高比功率复合电源  

Composite power supply with high power density

作　　者：张宜楠[1] 胡树清[1] 杜志忠[1] 

机构地区：[1]信息产业部电子第十八研究所,天津300381

出　　处：《电源技术》2002年第5期341-343,共3页Chinese Journal of Power Sources

摘　　要：介绍了一种将电容器与蓄电池组合成的复合电源 ,该复合电源充分利用电容器具有的高比功率输出特性为负载提供瞬间大电流 ,同时还利用蓄电池的储能特性 ,在电容器放完电后为其充电。它可为负载提供大电流脉冲放电。其原理是电容器充电时 ,电压UC 以指数形式趋近于它的最终恒定值US,电容器对负载放电时 ,电容上电压UC 从U0 按指数规律衰减 ,电流I则从 0跃变到U0 /R后按同一指数规律衰减 ,选择合适的时间常数τ ,就可以调整放电电流的大小和放电电压的高低 ,在短时间内提供较大的输出功率 ,而其本身并不消耗能量。利用电容器这一特性 ,把它和化学电池结合起来 ,组成了具有较高比功率的复合电源。A composite power supply combined with capacitor and batteries was introduced. The characteristic of capacitor, i.e. the output with high power density, was applied completely in the device for providing instantaneous large current for load. The energy storage characteristic of battery was also applied in the device to recharge capacitor after discharge. It can provide large pulse current to load for discharge. The working principle of the composite power supply is that when capacitor is charging, the voltage U C trends to its final constant value U S exponentially; when capacitor is discharging with load, the voltage U C decays from U 0 by exponential regulation while the current I transits into U 0/R and then decays according to the same exponential regulation. The discharge current and discharge voltage can be adjusted by selecting the appropriate time constant τ, thus large output power can be provided in short moment whereas energy will not be consumed from its own. The composite power supply combined the capacitor with chemical battery, so it has high power density.

关 键 词：高比功率复合电源 电容器 比功率 蓄电池 

分 类 号：TM912[电气工程—电力电子与电力传动]