Aluminum electrolytic capacitor core package
By adopting the design of sheet aluminum foil and negative electrode lead-out and combined with the envelope packaging, the problems of complex structure and low core pack quality of aluminum electrolytic capacitors are solved, and a high-quality aluminum electrolytic capacitor core pack is achieved.
Patent Information
- Application Number
- CN202421948821.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The existing aluminum electrolytic capacitors have complex structures, and the winding process leads to low quality of the core pack. Once the positive electrode aluminum foil, negative electrode aluminum foil or electrolytic paper are damaged, the quality of the entire capacitor will be affected.
The structure of sheet-shaped positive electrode aluminum foil and negative electrode aluminum foil is adopted. A negative electrode lead outlet is provided on the negative electrode aluminum foil. Electrolytic paper is sandwiched between the positive electrode aluminum foil and the negative electrode aluminum foil. It is encapsulated with a film to avoid winding process.
It achieves a simple structure and high core pack quality, avoids quality problems caused by winding, and improves the overall performance of the capacitor.
Smart Images
Figure CN223155826U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of capacitors, and particularly relates to an aluminum electrolytic capacitor core package. Background Art
[0002] A capacitor is a passive device, and its main function is charging and discharging. With the continuous improvement of capacitor performance, capacitors have been widely used in consumer electronics products, communication products, computers and peripheral products, new energy, automation control, automotive industry, optoelectronic products, high-speed railways, and aviation.
[0003] Among various capacitors, compared with other types of capacitors, when of the same size, an aluminum electrolytic capacitor can achieve a larger CV value per unit area than other capacitors, can store more charge, and is cheaper, so it is widely popular.
[0004] Currently, an aluminum electrolytic capacitor generally consists of a core package formed by winding a positive aluminum foil, a negative aluminum foil, and electrolytic paper, a cylindrical aluminum shell, and a sealing cover plate with positive and negative terminal connection terminals. The cover plate is provided with positive and negative terminal lead-out holes, and the positive and negative terminals are installed on the cover plate through through holes. When in use, it is welded to the circuit board through the positive and negative terminals, so as to integrally install and fix the aluminum electrolytic capacitor on the circuit board. However, this structure of the aluminum electrolytic capacitor is complex, and the winding process is likely to result in low quality of the core package. Moreover, as long as one of the positive aluminum foil, negative aluminum foil, or electrolytic paper in the core package is damaged, the quality of the entire capacitor will be affected.
[0005] The disclosure of the above background art content is only used to assist in understanding the inventive concept and technical solution of the utility model, 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 Utility Model
[0006] The purpose of the utility model is to provide an aluminum electrolytic capacitor core package to solve at least one of the problems in the above background art.
[0007] To achieve the above purpose, the technical solution of the embodiment of the utility model is realized as follows:
[0008] An aluminum electrolytic capacitor core package includes a positive aluminum foil, a negative aluminum foil, electrolytic paper disposed between the positive aluminum foil and the negative aluminum foil, and a coating film for coating the positive aluminum foil, the negative aluminum foil, and the electrolytic paper; wherein, the negative aluminum foil includes a sheet-shaped negative plate and a negative lead-out port extending from the sheet-shaped negative plate; the sheet-shaped negative plate includes a top plate and a bottom plate, and a receiving space for placing the positive aluminum foil is formed between the top plate and the bottom plate; the negative lead-out port extends from the top plate or the bottom plate; and isolated electrolytic paper is placed between the positive aluminum foil and the negative aluminum foil.
[0009] In some embodiments, the sheet-shaped negative plate of the negative aluminum foil is rectangular, and one end of the negative lead-out port close to the sheet-shaped negative plate extends outward along the rectangular long side of the sheet-shaped negative plate.
[0010] In some embodiments, the positive aluminum foil includes a sheet-shaped positive plate and a positive lead-out port extending from the sheet-shaped positive plate.
[0011] In some embodiments, the sheet-shaped positive plate of the positive aluminum foil is rectangular, and one end of the positive lead-out port close to the sheet-shaped positive plate extends outward along the rectangular long side of the sheet-shaped positive plate.
[0012] In some embodiments, the coating film is configured to have a receiving space for accommodating the positive aluminum foil, the negative aluminum foil, and the electrolytic paper, and the height of the receiving space is approximately equal to the thickness of the positive aluminum foil or the negative aluminum foil.
[0013] In some embodiments, the thickness of the sheet-shaped positive plate of the positive aluminum foil is less than the thickness of the positive lead-out port.
[0014] In some embodiments, an opening is provided on at least one surface of the receiving space.
[0015] In some embodiments, the negative lead-out port includes a connecting portion connected to the sheet-shaped negative plate, a bending portion bent upward from the connecting portion, and an extending portion extending outward from the bending portion.
[0016] In some embodiments, the extending portion is on the same horizontal plane as the bottom plate; the height of the bending portion is approximately equal to the gap height between the top plate and the bottom plate.
[0017] In some embodiments, the thickness of the extending portion is the same as the thickness of the top plate or the bottom plate.
[0018] The beneficial effects of the technical solution of the present utility model are:
[0019] Compared with the prior art, the aluminum electrolytic capacitor core package of the present utility model has a simple structure, does not go through a winding process, and has high core package quality. Description of the Drawings
[0020] 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. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0021] Figure 1 is a schematic diagram of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention;
[0022] Figure 2 is a schematic diagram of the film wrapping of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention;
[0023] Figure 3 is an exploded schematic diagram of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention;
[0024] Figure 4 is a schematic diagram of the positive aluminum foil of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention;
[0025] Figure 5 is Figure 4 a schematic diagram of part A in
[0026] Figure 6 is a schematic diagram of the negative aluminum foil of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention;
[0027] Figure 7 is a partial schematic diagram of the negative aluminum foil of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention;
[0028] Figure 8 is a schematic diagram of the electrolytic paper of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention;
[0029] Figure 9 is a schematic diagram of the first wrapping sheet of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention;
[0030] Figure 10 is a schematic diagram of the second wrapping sheet of the core package of an aluminum electrolytic capacitor according to an embodiment of the present invention. Detailed implementation manners
[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present utility model clearer and more understandable, and to enable those skilled in the art to better understand the solutions of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0032] It should be noted that when an element is referred to as "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 "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.
[0033] 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 utility model 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 to the present utility model.
[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed 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 utility model, unless otherwise clearly specified and limited, the meaning of "a plurality" is two or more. Terms such as "installed", "connected", "connected", "fixed", 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 utility model can be understood according to specific circumstances.
[0035] Refer to Figures 1-4 、 Figures 6-10As shown in the figure, as an embodiment of the present utility model, an aluminum electrolytic capacitor core package 100 is provided, which includes a positive aluminum foil 10, a negative aluminum foil 20, an electrolytic paper 30 disposed between the positive aluminum foil 10 and the negative aluminum foil 20, and a coating film 40 for coating the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper 30; wherein, the negative aluminum foil 20 is provided with a receiving space for placing the positive aluminum foil 10, the positive aluminum foil 10 is placed in the receiving space, and an isolated electrolytic paper 30 is placed between the positive aluminum foil 10 and the negative aluminum foil 20.
[0036] Referring to Figures 3-7 As shown in the figure, the positive aluminum foil 10 includes a sheet-shaped positive electrode plate 101 and a positive electrode lead-out port 102 extending from the sheet-shaped positive electrode plate 101, and the positive electrode lead-out port 102 is integrally formed with the sheet-shaped positive electrode plate 101; the negative aluminum foil 20 includes a sheet-shaped negative electrode plate 201 and a negative electrode lead-out port 202 extending from the sheet-shaped negative electrode plate, and the negative electrode lead-out port 202 is integrally formed with the sheet-shaped negative electrode plate 201; the shape of the sheet-shaped positive electrode plate 102 is the same as the shape of the sheet-shaped negative electrode plate 202. The coating film 40 forms a receiving space for accommodating the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper 30, and the height of the receiving space is approximately equal to the thickness of the positive aluminum foil 10 or the negative aluminum foil 20; or, the height of the receiving space is approximately equal to the sum of the thicknesses of the positive aluminum foil, the negative aluminum foil, and the electrolytic paper, and the shape of the receiving space is approximately the same as the shape of the electrolytic paper 30.
[0037] Figure 4 As shown in the figure is a schematic diagram of the positive aluminum foil 10 according to an embodiment of the present utility model, wherein the sheet-shaped positive electrode plate 101 of the positive aluminum foil 10 is rectangular, and the positive electrode lead-out port 102 extends outward along the rectangular long side of the sheet-shaped positive electrode plate near one end of the sheet-shaped positive electrode plate. In some embodiments, the length of the positive electrode lead-out port 102 occupying the rectangular long side of the sheet-shaped positive electrode plate 101 does not exceed one-half of the rectangular long side. In some embodiments, the positive electrode lead-out port 102 is generally in an "I" shape. It should be noted that in some other embodiments, the positive electrode lead-out port 102 can also be of various other shapes. In some embodiments, the positive electrode lead-out port 102 can also be disposed at any position on the periphery of the sheet-shaped positive electrode plate 101.
[0038] Figure 6The figure shows a schematic diagram of the negative aluminum foil sheet 20 in an embodiment of the present utility model. Corresponding to the positive aluminum foil sheet, the sheet-shaped negative electrode plate 201 of the negative aluminum foil sheet 20 is rectangular, and the negative lead-out port 202 extends outward along the rectangular long side of the sheet-shaped negative electrode plate near one end; the negative lead-out port 202 is far from the positive lead-out port 102. When the positive aluminum foil sheet 10, the electrolytic paper 30, and the negative aluminum foil sheet 20 are stacked and combined, the positive lead-out port 102 and the negative lead-out port 202 are respectively located at both ends of the combined body, rather than overlapping. In some embodiments, the length of the rectangular long side of the negative lead-out port 202 on the sheet-shaped negative electrode does not exceed one-half of the rectangular long side. It should be noted that the negative lead-out port is generally in the shape of a "work" character. In some other embodiments, the negative lead-out port can also be in various other shapes. In some embodiments, the structure of the negative lead-out port can be the same as or different from the structure of the positive lead-out port.
[0039] Referring to Figure 5 As shown, in some embodiments, the thickness of the sheet-shaped positive electrode plate 101 of the positive aluminum foil sheet 10 is less than the thickness of the positive lead-out port 102, and height differences are formed between the upper and lower surfaces of the positive lead-out port 102 and the upper and lower surfaces of the sheet-shaped positive electrode plate 101 respectively, and the height differences are set to be equal or unequal.
[0040] Referring to Figure 6 、 Figure 7 As shown, the negative lead-out port 202 of the negative aluminum foil sheet 20 extends from the sheet-shaped negative electrode plate 201. The negative lead-out port 202 includes a connecting portion 2010 connected to the sheet-shaped negative electrode plate 201, a bending portion 2011 bent upward from the connecting portion, and an extending portion 2012 extending outward from the bending portion. In some embodiments, the sheet-shaped negative electrode plate 202 of the negative aluminum foil sheet includes a top plate 2021 and a bottom plate 2022, and the accommodating space is formed between the top plate 2021 and the bottom plate; the negative lead-out port 202 extends on the top plate 2021 or the bottom plate 2022. In some embodiments, three sides of the accommodating space are provided with openings and one side is sealed; it should be noted that in some other embodiments, the accommodating space can also be designed to have openings on at least one side. In some embodiments, the extending portion 2012 is on the same horizontal plane as the bottom plate 2022; in some embodiments, the height of the bending portion 2011 is approximately equal to the gap height between the top plate 2021 and the bottom plate 2022; in some embodiments, the extending portion 2012 is on the same horizontal plane as the top plate 2021. In some embodiments, the thickness of the extending portion 2012 is the same as the thickness of the top plate 2021 or the bottom plate 2022.
[0041] Figure 9 、Figure 10 The figure shows a schematic diagram of the coating film in an embodiment of the present utility model. The coating film 40 includes a first wrapping piece 401 and a second wrapping piece 402. Figure 5 The figure shows a schematic diagram of the first wrapping piece 401. Figure 6 The figure shows a schematic diagram of the second wrapping piece 402. The first wrapping piece 401 and the second wrapping piece 402 have the same shape. After the first wrapping piece 401 and the second wrapping piece 402 are surrounded together, the accommodation space is formed to accommodate the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper 30. Specifically, the first wrapping piece 401 and the second wrapping piece 402 are provided with a rectangular recess 400, and the size of the rectangular recess 400 is the same as the size of the electrolytic paper 30. A sealing edge 403 is formed by the outer extension around the rectangular recess 400. The rectangular recesses 400 of the first wrapping piece 401 and the second wrapping piece 402 are relatively combined together to form the accommodation space, and the sealing edges 403 on the periphery of the rectangular recess 400 are attached together to seal the accommodation space. In some embodiments, the first wrapping piece 401 and the second wrapping piece 402 are coating films, and the first wrapping piece and the second wrapping piece are surrounded to form a coating film envelope, and the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper 30 are encapsulated in the coating film envelope. In some embodiments, only one of the first wrapping piece 401 and the second wrapping piece 402 is provided with a recess 400, and the other wrapping piece is a plane. After the two wrapping pieces are attached together, the recess forms the accommodation space.
[0042] Figure 8 The figure shows a schematic diagram of the electrolytic paper in an embodiment of the present utility model. Corresponding to the positive aluminum foil and the negative aluminum foil, the shape of the electrolytic paper 30 is substantially the same as that of the sheet-shaped positive electrode plate 101 and the sheet-shaped negative electrode plate 201. In some embodiments, the shape of the electrolytic paper 30 is rectangular, and the rectangular area of the electrolytic paper 30 is greater than or equal to the rectangular area of the sheet-shaped positive electrode plate 101 and less than or equal to the rectangular area of the sheet-shaped negative electrode plate. Alternatively, the rectangular area of the electrolytic paper 30 is less than or equal to the rectangular area of the sheet-shaped positive electrode plate 101 and greater than or equal to the rectangular area of the sheet-shaped negative electrode plate.
[0043] In some embodiments, the positive aluminum foil sheet 10 and the negative aluminum foil sheet 20 may be provided in a strip shape. Corresponding to the positive aluminum foil sheet 10 and the negative aluminum foil sheet 20, the electrolytic paper 30 and the cladding 40 are also in a strip shape. Of course, in some embodiments, the positive aluminum foil sheet and the negative aluminum foil sheet may also be provided in other sheet-like rectangles, and the positive lead-out port 102 and the negative lead-out port 202 are respectively provided on the short sides of the rectangle. It should be noted that in some other embodiments, the positive aluminum foil sheet 10 and the negative aluminum foil sheet 20 may also be set into sheet-like shapes of their structures, as long as the positive plate of the positive aluminum foil sheet is the same shape as the negative plate of the negative aluminum foil sheet, and it is ensured that the edges can coincide when they overlap. It should be noted that in some other embodiments, the positive aluminum foil sheet and the negative aluminum foil sheet may also be interchanged, that is, the accommodating space is provided on the positive aluminum foil sheet, and the sheet-like negative plate of the negative aluminum foil sheet is placed in the accommodating space.
[0044] In some embodiments, the encapsulating film is made of a transparent heat-resistant material.
[0045] In some embodiments, the aluminum purity of the positive aluminum foil sheet or the negative aluminum foil sheet is ≥99.9%;
[0046] In some embodiments, the main solvent of the electrolyte is composed of ethylene glycol and deionized water.
[0047] It can be understood that the above content is a further detailed description of the creation of the present utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the creation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the creative concept of the present utility model, several alternatives or modifications can be made to these described embodiments, and these alternative or modified methods should all be regarded as belonging to the protection scope of this patent. In the description of this specification, the description with reference 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 utility model.
[0048] In this specification, the schematic descriptions 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.
[0049] In addition, the scope of the present invention is not intended to be 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, processes, machines, manufactures, compositions of matter, means, methods, or steps that are currently available or to be developed later can be utilized to perform substantially the same functions or achieve substantially the same results as the corresponding embodiments described herein. Accordingly, the appended claims are intended to include within their scope these processes, machines, manufactures, compositions of matter, means, methods, or steps.
Claims
1. An aluminum electrolytic capacitor core package, characterized in that: It includes a positive aluminum foil sheet, a negative aluminum foil sheet, an electrolytic paper disposed between the positive aluminum foil sheet and the negative aluminum foil sheet, and a coating film for coating the positive aluminum foil sheet, the negative aluminum foil sheet and the electrolytic paper; wherein, the negative aluminum foil sheet includes a sheet-shaped negative electrode plate and a negative electrode lead-out port extending from the sheet-shaped negative electrode plate; the sheet-shaped negative electrode plate includes a top plate and a bottom plate, and a receiving space for placing the positive aluminum foil sheet is formed between the top plate and the bottom plate; the negative electrode lead-out port extends from the top plate or the bottom plate; an isolated electrolytic paper is placed between the positive aluminum foil sheet and the negative aluminum foil sheet.
2. The aluminum electrolytic capacitor core package according to claim 1, characterized in that: The sheet-shaped negative electrode plate of the negative aluminum foil sheet is rectangular, and the negative electrode lead-out port extends outward along the rectangular long side of the sheet-shaped negative electrode plate near one end of the sheet-shaped negative electrode plate.
3. The aluminum electrolytic capacitor core package according to claim 2, wherein: The positive aluminum foil sheet includes a sheet-shaped positive electrode plate and a positive electrode lead-out port extending from the sheet-shaped positive electrode plate.
4. The aluminum electrolytic capacitor core package according to claim 3, characterized in that: The sheet-shaped positive electrode plate of the positive aluminum foil sheet is rectangular, and the positive electrode lead-out port extends outward along the rectangular long side of the sheet-shaped positive electrode plate near one end of the sheet-shaped positive electrode plate.
5. The aluminum electrolytic capacitor core package according to claim 3, characterized in that: The coating film is configured to have a receiving space for accommodating the positive aluminum foil sheet, the negative aluminum foil sheet and the electrolytic paper, and the height of the receiving space is approximately equal to the thickness of the positive aluminum foil sheet or the negative aluminum foil sheet.
6. The aluminum electrolytic capacitor core package according to claim 2, characterized in that: The thickness of the sheet-shaped positive electrode plate of the positive aluminum foil sheet is less than the thickness of the positive electrode lead-out port.
7. The aluminum electrolytic capacitor core package according to claim 1, characterized in that: An opening is provided on at least one surface of the receiving space.
8. The aluminum electrolytic capacitor core package according to claim 3, characterized in that: The negative electrode lead-out port includes a connecting portion connected to the sheet-shaped negative electrode plate, a bending portion bent upward from the connecting portion, and an extending portion extending outward from the bending portion.
9. The aluminum electrolytic capacitor core package according to claim 8, characterized in that, The extending portion is on the same horizontal plane as the bottom plate; the height of the bending portion is approximately equal to the gap height between the top plate and the bottom plate.
10. The aluminum electrolytic capacitor core package according to claim 9, characterized in that: The thickness of the extending portion is the same as the thickness of the top plate or the bottom plate.