Thermal simulation analysis of a supercapacitor module charge-discharge cycle based on the Fluent software

doi:10.19799/j.cnki.2095-4239.2020.0329

Abstract

Abstract:

During charging and discharging, a supercapacitor used for energy storage generates heat owing to internal resistance, which increases the internal temperature of the capacitor. If temperature inside a supercapacitor is very high, the capacitor's performance deteriorates, cycle life reduces, and electrolyte evaporates and damages the capacitor. This study simulates the charging and discharging processes of a supercapacitor module (single series 40 A charge/519.5 A discharge) and obtains temperature distribution inside the capacitor and the welding point between the supercapacitor terminal and aluminum bar and between the aluminum bar and whole module under natural cooling at 25 °C using Fluent. A heat generation model of the supercapacitor module is established to simulate its heat generation and heat generation rate under cycle conditions, which provides a basis for research on thermal management systems of supercapacitor modules.

Key words: supercapacitor, cyclic conditions, simulation, heat dissipation

CLC Number:

TB 21

Xiangdong LI, Rui LIAN, Jiamei WU, Lianghui TANG, Zhijun QIAO, Dianbo RUAN. Thermal simulation analysis of a supercapacitor module charge-discharge cycle based on the Fluent software[J]. Energy Storage Science and Technology, 2021, 10(2): 732-737.

Figures/Tables 12

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类别	密度/kg·m^-3	比热容/J·(kg·K)^-1	导热系数/W·(m·K)^-1
铝合金	2700	896	170
导热硅胶	3450	1000	5
空气	1.173	1005	0.0267

类别	密度/kg·m^-3	比热容/J·(kg·K)^-1	导热系数/W·(m·K)^-1
电芯	1220	1016.78	0.7
铝合金	2700	896	170
导热硅胶	3450	1000	5
空气	1.173	1005	0.0267
固定架	1050	1500	0.2

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