Sheet type aluminum electrolytic capacitor single body packaged by film

Abstract

The utility model discloses a chip type aluminum electrolytic capacitor single body packaged by a coating film, which comprises an anode aluminum foil sheet, a cathode aluminum foil sheet, electrolytic paper arranged between the anode aluminum foil sheet and the cathode aluminum foil sheet, and the coating film used for packaging the anode aluminum foil sheet, the cathode aluminum foil sheet and the electrolytic paper, wherein a containing space for containing the positive electrode aluminum foil, the negative electrode aluminum foil and the electrolytic paper is formed in the wrapping film, and the height of the containing space is approximately equal to the thickness of the negative electrode aluminum foil or approximately equal to the sum of the thickness of the positive electrode aluminum foil, the thickness of the negative electrode aluminum foil and the thickness of the electrolytic paper. And the shape of the accommodating space is roughly the same as that of the electrolytic paper. According to the utility model, the positive electrode aluminum foil, the negative electrode aluminum foil and the electrolytic paper are packaged together through the envelope, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitors, and particularly relates to a chip aluminum electrolytic capacitor monomer with film encapsulation. Background Art

[0002] A capacitor is a passive device, and its main function is to charge and discharge. 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, aviation, and military equipment and other fields.

[0003] Among various capacitors, compared with other types of capacitors, when the size is the same, the aluminum electrolytic capacitor can obtain a larger CV value per unit area than other capacitors, can store more charges, and is cheaper in price, so it is widely popular.

[0004] At present, 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, the aluminum electrolytic capacitor is integrally installed and fixed on the circuit board by welding the positive and negative terminals to 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 a chip aluminum electrolytic capacitor monomer with film encapsulation 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 utility model is realized as follows:

[0008] A single-chip aluminum electrolytic capacitor encapsulated with a film, comprising a positive aluminum foil sheet, a negative aluminum foil sheet, electrolytic paper disposed between the positive aluminum foil sheet and the negative aluminum foil sheet, and a film for encapsulating the positive aluminum foil sheet, the negative aluminum foil sheet, and the electrolytic paper; wherein, the film forms a receiving space for receiving the positive aluminum foil sheet, the negative aluminum foil sheet, and the electrolytic paper, the height of the receiving space is approximately equal to the thickness of the negative aluminum foil sheet or approximately equal to the sum of the thicknesses of the positive aluminum foil sheet, the negative aluminum foil sheet, and the electrolytic paper, and the shape of the receiving space is substantially the same as the shape of the electrolytic paper.

[0009] In some embodiments, the film comprises a first wrapping sheet and a second wrapping sheet, the first wrapping sheet and the second wrapping sheet have the same shape, and the receiving space is formed after the first wrapping sheet and the second wrapping sheet are enclosed together.

[0010] In some embodiments, the first wrapping sheet and the second wrapping sheet are provided with rectangular recesses, and the size of the rectangular recesses is the same as the size of the electrolytic paper.

[0011] In some embodiments, a sealing edge is formed by extending the periphery of the rectangular recess, the rectangular recesses of the first wrapping sheet and the second wrapping sheet are relatively combined together, and the sealing edges on the periphery of the rectangular recesses are attached together to form the receiving space.

[0012] In some embodiments, one of the first wrapping sheet and the second wrapping sheet is provided with a recess, and the other wrapping sheet is a plane, and the two wrapping sheets are attached together to form the receiving space.

[0013] In some embodiments, a raised edge is formed on the periphery of the recess of the first wrapping sheet and / or the second wrapping sheet, and the raised edge and the sealing edge are in different planes.

[0014] In some embodiments, the raised edge is higher than the sealing edge.

[0015] In some embodiments, nano-scale holes are formed on the surface of the negative aluminum foil sheet; the film is made of a transparent heat-resistant material.

[0016] In some embodiments, the positive aluminum foil sheet comprises a sheet-shaped positive electrode plate and a positive electrode lead-out port extending from the sheet-shaped positive electrode plate, and the positive electrode lead-out port is integrally formed with the sheet-shaped positive electrode plate.

[0017] In some embodiments, the negative aluminum foil sheet comprises a sheet-shaped negative electrode plate and a negative electrode lead-out port extending from the sheet-shaped negative electrode plate, and the negative electrode lead-out port is integrally formed with the sheet-shaped negative electrode plate.

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

[0019] Compared with the prior art, the single-chip aluminum electrolytic capacitor encapsulated by film of the present utility model encapsulates the positive aluminum foil, the negative aluminum foil and the electrolytic paper together through the film, with simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model 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 utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a schematic diagram of a single-chip aluminum electrolytic capacitor encapsulated by film according to an embodiment of the present utility model;

[0022] Figure 2 is a schematic diagram of the positive aluminum foil of a single-chip aluminum electrolytic capacitor encapsulated by film according to an embodiment of the present utility model;

[0023] Figure 3 is a schematic diagram of the negative aluminum foil of a single-chip aluminum electrolytic capacitor encapsulated by film according to an embodiment of the present utility model;

[0024] Figure 4 is a schematic diagram of the electrolytic paper of a single-chip aluminum electrolytic capacitor encapsulated by film according to an embodiment of the present utility model;

[0025] Figure 5 is a schematic diagram of the first wrapping sheet of a single-chip aluminum electrolytic capacitor encapsulated by film according to an embodiment of the present utility model;

[0026] Figure 6 is a schematic diagram of the second wrapping sheet of a single-chip aluminum electrolytic capacitor encapsulated by film according to an embodiment of the present utility model;

[0027] Figure 7 is a partial schematic diagram of the film of a single-chip aluminum electrolytic capacitor encapsulated by film according to an embodiment of the present utility model;

[0028] Figure 8 is Figure 7 a schematic diagram of part A in;

[0029] Figure 9 is another partial schematic diagram of the film of a single-chip aluminum electrolytic capacitor encapsulated by film according to an embodiment of the present utility model;

[0030] Figure 10 is Figure 9 a schematic diagram of part B in. DETAILED DESCRIPTION OF THE EMBODIMENTS

[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 the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making 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 a fixing function or for a circuit connection function.

[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 thus cannot be construed as a limitation on 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 defined and limited, the meaning of "a plurality of" is two or more. Terms such as "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 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 utility model can be understood according to specific circumstances.

[0035] Refer to Figures 1 - 6As shown, as an embodiment of the present utility model, a single-chip aluminum electrolytic capacitor 100 with film encapsulation 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 film 40 for encapsulating the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper 30; wherein, the film 40 forms an accommodation space for accommodating the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper, and the height of the accommodation space is approximately equal to the thickness of the negative aluminum foil or approximately equal to the sum of the thicknesses of the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper 30, and the shape of the accommodation space is substantially the same as the shape of the electrolytic paper 30.

[0036] Please refer to Figures 5 - 10 as shown, wherein Figure 5 、 6 As shown in the figure, it is a schematic diagram of the film 40 of an embodiment of the present utility model. The film 40 includes a first wrapping piece 401 and a second wrapping piece 402. Figure 5 As shown in the figure, it is a schematic diagram of the first wrapping piece. Figure 6 As shown in the figure, it is a schematic diagram of the second wrapping piece; 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 rectangular recesses 400, and the size of the rectangular recesses 400 is the same as the size of the electrolytic paper 30; a sealing edge 403 extends outward from the periphery of the rectangular recesses 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 recesses 400 are attached together to seal the accommodation space. In some embodiments, the first wrapping piece 401 and the second wrapping piece 402 are films, and the first wrapping piece 401 and the second wrapping piece 402 are surrounded to form a film envelope, and the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper 30 are encapsulated in the film envelope. In some embodiments, only one of the first wrapping piece 401 and the second wrapping piece 402 is provided with a recess, and the other wrapping piece is a plane. After the two wrapping pieces are attached together, the recess forms the accommodation space.

[0037] Refer to Figure 1 、 Figure 2As shown in the figure, the positive aluminum foil sheet 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. The positive electrode lead-out port 102 is integrally formed with the sheet-shaped positive electrode plate 101. The negative aluminum foil sheet 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 201. 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 101 is the same as that of the sheet-shaped negative electrode plate 201.

[0038] Figure 2 As shown in the figure, it is a schematic diagram of the positive aluminum foil sheet 10 according to an embodiment of the present invention. Among them, the sheet-shaped positive electrode plate 101 of the positive aluminum foil sheet 10 is rectangular, and one end of the positive electrode lead-out port 102 close to the sheet-shaped positive electrode plate extends outward along the rectangular long side 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 does not exceed one-half of the rectangular long side. In some embodiments, the positive electrode lead-out port is generally in the shape of a "worker". It should be noted that in some other embodiments, the positive electrode lead-out port 102 can also be in various other shapes. In some embodiments, the positive electrode lead-out port 102 can also be provided at any position on the periphery of the sheet-shaped positive electrode plate.

[0039] Figure 3 As shown in the figure, it is a schematic diagram of the negative aluminum foil sheet 20 according to an embodiment of the present invention. Corresponding to the positive aluminum foil sheet 10, the sheet-shaped negative electrode plate 201 of the negative aluminum foil sheet 20 is rectangular, and one end of the negative electrode lead-out port 202 close to the sheet-shaped negative electrode plate 201 extends outward along the rectangular long side of the sheet-shaped negative electrode plate. The negative electrode lead-out port 202 is far from the positive electrode lead-out port 102. When the positive aluminum foil sheet 10, the electrolytic paper 30, and the negative aluminum foil sheet 20 are laminated together, the positive electrode lead-out port 102 and the negative electrode lead-out port 202 are respectively located at both ends of the combination, rather than overlapping. In some embodiments, the length of the negative electrode lead-out port 202 occupying the rectangular long side of the sheet-shaped negative electrode plate does not exceed one-half of the rectangular long side. It should be noted that the negative electrode lead-out port 202 is generally in the shape of a "worker". In some other embodiments, the negative electrode lead-out port 202 can also be in various other shapes. In some embodiments, the structure of the negative electrode lead-out port 202 can be the same as or different from the structure of the positive electrode lead-out port 102.

[0040] Figure 4The figure shows a schematic diagram of an electrolytic paper 30 according to an embodiment of the present utility model. Corresponding to the positive aluminum foil sheet and the negative aluminum foil sheet, 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 102 or greater than or equal to the rectangular area of the sheet-shaped negative electrode plate 202.

[0041] In some embodiments, the positive aluminum foil sheet 10 and the negative aluminum foil sheet 20 can be arranged 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 encapsulation film 40 are also in a strip shape. Of course, in some embodiments, the positive aluminum foil sheet 10 and the negative aluminum foil sheet 20 can also be arranged in other sheet-shaped rectangles, and the positive electrode lead-out port 102 and the negative electrode lead-out port 202 are respectively arranged on the short sides of the rectangle. It should be noted that in some other embodiments, the positive aluminum foil sheet and the negative aluminum foil sheet can also be arranged in a sheet shape of their structures, as long as the positive electrode plate of the positive aluminum foil sheet is consistent with the negative electrode plate of the negative aluminum foil sheet, and it is ensured that the edges can coincide when they overlap.

[0042] In some embodiments, the positive aluminum foil sheet is configured to be formed by masking and leaving a margin on the electronic aluminum foil. Specifically, after masking and leaving a margin on the electronic aluminum foil, the surface area is corroded by acid and alkali solution, and an electrochemical reaction is carried out to generate a surface oxide film. Then, the mask is removed to form a locally blank positive electrode lead-out port.

[0043] In some embodiments, the positive aluminum foil sheet starts to be masked and etched to form the surface area from the corrosion stage, and an electrochemical reaction is carried out to generate a surface oxide film. After the non-masked surface of the aluminum foil is subjected to the formation process, the mask is removed by high-temperature baking to expose the margin, and then re-rapid formation is carried out to achieve full-surface voltage formation. It is also possible not to remove the mask. When making later, the mask at a specific position is removed by laser to form a locally blank positive electrode lead-out port.

[0044] Refer to Figure 9 、 Figure 10 As shown, in some embodiments, a raised edge 404 is formed on the periphery of the recessed part of the first wrapping sheet 401 and / or the second wrapping sheet 402, and the raised edge 404 and the sealing edge 403 are in different planes; in some embodiments, the raised edge 404 protrudes above the sealing edge 403.

[0045] In some embodiments, nano-scale holes are formed on the surface of the negative aluminum foil sheet;

[0046] In some embodiments, the encapsulation film is made of a transparent heat-resistant material.

[0047] In some embodiments, the aluminum purity of the electronic aluminum foil is ≥99.9%.

[0048] It is 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 limited only to these descriptions. For those of ordinary skill in the technical field to which the creation of the present utility model pertains, without departing from the creative concept of the present utility model, 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 with reference to terms such as "one embodiment", "some embodiments", "preferred embodiment", "example", "specific example", or "some examples" 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.

[0049] In this specification, the illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can 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 creation of the present utility model 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.

[0050] In addition, the scope of the creation of the present utility model 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 disclosures, processes, machines, manufactures, compositions of matter, means, methods, or steps that currently exist or will be developed later can be utilized to perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results as the embodiments described herein. Therefore, the appended claims are intended to include these processes, machines, manufactures, compositions of matter, means, methods, or steps within their scope.

Claims

1. A film-encapsulated chip-type aluminum electrolytic capacitor monomer, characterized in that: It comprises a positive aluminum foil sheet, a negative aluminum foil sheet, an electrolytic paper arranged between the positive aluminum foil sheet and the negative aluminum foil sheet, and a film for encapsulating the positive aluminum foil sheet, the negative aluminum foil sheet and the electrolytic paper; wherein the film forms a accommodating space for accommodating the positive aluminum foil sheet, the negative aluminum foil sheet and the electrolytic paper, the height of the accommodating space is approximately equal to the thickness of the negative aluminum foil sheet or approximately equal to the sum of the thicknesses of the positive aluminum foil sheet, the negative aluminum foil sheet and the electrolytic paper, and the shape of the accommodating space is approximately the same as the shape of the electrolytic paper.

2. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 1, characterized in that: The packaging film includes a first packaging sheet and a second packaging sheet. The first packaging sheet and the second packaging sheet have the same shape. The first packaging sheet and the second packaging sheet are combined together to form the accommodating space.

3. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 2, characterized in that: The first package sheet and the second package sheet are provided with rectangular recessed parts, and the size of the rectangular recessed parts is consistent with the size of the electrolytic paper.

4. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 3, characterized in that: The rectangular recessed portion is extended to form a sealing edge on all sides, and the rectangular recessed portions of the first package sheet and the second package sheet are relatively combined together, and the sealing edges of the peripheral edges of the rectangular recessed portions are attached together to form the accommodating space.

5. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 2, characterized in that: One of the first wrapping sheet and the second wrapping sheet is provided with a recessed portion, while the other wrapping sheet is a flat surface, and the two wrapping sheets are attached together to form the accommodating space.

6. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 4, characterized in that: A raised edge is formed on the periphery of the recessed portion of the first wrapping sheet and / or the second wrapping sheet, and the raised edge and the sealing edge are in different planes.

7. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 6, characterized in that: The raised edge is higher than the sealing edge.

8. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 4, characterized in that: Nano-scale holes are formed on the surface of the negative electrode aluminum foil; and the envelope is made of a transparent temperature-resistant material.

9. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 1, characterized in that: The positive electrode 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, and the positive electrode lead-out port is integrally formed with the sheet-shaped positive electrode plate.

10. The film-encapsulated chip-type aluminum electrolytic capacitor monomer according to claim 1, characterized in that: The negative electrode 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, and the negative electrode lead-out port is integrally formed with the sheet-shaped negative electrode plate.

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