Yang Hengzhao
Department of Electrical Engineering, California State University, Long Beach, CA 90840 USA.
IEEE Trans Ind Appl. 2019;55(4):4064-4072. doi: 10.1109/tia.2019.2904017. Epub 2019 Mar 8.
This paper examines the applicability of Peukert's law to supercapacitors with constant power loads and the application of this relationship in predicting the supercapacitor discharge time during a constant power discharge process. Originally developed for lead-acid batteries, Peukert's law states that the delivered charge increases when the discharge current decreases. This paper shows that Peukert's law applies to supercapacitors when the discharge power is above a certain threshold and does not apply anymore when the discharge power is sufficiently low. This pattern is due to the combined effects of three aspects of the supercapacitor physics: porous electrode structure, charge redistribution, and self-discharge. Based on the applicability study, this paper demonstrates the effectiveness of Peukert's law in predicting the supercapacitor discharge time during a constant power discharge process by conducting extensive experiments using three supercapacitor samples with different rated capacitances from different manufacturers at various voltages.
本文研究了佩克定律对恒定功率负载超级电容器的适用性，以及该关系在预测恒定功率放电过程中超级电容器放电时间的应用。佩克定律最初是为铅酸电池开发的，该定律指出，放电电流减小时，输出电荷会增加。本文表明，当放电功率高于某个阈值时，佩克定律适用于超级电容器，而当放电功率足够低时则不再适用。这种模式是由超级电容器物理的三个方面的综合作用导致的：多孔电极结构、电荷重新分布和自放电。基于适用性研究，本文通过使用来自不同制造商的具有不同额定电容的三个超级电容器样品在不同电压下进行广泛实验，证明了佩克定律在预测恒定功率放电过程中超级电容器放电时间方面的有效性。
