Structure and Degradation of Aluminum Electrolytic Capacitors

Narale, Sagar B.; Verma, Amit; Anand, Sandeep

doi:10.1109/npec47332.2019.9034726

Cited by 7 publications

(1 citation statement)

References 15 publications

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“…1,2 Consequently, they have become widely used in various industries including automotive, computer science, and aerospace. [3][4][5][6][7] The rated voltage of the electrolytic capacitors represents the highest operating voltage for normal operation of the product. This voltage has an upper limit, which depends on the formation voltage of anodic oxide films.…”

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Determining the Sparking Voltage of Working Electrolytes

Wang,

Yuan

et al. 2023

J. Electrochem. Soc.

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Sparking voltage is a vital parameter of the working electrolytes for aluminum electrolytic capacitors, which determines the operating voltage of the capacitors. However, the existing methods for measuring the sparking voltage suffer from low accuracy, bad reproducibility, high artificial error, etc. Here, we report a versatile approach for determining the sparking voltage of the electrolytes. By a linear fitting procedure, the voltage-time data acquired from the test experiments were transformed into a correlation coefficient-time curve. Because the abrupt correlation coefficient change due to the occurrence of sparking could be more readily identified in the correlation coefficient-time curve, the limit voltage of the electrolyte was accurately determined. Thus, this voltage was subtracted from the infrared drop in the solution to get the true sparking voltage of the electrolyte. This method prevented artificial errors arising from the direct observation or listening of sparking features, by which reliable and reproducible results can be gained by a computer program. This study provides an active support for the development of high-performance working electrolytes.

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