CN212230265U

CN212230265U - Staggered stacked capacitor

Info

Publication number: CN212230265U
Application number: CN202021316861.8U
Authority: CN
Inventors: 杜嘉杰; 魏蓉晖
Original assignee: Dong Jia Electronics Chenzhou Co ltd
Current assignee: Dong Jia Electronics Chenzhou Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2020-12-25
Anticipated expiration: 2030-07-07

Abstract

The utility model discloses a crisscross stacked type condenser, including first electric capacity unit, second electric capacity unit, lead frame and encapsulation unit. The thickness of the negative end of the first capacitor unit is larger than that of the positive end of the first capacitor unit, the thickness of the negative end of the second capacitor unit is larger than that of the positive end of the second capacitor unit, the second capacitor unit is stacked on the first capacitor unit and faces in opposite directions, the two positive electrode parts of the lead frame are respectively connected with the positive ends of the first capacitor unit and the second capacitor unit, the negative electrode part of the lead frame is connected with the negative end of the capacitor unit, and the packaging unit coats the first capacitor unit, the second capacitor unit and part of the lead frame. Therefore, the overall size of the stacked capacitor can be reduced, the total thickness of the stacked capacitor is uniform, and the stacked capacitor is convenient to package.

Description

Staggered stacked capacitor

Technical Field

The utility model relates to a pile up the type condenser, especially relate to a make the even crisscross type condenser that piles up of gross thickness.

Background

Capacitors have been widely used in consumer appliances, computer motherboards and their peripherals, power supplies, communication articles, automobiles, and other basic components, and are one of the indispensable components in electronic products, and their main functions include: charge storage, ac filtering, bypassing, coupling, decoupling, phase inversion, tuning, etc. Various capacitors have different capacitance characteristics and therefore, their functions and application range are different. Among them, the solid electrolytic capacitor has high capacitance, small size and volume, excellent frequency characteristics, low manufacturing cost and wide application range, and is suitable for most electric and electronic products.

Referring to fig. 1 and 2, in the conventional capacitor related art, there are some areas in which the size and shape of the capacitor need to be improved due to the structure of the capacitor and the manufacturing method. For example: the difference between the front thickness S1 and the rear thickness S2 of the capacitor unit is too large, so that the total front thickness H1 and the total rear thickness H2 of the stacked capacitor are too large. The excessively thick total thickness of the stacked capacitor will result in the thinning of the wall thickness of the stacked capacitor from the package body, which is not favorable for packaging, affects the packaging strength, and is easy to cause the phenomena of electrical instability or leakage current caused by the exposure of the inner layer material, poor air tightness, and easy influence of moisture. These problems have a large impact on the overall performance and safety of current capacitors.

Therefore, it is a primary object of the present invention to provide a staggered stacked capacitor to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a crisscross stacked type condenser can reduce the overall dimension who piles up the type condenser for it is even to pile up the type condenser gross thickness, and is convenient for pile up the encapsulation of type condenser.

To achieve at least one of the above advantages or other advantages, an embodiment of the present invention provides a staggered stacked capacitor. The staggered stacked capacitor comprises at least one first capacitor unit, at least one second capacitor unit, a lead frame and a packaging unit.

The first capacitor unit comprises a first positive terminal and a first negative terminal, and the thickness of the first negative terminal is greater than that of the first positive terminal.

The second capacitor unit comprises a second positive terminal and a second negative terminal, the thickness of the second negative terminal is larger than that of the second positive terminal, the second capacitor unit is stacked on the first capacitor unit, and the orientation directions of the first positive terminal and the second positive terminal are opposite.

The lead frame comprises a first positive pole part, a second positive pole part and a negative pole part, the first positive pole part and the second positive pole part are respectively located on two sides of the negative pole part, the first capacitor unit and the second capacitor unit are arranged on the negative pole part, the first positive pole end is connected with the first positive pole part, and the second positive pole end is connected with the second positive pole part.

The packaging unit wraps the first capacitor unit, the second capacitor unit and part of the lead frame.

In some embodiments, the number of first capacitive units is the same as the number of second capacitive units.

In some embodiments, the at least one first capacitor unit is two first capacitor units, the at least one second capacitor unit is two second capacitor units, the first capacitor units and the second capacitor units are alternately stacked, and the first capacitor unit, the second capacitor unit, the other first capacitor unit and the other second capacitor unit are sequentially arranged from bottom to top from the negative part.

In some embodiments, the at least one first capacitor unit is two first capacitor units, the at least one second capacitor unit is two second capacitor units, the first capacitor units and the second capacitor units are stacked alternately, and the first capacitor unit, the other first capacitor unit, the second capacitor unit and the other second capacitor unit are arranged in sequence from bottom to top from the negative part.

In some embodiments, the first positive electrode portion has a height difference from the second positive electrode portion.

In some embodiments, the first capacitive unit is identical to the second capacitive unit.

In some embodiments, the first positive electrode portion is electrically connected to the second positive electrode portion.

Therefore, utilize the utility model provides a crisscross stacked type condenser borrows by the crisscross mode of piling up, can reduce the overall size of stacked type condenser for it is even to pile up the type condenser gross thickness, promotes the encapsulation intensity of encapsulation unit, and can effectively avoid the inner layer material to expose, the air tightness is not good, easily receive the moisture influence to lead to the electric property unstable or have the phenomenon of leakage current to take place. In addition, the packaging of the stacked capacitor can be facilitated.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are listed, and the detailed description is given below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It should be apparent that the drawings in the following description are only examples of the present application and are not intended to limit the embodiments of the present invention, and that other drawings can be derived from the drawings by those of ordinary skill in the art without inventive exercise. The drawings comprise:

FIG. 1 is a related art schematic of a capacitor cell;

fig. 2 is a related art schematic diagram of a stacked capacitor;

fig. 3 is a schematic side view of a staggered stacked capacitor according to a first embodiment of the present invention;

fig. 4 is a schematic side view of a staggered stacked capacitor according to a second embodiment of the present invention; and

fig. 5 is a schematic top view of a lead frame according to the present invention.

The attached drawings are marked as follows: 10-staggered stacked capacitor; 12-a first capacitive unit; 122-a first positive terminal; 124-a first negative terminal; 14-a second capacitive unit; 142-a second positive terminal; 144-a second negative terminal; 16-lead frame; 162-a first positive electrode portion; 164-a second positive electrode portion; 166-negative electrode part; 18-packaging the unit.

Detailed Description

Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present invention. The invention may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or component being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In addition, the term "comprises" and any variations thereof mean "including at least".

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integrally formed connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Referring to fig. 3, fig. 3 is a schematic side view of a staggered stacked capacitor 10 according to a first embodiment of the present invention. To achieve at least one of the advantages or other advantages, a first embodiment of the present invention provides a staggered stacked capacitor 10. As shown in fig. 3, the staggered stacked capacitor 10 includes a first capacitor unit 12, a second capacitor unit 14, a lead frame 16 and a package unit 18.

The first capacitor unit 12 includes a first positive terminal 122 and a first negative terminal 124, and the thickness of the first negative terminal 124 is greater than the thickness of the first positive terminal 122.

The second capacitor unit 14 includes a second positive terminal 142 and a second negative terminal 144, the thickness of the second negative terminal 144 is greater than the thickness of the second positive terminal 142, the second capacitor unit 14 is stacked on the first capacitor unit 12, and the first positive terminal 122 faces the second positive terminal 142 in the opposite direction. That is, the first capacitor unit 12 and the second capacitor unit 14 are oriented in opposite directions (as shown in fig. 3). In an embodiment, the second negative terminal 144 of the second capacitor unit 14 can be fixed by conductive adhesive and electrically connected to the first negative terminal 124 of the first capacitor unit 12.

The lead frame 16 includes a first positive portion 162, a second positive portion 164 and a negative portion 166, the first positive portion 162 and the second positive portion 164 are respectively located at two sides of the negative portion 166, the first capacitor unit 12 and the second capacitor unit 14 are both disposed on the negative portion 166, the first positive terminal 122 of the first capacitor unit 12 is electrically connected to the first positive portion 162, and the second positive terminal 142 of the second capacitor unit 14 is electrically connected to the second positive portion 164. The first negative terminal 124 of the first capacitor unit 12 and the second negative terminal 144 of the second capacitor unit 14 are electrically connected to the negative portion 166. In one embodiment, the first negative terminal 124 of the first capacitor unit 12 can be fixed and electrically connected to the negative part 166 through conductive adhesive, the first positive terminal 122 of the first capacitor unit 12 can be fixed and electrically connected to the first positive part 162 through conductive adhesive connection or welding, and the second positive terminal 142 of the second capacitor unit 14 can be fixed and electrically connected to the second positive part 164 through conductive adhesive connection or welding.

The package unit 18 encapsulates the first capacitor unit 12, the second capacitor unit 14, and a portion of the lead frame 16. The encapsulation unit 18 serves to protect the interleaved stacked capacitor 10 from external environments, such as moisture, dust, external impact reduction, and the like.

By such a way that the first capacitor unit 12 and the second capacitor unit 14 are stacked alternately, the overall thickness of the alternately stacked capacitor 10 can be made uniform. That is, when the first capacitor unit 12 and the second capacitor unit 14 are alternately stacked, the overall front end thickness and the rear end thickness are substantially the same.

Referring to fig. 4, fig. 4 is a schematic side view of a staggered stacked capacitor 10 according to a second embodiment of the present invention. To achieve at least one of the advantages or other advantages, a second embodiment of the present invention further provides a staggered stacked capacitor 10. As shown in fig. 4, the cross-stacked capacitor 10 includes two first capacitor units 12, two second capacitor units 14, a lead frame 16 and a package unit 18.

Each first capacitor unit 12 includes a first positive terminal 122 and a first negative terminal 124, and the thickness of the first negative terminal 124 is greater than the thickness of the first positive terminal 122. Two first capacitor units 12 are stacked in the same direction.

Each second capacitor unit 14 includes a second positive terminal 142 and a second negative terminal 144, and the thickness of the second negative terminal 144 is greater than the thickness of the second positive terminal 142. Two second capacitor units 14 are stacked toward the same direction. The two second capacitor units 14 are reversely stacked on the two first capacitor units 12, the first capacitor units 12 and the second capacitor units 14 are disposed on the cathode portion 166 of the packaging unit 18, and from the cathode portion 166, the first capacitor unit 12, the other first capacitor unit 12, the second capacitor unit 14, and the other second capacitor unit 14 are arranged in sequence from bottom to top. The first positive terminal 122 and the second positive terminal 142 face in opposite directions. That is, the first capacitor unit 12 and the second capacitor unit 14 are oriented in opposite directions (as shown in fig. 4).

The lead frame 16 includes a first positive portion 162, a second positive portion 164 and a negative portion 166, the first positive portion 162 and the second positive portion 164 are respectively located at two sides of the negative portion 166, the first capacitor unit 12 and the second capacitor unit 14 are both disposed on the negative portion 166, the first positive terminal 122 of the first capacitor unit 12 is electrically connected to the first positive portion 162, and the second positive terminal 142 of the second capacitor unit 14 is electrically connected to the second positive portion 164.

The package unit 18 encapsulates the first capacitor unit 12, the second capacitor unit 14, and a portion of the lead frame 16. The encapsulation unit 18 serves to protect the interleaved stacked capacitor 10 from external environments, such as moisture, dust, external impact reduction, and the like. To further illustrate, the package unit 18 may be made of any insulating material, such as epoxy (epoxy) or silicon (silicon).

In another embodiment, the second capacitor units 14 are stacked on the first capacitor units 12 in an interlaced manner, the first capacitor units 12 and the second capacitor units 14 are disposed on the cathode portion 166 of the packaging unit 18, and from the cathode portion 166, one first capacitor unit 12, one second capacitor unit 14, another first capacitor unit 12, and another second capacitor unit 14 are arranged in sequence from bottom to top. However, the present invention is not limited thereto, and the first capacitor unit 12 and the second capacitor unit 14 can be alternatively interleaved and stacked when the number of the first capacitor unit and the second capacitor unit is larger.

To further illustrate, the first positive electrode portion 162 and the second positive electrode portion 164 of the lead frame 16 have a height difference to match the positions of the first capacitor unit 12 and the second capacitor unit 14. The first capacitor unit 12 and the second capacitor unit 14 are the same capacitor unit. For example, the first capacitor unit 12 and the second capacitor unit 14 each include a metal foil, a dielectric layer, a conductive polymer layer, a carbon glue layer, and a silver glue layer. The metal foil may be aluminum, copper or any metallic material. The dielectric layer is formed on the outer surface of the metal foil, completely covering the metal foil. The conductive polymer layer covers part of the surface of the dielectric layer. The carbon glue layer is coated with the conductive high molecular layer, and the silver glue layer is coated with the carbon glue layer. However, the present invention is not limited thereto, and the first capacitor unit 12 and the second capacitor unit 14 may be different and may be selected according to actual requirements. The first positive electrode portion 162 and the second positive electrode portion 164 may also be the same height.

Referring to fig. 5, fig. 5 is a schematic top view of a lead frame 16 according to the present invention. As shown in fig. 5, the first positive electrode portion 162 of the lead frame 16 is electrically connected to the second positive electrode portion 164, and is a unitary lead frame 16. However, the present invention is not limited thereto, and in one embodiment, the lead frame 16 may be a separate lead frame 16, that is, the two positive electrode portions are not integrally formed but electrically connected by wire connection or the like.

To sum up, the utility model provides a crisscross stacked type condenser 10 compares in the present stacked type condenser, borrows by the crisscross mode of piling up of first electric capacity unit 12 and second electric capacity unit 14, can reduce the overall dimension of stacked type condenser for it is even to pile up type condenser gross thickness, promotes encapsulation unit 18's packaging strength, and can effectively avoid the inner layer material to expose, the gas tightness is not good, easily receive the moisture to influence and lead to the electric property unstable or have the phenomenon of leakage current to take place. In addition, the packaging of the stacked capacitor can be facilitated.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make many modifications or equivalent variations by using the above disclosed method and technical contents without departing from the technical scope of the present invention, but all the simple modifications, equivalent variations and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. An interleaved stacked capacitor, comprising:

the first capacitor unit comprises a first positive terminal and a first negative terminal, and the thickness of the first negative terminal is greater than that of the first positive terminal;

at least one second capacitor unit, the second capacitor unit comprising a second positive terminal and a second negative terminal, the second negative terminal having a thickness greater than the second positive terminal, the at least one second capacitor unit being stacked on the at least one first capacitor unit, wherein the first positive terminal and the second positive terminal face in opposite directions;

the lead frame comprises a first positive electrode part, a second positive electrode part and a negative electrode part, the first positive electrode part and the second positive electrode part are respectively positioned on two sides of the negative electrode part, the first capacitor unit and the second capacitor unit are arranged on the negative electrode part, the first positive electrode end is connected with the first positive electrode part, and the second positive electrode end is connected with the second positive electrode part; and

and the packaging unit is used for coating the first capacitor unit, the second capacitor unit and part of the lead frame.

2. The interleaved stacked capacitor as claimed in claim 1 wherein the number of said first capacitor cells is the same as the number of said second capacitor cells.

3. The interleaved stacked capacitor as claimed in claim 2, wherein said at least one first capacitor unit is two first capacitor units, said at least one second capacitor unit is two second capacitor units, said first capacitor units and said second capacitor units are alternately stacked, and from said negative electrode portion, one of said first capacitor units, one of said second capacitor units, another of said first capacitor units, and another of said second capacitor units are arranged in order from bottom to top.

4. The interleaved stacked capacitor as claimed in claim 2, wherein said at least one first capacitor unit is two first capacitor units, said at least one second capacitor unit is two second capacitor units, said first capacitor units and said second capacitor units are interleaved and stacked, and from said negative electrode portion, one of said first capacitor units, another of said first capacitor units, one of said second capacitor units, and another of said second capacitor units are arranged in order from bottom to top.

5. The interleaved stacked capacitor as claimed in claim 1, wherein said first positive electrode part and said second positive electrode part have a height difference.

6. The interleaved stacked capacitor as claimed in claim 1 wherein said first capacitive unit is identical to said second capacitive unit.

7. The interleaved stacked capacitor as claimed in claim 1 wherein said first positive electrode portion is electrically connected to said second positive electrode portion.