Low-carbon environment-friendly long-service-life aluminium electrolytic capacitor

Abstract

The invention discloses a low-carbon environment-friendly long-service-life aluminium electrolytic capacitor. The aluminium electrolytic capacitor is provided with an aluminium shell and wraps a capacitor element which is wound iteratively by an anode aluminium foil, electrolytic paper, a cathode aluminium foil and electrolytic paper and is impregnated in electrolyte; the aluminium shell is sealed by using sealing rubber; a positive wire is riveted on the anode aluminium foil; a negative wire is riveted on the cathode aluminium foil, wherein a layer of cathode foil is added at the negative wire as an attached foil in a covering manner; and the thickness of the attached foil is 40+ / -4mum, the thickness of the cathode aluminium foil is 30+ / -3mum, and the width of the attached foil is narrower than that of the cathode aluminium foil by 0.5mm-1mm. The positions of cutting openings of the anode aluminium foil, the cathode aluminium foil and the attached foil are prevented from being coincided with aluminium tongue parts of the positive wire and the negative wire when a core bag is wound. The aluminium electrolytic capacitor disclosed by the invention has the advantages that the capability of the electrolysis for bearing ripple current under the high-frequency state can be improved, simultaneously, the impedance of electrolysis under the high-frequency state is further reduced, and the service life of a product is prolonged.

Description

technical field [0001] The invention relates to an electrolytic capacitor, in particular to a low-carbon and environment-friendly ultra-high temperature and long-life aluminum electrolytic capacitor. Background technique [0002] The general design and structure of the core of an aluminum electrolytic capacitor is as follows: the positive lead is riveted on the anode aluminum foil, the negative lead is riveted on the cathode aluminum foil, and then the anode aluminum foil, electrolytic paper, and cathode aluminum foil are overlapped and wound by the winding process to form an aluminum electrolytic capacitor. The internal core, this structure is suitable for ordinary energy-saving lamps and aluminum electrolytic capacitors required in other fields, but at present energy-saving lamps are used more and more widely, the use environment is getting worse and worse, and the life expectancy is getting higher and higher, so the energy-saving The performance requirements of the alumin...

AI Technical Summary

Problems solved by technology

[0002] The general design and structure of the core of an aluminum electrolytic capacitor is as follows: the positive lead is riveted on the anode aluminum foil, the negative lead is riveted on the cathode aluminum foil, and then the anode aluminum foil, electrolytic paper, and cathode aluminum foil are overlapped and wound by the winding process to form an aluminum electrolytic capacitor. The internal core, this structure is suitable for ordinary energy-saving lamps and aluminum electrolytic capacitors required in other fields, but at present energy-saving lamps are used more and more widely, the use environment is getting worse and worse, and the life expectancy is getting higher and higher, so the energy-saving The performance requirements of the aluminum electrolytic capacitor, the main component of the lamp, are also getting higher and higher. The internal structure of the above electrolysis can no longer meet the needs of long-life energy-saving lamps, especially in high-frequency circuits. In the early days, the electrolytic aluminum foil corroded and heated up, and eventually the electrolytic bottom drum was defective, resulting in early failure of the product

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