TWM511115U - Metallization safety film explosion proof type axial capacitor structure improvement - Google Patents

Description

Improved structure of metallized safety film explosion-proof axial capacitor

This creation is about the improvement of a metallized safety film explosion-proof axial capacitor structure. After the structure is improved, it can be quickly produced, the quality is stable, and it can increase the voltage-resistant and high-temperature resistant metallized safety film explosion-proof axial capacitor.

The basic function of a capacitor is nothing more than charging and discharging, but there are many possibilities in related applications, such as in an electric motor, which is used to generate phase shift; in a photo flash, it is used to generate high Instantaneous discharge of energy, in circuits, capacitors are often used for coupling, bypassing, filtering, etc.

Most of the capacitors, in order to be combined with the electronic circuit, both terminals fall on the bottom surface of the capacitor. In the coordinate diagram, if the length or diameter of the capacitor is 3 cm, one end of the two terminals falls at 0.5 cm on the X-axis and ends at one end. In the X-axis of 2.5 cm, it is also said that such a capacitor is a planar capacitor or a circuit-specific capacitor.

However, some electronic circuits are saturated due to the load on the surface of the circuit, the capacitors need to be connected in a bridging manner, or some voltage-converting or operational-type active components are prone to high temperatures and the capacitors need to be separated from these high-temperature components, or some Capacitors that need to be added temporarily, such as car audio, are disturbed by car generators, and additional noise is added in the vicinity of the car battery. Or AC to DC circuit, because the load changes too fast, avoiding output Stable, therefore, it is necessary to add a capacitor in the vicinity of the DC output portion of the bridge rectifier to increase the current capacity. Therefore, the axial capacitor is born, and the characteristics of the axial capacitor should be used. On the one hand, the metallized safety film is used to make it It can withstand the effects of high temperature and high voltage. On the other hand, make its shape as round or oblate as much as possible, so that it can find a suitable place in the complicated circuit space of the part.

As shown in the first figure, the conventional metallized film capacitor (a) uses a common metallized film as an electrode and a medium, and the front and rear metallized films are used as internal and external seals after voltage cleaning, and are wound into capacitor elements ( A1), after the two ends are spray-welded, lead wire is axially welded to lead into two terminals (a2), (a3), and one side is glued with PE Mara tape (a4) (temperature resistance 130 degrees), that is, poly The lipid film is used as the substrate, and the acrylic acid flame retardant adhesive is used as the adhesive, and then wrapped and wrapped with epoxy resin (a5) at both ends (it can reach 350-400 degrees for a short time and 200-300 degrees Celsius for a long time). Metalized axial capacitors.

Conventional axial capacitors have the following disadvantages:

1. The traditional axial capacitor is wrapped with PE Mara tape (Mylar), which makes the tape operation difficult and inefficient because of the following reasons. The production cost is high, making the quality level uneven.

a) Due to the safety regulations of capacitors, high voltage tests such as general withstand voltage and surge voltage are regulated. In order to protect the capacitor, the tape is usually wrapped in multiple turns, but it is difficult to control the overlap of the tape, so that the length error after wrapping is large.

b) Elliptical axial capacitance, because the two sides have vertices, the tension is difficult to control when it is attached. At present, there is no mechanical machine that can be automated. Therefore, only the wrapping tape can be manually wounded and mass-produced. It requires a lot of labor, low production efficiency, and high manufacturing cost.

c) When wrapping the wrapping tape by hand, when the tape and the tape are attached to the tape and the tape, it is easy to make the appearance of the capacitor, and the entrapped gas (that is, the raised bubble) can be seen, and it is impossible to avoid touching the semi-finished body of the capacitor, which is usually poor in appearance. Capacitors are easy for capacitor users to have a negative impact on reliability. It is very easy to return the quality inspection on the client side, resulting in loss of return, delay compensation and multiple shipping costs and product reputation.

d) The PE Mara tape used in the traditional product packaging is a thin tape. Due to the limited thickness of the tape (usually 0.2~0.3mm for a single layer), the ability to resist external environmental factors is weak. It is difficult to produce high performance and high reliability products.

2, the traditional type of product needs to be encapsulated with epoxy resin multiple times (at least 4 times at both ends), and because of the axial relationship, it can be applied to the other side after curing, and the curing time of epoxy resin may also need 3-5 Hours, difficult to work, long time, high energy consumption, and easy to produce bubbles affect product quality consistency.

3. Due to the limitations of materials used and manufacturing processes, traditional axial capacitors are difficult to produce high-performance and high-reliability products. For example, high heat resistance, (PE Mara tape temperature is only 130 degrees), high moisture, explosion-proof safety capacitors.

A metalized safety film explosion-proof axial capacitor structure is improved, and the structure can be improved, the production can be fast, the quality is stable, and the metallized safety film explosion-proof axial capacitor with high voltage and high temperature resistance can be added.

The method comprises: a metalized safety membrane element, two opposite ends having two terminals; a hollow cylinder capable of accommodating the metalized safety membrane element, and the metalized safety membrane element two opposite side two terminals are exposed to the cylinder outer; The fixing member is joined to the hollow cylinder, and the metalized safety membrane element is fixed to the central portion of the hollow cylinder; the plastic package is heated and filled into the hollow cylinder to completely cover the metalized safety membrane element, and further It combines a fixture with a hollow cylinder.

In this way, the metallized safety film explosion-proof axial capacitor can be produced in an automated manner, and the defective rate generated in the production can be drastically reduced, and, in use, it has higher environmental temperature tolerance and higher voltage resistance. Pressure value.

"practice"

(a) ‧‧‧Traditional metallized film capacitors

(a1)‧‧‧ Capacitor

(a2) ‧‧‧ terminals

(a3) ‧‧‧ terminals

(a4)‧‧‧PE Mara tape

(a5)‧‧‧ epoxy resin

"This creation"

(1)‧‧‧Metalized safety membrane elements

(11) ‧‧‧ terminals

(12)‧‧‧ terminals

(11a) ‧‧‧Circular

(12a) ‧‧‧Circular

(2) ‧‧‧ hollow cylinder

(21) ‧ ‧ end

(22) ‧ ‧ end

(23) ‧ ‧ class 縁

(25) ‧ ‧ inner circumference

(X)‧‧‧Perforation

(3) ‧‧‧Fixed parts

(31) ‧‧‧

(32) ‧‧‧Perforation

(32a) ‧ ‧ body center

(34) ‧ ‧ ‧ Department

(35)‧‧‧ tentacles

(4) ‧‧‧plastic package

The first figure shows the structure of a conventional metallized film capacitor.

The second picture shows the schematic diagram of the metallized safety film element.

The third figure is a schematic diagram of the first implementation of the present creation.

The fourth figure is a schematic diagram of the second implementation of the present creation.

The fifth figure is a schematic diagram of the third implementation of the present creation.

Please refer to the second figure, which is a metallized safety film explosion-proof axial capacitor structure improvement according to the present invention, which comprises a metallized safety membrane element (1), which is produced by vacuum evaporation. The metallized film of the safety fuse is used as an electrode and a medium, and the double layer is superimposed and a coiled capacitor element is wound in a spiral with a certain error between the two layers. The capacitor element is wrapped by the paper tape and then sprayed on both ends. In order to eliminate the internal winding inductance of the element and facilitate welding. After the capacitor is sprayed and finished, the voltage is removed to eliminate the internal and external impurities and the weak point of the medium, so that the electrical properties of the capacitor are more stable. The opposite side has two terminals (11) (12), two The terminal (11) (12) has one end portion formed in a circumferential shape (11a) (12a); it is also welded to the metallized safety film element (1) on both sides; see the third to fifth figures, a hollow column Body (2), wherein the empty cylinder is made of high-density engineering plastic shell, which is elliptical or circular, and one end portion (21) or two end portions (21) (22) are fully open openings for metallized safety membrane elements. (1) This is placed, and the inside of the fully open opening has a class 縁 (23). When only one end portion (21) is a fully open opening, the other end portion (22) is a semi-closed opening, and the semi-closed open end portion (22) has a terminal through hole (X) at the center for terminal crossing only.

The fixing member (3) has a sheet shape, and the circumference (31) is equivalent to the inner circumference (25) of the hollow cylinder (2), and can be placed in the hollow cylinder (2) and overlapped on the inner side of the fully open opening. On the class 縁 (23), the sheet has a plurality of perforations (32), one of which is placed at the center of the sheet (32a) for the terminal (11) (12) to pass through, and the other perforations (32) are available for the molded package. (4) Injection.

The fixing member (3) is also in the form of a hollow sleeve, and the inside of the hollow sleeve has a sleeve portion (34), the sleeve portion (34) can accommodate the metalized safety membrane element (2), and the outer side of the sleeve body extends the plurality of antennae (35). The plurality of antennae are equivalent to the inner circumference of the hollow cylinder (25), and the sleeve containing the metalized safety membrane element can be clamped therein, and the hollow sleeve sleeve portion (34) and the outer side of the sleeve body have multiple antenna angles (35), which are plasticized. The body is formed, for example, by pouring epoxy resin into a mold and solidifying.

The molded package (4) is an epoxy resin, which is liquid when no coagulant is added, and solidifies into a solid state within a few hours depending on its characteristics when a coagulant is added.

The following is an embodiment (A). The hollow cylinder (2) has a fully open opening (21) on one side, a class 縁 (23) on the inner side, and a semi-closed opening on the other side (22); In the form of a sheet, the circumference (31) is equivalent to the inner circumference of the hollow cylinder (25), and can be lapped to the hollow column. The body (2) is fully open on the inner side of the open jaw (23), the sheet has a plurality of perforations (32), wherein a perforation (32) is placed in the center of the sheet for the terminal (11) (12) to pass through, and other perforations can be The plastic package (4) is injected, the plastic package (4) can be epoxy resin, and when the plastic package (4) is injected, the hollow cylinder (2) has a fully open opening (21) facing upward, semi-closed The type opening (22) faces downward, and the metalized safety membrane element terminal (11) (12), one end (11) is first traversed by a semi-closed opening (22), and the semi-closed opening (22) has a terminal perforation at the center. (X), only for the terminal (11) (12) to pass through, first expose a terminal (11) to the semi-closed opening (22), and connect the metallized safety membrane element (1) of the terminal to the hollow cylinder (2) In the middle, the body-shaped fixing member (3) has a circumference (31) corresponding to the inner circumference (25) of the hollow cylinder, and can be overlapped on the inner side of the hollow cylinder full-opening opening (23). The sheet has a plurality of perforations (32), wherein a perforation (32) is placed at the center of the sheet for the terminal (11) (12) to pass through, and both terminals are exposed outside the hollow cylinder (2), at this time Non-central complex perforations (32) on the body-like fixture, poured into (4) injection type package (4), the package molding, the hollow cylinder (2) full-opening an opening (21) upward after a certain time into a metal explosion-proof axial Safety Film capacitor.

(B) hollow cylinder (2) two end portions (21) (22) are fully open openings, the inside of the opening has a class 縁 (23); the fixing member (3) is in the form of a sheet, the circumference (31) and The inner diameter (25) of the hollow cylinder is equivalent, and it can be overlapped on the inner side of the hollow cylinder full opening opening (23), the sheet has a plurality of perforations (32), and a perforation (32) is placed on the sheet. The center can be used for the terminal (11) (12) to pass through, the other perforations (32) can be injected into the thermoplastic package (4), and the molded package (4) can be epoxy. First, the first fixing member (3) piece is overlapped on the inner side of the hollow cylinder (2) on the inner side of the fully open opening, and is fixedly closed by adhesive bonding, and the closed opening is fixed after fixing. The hollow cylinder (2) ends downward, and the metallized safety membrane element (1) The side terminal (11) or (12) is first turned down by the upwardly open fully open opening, and inserted into the perforation (32) of the center of the closed opening fixture body and passed through, and the other has a plurality of perforations ( 32) and the center perforation (32) into a piece-like fixing member, first piercing its center through the metallized safety film element side terminal (11) or (12), and then the body-like fixing member (3), week The diameter (31) is equivalent to the inner circumference (25) of the hollow cylinder, and can be lapped on the inner side of the hollow cylinder full-opening opening (23), so that the metallized safety membrane element (1) is fixed and The thermoplastic package is injected by a plurality of perforations (32) and becomes a metallized safety film explosion-proof axial capacitor after a certain period of time.

(C) The hollow cylinder (2) has a full-opening on both sides, and the inner side of the hollow cylinder has a class 縁 (23); its fixing member (3), one piece is in the form of a sheet, and the circumference (31) and hollow The inner circumference of the cylinder (25) is equivalent and can be placed in the hollow cylinder (2). The sheet has perforations (32), and the perforations (32) are placed in the center of the sheet for the terminals (11) or (12) to pass through. The other fixing member (3) has a hollow sleeve shape, and the inner side of the hollow sleeve has a sleeve portion (34), and the sleeve portion (34) can accommodate the metalized safety membrane element (1), and the outer side of the hollow sleeve body extends the plurality of antennae ( 35), the plurality of antennae are equivalent to the inner circumference of the hollow cylinder (25), and the sleeve containing the metalized safety membrane element can be clamped therein, and the hollow sleeve sleeve portion (34) and the outer side of the sleeve body have a plurality of antennae (35). It is made of a molded body, for example, formed by pouring an epoxy resin into a mold and solidifying it.

The plastic package (4) is epoxy resin. It is liquid when no coagulant is added. When the coagulant is added, it will solidify into solid state within a few hours according to its characteristics. The outer tentacles (35) and the complex antennae are extended outside the sleeve. (35) Corresponding to the inner circumference (25) of the hollow cylinder (2), the casing (3) containing the metalized safety membrane element (1) can be inserted therein. Therefore, the above-mentioned sheet-like fixing member (3) is first mounted on the inner side of the hollow cylinder (2), and is bonded to each other so that the side of the hollow cylinder (2) is semi-closed. Metallization with terminal (11) or (12) The safety membrane element (1) is placed on the other fixing member (3) and the hollow sleeve body is placed into the hollow cylinder body (2) such that one terminal (11A) or (12A) passes through the sheet body having the central perforation (32). The one-side full-opening hollow cylinder (2) faces upward and is poured into the molded package (4), and becomes a metallized safety film explosion-proof axial capacitor after a certain period of time.

According to the above, this patent has the following advantages:

1. One-shot injection molding technology, made into high-density engineering plastic shell, the capacitor is directly inserted into the positioning, and the upper and lower positioning holes are used for positioning, and the high-density epoxy resin package is directly dispensed at one time. It replaces the traditional axial type capacitor with PE Mara tape wrapping and epoxy resin multiple packaging methods, completely overcoming the process defects and performance shortcomings of the traditional artificial bag tape manufacturing method.

2, can achieve mechanical automation production, greatly improve work efficiency, shorten process cycle, reduce production energy consumption and production costs.

3. At the same time, due to the use of high-performance new materials, the quality level and consistency have been greatly improved, and it can be self-protected under the electrical load, with safety and explosion-proof functions. Capacitors encounter errors in operation, up to 10,000 amps of short-circuit current, the capacitors are in a safe state. Therefore, the new model is in compliance with the requirements that can be implemented, unpublished and progressive before the application, in accordance with the requirements of the patent application, and accordingly Give a new patent.

(1)‧‧‧Metalized safety membrane elements

(11) ‧‧‧ terminals

(12)‧‧‧ terminals

(2) ‧‧‧ hollow cylinder

(21) ‧ ‧ end

(22) ‧ ‧ end

(23) ‧ ‧ class 縁

(25) ‧ ‧ inner circumference

(X)‧‧‧Perforation

(3) ‧‧‧Fixed parts

(31) ‧‧‧

(32) ‧‧‧Perforation

(32a) ‧ ‧ body center

(4) ‧‧‧plastic package

Claims (14)

A metalized safety film explosion-proof axial capacitor structure is improved, which comprises: a metalized safety membrane element, two opposite sides having two terminals; a hollow cylinder capable of accommodating metallized safety membrane elements and a metallized safety film The two terminals of the opposite side of the element are exposed outside the cylinder; the fixing member is engaged with the hollow cylinder, and the metalized safety membrane element is fixed to the central portion of the hollow cylinder; the plastic package is filled with the hollow column after heating In the body, it is completely covered with metalized safety membrane elements, and it is combined with the fixing member and the hollow cylinder. The metallized safety film explosion-proof axial capacitor structure described in claim 1 is improved by vacuum evaporation, and a metallized film with a safety fuse is used as an electrode and a medium. And the capacitor element is wound in a spiral shape with a certain error between the two layers. After the capacitor is wrapped by the paper tape, the gold is sprayed on both ends to eliminate the internal winding inductance of the element and facilitate the welding. After the capacitor element is sprayed and peeled, Voltage removal is required to eliminate the weak points inside and outside the impurities and the dielectric, and the sides of the terminals are rounded to each side of the element. An improved metallized safety film explosion-proof axial capacitor structure according to claim 1, wherein the empty cylinder has an elliptical shape and a circular shape, and has openings at both ends. The invention relates to a metallized safety film explosion-proof axial capacitor structure according to claim 3, wherein the elliptical hollow cylinder has a fully open opening at one end, and the metallized safety membrane element can be placed therein. The inside of the opening has a class 縁, and the other side is a semi-closed opening, only the terminal is exposed outside the cylinder. A metallized safety film explosion-proof axial capacitor structure according to claim 3, wherein the elliptical hollow cylinder has a full-opening at both ends, and a class 縁 on the inner side of the fully open opening. An improved metallized safety film explosion-proof axial capacitor structure according to claim 1, wherein the empty cylinder has a circular shape and has openings at both ends. The invention relates to a metalized safety film explosion-proof axial capacitor structure improved according to claim 6, wherein the circular hollow cylinder has a fully open opening at one end, and the metallized safety membrane element can be placed therein. The inside of the opening has a class 縁, and the other side is a semi-closed opening, only the terminal is exposed outside the cylinder. A metallized safety film explosion-proof axial capacitor structure according to claim 6 is characterized in that the circular hollow cylinder has a full-opening opening at both ends, and a class 縁 on the inner side of the fully open opening. The metal-shielded safety film explosion-proof axial capacitor structure described in claim 1 is improved in that the fixing member has a sheet shape, and the circumference is equal to the circumference of the hollow cylinder, and can be placed in the hollow cylinder. The body has a plurality of perforations, one of which is placed in the center of the sheet for the terminal to pass through, and the other perforations are for injection into the molded package. The metal-shielded safety film explosion-proof axial capacitor structure according to claim 1 is improved, and the fixing member is in the form of a hollow sleeve, and the hollow sleeve can accommodate the metalized safety membrane element, and the outer side of the sleeve body extends the plurality of antennae The plurality of antennae are equivalent to the inner circumference of the hollow cylinder, and the casing containing the metalized safety membrane element can be clamped therein. The metal foamed safety film explosion-proof axial capacitor structure according to claim 1 is improved, the hollow cylinder has a full-opening opening on one side, a class 縁 on the inner side, and a semi-closed opening on the other side; In the form of a sheet, the circumference is equal to the circumference of the hollow cylinder, and it can be overlapped on the inner side of the open-opening of the hollow cylinder. The sheet has a plurality of perforations, one of which is placed at the center of the sheet and is available for The terminal is traversed, and other perforations can be injected into the thermoplastic package. When the thermoplastic package is injected, the hollow cylinder has a fully open opening facing upwards, a semi-closed opening facing downward, a metallized safety membrane element terminal, and one end is first semi-closed. The opening of the opening passes through, so that one terminal is exposed to the semi-closed opening, The metallized safety membrane element connected to the terminal is erected in the hollow cylinder, and the body-shaped fixing member has a circumference corresponding to the inner circumference of the hollow cylinder, and can be overlapped on the inner side of the hollow cylinder full-opening opening. In the upper part, the sheet body has a plurality of perforations, wherein a perforation is placed in the center of the sheet body for the terminal to pass through. At this time, the two terminals are exposed to the outside of the hollow column, and at this time, the plurality of perforations on the sheet-shaped fixing member are non-centered and poured into the plastic body. The package is a metallized safety film explosion-proof axial capacitor after a certain period of time. For example, the metallized safety film explosion-proof axial capacitor structure described in claim 1 is improved, the hollow cylinder is a full-opening opening, and the inner side of the opening has a class 縁; the fixing member is in the form of a sheet, the circumference and the hollow The circumference of the column is equivalent, and it can be overlapped on the inner side of the open-opening of the hollow cylinder. The sheet has a plurality of perforations, one of which is placed in the center of the sheet for the terminal to pass through, and the other perforations are available for thermoplastic molding. Injecting the type of package body, firstly, the first fixing piece body is overlapped on the inner side of the fully open opening on one side of the hollow cylinder body, and is adhered to each other to be fixedly closed, and the closed hollow cylindrical body end is fixed downward after being fixed. The metallized safety membrane element side terminal is first turned down from the upwardly open full opening, and inserted into the perforation at the center of the closed opening fixture body and passed through, and the other has a plurality of perforations and a center perforation The body-shaped fixing member firstly perforates the center through the terminal of the metallized safety film element, and then the body-shaped fixing member has a circumference corresponding to the circumference of the hollow cylinder, and can be overlapped with the hollow cylinder. all On the inner side of the open opening, the metallized safety film element is fixed, and the thermoplastic package is injected, and after a certain period of time, it becomes a metallized safety film explosion-proof type axial capacitor. As shown in claim 1, the metallized safety film explosion-proof axial capacitor structure is improved, the two sides of the hollow cylinder are full-opening, and the inner side of the hollow cylinder has a class 縁; The body shape is similar to the circumference of the hollow cylinder, and can be placed in the hollow cylinder. The sheet body has perforations placed in the center of the sheet body for the terminal to pass through, and the other fixing member is hollow and hollow. The sleeve can accommodate the metallized safety membrane element, and the outer side of the sleeve body extends a plurality of antennae, and the plurality of antennae are equivalent to the inner circumference of the hollow cylinder, so that the sleeve card containing the metalized safety membrane element can be arranged. In this case, the first piece-like fixing member is first mounted on the inner side of the hollow cylinder, and is bonded to make the side of the hollow cylinder semi-closed, and the metallization of the terminal is safe. The membrane element is placed on the hollow sleeve of another fixing member and placed in the hollow cylinder, so that one terminal passes through the sheet having the perforation, and one side of the full-opening hollow cylinder faces upward, and is poured into the plastic package for a certain period of time. After that, it became a metallized safety film explosion-proof axial capacitor. The metallized security film explosion-proof axial capacitor structure according to the first aspect of the patent application is improved, and the molded package is epoxy resin.