Aluminum electrolytic capacitor with good sealing performance

Abstract

An aluminum electrolytic capacitor with good sealing performance includes a capacitor housing, a core package disposed inside the capacitor housing, a rubber stopper and a cover plate sequentially disposed above the core package, and a waisted groove machined on the capacitor housing. The waisted groove is engaged with the side of the rubber stopper. The rubber stopper includes a central column with a hollow area around the central column. The waisted groove is engaged at the center of the hollow area, causing the periphery of the rubber stopper to deform and make tight contact with the side wall of the capacitor housing, forming a sealed connection. Compared with the prior art, the aluminum electrolytic capacitor with good sealing performance of this utility model has a rubber stopper that is deformed by the waisted groove, forming a double seal between the rubber stopper and the capacitor housing, thus improving the sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of capacitor manufacturing, specifically to an aluminum electrolytic capacitor with good sealing performance. Background Technology

[0002] In existing aluminum electrolytic capacitors, the internal core is fixed by a waist groove. A rubber stopper is placed between the waist groove and the cover plate. The rubber stopper has a sealing function to prevent the electrolyte from evaporating. However, since the aluminum electrolytic capacitor shell itself is relatively thin, it is prone to deformation. Therefore, there will be a gap between the rubber stopper and the aluminum electrolytic capacitor shell, which will cause the electrolyte to evaporate. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an aluminum electrolytic capacitor with good sealing performance, which addresses the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An aluminum electrolytic capacitor with good sealing performance includes a capacitor housing, a core package disposed inside the capacitor housing, a rubber stopper and a cover plate disposed sequentially above the core package, a waist groove machined on the capacitor housing, the waist groove being engaged with the side of the rubber stopper, the rubber stopper including a central column, a hollow area disposed around the central column, the waist groove being engaged with the central position of the hollow area, causing the periphery of the rubber stopper to deform and make tight contact with the side wall of the capacitor housing, forming a sealed connection.

[0005] Furthermore, the surface of the intermediate column of the rubber stopper is provided with multiple connectors with a "T" shaped cross-section, and the cover plate is machined with stepped holes, and the connectors are connected to the stepped holes.

[0006] Furthermore, the capacitor housing has an inwardly facing flange at the opening, which presses against the cover plate.

[0007] Furthermore, the core package is connected to a positive lead and a negative lead, which pass through a rubber stopper and a cover plate.

[0008] Compared with the prior art, the aluminum electrolytic capacitor of this utility model has good sealing performance. The rubber plug is deformed by the waist groove around its perimeter, so that the rubber plug and the capacitor shell form two seals, thereby improving the sealing performance. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the rubber stopper of this utility model; Among them, 1. capacitor shell, 2. core package, 3. rubber stopper, 4. cover plate, 5. positive lead, 6. negative lead, 7. waist groove, 8. flange, 311. intermediate column, 312. connector, 313. hollow area. Detailed Implementation

[0010] The technical solutions in the embodiments of this utility model will be clearly and completely described below.

[0011] like Figure 1 and Figure 2 As shown, an aluminum electrolytic capacitor with good sealing performance includes a capacitor housing 1, a core package 2 disposed inside the capacitor housing 1, a rubber stopper 3 and a cover plate 4 disposed sequentially above the core package 2, a positive lead 5 and a negative lead 6 connected to the core package 2, the positive lead 5 and the negative lead 6 passing through the rubber stopper 3 and the cover plate 4, and a waist groove 7 machined on the capacitor housing 1, the waist groove 7 being engaged with the side of the rubber stopper 3, causing the side of the rubber stopper 3 to deform and make tight contact with the capacitor housing 1 to form a seal.

[0012] In this embodiment, the rubber stopper 3 includes a central column 311, and the surface of the central column 311 is provided with a plurality of connectors 312 with a cross-section of "T". The cover plate 4 is disposed on the rubber stopper 3. The opening of the capacitor housing 1 is processed with an inwardly facing flange 8, which presses the cover plate 4 tightly. The cover plate 4 is processed with a stepped hole, and the connectors 312 are connected to the stepped hole and are locked in the stepped hole. The central column 311 is provided with a hollow area 313 around its periphery. The waist groove 7 is locked in the middle position of the hollow area 313, causing the periphery of the rubber stopper 3 to deform and make tight contact with the side wall of the capacitor housing 1, forming a sealed connection.

[0013] In this embodiment, since the waist groove 7 is located in the middle of the hollow area 313 of the rubber stopper, and the upper and lower sides of the hollow area 313 are blocked by the core package 2 and the cover plate 4 respectively, after the middle of the hollow area 313 is squeezed, the air inside causes the outer ring of the rubber stopper 3 to expand towards both sides of the waist groove 7, forming two seals on both sides of the waist groove 7.

[0014] This utility model is not limited to the embodiments described. Those skilled in the art can still make some modifications or changes without departing from the spirit and scope of this utility model. Therefore, the scope of protection of this utility model shall be determined by the scope defined in the claims.

Claims

1. An aluminum electrolytic capacitor with good sealing performance, comprising a capacitor housing, a core package disposed inside the capacitor housing, a rubber stopper and a cover plate sequentially disposed above the core package, wherein a waist groove is machined on the capacitor housing, the waist groove being engaged with the side of the rubber stopper, characterized in that: The rubber stopper includes a central column with a hollow area around it. The waist groove is positioned in the middle of the hollow area, causing the periphery of the rubber stopper to deform and come into close contact with the side wall of the capacitor housing, thus forming a sealed connection.

2. The aluminum electrolytic capacitor with good sealing performance according to claim 1, characterized in that: The surface of the middle column of the rubber stopper is provided with multiple connectors with a "T" shaped cross section, and the cover plate is machined with stepped holes, and the connectors are connected to the stepped holes.

3. An aluminum electrolytic capacitor with good sealing performance according to claim 1, characterized in that: The capacitor housing has an inwardly facing flange at the opening, which presses against the cover plate.

4. The aluminum electrolytic capacitor with good sealing performance according to claim 1, characterized in that: The core package is connected to a positive lead and a negative lead, which pass through a rubber stopper and a cover plate.

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