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
中科院分区:
文献类型:
--
作者:
Yang H
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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