CN216597293U

CN216597293U - Capacitor and metal shell insulation structure thereof

Info

Publication number: CN216597293U
Application number: CN202123073921.5U
Authority: CN
Inventors: 郭乐强; 邱圣忠; 罗荣海
Original assignee: XIAMEN FARATRONIC CO Ltd
Current assignee: XIAMEN FARATRONIC CO Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-05-24
Anticipated expiration: 2031-12-08

Abstract

The utility model discloses a capacitor and a metal shell insulation structure thereof, wherein the metal shell insulation structure comprises a metal shell and an insulation piece, and the metal shell is provided with an accommodating cavity; the insulating part is provided with the fretwork holding chamber that holds condenser core group unit, the insulating part sets up metal casing holds the intracavity. The utility model can meet the requirements of rapid assembly in the using process of a product, improves the flowing efficiency of resin, and can also meet the insulation requirements among the capacitor core, the busbar and the metal shell.

Description

Capacitor and metal shell insulation structure thereof

Technical Field

The utility model relates to the technical field of capacitors, in particular to a capacitor and a metal shell insulation structure thereof.

Background

In the related technology, the film capacitor mainly comprises a capacitor core, a bus bar, filling resin and a shell, wherein the bus bar and the capacitor core are welded and then are filled into the shell, and the shell is filled with the resin; with the wide application of the film capacitor to new energy vehicles such as electric vehicles, hybrid vehicles and the like, higher requirements are put forward on the power density and the assembly strength of the film capacitor; in order to meet the requirements, the conventional design that the plastic shell is switched into the metal shell is an effective countermeasure; however, the component assembly inside the film capacitor has high insulation requirements, and the application of the metal shell also provides challenges for the insulation design of the film capacitor.

The internal insulation design of a film capacitor of the existing metal shell generally adopts an insulation film to coat a capacitor core and a busbar, and then the capacitor core and the busbar are placed into the metal shell to be filled with resin; however, in the design, the insulating film is adopted to coat the core and the busbar, so that the operation action is complex and the assembly efficiency is low; and since the thermal conductivity of the insulating film is lower than that of the resin, the thermal conductivity of the thin film capacitor is reduced; moreover, the insulating film covers the core and the busbar, and simultaneously, the flowing path of the resin is easy to block, and the resin flows slowly, so that the production efficiency of the film capacitor is reduced; in addition, when the insulating film covers the core and the busbar, the flowing path of resin is easily blocked, the resin is not completely filled, and the thickness of a resin protective layer is insufficient, so that the moisture resistance of the film capacitor is reduced, the bonding area of the resin and the metal shell is insufficient, when the film capacitor is used for a long time, the core and the busbar have the risk of being separated from the metal shell, more air exists in the resin, the heat conductivity of the air is lower than that of the resin, and the heat conductivity of the film capacitor is reduced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, one object of the present invention is to provide an insulation structure for a metal shell, which can meet the requirements of fast assembly during the use of the product, increase the resin flow efficiency, and meet the insulation requirements between the capacitor core, the busbar and the metal shell.

A second object of the present invention is to provide a capacitor.

In order to achieve the above object, a first aspect of the present invention provides a metal shell insulation structure of a capacitor, including:

the metal shell is provided with an accommodating cavity;

the insulation piece is provided with a hollow accommodating cavity for accommodating the capacitor core assembly unit, and the insulation piece is arranged in the accommodating cavity of the metal shell.

According to the metal shell insulation structure of the capacitor, the insulation piece is provided with the hollow accommodating cavity for accommodating the capacitor core group unit, and the insulation piece is arranged in the accommodating cavity of the metal shell; therefore, the insulating film does not need to be bent and formed in advance, and the assembly process is simple and efficient; due to the design of the hollow insulating part, the resin can not be separated in a large area, the heat conducting performance of the capacitor is low in influence, the flow of the resin can not be influenced, the production efficiency of the capacitor manufacturing process can not be reduced, the flow of the resin can not be blocked, and the resin can be filled more fully.

In addition, the metal shell insulation structure of the capacitor provided by the above embodiment of the present invention may further have the following additional technical features:

optionally, the insulating member includes a plurality of U-shaped receiving members and a U-shaped fixing member connected to each other by a connecting member.

Optionally, one end of each of the plurality of U-shaped accommodating members is connected to the bottom of the U-shaped fixing member, and a hollow accommodating cavity is formed by the plurality of U-shaped accommodating members and the U-shaped fixing member.

Optionally, the insulating member is fixed in the accommodating cavity of the metal shell by the U-shaped fixing member.

Optionally, a plurality of through holes are formed around the insulating member to form a hollow accommodating cavity.

Optionally, the capacitor core assembly unit comprises a capacitor core and a busbar assembly, and the busbar assembly is welded on the capacitor core.

Optionally, a resin is filled between the metal shell and the capacitor core assembly unit, and the resin penetrates through the insulator.

Optionally, the insulating member is an insulating plastic member.

In order to achieve the above object, a second embodiment of the present invention provides a capacitor, which includes the above metal-can insulating structure.

The capacitor comprises a metal shell insulation structure, wherein the insulation piece is provided with a hollow accommodating cavity for accommodating the capacitor core group unit, and the insulation piece is arranged in the accommodating cavity of the metal shell; therefore, the insulating film does not need to be bent and formed in advance, and the assembly process is simple and efficient; due to the design of the hollow insulating part, the resin can not be separated in a large area, the heat conducting performance of the capacitor is influenced less, the flowing of the resin can not be influenced, the production efficiency of the capacitor manufacturing process can not be reduced, the flowing of the resin can not be blocked, and the resin can be filled more fully.

Drawings

FIG. 1 is a schematic structural diagram of a capacitor according to an embodiment of the present invention;

FIG. 2 is a schematic front view of a capacitor according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line G-G of FIG. 2;

FIG. 4 is an exploded view of a capacitor according to one embodiment of the present invention;

fig. 5 is an exploded view of a capacitor according to an embodiment of the utility model.

Description of the reference symbols

Metal shell 1 accommodating cavity 11

Insulating member 2 accommodating chamber 21

U-shaped accommodating piece 22 connecting piece 23

Through hole 25 of U-shaped fixing piece 24

Capacitor core group unit 3 capacitor core 31 bus bar assembly 32

And (4) a resin.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.

As shown in fig. 1 to 4, a metal shell insulation structure of a capacitor according to an embodiment of the present invention includes a metal shell 1 and an insulator 2.

The metal shell 1 is provided with a containing cavity 11; the insulator 2 is provided with a hollow accommodating cavity 21 for accommodating the capacitor core assembly unit 3, and the insulator 2 is arranged in the accommodating cavity 11 of the metal shell 1.

That is, the metal case 1 and the capacitor core group unit 3 have a sufficient insulation distance by being provided with the hollowed-out insulator 2 to be isolated between the metal case 1 and the capacitor core group unit 3.

As an embodiment, the insulating member 2 includes a plurality of U-shaped receiving members 22 and a U-shaped fixing member 24 connected to each other by a connecting member 23; one end of each of the plurality of U-shaped receiving members 22 is connected to the bottom of the U-shaped fixing member 24, and the hollow receiving cavity 21 is formed by the plurality of U-shaped receiving members 22 and the U-shaped fixing member 24.

As shown in fig. 4, the number of the U-shaped accommodating parts 22 is three, the three U-shaped accommodating parts 22 are connected in series through the connecting part 23 to form a cavity of the hollow accommodating cavity 21, and the U-shaped fixing part 24 is disposed above the U-shaped accommodating part 22 and is inverted to form a cavity edge of the hollow accommodating cavity 21.

As an embodiment, the insulating member 2 is fixed in the accommodating cavity 11 of the metal shell 1 by a U-shaped fixing member 24.

It should be noted that, a buckle may be arranged at an end of the U-shaped fixing member 24, and the buckle is matched with a clamping groove on the inner side of the accommodating cavity 11 of the metal shell 1, so as to fix the U-shaped fixing member 24 in the accommodating cavity 11 of the metal shell 1; the present invention is not limited to a specific fixing structure.

As another embodiment, as shown in fig. 5, the insulating member 2 is provided with a plurality of through holes 25 at the periphery thereof to form a hollow accommodating cavity.

As an embodiment, the plurality of through holes 25 may be configured as circular through holes and evenly distributed around the insulating member 2.

As an embodiment, the capacitor core assembly unit 3 comprises a capacitor core 31 and a busbar assembly 32, wherein the busbar assembly 32 is welded on the capacitor core 31; the resin 4 is filled between the metal shell 1 and the capacitor core assembly unit 3, and the resin 4 penetrates the insulator 2.

The hollow insulating part is designed, so that the resin can not be isolated in a large area, and the influence on the heat-conducting property of the capacitor is low; the flowing of resin is not influenced, and the production efficiency of the capacitor manufacturing process is not reduced; the flow of the resin is not blocked and the resin can be filled more sufficiently.

As an embodiment, the insulating member 2 is an insulating plastic member.

It should be noted that the insulating plastic part may be formed by general engineering plastics, such as PP, PPs, PC, PBT, PET, PA, etc., by plastic suction molding, injection molding, extrusion molding or machining.

In summary, according to the metal shell insulation structure of the capacitor in the embodiment of the utility model, the insulation member is provided with the hollow accommodating cavity for accommodating the capacitor core assembly unit, and the insulation member is arranged in the accommodating cavity of the metal shell; therefore, the insulating film does not need to be bent and formed in advance, and the assembly process is simple and efficient; due to the design of the hollow insulating part, the resin can not be separated in a large area, the heat conducting performance of the capacitor is low in influence, the flow of the resin can not be influenced, the production efficiency of the capacitor manufacturing process can not be reduced, the flow of the resin can not be blocked, and the resin can be filled more fully.

As shown in fig. 1 to 4, a second embodiment of the present invention provides a capacitor, including the above metal housing insulation structure, where the metal housing insulation structure includes a metal housing 1 and an insulator 2, and the metal housing 1 is provided with a receiving cavity 11; the insulator 2 is provided with a hollow accommodating cavity 21 for accommodating the capacitor core assembly unit 3, and the insulator 2 is arranged in the accommodating cavity 11 of the metal shell 1.

The capacitor comprises a metal shell insulation structure, wherein the insulation piece is provided with a hollow accommodating cavity for accommodating the capacitor core group unit, and the insulation piece is arranged in the accommodating cavity of the metal shell; therefore, the insulating film does not need to be bent and formed in advance, and the assembly process is simple and efficient; due to the design of the hollow insulating part, the resin can not be separated in a large area, the heat conducting performance of the capacitor is low in influence, the flow of the resin can not be influenced, the production efficiency of the capacitor manufacturing process can not be reduced, the flow of the resin can not be blocked, and the resin can be filled more fully.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only 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 considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A metal case insulation structure of a capacitor, comprising:

the metal shell is provided with an accommodating cavity;

2. The metal can insulation structure of capacitor as claimed in claim 1, wherein said insulation member comprises a plurality of U-shaped receiving members and a U-shaped fixing member connected to each other by a connecting member.

3. The insulation structure for metal case of capacitor as claimed in claim 2, wherein one end of each of said plurality of U-shaped receiving members is connected to the bottom of said U-shaped fixing member, and a hollow receiving cavity is formed by said plurality of U-shaped receiving members and said U-shaped fixing member.

4. The metal can insulation structure of claim 3, wherein said insulation member is fixed in a receiving cavity of said metal can by said U-shaped fixing member.

5. The metal can insulation structure of claim 1, wherein the insulation member has a plurality of through holes formed around it to form a hollow receiving cavity.

6. The metal case insulation structure of capacitor as claimed in claim 1, wherein said capacitor core assembly unit comprises a capacitor core and a busbar assembly welded on said capacitor core.

7. The metal case insulation structure of a capacitor as set forth in claim 1, wherein a resin is filled between said metal case and said capacitor core assembly unit, and said resin penetrates said insulation member.

8. The metal can insulation structure of a capacitor as claimed in claim 1, wherein said insulation member is an insulation plastic member.

9. A capacitor comprising a metal can insulation structure according to any one of claims 1 to 8.