Thermal simulation for lithium-ion capacitor during discharge process

doi:10.12028/j.issn.2095-4239.2019.0066

Abstract

Abstract: The thermal behaviors of lithium-ion capacitor, as a new kind of electrochemical energy devices, have not yet attracted sufficient attentions so far. Therefore, it is significant to study the temperature distribution of lithium-ion capacitor under various conditions. In this paper, the threedimensional finite element model was established and a finite element software Workbench was employed to simulate temperature distribution at different ambient temperatures and discharge rates. The results show that the temperature of capacitor increases gradually with the discharge process going on and the highest temperature appears in the center of cell. Meanwhile, the internal temperature difference are less affected by ambient temperature. More importantly, the comparison between the simulation and experimental results shows that the heat generation model can reflect the temperature variation of the lithium ion capacitor very well during the discharge process, which is helpful to the performance optimization and structure design of lithium ion capacitors.

Key words: lithium ion capacitors, temperature distribution, thermal simulation, ambient temperature, discharge rate

CLC Number:

TM53

ZHANG Yaosheng, LIU Zhien, SUN Xianzhong, AN Yabin, ZHANG Xiong, MA Yanwei. Thermal simulation for lithium-ion capacitor during discharge process[J]. Energy Storage Science and Technology, 2019, 8(5): 922-929.

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