Aluminum electrolytic capacitor
By setting the boss, side concave position and bottom concave position on the pin guide of the aluminum electrolytic capacitor, the problems of high failure efficiency and insufficient withstand voltage of the aluminum electrolytic capacitor are solved, and lower leakage current and higher Voltage resistance improves the quality of the power supply.
Patent Information
- Application Number
- CN202323267832.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-29
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-11-29
AI Technical Summary
The existing aluminum electrolytic capacitors have problems such as high failure efficiency, poor performance consistency, small capacity value and general voltage resistance. They are especially unable to meet the circuit requirements of repeated charging and discharge, which limits the improvement of the power supply quality.
An aluminum electrolytic capacitor was designed, and the aluminum tongue of the pin guide pin was provided with a boss, side concave position and bottom concave position. Through these structures, the risk of short circuit caused by aluminum tongue stamping is avoided, thereby reducing leakage current and improving the The voltage withstandability of the capacitor.
It achieves lower leakage current and higher voltage withstandability, ensures high reliability and performance consistency of capacitors, and improves the quality of the power supply.
Smart Images
Figure CN222213958U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to an aluminum electrolytic capacitor. Background Art
[0002] Aluminum electrolytic capacitors are widely used in the design and use of power supply circuits. In the application fields of outdoor appliances, communication facilities, public power supply facilities, etc., the power supply is required to have extremely low failure rate and long life. However, the current aluminum electrolytic capacitors have the problems of high failure rate and poor product performance consistency, which seriously restricts the improvement of power supply quality. The current electrolytic capacitors have small capacitance and average voltage resistance. Although the capacitor can meet the voltage resistance requirements, it cannot withstand circuit requirements such as repeated charging and discharging. Therefore, the existing capacitors need to be further improved. Utility Model Content
[0003] The utility model aims to provide an aluminum electrolytic capacitor with low leakage.
[0004] The technical problem to be solved by the present invention is a method for manufacturing an aluminum electrolytic capacitor with low leakage, high voltage and high reliability, so as to ensure that the manufactured product has low leakage current, high withstand voltage and high reliability.
[0005] The purpose of the utility model is achieved in this way:
[0006] An aluminum electrolytic capacitor comprises an aluminum shell, a core arranged inside the aluminum shell and a cover plate sealed with an opening of the aluminum shell; the core comprises a positive aluminum foil, a negative aluminum foil and electrolytic paper separating the positive aluminum foil and the negative aluminum foil in a winding structure, the positive aluminum foil and the negative aluminum foil are respectively riveted with a positive pin guide needle and a negative pin guide needle led out through the cover plate; the positive pin guide needle comprises an aluminum tongue, an aluminum rod and an aluminum needle connected in sequence, a boss is arranged on the surface of the aluminum tongue, two rows of upper riveting protrusions and two rows of lower riveting protrusions are arranged on the surface of the boss, the two rows of upper riveting protrusions and the two rows of lower riveting protrusions are riveted to the positive aluminum foil, the two rows of upper riveting protrusions and the two rows of lower riveting protrusions are arranged at intervals up and down, the two rows of upper riveting protrusions are arranged at intervals left and right, and the two rows of lower riveting protrusions are arranged at intervals left and right, the structure of the positive pin guide needle is the same as that of the negative pin guide needle, the aluminum tongue is provided with side recesses on the left and right sides of the boss, and the aluminum tongue is provided with a bottom recess on the bottom side of the boss.
[0007] The present invention can also be further improved as follows.
[0008] The width of the side concave is .mm, and the depth of the side concave is .mm.
[0009] The width of the bottom concave is .mm, and the depth of the bottom concave is .mm.
[0010] The beneficial effects of the utility model are as follows:
[0011] The aluminum tongue of the pin guide pin of the utility model is arranged on a boss, and side recesses and bottom recesses are respectively arranged on the left and right sides and the bottom side of the boss. The side recesses and bottom recesses can effectively avoid the risk of capacitor short circuit caused by the burr of the aluminum tongue stamping, and enable the capacitor to maintain a lower leakage current. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the internal structure of the aluminum electrolytic capacitor of the utility model.
[0013] Figure 2 It is a front view of the aluminum positive electrode pin guide needle of the utility model. DETAILED DESCRIPTION
[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0015] Embodiment 1, as Figure 1 to Figure 2 As shown, an aluminum electrolytic capacitor comprises an aluminum shell 1, a core 7 arranged inside the aluminum shell 1, and a cover plate 8 sealed with an opening of the aluminum shell 1; the core 7 comprises a positive aluminum foil 2, a negative aluminum foil 3 and an electrolytic paper 4 separating the positive aluminum foil 2 and the negative aluminum foil 3 in a winding structure; the positive aluminum foil 2 and the negative aluminum foil 3 are riveted with a positive lead pin 5 and a negative lead pin 6 respectively led out through the cover plate 8; the positive lead pin 5 comprises an aluminum tongue 51, an aluminum rod 53 and an aluminum needle 52 connected in sequence, and the aluminum A boss 54 is provided on the surface of the tongue 51, and two rows of upper rivet protrusions 55 and two rows of lower rivet protrusions 56 are provided on the surface of the boss 54. The two rows of upper rivet protrusions 55 and the two rows of lower rivet protrusions 56 are riveted to the positive aluminum foil 2, the two rows of upper rivet protrusions 55 and the two rows of lower rivet protrusions 56 are spaced apart in the upper and lower directions, the two rows of upper rivet protrusions 55 are spaced apart in the left and right directions, and the two rows of lower rivet protrusions 56 are spaced apart in the left and right directions. The structure of the positive pin guide needle 5 is the same as that of the negative pin guide needle 6.
[0016] As a more specific technical solution of the utility model.
[0017] The aluminum tongue 51 is provided with side recesses 58 on the left and right sides of the boss 54 .
[0018] The aluminum tongue 51 is provided with a bottom recess 57 on the bottom side of the boss 54 .
[0019] The width of the undercut 58 is 0.1 mm, and the depth of the undercut 58 is 0.05 mm.
[0020] The width of the bottom concave position 57 is 0.2 mm, and the depth of the bottom concave position 57 is 0.05 mm.
[0021] Electrical test data table of the utility model aluminum electrolytic capacitor and traditional capacitor:
[0022]
[0023] Conclusion: The aluminum electrolytic capacitor of the utility model has a larger capacitance and a lower leakage current.
[0024] Comparison table of withstand voltage test data of the utility model aluminum electrolytic capacitor and traditional capacitors:
[0025]
[0026] Conclusion: The aluminum electrolytic capacitor of the utility model has greater capacitance withstand voltage and specific capacitance value.
Claims
1. An aluminum electrolytic capacitor, comprising an aluminum shell (1), a core (7) arranged inside the aluminum shell (1), and a cover plate (8) sealed with an opening of the aluminum shell (1); the core (7) comprises a positive aluminum foil (2), a negative aluminum foil (3) and an electrolytic paper (4) separating the positive aluminum foil (2) from the negative aluminum foil (3) in a winding structure, the positive aluminum foil (2) and the negative aluminum foil (3) being riveted with a positive lead pin (5) and a negative lead pin (6) respectively extending through the cover plate (8); the capacitor is characterized in that: The positive electrode pin guide needle (5) comprises an aluminum tongue (51), an aluminum rod (53) and an aluminum needle (52) which are connected in sequence. A boss (54) is provided on the surface of the aluminum tongue (51). Two rows of upper riveting protrusions (55) and two rows of lower riveting protrusions (56) are provided on the surface of the boss (54). The two rows of upper riveting protrusions (55) and the two rows of lower riveting protrusions (56) are riveted to the positive electrode aluminum foil (2). The two rows of upper riveting protrusions (55) and the two rows of lower riveting protrusions (56) are arranged at intervals in the upper and lower parts. The two rows of upper riveting protrusions (55) are arranged at intervals in the left and right parts. The two rows of lower riveting protrusions (56) are arranged at intervals in the left and right parts. The structure of the positive electrode pin guide needle (5) is the same as that of the negative electrode pin guide needle (6). The aluminum tongue (51) is provided with side recesses (58) on the left and right sides of the boss (54). The aluminum tongue (51) is provided with a bottom recess (57) on the bottom side of the boss (54).
2. The aluminum electrolytic capacitor according to claim 1, characterized in that: The width of the side concave position (58) is 0.1 mm, and the depth of the side concave position (58) is 0.05 mm.
3. The aluminum electrolytic capacitor according to claim 1, characterized in that: The width of the bottom concave position (57) is 0.2 mm, and the depth of the bottom concave position (57) is 0.05 mm.