CN219979351U

CN219979351U - Rectangular aluminum electrolytic capacitor

Info

Publication number: CN219979351U
Application number: CN202321053764.8U
Authority: CN
Inventors: 尹志华; 李良; 尹超
Original assignee: Shenzhen Jianghao Electron Co ltd
Current assignee: Shenzhen Jianghao Electron Co ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-11-07
Anticipated expiration: 2033-05-05

Abstract

The utility model discloses a rectangular aluminum electrolytic capacitor, which comprises a metal shell, a core pack arranged in the metal shell, a metal cover plate for packaging the core pack in the metal shell, and a terminal assembly arranged on the metal cover plate; the terminal assembly is fixed on the metal cover plate through laser welding, and the metal cover plate and the metal shell are mounted together through laser welding so as to encapsulate the core package in the metal shell; the terminal assembly is also connected to the core pack by laser welding. The rectangular aluminum electrolytic capacitor has a firm structure, and can greatly prolong the service life of the aluminum electrolytic capacitor.

Description

Rectangular aluminum electrolytic capacitor

Technical Field

The utility model belongs to the technical field of capacitors, and particularly relates to a rectangular aluminum electrolytic capacitor.

Background

The basic function of the capacitor is charging and discharging, and with the continuous improvement of the capacitor performance, the aluminum electrolytic capacitor has been widely applied to consumer electronics products, communication products, computers and peripheral products, new energy, automation control, automobile industry, photoelectric products, high-speed railway and aviation and military equipment, etc. In the technical field of consumer electronics, the application of the aluminum electrolytic capacitor has the characteristics of small volume, large stored electric quantity and high cost performance along with structural transformation and technical progress, and the aluminum electrolytic capacitor is expanded in various emerging fields such as energy-saving lamps, frequency converters, new energy sources and the like, and has wider application range.

At present, an aluminum electrolytic capacitor is generally composed of a core bag formed by winding positive and negative aluminum foils and electrolytic paper, a cylindrical aluminum shell and a sealing cover plate with positive and negative wiring terminals, wherein positive and negative terminal lead-out holes are formed in the cover plate, positive and negative terminals are arranged on the cover plate through holes, and the cover plate is generally manufactured by compounding high-temperature-resistant rubber and a phenolic resin substrate. The aluminum electrolytic capacitor in the prior art has a plurality of defects that the aluminum electrolytic capacitor is not firm enough and not firm enough after being packaged.

It is thus seen that there is a need in the art for a development and research to provide a solution that provides a robust rectangular aluminum electrolytic capacitor.

The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present utility model and is not necessarily prior art to the present application and is not intended to be used as an aid in the evaluation of the novelty and creativity of the present utility model in the event that no clear evidence indicates that such is already disclosed at the date of filing of the present application.

Disclosure of Invention

The present utility model is directed to a rectangular aluminum electrolytic capacitor, which solves at least one of the above-mentioned problems of the related art.

In order to achieve the above object, the technical solution of the embodiment of the present utility model is as follows:

a rectangular aluminum electrolytic capacitor comprises a metal shell, a core pack arranged in the metal shell, a metal cover plate for packaging the core pack in the metal shell, and a terminal assembly arranged on the metal cover plate; the terminal assembly is fixed on the metal cover plate through laser welding, and the metal cover plate and the metal shell are mounted together through laser welding so as to encapsulate the core package in the metal shell; the terminal assembly is also connected to the core pack by laser welding.

In some embodiments, the core pack is in the shape of a flat rectangle comprising a current collector, electrolytic paper, cathode foil, and anode foil.

In some embodiments, the metal shell is flat rectangular, and one end of the metal shell is provided with a rectangular opening.

In some embodiments, the metal cover plate is encapsulated at the rectangular opening of the metal shell and is connected with the metal shell by laser welding.

In some embodiments, the metal cover plate is generally rectangular in shape and includes a metal cover plate body, a terminal assembly disposed on the metal cover plate body.

In some embodiments, the metal cover body is provided with a groove, and a terminal assembly mounting hole is provided on a bottom surface of the groove.

In some embodiments, the terminal assembly includes an outgoing metal lead, an insulating rubber mount, and a metal sleeve.

In some embodiments, the insulating rubber seat is disposed between the lead-out metal lead pin and a metal sleeve welded to the terminal assembly mounting hole, thereby mounting and securing the terminal assembly to the metal cover body.

In some embodiments, the opening edge of the groove of the metal cover plate main body is arranged to be arc-shaped, and the joint of the bottom surface of the groove and the side surfaces around is arranged to be arc-shaped.

In some embodiments, the metal cover body is rectangular, and the connection part between every two adjacent surfaces of the outer surface of the metal cover body is arc-shaped.

The technical scheme of the utility model has the beneficial effects that:

compared with the prior art, the rectangular aluminum electrolytic capacitor has a firm structure, and can greatly prolong the service life of the aluminum electrolytic capacitor.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a perspective view of a rectangular aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a rectangular aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram showing connection between a core pack and a terminal assembly of a rectangular aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a metal cover plate of a rectangular aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 5 is an exploded view of a terminal assembly of a rectangular aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 6 is another angular schematic view of a metal cover plate of a rectangular aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 7 is an exploded view of a metal cover plate of a rectangular aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 8 is a schematic view showing a cut-away of a metal cover plate of a rectangular aluminum electrolytic capacitor according to an embodiment of the present utility model;

Detailed Description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present utility model more clear and make those skilled in the art better understand the solutions of the present utility model, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be 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 be indirectly connected to the other element. In addition, the connection may be for a fixing function or for a circuit communication function.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing embodiments of the utility model and to simplify the description by referring to the figures, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In describing embodiments of the present utility model, unless explicitly stated and limited otherwise, the meaning of "plurality" is two or more, and the terms "mounted," "connected," "secured," etc. are to be construed broadly, as for example, they may be fixedly connected, detachably connected, or as a unit; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 8, as an embodiment of the present utility model, there is provided a rectangular aluminum electrolytic capacitor 100, wherein the rectangular aluminum electrolytic capacitor 100 of the present utility model includes a metal case 10, a core pack 20 mounted in the metal case 10, a metal cap plate 300 encapsulating the core pack 20 in the metal case, and a terminal assembly 400 mounted on the metal cap plate 300, as shown in fig. 2, 3, 4, 5; wherein the terminal assembly 400 is fixed on the metal cover plate 300 by laser welding, and the metal cover plate 300 and the metal housing 10 are mounted together by laser welding to encapsulate the core pack 20 in the metal housing 10; the terminal assembly 400 is also connected to the core pack 20 by laser welding.

Referring to fig. 2 and 3, the core pack 20 includes a current collector 21, electrolytic paper (not numbered), a cathode foil (not numbered), and an anode foil (not numbered), wherein the electrolytic paper layer is respectively disposed between the innermost layer of the core pack 20 and the cathode foil and the anode foil; the current collector 21 comprises an anode current collector and a cathode current collector; specifically, a negative current collector is led out of the cathode foil, and a positive current collector is led out of the anode foil; as an embodiment of the utility model, the electrolytic paper, the cathode foil and the anode foil are arranged in sequence. In another embodiment, after the electrolytic paper and the cathode foil are wound into a flat shape with a certain thickness, adding the positive foil and continuing to wind into a flat shape until the quantitative cutting length of the positive foil is fully wrapped in the electrolytic paper and the cathode composite layer. In some embodiments, the core pack 20 is generally in the shape of a flat rectangle.

Referring to fig. 4, 6, 7 and 8, the metal casing 10 is a rectangular container with one end open, and is made of metal; in particular, the metal shell 10 may be an aluminum shell, a stainless steel shell, or an alloy shell. In some embodiments, one end of the metal housing is provided with a rectangular opening 101, and the metal housing 10 is flat rectangular; the core pack 20 is placed inside the metal shell 10 through the rectangular opening 101 of the metal shell. In some embodiments, rounded transitions are provided at the corners of the metal shell 10.

The metal cover 300 is encapsulated at the rectangular opening 101 of the metal casing 10, and is connected with the metal casing 10 by laser welding, and the metal cover 300 is substantially rectangular and comprises a metal cover body 30 and a terminal assembly 400 arranged on the metal cover body 30; wherein, the metal cover body 30 is provided with a groove 31, and a terminal assembly mounting hole 310 is arranged on the bottom surface of the groove 31; the terminal assembly 400 comprises a lead-out metal guide pin 40, an insulating rubber seat 41 and a metal sleeve 42; the insulating rubber seat 41 is disposed between the lead-out metal pins 40 and the metal sleeve 42, and the metal sleeve 42 is welded to the terminal assembly mounting hole 310, so that the terminal assembly 400 is mounted and fixed on the metal cover body 30.

Referring to fig. 7 and 8, the opening edge of the groove 31 of the metal cover main body 30 is provided with an arc shape to form an arc opening inclined inwards; the junction of the bottom surface and the peripheral side surfaces of the groove 31 is provided with an arc transition. In the embodiment of the utility model, the groove 31 of the metal cover body 30 is a rectangular shape. In some embodiments, the metal cover body 30 has a rectangular shape, and the connection between each two adjacent surfaces of the outer surface of the metal cover body 30 is configured to have an arc shape.

It should be noted that, in other embodiments, the metal cover body 30 and/or the groove 31 of the metal cover body 30 may be configured in other shapes, and no matter what shape is configured, the metal cover body and the groove should fall within the protection scope of the present utility model.

In some embodiments, the depth of the recess 31 is less than the height of the metal sleeve 42 of the terminal assembly 400; the outer diameter of the metal sleeve 42 is adapted to the terminal assembly mounting hole 310; the insulating rubber seat 41 of the terminal assembly comprises a cylindrical sleeve 410 and a circular chassis 411, wherein the outer diameter of the circular chassis 411 is larger than the aperture of the terminal assembly mounting hole 310. The metal sleeve 42 is welded to the metal cap plate 300 at the terminal assembly mounting hole 310 by laser so that the terminal assembly 400 is fixed to the metal cap plate 300.

In some embodiments, the terminal assembly mounting holes 310 are two for mounting the positive and negative terminal assemblies. The two terminal assembly mounting holes 310 are symmetrically or asymmetrically provided on the metal cap body 30.

Referring to fig. 5 and 8, an insulating rubber seat 41 of the terminal assembly is provided between the lead-out metal lead 40 and the metal sleeve 42 so as to insulate the lead-out metal lead 40 from the metal sleeve 42; the lead-out metal guide pin 40 comprises a CP lead 401, an aluminum stem 402 and a welding base 403. The welding base 403 of the metal guide pin is welded on the current collector 21 of the core pack 20 through laser. In some embodiments, the metal guide pin 40 includes a positive metal guide pin and a negative metal guide pin, and the welding base of the positive metal guide pin and the welding base of the negative metal guide pin are welded on the positive current collector and the negative current collector of the core pack respectively through laser welding.

In the embodiment of the present utility model, the CP lead 401 from which the metal lead 40 is led out and the aluminum stem 402 are in a circular strip shape, wherein the diameter of the aluminum stem 402 is greater than the diameter of the CP lead 401, and the length of the CP lead 401 is greater than the length of the aluminum stem 402; the welding base 403 is disc-shaped, and is welded to the cell of the aluminum electrolytic container through the welding base 403.

The insulating rubber seat 41 comprises a cylindrical sleeve 410 and a circular chassis 411, a through hole 412 matched with the aluminum stem 402 for leading out the metal guide pin is arranged in the center of the insulating rubber seat 41, and the outer diameter of the aluminum stem 402 is matched with the inner diameter of the through hole 412, so that the aluminum stem 402 can be tightly sleeved in the through hole 412. In some embodiments, the length of the through hole 412 is greater than the length of the aluminum stem 402. In some embodiments, the diameter of the cylindrical sleeve 410 is less than the diameter of the circular chassis 411. The circular chassis 411 of the insulating rubber mount 41 is abutted against the welding base 403 from which the metal lead 40 is led out.

The metal sleeve 42 is arranged on the surface of the cylindrical sleeve 410 of the insulating rubber seat 41, and corresponds to the cylindrical sleeve 410, the metal sleeve 42 is cylindrical, the inner diameter of the metal sleeve 42 is matched with the outer diameter of the cylindrical sleeve 410, the length of the metal sleeve 42 is greater than that of the cylindrical sleeve 410, the metal sleeve 42 is sleeved on the surface of the cylindrical sleeve 410 to be bunched, one end of the metal sleeve 42 is connected with the circular chassis 411 of the insulating rubber seat 41 in a low-pressure manner, and the other end of the metal sleeve 42 is buckled with the cylindrical sleeve 410 of the insulating rubber seat 41 through a curled edge. In some implementations, the metal sleeve 42 is an aluminum tube.

In some embodiments, the welding base 403 of the lead-out metal pin 40 is provided with a circular protruding strip 404 on the upper surface, and an annular groove 405 is formed between the circular protruding strip 404 and the bottom of the aluminum stem; so designed, when the metal sleeve 42 is in a girdling state, the insulating rubber seat 41 is extruded, the circular chassis 411 of the insulating rubber seat 41 is partially extruded and embedded into the annular groove 405, and meanwhile, the circular protruding strip 404 is extruded and embedded into the circular chassis 411 of the insulating rubber seat 41, so that the insulating rubber seat 41 and the lead-out metal guide pin 40 are tightly combined together.

It should be understood that, in some embodiments, the lead-out metal pins 40 may be in the shape of strips with other irregular patterns, and the shapes of the lead-out metal pins are not particularly limited in this embodiment, and any pattern should be included in the protection scope of the present utility model as long as the pattern does not deviate from the gist of the present utility model.

It is to be understood that the foregoing is a further detailed description of the present utility model in connection with the specific/preferred embodiments, and that no particular implementation of the present utility model is to be considered limited to such description. It will be apparent to those skilled in the art to which the present utility model pertains that many substitutions and modifications of these described embodiments may be made without departing from the inventive concepts herein, and these substitutions and modifications are intended to be within the scope of this patent. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model.

In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. 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 as defined by the appended claims.

Furthermore, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. Those of ordinary skill in the art will readily appreciate that the above-described disclosures, procedures, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Claims

1. A rectangular aluminum electrolytic capacitor, characterized in that: the metal cover plate comprises a metal shell, a core pack arranged in the metal shell, a metal cover plate for packaging the core pack in the metal shell and a terminal assembly arranged on the metal cover plate; the terminal assembly is fixed on the metal cover plate through laser welding, and the metal cover plate and the metal shell are mounted together through laser welding so as to encapsulate the core package in the metal shell; the terminal assembly is also connected to the core pack by laser welding.

2. The rectangular aluminum electrolytic capacitor as recited in claim 1, wherein: the core bag is in a flat rectangular shape and comprises a current collector, electrolytic paper, cathode foil and anode foil.

3. The rectangular aluminum electrolytic capacitor as recited in claim 2, wherein: the metal shell is flat rectangle, and one end of metal shell is provided with the rectangle opening.

4. A rectangular aluminum electrolytic capacitor as recited in claim 3, wherein: the metal cover plate is encapsulated at the rectangular opening of the metal shell and is connected with the metal shell through laser welding.

5. A rectangular aluminum electrolytic capacitor as recited in claim 3, wherein: the metal cover plate is approximately rectangular and comprises a metal cover plate main body and a terminal assembly arranged on the metal cover plate main body.

6. The rectangular aluminum electrolytic capacitor as recited in claim 5, wherein: the metal cover plate main body is provided with a groove, and a terminal assembly mounting hole is formed in the bottom surface of the groove.

7. The rectangular aluminum electrolytic capacitor as recited in claim 6, wherein: the terminal assembly comprises an outgoing metal guide pin, an insulating rubber seat and a metal sleeve.

8. The rectangular aluminum electrolytic capacitor as recited in claim 7, wherein: the insulating rubber seat is arranged between the lead-out metal guide pin and the metal sleeve, and the metal sleeve is welded at the terminal assembly mounting hole, so that the terminal assembly is mounted and fixed on the metal cover plate main body.

9. The rectangular aluminum electrolytic capacitor as recited in claim 8, wherein: the edge of the opening of the groove of the metal cover plate main body is arc-shaped, and the joint of the bottom surface of the groove and the side surfaces around is arc-shaped.

10. The rectangular aluminum electrolytic capacitor as recited in claim 9, wherein: the metal cover plate main body is rectangular, and the joint of every two adjacent surfaces of the outer surface of the metal cover plate main body is arc-shaped.