JP2016134477A - Metalization film capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further ensure an electric contact between a metalized film and a metallikon by preventing the material of the metallikon from being hard to enter between film members when a metalization film capacitor is manufactured.SOLUTION: A metalization film capacitor 100 is equipped with: a metalization film 10 which has a film member 11 and a metal film 12 formed on a surface of the film member 11; and a pair of metallikons 20 formed by spraying metal. The metalization film 10 is laminated or wound so as to form projecting portions 13 exposing the metal film 12 by alternately projecting one side and the other side in a width direction to the opposite side. Of the pair of the metallikons 20, one is connected to the metal film 12 exposed to the projecting portion 13 on the one side in the width direction, and the other is connected to the metal film 12 exposed to the projecting portion 13 on the other side in the width direction. The metalization film capacitor 100 is equipped with a metal needle 30 penetrating the projecting portions 13 and keeping clearance between the projecting portions 13.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a metallized film capacitor.

  Conventionally, a metallized film capacitor is known (see, for example, Patent Document 1 below). The film capacitor described in Patent Document 1 is configured by sequentially superposing first to fourth film members each having a metal film formed on at least one surface thereof. The first and third film members constitute a first film pair, and the second and fourth film members constitute a second film pair. The first film pair is disposed so as to protrude in one of the width directions with respect to the second film pair. The first film member is arranged so as to protrude in one direction of the width direction with respect to the third film member and to expose the metal film.

  According to the film capacitor described in Patent Document 1, since the second to fourth film members can be interposed between the first film members adjacent in the stacking direction, the first film member adjacent in the stacking direction. The interval of becomes larger. Moreover, in the 1st film pair, the 3rd film member is dented and arrange | positioned at the other of the width direction with respect to the 1st film member. Accordingly, the lump of electrode members easily enters between the first film members adjacent in the stacking direction. In the first film pair, since the metal film is exposed by projecting the first film member to one side in the width direction with respect to the third film member, the electrode member can be easily connected to the metal film of the first film member. .

JP 2013-4908 A

  With the miniaturization of film capacitors, the thickness of films has been reduced. In the film capacitor described in Patent Document 1, the metal film of the metallized film and the metallicon can be easily contacted. However, when the metallized film is bent in the laminating direction when the metallized film is sprayed by thinning the metallized film. There is. In this case, the metal material of the metallicon becomes difficult to enter between the metallized films, and the contact area between the metallicon and the metal film of the metallized film may be reduced, and the electrical contact may be insufficient.

  The present invention has been made in view of the above-described problems, and prevents the metallicon and the metal from becoming difficult to enter between the film members when the metallized film capacitor is manufactured by thinning the film member. It is an object of the present invention to make electrical contact with the metal film of the chemical film more reliable.

  In order to achieve the above object, a metallized film capacitor of the present invention includes a metallized film having a film member and a metal film formed on the surface of the film member, a pair of metallicons formed by metal spraying, The metallized film is laminated such that one side and the other side in the width direction are alternately projected to the opposite side to form a protruding portion exposing the metal film. Or is wound and one of the pair of metallicons is connected to the metal film exposed at the protruding portion on the one side, and the other is connected to the metal film exposed at the protruding portion on the other side, A metal needle that penetrates the protrusion and maintains a gap between the protrusions is provided.

  In order to manufacture the metallized film capacitor of the present invention, first, a metallized film having a film member and a metal film formed on the surface of the film member is prepared. The metallized film can be produced, for example, by forming a metal film by vapor deposition or the like on at least one surface of a film member made of a dielectric material such as a plastic film. When the metallized film capacitor is a laminated type, for example, when laminating a plurality of metallized films, one side and the other side in the width direction of the metallized film are alternately projected to the opposite side to form a metal film The protrusion part which exposed is formed.

  When the metallized film capacitor is a winding type, for example, a pair of band-shaped metallized films are opposed to each other, and one side in the width direction of one metallized film and the other in the width direction of the other metallized film. They are shifted in the width direction and overlapped so that the sides protrude. In this state, by winding a pair of band-shaped metallized films, one side of the width direction of one metallized film and the other side of the other metallized film are alternately projected to the opposite side to form a metal A protrusion exposing the film is formed.

  Next, a metal needle for penetrating the protrusion and maintaining the gap between the protrusions is prepared. As a material of the metal needle, for example, a metal material similar to that of a metallized film capacitor lead wire or metallicon can be used. When penetrating the metal needle through the protrusion, for example, the metal needle may be heated. Thereby, when letting a metal needle penetrate the protrusion part of a metallized film, the film member of a protrusion part can be plasticized with the heat | fever of a metal needle, for example, and a metal needle can be easily penetrated to a protrusion part. In addition, after the metal needle penetrates the protrusion, the temperature of the plasticized film member is lowered and hardened, so that the protrusion is fixed to the metal needle, and the interval between the protrusions is fixed and maintained. Is done.

  In addition, the method of making a metal needle penetrate the protrusion part is not limited to the method of heating a metal needle. For example, the protrusion may be pierced without heating the metal needle. Alternatively, a through hole having a diameter corresponding to the metal needle may be formed in the protrusion, and the metal needle may be inserted into the through hole of the protrusion. Alternatively, a metal needle may be arranged in advance and a metallized film may be laminated around the metal needle.

  Next, a pair of metallicons is formed by metal spraying. One of the pair of metallicons is connected to the metal film exposed at the protruding portion on one side in the width direction of the metallized film, and the other is connected to the metal film exposed at the protruding portion on the other side in the width direction of the metallized film. The At this time, bending stress acts on the protrusions due to metal spraying, and the protrusions may collapse so as to eliminate the gap between the protrusions. According to the metallized film capacitor of the present invention, the protrusions A gap between the protrusions is maintained by a metal needle penetrating through.

  Therefore, according to the metallized film capacitor of the present invention, the gap between the protrusions is maintained by the metal needle during the formation of the metallicon, the metallicon material enters the gap between the protrusions, and the metal film exposed to the protrusion is removed from the metallicon. Can be contacted sufficiently and reliably. Therefore, even if the gap between the protrusions becomes smaller than before due to the thinning of the metallized film or the rigidity of the protrusions decreases, the contact area between the metallicon and the metal film of the metallized film is secured. These electrical contacts can be made more reliable.

  As can be understood from the above description, according to the metallized film capacitor of the present invention, it is possible to prevent the metallicon material from entering between the film members when the metalized film capacitor is manufactured by thinning the film member. Thus, electrical contact between the metallicon and the metal film of the metallized film can be further ensured.

1 is a perspective view of a metallized film capacitor according to an embodiment of the present invention. The expanded sectional view of the metallized film capacitor which follows the II-II line shown in FIG. The perspective view which shows the modification of the metallized film capacitor | condenser shown in FIG. The perspective view of the conventional metallized film capacitor. The expanded sectional view of the conventional metallized film capacitor.

  Hereinafter, embodiments of the metallized film capacitor of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a metallized film capacitor 100 according to the present embodiment. FIG. 2 is an enlarged cross-sectional view of the metallized film capacitor 100 taken along the line II-II shown in FIG. In addition, in FIG. 1, in order to make the structure of the metallized film capacitor 100 of this embodiment easy to understand, the illustration of the metallicon 20 is omitted.

  The metallized film capacitor 100 of this embodiment includes a metallized film 10, a pair of metallicons 20, and a metal needle 30. The metallized film 10 has a film member 11 and a metal film 12 formed on the surface of the film member 11. The metallized film 10 can be manufactured by forming the metal film 12 on at least one surface of the film member 11 by vapor deposition or the like.

  The metallized film capacitor 100 of this embodiment is a laminated film capacitor, and is formed by laminating a plurality of metallized films 10. The metallized film 10 is laminated so as to form a protruding portion 13 in which the metal film 12 is exposed by alternately protruding one side and the other side in the width direction to the opposite side.

  As the dielectric that is the material of the film member 11, for example, a plastic film such as polyethylene terephthalate (PET), polypropylene (PP), polyphenylene sulfide (PPS), polyethylene naphthalate (PEN), polyvinylidene fluoride (PVDF), or the like is used. be able to. As a material of the metal film 12, for example, aluminum (Al) or zinc (Zn) can be used.

  The pair of metallicons 20 are sprayed metal electrodes formed by spraying metal. As a material of the metallicon 20, for example, tin (Sn), copper (Cu), zinc (Zn), or the like can be used. Of the pair of metallicons 20, one metallicon 20 is connected to the metal film 12 exposed at the protruding portion 13 on one side S <b> 1 in the width direction of the metallized film 10, and the other metallicon 20 is in the width direction of the metallized film 10. The metal film 12 exposed to the protruding portion 13 on the other side S2 is connected.

  The metal needle 30 penetrates the protruding portion 13 of the metallized film 10 and maintains a gap between the protruding portions 13. More specifically, the protrusion of the metallized film 10 is caused by an adhesion force caused by the film member 11 of the metallized film 10 being welded to the metal needle 30 or a frictional force between the metal needle 30 and the metallized film 10. The portion 13 is fixed to the metal needle 30, and the bending of the protruding portion 13 is prevented by the rigidity of the metal needle 30, and the interval between the protruding portions 13 is maintained.

  As the material of the metal needle 30, for example, the same material as that of the lead wire of the metallized film capacitor 100, for example, iron (Fe), copper (Cu), tin (Sn), etc. can be used. Alternatively, tin-plated copper wire or the like can be used. The metal needle 30 preferably has a melting point equal to or higher than the spraying temperature of the metallicon. In the metallized film capacitor 100 of this embodiment, the metal needle 30 can be used as a lead wire, but the lead wire may be provided separately from the metal needle 30.

  In order to manufacture the metallized film capacitor 100 of this embodiment, first, the metallized film 10 is prepared. And when laminating | stacking the some metallized film 10, the one side and the other side of the width direction of the metallized film 10 are made to protrude alternately on the opposite side, and the protrusion part 13 which exposed the metal film 12 is formed. . Next, a metal needle 30 is prepared for penetrating the protrusion 13 and maintaining the gap between the protrusions 13.

  When penetrating the metal needle 30 through the protruding portion 13, for example, the metal needle 30 may be heated. Thereby, when the metal needle 30 is penetrated into the protruding portion 13 of the metallized film 10, for example, the film member 11 of the protruding portion 13 is plasticized by the heat of the metal needle 30, and the metal needle 30 is easily formed into the protruding portion 13. Can be penetrated. In addition, after the metal needle 30 penetrates the protruding portion 13, the film member 11 of the protruding portion 13 is welded to the metal needle 30 and fixed by the temperature of the plasticized film member 11 being lowered and hardening. Thus, the interval between the protrusions 13 is fixed and maintained.

  Note that the method of causing the metal needle 30 to penetrate the protruding portion 13 is not limited to the method of heating the metal needle 30. For example, the tip of the metal needle 30 may be pierced and penetrated into the protruding portion 13 without heating the metal needle 30. Alternatively, a through hole having an inner diameter corresponding to the outer diameter of the metal needle 30 may be formed in the protruding portion 13, and the metal needle 30 may be inserted through the through hole. Alternatively, the metal needle 30 may be disposed in advance and the metallized film 10 may be laminated around the metal needle 30.

  Next, a pair of metallicons 20 is formed by metal spraying. One of the pair of metallicons 20 is connected to the metal film 12 exposed at the protrusion 13 on one side S1 in the width direction of the metallized film 10, and the other is the protrusion 13 on the other side S2 in the width direction of the metallized film 10. Is connected to the exposed metal film 12. At this time, in the conventional metallized film capacitor, bending stress may act on the protrusions due to metal spraying, and the protrusions may collapse so as to eliminate the gap between the protrusions.

  FIG. 4 is a perspective view of a conventional metalized film capacitor 900 corresponding to FIG. FIG. 5 is an enlarged cross-sectional view of a conventional metalized film capacitor 900 corresponding to FIG.

  In the conventional metallized film capacitor 900, as described above, bending stress acts on the protrusions 913 due to thermal spraying of the metal during the formation of the metallicon 920, and the protrusions 913 collapse so as to eliminate the gaps between the protrusions 913. There is a case. In this case, the metallicon 920 cannot enter between the protrusions 913, and the contact area between the metallicon 920 and the metal film 912 of the metallized film 910 is reduced, and the electrical contact may not be stable.

  On the other hand, the metallized film capacitor 100 of the present embodiment shown in FIGS. 1 and 2 includes a metal needle 30 that penetrates the protrusion 13, and the gap between the protrusions 13 is maintained by the metal needle 30. That is, even when bending stress acts on the protrusion 13 due to thermal spraying of metal when the metallicon 20 is formed, the protrusion 13 is supported by the metal needle 30 penetrating the protrusion 13 and prevents the protrusion 13 from bending or falling. be able to.

  More specifically, since the metal needle 30 penetrates the protrusion 13, a frictional force acts between the metal needle 30 and the protrusion 13, or the protrusion 13 is deformed by the metal needle 30. Even if a bending stress is applied to the protruding portion 13, the gap between the protruding portions 13 is maintained by the metal needle 30. Moreover, in the protrusion 13, when the film member 11 of the metallized film 10 is fixed to the metal needle 30 by welding, for example, the protrusion 13 may move relative to the metal needle 30. Is prevented.

  Thus, by maintaining the gap between the protrusions 13 during the formation of the metallicon 20 and preventing the protrusion 13 from bending or falling, the material of the metallicon 20 enters the gap between the protrusions 13, The exposed metal film 12 can be sufficiently and reliably brought into contact with the metallicon 20. Therefore, for example, even if the gap between the protrusions 13 becomes smaller than before due to the thinning of the metallized film 10 or the rigidity of the protrusions 13 is lowered, the metal film of the metallicon 20 and the metallized film 10 is reduced. The contact area with 12 can be ensured, and these electrical contacts can be made more reliable.

  As described above, according to the metallized film capacitor 100 of the present embodiment, even when the film member 11 is thinned, the material of the metallicon 20 is between the film members 11 when the metallized film capacitor 100 is manufactured. It is possible to prevent the metallicon 20 and the metal film 12 of the metallized film 10 from coming into contact with each other more reliably. In the above-described embodiment, the multilayer metallized film capacitor 100 has been described. However, the present invention can also be applied to a wound metallized film capacitor.

  Hereinafter, an embodiment of a wound metallized film capacitor, which is a modification of the metallized film capacitor 100 according to the above-described embodiment, will be described with reference to FIG. FIG. 3 is a perspective view showing a wound metallized film capacitor 200 according to an embodiment of the present invention. 2 is used as an enlarged cross-sectional view taken along the line II-II in FIG.

  The metallized film capacitor 200 of the present embodiment has a pair of band-shaped metallized films 10 stacked, and a protruding part in which the metal film 12 is exposed by alternately protruding one side and the other side in the width direction to the opposite side. 13 is different from the metallized film capacitor 100 described in the above embodiment in that it is wound so as to form 13. Since the other points of the metallized film capacitor 200 of this embodiment are the same as those of the metallized film capacitor 100 of the above-described embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

  The metallized film capacitor 200 of this embodiment includes a pair of band-shaped metallized films 10. Each metallized film 10 includes a film member exposed portion 14 in which a metal film 12 is formed on the surface and the film member 11 is exposed at one end in the width direction. One metallized film 10 has the other metallized film 10 and the other metallized film 10 so that one side S1 in the width direction opposite to the film member exposed part 14 protrudes from the film member exposed part 14 of the other metallized film 10. It is piled up. Further, the other metallized film 10 has one metallized film such that the other side S2 in the width direction opposite to the film member exposed part 14 protrudes from the film member exposed part 14 of the one metallized film 10. 10 and superimposed.

  In this state, by winding a pair of band-shaped metallized films 10, one side S1 in the width direction of one metallized film 10 and the other side S2 of the other metallized film 10 are alternately opposite to each other. A protruding portion 13 is formed by protruding the metal film 12. Thereafter, similarly to the metallized film capacitor 100 of the above-described embodiment, the metal needle 30 is passed through the protruding portion 13, and the pair of metallicons 20 is formed by maintaining the gap between the protruding portions 13 by the metal needle 30.

  Similar to the metallized film capacitor 100 described in the previous embodiment, the metalized film capacitor 200 of the present embodiment includes a metal needle 30 that penetrates the protruding portion 13 and maintains the gap between the protruding portions 13. Yes. Therefore, according to the metallized film capacitor 200 of the present embodiment, like the metallized film capacitor 100 described in the above-described embodiment, the metallicon 20 is interposed between the metallized films 10 when the metallized film capacitor 200 is manufactured. It is possible to make the material easy to enter, and to make electrical contact between the metallicon 20 and the metal film 12 of the metallized film 10 more reliable.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

DESCRIPTION OF SYMBOLS 10 Metallized film 11 Film member 12 Metal film 13 Protrusion part 20 Metallicon 30 Metal needle 100 Metallized film capacitor 200 Metallized film capacitor S1 One side S2 in the width direction S2 The other side in the width direction

Claims (1)

A metallized film capacitor comprising: a metallized film having a film member and a metal film formed on the surface of the film member; and a pair of metallicons formed by metal spraying,
The metallized film is laminated or wound so as to form a protruding portion in which the metal film is exposed by alternately protruding one side and the other side in the width direction to the opposite side,
Of the pair of metallicons, one is connected to the metal film exposed at the protruding portion on the one side, and the other is connected to the metal film exposed at the protruding portion on the other side,
A metallized film capacitor comprising a metal needle that penetrates the protrusion and maintains a gap between the protrusions.

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