WO1998038659A1 - Electric capacitor - Google Patents
Electric capacitor Download PDFInfo
- Publication number
- WO1998038659A1 WO1998038659A1 PCT/DE1998/000478 DE9800478W WO9838659A1 WO 1998038659 A1 WO1998038659 A1 WO 1998038659A1 DE 9800478 W DE9800478 W DE 9800478W WO 9838659 A1 WO9838659 A1 WO 9838659A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal layers
- plastic film
- metal
- capacitor
- layers
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 239000002985 plastic film Substances 0.000 claims abstract description 24
- 229920006255 plastic film Polymers 0.000 claims abstract description 24
- 239000011888 foil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc 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
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/015—Special provisions for self-healing
Definitions
- the invention relates to an electrical capacitor, in particular a stacked or layered capacitor, with an internal series connection and very low capacitance values, which consists of at least two plastic films arranged one above the other and provided with regenerable metal layers, in which the metal layers on the first plastic film up to both Edges extend and are separated from one another by a metal-free strip, in which the second plastic film has a smaller width than the first plastic film and is provided with separate metal layers which serve as a blind covering and cover the metal-free strip on the first plastic film and in which the end faces are contacted with flame-sprayed Schoop layers.
- capacitors For extremely low capacitance values, capacitors have therefore hitherto been relied on, which consist of plastic foils and in which the electrodes are formed by aluminum foils.
- regenerable capacitors cannot be regenerated and the entire capacitor is destroyed in the event of a short circuit. It is an object of the present invention to develop the regenerable capacitor mentioned at the outset in such a way that extremely low capacitance values are also obtained with regenerable capacitors.
- the metal layers preferably have a circular or elliptical or a square or rectangular cross section.
- capacitors with extremely low capacitance values can be produced by the embodiment according to the invention.
- a regenerable capacitor with an internal series connection is already known, in which the blind covering consists of individual metal layers separated from one another, but these metal layers essentially cover the entire width of the plastic film.
- the division of the blind covering in the known capacitor also does not serve to obtain particularly low capacitance values, but is intended to improve the insulation resistance, in particular at low voltages, and at the same time provide the possibility of being able to manufacture such capacitors with a small capacitance tolerance without any appreciable rejects.
- metal layers 3, 4 for example made of aluminum, zinc or alloys with possibly other metals, are arranged in such a way that they reach the edges of the plastic film 1 are sufficient where they can be contacted with Schoop layers not shown in the figure.
- the second plastic film 2 has a plurality of metal layers 5 which are separate from one another and which, according to the exemplary embodiment, have a circular cross section, but can also have other shapes, such as the cross section of an ellipse, a square or rectangle or other suitable cross-sectional shapes.
- the metal layers 5 cover the metal-free strip 8, which is arranged on the film 1, only slightly.
- a capacitor with an internal series connection is thus formed, which consists of two capacitor elements connected in series, namely between the metal layers 4 and 5 or 5 and 3.
- a capacitor which consists of capacitors connected in pairs in series, which are connected in parallel in their entirety.
- the size of the capacitance value is determined by the degree of coverage of the metal layers 3/5 or 4/5 and can therefore be made as small as desired.
- the metal structuring on the foils 1 and 2 can be produced in a known manner, for example by passing the continuously metallized foils past the burn-out rollers, the structuring according to the invention being achieved in the desired manner by burning away the metal layers.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention relates to an electric capacitor, especially a film or stack capacitor, with an inner series connection, comprising at least two plastic films (1,2) which are provided with metal layers (3,4,5). Both metal layers (3,4) are separated from the first plastic film (1) by a metal-free strip (8) which is covered by metal layers. The metal layers have a circular or elliptical cross section and define the capacitance of the capacitor.
Description
Beschreibungdescription
Elektrischer -KondensatorElectric capacitor
Die Erfindung betrifft einen elektrischen Kondensator, insbesondere Stapel- beziehungsweise Schichtkondensator, mit innerer Reihenschaltung und sehr geringen Kapazitätswerten, der aus zumindest zwei übereinander angeordneten und mit regenerierfähigen Metallschichten versehenen Kunststoffolien be- steht, bei dem die Metallschichten auf der ersten Kunststoff- folie bis an beide Ränder reichen und durch einen metall- freien Streifen voneinander getrennt sind, bei dem die zweite Kunststoffolie eine geringere Breite als die erste Kunststoffolie besitzt und mit voneinander getrennten als Blind- belag dienenden Metallschichten versehen ist, die den metall- freien Streifen auf der ersten Kunststoffolie überdecken und bei dem die Stirnseiten mit flammgespritzten Schoopschichten kontaktiert sind.The invention relates to an electrical capacitor, in particular a stacked or layered capacitor, with an internal series connection and very low capacitance values, which consists of at least two plastic films arranged one above the other and provided with regenerable metal layers, in which the metal layers on the first plastic film up to both Edges extend and are separated from one another by a metal-free strip, in which the second plastic film has a smaller width than the first plastic film and is provided with separate metal layers which serve as a blind covering and cover the metal-free strip on the first plastic film and in which the end faces are contacted with flame-sprayed Schoop layers.
Elektrische Kondensatoren, die aus Kunststoffolien mit regenerierfähig dünnen Metallschichten aufgebaut sind, können aufgrund ihrer Herstellungsweise nicht für beliebig kleine Kapazitätswerte ausgelegt werden. Zum einen sind durch internationale Festlegungen Rastermaße kleiner als 5 mm nicht vor- gesehen und zum anderen müssen herstellungsbedingt mehrereElectrical capacitors, which are made of plastic films with regenerable thin metal layers, cannot be designed for arbitrarily small capacitance values due to their manufacturing method. On the one hand, grid dimensions smaller than 5 mm are not provided due to international specifications, and on the other hand, due to the manufacturing process, several are required
(wesentlich größer als 2) Lagen von Kunststoffolien übereinander angeordnet sein, da sonst das Kondensatorpaket nicht stabil ist.(Much larger than 2) layers of plastic films must be arranged one above the other, since otherwise the capacitor pack is not stable.
Für extrem niedrige Kapazitätswerte ist man deswegen bislang auf Kondensatoren angewiesen, die aus Kunststoffolien bestehen und bei denen die Elektroden durch Aluminiumfolien gebildet werden.For extremely low capacitance values, capacitors have therefore hitherto been relied on, which consist of plastic foils and in which the electrodes are formed by aluminum foils.
Derartige Kondensatoren sind allerdings nicht regenerierfähig und bei einem Kurzschluß wird der gesamte Kondensator zerstört.
Aufgabe der vorliegenden Erfindung ist es, den eingangs genannten regenerierfähigen Kondensator derart weiterzubilden, daß auch extrem niedrige Kapazitätswerte bei regenerierfähi- gen Kondensatoren erhalten werden.However, such capacitors cannot be regenerated and the entire capacitor is destroyed in the event of a short circuit. It is an object of the present invention to develop the regenerable capacitor mentioned at the outset in such a way that extremely low capacitance values are also obtained with regenerable capacitors.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Metallschichten auf der zweiten Kunststoffolie den metallfreien Streifen nur geringfügig überdecken.This object is achieved in that the metal layers on the second plastic film cover the metal-free strip only slightly.
Vorzugsweise besitzen die Metallschichten einen kreis- beziehungsweise elliptischen oder einen quadratischen beziehungsweise rechteckförmigen Querschnitt.The metal layers preferably have a circular or elliptical or a square or rectangular cross section.
Da die Kapazität eines Kondensators durch die Fläche der gegenüberliegenden Elektroden bestimmt wird, lassen sich durch die erfindungsgemäße Ausführungsform Kondensatoren mit extrem geringen Kapazitätswerten herstellen.Since the capacitance of a capacitor is determined by the area of the opposite electrodes, capacitors with extremely low capacitance values can be produced by the embodiment according to the invention.
Aus der DT-AS 1 073 630 ist zwar bereits ein regenerierfähiger Kondensator mit innerer Reihenschaltung bekannt, bei dem der Blindbelag aus einzelnen gegeneinander getrennten Metall- schichten besteht, jedoch überdecken diese Metallschichten im wesentlichen die gesamte Breite der Kunststoffolie. Die Auf- teilung des Blindbelags beim bekannten Kondensator dient auch nicht dazu, besonders niedrige Kapazitätswerte zu erhalten, sondern soll den Isolationswiderstand, insbesondere bei niederen Spannungen, verbessern und gleichzeitig die Möglichkeit schaffen, solche Kondensatoren mit kleiner Kapazitätstoleranz ohne nennenswerten Ausschuß fertigen zu können.From DT-AS 1 073 630 a regenerable capacitor with an internal series connection is already known, in which the blind covering consists of individual metal layers separated from one another, but these metal layers essentially cover the entire width of the plastic film. The division of the blind covering in the known capacitor also does not serve to obtain particularly low capacitance values, but is intended to improve the insulation resistance, in particular at low voltages, and at the same time provide the possibility of being able to manufacture such capacitors with a small capacitance tolerance without any appreciable rejects.
Der Gegenstand der Erfindung wird anhand eines Ausführungs- beispiels näher erläutert.The object of the invention is explained in more detail using an exemplary embodiment.
In der dazugehörenden Zeichnung mit einer einzigen Figur sind in Aufsicht und Schnitt zwei Kunststoffolien l, 2 darge-
stellt, die mit regenerierfähig dünnen Metallschichten 3, 4, 5, 6, 7 versehen sind.In the accompanying drawing with a single figure, two plastic films 1, 2 are shown in a top view and in section. provides, which are provided with regenerable thin metal layers 3, 4, 5, 6, 7.
Auf der Kunststoffolie 1, die beispielsweise aus Polyethylen- terephthalat oder einem anderen, geeigneten Werkstoff besteht, sind Metallschichten 3, 4, zum Beispiel aus Aluminium, Zink oder Legierungen mit gegebenenfalls noch weiteren Metallen, derart angeordnet, daß sie bis an die Ränder der Kunststoffolie 1 reichen, wo sie mit in der Figur nicht darge- stellten Schoopschichten kontaktiert werden können.On the plastic film 1, which consists for example of polyethylene terephthalate or another suitable material, metal layers 3, 4, for example made of aluminum, zinc or alloys with possibly other metals, are arranged in such a way that they reach the edges of the plastic film 1 are sufficient where they can be contacted with Schoop layers not shown in the figure.
In der Mitte zwischen den beiden Metallschichten 3, 4 befindet sich ein metallfreier Zwischenraum.In the middle between the two metal layers 3, 4 there is a metal-free space.
Die zweite Kunststoffolie 2 besitzt in ihrem mittleren Bereich mehrere voneinander getrennte Metallschichten 5, die gemäß dem Ausführungsbeispiel einen kreisförmigen Querschnitt aufweisen, aber auch andere Formen, wie zum Beispiel den Querschnitt einer Ellipse, eines Quadrats oder Rechtecks oder weitere geeignete Querschnittsformen besitzen können.In its central region, the second plastic film 2 has a plurality of metal layers 5 which are separate from one another and which, according to the exemplary embodiment, have a circular cross section, but can also have other shapes, such as the cross section of an ellipse, a square or rectangle or other suitable cross-sectional shapes.
Wie aus der Figur ersichtlich ist, überdecken die Metall- schichten 5 den metallfreien Streifen 8, der auf der Folie 1 angeordnet ist nur geringfügig.As can be seen from the figure, the metal layers 5 cover the metal-free strip 8, which is arranged on the film 1, only slightly.
Es wird somit ein Kondensator mit innerer Reihenschaltung gebildet, der aus zwei in Reihe geschalteten Kondensatorelementen und zwar zwischen den Metallschichten 4 und 5 beziehungsweise 5 und 3 besteht .A capacitor with an internal series connection is thus formed, which consists of two capacitor elements connected in series, namely between the metal layers 4 and 5 or 5 and 3.
Da die Metallschichten 5 voneinander getrennt sind, entsteht somit ein Kondensator, der aus paarweise in Reihe geschalteten Kondensatoren besteht, die in ihrer Gesamtheit parallel geschaltet sind.
Die Größe des Kapazitätswertes wird durch den Überdeckungs- grad der Metallschichten 3/5 beziehungsweise 4/5 bestimmt und kann damit beliebig klein ausgestaltet werden.Since the metal layers 5 are separated from one another, a capacitor is thus formed which consists of capacitors connected in pairs in series, which are connected in parallel in their entirety. The size of the capacitance value is determined by the degree of coverage of the metal layers 3/5 or 4/5 and can therefore be made as small as desired.
Es ist möglich, die Randbereiche der Kunststoffolie 2 ebenfalls mit Metallschichten 6, 7 zu versehen, die jedoch auf den Kapazitätswert keinen Einfluß haben.It is possible to also provide the edge areas of the plastic film 2 with metal layers 6, 7, which, however, have no influence on the capacitance value.
Die Herstellung der Metallstrukturierung auf den Folien 1 und 2 kann in bekannter Weise erfolgen, indem beispielsweise die durchgehend metallisierten Folien an Ausbrennwalzen vorbeigeführt werden, wobei durch Wegbrennen der Metallschichten in gewünschter Weise die erfindungsgemäße Strukturierung erreicht wird.The metal structuring on the foils 1 and 2 can be produced in a known manner, for example by passing the continuously metallized foils past the burn-out rollers, the structuring according to the invention being achieved in the desired manner by burning away the metal layers.
Es sind aber auch weitere aus dem Stand der Technik bekannte Herstellungsarten möglich, indem zum Beispiel die Metallstrukturierung durch Abdeckung erzeugt wird oder das Abbrennen von Metallschichten durch Einwirkung eines Lasers er- folgt.
However, other types of production known from the prior art are also possible, for example by producing the metal structuring by covering or by burning off metal layers by the action of a laser.
Claims
1. Elektrischer Kondensator, insbesondere Stapel- beziehungsweise Schichtkondensator, mit innerer Reihenschaltung und sehr geringen Kapazitätswerten, der aus zumindest zwei übereinander angeordneten und mit regenerierfähigen Metallschichten (3, 4, 5) versehenen Kunststoffolien (l, 2) besteht, bei dem die Metallschichten (3, 4) auf der ersten Kunststoffolie1. An electrical capacitor, in particular a stacked or layered capacitor, with an internal series connection and very low capacitance values, which consists of at least two plastic films (1, 2) arranged one above the other and provided with regenerable metal layers (3, 4, 5), in which the metal layers ( 3, 4) on the first plastic film
(1) bis an beide Ränder reichen und durch einen metallfreien Streifen (8) voneinander getrennt sind, bei dem die zweite(1) reach to both edges and are separated from each other by a metal-free strip (8), in which the second
Kunststoffolie (2) eine geringere Breite als die erste Kunststoffolie (1) besitzt und mit voneinander getrennten als Blindbelag dienenden Metallschichten (5) versehen ist, die den metallfreien Streifen (8) auf der ersten Kunststoffolie (1) überdecken und bei dem die Stirnseiten mit flammgespritzten Schoopschichten kontaktiert sind, dadurch gekennzeichnet, daß die Metallschichten (5) auf der zweiten KunststoffoliePlastic film (2) has a smaller width than the first plastic film (1) and is provided with separate metal layers (5) serving as a blind covering, which cover the metal-free strip (8) on the first plastic film (1) and in which the end faces flame-sprayed Schoop layers are contacted, characterized in that the metal layers (5) on the second plastic film
(2) den metallfreien Streifen (8) nur geringfügig überdecken.(2) cover the metal-free strip (8) only slightly.
2. Elektrischer Kondensator nach Anspruch 1, dadurch gekennzeichnet, daß die Metallschichten (5) auf der zweiten Kunststoffolie (2) einen kreisförmigen oder elliptischen Querschnitt besit- zen.2. Electrical capacitor according to claim 1, characterized in that the metal layers (5) on the second plastic film (2) have a circular or elliptical cross section.
3. Elektrischer Kondensator nach Anspruch 1, dadurch gekennzeichnet, daß die Metallschichten (5) auf der zweiten Kunststoffolie (2) einen quadratischen oder rechteckförmigen Querschnitt besitzen.
3. Electrical capacitor according to claim 1, characterized in that the metal layers (5) on the second plastic film (2) have a square or rectangular cross section.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53716398A JP2001513263A (en) | 1997-02-28 | 1998-02-17 | Electric capacitor |
| EP98912268A EP0976136A1 (en) | 1997-02-28 | 1998-02-17 | Electric capacitor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19708305.6 | 1997-02-28 | ||
| DE1997108305 DE19708305C2 (en) | 1997-02-28 | 1997-02-28 | Electric capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998038659A1 true WO1998038659A1 (en) | 1998-09-03 |
Family
ID=7821912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1998/000478 WO1998038659A1 (en) | 1997-02-28 | 1998-02-17 | Electric capacitor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0976136A1 (en) |
| JP (1) | JP2001513263A (en) |
| DE (1) | DE19708305C2 (en) |
| WO (1) | WO1998038659A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160038751A1 (en) * | 2014-08-08 | 2016-02-11 | Newpace Ltd. | Capacitor configuration for subcutaneous implantable cardioverter-defibrillators |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1073630B (en) * | 1960-01-21 | Siemens S. Halske Aktiengesellschaft, Berlin und München | Regenerative capacitor, especially for low voltages |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2045345A1 (en) * | 1970-09-14 | 1972-03-23 | Roederstein Kondensatoren | Electric capacitor |
-
1997
- 1997-02-28 DE DE1997108305 patent/DE19708305C2/en not_active Expired - Fee Related
-
1998
- 1998-02-17 EP EP98912268A patent/EP0976136A1/en not_active Withdrawn
- 1998-02-17 WO PCT/DE1998/000478 patent/WO1998038659A1/en not_active Application Discontinuation
- 1998-02-17 JP JP53716398A patent/JP2001513263A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1073630B (en) * | 1960-01-21 | Siemens S. Halske Aktiengesellschaft, Berlin und München | Regenerative capacitor, especially for low voltages |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0976136A1 (en) | 2000-02-02 |
| JP2001513263A (en) | 2001-08-28 |
| DE19708305A1 (en) | 1998-09-10 |
| DE19708305C2 (en) | 2001-06-07 |
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