To evaluate a battery temperature management system, a Li-ion cell will be submerged directly into a low-boiling dielectric liquid in this work. It is important to remember that because lithium-ion batteries are subjected to high-discharge currents and temperatures, thermal management of these batteries is a major problem for electric mobility applications. First, using measurements of the cell potential, open circuit potential, and entropic heat coefficient, we offer an electrical characterization of the lithium-ion. Thermocouples and infrared thermography were used to measure the temperature. The experimental data were used to evaluate a simplified heat generating term. Subsequently, the battery was subjected to three distinct discharge current tests while submerged in a dielectric low-boiling liquid. Additionally, the case without a dielectric liquid was examined for comparison.