Aluminum electrolytic capacitor

Abstract

The utility model discloses an aluminum electrolytic capacitor, and relates to the technical field of capacitors. The aluminum electrolytic capacitor comprises a shell, a fixing block is arranged on the lower side of the interior of the shell, a core bag is arranged on the upper surface of the fixing block, the diameter of the core bag is smaller than that of the fixing block, a barrel with an opening in the lower end is longitudinally arranged in the shell, and the fixing block can play a role in limiting the lower end of the barrel through the structures such as the fixing block and the barrel; compared with the prior art, the core cladding can be protected through the cooperation of the fixing block and the cylinder, the structure is simple, the structure is convenient to install, the diameter of the core cladding is smaller than the diameter of the fixing block, a gap is reserved between the cylinder and the core cladding, and therefore the core cladding can be prevented from being damaged, and the service life of the core cladding is prolonged. And when the barrel body is extruded and deformed, the core package is not influenced immediately, so that the use of the core package is not influenced under the condition that the barrel body is deformed to a certain degree.

Description

Technical Field

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

[0002] Aluminum electrolytic capacitors are made of corroded and oxidized anode aluminum foil, corroded cathode aluminum foil, wound with electrolyte in between, then impregnated with working electrolyte, and then sealed in an aluminum shell. Aluminum electrolytic capacitors can be used for filtering, coupling and decoupling, power supply support, etc. in electronic circuits.

[0003] Existing aluminum electrolytic capacitors can provide pressure protection for the core package inside the capacitor through corresponding structures. For example, Chinese patent application number CN202222537941.1 discloses an aluminum electrolytic capacitor, which includes a capacitor housing, a bottom plate welded to the bottom inner wall of the capacitor housing, and a plurality of support plates fixedly installed in a ring shape on the top of the bottom plate. Two pressure blocks are welded on one side of the support plate, and one side of the pressure block is fixedly connected to the inner wall of the capacitor housing. A plurality of silicone sleeves are fixedly installed on the outside of the support plate, and a plurality of connecting blocks are fixedly installed in a ring shape on the outside of the silicone sleeve.

[0004] This capacitor is equipped with pressure blocks, support plates, inner ring fixing sleeves and other structures for core package protection and pressure resistance. Due to the large number of structures and the overall irregularity of the structure, the structure used for core package protection is inconvenient to install. Utility Model Content

[0005] Technical problems solved

[0006] In view of the deficiencies in the prior art, the utility model provides an aluminum electrolytic capacitor, which solves the problem of inconvenient installation caused by complex protective structures.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an aluminum electrolytic capacitor, comprising a shell, a fixed block is provided on the lower side of the interior of the shell, a core package is provided on the upper surface of the fixed block, the diameter of the core package is smaller than the diameter of the fixed block, a cylinder with an open lower end is longitudinally provided inside the shell, the inner wall of the lower end of the cylinder is in contact with the fixed block, and the outer surface of the lower end of the cylinder is in contact with the shell.

[0009] Preferably, a rubber block is connected to the upper surface of the cylinder.

[0010] Preferably, a limiting ring is connected to the upper side of the interior of the cylinder, and the inner side of the limiting ring is in contact with the core package.

[0011] Preferably, a plurality of holes are formed through the outer surface of the cylinder.

[0012] Preferably, the limiting ring is made of rubber.

[0013] Preferably, a fixing ring is connected to the outer side of the upper surface of the cylinder, and a clamping block adapted to the fixing ring is provided on the lower surface of the rubber block.

[0014] Preferably, the outer surface of the cylinder is coated with rubber.

[0015] Beneficial effects

[0016] The utility model provides an aluminum electrolytic capacitor with the following beneficial effects:

[0017] By setting the fixed block, cylinder and other structures, the fixed block can limit the lower end of the cylinder. When the outer shell is squeezed, the cylinder will bear the force transmitted by the outer shell, thereby protecting the core package. Compared with the existing technology, the core package can be protected by cooperating with the fixed block and the cylinder. The structure is simpler, making the installation of the structure more convenient. Since the diameter of the core package is smaller than the diameter of the fixed block, a gap is left between the cylinder and the core package. When the cylinder is squeezed and deformed, it will not immediately affect the core package, so that the use of the core package will not be affected even if the cylinder produces a certain deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the shell of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the cylinder of the utility model;

[0021] Figure 4 This is a schematic diagram of the fixed block structure of the utility model.

[0022] In the figure: 1. Shell; 2. Fixing block; 3. Core package; 4. Cylinder; 5. Rubber block; 6. Limiting ring; 7. Hole; 8. Fixing ring; 9. Block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4The utility model provides a technical solution: an aluminum electrolytic capacitor, comprising a shell 1, a fixed block 2 is provided on the lower side of the interior of the shell 1, a core package 3 is provided on the upper surface of the fixed block 2, the diameter of the core package 3 is smaller than the diameter of the fixed block 2, a cylinder 4 with an open lower end is longitudinally provided inside the shell 1, the inner wall of the lower end of the cylinder 4 is in contact with the fixed block 2, and the outer surface of the lower end of the cylinder 4 is in contact with the shell 1, the core package 3 is wound by two aluminum foils and an electrolytic paper, the electrolytic paper is located between the two aluminum foils, one of the two aluminum foils is a cathode and the other is an anode, which is the existing technology, two leads are provided on the lower surface of the shell 1, and the core package 3 is located inside the cylinder 4.

[0025] During operation, since the fixing block 2 fits against the inner wall of the lower end of the cylinder 4, the fixing block 2 can limit the lower end of the cylinder 4. When the outer shell 1 is squeezed, the squeezing force will be transmitted to the cylinder 4, causing the cylinder 4 to bear the squeezing force. Since the diameter of the core package 3 is smaller than the diameter of the fixing block 2, a gap is left between the cylinder 4 and the core package 3. When the cylinder 4 is deformed by pressure, the deformed part of the cylinder 4 will enter the gap. When the deformation of the cylinder 4 does not exceed the size of the gap, it will not affect the core package 3.

[0026] See also Figure 1-4 The utility model provides a technical solution: the upper surface of the cylinder 4 is connected to a rubber block 5, and the rubber block 5 is located on the upper side of the inner part of the shell 1.

[0027] During operation, the rubber block 5 can provide a seal between the cylinder 4 and the outer shell 1 .

[0028] See also Figure 1-4 The utility model provides a technical solution: the upper side of the inner part of the cylinder 4 is connected to a limiting ring 6, and the inner side of the limiting ring 6 is in contact with the core package 3.

[0029] During operation, the limiting ring 6 can limit the core package 3 and ensure that the core package 3 is located at the center of the fixing block 2.

[0030] See also Figure 1-4 The utility model provides a technical solution: a plurality of holes 7 are opened through the outer surface of the cylinder 4.

[0031] During operation, the heat generated by the core package 3 can be dissipated out of the cylinder 4 through the arrangement of the holes 7 , thereby preventing the heat generated by the core package 3 from being retained in the cylinder 4 .

[0032] See also Figure 1-4 The utility model provides a technical solution: the limiting ring 6 is made of rubber.

[0033] During operation, the limiting ring 6 made of rubber is relatively soft, and is not likely to cause damage to the core package 3 when the limiting ring 6 is deformed.

[0034] See also Figure 1-4 The utility model provides a technical solution: a fixing ring 8 is connected to the outer side of the upper surface of the cylinder 4, and a clamping block 9 adapted to the fixing ring 8 is provided on the lower surface of the rubber block 5, and the outer surface of the clamping block 9 fits with the inner side of the fixing ring 8.

[0035] During operation, the connection between the rubber block 5 and the cylinder 4 is relatively stable due to the arrangement of the fixing ring 8 and the clamping block 9 .

[0036] See also Figure 1-4 The utility model provides a technical solution: the outer surface of the cylinder 4 is covered with rubber.

[0037] During operation, through the setting of the rubber, when the shell 1 is deformed, the rubber can play a buffering role between the cylinder 4 and the shell 1.

[0038] In summary, when the shell 1 is squeezed, the squeezing force will be transmitted to the cylinder 4, causing the cylinder 4 to withstand the squeezing force. At the same time, the rubber on the outer surface of the cylinder 4 can play a buffering role. Since the diameter of the core package 3 is smaller than the diameter of the fixed block 2, a gap is left between the cylinder 4 and the core package 3. When the cylinder 4 is deformed by pressure, the deformed part of the cylinder 4 will enter the gap. When the deformation of the cylinder 4 does not exceed the size of the gap, it will not affect the core package 3.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aluminum electrolytic capacitor, comprising a housing (1), characterized in that: A fixing block (2) is provided on the lower side of the interior of the shell (1), a core package (3) is provided on the upper surface of the fixing block (2), the diameter of the core package (3) being smaller than the diameter of the fixing block (2), and a cylinder (4) with an open lower end is longitudinally provided inside the shell (1), the inner wall of the lower end of the cylinder (4) is in contact with the fixing block (2), and the outer surface of the lower end of the cylinder (4) is in contact with the shell (1).

2. The aluminum electrolytic capacitor according to claim 1, wherein: The upper surface of the cylinder (4) is connected with a rubber block (5).

3. The aluminum electrolytic capacitor according to claim 1, wherein: The upper inner side of the cylinder (4) is connected to a limiting ring (6), and the inner side of the limiting ring (6) is in contact with the core package (3).

4. The aluminum electrolytic capacitor according to claim 1, wherein: A plurality of holes (7) are provided through the outer surface of the cylinder (4).

5. The aluminum electrolytic capacitor according to claim 3, characterized in that: The limiting ring (6) is made of rubber.

6. The aluminum electrolytic capacitor according to claim 2, characterized in that: A fixing ring (8) is connected to the outer side of the upper surface of the cylinder (4), and a clamping block (9) adapted to the fixing ring (8) is provided on the lower surface of the rubber block (5).

7. The aluminum electrolytic capacitor according to claim 1, characterized in that: The outer surface of the cylinder (4) is covered with rubber.

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