CH230354A - Process for impregnating windings for electrolytic capacitors. - Google Patents
Process for impregnating windings for electrolytic capacitors.Info
- Publication number
- CH230354A CH230354A CH230354DA CH230354A CH 230354 A CH230354 A CH 230354A CH 230354D A CH230354D A CH 230354DA CH 230354 A CH230354 A CH 230354A
- Authority
- CH
- Switzerland
- Prior art keywords
- electrolyte
- diluent
- electrolytic capacitors
- windings
- impregnating
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- 238000004804 winding Methods 0.000 title claims description 8
- 239000003990 capacitor Substances 0.000 title claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 16
- 239000003085 diluting agent Substances 0.000 claims description 9
- 238000009835 boiling Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 1
- 238000005490 dry winding Methods 0.000 claims 1
- 238000002791 soaking Methods 0.000 claims 1
- 238000005470 impregnation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G9/02—Diaphragms; Separators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
Verfahren zum Tränken von Wickeln für Elektrolytkondensatoren. Das vollständige Durchtränken von Wik- keln für Elektrolytkondensatoren macht oft Schwierigkeiten, namentlich dann, wenn es eich um breitere Wickel handelt und dass verwendete Papier sehr dünn, der Elektrolyt aber, mit dem das Papier getränkt werden soll, verhältnismässig dickflüssig ist. Häufig verbleibt dann in der Mitte des Wickels ein Streifen, der nicht oder nicht genügend ge tränkt ist.
Um dies zu vermeiden, sind die Wickel bisher meist in der Weise getränkt worden, dass der heisse Elektrolyt mit Hilfe eines Vakuums oder durch Druck in den Wickel eingesaugt bezw. eingepresst wird. Beide Ver fahren sind umständlich und führen oft zu einer unerwünschten Veränderung des Elek trolyten. Fes ist auch bekannt, die zwischen den Metallfolien befindlichen Faserstoff streifen schon bei der Herstellung des Trok- kenwickels mit dem Elektrolyten zu tränken und die so hergestellten Wickel dann einer späteren Nachtränkung nach einem jener Verfahren zu unterziehen. Gemäss der Erfindung wird nun dem Elektrolyten vor dem Tränken der Trocken wickel ein Verdünnungsmittel zugesetzt, das den Wickeln nach dem Tränken wieder ent zogen wird.
Dadurch kann nach dem Trän ken der Wickel die ursprünglich vorhandene oder gewünschte Viskosität des Elektrolyten im Wickel hergestellt werden. Die Konden satorwickel können so auf einfache Art voll ständig mit einem hochviskosen Elektrolyten durchtränkt werden.
Das Verdünnungsmittel, das dem Elek trolyten vor dem Tränken der Wickel zu gesetzt wird, ist vorzugsweise eine Flüssig keit, die sich gegenüber dem Elektrolyten neutral verhält. Die Zusatzflüssigkeit kann ein Stoff sein, der schon einen Bestandteil des Elektrolyten bildet. Geeignete Zusatzflüssig keiten sind zum Beispiel Wasser oder organische Flüssigkeiten, wie Alkohole und ihire Abkömmlinge.
Für die spätere Entziehung des Verdün- nungsmmttels aus dem Elektrolyten, die nach dem Tränken mach einem geeigneten Ver- fahren erfolgen kann, zum Beispiel durch Er hitzen der getränkten Wickel oder durch Behandlung derselben im Vakuum bei nie derer oder höherer Temperatur, ist es vorteil haft, wenn der Siedepunkt des verwendeten Verdünnungsmittels tiefer liegt als der des zu verdünnenden Elektrolyten.
Das Ent ziehen des Verdünnungsmittels aus dem Elektrolyten kann so lange fortgesetzt wer den, bis der Elektrolyt die gewünschte Viskosität hat.
Process for impregnating windings for electrolytic capacitors. The complete saturation of coils for electrolytic capacitors often causes difficulties, especially when it is a question of wider coils and the paper used is very thin, but the electrolyte with which the paper is to be impregnated is relatively thick. Often a strip remains in the middle of the roll that is not or not sufficiently saturated.
To avoid this, the coils have so far mostly been soaked in such a way that the hot electrolyte is sucked into the coil with the aid of a vacuum or by pressure. is pressed in. Both processes are cumbersome and often lead to an undesirable change in the electrolyte. It is also known to impregnate the fibrous material strips located between the metal foils with the electrolyte during the manufacture of the dry roll and then to subject the roll produced in this way to subsequent impregnation by one of those processes. According to the invention, a diluent is added to the electrolyte before impregnation of the dry roll, which is then withdrawn from the rolls after impregnation.
As a result, the originally present or desired viscosity of the electrolyte in the roll can be produced after the winding has been soaked. The capacitor windings can be soaked completely in a simple way with a highly viscous electrolyte.
The diluent that is added to the electrolyte before the winding is soaked is preferably a liquid that is neutral to the electrolyte. The additional liquid can be a substance that already forms part of the electrolyte. Suitable additional liquids are, for example, water or organic liquids, such as alcohols and their derivatives.
It is advantageous for the later removal of the diluent from the electrolyte, which can be carried out using a suitable process after the impregnation, for example by heating the impregnated winding or treating it in a vacuum at a lower or higher temperature if the boiling point of the diluent used is lower than that of the electrolyte to be diluted.
The removal of the diluent from the electrolyte can be continued until the electrolyte has the desired viscosity.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH230354T | 1942-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH230354A true CH230354A (en) | 1943-12-31 |
Family
ID=4456564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH230354D CH230354A (en) | 1942-04-23 | 1942-04-23 | Process for impregnating windings for electrolytic capacitors. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH230354A (en) |
-
1942
- 1942-04-23 CH CH230354D patent/CH230354A/en unknown
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