CN209675118U

CN209675118U - A kind of very high voltage film capacitor

Info

Publication number: CN209675118U
Application number: CN201920187757.4U
Authority: CN
Inventors: 谢志懋
Original assignee: Foshan Xinyuan Electronic Ltd By Share Ltd
Current assignee: Foshan Xinyuan Electronic Ltd By Share Ltd
Priority date: 2019-02-03
Filing date: 2019-02-03
Publication date: 2019-11-22
Anticipated expiration: 2029-02-03

Abstract

The utility model provides a kind of very high voltage film capacitor, it is related to thin film capacitor, including capacitor case, combination fuse and pin, the inside for combining fuse includes single fuse and resistance, using three strings three, simultaneously formula is connect single fuse with resistance, and is provided with balance pipe reason.In the utility model, side is singly stayed by changing the common of conventional films capacitor, the structure of two strings or three strings, the utility model uses the structure of single fuse seven string and the external form design using three strings three simultaneously, and design has balance pipe reason, it can be by the zonule for being divided into homalographic of evaporated metal layer rule, to can will puncture in breakdown be deposited in this region area and adjacent vapor deposition section every, so as to effectively control breakdown area, with high security, self-healing ability is strong, high reliability, it is small in size, precision is high, resistance to mechanical intensity is high, the advantages that cost performance is high.

Description

A kind of very high voltage film capacitor

Technical field

The utility model relates to thin film capacitor more particularly to a kind of very high voltage film capacitors.

Background technique

It is taken since China's power capacitor manufacturing has been proposed metallized product in secondary capacitor manufacturing field After original oil immersion paper products.The distinguishing feature of metallized capacitor is exactly to have so-called " self-healing property ", i.e., in gold Breakdown point instantaneous recovery insulation performance and can work as wound healing when dielectric breakdown occurs for categoryization film.

But the self-healing performance with this preciousness obtains while also along with self-healing bring from heat release, it is this local fast Speed heating can exactly make the termination of capacitor acceleration life.For such issues that, generally take in industry field with safety diaphragm or It is the method for increasing sheet resistance to control self-healing ability and exothermic energy.

But when metallized capacitor is using sheet resistance is increased to control self-healing point, under very high working field strength, Self-healing has certain limit, and the forfeiture of self-healing performance will lead to the failure of capacitor.In addition, the use of safety diaphragm can also be with The generation of self-healing point is controlled, but the vapor deposition process of safety diaphragm is more complicated.Therefore, the present invention proposes a kind of with than normal film There is larger sheet resistance, specification is arranged with the high self-healing of temperature and resistance silk, low fever household capacitor special-purpose metal film in plated film.

Summary of the invention

The purpose of this utility model is to provide a kind of very high voltage film capacitors, to solve the above technical problems.

The utility model using following technical scheme in order to solve the above technical problems, realized: a kind of super-pressure thin-film electro Container, including capacitor case, combination fuse and pin, it is characterised in that:

The inside of the combination fuse includes single fuse and resistance, and the single fuse and the resistance are using three strings Three and formula connection, and be provided with balance pipe reason, the inside of the single fuse include dielectric layer film, foil electrode and One-sided metallic organic film, the inside of the dielectric layer film include the first polypropylene film；The foil electrode Include the first aluminium foil, first aluminium foil is arranged on the first polypropylene film at equal intervals in multi-segment structure, and section with It is provided with isolation strip between section, is additionally provided at the top of first aluminium foil and adds coating；The one-sided metallic organic film Inside includes the second polypropylene film and the second aluminium foil, and the top of second polypropylene film is arranged in second aluminium foil Portion, and both sides are provided with and stay side；The inside of the capacitor case is connected by epoxide-resin glue with fuse mucilage binding is combined, described The inside of combination fuse is provided with the pin by cold-welding technique.

Preferably, the dielectric layer film, the foil electrode and the one-sided metallic organic film three it Between using winding by the way of combination fuse is made.By using the design of interior string, increase the requirement for using high current, improves entire The pressure resistance and current-carrying capability of capacitor.

Preferably, the outside of the capacitor case is encapsulated using PBT plastic housing.PBT plastic housing has good insulation Performance.

Preferably, first aluminium foil is provided with seven, and the structure size of seven the first aluminium foils is equal.Using inside The mode that electrode seven is gone here and there increases its requirement for using high current, has good pressure-resistant performance, and effective control breakdown face Product.

Preferably, seven aluminium foils are staggered with seven isolation strip, and the length of seven aluminium foils is plus seven isolation The equal length of the sum of length of band and the first polypropylene film.

Preferably, the length of second aluminium foil adds two of its two sides to stay the sum of the length on side and the second polypropylene film Equal length.

The beneficial effects of the utility model are:

In the utility model, by changing the structure for commonly singly staying side, two strings or three strings of conventional films capacitor, this Form design of the structure and outside that invention uses single fuse seven to go here and there using three strings three simultaneously, and design has balance pipe reason, it can By the zonule for being divided into homalographic of evaporated metal layer rule, thus breakdown when can will puncture in this region be deposited area with Adjacent vapor deposition section is every so as to effectively control breakdown area, with high security, self-healing ability is strong, high reliability, body The advantages that product is small, precision is high, resistance to mechanical intensity is high, cost performance is high, traditional high-voltage capacitor can only achieve several kilovolts, the present invention The extra-high voltage capacitors summarized can reach tens of thousands of volts even ten tens of thousands of volts.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the single fuse of the present invention；

Fig. 2 is the structural schematic diagram of present invention combination fuse；

Fig. 3 is the schematic diagram of internal structure of capacitor case of the present invention；

Fig. 4 is the structural schematic diagram of capacitor of the present invention；

Appended drawing reference: the first polypropylene film of 1-；The isolation strip 2-；The first aluminium foil of 3-；4- adds coating；5- one-sided metallic has Machine film；The second polypropylene film of 501-；The second aluminium foil of 502-；The single fuse of 6-；7- resistance；8- combines fuse；9- pin； 10- capacitor case；11- epoxide-resin glue.

Specific embodiment

In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, under The utility model is further described in face with specific embodiments and the drawings, but following embodiments are only the excellent of the utility model Embodiment is selected, and not all.Based on the implementation example in the implementation mode, those skilled in the art are not making creative work Under the premise of obtained other embodiments, belong to protection scope of the present invention.

Specific embodiment of the utility model is described with reference to the accompanying drawing.

Embodiment 1

As shown in Figs 1-4, a kind of very high voltage film capacitor, including capacitor case 10, combination fuse 8 and pin 9, group The inside for closing fuse 8 includes single fuse 6 and resistance 7, and using three strings three, simultaneously formula is connect single fuse 6 with resistance 7, and is arranged There is a balance pipe reason, the inside of single fuse 6 includes dielectric layer film, foil electrode and one-sided metallic organic film 5, The inside of dielectric layer film includes the first polypropylene film 1；Foil electrode includes the first aluminium foil 3, and the first aluminium foil 3 is in Multi-segment structure is arranged at equal intervals on the first polypropylene film 1, and isolation strip 2 is provided between section and section, the first aluminium foil 3 Top be additionally provided with plus coating 4；The inside of one-sided metallic organic film 5 includes the second polypropylene film 501 and second Aluminium foil 502, the top of the second polypropylene film 501 is arranged in the second aluminium foil 502, and both sides are provided with and stay side；Capacitor case 10 inside is provided with the connection of 8 mucilage binding of fuse, the inside of combination fuse 8 is combined by cold-welding technique by epoxide-resin glue 11 Pin 9.

Between 5 three of dielectric layer film, foil electrode and one-sided metallic organic film using winding by the way of system At combination fuse 8.The outside of capacitor case 10 is encapsulated using PBT plastic housing.First aluminium foil 3 is provided with seven, and seven The structure size of first aluminium foil 3 is equal.Seven the first aluminium foils 3 are staggered with seven isolation strip 2, and seven the first aluminium foils 3 Length plus seven isolation strip 2 equal length with the first polypropylene film 1 of the sum of length.The length of second aluminium foil 502 Add two of its two sides equal lengths for staying the sum of the length on side with the second polypropylene film 501.

Dielectric layer film is placed on one-sided metallic organic film 5, and by first aluminium foil 3 etc. indirectly by true Sky is plated on the first polypropylene film 1, to form single fuse 6, and the outside of single fuse 6 is gone here and there three simultaneously using three The structure of formula is connect with resistance 7, to form combination fuse 8, is subsequently placed in the inside of capacitor case 10, and pass through cold welding skill Art welds pin 9, then can will combine fuse 8 by epoxide-resin glue 11 and connect with capacitor case 10, to be formed Heavy current capacitor, the top of the first aluminium foil 3 is provided with plus coating 4, bears electric current using adding coating 4 that can increase capacitor Ability.

Embodiment 2

Single fuse 6 is provided with three groups, and three groups of capacitor cores form series circuits, is respectively provided with that there are three capacitors inside every group Fuse, three capacitor cores form series connection, and each capacitor core is in parallel with resistance 7, to form three strings three and combined type Capacitor increases its safety, self-healing ability and reliability to increase the ability of the receiving electric current of capacitor.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above " One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only Indicate that first feature horizontal height is less than second feature.

Basic principles, main features, and advantages of the present invention has been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Be only the utility model preference, be not intended to limit the utility model, do not departing from the spirit and scope of the utility model Under the premise of, the utility model also has various changes and improvements, these changes and improvements both fall within claimed it is practical In novel range.The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. a kind of very high voltage film capacitor, including capacitor case (10), combination fuse (8) and pin (9), feature exists In:

The inside of combination fuse (8) includes single fuse (6) and resistance (7), the single fuse (6) and the resistance (7) using three strings three and formula connection, and it is provided with balance pipe reason, the inside of the single fuse (6) includes insulating medium layer Film, foil electrode and one-sided metallic organic film (5), the inside of the dielectric layer film include the first polypropylene Film (1)；The foil electrode includes the first aluminium foil (3), and first aluminium foil (3) is arranged at equal intervals in multi-segment structure It is provided on the first polypropylene film (1), and between section and section isolation strip (2), is also set up at the top of first aluminium foil (3) Have and adds coating (4)；The inside of the one-sided metallic organic film (5) includes the second polypropylene film (501) and the second aluminium Foil (502), second aluminium foil (502) is arranged at the top of second polypropylene film (501), and both sides are provided with and stay Side；

The inside of the capacitor case (10) is connected by epoxide-resin glue (11) with fuse (8) mucilage binding is combined, the combination The inside of fuse (8) is provided with the pin (9) by cold-welding technique.

2. a kind of very high voltage film capacitor according to claim 1, it is characterised in that: the dielectric layer film, Combination fuse (8) is made between the foil electrode and the one-sided metallic organic film (5) three by the way of winding.

3. a kind of very high voltage film capacitor according to claim 1, it is characterised in that: the capacitor case (10) Outside is encapsulated using PBT plastic housing.

4. a kind of very high voltage film capacitor according to claim 1, it is characterised in that: the first aluminium foil (3) setting There are seven, and the structure size of seven the first aluminium foils (3) is equal.

5. a kind of very high voltage film capacitor according to claim 4, it is characterised in that: seven aluminium foils (3) and seven A isolation strip (2) is staggered, and the length of seven aluminium foils (3) is plus the sum of length of seven isolation strip (2) and first poly- third The equal length of alkene film (1).

6. a kind of very high voltage film capacitor according to claim 1, it is characterised in that: second aluminium foil (502) Length adds two of its two sides equal lengths for staying the sum of the length on side with the second polypropylene film (501).