Aluminum electrolytic capacitor
By designing a 0.2-1mm core pack and rubber plug gap in an aluminum electrolytic capacitor, and setting a shoulder and neck in the guide needle to position the rubber plug, the problem of damage to the core pack structure caused by the deformation of the rubber plug during the potting process of traditional aluminum electrolytic capacitors is solved, ensuring the normal use of the capacitor.
Patent Information
- Application Number
- CN202420255827.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-02-02
AI Technical Summary
During the casting and sealing process of traditional aluminum electrolytic capacitors, the core pack structure is easily damaged due to the deformation of the rubber plug, resulting in abnormalities such as short circuits, which affects the use.
An aluminum electrolytic capacitor is designed, with a gap of 0.2-1 mm between the core package and the rubber plug, and a shoulder and neck are provided in the anode guide needle and the cathode guide needle to position the rubber plug to ensure the retaining of the gap.
Even if the rubber plug deformation during the casting process of the potting glue, it will not affect the structure of the core pack and ensure the normal use of the capacitor.
Smart Images
Figure CN222705323U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an aluminum electrolytic capacitor, in particular to an aluminum electrolytic capacitor suitable for casting with potting glue. Background Art
[0002] As the main component of electronic products, aluminum electrolytic capacitors play an irreplaceable role in circuits. With the continuous innovation and upgrading of electronic products, traditionally designed aluminum electrolytic capacitors cannot meet new application requirements. How to make aluminum electrolytic capacitors suitable for different application scenarios and play various positive roles has become a difficult problem for capacitor developers.
[0003] With the development trend of traditional detonators to electronic detonators and the development of power supplies using various potting technologies, the traditionally designed capacitors in this application scenario will be sealed by potting glue. Due to the external injection pressure and the chemical reaction of the potting glue, the rubber plug of the aluminum electrolytic capacitor is particularly prone to deformation, resulting in damage to the core package structure inside the capacitor and abnormalities such as short circuits, which seriously affects customers' use of aluminum electrolytic capacitors. Utility Model Content
[0004] 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 suitable for casting with potting glue.
[0005] 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 rubber plug, the core package is sealed in the shell by the rubber plug, the core package includes an anode foil, electrolytic paper and a cathode foil, the anode foil and the cathode foil are riveted with an anode guide pin and a cathode guide pin respectively, and a gap of 0.2-1mm is formed between the top of the core package and the rubber plug.
[0006] In the above-mentioned aluminum electrolytic capacitor, preferably, the anode guide pin and the cathode guide pin both include a lead wire, an aluminum stem and an aluminum tongue, the lead wire and the aluminum tongue are respectively arranged at both ends of the aluminum stem, a shoulder neck portion is arranged between the aluminum stem and the aluminum tongue, the length of the shoulder neck portion is greater than the diameter of the aluminum stem, and the width of the shoulder neck portion is 0.2-1 mm.
[0007] In the above-mentioned aluminum electrolytic capacitor, preferably, the aluminum tongue of the cathode guide pin extends out of the bottom of the core package and contacts the bottom of the shell.
[0008] Compared with the prior art, the utility model has the advantages that: in the aluminum electrolytic capacitor of the utility model, a gap of 0.2-1 mm is formed between the rubber plug and the top of the core package; when the potting glue is poured and cured and sealed, even if the rubber plug has a certain deformation, it will not affect the core package, thereby ensuring the normal use of the aluminum electrolytic capacitor. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is a schematic diagram of the structure of the outer shell inner core package and the rubber plug in Example 1.
[0010] Figure 2 Schematic diagram of the structure of the anode guide needle or the cathode guide needle in Example 1.
[0011] Figure 3 This is a schematic diagram of the structure of the outer shell inner core package and the rubber plug in Example 2.
[0012] Figure 4 Schematic diagram of the structure of the anode guide needle or the cathode guide needle in Example 3.
[0013] Legend
[0014] 1. Rubber plug; 2. Core bag; 3. Anode guide pin; 4. Cathode guide pin; 5. Lead wire; 6. Aluminum stem; 7. Shoulder and neck; 8. Aluminum tongue. DETAILED DESCRIPTION
[0015] 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.
[0016] 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.
[0017] 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
[0018] like Figure 1 An aluminum electrolytic capacitor shown in the figure includes a shell (not shown in the figure), a core package 2 and a rubber plug 1. The core package 2 is sealed in the shell by the rubber plug 1. The core package 2 is wound by an anode foil, an electrolytic paper and a cathode foil. An anode guide pin 3 and a cathode guide pin 4 are riveted to the anode foil and the cathode foil respectively. A gap of 0.2-1 mm is formed between the top of the core package 2 and the rubber plug 1.
[0019] like Figure 2As shown, in this embodiment, the anode guide pin 3 and the cathode guide pin 4 both include a lead wire 5, an aluminum stem 6 and an aluminum tongue 8, the lead wire 5 and the aluminum tongue 8 are respectively arranged at the two ends of the aluminum stem 6, and a shoulder neck 7 is arranged between the aluminum stem 6 and the aluminum tongue 8, the length of the shoulder neck 7 is greater than the diameter of the aluminum stem 6, and the width of the shoulder neck 7 is 0.2-1mm; in this embodiment, the length of the shoulder neck 7 is less than the width of the aluminum tongue 8. When the aluminum electrolytic capacitor is assembled, the shoulder neck 7 is pressed against the rubber plug 1, thereby positioning the rubber plug 1, so that the rubber plug 1 cannot be further approached to the core package 2 along the aluminum stem 6, thereby ensuring the spacing between the core package 2 and the rubber plug 1.
[0020] In the aluminum electrolytic capacitor of this embodiment, a gap of 0.2-1 mm is formed between the rubber plug 1 and the top of the core package 2; when the potting glue is poured and cured and sealed, even if the rubber plug 1 is deformed to a certain extent, it will not affect the core package 2, thereby ensuring the normal use of the aluminum electrolytic capacitor. Example
[0021] In aluminum electrolytic capacitors, since the thickness of the anode foil is 4-7 times that of the cathode foil, after the anode guide pin 3 and the cathode guide pin 4 are riveted to the anode foil and the cathode foil respectively, the stress that the riveted part of the anode guide pin 3 and the anode foil can withstand is 8 to 20 times the stress that the riveted part of the cathode guide pin 4 and the cathode foil can withstand. During the riveting process, since the rubber plug 1 will press against the shoulder 7 of the anode guide pin 3 and the cathode guide pin 4, the riveted part of the cathode guide pin 4 and the cathode foil is prone to deformation. In view of this situation, in this embodiment, if Figure 3 As shown, the aluminum tongue 8 of the cathode guide pin 4 extends out of the bottom of the core package 2 and contacts the bottom of the shell. In this embodiment, the length of the aluminum tongue 8 of the cathode guide pin 4 is lengthened so that the aluminum tongue 8 extends out of the bottom of the core package 2 after the cathode guide pin 4 is riveted on the cathode foil, and the aluminum tongue 8 of the cathode guide pin 4 contacts the shell after the core package 2 is loaded into the shell. In this embodiment, when the rubber plug 1 is assembled, it is pressed against the shoulder and neck 7 of the cathode guide pin 4 and the anode guide pin 3. Since the aluminum tongue 8 of the cathode guide pin 4 contacts the shell and presses against the shell, even if the rubber plug 1 is pressed against the shoulder and neck 7 of the cathode guide pin 4, the main force point will be transferred to the shell by the aluminum tongue 8, thereby protecting the riveted portion of the cathode guide pin 4 and the cathode foil.
[0022] The other parts of this embodiment are the same as those of Embodiment 1. Example
[0023] like Figure 4As shown, in this embodiment, the anode guide pin 3 and the cathode guide pin 4 both include a lead wire 5, an aluminum stem 6 and an aluminum tongue 8, the lead wire 5 and the aluminum tongue 8 are respectively arranged at both ends of the aluminum stem 6, a shoulder neck 7 is arranged between the aluminum stem 6 and the aluminum tongue 8, the length of the shoulder neck 7 is greater than the diameter of the aluminum stem 6, and the width of the shoulder neck 7 is 0.2-1mm; the width of the aluminum tongue 8 is less than the length of the shoulder neck 7. The other parts of this embodiment are the same as those of embodiment 1.
Claims
1. An aluminum electrolytic capacitor, characterized in that: It comprises an outer shell, a core package and a rubber plug. The core package is sealed in the outer shell by the rubber plug. The core package comprises an anode foil, electrolytic paper and a cathode foil. Anode guide pins and cathode guide pins are riveted on the anode foil and cathode foil respectively. A gap of 0.2-1 mm is formed between the top of the core package and the rubber plug.
2. The aluminum electrolytic capacitor according to claim 1, characterized in that: The anode guide needle and the cathode guide needle both include a lead wire, an aluminum stem and an aluminum tongue, wherein the lead wire and the aluminum tongue are respectively arranged at two ends of the aluminum stem, and a shoulder neck is arranged between the aluminum stem and the aluminum tongue, wherein the length of the shoulder neck is greater than the diameter of the aluminum stem, and the width of the shoulder neck is 0.2-1 mm.
3. The aluminum electrolytic capacitor according to claim 1, characterized in that: The aluminum tongue of the cathode guide pin extends out of the bottom of the core package and contacts the bottom of the shell.