混合电极与全膜电容器的金属化膜自愈特性

Self-healing Characteristics of Metallized Hybrid Electrodes and Metallized Capacitors

金属化膜电容器的工作场强高,故其储能密度很高,但因其电极通过喷金方式引出,故其通流能力差。箔式电容器的通流能力强,但不具有自愈特性,故其工作场强低,储能密度也低。混合电极电容器可以兼具两者的优点,能在较高的场强下工作并拥有较大的通流能力。为加深对混合电容器的了解,通过模拟混合电极电容器和全膜金属化膜电容器的工作状况,研究了混合电极中金属化膜的自愈特性。结果表明自愈能量随放电电流的增加而增大;自愈点的直径随放电电压的升高而增加;自愈能量和自愈电流与放电电容大小的相关性小;相同条件下,全膜电容器金属化膜的自愈能量要小于混合电极电容器金属化膜的自愈能量。

Metallized capacitors have high energy storage density because high electrical field is applied, and have limited ability to carry current because their electrodes are lead by spraying metal, Foil capacitors have capacity of carrying high current but without self-healing ability. Capacitors with hybrid electrodes have merits of metallized capacitors and foil capacitors, It can operate under high electrical field and carry high current, The purpose of this paper is to study the self-healing characteristics of metallized film of hybrid electrode through simulating hybrid electrodes, Results show that the self-healing energy increases with the increasing current, and diameter of self-healing increases with the increasing voltage; the self-healing current and voltage is almost irrelevant to the capacitance; in the same condition, the energy of metallized film is less than that of the hybrid electrode film,