A large-capacity aluminum electrolytic capacitor

Abstract

The present invention discloses a large-capacity aluminum electrolytic capacitor, which includes at least two aluminum electrolytic capacitor monomers, namely a first one and a second one; wherein, the first aluminum electrolytic capacitor monomer includes a first cover plate and a second cover plate, and a threaded post is arranged on the first cover plate; the second aluminum electrolytic capacitor monomer includes a top cover plate and a bottom cover plate; the top cover plate is a packaging cover plate for hermetically packaging the core package in the aluminum shell; the bottom cover plate is a connecting cover plate, and a threaded sleeve structure is arranged on the bottom cover plate; the bottom cover plate of the second aluminum electrolytic capacitor monomer is connected to the threaded post on the first cover plate of the first aluminum electrolytic capacitor monomer through the threaded sleeve. The large-capacity aluminum electrolytic capacitor of the present invention can conveniently realize the connection of the aluminum electrolytic capacitor monomers through the cover plates by arranging the first cover plate and the second cover plate on a single first aluminum electrolytic capacitor monomer, and arranging the top cover plate and the bottom cover plate on the second aluminum electrolytic capacitor monomer, so as to obtain a large-capacity aluminum electrolytic capacitor.

Description

Technical Field

[0001] The present invention belongs to the technical field of capacitors, and particularly relates to a large-capacity aluminum electrolytic capacitor. Background Art

[0002] With the rapid development of consumer electronic products, while the aluminum electrolytic capacitor is growing steadily in the field of consumer electronics, its application fields have been expanded in many emerging fields such as energy-saving lamps, frequency converters, new energy, etc. with the structural transformation and technological progress, and the application range is getting wider and wider. The basic function of the aluminum electrolytic capacitor in the electronic circuit is generally summarized as: passing alternating current and blocking direct current, having functions of filtering, bypassing, coupling and rapid charge and discharge, and having the characteristics of small volume, large stored electricity and high cost performance. With the progress of modern technology and the continuous improvement of the capacitor performance, the electrolytic capacitor has been widely used in consumer electronic products, communication products, computers and peripheral products, new energy, automatic control, automotive industry, optoelectronic products, high-speed rail, aviation and military equipment, etc.

[0003] There is a great demand for aluminum electrolytic capacitors in terms of large capacitance. At present, generally, the stacking of multiple capacitor units is used for expansion to form a high-capacitance solid electrolytic capacitor. The known stacked solid electrolytic capacitor includes multiple capacitor units and a lead frame. Each capacitor unit includes an anode part, a cathode part and an insulating part, and the insulating part electrically insulates the anode part and the cathode part from each other, thereby constituting a large-capacity electrolytic capacitor.

[0004] However, the large-capacity capacitor of the above-mentioned prior art requires a lead frame, and each capacitor unit includes an insulating part, the capacitor structure is complex, and it is not conducive to integrated installation. Therefore, aiming at the problems existing in the current prior art, it is really necessary to conduct research and development to provide a large-capacity aluminum electrolytic capacitor with a simple structure and convenient for integrated installation.

[0005] The disclosure of the above background art content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. Without clear evidence that the above content was publicly available on the filing date of this patent application, the above background art should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0006] The purpose of the present invention is to provide a large-capacity aluminum electrolytic capacitor to solve at least one of the problems in the above background art.

[0007] To achieve the above object, the technical solution of the embodiment of the present invention is realized as follows:

[0008] An aluminum electrolytic capacitor convenient for expansion, comprising at least two aluminum electrolytic capacitor monomers, namely a first one and a second one; wherein, the structures of the first aluminum electrolytic capacitor monomer and the second aluminum electrolytic capacitor monomer are different; the first aluminum electrolytic capacitor monomer includes an aluminum shell, a core package installed inside the aluminum shell, a hollow tube, and a first cover plate and a second cover plate respectively installed at both ends of the aluminum shell, and a threaded post is arranged on the first cover plate; the second aluminum electrolytic capacitor monomer includes an aluminum shell, a core package installed inside the aluminum shell, a hollow tube, and a top cover plate and a bottom cover plate respectively installed at both ends of the aluminum shell; the top cover plate is a packaging cover plate for sealing the core package in the aluminum shell; the bottom cover plate is a connecting cover plate, and a threaded sleeve structure is arranged on the bottom cover plate; the bottom cover plate of the second aluminum electrolytic capacitor monomer is connected to the threaded post on the first cover plate of the first aluminum electrolytic capacitor monomer through the threaded sleeve.

[0009] In some embodiments, a threaded hole cooperating with the threaded post is arranged on the second cover plate.

[0010] In some embodiments, it includes a plurality of first aluminum electrolytic capacitor monomers and one second aluminum electrolytic capacitor monomer. The threaded post on the first cover plate of one first aluminum electrolytic capacitor monomer is screwed into the threaded hole of the second cover plate of another first aluminum electrolytic capacitor monomer, and the second aluminum electrolytic capacitor monomer is connected to the last first aluminum electrolytic capacitor monomer, and the first cover plate of the first aluminum electrolytic capacitor monomer is connected to the bottom cover plate of the second aluminum electrolytic capacitor.

[0011] In some embodiments, the core package includes an electrolytic paper layer, an anode foil, and a cathode foil; the electrolytic paper layer, the anode foil, and the cathode foil are configured to be wound to form a core package with a through hole in the center.

[0012] In some embodiments, the top cover plate includes a cover plate body, an outer sealing rubber ring, an inner sealing rubber ring, and an insulating sleeve; wherein, the cover plate body is provided with a hollow through hole, the cover plate body includes a bottom surface in contact with the core package and a top surface in contact with the outside, and a circular annular stop portion is arranged on the surface of the circular body between the top surface and the bottom surface.

[0013] In some embodiments, the bottom cover plate includes a bottom cover plate body, an inner sealing rubber ring pad, an outer sealing rubber ring pad, and an inner insulating ring; wherein, the bottom cover plate body is provided with a hollow through hole structure, the bottom cover plate body includes a circular base and a sleeve protruding from the circular base.

[0014] In some embodiments, the hollow through hole structure includes a threaded hole formed inside the sleeve and a first through hole and a second through hole coaxially penetrating the threaded hole.

[0015] In some embodiments, the inner diameters of the threaded hole, the first through hole, and the second through hole are different from each other, so that a first stop portion and a second stop portion are formed within the hollow through hole structure.

[0016] In some embodiments, the outer diameter of the inner sealing gasket is the same as the inner diameter of the first through hole, so that the inner sealing gasket can be placed at the position of the second stop portion; the inner diameter of the outer sealing rubber gasket is the same as the outer diameter of the sleeve, so that the outer sealing rubber gasket can be sleeved on the surface of the sleeve and placed on the annular table surface of the base.

[0017] In some embodiments, the hollow tube includes an intermediate section, annular groove sections respectively provided at both ends of the intermediate section, and crimping structures provided at both ends of the hollow tube; wherein, the intermediate section is installed in the through hole of the core package, and the annular groove sections and the crimping structures protrude from both ends of the core package.

[0018] The beneficial effects of the technical solution of the present invention are:

[0019] Compared with the prior art, the large-capacity aluminum electrolytic capacitor of the present invention realizes the connection of the aluminum electrolytic capacitor monomers conveniently through the cover plates by providing a first cover plate and a second cover plate on a single first aluminum electrolytic capacitor monomer and providing a top cover plate and a bottom cover plate on a second aluminum electrolytic capacitor monomer, thereby obtaining a large-capacity aluminum electrolytic capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a three-dimensional structure diagram of a large-capacity aluminum electrolytic capacitor according to an embodiment of the present invention;

[0022] Figure 2 It is a three-dimensional structure diagram of a capacitor monomer of a large-capacity aluminum electrolytic capacitor according to an embodiment of the present invention;

[0023] Figure 3 is Figure 2 an exploded view of the capacitor monomer;

[0024] Figure 4 is Figure 2 another exploded view of the capacitor monomer from another angle;

[0025] Figure 5 is Figure 2 a partial exploded view of the capacitor monomer;

[0026] Figure 6 is Figure 2 Exploded view of the first cover plate of the single capacitor cell;

[0027] Figure 7 is Figure 6 Another perspective view of

[0028] Figure 8 is Figure 2 Exploded view of the second cover plate of the single capacitor cell;

[0029] Figure 9 is Figure 8 Another perspective view of

[0030] Figure 10 is Figure 2 Illustration of the cooperation between the first cover plate and the second cover plate of the single capacitor cell;

[0031] Figure 11 is Figure 2 Illustration of the single capacitor cell cut along the axis;

[0032] Figure 12 is the extended connection illustration of the aluminum electrolytic capacitor that is easy to expand in an embodiment of the present invention;

[0033] Figure 13 is Figure 2 Illustration of the partial cut of the single capacitor cell;

[0034] Figure 14 is Figure 2 Illustration of the partial cut of the other end of the single capacitor cell;

[0035] Figure 15 is the exploded view of the cover plate of the single capacitor cell in another embodiment of the present invention;

[0036] Figure 16 is the exploded view of the other cover plate of the single capacitor cell in another embodiment of the present invention;

[0037] Figure 17 is the exploded view of the single capacitor cell in another embodiment of the present invention;

[0038] Figure 18 is the three-dimensional view of the single capacitor cell in another embodiment of the present invention;

[0039] Figure 19 is the three-dimensional structure illustration of the large-capacity aluminum electrolytic capacitor in another embodiment of the present invention;

[0040] Figure 20 is Figure 2 Schematic diagram of the integrated installation of the single aluminum electrolytic capacitor in the embodiment;

[0041] Figure 21 is Figure 2 Schematic diagram of another integrated installation scheme for a single aluminum electrolytic capacitor in an embodiment. Detailed implementation manners

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved in the embodiments of the present invention clearer and more understandable, and to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing or for circuit connection.

[0044] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the meaning of "a plurality" is two or more. The terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Referring to Figures 1 - 14 as shown, as a large-capacity aluminum electrolytic capacitor of the present invention, it includes at least two aluminum electrolytic capacitor monomers 100; wherein, the structures of the aluminum electrolytic capacitor monomers 100 are the same, and it includes an aluminum shell 10, a core package 20 installed in the aluminum shell 10, a hollow tube 30, and a first cover plate 40 and a second cover plate 50 respectively installed at both ends of the aluminum shell 10; wherein, the core package 20 is arranged in a hollow structure, and the hollow tube 30 is installed at the hollow position of the core 20 package; the first cover plate 40 is provided with a threaded structure, and the aluminum electrolytic capacitor is installed on the aluminum electrolytic capacitor mounting bracket through the threaded structure or the aluminum electrolytic capacitor is connected and assembled with another aluminum electrolytic capacitor through the threaded structure.

[0047] Referring to Figure 12 as shown, it can be understood that the first cover plate 40 of one of the aluminum electrolytic capacitor monomers is connected to the second cover plate 50 of another aluminum electrolytic capacitor monomer, and the first cover plate 40 of the other aluminum electrolytic capacitor monomer is connected to the second cover plate 50 of the third aluminum electrolytic capacitor monomer, so that a combination of multiple aluminum electrolytic capacitor monomers can be realized to form a large-capacity aluminum electrolytic capacitor.

[0048] The aluminum shell 10 is provided with a through hole 101 penetrating both ends, and the through hole 101 forms aluminum shell openings of the same size at both ends of the aluminum shell. Wherein, a waist constriction structure 102 is provided at a position on the outer surface of the aluminum shell close to the aluminum shell openings at both ends for fixing the core package 20; the two ends of the aluminum shell 10 are respectively subjected to a curling design to fix the first cover plate 40 and the second cover plate 50.

[0049] The core package 20 includes an electrolytic paper layer, an anode foil, and a cathode foil; the electrolytic paper layer, the anode foil, and the cathode foil are configured to be wound to form a core package 20 with a through hole 201 penetrating through the center. Core package fastening structures 202 are respectively provided at both ends of the core package 20 for fastening the wound core package 20 to prevent the electrolytic paper layer, the anode foil, and the cathode foil from spreading.

[0050] The hollow tube 30 includes an intermediate section 301, annular groove sections 302 respectively arranged at both ends of the intermediate section 301, and curling structures 303 arranged at both ends of the hollow tube. Among them, the intermediate section 301 is installed in the through hole 201 of the core package 20, and the length of the intermediate section 301 is equal to the length of the through hole 201 of the core package 20; the annular groove sections 302 and the curling structures protrude from both ends of the core package 20. The curling structures at both ends of the hollow tube 30 respectively extend into the first cover plate 40 and the second cover plate 50 to be fixedly connected to the first cover plate 40 and the second cover plate 50, so as to fixedly connect the core package 20, the first cover plate 40 and the second cover plate 50 together. It can be understood that both ends of the hollow tube 30 are circular tube openings, the core package is wound around the intermediate section 301 of the hollow tube, the first cover plate and the second cover plate are installed, and the circular tube openings at the ends of the hollow tube are curled and sealed outwards, so that the first and second cover plates can be connected through the hollow tube, and the core package is tightly fixed between the first cover plate and the second cover plate.

[0051] Refer to Figure 5 , Figure 6As shown, in some embodiments, the first cover plate 40 includes a cover plate body 401, an outer sealing ring 402, an inner sealing ring 403, and an insulating sleeve 404; wherein, the cover plate body 401 is made of metal, and in the embodiments of the present invention, the material of the cover plate body is aluminum; the cover plate body 401 is arranged in a hollow structure, which includes a circular body 4010 that cooperates with the core package 20, a threaded post 4011 protruding from the circular body, and an annular platform 4012 arranged between the threaded post 4011 and the circular body 4010; the insulating sleeve 404 includes an annular receiving space 4041 and an insulating tube 4042 protruding from the center of the insulating sleeve 404, and the annular receiving space 4041 is used to place the circular body 4010 of the cover plate body 401, and the insulating tube 4042 cooperates with the annular groove section 302 of the hollow tube 30, so as to insulate the cover plate body 401. Specifically, the hollow structure includes two through holes 4014 and 4013 with unequal apertures. An annular stop portion 4015 is formed at the connection of the large through hole 4014 and the small through hole 4013. The inner sealing ring 403 is placed on the annular stop portion 4015, and the outer diameter of the inner sealing ring 403 is adapted to the inner hole diameter of the threaded post 403; the size of the outer sealing ring 402 is the same as that of the annular body of the cover plate body, and the inner diameter of the outer sealing ring is adapted to the outer diameter of the annular platform 4012, so that the outer sealing ring is sleeved on the annular platform and keeps in close contact with the circular body. When the first cover plate 40 is installed at one end of the aluminum shell 10, one end of the aluminum shell 10 is curled inward to buckle the outer sealing ring 402, so as to seal the first cover plate 40 at one end of the aluminum shell 10. The length of the small through hole 4013 is equal to the length of the insulating tube 4042, and its aperture is adapted to the outer diameter of the insulating tube 4042; the length of the insulating tube 4042 is equal to the length of the annular groove section 302 of the hollow tube, and its aperture is adapted to the outer diameter of the annular groove section 302 of the hollow tube 30. Designed in this way, after the first cover plate 40 is installed at the end of the hollow tube 30, the annular groove section 302 of the hollow tube 30 is in close cooperation with the first cover plate 40, and by curling the end of the hollow tube outward to buckle the inner sealing ring 403 of the first cover plate 40, the cover plate and the hollow tube are firmly connected together; and through the insulating sleeve, insulation between the cover plate and the hollow tube is achieved.

[0052] Refer to Figure 7 、 Figure 8As shown, the second cover plate 50 includes a second cover plate main body 501, an inner sealing gasket 502, an outer sealing gasket 503, and an inner insulating ring 504. Among them, the second cover plate main body 501 is provided with a hollow through-hole structure. The second cover plate main body 501 includes a circular base 5010 and a sleeve 5011 protruding from the circular base. The hollow through-hole structure includes a threaded hole 5012 formed inside the sleeve 5011 and a first through-hole 5013 and a second through-hole 5014 coaxially communicating with the threaded hole 5012. Among them, the threaded hole 5012 is adapted to the threaded post 4011 on the cover plate main body 401 of the first cover plate 40, that is, the outer diameter of the threaded post 4011 on the cover plate main body 401 of the first cover plate 40 is adapted to the inner diameter of the threaded hole 5012 of the second cover plate main body 501, so that the threaded post 4011 on the cover plate main body 401 of the first cover plate 40 can be screwed into the sleeve 5011 of the second cover plate main body 501. The inner diameters of the threaded hole 5012, the first through-hole 5013, and the second through-hole 5014 are different from each other, so that a first stop portion 5015 and a second stop portion 5016 are formed in the hollow through-hole structure. The outer diameter of the sleeve 5011 of the second cover plate main body 501 is smaller than the outer diameter of the base 5010, so that an annular table surface is formed on the base 5010. A convex rib 5017 is provided on the bottom surface of the base 5010, so that when the second cover plate 50 is installed at one end of the aluminum shell 10, a certain elastic force can be generated through the convex rib 5017 to make the cover plate installation more firm. The outer diameter of the inner sealing gasket 502 is the same as the inner diameter of the first through-hole 5013, so that the inner sealing gasket 502 can be placed at the position of the second stop portion 5016. The inner diameter of the outer sealing gasket 503 is the same as the outer diameter of the sleeve 5011, so that the outer sealing gasket 503 can be sleeved on the surface of the sleeve and placed on the annular table surface of the base 5010. The inner diameter of the second through-hole 5014 is adapted to the outer diameter of the annular groove section of the hollow tube, and the inner diameter of the inner insulating ring is adapted to the outer diameter of the annular groove section of the hollow tube, so that the inner insulating ring is sleeved on one end of the annular groove section of the hollow tube close to the core package, thereby realizing the insulation of the second cover plate. Designed in this way, after the second cover plate 50 is installed at the other end of the hollow tube 30, the annular groove section 302 of the hollow tube 30 is tightly matched with the inner insulating ring 504, and by curling the end of the hollow tube 30 outward to buckle the inner sealing gasket 502 of the second cover plate 50, the cover plate and the hollow tube are firmly connected together. When the second cover plate 50 is installed at the other end of the aluminum shell 10, the other end of the aluminum shell 10 is curled inward to buckle the outer sealing gasket, so as to seal the second cover plate 50 at the other end of the aluminum shell.

[0053] Refer to Figures 1 - 12As shown, as an embodiment of the present invention, after the core package 20 is wound, the hollow tube 30 is inserted into the through hole 201 of the core package. The middle section of the hollow tube 30 is placed in the through hole of the core package. The first cover plate 40 and the second cover plate 50 are respectively installed at both ends of the hollow tube. The annular groove sections at both ends of the hollow tube 30 are respectively matched with the small through hole 4013 of the main body 401 of the first cover plate 40 and the second through hole 5014 of the main body of the second cover plate 50. The ends of the hollow tube are respectively curled outward to buckle the inner sealing ring 403 of the first cover plate and the inner sealing ring gasket 502 of the second cover plate, so as to fix the core package 20 between the first and second cover plates; install the aluminum shell 10, and waist the two ends of the aluminum shell 10 respectively to fix the core package, and then curl the two ends of the aluminum shell inward respectively to buckle the outer sealing ring 402 of the first cover plate and the outer sealing ring gasket 503 of the second cover plate, thus completing the encapsulation of the aluminum electrolytic capacitor. Wherein, one end of the aluminum electrolytic capacitor is the first cover plate 40, and the threaded post 4011 of the first cover plate protrudes from the surface of the aluminum shell. The other end of the aluminum electrolytic capacitor is the second cover plate 50, and the threaded sleeve 5012 of the second cover plate protrudes from the surface of the aluminum shell. The aluminum electrolytic capacitor of the present invention is convenient for expansion and integrated installation. Refer to Figure 9 , Figure 10 As shown, two aluminum electrolytic capacitors are taken as an example for illustration in the figure. The threaded sleeve 5011 of the second cover plate 50 of the first aluminum electrolytic capacitor is matched with the threaded post 4011 of the first cover plate 40 of the second aluminum electrolytic capacitor. The threaded post 4011 is screwed into the threaded hole 5012 of the threaded sleeve 5011, so as to connect the two aluminum electrolytic capacitors together. The embodiment of the present invention only takes the connection of two aluminum electrolytic capacitors as an example for illustration. The connection of multiple capacitors is similar and will not be elaborated here. In some embodiments, the first cover plate is the positive terminal, and the second cover plate is the negative terminal.

[0054] The main body of the aluminum electrolytic capacitor of the present invention is a ring tube structure. The positive and negative terminals of the capacitor are respectively screw and nut structures. Two capacitors of the same model can be directly screwed and butted together through their positive and negative poles to form a series structure. The number of capacitors with a limited series connection amount can be formed within the withstand voltage range of the capacitor terminal insulator. However, it should be noted that when multiple capacitors are connected in series, capacitor monomer voltage equalization management needs to be carried out. In the application of high-efficiency compact power energy stacks, through a larger-scale parallel and series connection management, it can better replace the charging and discharging work of energy storage devices such as supercapacitors and lithium batteries.

[0055] Refer to Figures 15 - 19As shown in the figure, as another embodiment of the present invention, a large-capacity aluminum electrolytic capacitor includes at least two aluminum electrolytic capacitor monomers 100 and 100'; among them, the structures of the first aluminum electrolytic capacitor monomer 100 and the second aluminum electrolytic capacitor monomer 100' are different; the first aluminum electrolytic capacitor monomer includes an aluminum shell, a core package installed in the aluminum shell, a hollow tube, and a first cover plate and a second cover plate respectively installed at both ends of the aluminum shell; among them, the core package is set as a hollow structure, and the hollow tube is installed at the hollow position of the core package; a threaded post is provided on the first cover plate, and a threaded hole matching the threaded post is provided on the second cover plate; the threaded post on the first cover plate of one first aluminum electrolytic capacitor monomer is screwed into the threaded hole of the second cover plate of another first aluminum electrolytic capacitor monomer, so that the two first aluminum electrolytic capacitor monomers can be assembled together. In the embodiment of the present invention, the first aluminum electrolytic capacitor monomer is the aluminum electrolytic capacitor monomer described in any of the foregoing Figures 1 - 14 embodiment solutions, specifically referring to Figures 1 - 14 the description, which will not be elaborated here.

[0056] Referring to Figures 15 - 18 As shown in the figure, the second aluminum electrolytic capacitor monomer 100' includes an aluminum shell 10, a core package 20 installed in the aluminum shell, a hollow tube 30, and a top cover plate 60 and a bottom cover plate 70 respectively installed at both ends of the aluminum shell; among them, the core package is set as a hollow structure, and the hollow tube is installed at the hollow position of the core package; the top cover plate 60 is a packaging cover plate for sealing the core package in the aluminum shell; the bottom cover plate 70 is a connecting cover plate, and a threaded sleeve structure is provided on the bottom cover plate, and the first single aluminum electrolytic capacitor is connected through the threaded sleeve structure to obtain a large-capacity aluminum electrolytic capacitor. Specifically, the bottom cover plate 70 of the second aluminum electrolytic capacitor monomer 100' is connected to the threaded post 4011 on the first cover plate of the first aluminum electrolytic capacitor monomer through the threaded sleeve, so as to realize the connection between the first aluminum electrolytic capacitor monomer and the second aluminum electrolytic capacitor monomer.

[0057] Referring to Figure 19 As shown in the figure, the aluminum electrolytic capacitor in the embodiment of the present invention may include a plurality of first aluminum electrolytic capacitor monomers 100 and one second aluminum electrolytic capacitor monomer 100'; among them, a plurality of first aluminum electrolytic capacitor monomers are integrally installed together, and then the last first aluminum electrolytic capacitor monomer is connected to the second aluminum electrolytic capacitor monomer, and the first cover plate 40 of the first aluminum electrolytic capacitor monomer is connected to the bottom cover plate 70 of the second aluminum electrolytic capacitor, so as to form an overall large-capacity aluminum electrolytic capacitor. It can be understood that only several exemplary descriptions are given in the embodiment of the present invention, and the present invention is not limited to these embodiments or combinations. Other combination methods that do not deviate from the gist of the present invention shall fall within the scope of the present invention.

[0058] The aluminum shell 10 is provided with a through hole 101 penetrating both ends, and aluminum shell openings of the same size are formed at both ends of the aluminum shell 10 for the through hole 101. At positions on the outer surface of the aluminum shell 10 near the aluminum shell openings at both ends, a waist structure 102 is provided for fixing the core package 20. After installing the top cover plate 60 and the bottom cover plate 70, curling is respectively performed on the aluminum shell openings at both ends, so that the top cover plate and the bottom cover plate are sealed at the aluminum shell openings at both ends, and the core package is sealed between the aluminum shell and the hollow tube.

[0059] The core package 20 includes an electrolytic paper layer, an anode foil, and a cathode foil; the electrolytic paper layer, the anode foil, and the cathode foil are configured to be wound to form a core package with a through hole 201 penetrating the center. Core package fastening structures 202 are respectively provided at both ends of the core package 20 for fastening the wound core package to prevent the electrolytic paper layer, the anode foil, and the cathode foil from spreading.

[0060] The hollow tube 30 includes an intermediate section 301, annular groove sections 302 respectively provided at both ends of the intermediate section 301, and curling structures 303 provided at both ends of the hollow tube. Among them, the intermediate section 301 is installed in the through hole 201 of the core package, and the annular groove sections 302 and the curling structures protrude from both ends of the core package. The curling structures at both ends of the hollow tube 30 respectively extend into the top cover plate 60 and the bottom cover plate 70 to be fixedly connected to the top cover plate 60 and the bottom cover plate 70, so as to fixedly connect the core package 30, the top cover plate 60, and the bottom cover plate 70 together. It can be understood that both ends of the hollow tube are circular tube openings, the core package is wound around the hollow intermediate section, the top cover plate and the second cover plate are installed, and the circular tube openings at the ends of the hollow tube are curled outward for sealing, so that the top cover plate 60 and the bottom cover plate 70 can be connected through the hollow tube, and the core package 20 is pressed and fixed between the top cover plate and the bottom cover plate.

[0061] Refer to Figure 15 、 17As shown, in some embodiments, the top cover plate 60 includes a cover plate body 601, an outer sealing rubber ring 602, an inner sealing rubber ring 603, and an insulating sleeve 604; wherein, the cover plate body 601 is made of metal, and in the embodiments of the present invention, the material of the cover plate body 601 is aluminum; the cover plate body 601 is provided with a hollow through hole, the cover plate body 601 includes a bottom surface 6010 received in the insulating sleeve 604 and a top surface 6011 in contact with the outside world. Among them, a circular annular stop portion 6012 is provided on the surface of the circular body between the top surface and the bottom surface. During installation, the annular stop portion stops at the waist position of one end of the aluminum shell 10, and the outer sealing rubber ring 602 is placed on the outer surface of the stop portion. A stop portion 6013 is provided in the hollow through hole, and the inner sealing rubber ring 603 is placed on the stop portion 6013. When the top cover plate 60 is installed at one end of the aluminum shell 10, one end of the aluminum shell 10 is curled inward to fasten the outer sealing rubber ring 602, so as to seal the top cover plate at one end of the aluminum shell. The insulating sleeve is provided with an insulating tube 6041, and the insulating tube 6041 is matched with the annular groove section 302 of the hollow tube 30. The length of the hollow through hole is equal to the length of the insulating tube, its aperture is adapted to the outer diameter of the insulating tube, and the outer diameter of the insulating tube is adapted to the outer diameter of the annular groove section 302 of the hollow tube 30. Designed in this way, after the top cover plate 60 is installed at the end of the hollow tube, the annular groove section of the hollow tube is tightly matched with the insulating tube, and by curling the end of the hollow tube outward to fasten the inner sealing rubber ring of the top cover plate, the cover plate and the hollow tube are firmly connected together, and insulation between the top cover plate and the hollow tube is achieved.

[0062] Referring to Figure 16 、 Figure 17 As shown, the bottom cover plate 70 includes a bottom cover plate body 701, an inner sealing rubber gasket 702, an outer sealing rubber gasket 703, and an inner insulating ring 704. Among them, the bottom cover plate body 701 is provided with a hollow through hole structure, the bottom cover plate body 701 includes a circular base 7010 and a sleeve 7011 protruding from the circular base 7010; the hollow through hole structure includes a threaded hole 7012 formed inside the sleeve 7011 and a first through hole and a second through hole coaxially communicating with the threaded hole 7012; wherein, the threaded hole 7012 and Figures 1 - 10The threaded post 4011 on the cover body of the first cover plate 40 in the embodiment is adapted, that is, the inner diameter of the threaded hole on the cover body 701 of the bottom cover plate 70 is adapted to the outer diameter of the threaded post 4011 of the cover body 401 of the first cover plate 40, so that the threaded post 4011 of the cover body 401 of the first cover plate 40 can be screwed into the sleeve 7011 of the bottom cover body. Among them, the inner diameters of the threaded hole, the first through hole and the second through hole are different from each other, so that a first stop portion 7013 and a second stop portion 7014 are formed in the hollow through hole structure. The outer diameter of the sleeve of the bottom cover body is smaller than the outer diameter of the base, so that an annular table surface 7015 is formed on the base. A convex rib 7016 is provided on the bottom surface of the base, so that when the bottom cover plate is installed at one end of the aluminum shell, a certain elastic force can be generated through the convex rib to make the cover plate installation more firm. The outer diameter of the inner sealing ring gasket is the same as the inner diameter of the second through hole, so that the inner sealing ring gasket 702 can be placed at the position of the first stop portion 7013; the inner diameter of the outer sealing rubber ring gasket 703 is the same as the outer diameter of the sleeve, so that the outer sealing rubber ring gasket 703 can be sleeved on the surface of the sleeve 7011 and placed on the annular table surface 7015 of the base. The inner diameter of the first through hole is adapted to the outer diameter of the annular groove section of the hollow tube, and the inner diameter of the inner insulating ring is adapted to the outer diameter of the annular groove section of the hollow tube, so that the inner insulating sleeve is sleeved on one end of the annular groove section of the hollow tube close to the core package, so as to realize the insulation of the bottom cover plate. Designed in this way, after the bottom cover plate is installed at the other end of the hollow tube, the annular groove section of the hollow tube is tightly matched with the inner insulating ring 704, and by curling the end of the hollow tube outwards to buckle the inner sealing rubber ring gasket of the bottom cover plate, the cover plate and the hollow tube are firmly connected together. When the bottom cover plate is installed at the other end of the aluminum shell, the other end of the aluminum shell is curled inwards to buckle the outer sealing rubber ring gasket, so as to seal the bottom cover plate at the other end of the aluminum shell. In some embodiments, the top cover plate is the positive terminal and the bottom cover plate is the negative terminal.

[0063] Specifically, after the winding of the core package 20 is completed, the hollow tube 30 is inserted into the through hole of the core package. The middle section of the hollow tube is placed in the through hole of the core package, and the top cover plate 60 and the bottom cover plate 70 are respectively installed at both ends of the hollow tube. The annular groove sections at both ends of the hollow tube are respectively matched with the small through holes of the main body part of the top cover plate and the second through holes of the main body part of the bottom cover plate. The ends of the hollow tube are respectively curled outwards to buckle the inner sealing rubber rings of the top cover plate and the inner sealing rubber ring pads of the bottom cover plate, so as to fix the core package between the top cover plate and the bottom cover plate; the aluminum shell is installed, and the waists are respectively tightened at both ends of the aluminum shell to fix the core package. Then, the openings of the aluminum shell at both ends are respectively curled inwards to buckle the outer sealing rubber rings of the top cover plate and the outer sealing rubber ring pads of the bottom cover plate, thus completing the encapsulation of the aluminum electrolytic capacitor. Wherein, one end of the aluminum electrolytic capacitor is the top cover plate, and the threaded post of the top cover plate protrudes from the surface of the aluminum shell. The other end of the aluminum electrolytic capacitor is the bottom cover plate, and the threaded sleeve of the bottom cover plate protrudes from the surface of the aluminum shell. The aluminum electrolytic capacitor of the present invention is convenient for expansion and integrated installation. Refer to Figure 19 、 Figure 20 as shown, Figure 19 in which, through two mounting plates 200, a plurality of aluminum electrolytic capacitor monomers 100 can be installed together to obtain a large-capacity aluminum electrolytic capacitor; Figure 20 in which, through a plurality of mounting plates 200, a plurality of aluminum electrolytic capacitor monomers 100 can be installed together to obtain a large-capacity aluminum electrolytic capacitor; and such a design is also convenient for the integrated installation of the aluminum electrolytic capacitor.

[0064] It should be noted that it is also possible to Figures 1 - 14 integrate the aluminum electrolytic capacitor in the Figures 15 - 18 embodiment with the Figures 1 - 14 aluminum electrolytic capacitor in the

[0065] embodiment to expand the aluminum electrolytic capacitor monomers. For the specific expansion, refer to the description in the Figures 1 - 14 embodiment and will not be elaborated here.

[0065] It can be understood that the above content is a further detailed description of the present invention in combination with specific / preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the creative concept of the present invention, they can also make several substitutions or modifications to these described embodiments, and these substitution or modification methods should all be regarded as belonging to the protection scope of this patent. In the description of this specification, the description referring to the terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention.

[0066] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the scope defined by the appended claims.

[0067] In addition, the scope of the present invention is not limited to the specific embodiments of the processes, machines, manufactures, compositions of matter, means, methods, and steps described in the specification. Those of ordinary skill in the art will readily understand that the above disclosures, processes, machines, manufactures, compositions of matter, means, methods, or steps currently existing or to be developed later that perform substantially the same function as or achieve substantially the same result as the corresponding embodiments described herein can be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufactures, compositions of matter, means, methods, or steps.

Claims

1. A large-capacity aluminum electrolytic capacitor, characterized in that: It includes at least a first aluminum electrolytic capacitor unit and a second aluminum electrolytic capacitor unit; wherein, the structures of the first aluminum electrolytic capacitor unit and the second aluminum electrolytic capacitor unit are different; the first aluminum electrolytic capacitor unit includes an aluminum shell, a core package installed inside the aluminum shell, a hollow tube, and a first cover plate and a second cover plate respectively installed at both ends of the aluminum shell, and a threaded post is provided on the first cover plate; the second aluminum electrolytic capacitor unit includes an aluminum shell, a core package installed inside the aluminum shell, a hollow tube, and a top cover plate and a bottom cover plate respectively installed at both ends of the aluminum shell; the top cover plate includes a cover plate body, an outer sealing rubber ring, an inner sealing rubber ring, and an insulating sleeve; the cover plate body is provided with a hollow through hole, the cover plate body includes a bottom surface in contact with the core package and a top surface in contact with the outside, wherein, a circular annular stop portion is provided on the surface of the circular body between the top surface and the bottom surface; the bottom cover plate includes a bottom cover plate body, an inner sealing rubber ring gasket, an outer sealing rubber ring gasket, and an inner insulating ring; wherein, the bottom cover plate body is provided with a hollow through hole structure, the bottom cover plate body includes a circular base and a sleeve protruding from the circular base; the top cover plate is a packaging cover plate for sealing the core package in the aluminum shell; the bottom cover plate is a connecting cover plate, and a threaded sleeve structure is provided on the bottom cover plate; the bottom cover plate of the second aluminum electrolytic capacitor unit is connected to the threaded post on the first cover plate of the first aluminum electrolytic capacitor unit through the threaded sleeve; the aluminum shell is provided with a through hole penetrating both ends, the through hole forms aluminum shell openings with the same size at both ends of the aluminum shell, and a waist structure is provided at a position on the outer surface of the aluminum shell close to the aluminum shell openings at both ends.

2. The large-capacity aluminum electrolytic capacitor according to claim 1, characterized in that: A threaded hole cooperating with the threaded post is provided on the second cover plate.

3. The large-capacity aluminum electrolytic capacitor according to claim 2, characterized in that: It includes a plurality of first aluminum electrolytic capacitor units and one second aluminum electrolytic capacitor unit, wherein the threaded post on the first cover plate of one first aluminum electrolytic capacitor unit is screwed into the threaded hole of the second cover plate of another first aluminum electrolytic capacitor unit, the last first aluminum electrolytic capacitor unit is connected to the second aluminum electrolytic capacitor unit, and the first cover plate of the first aluminum electrolytic capacitor unit is connected to the bottom cover plate of the second aluminum electrolytic capacitor.

4. The large-capacity aluminum electrolytic capacitor according to claim 3, characterized in that: The core package includes an electrolytic paper layer, an anode foil, and a cathode foil; the electrolytic paper layer, the anode foil, and the cathode foil are configured to be wound to form a core package with a through hole penetrating through the center.

5. The large-capacity aluminum electrolytic capacitor according to claim 4, wherein: The hollow through hole structure includes a threaded hole formed inside the sleeve and a first through hole and a second through hole coaxially penetrating with the threaded hole.

6. The large-capacity aluminum electrolytic capacitor according to claim 5, characterized in that: The inner diameters of the threaded hole, the first through hole, and the second through hole are different from each other, so that a first stop portion and a second stop portion are formed in the hollow through hole structure.

7. The large-capacity aluminum electrolytic capacitor according to claim 6, wherein: The outer diameter of the inner sealing rubber ring gasket is the same as the inner diameter of the first through hole, so that the inner sealing rubber ring gasket can be placed at the position of the second stop portion; the inner diameter of the outer sealing rubber ring gasket is the same as the outer diameter of the sleeve, so that the outer sealing rubber ring gasket can be sleeved on the surface of the sleeve and placed on the annular table surface of the base.

8. The high-capacity aluminum electrolytic capacitor according to claim 7, wherein: The hollow tube includes an intermediate section, annular groove sections respectively provided at both ends of the intermediate section, and crimped structures provided at both ends of the hollow tube; wherein, the intermediate section is installed in the through hole of the core pack, and the annular groove sections and the crimped structures protrude from both ends of the core pack.

Images