Thermal Analysis of a Fast Charger for Public Service Electric Vehicles Based on Supercapacitors

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2024-04-10 DOI:10.3390/batteries10040128

J. Pedrayes, María F. Quintana, G. A. Orcajo, Enrique E. Valdés Zaldivar, M. G. Melero, M. F. Cabanas

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Abstract

The aging of supercapacitors (SCs) depends on several factors, with temperature being one of the most important. When this is high, degradation of the electrolyte occurs. The impurities generated in its decomposition reduce the accessibility of the ions to the porous structure on the surface of the electrode, which reduces its capacity and increases its internal resistance. In some applications, such as electric vehicles whose storage system consists of SCs, fast chargers, which supply very high power, are used. This can lead to an increase in temperature and accelerated aging of the cells. Therefore, it is important to know how the temperature of the SCs evolves in these cases and what parameters it depends on, both electrical and thermal. In this contribution, mathematical formulae have been developed to determine the evolution of the temperature in time and its maximum value during the transient state. The formulae for obtaining the mean and maximum temperature, once the thermal steady state (TSS) has been reached, are also shown, considering that the charger cells are recharged from the grid at a constant current. Based on this formulation, the thermal analysis of a specific case is determined.

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基于超级电容器的公共服务电动汽车快速充电器的热分析

超级电容器（SC）的老化取决于多个因素，其中温度是最重要的因素之一。当温度较高时，电解质会发生降解。分解过程中产生的杂质会降低离子进入电极表面多孔结构的可能性，从而降低其容量并增加其内阻。在某些应用中，如电动汽车（其存储系统由太阳能电池板组成），会使用提供高功率的快速充电器。这会导致温度升高，加速电池老化。因此，了解在这些情况下蓄电池的温度是如何变化的，以及它取决于哪些电气和热参数是非常重要的。在本文中，我们开发了数学公式来确定温度随时间的变化及其在瞬态期间的最大值。此外，考虑到充电器电池以恒定电流从电网充电，还给出了在达到热稳定状态（TSS）后获得平均温度和最高温度的公式。在此基础上，确定了特定情况下的热分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.