CN211879249U

CN211879249U - Explosion-proof electrolytic capacitor

Info

Publication number: CN211879249U
Application number: CN202020261404.7U
Authority: CN
Inventors: 王永松; 王先琴
Original assignee: Suzhou Songcon Electronic Technology Co ltd
Current assignee: Suzhou Songcon Electronic Technology Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-11-06
Anticipated expiration: 2030-03-05

Abstract

The utility model discloses an explosion-proof electrolytic capacitor, including shell body and the interior casing of setting in the shell body, be equipped with a core package in the interior casing, the core package draws foil strip and negative pole to draw foil strip to communicate with each other with positive binding post and negative binding post respectively through the positive pole, positive and negative binding post accessible butt fusion terminal is fixed on the apron of setting on the shell body, be equipped with on the apron with positive and negative binding post matched with joining in marriage the hole, be equipped with explosion-proof groove on the outer circumference of interior casing, be equipped with an energy-absorbing board on each explosion-proof groove, another terminal surface of energy-absorbing board is hugged closely with the inner wall of shell. The beneficial effects of the utility model are mainly embodied in that: the energy-absorbing plate provides the holding power to explosion-proof groove, forms secondary explosion-proof structure on the condenser, and when condenser internal pressure was too big, explosion-proof groove was at first burst, and the energy-absorbing plate can fully absorb the produced energy of explosion, forms dual explosion-proof structure with explosion-proof groove cooperation, further reduces condenser explosion risk.

Description

Explosion-proof electrolytic capacitor

Technical Field

The utility model relates to an electrolytic capacitor particularly, especially, relate to an explosion-proof type electrolytic capacitor.

Background

Electrolytic capacitor reachs life, trouble or impressed voltage when too big, produce great electric current, make the inside temperature of electrolytic capacitor rise, and then arouse that the inside electrolyte of electrolytic capacitor evaporates or take place chemical reaction and produce gas, impel the increase of electrolytic capacitor internal pressure, intensity when its pressure exceedes the shell then can arouse the explosion, for avoiding explosion initiation accident, can set up explosion-proof groove or set up pressure relief structure such as explosion-proof valve on the roof of condenser usually, this roof is explosion-proof face promptly.

Therefore, when the electrolytic capacitor is abnormal, if the internal pressure intensity of the electrolytic capacitor is increased, the explosion-proof valve is promoted to be opened, high-pressure gas is sprayed out from the explosion-proof valve, or the explosion-proof surface is cracked to achieve the purpose of pressure relief, so that the explosion caused by the overlarge internal pressure intensity of the electrolytic capacitor is avoided.

However, in the process of pressure relief by cracking the explosion-proof surface or opening the explosion-proof valve, the high-pressure gas carries the electrolyte to be sprayed out together, and the electrolyte is attached to the circuit board and other electronic elements to cause faults such as electric leakage, short circuit and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide an explosion-proof electrolytic capacitor.

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

the utility model provides an explosion-proof electrolytic capacitor, includes the shell body and sets up interior casing in the shell body, be equipped with a core package in the interior casing, the core package is led the foil strip through positive pole and negative pole and is led the foil strip and communicate with each other with positive binding post and negative binding post respectively, positive and negative binding post accessible butt fusion terminal is fixed and is set up on the apron on the shell body, be equipped with on the apron with positive and negative binding post matched with joining in marriage the hole, be equipped with explosion-proof groove, each on the outer circumference of interior casing be equipped with an energy-absorbing board on the explosion-proof groove, another terminal surface of energy-absorbing board with the inner wall of shell body is hugged closely.

Preferably, be equipped with first stickness cushion between interior casing and the apron, the up end of first stickness cushion with interior casing connection, its lower terminal surface with the apron is connected.

Preferably, a second sticky rubber mat is arranged between the outer shell and the cover plate, the upper end face of the second sticky rubber mat is connected with the outer shell, and the lower end face of the second sticky rubber mat is connected with the cover plate.

Preferably, the energy absorption plate is in a shape of a Chinese character 'mi'.

Preferably, the inner shell is provided with two explosion-proof grooves which are symmetrically arranged.

Preferably, the middle part of the inner 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.

The beneficial effects of the utility model are mainly embodied in that:

1. compared with the prior art, the explosion-proof groove is arranged on the inner shell, the structural strength of the position of the explosion-proof groove is weaker, and when the pressure inside the capacitor is too high, the explosion-proof groove is firstly burst, so that directional pressure relief is realized, and the capacitor is prevented from exploding.

2. The energy-absorbing plate provides the holding power to explosion-proof groove, forms secondary explosion-proof structure on the condenser, and when condenser internal pressure was too big, explosion-proof groove was at first burst, and the energy-absorbing plate can fully absorb the produced energy of explosion, forms dual explosion-proof structure with explosion-proof groove cooperation, further reduces condenser explosion risk.

3. The sealing performance that the stickness cushion further strengthened has improved electrolytic capacitor's sealed effect, reduces the weeping risk of electrolyte.

4. The middle part of the inner shell is additionally provided with a binding groove, so that the core cladding is fixed in the radial direction, and the anti-seismic performance of the capacitor is improved.

Drawings

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

FIG. 1: the structure of the utility model is shown schematically;

FIG. 2: a cross-sectional view a-a in fig. 1;

FIG. 3: a partial enlarged view of portion B in fig. 1.

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 to 3, the utility model discloses an explosion-proof electrolytic capacitor, be in including shell body 1 and setting interior casing 2 in the shell body 1, be equipped with a core package 3 in the interior casing 2, core package 3 draws foil strip and negative pole to draw the foil strip to communicate with each other with anodal binding post and negative pole binding post respectively through the positive pole, positive negative pole binding post accessible butt fusion terminal is fixed to be set up on the apron 4 on the shell body 1, be equipped with on the apron 4 with positive negative pole binding post matched with joining in marriage the hole, join in marriage the hole and be used for making anodal binding post negative pole binding post through this hole and with the positive pole draw the foil strip the negative pole draws the foil strip to connect.

The outer circumference of the inner housing 2 is provided with two explosion-proof grooves 21, and in this embodiment, it is preferable that the inner housing 2 is provided with two symmetrically-arranged explosion-proof grooves 21. Of course, other numbers of anti-explosion grooves 21 can be adopted, which all belong to the protection scope of the present invention, and are not described herein. In the above, each explosion-proof groove 21 is provided with an energy-absorbing plate 22 in a shape like a Chinese character 'mi', another end face of the energy-absorbing plate 22 is tightly attached to the inner wall of the outer shell 1, and the energy-absorbing plate 22 is tightly matched with the explosion-proof groove 21 and the outer shell 1. For clarity of disclosure, the distance between the outer housing 1 and the inner housing 2 is enlarged, and in practice, the distance between the outer housing 1 and the inner housing 2 is small. Further, an energy absorbing hole 23 is further formed in the energy absorbing plate 22. Compared with the prior art, the structure has the advantages that the explosion-proof groove is formed in the inner shell, the structural strength of the position of the explosion-proof groove is weak, and when the pressure inside the capacitor is too high, the explosion-proof groove is firstly burst, directional pressure relief is realized, and the capacitor is prevented from exploding. In addition, the energy absorption plate can provide supporting force for the explosion-proof groove, a secondary explosion-proof structure is formed on the capacitor, when the pressure inside the capacitor is too high, the explosion-proof groove is firstly burst, the energy absorption plate can fully absorb energy generated by explosion, and the energy absorption plate is matched with the explosion-proof groove to form a double explosion-proof structure, so that the explosion risk of the capacitor is further reduced.

The utility model discloses in, be equipped with first stickness cushion 5 between interior casing 2 and the apron 4, the up end of first stickness cushion 5 with interior casing 2 is connected, its lower terminal surface with apron 4 is connected. A second viscous rubber pad 6 is arranged between the outer shell 1 and the cover plate 4, the upper end face of the second viscous rubber pad 6 is connected with the outer shell 1, and the lower end face of the second viscous rubber pad is connected with the cover plate 4. The sealing performance that first stickness cushion 5 and second stickness cushion 6 set up and can further strengthen has improved electrolytic capacitor's sealed effect, reduces the weeping risk of electrolyte.

The middle part of the inner shell 2 is provided with a circle of binding groove 7, the binding groove 7 is of an inwards concave arc structure, and the top point of the arc surface of the binding groove 7 is always abutted to and kept in contact with the core package 3. The bound groove 7 fixes the core bag from the radial direction, and the shock resistance of the capacitor is improved.

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. Explosion-proof formula electrolytic capacitor is in including shell body (1) and setting interior casing (2) in shell body (1), be equipped with a core package (3) in interior casing (2), core package (3) are drawn foil strip and negative pole through the positive pole and are drawn the foil strip and communicate with each other with positive binding post and negative binding post respectively, positive negative binding post accessible butt fusion terminal is fixed and is set up on apron (4) on shell body (1), be equipped with on apron (4) with positive negative binding post matched with joining in marriage hole, its characterized in that: be equipped with explosion-proof groove (21) on the outer circumference of interior casing (2), each be equipped with a thin wall energy-absorbing board (22) on explosion-proof groove (21), another terminal surface of energy-absorbing board (22) with the inner wall of shell body (1) is hugged closely, just be equipped with energy-absorbing hole (23) on energy-absorbing board (22).

2. The explosion-proof electrolytic capacitor as recited in claim 1, wherein: be equipped with first stickness cushion (5) between interior casing (2) and apron (4), the up end of first stickness cushion (5) with interior casing (2) are connected, its lower terminal surface with apron (4) are connected.

3. The explosion-proof electrolytic capacitor as recited in claim 1, wherein: be equipped with second stickness cushion (6) between shell body (1) and apron (4), the up end of second stickness cushion (6) with shell body (1) is connected, its lower terminal surface with apron (4) are connected.

4. The explosion-proof electrolytic capacitor as recited in claim 1, wherein: the energy absorption plate (22) is in a shape of a Chinese character 'mi'.

5. The explosion-proof electrolytic capacitor as recited in claim 1, wherein: the inner shell (2) is provided with two explosion-proof grooves (21) which are symmetrically arranged.

6. The explosion-proof electrolytic capacitor as recited in claim 1, wherein: the middle part of the inner shell (2) is provided with a circle of binding groove (7), the binding groove (7) is of an inwards concave arc-shaped structure, and the top point of the arc surface of the binding groove (7) is always abutted to and kept in contact with the core bag (3).