针对超级电容在串联使用时,电压不均衡会减少电容使用寿命并影响输出功率的问题,研究了一种新型串联超级电容组电压均衡方法——开关网络均衡法.该方法在均衡过程中能量不需要经过中间暂存器件,而是通过开关网络的导通与关断直接从电压最高的超级电容单体转移到电压最低的超级电容单体来达到均衡目的.此外,本文还分析了均衡电路的原理和均衡过程,同时基于PSIM仿真软件和FPGA对三个串联超级电容进行了仿真和实际验证.实验结果表明提出的均衡方法具有良好的均衡效果.%The cycling life and output power of supercapacitors in series will degrade because of the voltage differences among individual cells. For alleviating this problem, a new voltage equalization method of switch network equilibrium method was proposed. In the equilibrium process of this method, energy can be directly transferred from the supercapacitor with the highest voltage to the one with the lowest voltage by turning on/off of the switch without intermediate temporary storage devices. In addition, the principle of voltage equalization circuit and equalization process were also investigated. Finally, simulation analysis and verification for the three supercapacitors in series via the combination of PSIM software and FPGA were conducted. The obtained results demonstrate that the proposed method has good equalization effect.
展开▼
