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Tab Design for Thermal Reduction in Pouch Lithium-Ion Battery by Using Finite Element Method


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DOI: https://doi.org/10.15866/iremos.v14i6.21298

Abstract


Tabs are important sections of receiving and transmitting electrical power to various equipment. However, if the internal temperature of the battery is too high, the battery getting too hot may shorten the battery life and lose its original performance. Therefore, to troubleshoot this device from overheating, there is necessary to design the suitable tabs. In this work, the developed finite element method is employed to simulate the temperature distribution of 3.65 V/20 Ah pouch battery at the C-rate of 1C, 3C, and 5C. The simulated results appear that a significant heat accumulation at the positive tab of Li-ion battery will occur when the highest discharge rate of 5C is conducted. Also, the high rate of this discharge makes the cell core of battery have a higher temperature as well. Therefore, the thermal behavior is further analyzed by adjusting the sizes of tabs, i.e., height, thickness, and width. As a result of size modifications, a reduction in the heat deposition and current density are observed. In addition, the received results also show that the tab with dimensions of 20 mm ( 0.35 mm ( 54 mm (height, thickness, and width, respectively) is the suitable size for diminishing the average temperature of the tab and cell core as well as increasing a distribution to be uniform. Regarding the temperature change, the sizes mentioned above can drop its temperature by 6.68 °C for tab and 2.03 °C for cell core as compared to the original case.
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Keywords


Lithium-Ion Battery; Tab Design; Temperature Distribution; Finite Element Method; Simulation

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