Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for reducing working internal voltage of aluminum electrolytic capacitor

An aluminum electrolytic capacitor and working technology, applied in electrolytic capacitors, capacitors, capacitor parts and other directions, can solve the problems of reducing the flashover voltage and conductivity of electrolytes, low hydrogen absorption efficiency of hydrogen absorbing agents, environmental pollution, etc. Self-healing properties, increased service life and reliability, improved oxidation efficiency

Active Publication Date: 2021-10-19
XI AN JIAOTONG UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After adding the hydrogen absorbing agent, it will not only reduce the internal pressure, but also increase the pressurization capacity of the solution; however, the hydrogen absorbing agent has low hydrogen absorption efficiency, less hydrogen absorption, is toxic, and will pollute the environment, reducing the The flash voltage and conductivity of the electrolyte, the corrosion of the electrode lead-out strips and the open circuit, etc., have some negative effects on the capacitor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for reducing working internal voltage of aluminum electrolytic capacitor
  • Method for reducing working internal voltage of aluminum electrolytic capacitor
  • Method for reducing working internal voltage of aluminum electrolytic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The thickness of the hydrogen storage alloy sheet is 0.02mm, the length is 30mm, and the LaNi network structure is 15mm wide. 5 . The anode uses the anode foil for low-voltage aluminum electrolytic capacitors with a withstand voltage of 10V, and the cathode uses a specific capacitance of 500μF / cm 2The cathode foil for an aluminum electrolytic capacitor, the material of the electrolytic paper is: Manila hemp (40% by mass)+Spanish grass (60% by mass), and the thickness is 40 μm. Electrolyte used for low-voltage aluminum electrolytic capacitors, including: 10% ammonium adipate, 5% ammonium succinate, 65% ethylene glycol, 10% water, 2% benzoic acid, 2% ammonium dihydrogen phosphate %, p-nitrobenzoic acid 0.05%, p-nitrobenzyl alcohol 0.05%, ammonium dichromate 3%, diethylene glycol 2.9%. The hydrogen storage alloy and the cathode sheet are riveted together on the cathode lead-out line, and then the electrolytic paper 3, the cathode sheet 2, the hydrogen storage alloy sheet...

Embodiment 2

[0048] The characteristics of the hydrogen storage alloy are as follows: the thickness is 0.03mm, the length is 2mm, the width is 10mm, LaNiCu with strip structure 4 . The anode adopts anode foil for medium and high voltage aluminum electrolytic capacitors with a withstand voltage value of 400V, and the cathode adopts a specific capacitance of 20μF / cm 2 The cathode foil for aluminum electrolytic capacitors is made of high-voltage single-layer wood pulp paper with a thickness of 30 μm. Electrolyte used for medium and high voltage aluminum electrolytic capacitors, including: 4% ammonium suberate, 1% ammonium maleate, 85% ethylene glycol, 5.9% water, 1% phosphoric acid, ammonium dihydrogen phosphate 1 %, resorcinol 0.02%, m-nitroacetophenone 0.03%, p-nitrophenol 0.02%, citric acid 1% and mannitol 1.03%. The hydrogen storage alloy and the cathode sheet are riveted together on the cathode lead-out line, and then the electrolytic paper 3, the cathode sheet 2, the hydrogen storage ...

Embodiment 3

[0052] The characteristics of the hydrogen storage alloy are as follows: two alloys with a thickness of 0.02mm, a length of 100mm, and a width of 100mm, with a strip structure, and the materials are Ti 2 Ni, Mg 2 Cu. The anode adopts anode foil for medium and high voltage aluminum electrolytic capacitors with a withstand voltage value of 400V, and the cathode adopts a specific capacitance of 40μF / cm 2 The cathode foil for aluminum electrolytic capacitors is made of high-voltage single-layer wood pulp paper with a thickness of 60 μm. Electrolyte used for medium and high voltage aluminum electrolytic capacitors, including: 5% ammonium suberate, 10% ammonium dodecanedioate, 1% dodecanedioic acid, 1% succinic acid, 71% ethylene glycol , water 5%, ammonium dihydrogen phosphate 3%, 2,4 dinitrophenol 0.05%, ethyl alcohol 1%, citric acid 1.95% and mannitol 1%. The hydrogen storage alloy and the cathode sheet are riveted together on the cathode lead-out line, and then the electrolyt...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Specific capacitanceaaaaaaaaaa
Login to View More

Abstract

A method for reducing the working internal voltage of an aluminum electrolytic capacitor comprises the steps that electrolytic paper, a cathode plate, a hydrogen storage alloy piece, electrolytic paper and an anode plate are sequentially stacked from bottom to top and then wound to form a roll core, and the roll core is filled with electrolyte to form an aluminum electrolytic capacitor. The electrolyte comprises a hydrogen absorption agent, and the mass percent of the hydrogen absorption agent in the electrolyte is 0.01-0.1%. The use amount of a hydrogen absorption agent in a traditional method is reduced, and the hydrogen storage alloy is added between the electrolytic paper and the cathode, so that the internal voltage of the capacitor is effectively reduced, the service life is greatly prolonged, the reliability is greatly improved, and the service life is more than two times of the original service life; and the boosting capacity and the oxidation efficiency of the electrolyte can be improved, repair of an anode oxide film of the aluminum electrolytic capacitor is facilitated, and the self-healing characteristic of the aluminum electrolytic capacitor can be improved, so that the frequency characteristic is improved, and the loss and the leakage current are reduced.

Description

technical field [0001] The invention belongs to the field of aluminum electrolytic capacitors, and in particular relates to a method for reducing the working internal pressure of an aluminum electrolytic capacitor. Background technique [0002] While aluminum electrolytic capacitors are growing steadily in the traditional consumer electronics field, their application fields have been expanded in many emerging fields such as energy-saving lamps, frequency conversion, and new energy along with structural transformation and technological progress. As the actual cathode of the aluminum electrolytic capacitor, the working electrolyte is related to the service temperature range of the aluminum electrolytic capacitor and whether it can achieve long life and high reliability indicators, so the requirements for the working electrolyte are getting higher and higher. [0003] Aluminum electrolytic capacitors will produce hydrogen gas during aging and working. If the gas is not eliminat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01G9/00H01G9/004H01G9/022
CPCH01G9/00H01G9/004H01G9/022
Inventor 徐友龙赵晔航王景平
Owner XI AN JIAOTONG UNIV