Peukert's Law for Supercapacitors with Constant Power Loads: Applicability and Application.

Peukert's Law for Supercapacitors with Constant Power Loads: Applicability and Application.
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DOI:
10.1109/tia.2019.2904017
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发表时间:
2019
影响因子:
4.4
通讯作者:
Yang H
Yang H
中科院分区:
工程技术2区
文献类型:
--
作者:
Yang H

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本文探讨了Peukert定律的适用性,以超级电容器与恒定功率负载和应用这种关系在预测的超级电容器放电时间在恒定功率放电过程中。Peukert定律最初是为铅酸电池开发的,它指出,当放电电流降低时,输送的电荷会增加。本文表明,Peukert定律适用于超级电容器时,放电功率高于一定的阈值,并不适用时,放电功率足够低。这种模式是由于超级电容器物理学的三个方面的综合影响:多孔电极结构,电荷重新分布和自放电。在适用性研究的基础上,本文证明了Peukert定律在恒定功率放电过程中预测超级电容器放电时间的有效性,通过使用来自不同制造商的不同额定电容的三个超级电容器样品在各种电压下进行广泛的实验。
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.
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