectors with opposite polarities; in the axial direction of the core tube, two ends of the core package are sealed in the shell by insulating fillers;

[0007] Both ends of the core tube extend to the outside of the insulating filler, and a group of electrode connectors are respectively sleeved on both ends of the core tube, and the electrode connectors are partially sealed in the insulating filler.

[0008] Furthermore, the core package is a film capacitor wound on the core tube.

[0009] Furthermore, the electrode connector includes a tubular portion sleeved on the core tube, the outer wall of the first end of the tubular portion is provided with a plurality of first connecting plates electrically connected to the core package, the plurality of first connecting plates and part of the tubular portion are sealed in the insulating filler; the outer wall of the second end of the tubular portion is provided with a plurality of second connecting plates located outside the insulating filler.

[0010] Furthermore, the second connecting sheet is provided with a through hole for passing a wire.

[0011] Furthermore, the first connecting piece is connected to the core package by welding.

[0012] Furthermore, in any cross section perpendicular to the axial direction of the core tube, the inner cross-sectional profile of the core tube is in the shape of a triangle, a quadrilateral, a pentagon, a hexagon or a circle.

[0013] Furthermore, the shell is an injection-molded plastic shell.

[0014] Furthermore, the shell is composed of Mylar tape wound around the outer wall of the core package.

[0015] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0016] In the through-type capacitor of the utility model, both ends of the core tube extend to the outside of the insulating filler, and a set of electrode joints are respectively provided at both ends of the core tube, and the electrode joints are partially sealed in the insulating filler; therefore, the capacitor has the following advantages when dissipating heat:

[0017] 1. The heat generated by the core package is dissipated through the channels inside the core tube.

[0018] 2. The heat generated by the core package can be transferred to both ends through the core tube. Since both ends of the core tube are exposed to the outside, heat exchange can be carried out with the air to improve the heat dissipation performance.

[0019] 3. Since the electrode joints are sleeved on both ends of the core tube and partially exposed to the air, the heat transferred from the core tube to the two ends and the heat generated by the contact points between the electrode joints and the core package can be transferred to the outside of the capacitor by heat conduction. The heat is dissipated through the core tube ends and electrode joints exposed to the air, thereby increasing the contact area with the air and improving the heat dissipation efficiency.

[0020] 4. When necessary, cooling gas or liquid can be introduced into the core tube, and a temperature sensor can be placed therein to facilitate monitoring of the capacitor status. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the through-type capacitor of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the through-type capacitor of the utility model after removing the shell;

[0023] Figure 3 It is a schematic diagram of the connection relationship between the core tube and the electrode joint in the through-type capacitor of the utility model;

[0024] Icon: 1-shell, 2-core package, 3-core tube, 4-electrode connector, 40-tubular portion, 41-first connecting piece, 42-second connecting piece, 420-through hole, 5-insulating filler. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Reference Figures 1 to 3 The utility model discloses a through-type capacitor, comprising a shell 1 and a core tube 3 and a core package 2 arranged in the shell 1.

[0027] The shell 1 may be an injection-molded plastic shell, or may be composed of a Mylar tape wrapped around the outer wall of the core package 2 .

[0028] Reference Figure 2 The core package 2 is sleeved on the core tube 3, and a group of electrode connectors 4 are electrically connected to each of the two ends of the core package 2, that is, one group of electrode connectors 4 is connected to the positive electrode of the core package 2 and the other group of electrode connectors 4 is connected to the negative electrode of the core package 2. Specifically, the electrode connectors 4 are welded to the two ends of the core package 2.

[0029] The core package 2 may be a core package structure inside a ceramic capacitor or an electrolytic capacitor. In this embodiment, the core package 2 is a thin film capacitor structure wound on the core tube 3 .

[0030] Reference Figure 1 In the axial direction of the core tube 3, both ends of the core package 2 are sealed in the shell 1 through insulating fillers 5. The insulating fillers 5 are made of epoxy resin, vermiculite or microcrystalline wax, etc. In this embodiment, epoxy resin is used.

[0031] Reference Figure 1 Both ends of the core tube 3 extend to the outside of the insulating filler 5 , and a group of electrode connectors 4 are respectively sleeved at both ends of the core tube 3 , and the electrode connectors 4 are partially sealed in the insulating filler 5 .

[0032] Specifically, refer to Figure 2 and Figure 3 The electrode connector 4 includes a tubular portion 40 sleeved on the core tube 3, the inner diameter of the tubular portion 40 matches the outer diameter of the core tube 3, and at any cross section perpendicular to the axial direction of the core tube 3, the inner cross-sectional profile of the core tube 3 can be a triangle, a quadrilateral, a pentagon, a hexagon or a circle.

[0033] In addition, the outer side wall of the first end of the tubular portion 40 is provided with a plurality of first connecting pieces 41 electrically connected to the core package 2, as shown in FIG. Figure 3In this embodiment, four groups of first connecting pieces 41 are provided on the outer side wall of the first end of the tubular portion 40. The first connecting pieces 41 are welded to the core package 2, and the four groups of first connecting pieces 41 and part of the tubular portion 40 are sealed in the insulating filler 5. In addition, a plurality of second connecting pieces 42 located outside the insulating filler 5 are provided on the outer side wall of the second end of the tubular portion 40. In this embodiment, two groups of second connecting pieces 42 are provided, and each of the two groups of second connecting pieces 42 is provided with a through hole 420 for passing a wire so as to be connected to an external circuit.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A through-type capacitor, comprising a housing (1), a core tube (3) and a core package (2) arranged in the housing (1), wherein: The core package (2) is sleeved on the core tube (3), and the core package (2) is electrically connected to two sets of electrode connectors (4) with opposite polarities; in the axial direction of the core tube (3), the two ends of the core package (2) are sealed in the shell (1) by insulating fillers (5), characterized in that: Both ends of the core tube (3) extend to the outside of the insulating filler (5), and a group of electrode connectors (4) are respectively sleeved on both ends of the core tube (3), and the electrode connectors (4) are partially sealed in the insulating filler (5).

2. The through-type capacitor according to claim 1, characterized in that: The core package (2) is a thin film capacitor wound on the core tube (3).

3. The through-type capacitor according to claim 1 or 2, characterized in that: The electrode connector (4) comprises a tubular portion (40) sleeved on the core tube (3); a first end outer wall of the tubular portion (40) is provided with a plurality of first connecting pieces (41) electrically connected to the core package (2); the plurality of first connecting pieces (41) and a portion of the tubular portion (40) are sealed in the insulating filler (5); and a second end outer wall of the tubular portion (40) is provided with a plurality of second connecting pieces (42) located outside the insulating filler (5).

4. The through-type capacitor according to claim 3, characterized in that: The second connecting piece (42) is provided with a through hole (420) for passing a wire.

5. The through-type capacitor according to claim 3, characterized in that: The first connecting piece (41) is connected to the core package (2) by welding.

6. The through-hole capacitor according to claim 1, characterized in that: On any cross section perpendicular to the axial direction of the core tube (3), the inner cross-sectional profile of the core tube (3) is in the shape of a triangle, a quadrilateral, a pentagon, a hexagon or a circle.

7. The feedthrough capacitor according to claim 1, characterized in that: The housing (1) is an injection-molded plastic shell.

8. The feedthrough capacitor according to claim 1, characterized in that: The shell (1) is composed of a Mylar tape wound around the outer wall of the core package (2).

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