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Abstract
In this paper, a three-dimensional CFD study is presented for cell-to-cell heat generation in the battery module. The battery module is comprised of widely spaced cylindrical Li-ion cells. 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 user-defined code is used to calculate heat generation in each cell, and it considers both heats generated due to electrochemical reaction and Joule or Ohmic heating. 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