A large-capacity aluminum electrolytic capacitor

Abstract

The present invention discloses a large-capacity aluminum electrolytic capacitor, which comprises at least two aluminum electrolytic capacitor monomers; the structures of the aluminum electrolytic capacitor monomers are the same, and each of them 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; wherein, the core package is arranged in a hollow structure, and the hollow tube is installed at the hollow position of the core package; the first cover plate is provided with a threaded post, and the second cover plate is provided with a threaded hole matching with the threaded post; the threaded post on the first cover plate of one aluminum electrolytic capacitor monomer is screwed into the threaded hole of the second cover plate of another aluminum electrolytic capacitor monomer, so as to assemble the two aluminum electrolytic capacitor monomers together. By providing the first cover plate and the second cover plate on a single aluminum electrolytic capacitor monomer, the connection of the aluminum electrolytic capacitor monomers can be conveniently realized through the cover plates, and a large-capacity aluminum electrolytic capacitor is obtained.

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, and new energy with the structural transformation and technological progress, and the application scope is getting wider and wider. The basic function of the aluminum electrolytic capacitor in an 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, automation control, automotive industry, optoelectronic products, high-speed railways, aviation, and military equipment, etc.

[0003] There is a great demand for large-capacity aluminum electrolytic capacitors. At present, generally, the stacking of multiple capacitor units is used for expansion to form a high-capacity 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. 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 above-mentioned large-capacity capacitor of the 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 indicating 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 creativity 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] A large-capacity aluminum electrolytic capacitor includes at least two aluminum electrolytic capacitor monomers; the structures of the aluminum electrolytic capacitor monomers are the same, and each 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; wherein, the core package is arranged in 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 aluminum electrolytic capacitor monomer is screwed into the threaded hole of the second cover plate of another aluminum electrolytic capacitor monomer, so as to assemble the two aluminum electrolytic capacitor monomers together.

[0009] In some embodiments, the first cover plate includes a cover plate body, an outer sealing ring, an inner sealing ring, and an insulating sleeve; the cover plate body is arranged in a hollow structure, and it includes a circular body matching the core package, a threaded post protruding from the circular body, and an annular platform arranged between the threaded post and the circular body.

[0010] In some embodiments, the hollow structure includes two through holes with unequal diameters, a large through hole and a small through hole, and an annular stop portion is formed at the connection of the large through hole and the small through hole. The inner sealing ring is placed on the annular stop portion, and the outer diameter of the inner sealing ring is adapted to the inner diameter of the inner hole of the threaded post.

[0011] In some embodiments, the second cover plate includes a second cover plate body, an inner sealing ring pad, an outer sealing ring pad, and an inner insulating ring; wherein, the second cover plate body is provided with a hollow through hole structure, and the second cover plate body includes a circular base and a sleeve protruding from the circular base.

[0012] 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 with the threaded hole; wherein, the threaded hole is adapted to the threaded post on the cover plate body of the first cover plate.

[0013] In some embodiments, the inner diameters of the threaded hole, the first through hole, and the second through hole are not the same, so that a first stop portion and a second stop portion are formed inside the hollow through hole structure.

[0014] In some embodiments, the outer diameter of the sleeve of the second cover plate body is smaller than the outer diameter of the base, so that an annular table surface is formed on the base.

[0015] In some embodiments, the insulating sleeve includes an annular receiving space and an insulating tube protruding from the center of the insulating sleeve. The annular receiving space is used to place the circular body of the cover plate body, and the insulating tube is matched with the annular groove section of the hollow tube, so as to realize the insulation of the cover plate body.

[0016] In some embodiments, the aluminum shell is provided with a through hole penetrating both ends, and aluminum shell openings of the same size are formed at both ends of the aluminum shell for the through hole.

[0017] 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 penetrating the center.

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

[0019] Compared with the prior art, by providing a first cover plate and a second cover plate on a single aluminum electrolytic capacitor monomer, the large-capacity aluminum electrolytic capacitor of the present invention can be conveniently expanded through the cover plates; and the integrated installation of the aluminum electrolytic capacitor is facilitated. 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 the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

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

[0022] Figure 2 It is a three-dimensional structural view 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 An exploded view of the first cover plate of the capacitor monomer;

[0027] Figure 7 Is Figure 6 Another view from another angle;

[0028] Figure 8 Is Figure 2 An exploded view of the second cover plate of the capacitor monomer;

[0029] Figure 9 is Figure 8 another perspective view;

[0030] Figure 10 is Figure 2 a diagram showing the cooperation of the first cover plate and the second cover plate of a single capacitor;

[0031] Figure 11 is Figure 2 a diagram showing a single capacitor cut along the axis;

[0032] Figure 12 is an expansion connection diagram of an aluminum electrolytic capacitor that is easy to expand according to an embodiment of the present invention;

[0033] Figure 13 is Figure 2 a diagram showing a partial cut of a single capacitor;

[0034] Figure 14 is Figure 2 a diagram showing a partial cut of the other end of a single capacitor;

[0035] Figure 15 is an exploded diagram of the cover plate of a single capacitor according to another embodiment of the present invention;

[0036] Figure 16 is an exploded diagram of another cover plate of a single capacitor according to another embodiment of the present invention;

[0037] Figure 17 is an exploded diagram of a single capacitor according to another embodiment of the present invention;

[0038] Figure 18 is a three-dimensional diagram of a single capacitor according to another embodiment of the present invention;

[0039] Figure 19 is a three-dimensional structure diagram of a large-capacity aluminum electrolytic capacitor according to another embodiment of the present invention;

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

[0041] Figure 21 is Figure 2 a schematic diagram of another integrated installation scheme of 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 by 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 in conjunction with 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection 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 a fixing function or for a circuit connection function.

[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 therefore should not be construed as a limitation of 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 quantity 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 specified 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 communication 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] Refer to Figures 1 - 14As 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. In this way, 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 the position of the outer surface of the aluminum shell near 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 disposed at both ends of the intermediate section 301, and crimping structures 303 disposed 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 crimping structures protrude from both ends of the core package 20. The crimping 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 crimped and sealed outward, so that the first and second cover plates can be connected through the hollow tube, and the core package is pressed and 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. Among them, the cover plate body 401 is made of metal. 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. 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 fasten 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 fasten 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 body 501, an inner sealing gasket 502, an outer sealing gasket 503, and an inner insulating ring 504. Among them, the second cover plate body 501 is provided with a hollow through-hole structure. The second cover plate 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 body 401 of the first cover plate 40, that is, the outer diameter of the threaded post 4011 on the cover plate body 401 of the first cover plate 40 is adapted to the inner diameter of the threaded hole 5012 of the second cover plate body 501, so that the threaded post 4011 on the cover plate body 401 of the first cover plate 40 can be screwed into the sleeve 5011 of the second cover plate 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 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 rings 403 of the first cover plate and the inner sealing ring pads 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 both ends of the aluminum shell 10 to fix the core package, and then curl both ends of the aluminum shell inward to buckle the outer sealing rings 402 of the first cover plate and the outer sealing ring pads 503 of the second cover plate, thus completing the encapsulation of the aluminum electrolytic capacitor. Among them, 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 examples 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 connected together through their positive and negative poles to form a series structure. The number of capacitors that can be connected in series can be limited 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, 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 arranged in 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, and for specific reference, see Figures 1 - 14 the description, which will not be repeated here.

[0056] Referring to Figures 15 - 18 As shown, 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 arranged in 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 packaging and 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, 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 depart 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. The through hole 101 forms aluminum shell openings of the same size at both ends of the aluminum shell 10. A waist structure 102 is provided at the position of the outer surface of the aluminum shell 10 near the aluminum shell openings at both ends for fixing the core package 20. After installing the top cover plate 60 and the bottom cover plate 70, the aluminum shell openings at both ends are respectively curled, 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 a middle section 301, annular groove sections 302 respectively provided at both ends of the middle section 301, and curling structures 303 provided at both ends of the hollow tube. Among them, the middle 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 with 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 the two ends of the hollow tube are circular pipe orifices, the core package is wound around the hollow middle section, the top cover plate and the second cover plate are installed, and the circular pipe orifices at the ends of the hollow tube are curled outwards 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. Among them, the cover plate body 601 is made of metal. 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. Among them, a circular ring-shaped stop portion 6012 is provided on the surface of the circular body between the top surface and the bottom surface. During installation, the ring-shaped 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 buckle 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 buckle 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 penetrating the threaded hole 7012. Among them, the threaded hole 7012 is connected to Figures 1 - 10The threaded posts 4011 on the cover body of the first cover plate 40 in the embodiment are adapted, that is, the inner diameter of the threaded holes on the cover body 701 of the bottom cover plate 70 is adapted to the outer diameter of the threaded posts 4011 of the cover body 401 of the first cover plate 40, so that the threaded posts 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 holes, 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 gasket is the same as the inner diameter of the second through hole, so that the inner sealing gasket 702 can be placed at the position of the first stop portion 7013; the inner diameter of the outer sealing rubber gasket 703 is the same as the outer diameter of the sleeve, so that the outer sealing rubber 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 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 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 core package 20 is wound, 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 outward 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; install the aluminum shell, and perform waist constriction at both ends of the aluminum shell to fix the core package. Then, the aluminum shell openings at both ends of the aluminum shell are respectively curled inward 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. Among them, 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 high-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 high-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 aluminum electrolytic capacitor in Figures 1 - 14 to expand the aluminum electrolytic capacitor monomers. For the specific expansion, refer to the description in the

[0065] embodiment, which will not be elaborated here.

[0066] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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-disclosed, presently existing, or later-developed processes, machines, manufactures, compositions of matter, means, methods, or steps that perform substantially the same function 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: Comprising at least two aluminum electrolytic capacitor monomers; the structures of the aluminum electrolytic capacitor monomers are the same, and each 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; wherein, the aluminum shell is provided with a through hole penetrating both ends, and the through hole forms aluminum shell openings of the same size at both ends of the aluminum shell, and the two ends of the aluminum shell are respectively subjected to a curling design to fix the first cover plate and the second cover plate; the first cover plate includes a cover plate body, an outer sealing ring, an inner sealing ring, and an insulating sleeve; the cover plate body is arranged in a hollow structure, which includes a circular body matching with the core package, a threaded post protruding from the circular body, and an annular platform arranged between the threaded post and the circular body; the second cover plate includes a second cover plate body, an inner sealing ring pad, an outer sealing ring pad, and an inner insulating ring; wherein, the second cover plate body is provided with a hollow through hole structure, and the second cover plate body includes a circular base and a sleeve protruding from the circular base; the core package is arranged in a hollow structure, and the hollow tube is installed at the hollow position of the core package; a threaded post is arranged on the first cover plate, and a threaded hole matching with the threaded post is arranged on the second cover plate; the threaded post on the first cover plate of one aluminum electrolytic capacitor monomer is screwed into the threaded hole of the second cover plate of another aluminum electrolytic capacitor monomer, so as to assemble the two aluminum electrolytic capacitor monomers together.

2. The large-capacity aluminum electrolytic capacitor according to claim 1, characterized in that: The hollow structure includes two through holes with unequal apertures, a large through hole and a small through hole, and an annular stop portion is formed at the connection of the large through hole and the small through hole, and the inner sealing ring is placed at the annular stop portion, and the outer diameter of the inner sealing ring is adapted to the inner diameter of the inner hole of the threaded post.

3. The large-capacity aluminum electrolytic capacitor according to claim 2, characterized in that: 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; wherein, the threaded hole is adapted to the threaded post on the cover plate body of the first cover plate.

4. The large-capacity aluminum electrolytic capacitor according to claim 3, 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 as to form a first stop portion and a second stop portion inside the hollow through hole structure.

5. The large-capacity aluminum electrolytic capacitor according to claim 4, characterized in that: The outer diameter of the sleeve of the second cover plate body is smaller than the outer diameter of the base, so as to form an annular table surface on the base.

6. The large-capacity aluminum electrolytic capacitor according to claim 5, characterized in that: The insulating sleeve includes an annular receiving space and an insulating tube protruding from the center of the insulating sleeve, and the annular receiving space is used to place the circular body of the cover plate body, and the insulating tube is matched with the annular groove section of the hollow tube, so as to realize the insulation of the cover plate body.

7. The large-capacity aluminum electrolytic capacitor according to claim 6, characterized in that: A waist constriction structure is arranged at the position of the outer surface of the aluminum shell close to the aluminum shell openings at both ends for fixing the core package.

8. The large-capacity aluminum electrolytic capacitor according to claim 7, 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.

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