Anti-expansion low-temperature-resistant aluminum electrolytic capacitor with multi-layer protection

Abstract

The utility model relates to the technical field of capacitors, and discloses a multi-layer protection anti-expansion low-temperature-resistant aluminum electrolytic capacitor, which is characterized in that the outer side of an aluminum shell is wrapped with a PVC (polyvinyl chloride) sleeve, a core bag is arranged in the aluminum shell, and the inner side wall of the aluminum shell is provided with a reinforcing assembly; according to the utility model, the sealing sleeve wraps the outer side of the core cladding, the sealing effect of the core cladding can be improved, the influence of external temperature on the capacitor is reduced, the reinforcing layer is arranged at the outer side of the sealing sleeve, the core cladding can be supported, the swelling amount of the core cladding is reduced, and the cavity is arranged in the buffer layer, so that the deformation of the core cladding can be buffered, and the service life of the capacitor is prolonged. The deformation of the aluminum shell is effectively reduced; according to the capacitor, the first heat insulation coating and the second heat insulation coating are arranged on the aluminum shell, so that the aluminum shell has a good heat insulation effect, high or low temperature can be isolated, the influence of temperature change on the capacitor is reduced, and the stability of the capacitor structure is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a multi-layered protection anti-expansion and low-temperature resistant aluminum electrolytic capacitor. Background Art

[0002] Two conductors close to each other, with a non-conductive insulating medium in between, form a capacitor. When a voltage is applied between the two plates of a capacitor, the capacitor will store charge. The capacitance of a capacitor is numerically equal to the ratio of the charge on one conductive plate to the voltage between the two plates. The basic unit of the capacitance of a capacitor is farad (F). In circuit diagrams, the letter C is usually used to represent a capacitor element.

[0003] When a capacitor is used at a temperature lower than normal operation, its capacity, loss, and leakage current will deteriorate, affecting the use of the capacitor and even losing its proper function, causing immeasurable losses to the entire electronic equipment. At the same time, the capacitor is prone to expansion and deformation under long-term use or overload conditions, which not only affects the performance of the capacitor product, but also reduces the service life of the capacitor. For this reason, a multi-layer protection anti-expansion and low-temperature resistant aluminum electrolytic capacitor is proposed. Utility Model Content

[0004] The utility model aims to provide a multi-layered protection anti-expansion low-temperature resistant aluminum electrolytic capacitor to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a multi-layered protective anti-expansion low-temperature resistant aluminum electrolytic capacitor, comprising an aluminum shell, the outer side of the aluminum shell is wrapped with a PVC sleeve, the inside of the aluminum shell is provided with a core package, and the inner side wall of the aluminum shell is provided with a reinforcement component;

[0006] The reinforcement component includes a buffer layer, a reinforcement layer and a sealing sleeve, the buffer layer is fixedly connected to the inner wall of the aluminum shell, a cavity is arranged inside the buffer layer, the reinforcement layer is fixedly connected to the outer side of the buffer layer, the sealing sleeve is fixedly sleeved on the outer side of the core package, the outer side of the aluminum shell is wrapped with a first thermal insulation coating, the bottom of the aluminum shell is provided with a second thermal insulation coating, the interior of the aluminum shell is provided with a rubber pad at the top of the core package, and a convex ring is provided on the top of the aluminum shell.

[0007] As a further preferred embodiment of the technical solution: an anode connection column and a cathode connection column are provided on the core package, and the anode connection column and the cathode connection column respectively penetrate the bottom of the rubber pad.

[0008] As a further preferred embodiment of the present technical solution: the core package includes an anode aluminum foil, a first electrolytic paper, a cathode aluminum foil and a second electrolytic paper, the first electrolytic paper is attached to one side of the anode aluminum foil, the cathode aluminum foil is attached to a side of the first electrolytic paper away from the anode aluminum foil, and the second electrolytic paper is attached to a side of the cathode aluminum foil away from the first electrolytic paper.

[0009] As a further preferred embodiment of the present technical solution: the other end of the anode connecting column is connected to the anode aluminum foil, and the other end of the cathode connecting column is connected to the cathode aluminum foil.

[0010] As a further preferred embodiment of the technical solution, the convex ring abuts against the top of the rubber pad.

[0011] As a further preferred embodiment of the technical solution: an annular groove is provided on the outer side of the rubber pad, and a positioning groove is provided on the outer side of the aluminum shell located on the upper side of the first thermal insulation coating.

[0012] As a further preferred embodiment of the present technical solution: the positioning groove body matches the annular groove, and the positioning groove body abuts against the inside of the annular groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model can improve the sealing effect of the core package by wrapping the sealing sleeve on the outside of the core package, thereby reducing the influence of the external temperature on the capacitor; the reinforcement layer is arranged on the outside of the sealing sleeve, which can provide support for the core package and slow down the expansion of the core package; at the same time, a cavity is arranged inside the buffer layer, which can buffer the deformation of the core package and effectively reduce the deformation of the aluminum shell; by arranging the first thermal insulation coating and the second thermal insulation coating on the aluminum shell, the aluminum shell has a better thermal insulation effect and can be insulated from higher or lower temperatures to reduce the influence of temperature changes on the capacitor and ensure the stability of the capacitor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the PVC casing of the utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the aluminum shell of the utility model;

[0019] Figure 5 This is a schematic diagram of the core package structure of the utility model.

[0020] Explanation of the accompanying drawings: 1. PVC sleeve; 2. Aluminum shell; 3. Core package; 4. Anode connecting column; 5. Cathode connecting column; 6. Rubber pad; 7. Buffer layer; 8. Reinforcement layer; 9. Sealing sleeve; 10. First thermal insulation coating; 11. Second thermal insulation coating; 12. Anode aluminum foil; 13. First electrolytic paper; 14. Cathode aluminum foil; 15. Second electrolytic paper; 16. Protruding ring; 17. Cavity; 18. Annular groove; 19. Positioning groove body. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0023] Example

[0024] See also Figure 1-5 The utility model provides a technical solution: a multi-layer protective anti-expansion low-temperature resistant aluminum electrolytic capacitor, comprising an aluminum shell 2, the outer side of the aluminum shell 2 is wrapped with a PVC sleeve 1, the inside of the aluminum shell 2 is provided with a core package 3, and the inner side wall of the aluminum shell 2 is provided with a reinforcement component.

[0025] By setting up the reinforcing component, it is possible to provide support for the core package 3, reduce deformation of the aluminum shell 2, and insulate higher or lower temperatures to reduce the impact of temperature changes on the capacitor and ensure the stability of the capacitor structure; the reinforcing component includes a buffer layer 7, a reinforcing layer 8 and a sealing sleeve 9, the buffer layer 7 is fixedly connected to the inner wall of the aluminum shell 2, a cavity 17 is provided inside the buffer layer 7, the reinforcing layer 8 is fixedly connected to the outer side of the buffer layer 7, and the sealing sleeve 9 is fixedly sleeved on the outer side of the core package 3. By wrapping the sealing sleeve 9 on the outer side of the core package 3, the sealing effect of the core package 3 can be improved, thereby reducing the impact of the external temperature on the capacitor. The reinforcing layer 8 is arranged on the outside of the sealing sleeve 9, which can provide support for the core package 3 and slow down the expansion of the core package 3. At the same time, a cavity 17 is arranged inside the buffer layer 7, which can buffer the deformation of the core package 3 and effectively reduce the deformation of the aluminum shell 2; the outer side of the aluminum shell 2 is wrapped with a first thermal insulation coating 10, and the bottom of the aluminum shell 2 is provided with a second thermal insulation coating 11. The inside of the aluminum shell 2 is provided with a rubber pad 6 at the top of the core package 3, and a convex ring 16 is provided on the top of the aluminum shell 2. The convex ring 16 is in contact with the top of the rubber pad 6. By arranging the first thermal insulation coating 10 and the second thermal insulation coating 11 on the aluminum shell 2, the aluminum shell 2 has a better thermal insulation effect.

[0026] An anode connection column 4 and a cathode connection column 5 are provided on the core package 3, and the anode connection column 4 and the cathode connection column 5 respectively penetrate the bottom of the rubber pad 6. The core package 3 includes an anode aluminum foil 12, a first electrolytic paper 13, a cathode aluminum foil 14 and a second electrolytic paper 15. The first electrolytic paper 13 is attached to one side of the anode aluminum foil 12, the cathode aluminum foil 14 is attached to the side of the first electrolytic paper 13 away from the anode aluminum foil 12, and the second electrolytic paper 15 is attached to the side of the cathode aluminum foil 14 away from the first electrolytic paper 13. The other end of the anode connection column 4 is connected to the anode aluminum foil 12, and the other end of the cathode connection column 5 is connected to the cathode aluminum foil 14. The anode aluminum foil 12, the first electrolytic paper 13, the cathode aluminum foil 14 and the second electrolytic paper 15 are wound to form a columnar core package 3.

[0027] In order to ensure the sealing of the aluminum shell 2, an annular groove 18 is provided on the outside of the rubber pad 6, and a positioning groove body 19 is provided on the outside of the aluminum shell 2 on the upper side of the first thermal insulation coating 10. The positioning groove body 19 matches the annular groove 18, and the positioning groove body 19 is in contact with the inside of the annular groove 18. The position of the rubber pad 6 can be limited by the positioning groove body 19. At the same time, the positioning groove body 19 is squeezed inside the positioning groove body 19, which can improve the sealing of the aluminum shell 2.

[0028] Working principle or structural principle, by wrapping the sealing sleeve 9 on the outside of the core package 3, the convex ring 16 contacts the top of the rubber pad 6, which can improve the sealing effect of the core package 3, thereby reducing the influence of the external temperature on the capacitor and reducing the expansion of the capacitor. The reinforcing layer 8 is arranged on the outside of the sealing sleeve 9, which can provide support for the core package 3 and slow down the expansion of the core package 3. At the same time, a cavity 17 is arranged inside the buffer layer 7, which can buffer the deformation of the core package 3 and effectively reduce the deformation of the aluminum shell 2. The stability of the capacitor can be guaranteed by setting a multi-layer structure; by arranging a first thermal insulation coating 10 and a second thermal insulation coating 11 on the aluminum shell 2, the aluminum shell 2 has a better thermal insulation effect and can be isolated from higher or lower temperatures to reduce the influence of temperature changes on the capacitor and ensure the stability of the capacitor structure.

[0029] So far, the embodiments of the utility model have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each component are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0030] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0031] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-layered, anti-expansion, low-temperature-resistant aluminum electrolytic capacitor, comprising an aluminum shell (2), characterized in that: The outer side of the aluminum shell (2) is wrapped with a PVC sleeve (1), the interior of the aluminum shell (2) is provided with a core package (3), and the inner side wall of the aluminum shell (2) is provided with a reinforcement component; The reinforcement component comprises a buffer layer (7), a reinforcement layer (8) and a sealing sleeve (9); the buffer layer (7) is fixedly connected to the inner wall of the aluminum shell (2); a cavity (17) is arranged inside the buffer layer (7); the reinforcement layer (8) is fixedly connected to the outer side of the buffer layer (7); the sealing sleeve (9) is fixedly sleeved on the outer side of the core package (3); the outer side of the aluminum shell (2) is wrapped with a first thermal insulation coating (10); the bottom of the aluminum shell (2) is provided with a second thermal insulation coating (11); the inside of the aluminum shell (2) is provided with a rubber pad (6) at the top of the core package (3); and the top of the aluminum shell (2) is provided with a convex ring (16).

2. The multi-layered, anti-expansion, low-temperature-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The core package (3) is provided with an anode connection column (4) and a cathode connection column (5), and the anode connection column (4) and the cathode connection column (5) respectively penetrate the bottom of the rubber pad (6).

3. The multi-layered, anti-expansion, low-temperature-resistant aluminum electrolytic capacitor according to claim 2, characterized in that: The core package (3) comprises an anode aluminum foil (12), a first electrolytic paper (13), a cathode aluminum foil (14) and a second electrolytic paper (15), wherein the first electrolytic paper (13) is attached to one side of the anode aluminum foil (12), the cathode aluminum foil (14) is attached to a side of the first electrolytic paper (13) away from the anode aluminum foil (12), and the second electrolytic paper (15) is attached to a side of the cathode aluminum foil (14) away from the first electrolytic paper (13).

4. The multi-layered, anti-expansion, low-temperature-resistant aluminum electrolytic capacitor according to claim 3 is characterized in that: The other end of the anode connection column (4) is connected to the anode aluminum foil (12), and the other end of the cathode connection column (5) is connected to the cathode aluminum foil (14).

5. The multi-layered, anti-expansion, low-temperature-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The convex ring (16) contacts the top of the rubber pad (6).

6. The multi-layered, anti-expansion, low-temperature-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: An annular groove (18) is provided on the outer side of the rubber pad (6), and a positioning groove body (19) is provided on the outer side of the aluminum shell (2) located on the upper side of the first thermal insulation coating (10).

7. The multi-layered, anti-expansion, low-temperature-resistant aluminum electrolytic capacitor according to claim 6, characterized in that: The positioning groove body (19) matches the annular groove (18), and the positioning groove body (19) abuts against the inside of the annular groove (18).

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