Vibration-resistant aluminum electrolytic capacitor
By fixing the core package with a lower gasket and an insulating upper gasket, the vibration prevention problem of aluminum electrolytic capacitors in high-temperature vibration environments is solved, the stability and volume ratio are improved, core package damage and short circuits are avoided, and heat and gas are effectively discharged.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN AIHUA GROUP CO LTD
- Filing Date
- 2025-04-23
- Publication Date
- 2026-05-22
AI Technical Summary
Existing aluminum electrolytic capacitors have insufficient vibration resistance under high temperature and vibration environments, and may cause damage to the core or short circuit. In particular, the adhesive fixing effect is weakened at high temperatures, and the core size requirement is too large, which affects the volume ratio.
The core package is fixed by a lower gasket and an upper insulating gasket. The lower gasket is made of thermally conductive material and has ventilation holes. The upper insulating gasket has lead-out holes. The anode and cathode conductive foil strips are connected through the lead-out holes. The electrolytic paper on the top of the core package rests on the upper insulating gasket. Tape is wrapped around the sides of the core package for protection.
It improves the vibration resistance of aluminum electrolytic capacitors, reduces core damage, avoids short circuits, maintains volumetric efficiency, dissipates heat and gas in a timely manner, and enhances stability under high-temperature vibration environments.
Smart Images
Figure CN224266962U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an aluminum electrolytic capacitor, and more particularly to a vibration-resistant aluminum electrolytic capacitor. Background Technology
[0002] With the development of modern industrial technology, aluminum electrolytic capacitors, as an indispensable component in electronic equipment, have increasingly higher performance requirements. In terms of vibration resistance, this is mainly reflected in automotive products and some high-end industrial-grade products. Currently, the mainstream solutions include potting and reinforcing aluminum shells, as well as adding one or more waist-pressing compressions during the assembly process to fix the core package for vibration protection. Each has its advantages, but they all have their shortcomings when facing the high temperature, vibration, and long-term load conditions of the whole machine, and there is room for further optimization.
[0003] Reinforced aluminum shells are relatively common, but their vibration resistance is limited. Furthermore, as the product bulges at the bottom during use, the effect of the reinforcement will be further weakened.
[0004] The vibration test at room temperature showed good results after potting. Currently, the mainstream design of horn-shaped aluminum capacitors is bottom explosion-proof and has a high operating temperature. The glue will block the bottom explosion-proof valve, and the glue is easy to soften at high temperatures, weakening its fixing effect.
[0005] Simply adding a waist to fix the aluminum shell extruded core package seems to solve the shortcomings of the two designs mentioned above, but it has high requirements for the core package size. The core package size needs to be relatively large, which will result in a large core package volume ratio. This is not suitable for some products with long life or high gas production that require a certain amount of internal cavity volume. Moreover, directly waisting and extruding the core package may cause short circuits when vibrating in the X and Y axis directions. Utility Model Content
[0006] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art and provide a vibration-resistant aluminum electrolytic capacitor.
[0007] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows: a vibration-resistant aluminum electrolytic capacitor, comprising a shell, a core, and a sealing element; the core is sealed inside the shell by the sealing element; a lower roller groove is provided in the lower middle part of the shell, a lower gasket is provided on the lower roller groove, and the core is placed on the lower gasket; the sealing element is sealed to the shell by the shell waist and the rolled edge; an insulating upper gasket is provided between the top of the core and the waist; the core is fixed by the insulating upper gasket and the lower gasket.
[0008] Preferably, in the above-mentioned vibration-resistant aluminum electrolytic capacitor, the upper insulating pad is provided with lead-out through holes for the anode conductive foil strip and the cathode conductive foil strip.
[0009] In the aforementioned vibration-resistant aluminum electrolytic capacitor, preferably, the electrolytic paper on the core package extends beyond the upper part of the core package, and the extended electrolytic paper rests on the insulating pad.
[0010] Preferably, in the aforementioned vibration-resistant aluminum electrolytic capacitor, the lower gasket is provided with a vent hole.
[0011] In the aforementioned vibration-resistant aluminum electrolytic capacitor, preferably, the lower pad is made of a thermally conductive material, and the cathode foil of the core package is in contact with the lower pad.
[0012] Preferably, in the above-mentioned vibration-resistant aluminum electrolytic capacitor, the height of the cavity formed by the lower pad and the bottom of the outer casing does not exceed 5mm.
[0013] Compared with the prior art, the advantages of this utility model are: by fixing the core package with the lower gasket and the insulating upper gasket, the vibration resistance of the aluminum electrolytic capacitor can be improved; and it causes almost no damage to the core package. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the vibration-resistant aluminum electrolytic capacitor in Example 1.
[0015] Figure 2 This is a cross-sectional view of the vibration-resistant aluminum electrolytic capacitor in Example 1.
[0016] Figure 3 This is a schematic diagram of the core package after it has been unfolded in Example 1.
[0017] Figure 4 This is a schematic diagram of the structure of the lower gasket in Example 1.
[0018] Figure 5 This is a schematic diagram of the vibration-resistant aluminum electrolytic capacitor in Example 2.
[0019] Figure 6 This is a schematic diagram of the structure in Example 1 where the tape completely wraps around the side of the core package.
[0020] Legend
[0021] 1. Outer shell; 11. Waist; 12. Lower groove; 2. Seal; 3. Core pack; 31. Anode foil; 32. Electrolytic paper; 33. Cathode foil; 34. Anode conductive foil strip; 35. Cathode conductive foil strip; 4. Insulating upper gasket; 41. Lead-out through hole; 5. Lower gasket; 51. Vent hole. Detailed Implementation
[0022] To facilitate understanding of this utility model, the following description will be more comprehensive and detailed in conjunction with the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.
[0023] 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 be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.
[0024] 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
[0025] like Figure 1 and Figure 2 The diagram illustrates a vibration-resistant aluminum electrolytic capacitor, comprising a housing 1, a core 3, and a sealing element 2, which is a cover plate. The core 3 is sealed within the housing 1 via the sealing element 2. A lower groove 12 is provided in the lower middle part of the housing 1, which can be formed by a waist 11. A lower gasket 5 is provided on the lower groove 12, and the core 3 is placed on the lower gasket 5. The sealing element 2 is sealed to the housing 1 via the waist 11 and the rolled edge. An insulating upper gasket 4 is provided between the top of the core 3 and the waist 11. The core 3 is fixed by the insulating upper gasket 4 and the lower gasket 5. The insulating upper gasket 4 is provided with lead-out through holes 41 for an anode conductive foil strip 34 and a cathode conductive foil strip 35. In this embodiment, the insulating upper gasket 4 and the lower gasket 5 fix the upper and lower ends of the core 3, so that the core 3 will not shake within the housing 1 under vibration, thereby improving the vibration resistance of the aluminum electrolytic capacitor.
[0026] In this embodiment, the anode conductive foil strip 34 ( Figure 1 (not shown in the center) and cathode conductive foil 35 ( Figure 1 (Not shown in the middle) Through the lead-out through hole 41 on the insulating upper gasket 4, it is electrically connected to the anode terminal and cathode terminal on the cover plate; in this way, under the isolation effect of the insulating upper gasket 4, the anode conductive foil strip 34 and the cathode conductive foil strip 35 will not come into contact with the cathode foil 33 and the anode foil 31 on the core package 3, thus preventing a short circuit.
[0027] In this embodiment, the electrolytic paper 32 on the core package 3 extends beyond the upper part of the core package 3, and the extended electrolytic paper 32 rests against the insulating upper gasket 4. Since the upper part of the core package 3 rests against the insulating upper gasket 4, the electrolytic paper 32, after extending beyond the upper part of the core package 3, rests against the insulating upper gasket 4, which reduces the stress generated by the insulating upper gasket 4 on the interior of the core package 3. Figure 3 As shown, the electrolytic paper 32 on the core package 3 extends out of the top of the core package 3, that is, the electrolytic paper 32 extends out of the anode conductive foil 34 and the cathode conductive foil 35 of the core package 3.
[0028] In this embodiment, the lower gasket 5 is made of a thermally conductive material, and the cathode foil 33 of the core package 3 is in contact with the lower gasket 5. The lower gasket 5 can be made of a metal material or a graphene material. This way, after the cathode foil 33 on the core package 3 comes into contact with the lower gasket 5, the heat generated inside the core package 3 can be promptly conducted to the lower gasket 5 through the cathode foil 33, and then dissipated through the lower gasket 5 to the outer casing 1. Figure 3 As shown, the lower part of the cathode foil 33 is flush with the electrolytic paper 32. This allows the cathode foil 33 at the bottom of the core package 3 to contact the lower gasket 5 after the anode foil 31, electrolytic paper 32, and cathode foil 33 are wound together to form the core package 3. In other embodiments, the cathode foil 33 may extend beyond the bottom of the core package 3.
[0029] In this embodiment, as Figure 4 As shown, the lower gasket 5 is provided with a vent hole 51; the height of the cavity formed between the lower gasket 5 and the bottom of the outer casing 1 does not exceed 5mm. The lower gasket 5 is provided with a vent hole 51, so that when the aluminum electrolytic capacitor is in use, the gas generated can enter the cavity at the bottom of the lower gasket 5 through the vent hole 51, thereby temporarily storing it and reducing the possibility of the explosion-proof valve at the bottom of the outer casing 1 opening.
[0030] In this embodiment, the outermost part of the core package 3 is wrapped with adhesive tape. Figure 2 In the middle, tape 6 is wrapped around the center of the core package. For example... Figure 6 As shown, in other embodiments, the tape 6 completely wraps the sides of the core package 3, thus protecting the sides of the core package. When the core package diameter is large, increasing the volume ratio of the core package 3 within the outer casing 1, it can effectively prevent the sides of the core package 3 from being scratched when it is installed inside the outer casing 1.
[0031] In this embodiment, the core package 3 is fixed by the lower gasket 5 and the insulating upper gasket 4, which can improve the vibration resistance of the aluminum electrolytic capacitor and cause almost no damage to the core package 3. Example 2
[0032] In this embodiment, as Figure 5 As shown, the insulating upper gasket 4 is not provided; instead, the core package 3 is fixed by the waist 11 on the outer shell 1. The other parts are the same as in Embodiment 1.
Claims
1. A vibration-resistant aluminum electrolytic capacitor, characterized in that: The device includes an outer shell, a core package, and a seal; the core package is sealed inside the outer shell by the seal; a lower roller groove is provided in the lower middle part of the outer shell, and a lower gasket is provided on the lower roller groove, on which the core package is placed; the seal is sealed to the outer shell by the outer shell waist and the rolled edge; an insulating upper gasket is provided between the top of the core package and the waist; the core package is fixed by the insulating upper gasket and the lower gasket.
2. The vibration-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The insulating upper gasket is provided with lead-out through holes for the anode conductive foil strip and the cathode conductive foil strip.
3. The vibration-resistant aluminum electrolytic capacitor according to claim 2, characterized in that: The electrolytic paper on the core package extends beyond the upper part of the core package, and the extended electrolytic paper rests on the insulating gasket.
4. The vibration-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The lower pad is provided with ventilation holes.
5. The vibration-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The lower pad is made of thermally conductive material, and the cathode foil of the core package is in contact with the lower pad.
6. The vibration-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The height of the cavity formed between the lower gasket and the bottom of the outer shell does not exceed 5mm.