CN213660216U

CN213660216U - High-sealing electrolytic capacitor

Info

Publication number: CN213660216U
Application number: CN202022677236.2U
Authority: CN
Inventors: 王永松
Original assignee: Suzhou Songcon Electronic Technology Co ltd
Current assignee: Suzhou Songcon Electronic Technology Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-07-09
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a high-tightness electrolytic capacitor with heat dissipation function, which comprises a shell and a cover plate arranged on the shell, wherein a core cladding is arranged in the shell and is respectively communicated with an anode connecting terminal and a cathode connecting terminal arranged on the cover plate through an anode foil leading strip and a cathode foil leading strip; the outer circumference of the cover plate is provided with an extension part which is integrally formed with the cover plate, and the inner wall of the extension part is clung to the outer circumferential surface of the shell; a set of gaps are formed in the shell, the shell and the cover plate are integrally covered with a heat dissipation layer in a vacuum film covering mode, and the heat dissipation layer at least blocks the gaps and seals the extension portion. The beneficial effects of the utility model are mainly embodied in that: the structure is exquisite, and sealed structure between casing and the apron can be strengthened to this structure, makes electrolytic capacitor have stronger sealing performance, has improved electrolytic capacitor's sealed effect, reduces electrolyte's weeping risk.

Description

High-sealing electrolytic capacitor

Technical Field

The utility model relates to the technical field of capacitors, particularly, especially, relate to a high leakproofness electrolytic capacitor.

Background

Electrolytic capacitors used in our lives are irreplaceable basic elements in various electronic products, and are widely applied to the fields of electric automobiles, industrial energy-saving products, photovoltaic inverters and the like. In the recent years, the rapid development of electronic component integration and high-speed processing technology makes the global market put higher demands on the performance of the capacitor products. The development trend of electrolytic capacitors is long service life, high temperature resistance and high-frequency ripple current resistance.

The aluminum electrolytic capacitor comprises an aluminum shell, an element and a pin, wherein the element is packaged in a cavity of the aluminum shell, and the pin is connected with the element and led to the outside. The element comprises a positive aluminum foil, a negative aluminum foil and electrolytic paper positioned between the positive aluminum foil and the negative aluminum foil, and the conventional electrolytic paper is generally thin and single-layer. Because the positive electrode guide connecting piece is connected with the positive electrode aluminum foil through cold welding, electrochemical reaction can occur at the connecting part and generate a large amount of heat during electrifying, the heat is difficult to be quickly dissipated, the temperatures of different parts of the product are inconsistent, the stability of the product can be influenced, and the service life of the product is further shortened. Therefore, there is a need to improve the above-mentioned disadvantages.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide an electrolytic capacitor with high sealing property.

The purpose of the utility model is realized through the following technical scheme:

a high-sealing electrolytic capacitor with a heat dissipation function comprises a shell and a cover plate arranged on the shell, wherein a core cladding is arranged in the shell and is respectively communicated with a positive connecting terminal and a negative connecting terminal arranged on the cover plate through a positive foil leading strip and a negative foil leading strip; the outer circumference of the cover plate is provided with an extension part which is integrally formed with the cover plate, and the inner wall of the extension part is clung to the outer circumferential surface of the shell; a set of gaps are formed in the shell, the shell and the cover plate are integrally covered with a heat dissipation layer in a vacuum film covering mode, and the heat dissipation layer at least blocks the gaps and seals the extension portions.

Preferably, the heat dissipation layer is a heat conduction silica gel layer.

Preferably, a sticky rubber mat is arranged between the shell and the lower surface of the cover plate, the upper end face of the sticky rubber mat is tightly attached to the lower surface of the cover plate, and the lower end face of the sticky rubber mat is tightly attached to the upper surface of the shell.

Preferably, a heat-conducting silica gel block is arranged between the core bag and the shell and is tightly attached to the core bag and the shell.

Preferably, the middle part of the shell is provided with a circle of binding groove, the binding groove is of an inwards concave arc structure, and the top point of the arc surface of the binding groove is always abutted against and kept in contact with the core bag.

Preferably, the inner surface of the bottom of the shell is provided with an explosion-proof groove.

The beneficial effects of the utility model are mainly embodied in that: the structure is exquisite, and sealed structure between casing and the apron can be strengthened to this structure, makes electrolytic capacitor have stronger sealing performance, has improved electrolytic capacitor's sealed effect, reduces electrolyte's weeping risk. The bonding strength between the heat-conducting silica gel layer and the shell is relatively weak, and when the internal pressure of the electrolytic capacitor is too high, the cover plate and the heat-conducting silica gel layer are firstly propped open, so that the directional pressure relief is realized, and the explosion of the capacitor is prevented.

Drawings

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

FIG. 1: the utility model discloses preferred embodiment's cross-sectional view.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the utility model discloses a high leakproofness electrolytic capacitor with heat dissipation function, be in including casing 1 and setting apron 2 on the casing 1, be equipped with a core package 3 in the casing 1, core package 3 draws the foil strip through anodal and negative pole and draws the foil strip respectively with the setting and be in anodal binding post 21 and negative pole binding post 22 on the apron 2 communicate with each other. Above-mentioned structure is prior art, consequently, the utility model discloses do not do too much repetitious description here.

An extension part 23 which is integrally formed with the cover plate 2 is arranged on the outer circumference of the cover plate, and the inner wall of the extension part 23 is clung to the outer circumferential surface of the shell 1. Furthermore, a sticky rubber mat is arranged between the shell 1 and the lower surface of the cover plate 2, the upper end surface of the sticky rubber mat is tightly attached to the lower surface of the cover plate 2, and the lower end surface of the sticky rubber mat is tightly attached to the upper surface of the shell 1. In addition, a set of gaps 11 is formed in the shell 1, the shell 1 and the cover plate 2 are integrally covered with a heat dissipation layer 12 in a vacuum film covering mode, the heat dissipation layer 12 at least blocks the gaps 11 and seals the extension portions 23, and preferably, the heat dissipation layer 12 is a heat conduction silica gel layer. Above-mentioned structure is exquisite, and this structure can strengthen the sealed structure between casing and the apron, makes electrolytic capacitor have stronger sealing performance, has improved electrolytic capacitor's sealed effect, reduces electrolyte's weeping risk. The bonding strength between the heat-conducting silica gel layer and the shell is relatively weak, and when the internal pressure of the electrolytic capacitor is too high, the cover plate and the heat-conducting silica gel layer are firstly propped open, so that the directional pressure relief is realized, and the explosion of the capacitor is prevented.

The heat conduction silica gel block 31 is arranged between the core cladding 3 and the shell 1 and clings to the core cladding, and the heat conduction silica gel block 31 can transfer heat at the core cladding to the shell 1 so as to realize rapid heat dissipation.

In the preferred embodiment, a circle of binding groove 5 is arranged in the middle of the shell 1, the binding groove 5 is of an inward concave arc structure, and the top of the arc surface of the binding groove 5 is always abutted against and kept in contact with the core bag 2. And a binding groove is additionally arranged in the middle of the shell to fix the core cladding in the radial direction, so that the anti-seismic performance of the capacitor is improved. In addition, the inner surface of the bottom of the shell 1 can be provided with an explosion-proof groove.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The electrolytic capacitor with the heat dissipation function and the high sealing property comprises a shell (1) and a cover plate (2) arranged on the shell (1), wherein a core cladding (3) is arranged in the shell (1), and the core cladding (3) is respectively communicated with a positive connecting terminal (21) and a negative connecting terminal (22) which are arranged on the cover plate (2) through a positive foil leading strip and a negative foil leading strip; the method is characterized in that: an extension part (23) which is integrally formed with the cover plate (2) is arranged on the outer circumference of the cover plate, and the inner wall of the extension part (23) is clung to the outer circumferential surface of the shell (1); a set of gaps (11) are formed in the shell (1), the shell (1) and the cover plate (2) are integrally covered with a heat dissipation layer (12) in a vacuum film covering mode, and the heat dissipation layer (12) at least blocks the gaps (11) and the extension portions (23).

2. The high-sealability electrolytic capacitor with a heat-dissipating function of claim 1, wherein: the heat dissipation layer (12) is a heat conduction silica gel layer.

3. The high-sealability electrolytic capacitor with a heat-dissipating function of claim 1, wherein: the improved cover plate is characterized in that a sticky rubber pad is arranged between the shell (1) and the lower surface of the cover plate (2), the upper end face of the sticky rubber pad is tightly attached to the lower surface of the cover plate (2), and the lower end face of the sticky rubber pad is tightly attached to the upper surface of the shell (1).

4. The high-sealability electrolytic capacitor with a heat-dissipating function of claim 3, wherein: and a heat-conducting silica gel block (31) which is tightly attached to the core bag (3) and the shell (1) is arranged between the core bag and the shell.

5. The high-sealability electrolytic capacitor with a heat-dissipating function of claim 3, wherein: the middle part of the shell (1) is provided with a circle of binding groove (5), the binding groove (5) is of an inwards concave arc-shaped structure, and the top point of the arc surface of the binding groove (5) is always abutted to and kept in contact with the core bag (3).

6. The high-sealability electrolytic capacitor with a heat-dissipating function of claim 5, wherein: the bottom inner surface of the shell (1) is provided with an explosion-proof groove.