CN210378765U

CN210378765U - Special metallized film for dipping capacitor

Info

Publication number: CN210378765U
Application number: CN201921283022.8U
Authority: CN
Inventors: 宋仁祥
Original assignee: Anhui Ningguo Haiwei Electronics Co ltd
Current assignee: Song Renxiang
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-04-21
Anticipated expiration: 2029-08-08

Abstract

The utility model relates to a special metallized film of flooding formula condenser, including insulating base film, insulating base film's surface is provided with the metallic coating, and the surface of metallic coating is provided with a plurality of insulating parting beads along insulating base film length direction, is provided with the stock solution district between the adjacent insulating parting bead, and the stock solution district is provided with the through-hole that runs through metallic coating and insulating base film, and the surface of metallic coating still is provided with the cover and establishes the outside grommet in through-hole, and the outside of grommet is provided with many insulating strips. The special metallized film for the impregnated capacitor is simple in structure and convenient to manufacture, and after the impregnated capacitor is assembled, the impregnant is easy to adhere to the surface of the metal coating to form an insulating oil film, so that the breakdown risk of the capacitor core is effectively reduced, the improvement of the heat dissipation performance of the capacitor core is facilitated, and the implementation effect is good.

Description

Special metallized film for dipping capacitor

Technical Field

The utility model relates to a special metallized film of impregnated capacitor belongs to condenser technical field.

Background

The immersion type capacitor is characterized in that the capacitor core is immersed by adopting an impregnant, and the impregnant plays roles in insulation protection and heat dissipation.

Currently, the impregnant used for metallized film capacitors is generally vegetable oil such as castor oil and salad oil, or mineral oil such as methyl silicone oil, benzyl silicone oil and transformer oil. The capacitor core is made by winding a metalized film, and a wound winding core is difficult to permeate due to the fact that gaps among layers are very small, so that only one insulating film is isolated between adjacent metal coatings, and the risk of breakdown exists; especially, the capacitor core with large volume is closer to the inner layer of the capacitor core, and the impregnant cannot be impregnated into the capacitor core, so that the insulation strength and the heat dissipation effect cannot be guaranteed, and the capacitor has higher risk of being broken down.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists provides the special metallized film of impregnated capacitor, and concrete technical scheme is as follows:

the special metalized film for the impregnated capacitor comprises an insulating base film, wherein a metal coating is arranged on the surface of the insulating base film, a plurality of insulating parting beads are arranged on the surface of the metal coating along the length direction of the insulating base film, a liquid storage area is arranged between every two adjacent insulating parting beads, a through hole penetrating through the metal coating and the insulating base film is formed in the liquid storage area, an insulating ring sleeved outside the through hole is further arranged on the surface of the metal coating, the insulating ring and the through hole are coaxially arranged, and the insulating ring and the metal coating are connected into a whole; the outside of insulating collar is provided with many insulating strips, the insulating strip is radial symmetric distribution in stock solution district, the one end and the insulating collar of insulating strip are connected as an organic whole, the insulating strip is connected as an organic whole with metallic coating.

According to the further optimization of the technical scheme, the insulating division bars are formed by a plurality of insulating coatings which are arranged into long strips, the insulating coatings are rectangular, and intervals are arranged between every two adjacent insulating coatings.

According to the further optimization of the technical scheme, the length direction of the insulating coating is perpendicular to the length direction of the insulating base film.

According to the further optimization of the technical scheme, the distance between the adjacent insulating coatings is x, and x is more than or equal to 2mm and less than or equal to 6 mm.

According to the technical scheme, the insulating ring is of a circular ring-shaped structure, the through hole is a circular hole, and the inner diameter of the insulating ring is equal to the diameter of the through hole.

According to the further optimization of the technical scheme, the diameter of the through hole is smaller than or equal to 9 mm.

According to the further optimization of the technical scheme, the thickness of the insulating coating is equal to that of the insulating strip, and the thickness of the insulating strip is equal to that of the insulating ring.

Special metallized film of impregnated capacitor simple structure, the preparation is convenient, and it is after assembling into impregnated capacitor, and the impregnant easily adheres to the surface formation insulating oil film on metallic coating to effectively reduce the puncture risk of condenser core, still do benefit to the thermal diffusivity that improves condenser core, implement effectually.

Drawings

Fig. 1 is a schematic structural diagram of a metallized film specially used for an immersion capacitor according to the present invention;

fig. 2 is a schematic cross-sectional view of a special metallized film for an immersion capacitor according to the present invention;

fig. 3 is a schematic view of the distribution of the insulating coating according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, the special metalized film for an immersion capacitor includes an insulating base film 10, a metal plating layer 20 is disposed on a surface of the insulating base film 10, a plurality of strip-shaped insulating spacers 30 are disposed on a surface of the metal plating layer 20 along a length direction of the insulating base film 10, the adjacent insulating spacers 30 are disposed at equal intervals, a liquid storage region is disposed between the adjacent insulating spacers 30, the liquid storage region is provided with a through hole 40 penetrating through the metal plating layer 20 and the insulating base film 10, an insulating ring 50 sleeved outside the through hole 40 is further disposed on a surface of the metal plating layer 20, the insulating ring 50 is coaxial with the through hole 40, and the insulating ring 50 is integrally connected with the metal plating layer 20; the outside of insulating ring 50 is provided with many insulating strips 60, insulating strip 60 is radial symmetric distribution in stock solution district, the one end and the insulating ring 50 of insulating strip 60 are connected as an organic whole, insulating strip 60 is connected as an organic whole with metallic coating 20.

The insulating base film 10 may be one of a polyethylene film, a polypropylene film, and a polycarbonate film. The metal coating 20 is an aluminum coating or a zinc coating, and is made into the aluminum coating or the zinc coating by a vacuum coating technology. The insulating ring 50 and the insulating strip 60 are made by spraying plastics by using polyethylene ester or polypropylene or polycarbonate as raw materials. The insulating division bar 30 can be designed into a complete strip shape, and is also made by using polyethylene ester, polypropylene or polycarbonate as a raw material and performing plastic spraying.

In order to further improve the fluidity of the impregnant after infiltration; the insulating division bar 30 is composed of a plurality of insulating coatings 31 arranged in a long strip shape, the insulating coatings 31 are rectangular, and a gap is arranged between every two adjacent insulating coatings 31. The insulating coating 31 can be made by spraying plastics with polyethylene ester, polypropylene or polycarbonate as raw materials. The length direction of the insulating coating 31 is perpendicular to the length direction of the insulating base film 10. The distance between the adjacent insulating coatings 31 is x, and x is more than or equal to 2mm and less than or equal to 6 mm. The distance between adjacent insulating coatings 31 cannot be too large, otherwise the blocking effect of the insulating coatings is influenced; the spacing between adjacent insulating coatings 31 must not be too large, which could affect the flow of the impregnant.

Further, the insulating ring 50 is a circular ring structure, the through hole 40 is a circular hole, and the inner diameter of the insulating ring 50 is equal to the diameter of the through hole 40. The diameter of the through hole 40 is less than or equal to 9 mm.

Further, the thickness of the insulating coating 31 is equal to that of the insulating strip 60, and the thickness of the insulating strip 60 is equal to that of the insulating ring 50. This makes the immersion capacitor specific metallized film advantageous for controlling the gap between each layer after winding.

The insulation ring 50 is equivalent to a thickening layer arranged at the through hole 40, and the insulation strip 60 connected with the insulation ring 50 makes the insulation strip 60 not easy to fall off. The insulating strips 60 are radially and symmetrically distributed in the liquid storage area, and the liquid storage area is separated by the insulating partition strips 30, so that after the special metallized film for the immersion type capacitor is wound into a capacitor core, the impregnant is easily attached to the surface of the metal coating layer 20, and a layer of insulating oil film is formed on the surface of the metal coating layer 20; the heat dissipation of the capacitor core can also be significantly increased if the impregnating agent is a transformer oil with good heat dissipation properties. The insulating strips 60 are radially symmetrically distributed in the reservoir region, which facilitates impregnation of the impregnant into the interior of the condenser core. The insulating division bar 30 is composed of a plurality of insulating coatings 31 arranged in a long strip shape, so that the impregnant between two adjacent liquid storage areas can circulate, and the circulation effect is ensured.

In the above embodiment, the dipping experiment is performed on the special metallized film for the dipping capacitor, the special metallized film for the dipping capacitor of the utility model is cut into samples of 300mm × 200mm, the existing traditional metallized film is also cut into reference products of 300mm × 200mm, the samples and the reference products are weighed firstly, then the samples and the reference products are respectively dipped into the dipping tanks, 50g of dipping solution is also put into each dipping tank for 10 minutes; the samples and controls were then hung vertically to drain, reweighed after 10 minutes, then reweighed for 30 minutes, and finally drained for 60 minutes. After the dipping experiment, the residual quantity of the surface impregnant is not less than 33 percent even after the sample is drained for 60 minutes; and after the control product is drained for 30 minutes, the residual quantity of the surface impregnant of the control product is not more than 6 percent. Therefore, after the special metallized film for the immersion capacitor is wound into a capacitor core and finally assembled into the immersion capacitor, the impregnant is easy to adhere to the surface of the metal plating layer 20 to form an insulating oil film, so that the breakdown risk of the capacitor core is effectively reduced, the heat dissipation performance of the capacitor core is favorably improved, and the implementation effect is good.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Special metallized film of impregnated capacitor, including insulating base film (10), the surface of insulating base film (10) is provided with metal coating (20), its characterized in that: the surface of the metal coating (20) is provided with a plurality of insulating parting beads (30) along the length direction of the insulating base film (10), a liquid storage area is arranged between every two adjacent insulating parting beads (30), the liquid storage area is provided with a through hole (40) penetrating through the metal coating (20) and the insulating base film (10), the surface of the metal coating (20) is further provided with an insulating ring (50) sleeved outside the through hole (40), the insulating ring (50) and the through hole (40) are coaxially arranged, and the insulating ring (50) and the metal coating (20) are connected into a whole; the outside of insulating collar (50) is provided with many insulated strips (60), insulated strip (60) are radial symmetric distribution in stock solution district, the one end and the insulating collar (50) of insulated strip (60) are connected as an organic wholely, insulated strip (60) are connected as an organic wholely with metallic coating (20).

2. The metallized film for use in an impregnated capacitor as claimed in claim 1, wherein: the insulating division bars (30) are formed by a plurality of insulating coatings (31) which are arranged into long strips, the insulating coatings (31) are rectangular, and intervals are arranged between every two adjacent insulating coatings (31).

3. The metallized film for use in an impregnated capacitor as claimed in claim 2, wherein: the length direction of the insulating coating (31) is perpendicular to the length direction of the insulating base film (10).

4. The metallized film for use in an impregnated capacitor as claimed in claim 3, wherein: the distance between the adjacent insulating coatings (31) is x, and x is more than or equal to 2mm and less than or equal to 6 mm.

5. The metallized film for use in an impregnated capacitor as claimed in claim 1, wherein: the insulating ring (50) is of a circular ring-shaped structure, the through hole (40) is a circular hole, and the inner diameter of the insulating ring (50) is equal to the diameter of the through hole (40).

6. The metallized film for use in an impregnated capacitor as claimed in claim 5, wherein: the diameter of the through hole (40) is less than or equal to 9 mm.

7. The metallized film for use in an impregnated capacitor as claimed in claim 2, wherein: the thickness of the insulating coating (31) is equal to that of the insulating strip (60), and the thickness of the insulating strip (60) is equal to that of the insulating ring (50).