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Ethylene glycol mixture, Al-electrolyte capacitor comprising ethylene glycol mixture and use of ethylene glycol mixture

A technology of ethylene glycol and mixtures, which is applied in the direction of electrolytic capacitors, capacitors, capacitor parts, etc., can solve the problems of increased fire hazards and easy fires, and achieve the effects of reducing fire hazards, weak chemical corrosion, and convenient processing

Inactive Publication Date: 2003-05-28
EPCOS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this dielectric is its tendency to catch fire, which significantly increases the risk of fire in the event of capacitor breakdown due to overvoltage
Furthermore, for this dielectric, special expensive materials have to be used for the closing disk due to the chemically aggressive solvents

Method used

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  • Ethylene glycol mixture, Al-electrolyte capacitor comprising ethylene glycol mixture and use of ethylene glycol mixture
  • Ethylene glycol mixture, Al-electrolyte capacitor comprising ethylene glycol mixture and use of ethylene glycol mixture

Examples

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Embodiment Construction

[0038] The drawing shows an aluminum dielectric capacitor in which a laminated body 1 consisting of an anode layer and a cathode layer with a separator layer in between in the form of a paper layer is formed in a roll. The paper layer is impregnated with the glycol mixture of the invention constituting the dielectric.

[0039] The roll is enclosed in a multipart housing 2 containing a cup 4 closed by a closure 3 . The cup 4 can be, for example, an aluminum cup. The closure 3 is preferably in the form of a phenolic resin disc and prevents the dielectric from escaping from the cup 4 . The housing 2 is also sealed from the outside world by a seal 5 consisting of a rubber ring, thereby preventing the dielectric from drying out.

[0040] The anode and cathode layers are electrically conductively connected to outwardly protruding terminal elements 6 via corresponding leads in the closure element 3 .

[0041] The invention is not restricted to the embodiments shown by way of examp...

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PUM

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Abstract

The invention relates to an ethylene glycol mixture which is provided with diethylene glycol monobutyl ether and B2O3, in addition to ethylene glycol and sorbite. The ethylene glycol mixture is thus provided with high electric strength (up to 600 V), a low water content and self-extinguishing characteristics for the use as electrolyte in an Al electrolyte capacitor. The invention also relates to an Al electrolyte capacitor comprising the ethylene glycol mixture and to the use of the ethylene glycol mixture in Al electrolyte capacitors for voltages up to 600 V.

Description

technical field [0001] The present invention relates to ethylene glycol mixtures containing ethylene glycol and sorbitol. The present invention also relates to aluminum dielectric capacitors with ethylene glycol mixture as dielectric. In addition, the present invention also relates to the use of glycol mixtures. Background technique [0002] Glycol mixtures of the type mentioned at the outset are well known and contain ammonium pentaborate (NH 4 B 5 o 8 ×4H 2 O). Ammonium pentaborate forms ions in ethylene glycol, so that known ethylene glycol mixtures can be used as dielectrics in aluminum dielectric capacitors. The structure of the aluminum dielectric capacitor includes a cathode film, which can be, for example, a thin aluminum foil with a textured surface and a thickness of 20 μm-50 μm, and an anode film, which is, for example, about 100 μm in thickness and which can be a textured aluminum foil It also has a dielectric oxide layer that is electrochemically coated d...

Claims

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Application Information

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IPC IPC(8): H01G9/032H01G9/02H01G9/022
CPCH01G9/022
Inventor T·埃贝尔W·劳尔
Owner EPCOS AG
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