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Finite Element Simulation of Heat Dissipation Performance of Aluminum Electrolytic Capacitor

Jinlin Peng^1,*, Shen Li^1,2, Yunya Liu³

1 All-solid-state Energy Storage Materials and Devices Key Laboratory of Hunan Province, Hunan City University, Yiyang, 413002, China
2 Hunan Aihua Group Co. Ltd., Yiyang, 413000, China
3 Xiangtan University, Xiangtan, 411105, China

* Corresponding Author: Jinlin Peng. Email:

The International Conference on Computational & Experimental Engineering and Sciences 2025, 34(1), 1-1. https://doi.org/10.32604/icces.2025.012647

Abstract

The working temperature of aluminum electrolytic capacitor seriously affects its life and performance, especially when the core temperature is too high, its service life will be greatly reduced. At present, the detection of the center temperature of aluminum electrolytic capacitor needs to open a hole on the top of the aluminum electrolytic capacitor, place a thermocouple and run for a long time to reach a stable state, so as to obtain a more accurate core working temperature. According to the heating mechanism of aluminum electrolytic capacitor, the ripple current and surface temperature rise of aluminum electrolytic capacitor were tested as an example, and the finite element model of thermal simulation of aluminum electrolytic capacitor was built using COMSOL, and the core temperature of the capacitor under different working conditions was obtained quantitatively. The simulation results show that the finite element model of aluminum electrolytic capacitor with correct size and parameters can accurately simulate the global temperature rise process and stable state of the capacitor, and can effectively explain various thermodynamic phenomena during the operation of the capacitor. The simulation results of the model are consistent with the test results, and the rapid and nondestructive measurement of the temperature rise of the capacitor surface and core is realized.

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