CN202076142U

CN202076142U - Electrolytic capacitor

Info

Publication number: CN202076142U
Application number: CN2011201377863U
Authority: CN
Inventors: 戴悦庆
Original assignee: ZHOUSHAN XINLONG ELECTRONICS CO Ltd
Current assignee: ZHOUSHAN XINLONG ELECTRONICS CO Ltd
Priority date: 2011-05-04
Filing date: 2011-05-04
Publication date: 2011-12-14
Anticipated expiration: 2021-05-04

Abstract

The utility model relates to an electrolytic capacity, which comprises an aluminum casing (4) and a capacitor core (2). An insulation film (3) is arranged on the wall inside the aluminum casing. The gap distance between the capacitor core and the wall inside the aluminum casing is below 0.5 mm. Compared with the prior art, dimensions of the electrolytic capacitor can be minimized based on the fact that the original functions and performance of the electrolytic capacitor are kept, thereby resolving a problem that larger volume of the electrolytic capacitor limits development of miniaturization of electronic products.

Description

Electrolytic capacitor

Technical field

The utility model relates to a kind of electrolytic capacitor, belongs to capacitor technology field in the electricity.

Background technology

Electrolytic capacitor generally is to be made of aluminum hull body, capacitor core and Jiao Gai.Wherein capacitor core is to be overlapped for 4 layers by anode metal paper tinsel, electrolytic paper, cathodic metal paper tinsel, electrolytic paper etc. to reel, and handles forming again through impregnation electrolyte.Might be not high because carried out capacitor core that impregnation electrolyte handles because of installation accuracy, produce the crooked aluminum hull inwall of running into, make aluminum hull cause the capacitor core phenomenon that is short-circuited.So the electrolytic capacitor of prior art is around when assembling capacitor core and the space length of 1 ~ 3 millimeter need be arranged according to withstand voltage situation between the inwall of aluminum hull.Size along with various electronic systems (product), comprise dwindling day by day of thickness, other electronic components can satisfy the requirement of this trend substantially, this also requires electrolytic capacitor not lose on the basis of previous level in its performance, with the further miniaturization of overall dimension, therefore the spacing distance between above-mentioned electrolytic capacitor capacitor core and the aluminum hull is the important restraining factors of littleizationr of capacitor development.

Summary of the invention

At above-mentioned deficiency, the utility model is exactly to provide a kind of capacitance volume ratio bigger electrolytic capacitor.

Electrolytic capacitor of the present utility model has aluminum hull, capacitor core, on the said aluminum hull inwall dielectric film is arranged, and the spacing distance between capacitor core and the aluminum hull inwall is below 0.5mm.

Electrolytic capacitor of the present utility model, at the aluminum hull inwall dielectric film is arranged, and around the capacitor core and the spacing distance between the aluminum hull inwall below 0.5mm, because even dielectric film makes the aluminum hull inwall contact with capacitor core and also can not make its negative and positive the two poles of the earth short circuit, guaranteed that capacitor core can dwindle and the aluminum hull inwall between spacing distance, even can completely adorn.Because the capacitor core that is increased is its periphery, therefore the electrode area proportion that is increased is just higher, and the capacitance volume ratio is increased obviously.Experiment shows, if the aluminum hull external diameter is constant and under same requirement of withstand voltage, capacitor core can expand to and make capacitance promote 40% in the electrolytic capacitor.Therefore, compared with prior art the utility model can have been untied the restriction of the bigger volume of existing electrolytic capacitor to the development of littleizationr of electronic product keeping function and performance not to lose the overall dimensions of dwindling electrolytic capacitor on the basis of previous level.

Electrolytic capacitor of the present utility model, the dielectric film on the said aluminum hull internal face is a coating.

Electrolytic capacitor of the present utility model, said dielectric film through adhesive bonds on the aluminum hull internal face.

Electrolytic capacitor of the present utility model, said dielectric film are the erosion resisting insulation films, to avoid aluminum hull body and electrolyte generation chemical reaction, improve useful life.

Electrolytic capacitor of the present utility model, the spacing distance between said capacitor core and the aluminum hull inwall is below 0.2mm.

Description of drawings

Fig. 1 is an embodiment of the utility model electrolytic capacitor, among the figure: 1-Jiao Gai, 2-capacitor core, 3-dielectric film, 4-aluminum hull, 5-dielectric film.

Embodiment

1, an electrolytic capacitor, aluminum hull 4 flaps have Jiao Gai, capacitor core 2 is contained in the aluminum hull and is fixed on glue through electrode pin and covers, be coated with one deck dielectric film 3 in the aluminum hull, aluminum hull also is coated with one deck dielectric film 5 outward, distance between capacitor core periphery and the aluminum hull inwall is 0.3mm, coating thickness 6 μ m on the inwall.

2, an electrolytic capacitor is coated with one deck erosion resisting insulation film in the aluminum hull, capacitor core is contained in the aluminum hull and adorns with the glue cap seal, and the distance between capacitor core periphery and the aluminum hull inwall is 0.2mm, coating thickness 8 μ m on the inwall.

3, an electrolytic capacitor, aluminum hull are coated with one deck erosion resisting insulation film, and capacitor core is contained in the aluminum hull and adorns with the glue cap seal, and the distance between capacitor core periphery and the aluminum hull inwall is 0.1mm, coating thickness 12 μ m on the inwall, and aluminum hull is with one deck dielectric film outward.

Claims

1. an electrolytic capacitor has aluminum hull, capacitor core, and it is characterized in that has dielectric film on the said aluminum hull inwall, and the spacing distance between capacitor core and the aluminum hull inwall is below 0.5mm.

2. electrolytic capacitor as claimed in claim 1 is characterized in that the dielectric film on the said aluminum hull internal face is a coating.

3. electrolytic capacitor as claimed in claim 1, it is characterized in that said dielectric film through adhesive bonds on the aluminum hull internal face.

4. as claim 1 or 2 or 3 described electrolytic capacitors, it is characterized in that said dielectric film is the erosion resisting insulation film.

5. as claim 1 or 2 or 3 described electrolytic capacitors, it is characterized in that spacing distance between said capacitor core and the aluminum hull inwall is below 0.2mm.