CN203150401U

CN203150401U - A solid-state aluminum electrolytic capacitor with a long service life

Info

Publication number: CN203150401U
Application number: CN 201320138319
Authority: CN
Inventors: 刘智春
Original assignee: SHENZHEN KE SHUN DA ELECTRONICS CO Ltd
Current assignee: SHENZHEN KE SHUN DA ELECTRONICS CO Ltd
Priority date: 2013-03-25
Filing date: 2013-03-25
Publication date: 2013-08-21
Anticipated expiration: 2023-03-25

Abstract

The utility model discloses a solid-state aluminum electrolytic capacitor with a long service life. The aluminum electrolytic capacitor comprises an aluminum housing. A capacitor core is mounted in the aluminum housing. The capacitor core is formed by winding an anode electrode foil, a separating layer, and a cathode electrode foil. The separating layer separates the anode electrode foil from the cathode electrode foil. A rubber sealing member is disposed at the opening of the aluminum housing and seals the aluminum housing. The anode electrode foil is connected with a piece of anode electrode foil strip, while the cathode electrode foil is connected with a piece of cathode electrode foil strip. An anode pin is welded on the end of the anode electrode foil, while a cathode pin is welded on the end of the cathode electrode foil. The anode pin and the cathode pin pass through the rubber sealing member and are bent inversely to be connected with the end of the piece of anode electrode foil strip and the end of the piece of cathode electrode foil strip, respectively. The aluminum electrolytic capacitor disclosed by the utility model reduces equivalent resistance between the electrode pins and the electrode foil strip, increases the contact area of the electrode pins and the electrode foil strip, and prolongs the service life of a product.

Description

Long-life solid aluminum electrolytic capacitor

Technical field

The utility model relates to aluminium electrolytic capacitor, belongs to the electric component field.

Background technology

At present, this area electrolytic capacitor commonly used mainly faces two problems: one is to use the back because the high-temperature oxydation of electrode pin causes the contact resistance increase between electrode pin and the electrode foil to cause capacitor effective capacitance amount seriously to descend long-time, and capacitive function lost efficacy; Another problem is that electric capacity is directly punctured when bigger reverse current occurring.

Summary of the invention

At the defective of prior art, the utility model discloses a kind of solid aluminum electrolytic capacitor, by the useful life that improvement has improved product, prevent from losing efficacy.

In improvement project of the present utility model, by the improvement to insulation layer structure, improved the breakdown characteristics of capacitor when running into reverse current.

For achieving the above object, the utility model is achieved through the following technical solutions:

Long-life solid aluminum electrolytic capacitor comprises aluminum hull, and capacitor core is installed in the aluminum hull, and capacitor core is reeled by anode electrode paper tinsel, separator, cathode electrode foil and constituted, and separator is kept apart anode electrode paper tinsel, cathode electrode foil; The opening part of aluminum hull has the rubber sealing aluminum hull is sealed, be connected with anode electrode chaff, cathode electrode chaff on anode electrode paper tinsel, the cathode electrode foil respectively, anode electrode chaff, cathode electrode chaff end welding respectively have anode pin, negative electrode pin, and anode pin, negative electrode pin pass the rubber sealing and oppositely bend and be connected to anode electrode chaff, cathode electrode chaff end.

Pass through said structure, because the two ends of electrode pin all are connected with corresponding electrode chaff, thereby increased the contact area of pin and the steatolysis of electrode chaff, reduced contact resistance, even increase the situation that catalytic oxidation between the two occurs along with service time, owing to have littler contact resistance, capacitor also can keep its normal working performance.

Further, described separator is three-decker, is made of PET dielectric film, conducting film, alumina insulating film, and conducting film is between PET dielectric film and alumina insulating film.

Owing between separator, be provided with independent conductive layer, when running into reverse current, metal ion athletic meeting on the conductive layer replaces the electrolyte conduction, thereby reduced the impact of the reverse current that acts on electric capacity core body electrolyte itself, thereby the breakdown problem of capacitor can not occur, guarantee the useful life of product.

By above-mentioned overall improvement, capacitor of the present utility model has good useful life.

Description of drawings

Fig. 1 is the stereogram of aluminium electrolytic capacitor of the present utility model;

Fig. 2 is the used capacitor core structure of aluminium electrolytic capacitor of the present utility model expanded view;

Fig. 3 is the insulation layer structure schematic diagram in the utility model aluminium electrolytic capacitor capacitor core.

Embodiment

With reference to figure 1,2, aluminium electrolytic capacitor of the present utility model, comprise aluminum hull 1, capacitor core is installed in the aluminum hull, capacitor core is by anode electrode paper tinsel 21, separator 22, cathode electrode foil 23 is reeled and is constituted, the opening part of aluminum hull has rubber sealing 3 aluminum hull is sealed, anode electrode paper tinsel 21, be connected with anode electrode chaff 412 on the cathode electrode foil 23 respectively, cathode electrode chaff 422, the anode electrode chaff, cathode electrode chaff end welding respectively has anode pin 41, negative electrode pin 42, wherein the anode pin 41, negative electrode pin 42 is the counter-rotating bending structure, and namely the anode pin 41, the two ends of negative electrode pin 42 all with corresponding anode electrode chaff 412,422 weldings of cathode electrode chaff.

With reference to figure 3, shown the profile of used separator, be respectively PET insulation 221 and alumina insulating film 222 in the both sides of conductive layer 220.

Claims

1. long-life solid aluminum electrolytic capacitor is characterized in that comprising aluminum hull, and capacitor core is installed in the aluminum hull, and capacitor core is reeled by anode electrode paper tinsel, separator, cathode electrode foil and constituted, and separator is kept apart anode electrode paper tinsel, cathode electrode foil; The opening part of aluminum hull has the rubber sealing aluminum hull is sealed, be connected with anode electrode chaff, cathode electrode chaff on anode electrode paper tinsel, the cathode electrode foil respectively, anode electrode chaff, cathode electrode chaff end welding respectively have anode pin, negative electrode pin, and anode pin, negative electrode pin pass the rubber sealing and oppositely bend and be connected to anode electrode chaff, cathode electrode chaff end.

2. solid aluminum electric capacity electrolyzer according to claim 1 is characterized in that described separator is three-decker, is made of PET dielectric film, conducting film, alumina insulating film, and conducting film is between PET dielectric film and alumina insulating film.