CN203150400U

CN203150400U - A solid-state aluminum electrolytic capacitor with low series induction

Info

Publication number: CN203150400U
Application number: CN 201320137289
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 low series induction. The solid-state aluminum electrolytic capacitor comprises an aluminum housing. A capacitor element is mounted in the aluminum housing and 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. The aluminum housing is enclosed by a polytetrafluoroethylene rubber sealing gasket covering the opening of the aluminum housing. The anode electrode foil is connected with an anode pin passing through the polytetrafluoroethylene rubber sealing gasket, while the cathode electrode foil is connected with a cathode pin passing through polytetrafluoroethylene rubber sealing gasket. The anode pin and the cathode pin are both wrapped in polytetrafluoroethylene films. The distance between the anode pin and the cathode pin is from 3 to 7 mm. The aluminum electrolytic capacitor effectively decreases the distance between the pins, reduces the area of a loop, and decreases the series inductance induction of the capacitor.

Description

The solid aluminum electrolytic capacitor of low series inductance

Technical field

The utility model relates to a kind of electrolytic capacitor, belongs to the electric component field.

Background technology

The use of capacitor is for convenience installed, positive and negative electrode binding post post generally can exceed blank cover plane 5-7mm, cause the positive and negative electrode conductor binding post post of the about 5-of terminal cover plate outside existence～7mm length surface bare metal thus, so there is high positive and negative electrode short-circuit risks in capacitor; And produce creepage phenomenon in order to prevent between the positive and negative electrode terminal, usually need be at the anti-creepage safe distance of setting according to operating voltage between the positive and negative electrode binding post post about 10mm, therefore cause the space, loop to strengthen, increased equivalent series inductance (ESL) value of capacitor.

Summary of the invention

At the defective of prior art, the utility model discloses a kind of solid aluminum electrolytic capacitor, by reducing the loop area between anode pin, negative electrode pin, improve its insulation characterisitic, thereby effectively reduce the series inductance value.

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

The solid aluminum electrolytic capacitor of low series inductance comprises aluminum hull, and capacity cell is installed in the aluminum hull, and capacity cell 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 is sealed aluminum hull by the polytetrafluoroethylene rubber gasket, be connected with the anode pin, the negative electrode pin that pass the polytetrafluoroethylene rubber gasket on anode electrode paper tinsel, the cathode electrode foil, wherein anode pin and negative electrode pin wrap up by poly tetrafluoroethylene, and the spacing between anode pin and the negative electrode pin is 3-7mm.

By above-mentioned improvement, owing to used the insulating material identical with diaphragm seal to carry out integral coating to pin, and effectively reduce the spacing between the pin, make that surrounding the space between the pin reduces, and has reduced equivalent series inductance (ESL) value; Simultaneously, because pin is insulated the material parcel, reduced short risk.

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

Under this kind structure, 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; Owing to adopt this kind structure, suppress the reverse leakage electric current simultaneously, also further reduced equivalent series inductance.

By above-mentioned improvement, capacitor of the present utility model has reduced the equivalent series induction of capacitor to greatest extent.

Description of drawings

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

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

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

Embodiment

With reference to figure 1,2, aluminium electrolytic capacitor of the present utility model, comprise aluminum hull 1, capacity cell is installed in the aluminum hull, capacity cell 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 polytetrafluoroethylene rubber gasket 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 polytetrafluoroethylene rubber membrane 410,420 wrap up anode pin 41, the spacing of negative electrode pin 42 is 4mm.

With reference to figure 3, shown the profile of used separator, at conductive layer 220 between alumina insulating film 221,222.

Claims

Low series inductance the solid aluminum electrolytic capacitor, it is characterized in that comprising aluminum hull, capacity cell is installed in the aluminum hull, and capacity cell is reeled by anode electrode paper tinsel, separator, cathode electrode foil and is constituted, and separator is kept apart anode electrode paper tinsel, cathode electrode foil; The opening part of aluminum hull is sealed aluminum hull by the polytetrafluoroethylene rubber gasket, be connected with the anode pin, the negative electrode pin that pass the polytetrafluoroethylene rubber gasket on anode electrode paper tinsel, the cathode electrode foil, wherein anode pin and negative electrode pin wrap up by poly tetrafluoroethylene, and the spacing between anode pin and the negative electrode pin is 3-7mm.
2. solid aluminum electrolytic capacitor according to claim 1 is characterized in that described separator is three-decker, is made of alumina insulating film, conducting film, alumina insulating film, and conducting film is between two-layer alumina insulating film.