2.2.3. Immersive Solutions

This method helps to make the performance of the heat pipes system more efficient. Adopted by Tesla, it puts about 25% of the cell lateral surface in direct contact with the cold plate, with the cooling liquid circulating inside. The liquid circulates in metal thin pipes embedded in an extruded compound with the function of the thermal interface layer and electric insulation between the cells and the cooling medium. The remaining internal volume among cells is filled by a thermal interface that is constituted by intumescent gel, which is not electrically conductive. This material coats the sidewall of the cell casing, which is not in contact with the cold plate, and the space at both cell sides between the terminal and the metal connection plate.
