CN220085848U

CN220085848U - Capacitor with large creepage distance

Info

Publication number: CN220085848U
Application number: CN202321671481.XU
Authority: CN
Inventors: 尤枝辉
Original assignee: Foshan Shunde Cg Electronic Industry Co ltd
Current assignee: Foshan Shunde Cg Electronic Industry Co ltd
Priority date: 2023-06-28
Filing date: 2023-06-28
Publication date: 2023-11-24
Anticipated expiration: 2033-06-28

Abstract

The utility model discloses a capacitor with a large creepage distance, which comprises a shell, an electrode core assembly and a cover plate, wherein a mounting cavity is formed in the shell, and the electrode core assembly is mounted in the mounting cavity; the cover plate is arranged at the top end of the mounting cavity and is used for completely sealing the shell after the electrode core assembly is mounted in the mounting cavity; the cover plate is further embedded with a plurality of connecting pieces, each connecting piece comprises an inserting part and a connecting part, the connecting pieces are embedded into the cover plate so that the inserting parts are located at the top end of the cover plate, the connecting parts protrude out of the bottom end of the cover plate, and the connecting parts are used for being electrically connected with the electrode core assembly. It is through setting up the connection piece on the capacitor cover plate to locate the bottom of apron with the connecting portion protrusion of connection piece, so that electric capacity two-stage junction is the step design, increases creepage distance through the step design, has increased creepage distance when making whole electric capacity simple structure workable again, reduces creepage risk.

Description

Capacitor with large creepage distance

Technical Field

The utility model relates to the technical field of electronic elements, in particular to a capacitor with a large creepage distance.

Background

Along with the development of scientific technology, capacitors are widely applied to important equipment such as domestic and foreign household appliances, wind power generation, automation and the like in frequency converters, but under certain high pressure, the two poles of the capacitors are often discharged due to too short distance, namely the creepage phenomenon, and pollution sources such as dust, oil dirt and the like are easy to generate in the environment where the capacitors are used, so that the capacitors are manufactured, the capacitors need to be adjusted in the aspects of capacitor design or technical treatment, the two poles are protected, and the interelectrode distance is increased, so that the capacitors are prevented from being damaged due to the creepage phenomenon. The current method for increasing the creepage distance is to set an umbrella skirt edge on the outer wall of the capacitor shell or to increase insulating materials between electrodes so as to reduce the probability and risk of creepage phenomenon, however, the method makes the capacitor complicated to manufacture, and if the method of adding an umbrella skirt on the outer wall of the capacitor is adopted, the actual creepage distance can be reduced when the umbrella skirt defect of the outer wall is reduced in the later use, so that the capacitor cannot play a good creepage prevention role.

Disclosure of Invention

In order to overcome at least one of the above-mentioned drawbacks of the prior art, the present utility model provides a capacitor with a large creepage distance, which increases the creepage distance by adding steps at the capacitor cover plate.

The utility model adopts the technical proposal for solving the problems that:

the capacitor with the large creepage distance comprises a shell, an electrode core assembly and a cover plate, wherein a mounting cavity is formed in the shell, and the electrode core assembly is mounted in the mounting cavity; the cover plate is arranged at the top end of the mounting cavity and is used for completely sealing the shell after the electrode core assembly is mounted in the mounting cavity; the cover plate is further embedded with a plurality of connecting pieces, each connecting piece comprises an inserting part and a connecting part, the connecting pieces are embedded into the cover plate so that the inserting parts are located at the top end of the cover plate, the connecting parts protrude out of the bottom end of the cover plate, and the connecting parts are used for being electrically connected with the electrode core assembly.

Further, the connection portion is set to be rectangular.

Further, a baffle is arranged at the bottom of the cover plate and is positioned between the adjacent two connecting parts, so that the adjacent two connecting sheets are electrically isolated.

Further, the top of apron is equipped with the boss, still be equipped with a plurality of bellied installation department on the boss, the installation department is used for the cross-under the cartridge portion.

Further, the edge of the boss is also surrounded with a protruding part, and a concave groove is formed between the protruding part and the boss.

Further, clamping parts are arranged on two sides of the mounting part; grooves are formed in two sides of the inserting portion, and the grooves are correspondingly formed in the clamping portion, so that the connecting pieces are clamped on the mounting portion through the grooves.

Further, the electrode core assembly comprises an electrode core and a lead assembly, one end of the lead assembly is electrically connected with the electrode core, and the other end of the lead assembly is electrically connected with the connecting sheet.

Further, insulating glue is filled in the mounting cavity so as to electrically isolate the electrode core assembly from the shell.

Further, the housing is made of metal.

In summary, the capacitor with a large creepage distance provided by the utility model has the following technical effects: it is through setting up the connection piece on the capacitor cover plate to locate the bottom of apron with the connecting portion protrusion of connection piece, so that electric capacity two-stage junction is the step design, increases creepage distance through the step design, has increased creepage distance when making whole electric capacity simple structure workable again, reduces creepage risk.

Drawings

FIG. 1 is a schematic view of the external structure of the present utility model;

FIG. 2 is a schematic diagram of the internal structure of the present utility model;

wherein the reference numerals have the following meanings:

10. a housing; 20. a cover plate; 21. a connection part; 22. a baffle; 23. an insertion part; 30. a boss; 40. a boss; 50. a concave groove; 60. a mounting part; 70. an electrode core; 80. and a lead assembly.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1 and 2, the utility model discloses a capacitor with a large creepage distance, which comprises a housing 10, an electrode core assembly and a cover plate 20, wherein a mounting cavity is formed in the housing 10, the electrode core assembly is mounted in the mounting cavity, the cover plate 20 is arranged at the top end of the mounting cavity, the cover plate 20 completely covers the housing 10 after the electrode core assembly is mounted in the mounting cavity, a plurality of connecting pieces 11 are embedded on the cover plate 20, the connecting pieces 11 comprise an inserting part 23 and a connecting part 21, the inserting part 23 is positioned at the top end of the cover plate 20 after the connecting pieces are embedded in the cover plate 20, the connecting part 21 protrudes out of the bottom end of the cover plate 20, and the connecting part 21 is used for electrically connecting with the electrode core assembly.

On the basis of the above structure, when assembling the capacitor, since the capacitor includes the case 10, the electrode core assembly and the cap plate 20, and the inside of the case 10 is formed with the installation cavity, the electrode core is installed in the installation cavity to fix the electrode core, and then the cap plate 20 is installed at the top end of the installation cavity after the electrode core is installed in the installation cavity, the entire case 10 is capped, and the assembly of the capacitor is completed.

Specifically, the cover plate 20 is provided with the plurality of connecting pieces 11, the connecting pieces 11 are provided with the inserting portion 23 and the connecting portion 21, after the connecting pieces 11 are embedded into the cover plate 20, the inserting portion 23 is located at the top end of the cover plate 20, the connecting portion 21 can protrude out of the bottom end of the cover plate 20, and the connecting portion 21 protruding out of the bottom end of the cover plate 20 is electrically connected with the electrode core assembly, so that the electrode core assembly is electrically charged in the whole capacitor after being installed in the installation cavity.

More specifically, when there is a pollution source such as dust or oil stain in the environment where the capacitor is installed, or under a certain high voltage, a creepage phenomenon is usually generated when the distance between two poles of the capacitor is too short, so that the electrode core assembly short circuit begins to discharge briefly, at this time, if the electrode core is used for electrically connecting the connecting portion 21 and is free from steps, the current may climb to the capacitor shell 10 directly in a short time, so that the whole equipment short circuit is caused, and a potential safety hazard is caused, so that the connecting portion 21 for electrically connecting with the electrode core assembly is protruded from the bottom of the cover plate 20, so that the connecting portion of the electrode core assembly and the connecting portion 21 is in a step design, when the creepage phenomenon occurs, the current needs to bend around the step and then bend down from the step to creep to reach the edge, so that the current needs to bend many times instead of linearly creeping when creeping, and the creepage distance is increased, so that the creepage time is prolonged, and the creepage risk is reduced.

In this embodiment, at least two connecting pieces 11 are provided for connecting the electrode core assembly in two stages, and the electrode core assembly and the connecting portion 21 may be connected by welding.

Further, the connection portion 21 is set to be rectangular.

Specifically, through setting connecting portion 21 to the rectangle, because the rectangle has the characteristics that the area is big, and the rectangle has four sides, when the creep phenomenon appears, the electric current is buckled through the rectangle four sides and is crawled and is not straight going, and then has indirectly increased the creep distance to electrode core subassembly and connecting portion 21 are connected if adopt welded mode, because of the rectangle has the advantage that the area is big, can make electrode core subassembly processing more convenient when connecting portion 21.

It is to be noted that the shape of the connecting portion 21 may be other shapes having a large area.

Further, a baffle 22 is disposed at the bottom of the cover 20, and the baffle 22 is located between two adjacent connecting portions 21 to electrically isolate two adjacent connecting pieces 11.

Specifically, through setting up baffle 22 in the bottom of apron 20 to locate between two adjacent connecting portion 21 at baffle 22, can electrode core subassembly after with two adjacent connecting portion 21 electric connection, prevent to take place the electric reaction and cause the short circuit between two connecting portion 21, and, if the creepage phenomenon appears, there is baffle 22's existence, the electric current can't the straight line crawl to the edge, need follow baffle 22 and buckle and detour and just can reach the edge, further increased creepage distance, reduce creepage risk, improve the security of electric capacity.

Further, a boss 30 is provided at the top end of the cover 20, and a plurality of protruding mounting portions 60 are further provided on the boss 30, where the mounting portions 60 are used to pass through the insertion portion 23.

Specifically, because the top of apron 20 is equipped with boss 30, make apron 20's top also be the step design, thereby when making taking place the creepage phenomenon, the electric current need buckle around going to boss 30 step on then buckle again and follow boss 30 step and go around going down and just can creep to reach the edge, need buckle and the non-straight line creeps many times when making the electric current creep, further increased creepage distance, reduced creepage risk, in order to reduce the risk that the creepage phenomenon caused the short circuit appears in the electric capacity, in addition, still be equipped with installation department 60 on the boss 30, installation department 60 can be used for the cartridge portion 23 of cross-under connection piece 11, make electric capacity adaptation in other equipment through cartridge portion 23.

Further, the edge of the boss 30 is further surrounded with a protrusion 40, and a recess 50 is formed between the protrusion 40 and the boss 30.

Specifically, since the boss 30 is further surrounded with the boss 40, the concave groove 50 is formed between the boss 40 and the boss 30, so that the top end of the whole cover plate 20 is designed in multiple steps, when the capacitor is in a creepage phenomenon, current firstly climbs around the boss 30 and then around the concave groove 50 and then reaches the boss 40 at the edge, the current cannot linearly climb to the edge when creeping, and the current can not pass through multiple steps after bending for multiple times, so that the creepage distance is greatly increased, and the creepage risk is further reduced.

Further, the two sides of the mounting portion 60 are provided with clamping portions, and the two sides of the inserting portion 23 are provided with grooves, and the grooves are correspondingly arranged with the clamping portions, so that the connecting piece 11 is clamped on the mounting portion 60 through the grooves.

Specifically, since the two sides of the mounting portion 60 are provided with the clamping portions, and then the two sides of the inserting portion 23 are provided with the grooves with the same size and shape as the clamping portions, when the inserting portion 23 is inserted into the mounting portion 60, the inserting portion 23 can be clamped on the clamping portions of the mounting portion 60 through the grooves, so that the connecting piece 11 is not easy to loose when being embedded into the cover plate 20.

Preferably, the insertion portion 23 may be welded to the mounting portion 60 so as to be inserted into the cover plate 20.

Further, the electrode core assembly includes an electrode core 70 and a lead assembly 80, wherein one end of the lead assembly 80 is electrically connected to the electrode core 70, and the other end of the lead assembly 80 is electrically connected to the connecting piece 11.

Specifically, since the electrode core assembly includes the electrode core 70 and the lead assembly 80, one end of the lead assembly 80 is electrically connected to the electrode core 70, and the other end of the lead assembly 80 is electrically connected to the connecting piece 11 on the cover 20, so that the whole capacitor is electrically charged.

It should be noted that, the lead assembly 80 in this embodiment includes at least two leads, and may be set according to practical requirements.

Further, an insulating paste is filled in the mounting cavity to electrically isolate the electrode core assembly from the case 10.

Specifically, since the electrode core component and the casing 10 may be electrified due to a high-voltage environment during use, so that the electrode core component and the casing 10 may be electrically reacted to form a short circuit, the gap between the electrode core and the casing 10 is filled with the insulating adhesive by filling the insulating adhesive in the mounting cavity, and further the short circuit caused by the electrical reaction between the electrode core component and the casing 10 is avoided.

It should be noted that the insulating glue used for filling the mounting cavity may be a conventional potting glue or casting glue, and of course, the insulating gas may also be filled in the mounting cavity to electrically isolate the electrode core assembly from the casing 10.

Further, the housing 10 is made of metal.

Specifically, the metal shell 10 has the advantages of incombustibility, explosion prevention and the like, so that the safety and the reliability of the capacitor are improved, and further, the use occasion with higher safety requirements can be better met.

In this embodiment, the material of the housing may be aluminum, but may also be other metal materials that have the advantages of nonflammability and explosion protection and may be used to make the housing.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The capacitor with the large creepage distance is characterized by comprising a shell, an electrode core assembly and a cover plate, wherein a mounting cavity is formed in the shell, and the electrode core assembly is mounted in the mounting cavity; the cover plate is arranged at the top end of the mounting cavity and is used for completely sealing the shell after the electrode core assembly is mounted in the mounting cavity; the cover plate is further embedded with a plurality of connecting pieces, each connecting piece comprises an inserting part and a connecting part, the connecting pieces are embedded into the cover plate so that the inserting parts are located at the top end of the cover plate, the connecting parts protrude out of the bottom end of the cover plate, and the connecting parts are used for being electrically connected with the electrode core assembly.

2. The large creepage distance capacitor as claimed in claim 1, wherein the connection part is provided in a rectangular shape.

3. The capacitor of claim 2, wherein a baffle is disposed at the bottom of the cover plate, and the baffle is disposed between two adjacent connecting portions to electrically isolate two adjacent connecting pieces.

4. The capacitor with large creepage distance as claimed in claim 1, wherein a boss is provided at a top end of the cover plate, and a plurality of protruding mounting portions are further provided on the boss, the mounting portions being configured to pass through the insertion portion.

5. The capacitor of claim 4, wherein the edge of the boss further comprises a protrusion, and a recess is formed between the protrusion and the boss.

6. The capacitor with large creepage distance as claimed in claim 4, wherein two sides of the mounting part are provided with clamping parts; grooves are formed in two sides of the inserting portion, and the grooves are correspondingly formed in the clamping portion, so that the connecting pieces are clamped on the mounting portion through the grooves.

7. The capacitor with large creepage distance as claimed in claim 1, wherein the electrode core assembly comprises an electrode core and a lead assembly, one end of the lead assembly is electrically connected with the electrode core, and the other end of the lead assembly is electrically connected with the connecting piece.

8. The large creepage distance capacitor of claim 1, wherein the mounting cavity is further filled with an insulating glue to electrically isolate the electrode core assembly from the housing.

9. The large creepage distance capacitor of claim 1, wherein the housing is made of metal.