Novel aging technology of mesohigh voltage aluminum electrolytic capacitor

Abstract

The invention discloses a novel aging technology of a mesohigh voltage aluminum electrolytic capacitor. The novel aging technology adopts an aging mode of adding alternating current and the direct current and comprises the following steps that: 10+ / -0.5 V alternating-current voltage can be applied for the preaging of a cathode first, the aging time can be 9-11 min, direct-current pulse current can be then applied for two anode and cathode ends of the capacitor for the direct-current pulse aging, the direct-current pulse aging can be subjected to section processing by a 12-stage power supply, wherein 1-8 stages of the power supply are used for normal-temperature aging, 9-12 stages of the power supply are used for high-temperature and constant-voltage aging, the direct-current pulse aging time is totally to be 180+ / -5 min, the aging voltage value of the eighth stage is set to be 1.15-1.2 times than that of the rated voltage of the capacitor, the aging temperatures for the high-temperature and constant-voltage of the 9-12 stages are set to be 105+ / -2 DEG C, and the aging voltage set value and the aging voltage value of the eighth stage are the same. By adopting the aging mode by adding the alternating current and the direct current, the effect of simultaneously repairing an anode oxidation film and a cathode oxidation film is reached, the problem that a whole energy-saving lamp is easily broken when an upper line of the energy-saving lamp is aged, the leakage of electricity of a product is reduced, the heat emission of the whole energy-saving lamp is reduced under a high-frequency condition, the ability of adapting to a high ripple wave of the aluminum electrolytic capacitor can be increased , and the reliability of the product is increased.

Description

technical field [0001] The invention relates to the field of preparation of electrolytic capacitors, in particular to a novel aging process for medium and high voltage aluminum electrolytic capacitors. Background technique [0002] The aging method used in the aging process of medium and high voltage aluminum electrolytic capacitors in the past is a combination of constant current and constant voltage. Among them, aging at room temperature is constant current boosting, high temperature aging is constant voltage stepping down, and DC voltage aging is used throughout. This aging method can repair the defects in the positive electrode oxide film and remove defective products in the production process. This product will not cause problems in electronic products with low frequency lines and low ripple current. However, for electronic circuits with high-frequency feedback and high ripple current, the design of electrolytic capacitors is different from that of ordinary electrolysi...

AI Technical Summary

Problems solved by technology

However, for electronic circuits with high-frequency feedback and high ripple current, the design of electrolytic capacitors is different from that of ordinary electrolysis. The main performance is that the negative electrode foil is formed at low pressure. Therefore, the general aging process is adopted for electrolysis, and negative electrode breakdown and leakage will inevitably occur. Increase the phenomenon, the life of the product is greatly shortened

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