High-strength aluminum electrolytic capacitor

Abstract

The utility model relates to a high-strength aluminum electrolytic capacitor which comprises a shell, a hollow cavity used for being filled with liquid electrolyte is arranged in the shell, two pins are arranged at the bottom of the shell, the tops of the two pins extend into the cavity and are connected with aluminum foil, a cross-shaped groove facilitating pressure relief is formed in the top of the shell, and the cross-shaped groove is connected with the aluminum foil. The top of the inner side wall of the cavity is connected with a supporting piece. The utility model relates to the technical field of capacitors. According to the high-strength aluminum electrolytic capacitor, the supporting piece used for supporting the top of the shell is arranged at the top of the cavity, so that when the top of the shell is extruded to sink inwards, the sinking of the shell is prevented by using the supporting of the supporting piece, and the compressive strength of the capacitor can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a high-strength aluminum electrolytic capacitor. Background Art

[0002] Two conductors close to each other, with a non-conductive insulating medium in between, constitute a capacitor. Aluminum electrolytic capacitors are made by winding absorbent paper soaked in a paste electrolyte between two aluminum foils, with a thin oxide film as the dielectric. Because the oxide film has a unidirectional conductive property, electrolytic capacitors have polarity.

[0003] In the prior art, capacitors will generate heat when working for a long time, and as the heat accumulates, the capacitors will expand or crack. Therefore, a cross-shaped groove is designed on the top of the capacitor. When the pressure is high, the top cracks to release the pressure and avoid explosion. However, due to the design of the cross-shaped notch on the top, the compressive capacity of the outer wall of the capacitor is reduced, so that the top of the capacitor is easily deformed when under pressure, causing electrolyte leakage and safety hazards. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-strength aluminum electrolytic capacitor so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A high-strength aluminum electrolytic capacitor comprises a shell, wherein a cavity for filling a liquid electrolyte is hollowly arranged in the shell, two pins are arranged at the bottom of the shell, the tops of the two pins extend into the cavity and are connected to aluminum foil, a cross groove is opened on the top of the shell for facilitating pressure relief, and a support is connected to the top of the inner wall of the cavity.

[0007] By adopting the above technical solution, by arranging a support member at the top of the cavity, the top of the shell can be supported so that the top of the shell will not be concave when squeezed, thereby improving the compressive strength of the capacitor.

[0008] In a preferred example, the utility model can be further configured as follows: the cross groove divides the top of the shell into four areas, four support members are provided, and the four support members are respectively located below the four areas.

[0009] By adopting the above technical solution, the supporting effect can be improved, and the cross groove can be prevented from sinking into the inside of the shell when the top of the shell is squeezed.

[0010] In a preferred example, the present invention can be further configured as follows: a support sleeve is provided in the cavity, and the outer wall of the support sleeve is in contact with the inner wall of the cavity.

[0011] By adopting the above technical solution, the support sleeve can provide support to the side wall of the shell, thereby enhancing the compressive strength of the side wall of the shell.

[0012] In a preferred example, the utility model can be further configured as follows: an avoidance groove is opened downward from the top center of the support sleeve, and the aluminum foil and a section of the pin located in the cavity are both arranged in the avoidance groove.

[0013] By adopting the above technical solution and providing an avoidance groove, it is possible to avoid the support sleeve from contacting the aluminum foil and affecting the contact area between the aluminum foil and the liquid electrolyte, thereby avoiding interference with the performance of the capacitor.

[0014] In a preferred example, the utility model can be further configured as follows: a plurality of through grooves are opened on the top of the support sleeve, and the plurality of through grooves are located on both sides of the avoidance groove.

[0015] By adopting the above technical solution, the volume of the support sleeve can be reduced by providing a plurality of through grooves, so that more liquid electrolyte can be filled in the cavity.

[0016] In a preferred example, the utility model can be further configured as follows: a rubber sleeve is provided on the outer wall of the shell, and the top and bottom of the rubber sleeve are respectively avoided by the cross groove and the pin.

[0017] By adopting the above technical solution, the shell can be protected by the provided rubber sleeve to prevent the shell from being scratched, thereby preventing the surface performance from being reduced and the compressive strength of the capacitor from being reduced.

[0018] In summary, the utility model includes at least one of the following beneficial technical effects:

[0019] 1. This high-strength aluminum electrolytic capacitor has a support member for supporting the top of the shell at the top of the cavity, so that when the top of the shell is squeezed and recessed inward, the support of the support member can prevent the shell from recessing, thereby enhancing the compressive strength of the capacitor;

[0020] 2. This high-strength aluminum electrolytic capacitor can enhance the compressive strength of the side wall of the shell by setting the support member, avoid deformation of the side wall of the shell when it is compressed, and cause cracks at the cross groove, thereby further improving the compressive strength of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The utility model is a structural schematic diagram of a high-strength aluminum electrolytic capacitor.

[0023] Figure 2 The utility model is a schematic diagram of the internal structure of a high-strength aluminum electrolytic capacitor.

[0024] Figure 3 The utility model is a structural schematic diagram of a support sleeve in a high-strength aluminum electrolytic capacitor.

[0025] In the figure, 1. shell; 2. cavity; 3. pin; 4. aluminum foil; 5. cross slot; 6. support member; 7. support sleeve; 8. avoidance groove; 9. through slot; 10. rubber sleeve. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings. Example

[0027] Reference Figure 1 - Figure 3 The utility model discloses a high-strength aluminum electrolytic capacitor, comprising a shell 1, wherein a cavity 2 for filling a liquid electrolyte is hollowly arranged in the shell 1, two pins 3 are arranged at the bottom of the shell 1, the tops of the two pins 3 extend into the cavity 2 and are connected with an aluminum foil 4, a cross groove 5 is opened on the top of the shell 1 for facilitating pressure relief, and a support 6 is connected to the top of the inner wall of the cavity 2.

[0028] In this embodiment, the cavity 2 provided in the shell 1 can be used to fill with liquid electrolyte, and then two pins 3 are inserted into the cavity 2, and an aluminum foil 4 is connected to one end of the pin 3 located in the cavity 2, so that the capacitor can store charge through the aluminum foil 4 when in use. When the capacitor generates heat during use and the pressure in the cavity 2 increases, the shell 1 will expand due to the compression of the pressure. Therefore, in order to avoid the explosion of the shell 1, a cross groove 5 is provided on the top of the shell 1 to weaken the surface properties of the top of the shell 1 to weaken the compressive strength. Then, the pressure can be released through the cross groove 5 on the top of the shell 1, which can effectively avoid the explosion of the capacitor.

[0029] The cross groove 5 can effectively prevent the capacitor from exploding, but it also reduces the pressure resistance of the shell 1, which leads to a reduction in the pressure resistance of the top of the shell 1. When the top of the shell 1 is under pressure, the cross groove 5 is sunken into the shell 1 due to its weak surface performance, which may cause cracks in the cross groove 5 and cause the liquid electrolyte to flow out and cause an accident. Therefore, a support member 6 is provided on the top of the cavity 2. The support member 6 provides support for the top of the shell 1, thereby strengthening the compressive strength of the top of the shell 1, which can effectively improve the compressive strength of the capacitor.

[0030] In a further preferred embodiment of the present invention, Figure 2 As shown, the cross groove 5 divides the top of the housing 1 into four areas, and four support members 6 are provided, and the four support members 6 are respectively located under the four areas.

[0031] In this embodiment, when the top of the shell 1 is subjected to pressure, the area where the cross groove 5 is located will be recessed into the inside of the shell 1 due to its low surface strength, and the cross groove 5 divides the top of the shell 1 into four areas. Therefore, when this area is recessed, the four areas will be broken and separated at the cross groove 5. Therefore, by arranging the support member 6 below the four areas, the four areas are supported by the support member 6 and cannot be recessed, thereby increasing the compressive strength of the capacitor.

[0032] Because the support member 6 is arranged in the cavity 2 to support the shell 1, the pressure-bearing capacity of the shell 1 can be enhanced. When the pressure in the cavity 2 increases, the pressure can still be easily discharged through the cross groove 5, so it will not affect the pressure relief of the capacitor.

[0033] In a further preferred embodiment of the present invention, Figure 2 As shown, a support sleeve 7 is disposed in the cavity 2 , and the outer wall of the support sleeve 7 is in contact with the inner wall of the cavity 2 .

[0034] In this embodiment, the top of the shell 1 is supported by the support member 6 to improve the compressive strength. However, when the side wall of the shell 1 is squeezed and deformed, the top and bottom of the shell 1 will also be deformed due to the deformation of the side wall, which will cause the cross groove 5 to be pulled by the deformation and produce cracks. Therefore, a support sleeve 7 is provided in the cavity 2 to strengthen the compressive resistance of the side wall of the shell 1, which can further improve the strength of the capacitor.

[0035] In a further preferred embodiment of the present invention, Figure 3 As shown, a relief groove 8 is opened downward from the top center of the support sleeve 7 , and the aluminum foil 4 and a section of the pin 3 located in the cavity 2 are both arranged in the relief groove 8 .

[0036] In this embodiment, because the setting of the support sleeve 7 will reduce the space in the cavity 2, it will interfere with the setting of the pin 3 and the aluminum foil 4 and affect the performance of the capacitor. Therefore, an avoidance groove 8 is provided in the support sleeve 7, so that the pin 3 and the aluminum foil 4 can be normally arranged in the cavity 2 to avoid the aluminum foil 4 from contacting the support sleeve 7 and reducing the contact area with the liquid electrolyte.

[0037] In a further preferred embodiment of the present invention, Figure 3 As shown, a plurality of through slots 9 are formed on the top of the support sleeve 7 , and the plurality of through slots 9 are located on both sides of the avoidance slot 8 .

[0038] In this embodiment, because the support sleeve 7 has a volume, when the support sleeve 7 is arranged in the cavity 2, the liquid electrolyte will inevitably be reduced, thereby reducing the performance of the capacitor. Therefore, a plurality of through grooves 9 are opened on the support sleeve 7 to increase the storage capacity of the liquid electrolyte as much as possible to improve the performance of the capacitor.

[0039] In a further preferred embodiment of the present invention, Figure 2 As shown, the outer wall of the housing 1 is provided with a rubber sleeve 10 , and the top and bottom of the rubber sleeve 10 are respectively avoided by the cross groove 5 and the pin 3 .

[0040] In this embodiment, when the shell 1 is scratched, the outer wall coating of the shell 1 will be damaged, causing the shell 1 to come into contact with the air and oxidize, thereby reducing the outer wall strength of the shell 1, and making the shell 1 more easily deformed. Therefore, a rubber sleeve 10 is provided to provide protection for the outer wall of the shell 1, reduce the scratches on the shell 1, and effectively improve the service life of the capacitor.

[0041] The provision of the rubber sleeve 10 can absorb part of the pressure by utilizing the elasticity of the rubber sleeve 10 when the shell 1 is squeezed, thereby reducing the pressure on the shell 1 and further improving the compressive strength of the shell 1.

[0042] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-strength aluminum electrolytic capacitor, comprising a housing (1), characterized in that: The shell (1) is hollow and provided with a cavity (2) for filling a liquid electrolyte. Two pins (3) are provided at the bottom of the shell (1). The tops of the two pins (3) extend into the cavity (2) and are connected to an aluminum foil (4). A cross groove (5) is provided at the top of the shell (1) for facilitating pressure relief. A support member (6) is connected to the top of the inner wall of the cavity (2).

2. A high-strength aluminum electrolytic capacitor according to claim 1, characterized in that: The cross groove (5) divides the top of the shell (1) into four areas, and four support members (6) are provided, and the four support members (6) are respectively located below the four areas.

3. A high-strength aluminum electrolytic capacitor according to claim 1, characterized in that: A support sleeve (7) is arranged in the cavity (2), and an outer wall of the support sleeve (7) is in contact with an inner wall of the cavity (2).

4. A high-strength aluminum electrolytic capacitor according to claim 3, characterized in that: A relief groove (8) is provided downwardly from the top center of the support sleeve (7), and the aluminum foil (4) and a section of the pin (3) located in the cavity (2) are both arranged in the relief groove (8).

5. A high-strength aluminum electrolytic capacitor according to claim 4, characterized in that: A plurality of through slots (9) are provided on the top of the support sleeve (7), and the plurality of through slots (9) are located on both sides of the avoidance slot (8).

6. The high-strength aluminum electrolytic capacitor according to claim 1, characterized in that: The outer wall of the housing (1) is provided with a rubber sleeve (10), and the top and bottom of the rubber sleeve (10) are respectively avoided by the cross groove (5) and the pin (3).

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