Three-dimensional CFD study on heat dissipation in cylindrical lithium-ion battery module

Abstract

This paper depicts about the cooling system of battery module. The battery module comprised of 12 cylindrical 18,650 type batteries. In this paper, a three-dimensional CFD study is presented for cell-to-cell heat generation in the battery module. Large spacing is assumed for safer removal of cell reaction gases in modules. The cell heat generation is computed based on the thermal model. The battery module experiences a higher temperature on the upstream side as the fluid passes across each row of cells and absorb the battery heat. Throughout the discharging process, maximum battery temperature and cell temperature uniformity are found much lower than permissible range applicable for safe operation of Li-ion module. With the supplied air conditions and inlet design, the maximum battery temperature reached at the end of its use is lower than 35 °C. The maximum cell temperature non-uniformity in a battery module is observed 4.43 °C. The results are also presented in total heat dissipated from battery module.