CN213601764U - Capacitor with a capacitor element - Google Patents

Abstract

The present application relates to a capacitor comprising a housing, a terminal, and a core assembly; the terminal is fixedly arranged at the top of the shell, the terminal is provided with an extending end extending into the cavity of the shell, the core component is fixedly arranged in the cavity of the shell, and the core component is electrically connected with the extending end of the terminal; and a potting material is filled in the cavity of the shell in a sealing manner, and the potting material is a dry potting material. The dry sealing material solves the problems of oil leakage and oil fire after the oil type sealing material is used for a long time.

Description

Capacitor with a capacitor element

Technical Field

The present disclosure relates to the field of electronic devices, and more particularly, to a capacitor.

Background

In the 60 s of the 20 th century, beginning with the built and use of a new trunk railway in Japan, commercial operation high-speed railways begin to develop globally, China has developed from an early 120 km/h train to 160 km and developed to CR200, CRH380, CRH400 and faster trains to date, film capacitors for trains in early years are mostly imported abroad, brand names such as Japan, VISHY, EPCOS and the like are mainly limited by the development of high polymer materials, the interior of the capacitors are filled and sealed by oil type filling and sealing materials, and particularly, the alternating current filter film capacitors are filled and sealed by raw materials such as silicone oil, rapeseed oil, castor oil and the like.

After the oil type alternating current filter film capacitor is used for a long time, the risk of oil leakage exists, the internal oil is flammable, the requirements of E5545-2 smoke and fire are not met, and the oil type alternating current filter film capacitor is not suitable for being applied to the rail transit industry.

Disclosure of Invention

In view of the above, the present disclosure provides a capacitor that solves the problems of oil leakage and oil fire after a long-term use of an oil type sealing material by using a dry type sealing material.

According to an aspect of the present disclosure, there is provided a capacitor including a case, a terminal, and a core assembly;

the terminal is fixedly arranged at the top of the shell, the terminal is provided with an extending end extending into the cavity of the shell, the core component is fixedly arranged in the cavity of the shell, and the core component is electrically connected with the extending end of the terminal;

and a potting material is filled in the cavity of the shell in a sealing manner, and the potting material is a dry potting material.

In one possible implementation manner, the core assembly comprises a plurality of core monomers, and the plurality of core monomers are distributed in an array of M rows and N columns;

wherein M is more than or equal to 2, and N is more than or equal to 2;

the electrodes of the core monomers in each row are electrically connected in sequence;

in one row of the core single bodies corresponding to the negative terminal and one row of the core single bodies corresponding to the ground terminal, the electrodes of the core single bodies in every other row are electrically connected.

In one possible implementation, the electrical connection between the electrodes of the core cells is made using copper tape.

In a possible implementation mode, the top of each row of the core monomers is provided with a busbar, the number of the terminals is matched with that of the busbars, and the terminals are electrically connected with the busbars in a one-to-one correspondence manner.

In one possible implementation, when N ═ 3;

the three rows of the core monomers comprise a first core row, a second core row and a third core row which are sequentially arranged, the bus comprises a first bus, a second bus and a third bus, and the terminals comprise a positive terminal, a ground terminal and a negative terminal;

the first busbar is arranged at the top of the first core column, the first busbar is electrically connected with the first core column, the second busbar is arranged at the top of the second core column, the third busbar is arranged at the top of the third core column, and the third busbar is electrically connected with the third core column;

the top of the first busbar is provided with a first connecting piece, the positive terminal is fixed on one side of the first connecting piece, which is not connected with the first busbar, and the first busbar is electrically connected with the positive terminal;

the top of the second busbar is provided with a second connecting piece, the grounding terminal is fixed on the side of the second connecting piece which is not connected with the second busbar, and the second busbar is electrically connected with the grounding terminal;

the top of the third busbar is provided with a third connecting piece, the negative terminal is fixed on the side, which is not connected with the third busbar, of the third connecting piece, and the third busbar is electrically connected with the negative terminal.

In one possible implementation, the first connecting member, the second connecting member and the third connecting member are screws.

In one possible implementation manner, the busbars are tinned busbars.

In one possible implementation, the core assembly is surrounded by an insulating layer.

In one possible implementation, the housing includes a bottom box and an end cap;

the bottom box body is provided with a cavity, and the top of the bottom box body is provided with an opening;

the core assembly is arranged in the cavity of the bottom box body, the structure of the end cover is matched with that of the opening at the top of the bottom box body, and the end cover is fixed at the opening of the bottom box body;

the terminal is arranged at the top of the end cover, and the extending end of the terminal penetrates through the end cover and extends into the cavity of the bottom box body.

In a possible implementation manner, the device further comprises a pressure relief valve, wherein the pressure relief valve is fixedly installed at the top of the shell and is communicated with the cavity of the shell.

The capacitor of the embodiment of the application installs the core assembly inside the cavity of the shell, fixedly installs the terminal at the top of the shell, connects the extending end of the terminal with the core assembly, and completes the installation of the dry potting material inside the cavity of the shell. The potting material of the inside embedment of this application embodiment condenser is dry-type potting material, and dry-type potting material wraps up the core subassembly inside the cavity of shell completely. Because dry-type encapsulating material compares with original oily formula encapsulating material and has better coefficient of heat conductivity, coefficient of heat dissipation and low expansion coefficient to make the oil leak risk that exists after the long-term use can not appear in this application embodiment condenser, also solved the risk that the oil of trouble back oily formula encapsulating material catches fire, dry-type encapsulating material satisfies the firework requirement simultaneously. To sum up, the dry sealing material is used in the embodiment of the application, so that the phenomena of oil leakage and oil fire after the oil type sealing material is used for a long time are solved.

Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

FIG. 1 shows a partial cross-sectional view of a front view of a capacitor of an embodiment of the present application;

FIG. 2 shows a partial cross-sectional view of a left side view of a capacitor of an embodiment of the present application;

FIG. 3 shows a partial cross-sectional view of a top view of a capacitor of an embodiment of the present application;

fig. 4 shows a cross-sectional view of a back view of a capacitor of an embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention or for simplicity in description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the 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 limited otherwise.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.

Fig. 1 shows a partial cross-sectional view of a front view of a capacitor of an embodiment of the present application. Fig. 2 illustrates a partial cross-sectional view of a left side view of a capacitor of an embodiment of the present application. Fig. 3 illustrates a partial cross-sectional view of a top view of a capacitor of an embodiment of the present application. Fig. 4 illustrates a cross-sectional view of a back view of a capacitor of an embodiment of the present application. As shown in fig. 1, 2, 3 or 4, the capacitor includes: the terminal assembly comprises a shell 100, a terminal 200 and a core assembly 300, wherein the terminal 200 is fixedly installed on the top of the shell 100, the terminal 200 is provided with an extending end extending into a cavity of the shell 100, the core assembly 300 is fixedly installed in the cavity of the shell 100, and the core assembly 300 is electrically connected with the extending end of the terminal 200. The cavity of the housing 100 is filled with a dry potting material.

In the capacitor of the embodiment of the present application, the core assembly 300 is installed inside the cavity of the housing 100, the terminal 200 is fixedly installed on the top of the housing 100, the extending end of the terminal 200 is connected to the core assembly 300, and the dry potting material is filled inside the cavity of the housing 100, so that the installation is completed. The potting material of the inside potting of this application embodiment condenser is dry potting material, and dry potting material wraps up the core subassembly 300 inside the cavity of shell 100 completely. Because dry-type encapsulating material compares with original oily formula encapsulating material and has better coefficient of heat conductivity, coefficient of heat dissipation and low expansion coefficient to make the oil leak risk that exists after the long-term use can not appear in this application embodiment condenser, also solved the risk that the oil of trouble back oily formula encapsulating material catches fire, dry-type encapsulating material satisfies the firework requirement simultaneously. To sum up, the dry sealing material is used in the embodiment of the application, so that the phenomena of oil leakage and oil fire after the oil type sealing material is used for a long time are solved.

In one possible implementation, the core assembly 300 includes a plurality of core monomers distributed in a rectangular array of M rows and N columns, where M is less than or equal to 2 and N is less than or equal to 2. The electrodes of the core monomers in each row are arranged in series, and the electrodes of the core monomers spaced by one line are arranged in series in one row of the core monomers corresponding to the negative terminal 230 and one row of the core monomers corresponding to the ground terminal 220. Here, it should be noted that the core unit is composed of a core rod and a material roll, and the core unit is formed by winding the material on the core rod.

In one possible implementation, the electrical connections between the electrodes of the core cell 300 are made using copper tape.

Further, in one possible implementation, the electrodes of each column of core cells are connected in series by vertical copper strips 400, and the electrodes of every alternate column of core cells in one column of core cells corresponding to the negative terminal 230 and one column of core cells corresponding to the ground terminal 220 are connected in series by horizontal copper strips 500.

In a possible implementation manner, a busbar is arranged at the top of each row of core monomers, the number of the terminals 200 is matched with that of the busbars, and the terminals 200 are electrically connected with the busbars in a one-to-one correspondence manner.

Further, in a possible implementation manner, when the number N of the columns is 3, the capacitor in the embodiment of the present application is provided with three rows, which are a first core column, a second core column and a third core column respectively, the bus bar includes a first bus bar 600, a second bus bar 700 and a third bus bar, and the terminal 200 includes a positive terminal 210, a ground terminal 220 and a negative terminal 230. The first busbar 600 is arranged at the top of the first core row, the first busbar 600 is electrically connected with the first core row, the second busbar 700 is arranged at the top of the second core row, the third busbar is arranged at the top of the third core row, and the third busbar is electrically connected with the third core row. The top of the first busbar 600 is provided with a first connecting piece 800, the positive terminal 210 is fixed on one side of the first connecting piece 800 which is not connected with the first busbar 600, and the first busbar 600 is electrically connected with the positive terminal 210. The top of the second busbar 700 is provided with a second connector 900, the ground terminal 220 is fixed on the side of the second connector 900 not connected with the second busbar 700, and the second busbar 700 is electrically connected with the ground terminal 220. The top of the third busbar is provided with a third connecting piece 1010, the negative terminal 230 is fixed on the side of the third connecting piece 1010 which is not connected with the third busbar, and the third busbar is electrically connected with the negative terminal 230.

Here, it should be noted that when the number of M rows is 4 and the number of N columns is 3, the vertical copper strips 400 include a first copper strip, a second copper strip, a third copper strip, a fourth copper strip, a fifth copper strip, and a sixth copper strip.

The first copper strip is welded at the front end of the first core row, the front electrodes of the four core monomers in the first core row are connected in series by the first copper strip, the rear electrodes of the four core monomers in the second core row are connected in series by the second copper strip which is welded at the rear end of the second core row. The third copper strip is welded at the front end of the second core row, the front end electrodes of the four core monomers in the second core row are connected in series by the third copper strip, the rear end electrodes of the four core monomers in the second core row are connected in series by the fourth copper strip, and the rear end electrodes of the four core monomers in the second core row are connected in series by the fourth copper strip. The fifth copper strip is welded at the front end of the third core row, the fifth copper strip connects the front electrodes of the four core monomers in the third core row in series, the sixth copper strip is welded at the rear end of the third core row, and the sixth copper strip connects the rear electrodes of the four core monomers in the third core row in series.

The horizontal copper strip 500 comprises a seventh copper strip, an eighth copper strip, a ninth copper strip and a tenth copper strip, wherein two ends of the seventh copper strip are respectively welded at the front ends of the core monomers in the second row of the second core row and the front ends of the core monomers in the second row of the third core row. And two ends of the eighth copper strip are respectively welded at the rear ends of the second row of core monomers of the second core row and the rear ends of the second row of core monomers of the third core row, so that the core monomers of the second row of the second core row are connected with the core monomers of the second row of the third core row in series. And the seventh copper strip is arranged on the outer sides of the third copper strip and the fifth copper strip, and the eighth copper strip is arranged on the outer sides of the fourth copper strip and the sixth copper strip. Here, it should be noted that the core elements of the second row of the second core row and the core elements of the second row of the third core row are each in the second row from the top.

And a ninth copper strip is welded between the front ends of the core monomers in the fourth row of the second core column and the front ends of the core monomers in the fourth row of the third core column, and a tenth copper strip is welded between the rear ends of the core monomers in the fourth row of the second core column and the rear ends of the core monomers in the fourth row of the third core column. So that the core elements of the fourth row of the second core row and the core elements of the fourth row of the third core row are arranged in series.

Here, it should be noted that the first and second copper strips extend out of the top of the first core column, the third and fourth copper strips extend out of the top of the second core column, and the fifth and sixth copper strips extend out of the top of the third core column.

The first busbar 600 arranged at the top of the first core row is connected with the top of the second copper strip, namely, the first busbar 600 is electrically connected with the first core row through the second copper strip, the third busbar arranged at the top of the third core row is connected with the top of the fifth copper strip, namely, the third busbar is electrically connected with the third core row through the fifth copper strip. The top of the second core row is provided with a second busbar 700, and the second busbar 700 is connected with the top of the first copper strip and the top of the sixth copper strip.

Here, it should be noted that the top of the second copper strip may be bent towards the center of the first core column, whereby the bending of the second copper strip is arranged on top of the first busbar 600. The arrangement of the first copper strip, the third copper strip, the fourth copper strip, the fifth copper strip and the sixth copper strip can be similar to that of the second copper strip.

Further, in a possible implementation, the first connector 800, the second connector 900 and the third connector 1010 are screws.

Further, in one possible implementation, the first connector 800, the second connector 900, and the third connector 1010 may each be round head cross brass screws.

In one possible implementation manner, the first busbar 600, the second busbar 700, and the third busbar are tinned busbars.

In one possible implementation, the core assembly 300 is surrounded by an insulating layer. Here, it should be noted that insulating paper is disposed between the core assembly 300 and the second bus bar 700, and insulating paper is also disposed between the first bus bar 600 and the core assembly 300, and between the third bus bar and the core assembly 300. The core assembly 300 is also provided with insulation paper around the circumference thereof. The bottom of the core assembly 300 is provided with an insulation sheet.

In one possible implementation, the casing 100 comprises a bottom box and end caps, the bottom box being provided with a rectangular cavity and the top of the bottom box being provided with an opening, the core assembly 300 being mounted inside the rectangular cavity of the bottom box, the structure of the end caps being matched with the structure of the top opening of the bottom box, the end caps being fixed at the openings of the bottom box. The terminal 200 is arranged at the top of the end cover, and the extending end of the terminal 200 penetrates through the end cover and extends into the rectangular cavity of the bottom box body.

In one possible implementation, the pressure relief valve 1020 is further included, and the pressure relief valve 1020 is fixedly installed on the top of the casing 100, that is, the pressure relief valve 1020 is fixedly installed on the top of the end cover and is communicated with the cavity of the casing 100.

In a possible implementation manner, the bottom of the casing 100 is provided with a base, the base is in a rectangular plate shape, and four corners of the base are respectively provided with a through hole for connecting to an external device through screws.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A capacitor comprising a housing, a terminal, and a core assembly;

the terminal is fixedly arranged at the top of the shell, the terminal is provided with an extending end extending into the cavity of the shell, the core component is fixedly arranged in the cavity of the shell, and the core component is electrically connected with the extending end of the terminal;

and a potting material is filled in the cavity of the shell in a sealing manner, and the potting material is a dry potting material.

2. The capacitor of claim 1 wherein said core assembly comprises a plurality of core elements arranged in an array of M rows and N columns;

wherein M is more than or equal to 2, and N is more than or equal to 2;

the electrodes of the core monomers in each row are electrically connected in sequence;

in one row of the core single bodies corresponding to the negative terminal and one row of the core single bodies corresponding to the ground terminal, the electrodes of the core single bodies in every other row are electrically connected.

3. A capacitor according to claim 2, wherein the electrical connections between the electrodes of the core elements are made using copper tape.

4. The capacitor according to claim 2, wherein a busbar is arranged on the top of each column of the core monomers, the number of the terminals is matched with that of the busbars, and the terminals are electrically connected with the busbars in a one-to-one correspondence manner.

5. The capacitor of claim 4, wherein when N-3;

the three rows of the core monomers comprise a first core row, a second core row and a third core row which are sequentially arranged, the bus comprises a first bus, a second bus and a third bus, and the terminals comprise a positive terminal, a ground terminal and a negative terminal;

the first busbar is arranged at the top of the first core column, the first busbar is electrically connected with the first core column, the second busbar is arranged at the top of the second core column, the third busbar is arranged at the top of the third core column, and the third busbar is electrically connected with the third core column;

the top of the first busbar is provided with a first connecting piece, the positive terminal is fixed on one side of the first connecting piece, which is not connected with the first busbar, and the first busbar is electrically connected with the positive terminal;

the top of the second busbar is provided with a second connecting piece, the grounding terminal is fixed on the side of the second connecting piece which is not connected with the second busbar, and the second busbar is electrically connected with the grounding terminal;

the top of the third busbar is provided with a third connecting piece, the negative terminal is fixed on the side, which is not connected with the third busbar, of the third connecting piece, and the third busbar is electrically connected with the negative terminal.

6. The capacitor of claim 5, wherein the first, second, and third connectors are screws.

7. The capacitor of claim 4, wherein the busbars are tinned busbars.

8. The capacitor of claim 1 wherein said core assembly is surrounded by an insulating layer.

9. The capacitor of claim 1 wherein the housing comprises a bottom case and an end cap;

the bottom box body is provided with a cavity, and the top of the bottom box body is provided with an opening;

the core assembly is arranged in the cavity of the bottom box body, the structure of the end cover is matched with that of the opening at the top of the bottom box body, and the end cover is fixed at the opening of the bottom box body;

the terminal is arranged at the top of the end cover, and the extending end of the terminal penetrates through the end cover and extends into the cavity of the bottom box body.

10. The capacitor of claim 1 further comprising a pressure relief valve fixedly mounted on the top of the housing and in communication with the cavity of the housing.

Images