Aluminum electrolytic capacitor

Abstract

An aluminum electrolytic capacitor comprises a shell, a core package and a cover plate, and the core package is arranged in the shell in a sealed mode through the cover plate. The cover plate comprises a base body and a sealing piece made of rubber, the sealing piece is arranged on the edge of the base body, and the combination portion of the shell and the sealing piece is sealed through a sealing girdling. According to the utility model, the sealing performance of the product is improved through the girdling between the shell and the sealing element, so that the reliability of the product in liquid cooling and high-salt environments is ensured.

Description

Technical Field

[0001] The utility model relates to an aluminum electrolytic capacitor, in particular to a double-waisted aluminum electrolytic capacitor. Background Art

[0002] The cover of the traditional bolt aluminum electrolytic capacitor or the horn aluminum electrolytic capacitor is as follows Figure 1 As shown, the common cover plate generally includes a base layer 6 and a rubber layer 7, and the rubber layer 6 is mainly used for sealing with the lead terminal 8. Since the fixation of the lead terminal 8 to the base layer and the rubber layer 7 relies on the seal formed by the fixed extrusion of the rubber layer when the lead terminal 8 is assembled, the sealing strength is limited. However, in a halogen environment, the rubber layer is prone to aging, and the sealing gap between the rubber layer and the lead terminal 8 makes it easy for halogen to enter the internal core lead bar, and when the power is turned on, the halogen accumulates and the corrosion reaction occurs, causing the lead bar to break and open the circuit. As a result, the sealing performance between the lead terminal and the rubber layer is reduced, which affects the reliability of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an aluminum electrolytic capacitor with double waists.

[0004] In order to solve the above technical problems, the technical solution proposed by the utility model is: an aluminum electrolytic capacitor, including a shell, a core package and a cover plate, wherein the cover plate seals the core package in the shell; the cover plate includes a base and a seal made of rubber, wherein the seal is arranged at the edge of the base, and the joint between the shell and the seal is sealed by a sealing waist.

[0005] In the above aluminum electrolytic capacitor, preferably, a side edge of the substrate is provided with a receiving groove for arranging a seal, the seal is arranged in the receiving groove and the seal is sealed with the cover plate.

[0006] The above-mentioned aluminum electrolytic capacitor is preferably provided with a load-bearing waist on the shell, and the substrate is arranged on the load-bearing waist; the opening end of the shell extends out of the substrate, and the part of the shell extending out of the substrate is curled; the top of the substrate is sealed between the curled part of the shell and the substrate by a sealant.

[0007] Preferably, in the above aluminum electrolytic capacitor, a gap is formed between the curled edge of the shell and the base, and the gap is filled with sealant.

[0008] In the above aluminum electrolytic capacitor, preferably, the sealing member is arranged on the upper edge of the substrate, and the sealing member is sealed and connected to the substrate; and a groove connected to the sealing member is arranged on the substrate.

[0009] For the aluminum electrolytic capacitor, preferably, the shell is provided with a load-bearing waist, and the substrate is provided on the load-bearing waist; the opening end of the shell extends out of the substrate, and the portion of the shell extending out of the substrate is curled and embedded in the sealing member.

[0010] Compared with the prior art, the utility model has the advantages that: in the utility model, the sealing of the product is increased by the waist between the shell and the seal, thereby ensuring the reliability of the product in liquid cooling and high-salt environments. At the same time, the upper sealing curling edge is bent to buckle the cured sealant layer. The adhesion between the sealant layer and the cover plate in a vibration environment is ensured, the gap is reduced and thus the halogen is intruded, and the service life of the aluminum electrolytic capacitor in a halogen environment is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a traditional aluminum electrolytic capacitor cover plate in the background technology.

[0012] Figure 2 Schematic diagram of the structure of the aluminum electrolytic capacitor in Example 1.

[0013] Figure 3 This is a schematic diagram of the structure of the cover plate in Example 1.

[0014] Figure 4 Schematic diagram of the structure of the aluminum electrolytic capacitor in Example 2.

[0015] Figure 5 Schematic diagram of the structure of the cover plate in Example 2.

[0016] Figure 6 This is a schematic structural diagram of the aluminum electrolytic capacitor after a sealing adhesive layer is formed on the substrate in Example 2.

[0017] Legend

[0018] 1. Shell; 2. Cover plate; 21. Base; 22. Seal; 3. Sealing waist; 4. Load-bearing waist; 5. Sealant; 6. Base layer; 7. Rubber layer; 8. Lead terminal; 9. Curling. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and carefully below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0020] It should be noted that when an element is described as being "fixed, fixed, connected or connected to" another element, it can be directly fixed, fixed, connected or connected to the other element, or it can be indirectly fixed, fixed, connected or connected to the other element through other intermediate connectors.

[0021] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present utility model. Example 1

[0022] like Figure 2 An aluminum electrolytic capacitor shown in the figure comprises a shell 1, a core package and a cover plate 2, wherein the cover plate 2 seals the core package in the shell 1; the cover plate 2 comprises a base 21 and a seal 22 made of rubber, wherein the seal 22 is arranged at the edge of the base 21, and the joint between the shell 1 and the seal 22 is sealed by a sealing waist 3.

[0023] like Figure 3 As shown, in this embodiment, a receiving groove for setting a seal 22 is provided on the side edge of the base 21, and the seal 22 is arranged inside and sealed between the seal 22 and the cover plate 2. In this embodiment, the seal 22 is arranged in the receiving groove, and the seal 22 and the base 21 can be connected by extrusion sealing or by glue sealing.

[0024] like Figure 2 As shown, in this embodiment, a bearing waist 4 is arranged on the shell 1, and the base 21 is arranged on the bearing waist 4, and the bearing waist 4 holds up the base 21; plus the sealing waist 3 at the joint of the shell 1 and the sealing member 22, the aluminum electrolytic capacitor of this embodiment has a double waist. The opening end of the shell 1 extends out of the base 21, and the part of the shell 1 extending out of the base 21 is curled; the top of the base 21 is sealed between the curled part of the shell 1 and the base 21 through the sealant 5. In this embodiment, since the material of the base 21 is made of bakelite resin sheet or ABS, phenolic resin, etc., after the shell 1 is curled, no sealing structure is formed between the shell 1 and the base 21. After the curling is completed, the sealant 5 is added to the base 21. Due to the fluidity of the sealant 5 before curing, the sealant 5 will penetrate into the space of the curling 9 of the shell 1 before curing, thereby ensuring the sealing performance between the shell 1 and the base 21 after the sealant 5 is cured.

[0025] In this embodiment, after the shell 1 is curled, a gap can be formed between the curled edge 9 and the base 21, so that after the sealant 5 is added to the base 21, the sealant 5 can be more easily filled into the space of the curled edge 9, thereby ensuring the seal between the shell 1 and the base 21 after the sealant 5 is cured.

[0026] In this embodiment, after the curling is completed, adding a sealant 5 on the base 21 can also increase the sealing between the lead terminal 8 and the base 21. In this embodiment, the lead terminal 8 includes an anode terminal and a cathode terminal; since no rubber layer is provided in this embodiment, the anode terminal and the cathode terminal cannot be sealed by extruding the rubber layer. In this embodiment, the anode terminal and the cathode terminal need to be sealed with the base 21 by glue.

[0027] In the utility model, the sealing of the product is increased by the waist between the housing 1 and the seal 22, thereby ensuring the reliability of the product in liquid cooling and high-salt environments. At the same time, the upper sealing curling edge is bent to buckle the cured sealant layer. The adhesion between the sealant layer and the cover plate is ensured under a vibration environment, the gap is reduced and thus the halogen intrusion is reduced, and the service life of the aluminum electrolytic capacitor in a halogen environment is extended. Example 2

[0028] like Figure 4 and Figure 5 As shown, in this example, the seal 22 is arranged on the upper edge of the base 21, and the seal 22 is sealed and connected to the base 21; the base 21 is provided with a groove connected to the seal 22. The housing 1 is provided with a load-bearing waist 4, and the base 21 is arranged on the load-bearing waist 4; the opening end of the housing 1 extends out of the base 21, and the partial curling edge 9 of the housing 1 extending out of the base 21 is embedded in the seal 22.

[0029] In this embodiment, it is also possible to Figure 6 As shown, after the curling is completed, a sealant 5 is added on the substrate 21 and cured to form a sealant 5 layer. The sealant 5 can increase the sealing between the lead terminal 8 and the substrate 21 .

[0030] The other parts of this embodiment are the same as those of Embodiment 1.

Claims

1. An aluminum electrolytic capacitor, characterized in that: It includes an outer shell, a core package and a cover plate, wherein the cover plate seals the core package in the outer shell; the cover plate includes a base body and a seal made of rubber, wherein the seal is arranged at the edge of the base body, and the joint between the outer shell and the seal is sealed by a sealing waist.

2. The aluminum electrolytic capacitor according to claim 1, characterized in that: The side edge of the base body is provided with a receiving groove for arranging a sealing member, the sealing member is arranged in the receiving groove and the sealing member and the cover plate are sealed.

3. The aluminum electrolytic capacitor according to claim 2, characterized in that: The shell is provided with a load-bearing waist, and the base is provided on the load-bearing waist; the opening end of the shell extends out of the base, and the part of the shell extending out of the base is curled; the top of the base is sealed between the curled part of the shell and the base by using sealant.

4. The aluminum electrolytic capacitor according to claim 3, characterized in that: A gap is formed between the curling edge of the shell and the base body, and the gap is filled with sealant.

5. The aluminum electrolytic capacitor according to claim 1, characterized in that: The sealing member is arranged on the upper side edge of the base body, and the sealing member and the base body are sealed and connected; the base body is provided with a groove connected with the sealing member.

6. The aluminum electrolytic capacitor according to claim 5, characterized in that: The shell is provided with a load-bearing waist, and the base is provided on the load-bearing waist; the opening end of the shell extends out of the base, and the part of the shell extending out of the base is curled and embedded in the sealing component.

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