CN219246539U

CN219246539U - Aluminum electrolytic capacitor

Info

Publication number: CN219246539U
Application number: CN202222591386.0U
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: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-06-23
Anticipated expiration: 2032-09-29

Abstract

The utility model discloses an aluminum electrolytic capacitor, which comprises a shell, a capacitor core pack arranged in the shell, a cover plate for packaging the capacitor core pack in the shell and a wiring terminal assembly arranged on the cover plate, wherein the cover plate is arranged on the upper surface of the shell; the shell comprises a column-shaped shell body, wherein mutually-crossed protruding strips are arranged on the bottom surface of the shell body, the mutually-crossed protruding strips are intersected at the center of the bottom surface of the shell, the bottom surface of the shell is divided into a plurality of sector areas, and cross grooves are formed in each sector area. According to the aluminum electrolytic capacitor, the core package can be stably packaged and fixed in the shell body, so that the anti-seismic performance of the aluminum electrolytic capacitor is improved; and through the cross groove on the bottom surface of the inner part of the shell, a certain airflow channel is arranged between the capacitor core bag and the bottom surface of the inner part of the shell, so that the explosion-proof performance of the aluminum electrolytic capacitor can be improved.

Description

Aluminum electrolytic capacitor

Technical Field

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

Background

Along with the development of new energy automobiles, energy storage products are rapidly developed; at present, all energy storage devices are packaged and protected by a shell made of special materials. Such as: in the aluminum electrolytic capacitor, the liquid electrolyte is packaged by adopting a shell, a cover plate with an electrode terminal and a buffer rubber cushion with good air tightness in combination. For example, chinese patent publication No. 200820216600.1 discloses an aluminum electrolytic capacitor, in which the outer casing of the aluminum electrolytic capacitor is circular, and the circular cover plate is installed at the opening of the circular aluminum casing, and then the cover plate is pressed inwards by the circular edge of the aluminum casing to perform edge covering.

The new energy automobile has very high safety requirements such as stability, shock resistance, explosion prevention requirements and the like due to the use environment, so that the new energy automobile has extremely high requirements on the aluminum electrolytic capacitor applied to the new energy automobile. The aluminum electrolytic capacitor disclosed in China patent publication No. 200820216600.1 has a relatively simple shell, and the aluminum electrolytic capacitor obtained by simply packaging the shell has poor shock resistance, so that the aluminum electrolytic capacitor is difficult to apply to the application fields such as new energy automobiles and the like which have high requirement on shock resistance.

Therefore, in order to solve the above-mentioned problems in the prior art, it is necessary to develop a solution for providing an aluminum electrolytic capacitor housing applicable to the new energy automobile field to improve the shock-absorbing performance and the explosion-proof performance.

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 to evaluate the novelty and creativity of the present application in the event that no clear evidence indicates that such is already disclosed at the filing date of the present application.

Disclosure of Invention

The present utility model is directed to an aluminum electrolytic capacitor that 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:

an aluminum electrolytic capacitor comprises a shell, a capacitor core pack arranged in the shell, a cover plate for packaging the capacitor core pack in the shell and a wiring terminal assembly arranged on the cover plate; the shell comprises a column-shaped shell body, wherein mutually-crossed protruding strips are arranged on the bottom surface of the shell body, the mutually-crossed protruding strips are intersected at the center of the bottom surface of the shell, the bottom surface of the shell is divided into a plurality of sector areas, and cross grooves are formed in each sector area.

In some embodiments, the protruding strip is substantially square block-shaped, and the cross section of the protruding strip is square.

In some embodiments, the protruding strip passes through the center of the bottom surface of the shell and two ends of the protruding strip are connected with the inner wall of the shell.

In some embodiments, the two ribs divide the circle of the bottom surface of the housing equally into four sectors.

In some embodiments, the cross grooves are independent of each other, and the tail end of each cross groove, the protruding strip and the inside of the shell are provided with a displacement.

In some embodiments, the junction of the circular edge of the bottom surface of the housing and the inner wall of the housing is provided with an annular bevel.

In some embodiments, the terminal assembly includes an outgoing terminal and an electrode electrically connected to the outgoing terminal.

In some embodiments, the capacitor core pack comprises a core pack body formed by laminating and coaxially winding an electrolytic paper layer and an aluminum foil, wherein the top of the core pack body is provided with a cathode lead-out strip and an anode lead-out strip.

In some embodiments, the aluminum foil layer comprises a negative aluminum foil layer and a positive aluminum foil layer, wherein the negative aluminum foil layer has the negative lead-out strip led out thereon; and the anode foil guiding strip is led out from the anode aluminum foil layer.

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

compared with the prior art, the aluminum electrolytic capacitor provided by the utility model has the advantages that the capacitor core package in the shell is extruded and packaged through the protruding strip arranged at the bottom, so that the core package can be stably packaged and fixed in the shell body, and the anti-seismic performance of the aluminum electrolytic capacitor is further improved; and through the cross groove on the bottom surface of the inner part of the shell, a certain airflow channel is arranged between the capacitor core bag and the bottom surface of the inner part of the shell, so that the explosion-proof performance of the aluminum electrolytic capacitor can be improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.

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 an aluminum electrolytic capacitor according to an embodiment of the present utility model;

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

FIG. 3 is another angular illustration of the housing of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

fig. 4 is a cut-away view of an 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 4, as an embodiment of the present utility model, there is provided an aluminum electrolytic capacitor 200 including a case 100, a capacitor core pack (not shown) mounted inside the case 100, a cap plate 300 encapsulating the capacitor core pack inside the case, and a connection terminal assembly 400 mounted on the cap plate 300; wherein, the terminal assembly 400 includes a lead-out terminal and an electrode (not shown) electrically connected to the lead-out terminal; the housing 100 comprises a column-shaped housing body, wherein the inner part of the housing body is provided with mutually crossed protruding strips 12 on the bottom surface, the mutually crossed protruding strips 12 are intersected at the center of the bottom surface of the housing, and the bottom surface of the housing is divided into a plurality of sector blocks 110; wherein each sector 110 is provided with a cross-shaped slot 13.

In some embodiments, the protruding strip 12 is substantially square and block, the cross section 120 of the protruding strip is square, the protruding strip 12 passes through the center of the bottom surface of the housing, and two ends of the protruding strip are connected to the inner wall 101 of the housing.

In some embodiments, the tabs 12 are at least two; in the embodiment of the present utility model, the number of the protruding strips 12 is two, and the two protruding strips divide the circle of the bottom surface of the housing evenly to obtain four sector blocks 110. In other embodiments, the number of the protruding strips may be even or odd, which is not limited in the embodiments of the present utility model, and any number of protruding strips should fall within the scope of the present utility model as long as they do not deviate from the gist of the present utility model.

In some embodiments, the cross grooves 13 are independent of each other, and a displacement is provided between the end of each cross groove 13 and the protruding strip and the inside of the housing.

In some embodiments, the circular edge of the bottom surface of the housing meets the inner wall 101 of the housing is provided with an annular chamfer 102.

According to the embodiment of the utility model, the capacitor core package is encapsulated in the shell through the protruding strip arranged at the bottom, so that the core package can be stably encapsulated and fixed in the shell body, and the anti-seismic performance of the aluminum electrolytic capacitor is improved; and through the cross groove on the bottom surface of the inner part of the shell, a certain airflow channel is arranged between the capacitor core bag and the bottom surface of the inner part of the shell, so that the explosion-proof performance of the aluminum electrolytic capacitor can be improved.

When the aluminum electrolytic capacitor is applied, the capacitor core package is placed in the aluminum electrolytic capacitor, the aluminum electrolytic capacitor is subjected to waist binding to fix the capacitor core package, then the upper cover plate is installed for packaging, and the upper surface of the cover plate is tightly buckled after the edge of the opening of the shell is curled, so that the capacitor core package is packaged and fixed in the shell of the aluminum electrolytic capacitor.

The material of the shell of the aluminum electrolytic capacitor depends on the internal electrochemical environment of the packaged aluminum electrolytic capacitor, and can be prepared from any nonferrous metal or alloy material thereof, wherein the nonferrous metal which can resist chemical reaction of the electrolyte of the aluminum electrolytic capacitor can be changed according to the property of the electrolyte of the aluminum electrolytic capacitor; such as stainless steel, high purity aluminum, alloy materials, and the like. It should be noted that, the housing of the aluminum electrolytic capacitor of the present utility model may also be applied to the packaging of electronic and electric products having a power storage function, such as: liquid batteries, supercapacitors, aluminum electrolytic capacitors, or other new forms of energy storage devices that store electrical energy. After the metal shell is packaged in the energy storage product, the shock resistance and explosion-proof function of the energy storage product can be greatly improved, and the safety of the product is improved.

The lead-out terminals include positive and negative lead-out terminals that are connected to the circuit board when the electrolytic capacitor is mounted on the circuit board.

The capacitor core package comprises a core package main body formed by stacking and coaxially winding an electrolytic paper layer and an aluminum foil, wherein the top of the core package main body is provided with a cathode guide foil leading-out strip and an anode guide foil leading-out strip; the aluminum foil layer comprises a negative aluminum foil layer and a positive aluminum foil layer, wherein the negative aluminum foil layer is led out of the cathode guide foil lead-out strip; and the anode foil guiding strip is led out from the anode aluminum foil layer. The electrolytic paper layer is arranged between the negative aluminum foil layer and the positive aluminum foil layer.

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. An aluminum electrolytic capacitor, characterized in that: the capacitor comprises a shell, a capacitor core package arranged in the shell, a cover plate for packaging the capacitor core package in the shell and a wiring terminal assembly arranged on the cover plate; the shell comprises a column-shaped shell body, wherein mutually-crossed protruding strips are arranged on the bottom surface of the shell body, the mutually-crossed protruding strips are intersected at the center of the bottom surface of the shell, the bottom surface of the shell is divided into a plurality of sector areas, and cross grooves are formed in each sector area.

2. The aluminum electrolytic capacitor as recited in claim 1, wherein: the protruding strip is approximately square and blocky, and the cross section of the protruding strip is square.

3. The aluminum electrolytic capacitor as recited in claim 2, wherein: the protruding strip penetrates through the center of the bottom surface of the shell, and two ends of the protruding strip are connected with the inner wall of the shell.

4. The aluminum electrolytic capacitor as recited in claim 3, wherein: the number of the protruding strips is two, and the two protruding strips divide the circle of the bottom surface of the shell evenly to obtain four sector blocks.

5. The aluminum electrolytic capacitor as recited in claim 4, wherein: the cross grooves are mutually independent, and the tail end of each cross groove, the protruding strip and the inside of the shell are all provided with a section of displacement.

6. The aluminum electrolytic capacitor as recited in claim 5, wherein: an annular inclined plane is arranged at the joint of the round edge of the bottom surface of the shell and the inner wall of the shell.

7. The aluminum electrolytic capacitor as recited in claim 6, wherein: the wiring terminal assembly comprises a leading-out terminal and an electrode electrically connected with the leading-out terminal.

8. The aluminum electrolytic capacitor as recited in claim 7, wherein: the capacitor core package comprises a core package main body formed by stacking and coaxially winding an electrolytic paper layer and an aluminum foil, and a cathode lead-out strip and an anode lead-out strip are arranged at the top of the core package main body.

9. The aluminum electrolytic capacitor as recited in claim 8, wherein: the aluminum foil layer comprises a negative aluminum foil layer and a positive aluminum foil layer, wherein the negative aluminum foil layer is led out of the cathode guide foil lead-out strip; and the anode foil guiding strip is led out from the anode aluminum foil layer.