Thermal Management of Large-Format Cylindrical Lithium-Ion Cells

Current battery electric vehicles show a high variance in the battery cell technologies and thermal management concepts. These significantly influence the battery pack's energy density and thermal performance. In this work, cylindrical 21700 and 4680 battery cells are compared in terms of thermal performance with bottom and side cooling. It is shown that the design of the electrical tabs and the housing material significantly influence the maximum temperatures occurring in the cells and, thus, must be optimized holistically in the system. For 21700 battery cells, side cooling represents the more powerful cooling, whereas bottom cooling is thermally advantageous for 4680 battery cells with a tabless design.     «

Current battery electric vehicles show a high variance in the battery cell technologies and thermal management concepts. These significantly influence the battery pack's energy density and thermal performance. In this work, cylindrical 21700 and 4680 battery cells are compared in terms of thermal performance with bottom and side cooling. It is shown that the design of the electrical tabs and the housing material significantly influence the maximum temperatures occurring in the cells and, thus, m...     »