-55℃ ultra-low temperature lead pin type safety aluminum electrolytic capacitor production method and structure

Abstract

The invention discloses a production method and structure of a -55°C ultra-low temperature guide pin type safety aluminum electrolytic capacitor. By cutting cathode foil, anode foil, inner layer electrolytic paper and outer layer electrolytic paper according to specifications, and Nail winding in turn, configure capacitor liquid for immersion, assembly, casing, aging treatment, and final product testing, to obtain capacitors, and the structure of capacitors includes aluminum shell, rubber tube, guide needle group, cover body, double-layer electrolytic paper, and the anode foil and cathode foil which are interspersed between the electrolytic papers; in the production process of the capacitor, by reasonably selecting the electrolyte solvent, solute and additives, the low temperature resistance of the electrolyte is effectively improved, and the capacitor can be Withstand higher temperature, prolong the service life by improving the heat dissipation capacity, and improve the attenuation capacity of the aluminum electrolytic capacitor's ultra-low temperature capacity of ‑55°C reduced from 30% to 20%.

Description

technical field [0001] The invention relates to a production method and a structure of a -55°C ultra-low temperature lead-pin type safety aluminum electrolytic capacitor. Background technique [0002] At present, electronic products have become an indispensable part of modern life, and various types of electronic products and electronic equipment are widely used in all aspects of people's life, such as production, transportation, and entertainment. Among them, the low temperature response time is slow or the problem cannot be started. Therefore, the temperature resistance of electronic products is a factor that must be considered for electronic products. Aluminum electrolytic capacitors, as the first filter element after the rectification of electronic circuits, IC start-up power supply elements and the last element of output filtering, are one of the indispensable components in the power supply of various electronic products. If the electronic product is in an ultra-low t...

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Problems solved by technology

[0004] However, due to design defects, the current ultra-low temperature guide pin type safety aluminum electrolytic capacitor can only guarantee the capacity decay within 30% in the environment above -40°C, and cannot guarantee the capacity decay within 30% at the lower ambient temperature. within %

The electrolyte uses ethylene glycol water system plus traditional additives, which is likely to cause premature failure of the capacitor life

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