Aluminum electrolytic capacitor with vibration resistance

Abstract

The utility model discloses an aluminum electrolytic capacitor with vibration resistance, which comprises a core bag, a first adhesive tape layer and a second adhesive tape layer are sequentially arranged on the outer wall surface of the core bag, the first adhesive tape layer has a first maximum heat-resistant temperature, and the second adhesive tape layer has a second maximum heat-resistant temperature. The first maximum heat-resistant temperature is greater than the second maximum heat-resistant temperature, so that when the core package is heated and aged at a heating temperature greater than the second maximum heat-resistant temperature and less than the first maximum heat-resistant temperature, the first adhesive tape layer does not deform, and at least part of the second adhesive tape layer shrinks and forms a bulge. According to the aluminum electrolytic capacitor, the second adhesive tape layer deforms and is gradually condensed to form the protruding structure, so that contact fixation can be formed through the protrusions and the external aluminum shell, and the anti-vibration performance of the aluminum electrolytic capacitor is improved.

Description

Technical Field

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

[0002] As electronic components, electrolytic capacitors are often used in related electronic instruments / equipment with severe vibrations such as power tools / air compressors / automobiles. However, due to the inherent characteristics of aluminum electrolytic capacitors: the core package and the aluminum shell cannot be completely fitted, contacted and fixed, the lead wire reinforcement ribs where the core package inside the capacitor contacts the rubber plug will break and fail. Utility Model Content

[0003] The main purpose of the utility model is to provide an aluminum electrolytic capacitor with vibration resistance, aiming to solve the above technical problems.

[0004] To achieve the above-mentioned purpose, the utility model proposes a vibration-resistant aluminum electrolytic capacitor including a core package, wherein a first tape layer and a second tape layer are sequentially arranged on the outer wall surface of the core package, wherein the first tape layer has a first maximum heat-resistant temperature, and the second tape layer has a second maximum heat-resistant temperature, and the first maximum heat-resistant temperature is greater than the second maximum heat-resistant temperature, so that when the core package is subjected to heat aging at a heating temperature greater than the second maximum heat-resistant temperature and less than the first maximum heat-resistant temperature, the first tape layer does not deform, and at least a portion of the second tape layer shrinks and forms a protrusion.

[0005] In one embodiment, the second tape layer includes a first shrinkage portion, a condensation portion and a second shrinkage portion which are sequentially connected from top to bottom. In the heating temperature environment, at least part of the first shrinkage portion and the second shrinkage portion can shrink toward the condensation portion and form the protrusion at the condensation portion.

[0006] In one embodiment, in the heating temperature environment, the first shrinkage portion and the second shrinkage portion may be completely condensed to the condensation portion and form the protrusion at the condensation portion.

[0007] In one embodiment, the protrusion protrudes radially outward from the first tape layer.

[0008] In one embodiment, the protrusion is ring-shaped.

[0009] In one embodiment, the first tape layer is made of polypropylene.

[0010] In one embodiment, the first maximum heat resistance temperature is greater than or equal to 130°C.

[0011] In one embodiment, the material of the second tape layer is nitrile silicone rubber.

[0012] In one embodiment, the second maximum heat resistance temperature is greater than or equal to 80°C.

[0013] In one embodiment, the range of the heating temperature T is: 95°C ≤ T ≤ 105°C.

[0014] In the technical solution of the utility model, the vibration-resistant aluminum electrolytic capacitor includes a core package, and a first tape layer and a second tape layer are sequentially arranged on the outer wall surface of the core package, the first tape layer has a first maximum heat-resistant temperature, the second tape layer has a second maximum heat-resistant temperature, and the first maximum heat-resistant temperature is greater than the second maximum heat-resistant temperature, so that when the core package is heated and aged at a heating temperature greater than the second maximum heat-resistant temperature and less than the first maximum heat-resistant temperature, the first tape layer does not deform, and at least part of the second tape layer shrinks and forms a protrusion. Therefore, in the technical solution, when the core package is heated and aged at a heating temperature greater than the second maximum heat-resistant temperature and less than the first maximum heat-resistant temperature, the second tape layer will deform and gradually condense into a protrusion structure, so that it can be contacted and fixed with the external aluminum shell through the protrusion to improve the vibration resistance of the aluminum electrolytic capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic structural diagram of a vibration-resistant aluminum electrolytic capacitor according to an embodiment of the utility model;

[0017] Figure 2 It is a schematic structural diagram of another state of the vibration-resistant aluminum electrolytic capacitor according to an embodiment of the utility model.

[0018] Description of the accompanying drawings: 10, core package; 20, first tape layer; 30, second tape layer; 40, protrusion.

[0019] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] 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 of 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.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] Furthermore, the technical solutions of the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] The utility model provides an aluminum electrolytic capacitor with vibration resistance.

[0025] like Figure 1-2 As shown, the vibration-resistant aluminum electrolytic capacitor provided by the embodiment of the utility model includes a core package 10, and a first tape layer 20 and a second tape layer 30 are sequentially arranged on the outer wall surface of the core package 10, the first tape layer 20 has a first maximum heat resistance temperature, the second tape layer 30 has a second maximum heat resistance temperature, and the first maximum heat resistance temperature is greater than the second maximum heat resistance temperature, so that when the core package 10 is heated and aged at a heating temperature greater than the second maximum heat resistance temperature and less than the first maximum heat resistance temperature, the first tape layer 20 does not deform, and at least a portion of the second tape layer 30 shrinks and forms a protrusion 40.

[0026] In the present application, when producing an aluminum electrolytic capacitor, firstly, the anode foil, cathode foil, and electrolytic paper are cut into a specified width, and then the positive guide pin is riveted on the anode aluminum foil, the negative guide pin is riveted on the cathode aluminum foil, and the electrolytic paper is sandwiched between the anode foil and the cathode foil and wound together to form a core package 10, and then the first tape layer 20 and the second tape layer 30 (such as Figure 1 As shown), the first tape layer 20 and the second tape layer 30 are then subjected to heat aging.

[0027] There is a temperature difference between the maximum heat-resistant temperatures of the first tape layer 20 and the second tape layer 30. Therefore, when heat aging is performed at a heating temperature greater than the second maximum heat-resistant temperature and less than the first maximum heat-resistant temperature, since the heating temperature does not reach the maximum heat-resistant temperature of the first tape layer 20, the first tape layer 20 can withstand the heating temperature and remain unchanged. However, the heating temperature exceeds the maximum heat-resistant temperature of the second tape layer 30, so the second tape layer 30 cannot maintain its original state and will deform and shrink under the action of the heating temperature to form a protrusion 40 (such as Figure 2 As shown), the protrusion 40 can form contact and fix with the aluminum shell, thereby improving the vibration resistance of the product.

[0028] In the present application, the protrusion 40 for improving the anti-vibration performance can be formed on the outside of the aluminum electrolytic capacitor only by heating, which obviously has the beneficial effects of convenient processing and stable anti-vibration performance.

[0029] When the second adhesive tape layer 30 is deformed and stops vomiting, the core package 10 is placed in the dipping tank for dipping, so that the holes of the electrolytic paper and aluminum foil of the core package 10 are fully absorbed by the electrolyte;

[0030] Then, the core package 10 impregnated with electrolyte is assembled with a rubber plug, and a silicone ring is assembled outside the core package 10 to seal with the aluminum shell to prevent the electrolyte from volatilizing;

[0031] Finally, put a layer of casing on the outside of the aluminum shell of the aluminum electrolytic capacitor.

[0032] Aluminum electrolytic capacitors can be aged, damaged oxide films repaired, and their three major characteristics (CAP, DF, LC) tested.

[0033] In the above embodiment, the second adhesive tape layer 30 includes a first shrinking portion, a condensation portion, and a second shrinking portion that are sequentially connected from top to bottom. In the heating temperature environment, at least part of the first shrinking portion and the second shrinking portion can shrink toward the condensation portion and form the protrusion 40 at the condensation portion. That is, when the second adhesive tape layer 30 is installed outside the first adhesive tape layer 20 and is in a heating temperature environment, the first shrinking portion and the second shrinking portion located on the upper and lower sides of the condensation portion will both expand and contract toward the condensation portion located in the middle part, and then protrude radially outward at the condensation portion to form the protrusion 40.

[0034] In an optional embodiment, in the heating temperature environment, the first contraction part and the second contraction part can be completely condensed to the condensation part and form the protrusion 40 at the condensation part. That is to say, the protrusion is annular as a whole. In other embodiments, the protrusion 40 can also be discontinuous.

[0035] In a preferred embodiment, the material of the first tape layer 20 is polypropylene, and the first maximum heat-resistant temperature is greater than or equal to 130° C. The material of the second tape layer 30 is nitrile silicone rubber, and the second maximum heat-resistant temperature is greater than or equal to 80° C. The range of the heating temperature T is: 95° C. ≤ T ≤ 105° C.

[0036] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An aluminum electrolytic capacitor having vibration resistance, characterized in that: The vibration-resistant aluminum electrolytic capacitor comprises a core package (10), wherein a first tape layer (20) and a second tape layer (30) are sequentially arranged on the outer wall surface of the core package (10), wherein the first tape layer (20) has a first maximum heat resistance temperature, and the second tape layer (30) has a second maximum heat resistance temperature, and the first maximum heat resistance temperature is greater than the second maximum heat resistance temperature, so that when the core package (10) is subjected to heat aging at a heating temperature greater than the second maximum heat resistance temperature and less than the first maximum heat resistance temperature, the first tape layer (20) does not deform, and at least a portion of the second tape layer (30) shrinks and forms a protrusion (40).

2. The vibration-resistant aluminum electrolytic capacitor according to claim 1, wherein: The second adhesive tape layer (30) comprises a first shrinkage portion, a condensation portion and a second shrinkage portion which are sequentially connected from top to bottom, and when the core package is heated and aged, at least part of the first shrinkage portion and the second shrinkage portion can shrink in the direction of the condensation portion and form the protrusion (40) at the condensation portion.

3. The vibration-resistant aluminum electrolytic capacitor according to claim 2, wherein: When the core package is heated and aged, the first shrinkage portion and the second shrinkage portion can be completely condensed to the condensation portion and the protrusion (40) can be formed at the condensation portion.

4. The vibration-resistant aluminum electrolytic capacitor according to claim 2, wherein: The protrusion (40) protrudes radially outward from the first adhesive tape layer (20).

5. The vibration-resistant aluminum electrolytic capacitor according to claim 4, wherein: The protrusion (40) is ring-shaped.

6. The vibration-resistant aluminum electrolytic capacitor according to claim 1, wherein: The material of the first tape layer (20) is polypropylene.

7. The vibration-resistant aluminum electrolytic capacitor according to claim 6, wherein: The first maximum heat-resistant temperature is greater than or equal to 130°C.

8. The vibration-resistant aluminum electrolytic capacitor according to claim 1, wherein: The material of the second adhesive tape layer (30) is nitrile silicone rubber.

9. The vibration-resistant aluminum electrolytic capacitor according to claim 8, wherein: The second maximum heat-resistant temperature is greater than or equal to 80°C.

10. The vibration-resistant aluminum electrolytic capacitor according to claim 1, wherein: The range of the heating temperature T is: 95°C≤T≤105°C.

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