Chip high-voltage miniature long-life aluminum electrolytic capacitor and manufacturing method thereof

Abstract

The invention belongs to the technical field of chip aluminum electrolytic capacitors and particularly relates to a chip high-voltage miniature long-life aluminum electrolytic capacitor and a manufacturing method thereof. The chip high-voltage miniature long-life aluminum electrolytic capacitor comprises outer electrolytic paper, a positive guide pin, anode foil, a negative guide pin, cathode foil and inner electrolytic paper. The positive guide pin is riveted on the anode foil and the negative guide pin is riveted on the cathode foil. The outer electrolytic paper, the anode foil, the inner electrolytic paper and the cathode foil are wound together into a core package. The riveted portions between the positive guide pin and the anode foil as well as between the negative guide pin and the cathode foil are respectively provided with a hydrophilic high temperature electrically conductive adhesive tape. The anode foil is an anode foil of high voltage withstanding and high specific volume and the cathode foil is a forming cathode foil. The inner electrolytic paper and the outer electrolytic paper are electrolytic paper of low tightness and low thickness. The chip high-voltage miniature long-life aluminum electrolytic capacitor has the advantages of being provided with one hydrophilic high temperature electrically conductive adhesive tape at the riveted portions between the positive guide pin and the anode foil as well as between the negative guide pin and the cathode foil respectively for significantly reducing the size of the core package and increasing the contact area for further achieving the characteristics of miniaturization and high temperature wave resistance of the product.

Description

technical field [0001] The invention belongs to the technical field of chip-type aluminum electrolytic capacitors, in particular to a chip-type high-voltage miniaturized long-life aluminum electrolytic capacitor and a manufacturing method thereof. Background technique [0002] In the current industry, the rated working voltage of chip aluminum electrolytic capacitors is generally not higher than 100WV. The leading Japanese companies and a few Taiwanese companies in the chip aluminum electrolytic capacitor industry have developed and produced high-voltage chip capacitors, and their rated working voltage is 400-450WV. , and its size is 8mm (outer diameter) * 12.5mm (height) or 10mm (outer diameter) * 10.2mm (height), most of the product life time at 105°C does not exceed 2000 hours, which cannot meet the requirements of end customers for patch type Capacitor volume miniaturization and life expectancy. [0003] Due to the limitation of the customer's design and use space, the ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a chip-type aluminum electrolytic capacitor with high rated operating voltage, small volume and long life, whose size is 8mm (outer diameter)*10.2mm (height) , the high temperature load life can reach more than 8000 hours at 105°C, and it can withstand high ripple current shocks, which can meet the problems of insufficient design space and short service life when used by the client.

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