Chip laminated aluminum electrolytic capacitor

Abstract

The utility model discloses a chip type laminated aluminum electrolytic capacitor, which comprises a shell, a plurality of capacitor monomers and a cover plate, wherein the capacitor monomers are arranged in the shell in a laminated manner; the cover plate is used for packaging the capacitor monomers in the shell; wherein the cover plate is provided with an anode leading-out terminal and a cathode leading-out terminal; the capacitor monomers are sheet-shaped, each capacitor monomer is respectively provided with a positive electrode lead-out port and a negative electrode lead-out port, the positive electrode lead-out ports and the negative electrode lead-out ports are respectively arranged at two ends of the capacitor monomers, the plurality of capacitor monomers are stacked together, and the positive electrode lead-out ports and the negative electrode lead-out ports of the capacitor monomers are respectively gathered together. And the positive electrode leading-out terminal and the negative electrode leading-out terminal are led out through the guide connecting sheet and are respectively connected to the cover plate. The chip-type laminated aluminum electrolytic capacitor is simple in structure, high in performance and quality, convenient for subsequent maintenance and long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitors, and particularly relates to a chip multi-layer aluminum electrolytic capacitor. Background Technique

[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, automatic 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, 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 kind of aluminum electrolytic capacitor has a complex structure, 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 technical 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 technology 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 multi-layer aluminum electrolytic capacitor to solve at least one of the problems in the above background technology.

[0007] To achieve the above purpose, the technical solution of the embodiment of the utility model is realized as follows:

[0008] A chip multilayer aluminum electrolytic capacitor includes a housing, a plurality of capacitor units stacked in the housing, and a cover plate for encapsulating the plurality of capacitor units in the housing; wherein, a positive lead terminal and a negative lead terminal are installed on the cover plate; the capacitor units are in sheet form, each capacitor unit is respectively provided with a positive lead outlet and a negative lead outlet, the positive lead outlet and the negative lead outlet are respectively arranged at both ends of the capacitor unit, a plurality of capacitor units are stacked together, the positive lead outlets and the negative lead outlets of the capacitor units are respectively gathered together, led out through a connecting piece and respectively connected to the positive lead terminal and the negative lead terminal on the cover plate.

[0009] In some embodiments, the positive lead outlets of the plurality of capacitor units are gathered together through cell terminals, the cell terminals are directly connected to the connecting piece, and are connected to the positive lead terminal through the connecting piece.

[0010] In some embodiments, the cell terminals include a plurality of terminal pieces, and each terminal piece independently connects to the positive lead outlet or the negative lead outlet of a capacitor unit.

[0011] In some embodiments, the connecting piece includes a main body portion in contact with the cell terminal and a connecting portion in contact with the positive lead terminal or the negative lead terminal.

[0012] In some embodiments, the plurality of terminal pieces of the cell terminals are independent of each other, and there are gaps between the terminal pieces.

[0013] In some embodiments, the capacitor unit includes 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 cladding for covering the positive aluminum foil sheet, the negative aluminum foil sheet and the electrolytic paper therein.

[0014] In some embodiments, the positive aluminum foil sheet includes a sheet-shaped positive electrode plate, and the positive lead outlet extends from the sheet-shaped positive electrode plate; the negative aluminum foil sheet includes a sheet-shaped negative electrode plate, and the negative lead outlet extends from the sheet-shaped negative electrode plate.

[0015] In some embodiments, the positive lead outlet is integrally formed with the sheet-shaped positive electrode plate; the negative lead outlet is integrally formed with the sheet-shaped negative electrode plate.

[0016] In some embodiments, the sheet-shaped positive electrode plate of the positive aluminum foil sheet is rectangular, and the positive lead outlet extends outward along the rectangular long side of the sheet-shaped positive electrode plate near one end of the sheet-shaped positive electrode plate.

[0017] In some embodiments, the sheet-shaped negative electrode plate of the negative aluminum foil sheet is rectangular, and the negative lead outlet extends outward along the rectangular long side of the sheet-shaped negative electrode plate near one end of the sheet-shaped negative electrode plate.

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

[0019] Compared with the prior art, the manufacturing process of the chip multi-layer aluminum electrolytic capacitor of the present utility model is simple, the quality is high, it is convenient for subsequent maintenance, and the service life is long. 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, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a three-dimensional schematic diagram of a chip aluminum electrolytic capacitor according to an embodiment of the present invention;

[0022] Figure 2 is an exploded schematic diagram of a part of a chip aluminum electrolytic capacitor according to an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the core terminal of a chip aluminum electrolytic capacitor according to an embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of a capacitor unit of a chip aluminum electrolytic capacitor according to an embodiment of the present invention;

[0025] Figure 5 is Figure 4 a schematic diagram of the positive aluminum foil of the capacitor unit;

[0026] Figure 6 is Figure 4 a schematic diagram of the negative aluminum foil of the capacitor unit;

[0027] Figure 7 is Figure 4 a schematic diagram of the electrolytic paper of the capacitor unit;

[0028] Figure 8 is Figure 4 a schematic diagram of the first wrapper of the capacitor unit cladding;

[0029] Figure 9 is Figure 4 a schematic diagram of the second wrapper of the capacitor unit cladding. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] 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.

[0031] 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 an electrical connection function.

[0032] 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 should not be construed as a limitation to the present utility model.

[0033] 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 specifying 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" is two or more. The terms "mounted", "connected", "connected to", "fixed" and other terms 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.

[0034] Refer to Figures 1-6As shown in the figure, as an embodiment of the present utility model, a chip multi-layer aluminum electrolytic capacitor 200 is provided, which includes a housing 21, a plurality of capacitor monomers 100 stacked in the housing 21, and a cover plate 22 for encapsulating the plurality of capacitor monomers 100 in the housing 21. Among them, a positive electrode lead-out terminal 220 and a negative electrode lead-out terminal 221 are installed on the cover plate 22. The capacitor monomer 100 is in a sheet shape, and each capacitor monomer 100 is respectively provided with a positive electrode lead-out port 102 and a negative electrode lead-out port 202. The positive electrode lead-out port 102 and the negative electrode lead-out port 202 are respectively arranged at both ends of the capacitor monomer 100. A plurality of capacitor monomers 100 are stacked together, and the positive electrode lead-out ports 102 and the negative electrode lead-out ports 202 of the capacitor monomers 100 are respectively gathered together, and are led out through a conducting sheet 23 and respectively connected to the positive electrode lead-out terminal 220 and the negative electrode lead-out terminal 221 on the cover plate 22.

[0035] Referring to Figures 2-4 As shown in the figure, specifically, the positive electrode lead-out ports 102 of a plurality of capacitor monomers 100 are gathered together through a cell terminal 24. The cell terminal 24 is directly connected to the conducting sheet 23 and is connected to the positive electrode lead-out terminal 220 through the conducting sheet 23. Correspondingly, the negative electrode lead-out ports 202 of a plurality of capacitor monomers are gathered together through the cell terminal 24. The cell terminal 24 is directly connected to the conducting sheet 23 and is connected to the negative electrode lead-out terminal 221 through the conducting sheet 23.

[0036] In some embodiments, the cell terminal 24 includes a plurality of terminal pieces 240, and each terminal piece 240 is independently connected to the positive electrode lead-out port 102 or the negative electrode lead-out port 202 of a capacitor monomer 100. In some embodiments, the plurality of terminal pieces 240 of the cell terminal 24 are independent of each other, and there are gaps between the terminal pieces 240.

[0037] In some embodiments, the conducting sheet 23 includes a main body portion 230 in contact with the cell terminal 24 and a conducting portion 231 in contact with the positive electrode lead-out terminal 220 or the negative electrode lead-out terminal 221. In some embodiments, the main body portion 230 is arranged as a sheet-shaped plane, and the conducting portion 231 is bent and extended from the main body portion 230. The area of the conducting portion 231 is less than or equal to the area of the main body portion 230.

[0038] Referring to Figures 4-9As shown, in some embodiments, the capacitor unit 100 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 cladding 40 that wraps the positive aluminum foil 10, the negative aluminum foil 20, and the electrolytic paper 30 therein; wherein, 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 201, 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 101 is the same as the shape of the sheet-shaped negative electrode plate 201. In some embodiments, the sheet-shaped positive electrode plate 101 and the sheet-shaped negative electrode plate 201 are provided in a thin sheet shape.

[0039] Figure 5 As shown is a schematic diagram of the positive aluminum foil 10 according to an embodiment of the present invention. Among them, the sheet-shaped positive electrode plate 101 of the positive aluminum foil is rectangular, and one end of the positive electrode lead-out port 102 close to the sheet-shaped positive electrode plate 101 extends outward along the rectangular long side of the sheet-shaped positive electrode plate 101. 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 102 does not exceed one-half of the total length 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 provided at any position on the periphery of the sheet-shaped positive electrode plate 101.

[0040] Figure 6 As shown is a schematic diagram of the negative aluminum foil 20 according to an embodiment of the present invention. Corresponding to the positive aluminum foil 10, the sheet-shaped negative electrode plate 201 of the negative aluminum foil 20 is rectangular, and one end of the negative electrode lead-out port 202 close to the sheet-shaped negative electrode plate 20 extends outward along the rectangular long side of the sheet-shaped negative electrode plate 201; the negative electrode lead-out port 202 is away from the positive electrode lead-out port 102. When the positive aluminum foil 10, the electrolytic paper 30, and the negative aluminum foil 20 are stacked and combined 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 total length of the rectangular long side. It should be noted that the negative electrode lead-out port 202 is generally in an "I" shape. In some other embodiments, the negative electrode lead-out port 202 can also be of various other shapes. In some embodiments, the structure of the negative electrode lead-out port 202 and the structure of the positive electrode lead-out port 102 can be the same or different.

[0041] In some embodiments, the shape of the sheet-shaped positive electrode plate 101 of the positive electrode aluminum foil sheet 10 is the same as that of the sheet-shaped negative electrode plate 201 of the negative electrode aluminum foil sheet 20, and the size of the sheet-shaped positive electrode plate 101 of the positive electrode aluminum foil sheet 10 is less than or equal to the size of the sheet-shaped negative electrode plate 201 of the negative electrode aluminum foil sheet 20.

[0042] Figure 7 The figure shows a schematic diagram of the electrolytic paper 30 according to an embodiment of the present invention. Corresponding to the positive electrode aluminum foil sheet 10 and the negative electrode aluminum foil sheet 20, the shape of the electrolytic paper 30 is substantially the same as that of the sheet-shaped positive electrode plate 10 and the sheet-shaped negative electrode plate 20; 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 or less than or equal to the rectangular area of the sheet-shaped negative electrode plate.

[0043] Figure 8 、 Figure 9 The figure shows a schematic diagram of the cladding 40 according to an embodiment of the present invention. The cladding 40 includes a first cladding sheet 401 and a second cladding sheet 402. Figure 5 The figure shows a schematic diagram of the first cladding sheet 401. Figure 6 The figure shows a schematic diagram of the second cladding sheet 402; the first cladding sheet 401 and the second cladding sheet 402 have the same shape. After the first cladding sheet 401 and the second cladding sheet 402 are enclosed together, a receiving space is formed to accommodate the positive electrode aluminum foil sheet 10, the negative electrode aluminum foil sheet 20, and the electrolytic paper 30. Specifically, the first cladding sheet and the second cladding sheet are provided with a rectangular recess 400, and the size of the rectangular recess 400 is equal to the size of the electrolytic paper 30; a sealing edge 403 is formed on the outer extension of the four sides of the rectangular recess 400. The rectangular recesses 400 of the first cladding sheet 401 and the second cladding sheet 402 are combined relatively to form the receiving space, and the sealing edges 403 on the periphery of the rectangular recess 400 are attached together to seal the receiving space. In some embodiments, the first cladding sheet 401 and the second cladding sheet 402 are packaging films, and the first cladding sheet 401 and the second cladding sheet 402 are enclosed to form a packaging film envelope, and the positive electrode aluminum foil sheet 10, the negative electrode aluminum foil sheet 20, and the electrolytic paper 30 are encapsulated in the packaging film envelope.

[0044] In some embodiments, the positive electrode aluminum foil sheet 10 and the negative electrode aluminum foil sheet 20 can be provided in a strip shape. Corresponding to the positive electrode aluminum foil sheet 10 and the negative electrode aluminum foil sheet 20, the electrolytic paper 30 and the cladding 40 are also in a strip shape. Of course, in some embodiments, such as Figure 7 、 Figure 8As shown, the positive aluminum foil sheet 10 and the negative aluminum foil sheet 20 can also be set in other sheet-like rectangles, and the positive lead-out port 102 and the negative 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 set into sheet-like shapes of their structures, as long as the positive plate of the positive aluminum foil sheet and the negative plate of the negative aluminum foil sheet have the same shape and ensure that the edges can coincide when they overlap.

[0045] In some embodiments, the chip aluminum electrolytic capacitor 200 is in a flat rectangular shape, the housing 21 is a metal housing, the cover plate 22 is a metal cover plate, and a cover plate insulating sheet 25 is arranged between the cover plate 22 and the conducting sheet 23.

[0046] Through such a design of the chip aluminum electrolytic capacitor of the present invention, when a certain capacitor monomer is damaged or its performance has problems, for example, the electrolytic paper is damaged or the positive aluminum foil sheet or the negative aluminum foil sheet is damaged, it will not pose a fatal impact on the whole capacitor. It only needs to replace the independent capacitor monomer, or it can still work without replacement.

[0047] In some embodiments, the aluminum purity of the positive aluminum foil sheet or the negative aluminum foil sheet is ≥99.9%;

[0048] In some embodiments, the main solvent of the electrolyte is composed of ethylene glycol and deionized water.

[0049] 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 creation of the present utility model belongs, 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 "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", 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.

[0050] 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 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.

[0051] In addition, the scope 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 to 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 chip multilayer aluminum electrolytic capacitor, characterized in that: It includes a housing, a plurality of capacitor monomers stacked in the housing, and a cover plate for encapsulating the plurality of capacitor monomers in the housing; wherein, a positive electrode lead-out terminal and a negative electrode lead-out terminal are installed on the cover plate; the capacitor monomers are in sheet form, each capacitor monomer is respectively provided with a positive electrode lead-out port and a negative electrode lead-out port, the positive electrode lead-out port and the negative electrode lead-out port are respectively arranged at both ends of the capacitor monomer, a plurality of capacitor monomers are stacked together, the positive electrode lead-out ports and the negative electrode lead-out ports of the capacitor monomers are respectively brought together, led out through a conducting piece and respectively connected to the positive electrode lead-out terminal and the negative electrode lead-out terminal on the cover plate.

2. The chip multilayer aluminum electrolytic capacitor according to claim 1, wherein: The positive electrode lead-out ports of the plurality of capacitor monomers are brought together through a cell terminal, the cell terminal is directly connected to the conducting piece and connected to the positive electrode lead-out terminal through the conducting piece.

3. The chip multilayer aluminum electrolytic capacitor according to claim 2, wherein: The cell terminal includes a plurality of terminal pieces, and each terminal piece independently connects a positive electrode lead-out port or a negative electrode lead-out port of a capacitor monomer.

4. The chip multilayer aluminum electrolytic capacitor according to claim 2, wherein: The conducting piece includes a main body part in contact with the cell terminal and a conducting part in contact with the positive electrode lead-out terminal or the negative electrode lead-out terminal.

5. The chip multilayer aluminum electrolytic capacitor according to claim 3, characterized in that: The plurality of terminal pieces of the cell terminal are independent of each other, and there are gaps between the terminal pieces.

6. The chip multilayer aluminum electrolytic capacitor according to any one of claims 1-5, characterized in that: The capacitor monomer includes a positive aluminum foil sheet, a negative aluminum foil sheet, electrolytic paper arranged between the positive aluminum foil sheet and the negative aluminum foil sheet, and a cladding layer that wraps the positive aluminum foil sheet, the negative aluminum foil sheet and the electrolytic paper inside.

7. The chip multilayer aluminum electrolytic capacitor according to claim 6, wherein: The positive aluminum foil sheet includes a sheet-shaped positive electrode plate, and the positive electrode lead-out port extends from the sheet-shaped positive electrode plate; the negative aluminum foil sheet includes a sheet-shaped negative electrode plate, and the negative electrode lead-out port extends from the sheet-shaped negative electrode plate.

8. The chip multilayer aluminum electrolytic capacitor according to claim 7, wherein: The positive electrode lead-out port is integrally formed with the sheet-shaped positive electrode plate; the negative electrode lead-out port is integrally formed with the sheet-shaped negative electrode plate.

9. The chip multilayer aluminum electrolytic capacitor according to claim 7, 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.

10. The chip multilayer aluminum electrolytic capacitor according to claim 7, wherein: 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.

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