EP1269498A1 - Ethylene glycol mixture, al-electrolyte capacitor comprising the ethylene glycol mixture and the use of the ethylene glycol mixture - Google Patents

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

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Publication number
EP1269498A1
EP1269498A1 EP01929240A EP01929240A EP1269498A1 EP 1269498 A1 EP1269498 A1 EP 1269498A1 EP 01929240 A EP01929240 A EP 01929240A EP 01929240 A EP01929240 A EP 01929240A EP 1269498 A1 EP1269498 A1 EP 1269498A1
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EP
European Patent Office
Prior art keywords
ethylene glycol
weight
glycol mixture
electrolyte
mixture according
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP01929240A
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German (de)
French (fr)
Inventor
Thomas Ebel
Wilhelm Lauer
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TDK Electronics AG
Original Assignee
Epcos AG
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Filing date
Publication date
Application filed by Epcos AG filed Critical Epcos AG
Publication of EP1269498A1 publication Critical patent/EP1269498A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/022—Electrolytes; Absorbents

Definitions

  • the invention relates to an ethylene glycol mixture with ethylene glycol and sorbitol. Furthermore, the invention relates to an Al electrolyte capacitor with the ethylene glycol mixture as the electrolyte. In addition, the invention relates to the use of the ethylene glycol mixture.
  • Ethylene glycol mixtures of the type mentioned at the outset which contain ammonium pentaborate (NH B5O8 x 4 H2O).
  • the ammonium pentaborate forms ions in the ethylene glycol, so that the known ethylene glycol mixtures can be used as the electrolyte in Al electrolytic capacitors.
  • Aluminum electrolytic capacitors are constructed from a cathode foil, which can be, for example, a thin, roughened Al foil with a thickness between 20 and 50 ⁇ m, and an anode foil, which can be, for example, a roughly 100 ⁇ m thick, roughened Al foil and which has a dielectric oxide layer which is applied directly to the film by electrochemical processes.
  • the foils are usually designed as a winding wound on a winding mandrel.
  • the aim of the present invention is therefore to provide an ethylene glycol mixture which is suitable as an electrolyte for an Al electrolyte capacitor and which has low chemical aggressiveness, reduced flammability and a high dielectric strength against overvoltages.
  • the invention provides an ethylene glycol mixture with: a) 40-85 percent by weight ethylene glycol b) 1-25 percent by weight adipic acid c) 5-20 percent by weight sorbitol d) 0.5-1.5 weight percent phosphoric acid e) 0.5-2.0 weight percent NH3 f) 3-40 weight percent diethylene glycol monobutyl ether g) 5-18 weight percent B2O3.
  • the ethylene glycol mixture according to the invention can also contain small amounts of other conventional constituents which do not impair the desired properties of the mixture.
  • the ethylene glycol mixture according to the invention has the advantage that it has a high dielectric strength due to the proportion of diethylene glycol monobutyl ether. It is therefore very well suited for use as an electrolyte in an aluminum electrolytic capacitor, since breakdowns are not easily triggered in the event of overvoltages.
  • the ethylene glycol mixture according to the invention has the advantage that it has a lower water content.
  • the lower water content is mainly due to the fact that the ammonium pentaborate forms more water than an equivalent amount of B2O3 in the esterification reaction with the solvents.
  • the ethylene glycol mixture according to the invention has the advantage that it has low chemical aggressiveness.
  • the ethylene glycol mixture according to the invention is very well suited as an electrolyte for an Al electrolyte capacitor which is installed in a multi-component housing.
  • the housing can be protected against leakage of the electrolyte by sealing with a simple sealing element, which does not have to be particularly resistant to chemicals.
  • a phenolic resin disk which is covered with a rubber ring is sealed.
  • a phenolic resin disc is inexpensive to purchase and easy to process.
  • the ethylene glycol mixture according to the invention has the advantage that it has self-extinguishing properties. Therefore, when using the ethylene glycol mixture according to the invention as an electrolyte in aluminum electrolytic capacitors, the risk of fire in the event of arcing is significantly reduced.
  • an ethylene glycol mixture which is a) 50-60% by weight ethylene glycol b) 2-3% by weight adipic acid c) 10-15% by weight sorbitol d) 0.7-1.0% by weight phosphoric acid e) 1.2-2, 0% by weight NH3 f) 10-15% by weight diethylene glycol monobutyl ether g) 10-15% by weight B2O3.
  • the ethylene glycol mixture according to the invention can also contain small amounts of other conventional constituents which do not impair the desired properties of the mixture.
  • Such an ethylene glycol mixture has the advantage that it has a spark voltage of 560-600 volts at an operating temperature of 85 ° C. In addition, it has the advantage that it has a flash point of 125 ° C and thus a very low flammability.
  • the invention specifies an Al electrolyte capacitor in which the electrolyte is the ethylene glycol mixture according to the invention. It has a layer stack with an anode layer and a cathode layer, between which a separating layer impregnated with the electrolyte is arranged.
  • the layer stack is installed in a multi-component housing, which is closed by a closing element.
  • the Al electrolytic capacitor has the advantage that it is suitable for operating voltages between 500 and 600 volts. This suitability results essentially from the high dielectric strength of the ethylene glycol mixture according to the invention.
  • the aluminum electrolytic capacitor according to the invention has the advantage that a sealing element made of phenolic resin can be used particularly advantageously for sealing the housing; Phenolic resin is an inexpensive material that can also be processed particularly easily.
  • the invention specifies the use of the ethylene glycol mixture as an electrolyte in an Al electrolyte capacitor for voltages between 500 and 600 volts. Because of the high dielectric strength, the ethylene glycol mixture according to the invention has the advantage that it is suitable as an electrolyte for an aluminum electrolytic capacitor for voltages up to 600 volts.
  • the figure shows an Al electrolytic capacitor according to the invention in a schematic cross section.
  • the figure shows an Al electrolytic capacitor, in which a layer stack 1 is formed from anode and cathode layers and an intermediate separating layer in the form of a winding, which contains the separating layer in the form of a paper layer.
  • the paper layer is with the invention
  • the winding is installed in a multi-component housing 2, which comprises a cup 4, which is closed with a closing element 3.
  • the cup 4 can be an aluminum cup, for example.
  • the closure element 3 is preferably designed as a phenolic resin disk and prevents the electrolyte from leaking out of the cup 4.
  • the housing 2 is also sealed to the outside by a seal 5, consisting of a rubber ring, which prevents the electrolyte from drying out.
  • the anode and cathode layers are conductively connected to the outwardly projecting connection elements 6 by corresponding bushings in the end element 3.

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

Beschreibungdescription
Ethylenglykolmischung, AI -Elektrolyt -Kondensator mit der Ethylenglykolmischung und Verwendung der Ethylenglykolmi- schungEthylene glycol mixture, AI electrolytic capacitor with the ethylene glycol mixture and use of the ethylene glycol mixture
Die Erfindung betrifft eine Ethylenglykolmischung mit Ethy- lenglykol und Sorbit. Ferner betrifft die Erfindung einen Al- Elektrolyt -Kondensator mit der Ethylenglykolmischung als Elektrolyt. Darüber hinaus betrifft die Erfindung die Verwendung der Ethylenglykolmischung.The invention relates to an ethylene glycol mixture with ethylene glycol and sorbitol. Furthermore, the invention relates to an Al electrolyte capacitor with the ethylene glycol mixture as the electrolyte. In addition, the invention relates to the use of the ethylene glycol mixture.
Es sind Ethylenglykolmischungen der eingangs genannten Art bekannt, die Ammoniumpentaborat (NH B5O8 x 4 H2O) enthalten. Das Ammoniumpentaborat bildet im Ethylenglykol Ionen, so daß die bekannten Ethylenglykolmischungen als Elektrolyt in Al- Elektrolyt-Kondensatoren verwendet werden können. Aluminium- Elektrolyt -Kondensatoren sind aufgebaut aus einer Kathodenfolie, die beispielsweise eine dünne, aufgerauhte AI -Folie mit einer Dicke zwischen 20 und 50 μm sein kann, und einer Anodenfolie, die beispielsweise eine ca. 100 μm dicke, aufgerauhte Al-Folie sein kann und die eine dielektrisch wirksame Oxidschicht aufweist, die durch elektrochemische Verfahren direkt auf der Folie aufgebracht ist. Zwischen den Folien be- findet sich eine ein- oder mehrlagige Papierschicht, die mit dem Betriebselektrolyten imprägniert wird. Dieser Betriebselektrolyt stellt die eigentliche Kathode dar. Die Folien sind üblicherweise als auf einen Wickeldorn gewickelter Wickel ausgeführt .Ethylene glycol mixtures of the type mentioned at the outset are known which contain ammonium pentaborate (NH B5O8 x 4 H2O). The ammonium pentaborate forms ions in the ethylene glycol, so that the known ethylene glycol mixtures can be used as the electrolyte in Al electrolytic capacitors. Aluminum electrolytic capacitors are constructed from a cathode foil, which can be, for example, a thin, roughened Al foil with a thickness between 20 and 50 μm, and an anode foil, which can be, for example, a roughly 100 μm thick, roughened Al foil and which has a dielectric oxide layer which is applied directly to the film by electrochemical processes. There is a single or multi-layer paper layer between the foils, which is impregnated with the operating electrolyte. This operating electrolyte represents the actual cathode. The foils are usually designed as a winding wound on a winding mandrel.
Für die heute üblichen Kondensatoren in Wiekelausführung werden diese Komponenten nach dem Imprägnieren in einen Al- Becher eingebaut. Dieser wird mit einer Abschlußscheibe mit elektrischen Durchführungen zur Kontaktierung von Anode und Kathode abgeschlossen und zur Vermeidung von AbdampfVerlusten des Elektrolyten bei hoher Betriebstemperatur mit einer Dichtung abgeschlossen. Die bekannten Ethylenglykolmischungen haben den Nachteil, daß beim Auflösen des Ammoniumpentaborats in Ethylenglykol Wasser frei wird, das zwar einerseits die Leitfähigkeit des Betrieb- selektrolyten erhöht, was im Sinne eines niedrigen Wirkwiderstands des Kondensators wünschenswert ist, das aber auch andererseits die Funkenspannung herabsetzt, so daß Al- Elektrolyt-Kondensatoren mit solchen Elektrolyten bei Betriebsspannungen von > 500 V nicht sicher betrieben werden können. Zudem greift Wasser die Oxidschicht der Anode anAfter the impregnation, these components are installed in an aluminum cup for the commonly used cradle type capacitors. This is closed with a cover plate with electrical feedthroughs for contacting the anode and cathode and sealed to prevent evaporation losses of the electrolyte at high operating temperatures with a seal. The known ethylene glycol mixtures have the disadvantage that when the ammonium pentaborate is dissolved in ethylene glycol, water is released which, on the one hand, increases the conductivity of the operating electrolyte, which is desirable in the sense of a low resistance of the capacitor, but on the other hand also reduces the spark voltage, so that Al electrolytic capacitors with such electrolytes cannot be operated safely at operating voltages of> 500 V. In addition, water attacks the oxide layer of the anode
(Reststromproblem) und bildet an der Kathodenfolie H2~Gas, welches das Aluminium chemisch angreift. Des weiteren ist ein Elektrolyt für AI -Elektrolyt- Kondensatoren bekannt, der γ-Butyrolacton als Lösungsmittel enthält. Dieser Elektrolyt hat vor allem den Nachteil, daß er leicht entzündlich ist, was die Brandgefahr bei durch Überspannungen auftretenden Durchschlägen im Kondensator stark erhöht. Außerdem muß bei derartigen Elektrolyten auf Grund der chemischen Aggressivität des Lösungsmittels spezielles und teures Material für die Abschlußscheibe verwendet werden.(Residual current problem) and forms H2 ~ gas on the cathode foil, which attacks the aluminum chemically. Furthermore, an electrolyte for Al electrolytic capacitors is known which contains γ-butyrolactone as a solvent. The main disadvantage of this electrolyte is that it is highly flammable, which greatly increases the risk of fire in the event of overvoltages in the capacitor. In addition, because of the chemical aggressiveness of the solvent, special and expensive material must be used for the cover plate in such electrolytes.
Ziel der vorliegenden Erfindung ist es daher, eine Ethylenglykolmischung anzugeben, die als Elektrolyt für einen Al- Elektrolyt-Kondensator geeignet ist und die eine geringe che- mische Aggressivität, eine reduzierte Brennbarkeit und eine hohe Spannungsfestigkeit gegen Überspannungen aufweist.The aim of the present invention is therefore to provide an ethylene glycol mixture which is suitable as an electrolyte for an Al electrolyte capacitor and which has low chemical aggressiveness, reduced flammability and a high dielectric strength against overvoltages.
Dieses Ziel wird erfindungsgemäß durch eine Ethylenglykolmischung nach Anspruch 1 erreicht. Vorteilhafte Ausgestaltungen der Erfindung, ein Al-Elektrolyt-Kondensator mit der erfindungsgemäßen Ethylenglykolmischung und eine Verwendung der Erfindung sind den weiteren Ansprüchen zu entnehmen.This aim is achieved according to the invention by an ethylene glycol mixture according to claim 1. Advantageous embodiments of the invention, an Al electrolyte capacitor with the ethylene glycol mixture according to the invention and a use of the invention can be found in the further claims.
Die Erfindung gibt eine Ethylenglykolmischung an mit: a) 40-85 Gewichtsprozent Ethylenglykol b) 1-25 Gewichtsprozent Adipinsäure c) 5-20 Gewichtsprozent Sorbit d) 0,5-1,5 Gewichtsprozent Phosphorsäure e) 0,5-2,0 Gewichtsprozent NH3 f) 3-40 Gewichtsprozent Diethylenglykolmonobutylether g) 5-18 Gewichtsprozent B2O3.The invention provides an ethylene glycol mixture with: a) 40-85 percent by weight ethylene glycol b) 1-25 percent by weight adipic acid c) 5-20 percent by weight sorbitol d) 0.5-1.5 weight percent phosphoric acid e) 0.5-2.0 weight percent NH3 f) 3-40 weight percent diethylene glycol monobutyl ether g) 5-18 weight percent B2O3.
Neben diesen wesentlichen Bestandteilen kann die erfindungsgemäße Ethylenglykolmischung noch geringe Mengen weiterer üblicher Bestandteile enthalten, die die gewünschten Eigenschaften der Mischung nicht beeinträchtigen.In addition to these essential constituents, the ethylene glycol mixture according to the invention can also contain small amounts of other conventional constituents which do not impair the desired properties of the mixture.
Die erfindungsgemäße Ethylenglykolmischung hat den Vorteil, daß sie durch den Anteil an Diethylenglykolmonobutylether eine hohe Spannungsfestigkeit aufweist. Daher ist sie für den Einsatz als Elektrolyt in einem Al-Elektrolyt-Kondensator sehr gut geeignet, da bei Überspannungen nicht so leicht Durchschläge ausgelöst werden.The ethylene glycol mixture according to the invention has the advantage that it has a high dielectric strength due to the proportion of diethylene glycol monobutyl ether. It is therefore very well suited for use as an electrolyte in an aluminum electrolytic capacitor, since breakdowns are not easily triggered in the event of overvoltages.
Darüber hinaus hat die erfindungsgemäße Ethylenglykolmischung durch das Beifügen von B2O3 (das Anhydrid der Borsäure) an- stelle des bekannten Ammoniumpentaborats den Vorteil, daß sie einen geringeren Wassergehalt aufweist. Der geringere Wassergehalt rührt vor allem daher, daß das Ammoniumpentaborat bei der Veresterungsreaktion mit den Lösungsmitteln mehr Wasser bildet als eine äquivalente Menge B2O3.In addition, by adding B2O3 (the anhydride of boric acid) instead of the known ammonium pentaborate, the ethylene glycol mixture according to the invention has the advantage that it has a lower water content. The lower water content is mainly due to the fact that the ammonium pentaborate forms more water than an equivalent amount of B2O3 in the esterification reaction with the solvents.
Ferner hat die erfindungsgemäße Ethylenglykolmischung den Vorteil, daß sie eine geringe chemische Aggressivität aufweist. Dadurch ist die erfindungsgemäße Ethylenglykolmischung sehr gut als Elektrolyt für einen Al-Elektrolyt-Kondensator geeignet, der in ein mehrkomponentiges Gehäuse eingebaut ist. Das Gehäuse kann durch Abschließen mit einem einfachen Abschlußelement, das chemisch nicht besonders resistent sein muß, vor dem Auslaufen des Elektrolyten geschützt werden.Furthermore, the ethylene glycol mixture according to the invention has the advantage that it has low chemical aggressiveness. As a result, the ethylene glycol mixture according to the invention is very well suited as an electrolyte for an Al electrolyte capacitor which is installed in a multi-component housing. The housing can be protected against leakage of the electrolyte by sealing with a simple sealing element, which does not have to be particularly resistant to chemicals.
Bei einem üblicherweise für einen Al-Elektrolyt-Kondensator verwendeten becherförmigen Aluminiumgehäuse genügt beispielsweise als Abschlußelement eine Phenolharzscheibe, die mit ei- nem Gummiring abgedichtet wird. Eine solche Phenolharzscheibe ist billig in der Beschaffung und einfach in der Verarbeitung.In the case of a cup-shaped aluminum housing which is usually used for an aluminum electrolytic capacitor, a phenolic resin disk which is covered with a rubber ring is sealed. Such a phenolic resin disc is inexpensive to purchase and easy to process.
Darüber hinaus hat die erfindungsgemäße Ethylenglykolmischung den Vorteil, daß sie selbstverlöschende Eigenschaften aufweist. Daher wird beim Einsatz der erfindungsgemäßen Ethylenglykolmischung als Elektrolyt in Al-Elektrolyt- Kondensatoren die Brandgefahr im Falle von Funkenüberschlägen deutlich vermindert.In addition, the ethylene glycol mixture according to the invention has the advantage that it has self-extinguishing properties. Therefore, when using the ethylene glycol mixture according to the invention as an electrolyte in aluminum electrolytic capacitors, the risk of fire in the event of arcing is significantly reduced.
Es ist darüber hinaus eine Ethylenglykolmischung besonders vorteilhaft, die a) 50-60 Gewichtsprozent Ethylenglykol b) 2-3 Gewichtsprozent Adipinsäure c) 10-15 Gewichtsprozent Sorbit d) 0,7-1,0 Gewichtsprozent Phosphorsäure e) 1,2-2,0 Gewichtsprozent NH3 f) 10-15 Gewichtsprozent Diethylenglykolmonobutylether g) 10-15 Gewichtsprozent B2O3 aufweist.In addition, an ethylene glycol mixture which is a) 50-60% by weight ethylene glycol b) 2-3% by weight adipic acid c) 10-15% by weight sorbitol d) 0.7-1.0% by weight phosphoric acid e) 1.2-2, 0% by weight NH3 f) 10-15% by weight diethylene glycol monobutyl ether g) 10-15% by weight B2O3.
Neben diesen wesentlichen Bestandteilen kann die erfindungsgemäße Ethylenglykolmischung noch geringe Mengen weiterer üblicher Bestandteile enthalten, die die gewünschten Eigen- schaffen der Mischung nicht beeinträchtigen.In addition to these essential constituents, the ethylene glycol mixture according to the invention can also contain small amounts of other conventional constituents which do not impair the desired properties of the mixture.
Eine solche Ethylenglykolmischung hat den Vorteil, daß sie bei 85 °C Betriebstemperatur eine Funkenspannung von 560- 600 Volt aufweist. Darüber hinaus hat sie den Vorteil, daß sie einen Flammpunkt von 125°C und damit eine sehr geringe Brennbarkeit aufweist .Such an ethylene glycol mixture has the advantage that it has a spark voltage of 560-600 volts at an operating temperature of 85 ° C. In addition, it has the advantage that it has a flash point of 125 ° C and thus a very low flammability.
Ferner gibt die Erfindung einen Al-Elektrolyt-Kondensator an, bei dem der Elektrolyt die erfindungsgemäße Ethylenglykolmi- schung ist. Er weist einen Schichtstapel mit einer Anodenschicht und einer Kathodenschicht auf, zwischen denen eine mit dem Elektrolyten getränkte Trennschicht angeordnet ist . Der Schichtstapel ist in ein mehrkomponentiges Gehäuse eingebaut, das durch ein Abschlußelement abgeschlossen ist.Furthermore, the invention specifies an Al electrolyte capacitor in which the electrolyte is the ethylene glycol mixture according to the invention. It has a layer stack with an anode layer and a cathode layer, between which a separating layer impregnated with the electrolyte is arranged. The layer stack is installed in a multi-component housing, which is closed by a closing element.
Durch die Verwendung der erfindungsgemäßen Ethylenglykolmischung weist der Al-Elektrolyt-Kondensator den Vorteil auf, daß er für Betriebsspannungen zwischen 500 und 600 Volt geeignet ist. Diese Eignung resultiert im Wesentlichen aus der hohen Spannungsfestigkeit der erfindungsgemäßen Ethylenglykolmischung.By using the ethylene glycol mixture according to the invention, the Al electrolytic capacitor has the advantage that it is suitable for operating voltages between 500 and 600 volts. This suitability results essentially from the high dielectric strength of the ethylene glycol mixture according to the invention.
Des weiteren hat der erfindungsgemäße Al-Elektrolyt- Kondensator den Vorteil, daß für die Abdichtung des Gehäuses besonders vorteilhaft ein Abschlußelement aus Phenolharz verwendet werden kann; Phenolharz ist ein billiges Material, das auch besonders einfach bearbeitet werden kann.Furthermore, the aluminum electrolytic capacitor according to the invention has the advantage that a sealing element made of phenolic resin can be used particularly advantageously for sealing the housing; Phenolic resin is an inexpensive material that can also be processed particularly easily.
Ferner gibt die Erfindung die Verwendung der Ethylenglykolmischung als Elektrolyt in einem Al-Elektrolyt-Kondensator für Spannungen zwischen 500 und 600 Volt an. Aufgrund der hohen Spannungsfestigkeit hat die erfindungsgemäße Ethylenglykolmischung den Vorteil, daß sie als Elektrolyt für einen Al- Elektrolyt-Kondensator für Spannungen bis zu 600 Volt geeignet ist.Furthermore, the invention specifies the use of the ethylene glycol mixture as an electrolyte in an Al electrolyte capacitor for voltages between 500 and 600 volts. Because of the high dielectric strength, the ethylene glycol mixture according to the invention has the advantage that it is suitable as an electrolyte for an aluminum electrolytic capacitor for voltages up to 600 volts.
Im Folgenden wird die Erfindung anhand eines Ausführungsbei- spiels und der dazu gehörigen Figur näher erläutert.The invention is explained in more detail below on the basis of an exemplary embodiment and the associated figure.
Die Figur zeigt einen erfindungsgemäßen Al-Elektrolyt- Kondensator im schematischen Querschnitt.The figure shows an Al electrolytic capacitor according to the invention in a schematic cross section.
Die Figur zeigt einen Al-Elektrolyt-Kondensator, bei dem ein Schichtstapel 1 aus Anoden- und Kathodenschichten sowie einer dazwischenliegenden Trennschicht in Form eines Wickels ausgebildet ist, der die Trennschicht in Form einer Papierschicht enthält. Die Papierschicht ist mit der erfindungsgemäßenThe figure shows an Al electrolytic capacitor, in which a layer stack 1 is formed from anode and cathode layers and an intermediate separating layer in the form of a winding, which contains the separating layer in the form of a paper layer. The paper layer is with the invention
Ethylenglykolmischung, die den Elektrolyten bildet, getränkt. Der Wickel ist in ein mehrkomponentiges Gehäuse 2 eingebaut, das einen Becher 4 umfaßt, der mit einem Abschlußelement 3 verschlossen ist. Der Becher 4 kann beispielsweise ein Aluminiumbecher sein. Das Abschlußelement 3 ist vorzugsweise als Phenolharzscheibe ausgeführt und verhindert das Auslaufen des Elektrolyten aus dem Becher 4. Das Gehäuse 2 ist zudem durch eine Dichtung 5, bestehend aus einem Gummiring, nach außen hin abgedichtet, wodurch das Austrocknen des Elektrolyten verhindert wird.Ethylene glycol mixture that forms the electrolyte, soaked. The winding is installed in a multi-component housing 2, which comprises a cup 4, which is closed with a closing element 3. The cup 4 can be an aluminum cup, for example. The closure element 3 is preferably designed as a phenolic resin disk and prevents the electrolyte from leaking out of the cup 4. The housing 2 is also sealed to the outside by a seal 5, consisting of a rubber ring, which prevents the electrolyte from drying out.
Die Anoden- und Kathodenschichten sind durch entsprechende Durchführungen im Abschlußelement 3 mit nach außen ragenden Anschlußelementen 6 leitend verbunden.The anode and cathode layers are conductively connected to the outwardly projecting connection elements 6 by corresponding bushings in the end element 3.
Die Erfindung beschränkt sich nicht auf die beispielhaft gezeigte Ausführungsform, sondern wird in ihrer allgemeinsten Form durch Anspruch 1 und Anspruch 3 definiert . The invention is not limited to the exemplary embodiment shown, but is defined in its most general form by claims 1 and 3.

Claims

Patentansprüche claims
1. Ethylenglykolmischung mit : a) 40 - 85 Gew.-% Ethylenglykol b) 1 - 25 Gew.-% Adipinsäure c) 5 - 20 Gew.-% Sorbit d) 0,5 - 1,5 Gew.-% Phosphorsäure e) 0,5 - 2,0 Gew. -% NH3 f) 3 - 40 Gew.-% Diethylenglykolmonobutylether g) 5 - 18 Gew. -% B203 1. ethylene glycol mixture with: a) 40-85% by weight ethylene glycol b) 1-25% by weight adipic acid c) 5-20% by weight sorbitol d) 0.5-1.5% by weight phosphoric acid e ) 0.5 - 2.0% by weight NH 3 f) 3 - 40% by weight diethylene glycol monobutyl ether g) 5 - 18% by weight B 2 0 3
2. Ethylenglykolmischung nach Anspruch 1 mit a) 50 - 60 Gew.-% Ethylenglykol b) 2 - 3 Gew.-% Adipinsäure c) 10 - 15 Gew.-% Sorbit d) 0,7 - 1,0 Gew.-% Phosphorsäure e) 1,2 - 2,0 Gew. -% NH3 f) 10 - 15 Gew.-% Diethylenglykolmonobutylether g) 10 - 15 Gew.-% B203 2. ethylene glycol mixture according to claim 1 with a) 50-60% by weight ethylene glycol b) 2-3% by weight adipic acid c) 10-15% by weight sorbitol d) 0.7-1.0% by weight Phosphoric acid e) 1.2 - 2.0% by weight NH 3 f) 10 - 15% by weight diethylene glycol monobutyl ether g) 10 - 15% by weight B 2 0 3
3. Al-Elektrolyt-Kondensator mit einer Ethylenglykolmischung nach Anspruch 1 oder 2 als Elektrolyt, bei dem ein SchichtStapel (1) mit einer Anoden- und einer Kathodenschicht sowie einer dazwischenliegenden, mit dem Elektro- lyten getränkten Trennschicht in ein mehrkomponentiges3. Al electrolyte capacitor with an ethylene glycol mixture according to claim 1 or 2 as an electrolyte, in which a layer stack (1) with an anode and a cathode layer and an intermediate separating layer soaked with the electrolyte into a multi-component layer
Gehäuse (2) eingebaut ist, das durch ein Abschlußelement (3) abgeschlossen ist.Housing (2) is installed, which is completed by a closure element (3).
4. Al-Elektrolyt-Kondensator nach Anspruch 3, bei dem das Abschlußelement (3) aus Phenolharz besteht.4. Al electrolytic capacitor according to claim 3, wherein the closing element (3) consists of phenolic resin.
5. Verwendung der Ethylenglykolmischung nach Anspruch 1 oder 2 als Elektrolyt in einem Al-Elektrolyt-Kondensator für Spannungen zwischen 500 und 600 V. 5. Use of the ethylene glycol mixture according to claim 1 or 2 as an electrolyte in an Al electrolytic capacitor for voltages between 500 and 600 V.
EP01929240A 2000-04-05 2001-03-09 Ethylene glycol mixture, al-electrolyte capacitor comprising the ethylene glycol mixture and the use of the ethylene glycol mixture Withdrawn EP1269498A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10016866A DE10016866C2 (en) 2000-04-05 2000-04-05 Ethylene glycol mixture, Al electrolytic capacitor with the ethylene glycol mixture and use of the ethylene glycol mixture
DE10016866 2000-04-05
PCT/DE2001/000910 WO2001078095A1 (en) 2000-04-05 2001-03-09 Ethylene glycol mixture, al-electrolyte capacitor comprising the ethylene glycol mixture and the use of the ethylene glycol mixture

Publications (1)

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EP (1) EP1269498A1 (en)
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DE10121270A1 (en) 2001-04-30 2003-02-06 Epcos Ag Passivation material for an electrical component as well as piezoelectric component in multilayer construction
AU2003236038A1 (en) * 2002-04-10 2003-10-20 Ajinomoto Co., Inc. Recombinant dna having hydantoinase gene and carbamylase gene and process for producing amino acid
DE10251230B4 (en) 2002-11-04 2005-04-21 Epcos Ag Vibration-resistant electrochemical cell and process for its preparation
DE10332093B4 (en) * 2003-07-15 2017-09-14 Epcos Ag Process for producing an electrochemical cell and the electrochemical cell
CN101477899B (en) * 2008-12-29 2010-12-29 南通江海电容器股份有限公司 Aluminum electrolysis capacitor working electrolyte for energy saving lamp and preparation thereof

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JPS546695B1 (en) * 1969-03-24 1979-03-30
JPH02297916A (en) * 1989-05-12 1990-12-10 Toyama Yakuhin Kogyo Kk Electrolyte for aluminum electrolytic capacitor
AU5391296A (en) * 1996-04-12 1997-11-07 Boundary Technologies, Inc. Electrolyte for electrolytic capacitor
US6166899A (en) * 1997-12-18 2000-12-26 Nippon Chemi-Con Corporation Electrolyte for electrolytic capacitor and electrolytic capacitor having the same

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CN1421042A (en) 2003-05-28
US20030089879A1 (en) 2003-05-15
JP2003530709A (en) 2003-10-14
DE10016866C2 (en) 2002-03-14
US6707661B2 (en) 2004-03-16
WO2001078095A1 (en) 2001-10-18
DE10016866A1 (en) 2001-11-15

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