A large aluminum electrolytic capacitor
By using a rubber layer of a sealing element to form an extrusion section with a resin plate layer in a large aluminum electrolytic capacitor, an extrusion-sealed connection between the anode and cathode leads is achieved, solving the problems of high cost and complex process of lead terminals, reducing production costs and simplifying the process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN AIHUA HOLDINGS CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-21
Smart Images
Figure CN224536877U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic components, and in particular to a large aluminum electrolytic capacitor. Background Technology
[0002] Currently, large aluminum electrolytic capacitors, such as horn-shaped and bolt-shaped aluminum electrolytic capacitors, are sealed between a cover plate and the aluminum shell. Their leads, such as horn-shaped and bolt-shaped terminals, are pre-installed on the cover plate. Using a cover plate to seal the aluminum shell in large aluminum electrolytic capacitors avoids the bulging and other aesthetic defects that can occur with traditional rubber plugs due to their excessive size. However, the cost of traditional large capacitor leads, such as horn-shaped and bolt-shaped terminals, is relatively high, and the manufacturing process is complex. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a large aluminum electrolytic capacitor of CP line type.
[0004] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows: a large aluminum electrolytic capacitor, comprising an aluminum shell, a sealing element, and a core package, wherein the core package is sealed inside the aluminum shell by the sealing element; the core package comprises an anode foil, a cathode foil, and electrolytic paper, wherein an anode guide pin and a cathode guide pin are riveted to the anode foil and the cathode foil, respectively; the sealing element comprises a resin plate layer and a rubber layer, wherein the resin plate layer is provided with a receiving hole, and the rubber layer is disposed on the upper or lower surface of the resin plate layer and extends into the receiving hole to form a pressing part, wherein a pressing hole is formed on the pressing part; the aluminum stem of the anode guide pin and / or the cathode guide pin is pressed into the pressing part.
[0005] In the aforementioned large aluminum electrolytic capacitor, preferably, the rubber layer is disposed on the upper surface of the resin plate layer; the open end of the aluminum shell is pressed into the rubber layer by a rolled edge to achieve a sealed connection.
[0006] In the aforementioned large aluminum electrolytic capacitor, preferably, the rubber layer extends through a receiving hole to the lower surface of the resin plate layer to form a fixing part.
[0007] Preferably, in the aforementioned large aluminum electrolytic capacitor, the fixing part covers the lower surface of the resin plate layer.
[0008] In the aforementioned large aluminum electrolytic capacitor, preferably, the rubber layer extends from the side of the resin plate layer to the lower surface of the resin plate layer.
[0009] In the aforementioned large aluminum electrolytic capacitor, preferably, the rubber layer is disposed on the lower surface of the resin plate layer; the rubber layer extends from the side of the resin plate layer to the upper surface of the resin plate layer to form a sealing portion; the open end of the aluminum shell is pressed into the sealing portion by the rolled edge to achieve a sealed connection.
[0010] In the aforementioned large aluminum electrolytic capacitor, preferably, the rubber layer extends through a receiving hole to the upper surface of the resin plate layer to form a fixing part.
[0011] Preferably, in the above-mentioned large aluminum electrolytic capacitor, the extrusion holes of the extrusion section include aluminum stem extrusion holes and CP wire extrusion holes, with the CP wire extrusion holes located above the aluminum stem extrusion holes.
[0012] Compared with the prior art, the advantages of this utility model are as follows: In this utility model, the rubber layer of the sealing element extends into the receiving hole of the resin plate layer, thereby forming an extrusion section; the aluminum stems of the anode and cathode guide pins on the core package are respectively extruded into the extrusion section for sealing connection; since the anode and cathode guide pins are led out, costs can be saved. Furthermore, in this utility model, since the anode and cathode guide pins are sealed with the extrusion section using an extrusion seal connection, the manufacturing process is simple. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of the large aluminum electrolytic capacitor in Example 1.
[0014] Figure 2 This is a schematic diagram of the assembly structure of the large aluminum electrolytic capacitor in Example 1.
[0015] Figure 3 This is a cross-sectional view of the seal in Example 1.
[0016] Figure 4 This is a schematic diagram of the structure in Example 1, showing the rubber layer extending from the side of the resin board layer to the lower surface of the resin board layer.
[0017] Figure 5 This is a cross-sectional view of the seal in Example 2.
[0018] Figure 6 This is a cross-sectional view of the seal in Example 3.
[0019] Figure 7 This is a schematic diagram of the seal in Example 4.
[0020] Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure along the middle AA.
[0021] Figure 9 This is a cross-sectional view of the seal in Example 5.
[0022] Legend
[0023] 1. Aluminum shell; 2. Seal; 21. Resin plate layer; 22. Rubber layer; 221. Extrusion section; 2211. Aluminum stem extrusion hole; 2212. CP wire extrusion hole; 23. Fixing section; 24. Sealing section; 3. Core package; 4. Waist; 5. Anode guide; 6. Cathode guide needle; 7. Aluminum stem; 8. CP wire; 9. Explosion-proof valve. Detailed Implementation
[0024] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.
[0025] It should be noted that when a component is described as being "fixed to, attached to, connected to, or connected to" another component, it can mean that it is directly fixed to, attached to, connected to, or connected to the other component, or it can mean that it is connected to the other component through other intermediate connections.
[0026] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention. Example 1
[0027] like Figure 1 and Figure 2 The large aluminum electrolytic capacitor shown includes an aluminum shell 1, a sealing element 2, and a core package 3. A waist 4 is provided on the aluminum shell 1, and the sealing element 2 is disposed on the waist 4. The core package 3 is sealed inside the aluminum shell 1 by the sealing element 2. An explosion-proof valve is provided at the bottom of the aluminum shell. The core package 3 is formed by winding an anode foil, a cathode foil, and electrolytic paper. An anode guide pin 5 and a cathode guide pin 6 are riveted to the anode foil and cathode foil, respectively. The sealing element 2 includes a resin plate layer 21 and a rubber layer 22. A receiving hole is provided on the resin plate layer 21. The rubber layer 22 is disposed on the upper or lower surface of the resin plate layer 21 and extends into the receiving hole to form a compression section 221. A compression hole is formed on the compression section 221. The aluminum stems of the anode guide pin 5 and the cathode guide pin 6 are compressed into the compression section 221.
[0028] In this embodiment, the rubber layer 22 extends into the receiving hole of the resin plate layer 21, so that the rubber layer 22 has sufficient width to compress the anode guide pin 5 and the cathode guide pin 6; to further increase the width of the rubber layer 22 in compressing the anode guide pin 5 and the cathode guide pin 6, the compression portion 221 of the rubber layer 22 can extend out of the resin plate layer 21. When the width of the compression portion 221 is sufficiently wide, it can be as follows: Figure 3As shown, in this embodiment, the extrusion holes of the extrusion section 221 include an aluminum stem extrusion hole 2211 and a CP wire extrusion hole 2212, with the CP wire extrusion hole 2212 positioned above the aluminum stem extrusion hole 2211. In this embodiment, the extrusion of the aluminum stem and CP wire by the extrusion section 221 causes the anode guide needle 5 and the cathode guide needle 6 to be sealed and connected to the rubber layer 22.
[0029] In this embodiment, the resin board layer 21 is made of phenolic resin; the rubber layer 22 is disposed on the upper surface of the resin board layer 21; the open end of the aluminum shell 1 is pressed into the rubber layer 22 by rolling the edge to form a sealed connection.
[0030] In this embodiment, the rubber layer 22 of the sealing element 2 extends into the receiving hole of the resin plate layer 21, thereby forming the extrusion section 221; the aluminum stem portions of the anode guide pin 5 and the cathode guide pin 6 on the core package 3 are respectively extruded into the extrusion section 221 to form a sealed connection; since the anode guide pin 5 and the cathode guide pin 6 are led out, costs can be saved. At the same time, in this utility model, since the anode guide pin 5 and the cathode guide pin 6 are connected to the extrusion section 221 by extrusion sealing, the manufacturing process is simple.
[0031] In this embodiment, as Figure 4 As shown, the rubber layer 22 can extend from the side of the resin plate layer 21 to the lower surface of the resin plate layer 21; in this way, when the aluminum shell is waisted and rolled, the aluminum shell can squeeze the rubber layer on the side of the resin plate layer to further enhance the sealing effect. Example 2
[0032] like Figure 5 As shown, the rubber layer 22 extends through the receiving hole to the lower surface of the resin board layer 21 to form a fixing part 23. The fixing part 23 enables the rubber layer 22 to be more firmly attached to the resin board layer 21. The other parts of this embodiment are the same as those in Embodiment 1. Example 3
[0033] like Figure 6 As shown, the fixing part 23 completely covers the lower surface of the resin board layer 21; thus, the rubber layer 22 protects the resin board layer 21 from both the top and bottom. The other parts of this embodiment are the same as those in Embodiment 2. Example 4
[0034] like Figure 7 and Figure 8As shown, a rubber layer 22 is disposed on the lower surface of the resin plate layer 21; the rubber layer 22 extends from the side of the resin plate layer 21 to the upper surface of the resin plate layer 21 to form a sealing portion; the open end of the aluminum shell 1 is pressed into the sealing portion by a rolled edge to achieve a sealed connection. Since a sealed connection is required between the aluminum shell 1 and the sealing element 2, in this embodiment, the rubber layer 22 extends from the side of the resin plate layer 21 to the upper surface of the resin plate layer 21 to form a sealing portion, so that the open end of the aluminum shell 1 can be pressed into the sealing portion by a rolled edge to achieve a sealed connection with the sealing element 2. The other parts of this embodiment are the same as those in embodiment 1. Example 5
[0035] In this embodiment, as Figure 9 The rubber layer 22 shown extends through the receiving hole to the upper surface of the resin plate layer 21 to form a fixing part 23. The other parts of this embodiment are the same as those in embodiment 4.
Claims
1. A large aluminum electrolytic capacitor, comprising an aluminum shell, a sealing element, and a core package, wherein the core package is sealed within the aluminum shell by the sealing element; the core package comprises an anode foil, a cathode foil, and electrolytic paper, wherein an anode guide pin and a cathode guide pin are respectively riveted to the anode foil and the cathode foil; characterized in that: The sealing element includes a resin plate layer and a rubber layer. The resin plate layer is provided with a receiving hole. The rubber layer is disposed on the upper or lower surface of the resin plate layer and extends into the receiving hole to form a pressing part. The pressing part is provided with a pressing hole. The aluminum stem of the anode guide needle and / or cathode guide needle is pressed into the pressing part.
2. The large aluminum electrolytic capacitor according to claim 1, characterized in that: The rubber layer is disposed on the upper surface of the resin plate layer; the open end of the aluminum shell is pressed into the rubber layer by the rolled edge to form a sealed connection.
3. The large aluminum electrolytic capacitor according to claim 1 or 2, characterized in that: The rubber layer extends through the receiving hole to the lower surface of the resin board layer to form a fixing part.
4. The large aluminum electrolytic capacitor according to claim 3, characterized in that: The fixing part covers the lower surface of the resin board layer.
5. The large aluminum electrolytic capacitor according to claim 1, characterized in that: The rubber layer extends from the side of the resin board layer to the lower surface of the resin board layer.
6. The large aluminum electrolytic capacitor according to claim 1, characterized in that: The rubber layer is disposed on the lower surface of the resin board layer; the rubber layer extends from the side of the resin board layer to the upper surface of the resin board layer to form a sealing part; the open end of the aluminum shell is pressed into the sealing part by the rolled edge to form a sealed connection.
7. The large aluminum electrolytic capacitor according to claim 1, characterized in that: The rubber layer extends through the receiving hole to the upper surface of the resin plate layer to form a fixing part.
8. The large aluminum electrolytic capacitor according to claim 1, characterized in that: The extrusion orifice of the extrusion section includes an aluminum stem extrusion orifice and a CP line extrusion orifice, with the CP line extrusion orifice located above the aluminum stem extrusion orifice.