开关电源中铝电解电容器长寿命技术的研究

Research on long life aluminum electrolyric capacitor used in switch supplies

开关电源依其重量轻、小型化、输入电压范围宽、功率密度／转换效率高、待机功耗小等优点，得到迅速发展和应用，是当今电子信息产业化中不可缺少的一种产业支撑。相应要求作为关键结构器件铝电解电容器，高温下长寿命化及耐大纹波电流。通过提高工作电解液的电导率、降低导针与铝箔的接触电阻以及优选低密度电解等手段，研制出的产品在105℃高温下全负荷稳定工作达8000小时。

Switching power supply because of its light weight, small, wide range of input voltage, power density and high efficiency, small power consumption and so many advantages, applications have been developed rapidly, is a kind of electronic industry, the rapid development of electronic information industry indispensable. Requirements of aluminum electrolytic capacitors of high temperature corresponding to the long life, high ripple current. To improve the conductivity of electrolyte, through the lower contact resistance guide needle and the aluminum foil and optimization of low density electrolysis, developed the product of high temperature of 105 ℃ burden by 8000 hours.