Anti-short-circuit electrolytic capacitor

Abstract

The utility model relates to the technical field of electrolytic capacitor short circuit prevention, in particular to a short circuit prevention electrolytic capacitor which comprises an aluminum shell. A side edge protection assembly is arranged on the side wall of the aluminum shell, a core body is arranged in the aluminum shell, an upper protection assembly and a lower protection assembly are arranged at the upper end and the lower end of the core body respectively, and the side edge protection assembly comprises a plurality of embedded grooves formed in the side wall of the aluminum shell in an annular rolling mode and a plurality of U-shaped strips fixedly connected to the side wall of the aluminum shell. According to the utility model, the plurality of embedding grooves are arranged on the outer wall of the aluminum shell in a rolling manner, and the supporting rings are fixed in the embedding grooves, so that the structural compressive strength of the electrolytic capacitor is enhanced, and an anti-collision structure is added to the electrolytic capacitor under the action of the plurality of U-shaped strips, so that the anti-collision performance of the electrolytic capacitor is improved, and the service life of the electrolytic capacitor is prolonged. The core body and the aluminum shell are isolated through the rubber protection sleeve, the hard insulation sleeve and the embedding part, so that the insulation effect is achieved, and the cushioning effect can be provided.

Description

Technical Field

[0001] This utility model relates to the field of short-circuit protection technology for electrolytic capacitors, specifically a short-circuit protection electrolytic capacitor. Background Technology

[0002] An electrolytic capacitor is an electronic container that mainly uses metal foil as the anode and an oxide film produced on its surface as the core, combined with electrolyte and cathode conductive materials. It is used to store charge in electronic circuits, filter out AC ripple in the power supply, and thus achieve voltage stabilization.

[0003] Currently, electrolytic capacitors are used in production machines to separate the electrolytic core from the aluminum shell using materials such as gaskets to prevent short circuits caused by contact between the electrolytic core and the aluminum shell. However, existing electrolytic capacitors are easily subjected to impacts and pressure during production and use. The aluminum shell provides poor protection, and after being impacted or pressured, the aluminum shell is prone to deformation, causing misalignment of the insulating material and ultimately leading to a short circuit. Therefore, a short-circuit resistant electrolytic capacitor is proposed to address the above problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, and addressing the problems of poor aluminum shell protection and the ease with which electrolytic capacitors deform and short-circuit when subjected to pressure or impact, this invention proposes a short-circuit resistant electrolytic capacitor.

[0005] The technical solution adopted by this utility model to solve its technical problem is: the short-circuit protection electrolytic capacitor of this utility model includes an aluminum shell; a side protection component is provided on the side wall of the aluminum shell, a core is provided inside the aluminum shell, an upper protection component and a lower protection component are respectively provided at the upper and lower ends of the core, and an end protection component is provided at the upper port of the aluminum shell.

[0006] The core is provided with a positive terminal pin and a negative terminal pin, and the top ends of the positive terminal pin and the negative terminal pin extend and are positioned above the end protection component;

[0007] The side protection assembly includes multiple fitting grooves rolled in an annular shape on the side wall of the aluminum shell and multiple U-shaped strips fixed to the side wall of the aluminum shell, and the U-shaped strips are vertically fixed to the outer wall of the aluminum shell and arranged in an annular array.

[0008] Each of the fitting grooves is fixed with a support ring, and the support ring is located inside the U-shaped strip of the annular array.

[0009] Preferably, a rubber protective sleeve is provided on the inner wall of the aluminum shell, a cavity is provided inside the rubber protective sleeve, a rigid insulating sleeve is provided inside the cavity, and the cavity is fitted and fixed between the upper protective component and the lower protective component under the support of the rigid insulating sleeve, and the core is disposed inside the rubber protective sleeve.

[0010] Preferably, the outer side of the rubber protective sleeve is provided with multiple fitting parts, and the fitting parts abut against the inner wall of the aluminum shell and are arranged alternately with the multiple support rings. A metal wire protective mesh is provided between the rubber protective sleeve and the inner wall of the aluminum shell, and the metal wire protective mesh is fixed to the inner wall of the aluminum shell.

[0011] Preferably, the lower protective assembly includes a lower sealing plug disposed at the bottom of the aluminum shell, the lower sealing plug having a lower positioning groove that fits into the lower port of the rubber protective sleeve, and the core being disposed above the lower sealing plug.

[0012] Preferably, the upper protective component includes an upper sealing plug disposed in the upper opening of the aluminum shell, and an upper positioning groove is provided below the upper sealing plug to fit into the upper port of the rubber protective sleeve. The upper positioning groove has two No. 2 through holes, and the positive electrode pin and the negative electrode pin are respectively disposed through the two No. 2 through holes.

[0013] Preferably, the end protection assembly includes an end cap fixed to the upper port of the aluminum shell, and the end cap is located above the upper sealing plug. Two through holes No. 1 are opened through the end cap, and an insulating sleeve is provided in each of the two through holes No. 1. The bottom ends of the two insulating sleeves extend into the two through holes No. 2, and the positive electrode pin and the negative electrode pin are respectively provided through the two insulating sleeves.

[0014] Preferably, a positioning plate is provided on the outer wall of both insulating sleeves, and the positioning plate is located between the end cap and the second through hole.

[0015] The advantages of this utility model are:

[0016] 1. This utility model enhances the structural compressive strength of the electrolytic capacitor by rolling multiple fitting grooves on the outer wall of the aluminum shell and fixing support rings in the fitting grooves. With the help of multiple U-shaped strips, it adds an anti-collision structure to the electrolytic capacitor and further improves its compressive strength. The U-shaped strips also enhance the heat dissipation effect of the electrolytic capacitor.

[0017] 2. This utility model isolates the core from the aluminum shell through a rubber protective sleeve, a hard insulating sleeve, and an interlocking part to achieve insulation and provide shock absorption. A metal wire protective mesh is set between the rubber protective sleeve and the aluminum shell, which improves the tear resistance of the aluminum shell and reduces the probability of the aluminum shell breaking due to compression. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the first three-dimensional structure in this embodiment;

[0020] Figure 2 This is an enlarged cross-sectional view of the main internal structure of the aluminum shell in this embodiment;

[0021] Figure 3 This is a cross-sectional enlarged schematic diagram of the first three-dimensional structure in this embodiment;

[0022] Figure 4 This is an enlarged schematic diagram of region A in the sectional view of the first three-dimensional structure in this embodiment;

[0023] Figure 5 This is an enlarged schematic diagram of region B in the cross-sectional view of the first three-dimensional structure in this embodiment;

[0024] Figure 6 This is an enlarged schematic diagram of region C in the cross-sectional view of the first three-dimensional structure in this embodiment.

[0025] In the diagram: 1. Aluminum shell; 11. Positive pin; 12. Negative pin; 13. Core;

[0026] 2. Side protection assembly; 21. Fitting groove; 22. Support ring; 23. U-shaped strip; 24. Metal wire mesh; 25. Rubber protective sleeve; 26. Cavity; 27. Rigid insulating sleeve; 28. Fitting part;

[0027] 3. End protection assembly; 31. End cap; 32. No. 1 through hole; 33. Insulating sleeve; 34. Positioning plate;

[0028] 4. Upper protective assembly; 41. Upper sealing plug; 42. Upper positioning groove; 43. No. 2 through hole;

[0029] 5. Lower protective component; 51. Lower sealing plug; 52. Lower positioning groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] For examples, please refer to Figure 1-6 As shown, a short-circuit resistant electrolytic capacitor includes an aluminum shell 1; a side protection component 2 is provided on the side wall of the aluminum shell 1, a core 13 is provided inside the aluminum shell 1, an upper protection component 4 and a lower protection component 5 are respectively provided at the upper and lower ends of the core 13, and an end protection component 3 is provided at the upper port of the aluminum shell 1.

[0032] The core 13 is provided with a positive electrode pin 11 and a negative electrode pin 12, and the top ends of the positive electrode pin 11 and the negative electrode pin 12 extend and are disposed above the end protection component 3.

[0033] The side protection component 2 includes multiple fitting grooves 21 rolled in an annular shape on the side wall of the aluminum shell 1 and multiple U-shaped strips 23 fixed to the side wall of the aluminum shell 1. The U-shaped strips 23 are vertically fixed to the outer wall of the aluminum shell 1 and are arranged in an annular array.

[0034] Each of the fitting grooves 21 is fixed with a support ring 22, and the support ring 22 is located inside the U-shaped strips 23 of the annular array.

[0035] A rubber protective sleeve 25 is provided on the inner wall of the aluminum shell 1. A cavity 26 is provided inside the rubber protective sleeve 25. A rigid insulating sleeve 27 is provided inside the cavity 26. The cavity 26 is fitted and fixed between the upper protective component 4 and the lower protective component 5 under the support of the rigid insulating sleeve 27. The core 13 is provided inside the rubber protective sleeve 25.

[0036] The rubber protective sleeve 25 has multiple fitting parts 28 on its outer side, and the fitting parts 28 abut against the inner wall of the aluminum shell 1 and are interleaved with the multiple support rings 22. A metal wire protective mesh 24 is provided between the rubber protective sleeve 25 and the inner wall of the aluminum shell 1, and the metal wire protective mesh 24 is fixed to the inner wall of the aluminum shell 1.

[0037] The lower protective component 5 includes a lower sealing plug 51 disposed at the bottom of the aluminum shell 1. The lower sealing plug 51 has a lower positioning groove 52 that fits into the lower port of the rubber protective sleeve 25. The core 13 is disposed above the lower sealing plug 51.

[0038] The upper protective component 4 includes an upper sealing plug 41 disposed in the upper opening of the aluminum shell 1. The upper sealing plug 41 has an upper positioning groove 42 that fits into the upper port of the rubber protective sleeve 25. The upper positioning groove 42 has two second through holes 43, and the positive electrode pin 11 and the negative electrode pin 12 are respectively disposed in the two second through holes 43.

[0039] The end protection assembly 3 includes an end cap 31 fixed to the upper port of the aluminum shell 1, and the end cap 31 is located above the upper sealing plug 41. Two first through holes 32 are opened through the end cap 31. An insulating sleeve 33 is provided in each of the two first through holes 32, and the bottom ends of the two insulating sleeves 33 extend into the two second through holes 43 respectively. The positive electrode pin 11 and the negative electrode pin 12 are respectively inserted through the two insulating sleeves 33.

[0040] Both insulating sleeves 33 are provided with positioning discs 34 on their outer walls, and the positioning discs 34 are located between the end cap 31 and the second through hole 43.

[0041] During operation, existing electrolytic capacitors are easily subjected to impacts and pressure during production and use. The aluminum shell provides poor protection, and after being impacted and pressured, the aluminum shell is prone to deformation and misalignment of the insulating material, ultimately leading to a short circuit. In this solution, multiple interlocking grooves 21 are rolled and set on the outer wall of the aluminum shell 1, and a support ring 22 is fixed in the interlocking grooves 21 to enhance the structural compressive strength of the electrolytic capacitor. With the help of multiple U-shaped strips 23, a protective structure is added to the outer wall of the aluminum shell 1 to provide impact protection for the electrolytic capacitor. At the same time, it can further improve the compressive strength. In addition, the U-shaped strips 23 are arranged in a U-shape to increase the heat dissipation effect of the electrolytic capacitor.

[0042] The core 13 is isolated from the aluminum shell 1 by the rubber protective sleeve 25, the hard insulating sleeve 27 and the fitting part 28 to achieve insulation and provide shock absorption. A metal wire protective mesh 24 is set between the rubber protective sleeve 25 and the aluminum shell 1. The metal wire protective mesh 24 improves the tear resistance of the aluminum shell 1 and reduces the probability of the aluminum shell 1 breaking due to compression.

[0043] Supported by the upper sealing plug 41, the end cap 31 is fixed at the upper port of the aluminum shell 1 to press and fix the positioning plate 34 between the end cap 31 and the upper sealing plug 41, thereby fixing the insulating sleeve 33 and using the insulating sleeve 33 to isolate the positive pin 11, the negative pin 12 and the end cap 31 to prevent the positive pin 11 and the negative pin 12 from being disconnected and short-circuited.

[0044] This combination achieves the function of preventing short circuits in electrolytic capacitors, avoiding short circuits caused by deformation due to squeezing or impact, and effectively improving the structural strength of electrolytic capacitors.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A short-circuit prevention electrolytic capacitor, characterized by: Includes an aluminum shell (1); a side protection component (2) is provided on the side wall of the aluminum shell (1); a core (13) is provided inside the aluminum shell (1); an upper protection component (4) and a lower protection component (5) are respectively provided at the upper and lower ends of the core (13); and an end protection component (3) is provided at the upper port of the aluminum shell (1). The core (13) is provided with a positive electrode pin (11) and a negative electrode pin (12), and the top ends of the positive electrode pin (11) and the negative electrode pin (12) extend above the end protection component (3); The side protection assembly (2) includes a plurality of fitting grooves (21) rolled in an annular shape on the side wall of the aluminum shell (1) and a plurality of U-shaped strips (23) fixed to the side wall of the aluminum shell (1), and the U-shaped strips (23) are vertically fixed to the outer wall of the aluminum shell (1) and arranged in an annular array. Each of the fitting grooves (21) is fixed with a support ring (22), and the support ring (22) is located inside the U-shaped strip (23) of the annular array.

2. A short circuit prevention electrolytic capacitor according to claim 1, characterized in that: A rubber protective sleeve (25) is provided on the inner wall of the aluminum shell (1). A cavity (26) is provided inside the rubber protective sleeve (25). A rigid insulating sleeve (27) is provided inside the cavity (26). The cavity (26) is fitted and fixed between the upper protective component (4) and the lower protective component (5) under the support of the rigid insulating sleeve (27). The core (13) is provided inside the rubber protective sleeve (25).

3. A short circuit prevention electrolytic capacitor according to claim 2, characterized in that: The rubber protective sleeve (25) has multiple fitting parts (28) on its outer side, and the fitting parts (28) abut against the inner wall of the aluminum shell (1) and are interleaved with the multiple support rings (22). A metal wire protective net (24) is provided between the rubber protective sleeve (25) and the inner wall of the aluminum shell (1), and the metal wire protective net (24) is fixed on the inner wall of the aluminum shell (1).

4. A short circuit prevention electrolytic capacitor according to claim 1, characterized in that: The lower protective assembly (5) includes a lower sealing plug (51) disposed at the bottom of the aluminum shell (1), and the lower sealing plug (51) is provided with a lower positioning groove (52) that fits into the lower port of the rubber protective sleeve (25). The core (13) is disposed above the lower sealing plug (51).

5. A short circuit prevention electrolytic capacitor according to claim 1, characterized in that: The upper protective component (4) includes an upper sealing plug (41) disposed in the upper opening of the aluminum shell (1). The upper sealing plug (41) has an upper positioning groove (42) that fits into the upper port of the rubber protective sleeve (25). The upper positioning groove (42) has two No. 2 through holes (43), and the positive electrode pin (11) and the negative electrode pin (12) are respectively disposed in the two No. 2 through holes (43).

6. A short circuit prevention electrolytic capacitor according to claim 1, characterized in that: The end protection assembly (3) includes an end cap (31) fixed to the upper port of the aluminum shell (1), and the end cap (31) is located above the upper sealing plug (41). Two first through holes (32) are opened through the end cap (31), and an insulating sleeve (33) is provided in each of the two first through holes (32). The bottom ends of the two insulating sleeves (33) extend into the two second through holes (43), and the positive electrode pin (11) and the negative electrode pin (12) are respectively installed through the two insulating sleeves (33).

7. A short circuit prevention electrolytic capacitor according to claim 6, characterized in that: Two said insulating rubber sleeves (33) are provided with positioning discs (34) on their outer walls, and the positioning discs (34) are located between the end cover (31) and the second through hole (43).

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