CN214672239U

CN214672239U - Aluminum shell for capacitor and capacitor

Info

Publication number: CN214672239U
Application number: CN202120316402.8U
Authority: CN
Inventors: 何霄云; 徐永华; 景俊峰; 魏金京; 宋国华
Original assignee: NANTONG JIANGHAI CAPACITOR CO Ltd
Current assignee: NANTONG JIANGHAI CAPACITOR CO Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-11-09
Anticipated expiration: 2031-02-03

Abstract

The utility model provides an aluminum shell for a capacitor and the capacitor, wherein the aluminum shell for the capacitor comprises a cylinder body, a bottom plate connected to the bottom of the cylinder body and an insulating layer arranged above the bottom plate; wherein, the bottom plate is provided with an explosion-proof rib; and a discharge hole is formed in the insulating layer. The utility model provides an aluminum shell for capacitor, through set up the insulating layer above the bottom plate, even the edge remaining amount of the electrolytic paper in the shrink body product is very little, the aluminium foil can not contact with the aluminum shell directly, thus has stopped the short circuit risk; simultaneously, through set up the bleed hole on the insulating layer for the high temperature high-pressure gas that produces in the aluminum hull can pass the bleed hole after, releases from explosion-proof muscle department smoothly, thereby further improves the security performance of aluminum hull for the condenser, and then improves the security of condenser.

Description

Aluminum shell for capacitor and capacitor

Technical Field

The utility model relates to a condenser technical field particularly, relates to an aluminum hull and condenser for condenser.

Background

Capacitors are an important component used in large numbers in electronic devices. With the development of science and technology, various electronic devices are developed to be miniaturized and flattened, and accordingly, the current capacitor is more and more reduced; along with the reduction of the volume of the capacitor, the edge allowance of the electrolytic paper in the core package of the capacitor is smaller and smaller, so that the distance between the aluminum foil in the capacitor and the bottom of the shell of the capacitor is closer and closer, and the risk of short circuit breakdown in the working process of the super-capacitor is higher.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem take place the risk that the short circuit punctures great in the super body condenser working process at present.

In order to solve the above problems, the present invention provides an aluminum case for a capacitor, comprising a cylinder, a bottom plate connected to the bottom of the cylinder, and an insulating layer disposed above the bottom plate; wherein,

the bottom plate is provided with an explosion-proof rib;

and a discharge hole is formed in the insulating layer.

Optionally, the insulating layer is made of electrolytic paper.

Optionally, a glue layer is coated on the bottom surface of the insulating layer, and the insulating layer is bonded to the bottom plate through the glue layer.

Optionally, the adhesive layer is an acrylic adhesive layer.

Optionally, the thickness of the insulating layer ranges from 45 μm to 70 μm.

Optionally, the bleed aperture has a diameter in the range 2mm to 4 mm.

Optionally, the center of the bleed hole coincides with the center of the explosion-proof rib.

Optionally, the explosion-proof rib is a Y-shaped explosion-proof rib.

Another object of the present invention is to provide a capacitor, which includes the aluminum case for capacitor as described above.

Compared with the prior art, the utility model provides an aluminum hull for condenser has following advantage:

the utility model provides an aluminum shell for capacitor, through set up the insulating layer above the bottom plate, even the edge remaining amount of the electrolytic paper in the shrink body product is very little, the aluminium foil can not contact with the aluminum shell directly, thus has stopped the short circuit risk; simultaneously, through set up the bleed hole on the insulating layer for the high temperature high-pressure gas that produces in the aluminum hull can pass the bleed hole after, releases from explosion-proof muscle department smoothly, thereby further improves the security performance of aluminum hull for the condenser, and then improves the security of condenser.

Drawings

FIG. 1 is a schematic view of an aluminum case for a capacitor according to the present invention;

FIG. 2 is a schematic view of the structure of the middle bottom plate of the present invention;

FIG. 3 is a schematic view of the structure of the middle insulating layer of the present invention;

fig. 4 is a side view of the middle insulation layer of the present invention.

Description of reference numerals:

1-a cylinder body; 2-a bottom plate; 21-explosion-proof rib; 3-an insulating layer; 31-bleed orifice.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for the purpose of simplifying the description, and do not indicate or imply that the device or element 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" and "second" are used merely to simplify the description 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" or "second" 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 specifically limited otherwise.

In the present disclosure, unless otherwise expressly stated or limited, a first feature "on" or "under" a first feature may comprise the first feature and a second feature in direct contact, or may comprise the first feature and the second feature not in direct contact but in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Generally, a capacitor comprises a cylindrical aluminum shell with an open top, wherein a core package is arranged in the aluminum shell and is directly placed on a bottom plate of the aluminum shell; a cover plate for sealing is arranged at the top of the aluminum shell; at present, along with the reduction of the volume of the capacitor, the edge margin of electrolytic paper in a core package is smaller and smaller, the distance between an aluminum foil and a bottom plate of the capacitor is smaller and smaller, the winding deviation of the core package is considered, the probability of contact between a positive foil and the bottom plate of an aluminum shell is increased, and therefore the risk of short circuit breakdown in the working process of the capacitor is increased.

In order to solve the problem that the short circuit breakdown risk is large in the working process of the current super-shrinkage capacitor, the utility model provides an aluminum shell for a capacitor, which is shown in figure 1 and comprises a cylinder body 1, a bottom plate 2 connected to the bottom of the cylinder body 1 and an insulating layer 3 arranged above the bottom plate 2; wherein, the bottom plate 2 is provided with an explosion-proof rib 21; the insulating layer 3 is provided with a bleed hole 31.

Specifically, the cylinder 1 in the present application is preferably a cylindrical structure, the bottom plate 2 is preferably a circular plate-shaped structure, both the cylinder 1 and the bottom plate 2 are formed by punching an aluminum plate with a certain thickness, a cylindrical aluminum shell with a certain diameter and a certain thickness is formed by the cylinder 1 and the bottom plate 2, and the core package is placed in the aluminum shell; the specific dimensions of the cylinder 1 and the bottom plate 2 are determined according to the size of the capacitor.

Because high-temperature and high-pressure gas can be generated in the working process of the capacitor, if the working time of the capacitor is too long, the high-temperature and high-pressure gas cannot be discharged in time, the capacitor is easy to explode, and great potential safety hazards are caused; in order to improve the safety, referring to fig. 2, the base plate 2 in the present application is provided with an anti-explosion rib 21, and the anti-explosion rib 21 may be a groove-shaped structure; along with the increase of the working time of the capacitor, the high-temperature and high-pressure gas in the aluminum shell is more and more, and the pressure is higher and higher; when the pressure reaches a certain value, the explosion-proof rib 21 on the bottom plate 2 is propped open to release high-temperature and high-pressure gas in the aluminum shell, so that explosion is prevented, and the safety of the capacitor is improved.

Simultaneously, for the risk that takes place the short circuit breakdown in reducing the condenser working process, this application sets up an insulating layer 3 in bottom plate 2 top for core package 2 is placed on this insulating layer 3, avoids core package and bottom plate 2 direct contact, thereby stops the short circuit risk, improves the security performance.

The shape and size of the insulating layer 3 are matched with those of the bottom plate 2, and particularly, the diameter of the insulating layer 3 is preferably slightly smaller than the inner diameter of the cylinder 1.

Further, in order to guarantee that the capacitor can be smoothly released when explosion-proof release, the high-temperature high-pressure gas in the aluminum shell is released, as shown in fig. 3 and fig. 4, the release hole 31 is formed in the insulating layer 3, so that when explosion-proof release is performed, the high-temperature high-pressure gas generated in the aluminum shell is discharged to the outside of the capacitor from the explosion-proof rib 21 after passing through the release hole 31, and the safety of the aluminum shell for the capacitor is further improved.

Through set up bleed hole 31 on insulating layer 3, can avoid when taking place explosion-proof release, high-pressure gas breaks insulating layer 31 the back for the piece that insulating layer 31 produced is followed the bottom of condenser and is washed out, thereby when improving the security performance, can also guarantee the condenser after explosion-proof release, and the outward appearance satisfies the demand.

The utility model provides an aluminum shell for capacitor, through setting up insulating layer 3 above bottom plate 2, even the edge remaining amount of the electrolytic paper in the shrink body product is very little, the aluminium foil can not contact with the aluminum shell directly yet to stop the short circuit risk; meanwhile, the insulating layer 3 is provided with the discharge hole 31, so that high-temperature and high-pressure gas generated in the aluminum shell can smoothly discharge from the explosion-proof rib 21 after passing through the discharge hole 31, the safety performance of the aluminum shell for the capacitor is further improved, and the safety of the capacitor is further improved.

The material of the insulating layer 3 can be any insulating substance in the prior art; in the application, the insulating layer 3 is preferably made of electrolytic paper, and the characteristic that the electrolytic paper does not influence the performance of the electrolyte is utilized to avoid the influence of the arrangement of the insulating layer 3 on the electrical performance of the capacitor; meanwhile, the characteristics of high cost performance and easily available materials of the electrolytic paper are utilized, insulation between the core cladding and the aluminum shell is ensured, and meanwhile, the cost is not obviously increased.

For the stability of further improvement aluminium shell structure for the condenser, the bottom surface of insulating layer 3 scribbles the glue film in this application, and insulating layer 3 bonds with bottom plate 2 mutually through this glue film.

Specifically, the bottom surface of the insulating layer 3 in this application refers to a surface of the insulating layer 3 that contacts the bottom plate 2; when insulating layer 3 chose for use the electrolytic paper, scribble the glue film through the bottom surface at the electrolytic paper for the electrolytic paper becomes the structure similar to adhesive tape paper, thereby has improved the cohesion between insulating layer 3 and the bottom plate 2 on the one hand, avoids changing in the relative position between insulating layer 3 and the bottom plate 2 in the assembling process, and on the other hand is favorable to reducing the equipment degree of difficulty of aluminum hull, improves the packaging efficiency.

The adhesive layer coated on the bottom surface of the insulating layer 3 is preferably an acrylic adhesive layer.

The thickness of the insulating layer 3 may be determined according to the size of the capacitor, the use requirement, and the like, and the thickness of the insulating layer 3 is preferably in the range of 45 μm to 70 μm, and further preferably 50 μm.

The vent hole 31 on the insulating layer 3 can be in any geometric shape such as square, round, oval and the like; the bleed aperture 31 is preferably circular in shape; the diameter of the bleed hole 31 matches the diameter of the capacitor winding pin, and the diameter of the bleed hole 31 is preferably in the range of 2mm to 4mm, and the diameter of the bleed hole 31 is more preferably 2.5 mm.

For the security that further improves the condenser, the center of the preferred discharge hole 31 of this application coincides mutually with the center of explosion-proof muscle 21, promptly for the centre of a circle of discharge hole 31 is just to setting up with the explosion-proof center of explosion-proof muscle 21, and simultaneously, this explosion-proof center is also just to setting up with the center of condenser core package, thereby guarantees when explosion-proof release that high temperature high-pressure gas can release smoothly, guarantees the security.

The anti-explosion ribs 21 on the bottom plate 2 can be cross-shaped anti-explosion ribs, Y-shaped anti-explosion ribs and the like commonly used in the prior art; the preferred explosion-proof muscle 21 of this application is the explosion-proof muscle of Y type.

Specifically, this application provides a condenser, set up the core package in as above aluminium shell for the condenser, through set up insulating layer 3 on the bottom plate 2 at the aluminium shell, avoid core package and 2 direct contact of bottom plate to stop the short circuit risk.

The capacitor provided by the utility model has the advantages that the insulating layer 3 is arranged above the bottom plate 2, so that the aluminum foil can not be in direct contact with the aluminum shell even if the edge remaining amount of the electrolytic paper in the shrinkage product is very small, thereby avoiding the risk of short circuit; meanwhile, the insulating layer 3 is provided with the discharge hole 31, so that high-temperature and high-pressure gas generated in the aluminum shell can smoothly discharge from the explosion-proof rib 21 after passing through the discharge hole 31, the safety performance of the aluminum shell for the capacitor is further improved, and the safety of the capacitor is further improved.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims

1. The aluminum shell for the capacitor is characterized by comprising a cylinder body (1), a bottom plate (2) connected to the bottom of the cylinder body (1), and an insulating layer (3) arranged above the bottom plate (2); wherein,

the bottom plate (2) is provided with an explosion-proof rib (21);

and a discharge hole (31) is formed in the insulating layer (3).

2. The aluminum case for capacitors as claimed in claim 1, wherein the insulating layer (3) is made of electrolytic paper.

3. The aluminum can for capacitors as claimed in claim 2, wherein the bottom surface of the insulating layer (3) is coated with a glue layer, and the insulating layer (3) is bonded to the bottom plate (2) through the glue layer.

4. The aluminum case for capacitors as claimed in claim 3, wherein the adhesive layer is an acryl adhesive layer.

5. The aluminum case for capacitors as claimed in claim 3, wherein the thickness of the insulating layer (3) is in the range of 45 μm to 70 μm.

6. An aluminum case for capacitors as claimed in claim 3, wherein the diameter of the bleed hole (31) ranges from 2mm to 4 mm.

7. The aluminum case for capacitors as claimed in any one of claims 1 to 6, wherein the center of the bleed hole (31) coincides with the center of the explosion-proof rib (21).

8. The aluminum case for capacitors as claimed in claim 7, wherein the explosion proof rib (21) is a Y-shaped explosion proof rib.

9. A capacitor comprising the aluminum case for capacitors as claimed in any one of claims 1 to 8.