CN212516934U

CN212516934U - Aluminum electrolytic capacitor

Info

Publication number: CN212516934U
Application number: CN202021273539.1U
Authority: CN
Inventors: 陈宇澄; 杜学军; 潘素清
Original assignee: WUXI WANYU ELECTRONICS CO Ltd
Current assignee: WUXI WANYU ELECTRONICS CO Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-09
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses an aluminum electrolytic capacitor, including aluminum hull, micelle stopper and core, the aluminum hull is upper end open-ended tube-shape, and the internal surface of upper end is protruding to form the snap ring, and the end is along being provided with the interior turn-ups that detains, and the micelle stopper is spacing by the snap ring chucking and by the interior turn-ups that detains to form inside appearance chamber, the core is located inside appearance chamber, has drawn forth the guide pin of wearing out the micelle stopper on the core, is provided with the liner insulated paper on the inner wall of the lower extreme of aluminum hull, and the liner insulated paper is wrapped up the tip of core and is extended to its side. The aluminum electrolytic capacitor increases the insulating capacity between the core and the aluminum shell by arranging the liner insulating paper, so that the width of the positive aluminum foil and the negative aluminum foil can be increased as much as possible, the edge allowance between the electrolytic paper and the aluminum foil is reduced, the condition that the product is implosive due to sparking between the positive foil and the aluminum shell is avoided, and the development requirements of miniaturization and flattening of the aluminum electrolytic capacitor are met.

Description

Aluminum electrolytic capacitor

Technical Field

The utility model relates to an electronic components technical field especially relates to an aluminum electrolytic capacitor.

Background

The capacitance of the aluminum electrolytic capacitor is determined by the capacity (specific volume) per unit area of the positive and negative aluminum foils used and the effective areas of the positive and negative aluminum foils. In order to meet the development requirements of miniaturization and flattening of electrical equipment, the volume of the capacitor must be smaller, on one hand, the specific volume of the positive aluminum foil and the negative aluminum foil selected by the capacitor must be increased, and on the other hand, the effective area of the positive aluminum foil and the negative aluminum foil must be increased to reduce the volume of the capacitor. In order to increase the effective area of the positive and negative aluminum foils, the width of the positive and negative aluminum foils is generally increased to reduce the margin between the electrolytic paper and the aluminum foil, but the reduction of the margin between the electrolytic paper and the aluminum foil reduces the distance between the positive foil and the aluminum shell, and the voltage resistance is insufficient, so that the problem that the product is easy to implode due to the ignition between the positive foil and the aluminum shell occurs. In addition, as the capacitor is miniaturized under high voltage and the applied environment is more and more severe, the sealing performance of the product is easily damaged, various performances of the product are reduced, and the service life of the product is shortened. Therefore, a solution is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an aluminum electrolytic capacitor, solve and lead to the structure unstable, take place product implosion scheduling problem owing to reduce the product volume.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides an aluminum electrolytic capacitor, it includes the aluminum hull, micelle stopper and core, the aluminum hull is upper end open-ended tube-shape, and the protruding snap ring that forms of internal surface of upper end, the end is along being provided with the interior turn-ups that detains, the micelle stopper is spacing by the snap ring chucking and by the interior turn-ups that detains to form inside appearance chamber, the core is located inside appearance chamber, the guide pin of wearing out the micelle stopper has been drawn forth on the core, be provided with the liner insulated paper on the inner wall of the lower extreme of aluminum hull, the liner insulated paper is with the tip parcel of core and extend to its.

Further, the core comprises an anode aluminum foil, a cathode aluminum foil and electrolytic paper, the two aluminum foils are separated by the electrolytic paper and wound together into a cylinder shape, the upper edge of the electrolytic paper exceeds the upper edges of the anode aluminum foil and the cathode aluminum foil by 0.5mm, and the lower edge of the electrolytic paper exceeds the lower edges of the anode aluminum foil and the cathode aluminum foil by 0.5 mm.

Further, the liner insulation paper extends to 1/4 on the side of the core.

Furthermore, the core, the liner insulating paper and the aluminum shell are sequentially bonded by the adhesive.

To sum up, the beneficial effects of the utility model are that, compare with prior art, aluminum electrolytic capacitor increases the insulating ability between core and the aluminum hull through setting up the liner insulated paper to can the width of the positive negative aluminium foil of increase as far as possible, reduce and leave the limit volume between electrolytic paper and the aluminium foil, and avoid appearing striking sparks between positive paper tinsel and the aluminum hull and cause the condition of product implosion, satisfied aluminum electrolytic capacitor miniaturization, the development needs of platyzing.

Drawings

Fig. 1 is a schematic structural diagram of an aluminum electrolytic capacitor provided in an embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Referring to fig. 1, the present embodiment provides an aluminum electrolytic capacitor, which includes an aluminum case 1, a rubber plug 2 and a core 3.

The aluminum shell 1 is in the shape of a cylinder with an opening at the upper end, a clamping ring 4 is formed on the inner surface of the upper end in a protruding mode, an inner buckling flanging 5 is arranged on the end edge, the colloidal particle plug 2 is clamped by the clamping ring 4 and limited by the inner buckling flanging 5, an inner accommodating cavity is formed, the core 3 is located in the inner accommodating cavity, and a guide pin 6 penetrating out of the colloidal particle plug 2 is led out of the core 3.

The inner wall of the lower end of the aluminum shell 1 is provided with a liner insulating paper 7, the liner insulating paper 7 wraps the end of the core 3 and extends to the side of the core 3, and preferably, the liner insulating paper 7 extends to 1/4 on the side of the core 3.

The core 3, the liner insulating paper 7 and the aluminum shell 1 are sequentially bonded by the adhesive.

The core 3 comprises an anode aluminum foil, a cathode aluminum foil and electrolytic paper, the two aluminum foils are separated by the electrolytic paper and are wound into a cylinder together, the upper edge of the electrolytic paper exceeds the upper edges of the anode aluminum foil and the cathode aluminum foil by 0.5mm, and the lower edge of the electrolytic paper exceeds the lower edges of the anode aluminum foil and the cathode aluminum foil by 0.5 mm. Due to the existence of the liner insulating paper 7, the width of the positive and negative aluminum foils can be increased as much as possible, and the specific volume of the positive and negative aluminum foils is improved.

In conclusion, the aluminum electrolytic capacitor increases the insulating capacity between the core and the aluminum shell by arranging the liner insulating paper, so that the widths of the positive aluminum foil and the negative aluminum foil can be increased as much as possible, the edge allowance between the electrolytic paper and the aluminum foil is reduced, the situation that the product is imploded due to sparking between the positive foil and the aluminum shell is avoided, and the development requirements of miniaturization and flattening of the aluminum electrolytic capacitor are met.

The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an aluminum electrolytic capacitor, its characterized in that, includes aluminum hull, micelle stopper and core, the aluminum hull is upper end open-ended tube-shape, and the protruding snap ring that forms of internal surface of upper end, end along being provided with the interior turn-ups that detains, the micelle stopper by the snap ring chucking and by the interior turn-ups that detains is spacing to form inside appearance chamber, the core is located inside holds in the chamber, draw forth the guide pin of wearing out the micelle stopper on the core, be provided with the liner insulated paper on the inner wall of the lower extreme of aluminum hull, the liner insulated paper wraps up the tip of core and extends to its side.

2. The aluminum electrolytic capacitor of claim 1, wherein: the core comprises an anode aluminum foil, a cathode aluminum foil and electrolytic paper, the two aluminum foils are separated by the electrolytic paper and wound into a cylinder together, the upper edge of the electrolytic paper exceeds the upper edges of the anode aluminum foil and the cathode aluminum foil by 0.5mm, and the lower edge of the electrolytic paper exceeds the lower edges of the anode aluminum foil and the cathode aluminum foil by 0.5 mm.

3. The aluminum electrolytic capacitor of claim 1, wherein: the liner insulation extends to 1/4 on the side of the core.

4. The aluminum electrolytic capacitor of claim 1, wherein: the core, the liner insulating paper and the aluminum shell are sequentially bonded through the adhesive.