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Thermal Network Model of Supercapacitors Stack

Thermal Network Model of Supercapacitors Stack,10.1109/TIE.2011.2158769,IEEE Transactions on Industrial Electronics,Alaa Hijazi,Paul Kreczanik,Eric Bi

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Thermal Network Model of Supercapacitors Stack  
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In the field of urban transport, supercapacitors are submitted to relative high charge and discharge currents and therefore significant heat generation occurs. It has been shown that the temperature has a great influence on the aging mechanism of supercapacitors and, by consequence, on the lifetime of the system. That is why the thermal management becomes a key issue in the study of the performance of a supercapacitors stack. In this paper, thermal modeling of a supercapacitors stack is presented and a matrix representation of the model is deduced. Validation of the model has been carried out using measurement on a developed test bench. Sensitivity of the model according to input uncertainties is finally discussed. Therefore, in order to properly qualify the lifetime and the performance of supercapacitors stack, thermal study becomes a key point. In this paper, we present the thermal modeling of a super- capacitors storage stack dedicated to supply electrical buses in case of electrical microcuts. The thermal model is based on a lumped parameter approach and an intuitive discretization of space. It takes into account the conduction, convection and transfer of mass phenomena. The stack consists of 120 supercapacitors (Maxwell BCAP 3000F 2.7 V) connected in series. Supercapacitors are distributed on both sides of the stack and each side is composed of 10 columns of 6 SC. Because of the symmetry of the stack, the problem can be reduced to the study of the half stack that is 60 SC. The supercapacitors are arranged in a staggered manner, which gives higher heat transfer rates than in line arrangement (14), (15). The proposed thermal model is based on a lumped parameter approach and the discretization of space in finite volumes. However, in order to decrease computation time, the adopted methods are based on coarse volume elements, which allow making simulation in reasonable times especially for electro-thermal models simulations. In order to validate the model, thermal test has been carried out on the industrial super- capacitors stack. In Section II, the thermal model of the stack is presented. Comparison between simulated and experimental results is illustrated in Section III. In Section IV, the sensitivity analysis of the model is discussed.
Journal: IEEE Transactions on Industrial Electronics - IEEE TRANS IND ELECTRON , vol. 59, no. 2, pp. 979-987, 2012
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