CN214898120U - Aluminum electrolytic capacitor - Google Patents
Aluminum electrolytic capacitor Download PDFInfo
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- CN214898120U CN214898120U CN202120401207.5U CN202120401207U CN214898120U CN 214898120 U CN214898120 U CN 214898120U CN 202120401207 U CN202120401207 U CN 202120401207U CN 214898120 U CN214898120 U CN 214898120U
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- electrolytic capacitor
- aluminum electrolytic
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- proof groove
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Abstract
The utility model discloses an aluminum electrolytic capacitor, wherein, the aluminum electrolytic capacitor comprises a shell, a capacitor core body and heat conducting paste, wherein, the shell is provided with an accommodating cavity, the bottom wall of the shell is locally concave to form an explosion-proof groove structure, the capacitor core body is arranged in the accommodating cavity, the capacitor core body is provided with a mounting end corresponding to the explosion-proof groove structure, a gap is formed between the mounting end and the bottom wall of the shell, the heat conducting paste is arranged in the gap, the wall thickness of the explosion-proof groove structure is thinner than that of the shell, when the aluminum electrolytic capacitor explodes, the explosion-proof groove structure cracks to release heat and pressure, thus ensuring the pressure of the aluminum electrolytic capacitor to be released at a preset position, thereby effectively controlling the explosion range, meanwhile, the heat generated by the capacitor core body is transferred to the bottom wall of the shell through the heat conducting paste filled in the gap between the mounting end and the bottom wall of the shell, and is dissipated to the air from the bottom wall of the shell, thereby avoiding heat from gathering at the bottom wall of the shell and leading to the early failure of the explosion-proof groove structure.
Description
Technical Field
The utility model relates to the field of capacitors, in particular to an aluminum electrolytic capacitor.
Background
An aluminum electrolytic capacitor is an important element used in a large number of mechanical equipment, and with the miniaturization of various mechanical equipment, the aluminum electrolytic capacitor is also smaller, so that the heat of the aluminum electrolytic capacitor is less likely to be dissipated, and poor heat dissipation easily causes slurry explosion of the aluminum electrolytic capacitor (due to boiling of electrolyte in the aluminum electrolytic capacitor, the shell of the aluminum electrolytic capacitor is damaged, and the electrolyte overflows). To the above problem, the explosion-proof tank is usually added to the bottom of the aluminum shell of the existing aluminum capacitor, so as to avoid the problem that the aluminum shell fragments splash to cause the short circuit after the aluminum capacitor is exposed to slurry, and the explosion-proof tank can influence the heat dissipation between the capacitor core and the bottom of the aluminum shell, so that the heat is gathered at the bottom of the aluminum shell, and the explosion-proof tank of the aluminum capacitor is easily caused to fail prematurely, so how to enhance the heat dissipation capability of the bottom of the aluminum capacitor shell is a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an aluminum electrolytic capacitor, aiming at solving the heat dissipation problem at the bottom of the aluminum electrolytic capacitor shell.
In order to achieve the above object, the present invention provides an aluminum electrolytic capacitor, comprising:
the shell is provided with a containing cavity, and the bottom wall of the shell is partially recessed to form an explosion-proof groove structure;
the capacitor core body is arranged in the accommodating cavity, the capacitor core body is provided with an installation end corresponding to the explosion-proof groove structure, and a gap is formed between the installation end and the bottom wall of the shell; and the number of the first and second groups,
and the heat conducting paste is arranged in the gap.
Optionally, the explosion-proof groove structure includes a first explosion-proof groove, the first explosion-proof groove includes a plurality of explosion-proof groove sections, and a plurality of one end of explosion-proof groove section is in the middle part position intersection intercommunication of casing diapire, the other end interval is towards the periphery of casing diapire extends.
Optionally, from the middle position to the edge of the bottom wall of the housing, the groove depth of the explosion-proof groove section is gradually reduced.
Optionally, the explosion-proof groove structure further comprises a second explosion-proof groove, and the second explosion-proof groove is annularly arranged and surrounds the outer side of the first explosion-proof groove.
Optionally, the aluminum electrolytic capacitor further includes a limiting structure, where the limiting structure includes a positioning portion and a matching portion that are matched with each other, one of the positioning portion and the matching portion is disposed on the housing, and the other is disposed on the capacitor core, so as to limit the capacitor core to rotate in the cavity.
Optionally, the positioning portion is a positioning rib, and the matching portion is a matching groove.
Optionally, the capacitor core body sequentially comprises a positive aluminum foil, electrolytic paper, a negative aluminum foil and insulating packing paper from inside to outside.
Optionally, an annular rib is disposed on an inner side wall of the housing, and correspondingly, an annular groove matched with the annular rib is disposed on an outer peripheral side of the capacitor core.
Optionally, the annular rib is made of an elastic material.
Optionally, one end of the shell is arranged in an opening;
the aluminum electrolytic capacitor also comprises a cover body which is detachably arranged at the opening of the shell.
In the technical scheme of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of a cross-sectional structure of an aluminum electrolytic capacitor provided by the present invention;
fig. 2 is a schematic top view of the housing in fig. 1.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if the present invention relates to a directional indication, the directional indication is only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The explosion-proof tank is add usually in the aluminum hull bottom to current aluminum capacitor to avoid aluminum capacitor to explode the problem that the thick liquid back aluminum hull piece splashes and arouses the circuit short circuit, for the too early failure of explosion-proof tank that prevents aluminum electrolytic capacitor bottom, need thicken aluminum electrolytic capacitor's aluminum hull bottom, nevertheless aluminum hull bottom thickening can weaken aluminum electrolytic capacitor's heat dissipation, there is the clearance simultaneously explosion-proof tank to make between condenser core and the aluminum hull bottom, aluminum electrolytic capacitor's heat dissipation has further been weakened, lead to aluminum electrolytic capacitor's life-span to shorten.
In view of this, the present invention provides an aluminum electrolytic capacitor, wherein fig. 1 to 2 are schematic structural diagrams of an embodiment of the aluminum electrolytic capacitor provided by the present invention.
Referring to fig. 1 and 2, the aluminum electrolytic capacitor 100 includes a housing 1, a capacitor core and a heat conducting paste, the housing 1 has a cavity, a bottom wall of the housing 1 is partially recessed to form an explosion-proof groove structure 11, the capacitor core is mounted in the cavity, the capacitor core has a mounting end corresponding to the explosion-proof groove structure 11, a gap is formed between the mounting end and the bottom wall of the housing 1, and the heat conducting paste is disposed in the gap.
The technical scheme of the utility model in, the capacitor core install in hold the chamber, the local undercut of diapire of casing 1 is in order to form explosion-proof groove structure 11, the wall thickness of explosion-proof groove structure 11 department is thinner when aluminum electrolytic capacitor 100 explodes, 11 fracture release heat and pressure of explosion-proof groove structure, so guarantee aluminum electrolytic capacitor 100 is in preset position department pressure release to can the effective control explosion range, simultaneously, through pack in the installation end with the heat conduction cream in clearance between the diapire of casing 1, will the heat transfer that the capacitor core produced extremely the diapire of casing 1, and follow in the air is scattered and lost to the diapire of casing 1, thereby avoid the heat to gather in the diapire of casing 1 and lead to explosion-proof groove structure 11 loses efficacy in advance.
Further, referring to fig. 2, the explosion-proof groove structure 11 includes a first explosion-proof groove 111, the first explosion-proof groove 111 includes a plurality of explosion-proof groove sections 1111, one ends of the explosion-proof groove sections 1111 are communicated with each other at a central position of the bottom wall of the case 1, and the other ends of the explosion-proof groove sections 1111 extend toward the periphery of the bottom wall of the case 1 at intervals, so that the strength of the bottom wall of the case 1 is weakened by providing the plurality of explosion-proof groove sections 1111 on the bottom wall of the case 1, thereby ensuring that the aluminum electrolytic capacitor 100 is decompressed at a predetermined position.
Further, from the middle position to the edge of the bottom wall of the housing 1, the depth of the explosion-proof tank section 1111 is gradually reduced, so that the wall thickness of the middle portion of the bottom wall of the housing 1 is the smallest, when the aluminum electrolytic capacitor 100 explodes, the middle position of the bottom wall of the housing 1 is firstly cracked to release pressure, and along with the increase of the wall thickness of the explosion-proof tank section 1111, the cracking degree of the explosion-proof tank section 1111 is gradually reduced, thereby being beneficial to controlling the cracking range of the first explosion-proof tank 111.
In order to avoid the diapire fracture scope of casing 1 is too big, explosion-proof groove structure 11 still includes the explosion-proof groove of second 112, the explosion-proof groove of second 112 is the annular setting, and encircles the outside of first explosion-proof groove 111, so sets up, through encircleing the outside of first explosion-proof groove 111 sets up the explosion-proof groove of second 112, makes first explosion-proof groove 111 fracture stops the fracture to second explosion-proof groove 112 after, so both be favorable to ensuring aluminium electrolytic capacitor 100 is in predetermined position pressure release, is favorable to preventing again explosion-proof groove structure 11 fracture scope is too big.
In order to avoid the rotation of the capacitor core in the housing 1, the aluminum electrolytic capacitor 100 further includes a limiting structure 2, the limiting structure 2 includes a positioning portion and a matching portion which are matched with each other, one of the positioning portion and the matching portion is disposed on the housing 1, and the other is disposed on the capacitor core to limit the rotation of the capacitor core in the cavity.
There are multiple embodiments of limit structure 2, for example can be pinhole limit structure 2, also can be unsmooth limit structure 2 etc. do not limit this in this application, specifically, location portion is the location muscle, cooperation portion is the cooperation groove, so through location muscle with cooperation groove cooperation restriction the rotation of capacitor core, further, in order to strengthen limit structure 2 limiting capacity, location muscle with cooperation groove edge casing 1's circumference evenly sets up a plurality ofly.
In one embodiment, the capacitor core sequentially comprises a positive aluminum foil, electrolytic paper, a negative aluminum foil and insulating packing paper from inside to outside, and the capacitor core is formed by alternately winding the positive aluminum foil, the electrolytic paper, the negative aluminum foil, the electrolytic paper and the insulating packing paper from inside to outside, and when voltage is applied to the capacitor core, electric charges are stored in the positive aluminum foil and the negative aluminum foil respectively.
The two positive leads are welded on the outer surface of the positive foil at intervals, the two negative leads are spot-welded on the outer surface of the negative aluminum foil at intervals, after the capacitor core is rolled, the two positive leads are overlapped, and the two negative leads are overlapped.
In order to prevent the capacitor core from moving in the axial direction of the housing 1, the inner side wall of the housing 1 is provided with an annular convex rib 12, correspondingly, the outer peripheral side of the capacitor core is provided with an annular groove matched with the annular convex rib 12, and the annular convex rib 12 and the annular groove are matched with each other, so that the movement of the capacitor core in the axial direction of the capacitor core is limited.
Further, the material of annular protruding muscle 12 is the elasticity material, so sets up, annular protruding muscle 12 adopts the elasticity material to when avoiding the installation the capacitor core with casing 1 damages because of rigid extrusion, thereby is favorable to the protection the capacitor core.
In order to facilitate the disassembly of the capacitor core, one end of the shell 1 is provided with an opening, the aluminum electrolytic capacitor 100 further comprises a cover body 3 detachably mounted at the opening of the shell 1, and the aluminum electrolytic capacitor is detachably mounted on the cover body 3 of the shell 1 so as to facilitate the quick disassembly of the capacitor core, thereby facilitating the replacement of the capacitor core.
The detachable structure may have various embodiments, for example, a threaded connection structure, a snap connection structure, or the like, which is not limited in this application.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation done by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (10)
1. An aluminum electrolytic capacitor, comprising:
the shell is provided with a containing cavity, and the bottom wall of the shell is partially recessed to form an explosion-proof groove structure;
the capacitor core body is arranged in the accommodating cavity, the capacitor core body is provided with an installation end corresponding to the explosion-proof groove structure, and a gap is formed between the installation end and the bottom wall of the shell; and the number of the first and second groups,
and the heat conducting paste is arranged in the gap.
2. The aluminum electrolytic capacitor of claim 1 wherein the explosion-proof groove structure comprises a first explosion-proof groove, the first explosion-proof groove comprises a plurality of explosion-proof groove sections, one ends of the explosion-proof groove sections are communicated in a crossed manner at the middle position of the bottom wall of the shell, and the other ends of the explosion-proof groove sections extend towards the periphery of the bottom wall of the shell at intervals.
3. The aluminum electrolytic capacitor as recited in claim 2, wherein the explosion-proof tank section has a gradually decreasing tank depth from a middle position to an edge of the bottom wall of the case.
4. The aluminum electrolytic capacitor of claim 2 wherein the explosion-proof groove structure further comprises a second explosion-proof tank disposed in a ring shape and surrounding the outside of the first explosion-proof tank.
5. The aluminum electrolytic capacitor of claim 1 further comprising a limiting structure, wherein the limiting structure comprises a positioning portion and an engaging portion, the positioning portion and the engaging portion are engaged with each other, one of the positioning portion and the engaging portion is disposed on the housing, and the other is disposed on the capacitor core to limit the rotation of the capacitor core in the cavity.
6. The aluminum electrolytic capacitor of claim 5 wherein the positioning portion is a positioning rib and the mating portion is a mating groove.
7. The aluminum electrolytic capacitor of claim 1, wherein the capacitor core comprises a positive aluminum foil, electrolytic paper, a negative aluminum foil and an insulating packing paper in sequence from inside to outside.
8. The aluminum electrolytic capacitor of claim 1, wherein the inner sidewall of the case is provided with an annular rib, and correspondingly, the outer peripheral side of the capacitor core is provided with an annular groove matched with the annular rib.
9. The aluminum electrolytic capacitor of claim 8 wherein the annular ribs are made of an elastic material.
10. The aluminum electrolytic capacitor of claim 1 wherein one end of the case is open;
the aluminum electrolytic capacitor also comprises a cover body which is detachably arranged at the opening of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120401207.5U CN214898120U (en) | 2021-02-23 | 2021-02-23 | Aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120401207.5U CN214898120U (en) | 2021-02-23 | 2021-02-23 | Aluminum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214898120U true CN214898120U (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120401207.5U Active CN214898120U (en) | 2021-02-23 | 2021-02-23 | Aluminum electrolytic capacitor |
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| CN (1) | CN214898120U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334463A (en) * | 2021-12-10 | 2022-04-12 | 江苏荣生电子有限公司 | Electrode foil and capacitor using same |
-
2021
- 2021-02-23 CN CN202120401207.5U patent/CN214898120U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334463A (en) * | 2021-12-10 | 2022-04-12 | 江苏荣生电子有限公司 | Electrode foil and capacitor using same |
| CN114334463B (en) * | 2021-12-10 | 2022-09-13 | 江苏荣生电子有限公司 | Capacitor with improved structure |
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