超级电容器充电过程中的双重均压研究

超级电容器作为储能器件在工业领域有着广泛的应用。为提高超级电容器模块的输出特性,延长模块的使用寿命,以面向未来航空航天器瞬时功率的应用需求为基础,文中提出一种安全可靠的超级电容器双重均压技术。通过测量恒流充放电条件下超级电容器的充放电曲线及计算单体特征参数,揭示模块中单体的不一致性。在恒流充电过程中,双重均压电路以Buck-Boost电路为主要电路,开关电阻法电路作为备用电路,使模块实现充电时的动态电压均衡并在充电结束时达到额定电压值且不出现过充现象。双重均压电路解决了超级电容器模块中因单体不一致性所致的电压不均衡问题。

Double voltage equilibrium in supercapacitor-based charging process

As an energy storage device, supercapacitors are widely used in the industrial field. In order to improve the output characteristics and extend the life of supercapacitor modules, a double voltage balancing technology for supercapacitor module is proposed in this paper, which based on the requirements of the instantaneous power for future aerospace vehicles. The charge and discharge curves of supercapacitors under constant current conditions are measured to calculate the characteristics of cells, which reveals their inconsistency. In the constant current charging process, the double voltage balancing circuit uses the Buck-Boost converter circuit as the main circuit, and the switched resistance circuit acts as a backup circuit. The cell in the module achieves dynamic voltage balance during charging and reaches the rated voltage value at the end of charging without overcharging. The double voltage balancing circuit solves the problem of voltage imbalance caused by the inconsistency of monomers in the supercapacitor module.