TW200837786A - Electrolytic capacitor - Google Patents

Abstract

The present invention provides an electrolytic capacitor, which includes a combinational insulating housing having a base defined therein an accommodation space for receiving the winding part of a capacitor insulator, and an enclosing body for closing the opening of the base. The capacitor insulator has several pins projected from the bottom of the housing, and is sealed and fixed by the sealing glue. Accordingly, the present invention is able to provide a simplified structure suitable for solid or liquid electrolytic capacitor so as to reduce the manufacturing cost, and also provide an electrolytic capacitor with large capacitance by assembling multiple capacitor insulators therein.

Description

200837786 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a capacitor, and more particularly to an electrolytic capacitor construction design suitable for both solid and liquid. [Prior Art] At present, there are two types of electrolytic capacitors known as solid electrolytic capacitors and liquid electrolytic capacitors, among which: solid electrolytic capacitors include aluminum shell solid electrolytic capacitors and plastic S shell solid electrolytic capacitors, and currently available in solid state. Electrolytic capacitors are mostly aluminum-shell solid electrolytic capacitors, wherein: the aluminum-shell solid electrolytic capacitor is constructed by placing a capacitor element inside an aluminum casing and sealing it to the aluminum casing with a port rubber. The opening is sealed by the beam diameter means applied to the opening of the aluminum casing. However, the aluminum-shell solid electrolytic capacitor is required to be sealed at the opening of the aluminum casing by a sealing rubber having a certain thickness, which is disadvantageous in reducing the size of the capacitor.

The plastic shell solid electrolytic capacitor is designed to overcome the shortcoming of the above-mentioned aluminum shell solid electrolytic capacitor, which is composed of a capacitor element and an insulating resin coated on the capacitor element. a housing having an outer side, the capacitor element having a winding portion formed by winding an anode foil, a cathode foil, and a conductive polymer electrolyte layer, wherein the winding portion is wrapped in the outer casing, The anode foil and the cathode foil are respectively connected with a pin extending outside the outer casing. The liquid electrolytic capacitors also include aluminum shell liquid electrolytic capacitors 4 200837786 to = win liquid electrolyte capacitors, etc. Currently, the market liquid electrolyte capacitors are still mostly aluminum shell liquid electrolytic capacitors, among which. The electrolytic capacitor is constructed in such a manner that the sub-input-inside of the casing is filled in and the electrolyte is injected into the inside of the inscription housing, and then sealed with the sealing rubber at the opening of the aluminum casing, and by the beam diameter The means is applied to the opening σ of the (four) mass shell to seal. However, in this domain, the electrolytic capacitor n is sealed by the sealing rubber of a predetermined thickness in the opening portion of the first metal body, which is disadvantageous in that the size of the capacitor is reduced, and the electrolyte is liable to leak.

The plastic shell liquid electrolytic capacitor is designed to overcome the above-mentioned aluminum shell liquid electrolytic capacitor 'no> size reduction and electrolyte leakage, etc. The designer's composition of the plastic shell liquid electrolytic capacitor is as in our patent. No. 1241605, "Thin Wafer Electrolytic Capacitor Construction" disclosed in the patent application, which has a combined outer casing, a capacitor element and an electrolyte. The combined casing has a shell body, a shell base and a shell made of an insulating material. The top cover has a partition in the shell body to partition the inner space into an accommodating space, and an isolating space is arranged vertically. The partition is provided with two-pin perforations, and the capacitor element has a set of anodes. a foil, a cathode foil, and a winding portion formed by winding the electrolyte layer, wherein the anode foil and the cathode foil are respectively connected with a pin, and the capacitor element is installed in the shell body, and the winding portion thereof is located In the accommodating space, the two pins are perforated through the two pins of the spacer and protrude outside the isolation space, and the epoxy resin is filled in the isolation space at the bottom of the housing body. And mounting the shell base to seal, and the two pins are pierced out of the shell base, and the electrolyzed space is filled in the accommodating space of the shell body with the capacitor element; 200837786 liquid is fixed on the top cover The opening of the top of the housing body of the housing body is sealed so that the internal electrolyte does not leak out, and becomes a liquid electrolytic capacitor. However, the existing solid electrolytic capacitors are directly coated on the outside of the coiled portion of the capacitor element by using the insulating material directly, but the design is limited to the solid electrolytic capacitor, and is not suitable for the liquid electrolytic power benefit of the internal electrolyte to be filled. And it is not easy to manufacture an electrolytic capacitor having a plurality of capacitor elements. As for the liquid electrolyte capacitors disclosed above, the design of the combined insulating housing can be used to make it suitable for use in conjunction with the Thunderbolt I 7 _ a. , _

It is published in the market competitiveness of low-priced electrolytic capacitors. %

When the surface is glued, the solder is less likely to climb to the top surface of the pin. The smaller area on the side provides the soldering and fixing to the board. The two pins of the device must be further flattened on the two sides of the top surface of the two pins to be adhered to the surface of the insulating surface. The soldering is fixed on the surface of the board, only the bottom surface of the pin and the straight part, which makes the pin difficult to stabilize. 200837786 SUMMARY OF THE INVENTION The main object of the present invention is to provide a design, a step-by-step modification of the cover material a, and the disadvantages of the complicated construction of the electrolytic capacitor combination. And, and many components, in order to achieve the purpose of the pre-existing, too include: The electrolytic capacitor designed by this month is mainly ^ electric glutinous, including a winding part to the winding part including a Yangshuo Hyun ^ W foot , a cathode foil, a cathode foil and an isolation layer disposed between the cathode and the anode foil are wound and formed, #•, μ two pins are respectively connected to the anode foil and the cathode foil, and r, the insulating shell has - a housing base and a closed cymbal, the inside of the housing base = at least the accommodating space ' ^ the bottom portion of the accommodating space: there are at least two pin perforations, and the winding portion of the capacitor element is disposed in the accommodating 1 The pins are respectively pierced through the pin perforations, and the bottom of the insulating case is provided with (4) a colloid to seal and fix the pins, and the sealing body is sealed and fixed.

At the opening of the base σρ, the winding portion of the capacitor element is sealed in the insulating case. The invention is characterized by the structural design of the front electrolytic capacitor, which is characterized in that: a single or a plurality of electric materials are provided, which are sealed and sealed, and can be applied to a solid or liquid state. Electrolytic power is 'can be used to seal the pins with a small amount of sealing gel' to overcome the disadvantages of the complicated construction and high cost of the prior art electrolytic capacitor construction using the combined housing. In addition, the present invention can also utilize the shell base in the combined housing, and the susceptor can be provided in the subsequent process or after the package 70 is formed. Safety protection, to avoid damage to the capacitor element and ensure the quality of the capacitor. On the other hand, the present invention can also utilize the combined outer casing design of the shell base and the enclosure, and the setting of the position of the grain can be accurately set to make the electrolytic capacitor a capacitor having a large capacitance. A second object of the present invention is to form a notch at the end of the bottom surface of the flat portion of the insulating member with respect to the end of the flat extension of the pin 7jc, whereby the electrolytic cell is soldered to the circuit board by surface bonding technology. , can be used:: make the solder easy to climb to the top surface of the pins to be fixed, and increase the area of the rod, so that the pins of the electrolytic capacitor can be firmly fixed to the electricity [Embodiment] - the invention of death Electrolytic capacitors can be solid electrolytic capacitors or liquid electrolysis

As shown in the first to second and seventh figures, several preferred embodiments of the electrolysis: the state of the invention are disclosed. As can be seen from the figure, the electrolytic capacitors mainly comprise an insulating shell ( 1 0 ) and at least - a capacitor element (20), wherein the insulating housing (10) is a combined hollow housing structure mainly having a shell base (11) and an enclosure ( i 2 丄 The base of the shell (i η is formed of a material such as insulating plastic, etc., and the inside of the base (1 1) is formed with at least one opening space (3) with an opening facing upward for providing one or more capacitors The element (2〇) is placed as shown in the first and second figures, revealing that the shell base (1丄) has an accommodation space of 8 200837786, and the third figure shows that the shell base (1 1 ) There are a plurality of accommodating spaces (1 3 ), and each accommodating space (1 3 ) is respectively provided with a capacitor element (2 〇), so that it has a large capacitance, and the accommodating space (1 3 ) The bottom plate portion (14) is provided with at least two pin perforations (15) extending to the bottom surface of the shell base (1 1 ). The first to third figures and the In the preferred embodiment shown in FIG. 6, the enclosure (12) may be a pre-molded top cover of a material such as an insulating plastic material, and is resealed to an opening at the top of the casing base (1 1 ). The joint portion between the molded top cover type enclosure (12) and the shell base (1 1 ) may be bonded by means of an adhesive, or by thermal fusion means, or by ultrasonic bonding means, etc. The two are tightly bonded together; as in the preferred embodiment of the seventh embodiment, the closed body (12) can be directly applied to the base of the case by using a colloid such as an epoxy resin. The top opening is solidified and formed. As shown in the first to fourth figures, the capacitor element (20) includes a winding portion (2 1 ) and at least two pins (2 2 ), the winding portion (2) 1) having an anode foil (2 workers), a cathode foil (2丄2), and a separator (2 1 3 ) disposed between the anode box (211) and the cathode box (212), and being formed by winding, And the anode foil (2] i ) and the bottom edge of the cathode foil (2 1 2 ) are each provided with at least one pin (2 2 ), as shown in the fourth figure, when the anode crucible (2 1 1 Or when the cathode box (2 1 2 ) is provided with two or more pins (2 2 ), the electrolytic capacitor has the effects of reducing impedance and inductance resistance. In the foregoing, when the electrolytic capacitor is a solid electrolytic capacitor At the time of the first, second, fifth, and seventh diagrams of the ninth, the second, the fifth, the fifth, and the seventh, the coiled portion (21) of the capacitor element (2) is provided with a solid conductive polymer electrolyte (not shown), and the capacitor element (not shown) 20) Before the enclosure (丄2) of the casing (1) is not fixed to the casing base (1 1 ), the winding portion (21) is placed in the casing base (1 1). In space (13), the number of pins (2 2 ) of the capacitor element (2 0 ) respectively protrudes from the pin perforation (15) of the bottom plate portion (1 4 ) of the case base (1 1 ), and The bottom of the shell base (1 1 ) is sealed by a sealing colloid (1 6 ) (such as epoxy resin, etc.) between the pins of the bottom plate (2 2 ) and the bottom plate portion (1 4 ) (1 5 ) Sealed and fixed.

When the electrolytic capacitor is a liquid electrolytic capacitor, as shown in the first, second, and sixth figures, the capacitor (20) in the housing (1) is not fixed to the housing base. Before (1 1 ), the winding portion (21) is placed in the accommodating space (13) of the shell base (1 1), and the number of pins (2 2 ) of the capacitor element (2 0 ) are respectively A pin perforation (15) of the bottom plate portion (1 4 ) of the shell base (1 1 ) is extended, and a sealing colloid (1 6 ) (such as epoxy resin, etc.) is provided at the bottom of the base (1 1 ). Sealing and fixing the pins (2 2 ) and the pin holes (15) of the bottom plate portion (1 4 ), and injecting an electrolyte into the accommodating space (1 3 ) of the shell base (1 1 ) (2 3), the enclosure (12) is sealed to the opening of the top of the shell base (1 1 ) so that the electrolyte (23) is not leaked. In the preferred embodiment, the enclosure (1) 2) It is preferred to use a molded top cover type closure. In the foregoing, as shown in the second, eighth, and ninth figures, the casing (1 〇) is still in the form of a hole in the hole of the pin (丄5) of the bottom surface of the casing base (1 1 ). The rubber pocket (171, receiving ^ ^ ^ ) is filled with the sealing gel (16), and the pins (2 2 ) and the bottom plate portion (丄4) are pierced (15) Sealed and fixed. In the above description, the capacitor element (2 〇) protrudes from the bottom of the housing (1 〇), the number of pins (2 2 ) can be, or the pins are bent out to the corresponding sides) And as shown in the eighth figure, the pins on the bottom of the case base (11) (2 2) are bent in the space above the height

Longitudinal extension (as shown in the fifth, sixth, and seventh figures (22), extending from the bottom of the casing (1〇) and extending horizontally (as shown in Figures 8 and 9), the casing (1 〇) can be further a plurality of flanges (1 8 ) are disposed on the circumference so that the horizontal section (2 2 1 ) is located at the flange (in addition, as the eighth, the η 私 九 九 九, the housing (10) The bottom surface of the shell bottom 11) is opposite to the pins (the gap is formed at the end edge (i 9), μ, and the ten-nano is above the ruler + also π y). The sig gap (1 9 ) can be externally directed to the technology. In this way, when the electrolytic capacitor is connected to the circuit board by the surface material, it is easy to climb the tin (4) to make the pin (the top surface of the 2 9 af is fixed, and increase every 2) and the solder. The area of the lead of the technician, so that the electrolytic P (22) can be firmly fixed to the circuit board. [Simplified description of the drawing] The drawing is the electrolytic mine of the present invention ☆ w - better real state The schematic diagram of the stereoscopic decomposition of a single capacitive element only target example. The second figure is a schematic diagram of the preferred embodiment of the electrolytic capacitor shown in the first figure, 200837786. The electrolytic capacitor of the present invention has a three-dimensional exploded schematic view of a preferred embodiment of a plurality of capacitive elements. The fourth figure shows that the electrolytic capacitor of the present invention is relatively flat, and the capacitive element has a helmet pin. Fig. 5 is a schematic cross-sectional view showing a capacitor of a preferred embodiment of the electrolytic capacitor shown in Fig. - Fig. 6 is a preferred embodiment of the electrolytic capacitor shown in the first figure. Schematic diagram of the unwinding capacitor. ^ % The seventh figure is a schematic cross-sectional view of another example of the early mussel target of the electrolytic capacitor of the present invention.

The eight-fifth figure of the brother-in-law shows that the electrolytic capacitor is crying in the perspective of the pin on the side of each of the A. % The ninth figure is a perspective view of the electrolytic capacitor shown in the first figure, which is preferably bent to the sides. η

(11) Shell base (1 3 ) accommodating space (1 5 ) Pin perforation (1 7 ) Filling pocket (1 9 ) Notch (2 1 ) Winding section (212) Cathode foil (2 2 ) Pin [Main component symbol description (10) Housing (1 2 ) Closed body (14) Base plate portion (1 6 ) Sealing colloid (1 8 ) Flange (20) Capacitor element (211) Anode foil (213) Isolation layer 12 200837786 2 3) Electrolyte (2 2 1 ) horizontal section

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Claims (1)

200837786 X. Patent application scope: 1 . An electrolytic capacitor comprising: at least one capacitor element, comprising a winding portion and at least two pins, the winding portion comprising an anode falling, a cathode box and being disposed on the An isolation layer between the anode and the cathode box is wound and formed, the pins are respectively connected to the anode foil and the cathode foil; and an insulating shell has a shell base and an enclosure, and the shell base forms at least one opening upward The accommodating space is provided with at least two pin perforations in the bottom plate portion of the accommodating space, and the winding portion of the capacitor element is disposed in the accommodating space, and the pins respectively pass through the pin perforations. The bottom of the insulating housing is provided with a sealing gel for sealing and fixing the pins. The sealing body is sealed and fixed to the opening of the top of the housing base, so that the winding portion of the capacitor element is sealed in the insulating housing. The electrolytic capacitor according to the first aspect of the invention, wherein the coiled portion of the capacitor element is provided with a solid conductive polymer electrolyte. 3. The electrolytic capacitor of claim 2, wherein the enclosure of the casing is a molded top cover, and the seal 1U is provided at an opening at the top of the casing base. 4. The electrolytic capacitor according to claim 3, wherein the closed body of the side body is solidified by a gel coating seal at the top opening of the shell base. The electrolytic capacitor according to the first aspect of the invention, wherein the insulating housing is filled with an electrolyte. 6. The electrolytic capacitor of claim 5, wherein the enclosure of the assembly is a molded top cover sealed to the opening at the top of the housing base. 7. The electrolytic capacitor according to any one of claims 1 to 6, wherein a hole is formed in each of the pin perforation holes on the bottom surface of the case base, and the seal colloid is filled therein. . 8. The electrolytic capacitor according to claim 7, wherein the number of pins of the electric gluten passing through the bottom of the casing extends longitudinally. The electrolytic capacitor of claim 7, wherein the number of the capacitor elements is bent out of the bottom of the housing and bent to the opposite sides to extend horizontally. The electrolytic capacitor of claim 9, wherein the bottom surface of the shell base forms a gap with respect to an end edge above the end of the horizontal extension of the pins. The electrolytic capacitor according to claim 10, wherein the notch is an oblique recess which is tapered from an outer inward dimension. 1 2 as Shen. The electrolytic capacitor according to Item 7, wherein the installation body is provided with a plurality of flanges on the periphery of the bottom surface of the base. The electrolytic capacitor of the δth aspect of the patent, wherein the peripheral edge of the bottom surface of the casing base of the casing is provided with a plurality of flanges. The electrolytic capacitor according to claim 9, wherein the peripheral edge of the bottom surface of the casing base of the casing is provided with a plurality of flanges. The electrolytic capacitor boundary according to the first aspect of the invention, wherein the peripheral edge of the bottom surface of the shell base of the housing is provided with a plurality of flanges. 1 6 · If the patent application is 笙 ^ ^ , 15 200837786 , where the periphery of the bottom surface of the shell base of the casing is provided with a plurality of flanges. XI. Schema: as the next page 16