A traction battery pack assembly with compartmentalized battery arrays and an exhaust system to manage thermal energy levels. This allows. . Tutorial model of an air-cooled battery energy storage system (BESS). The model includes conjugate heat transfer with turbulent flow, fan curves, internal screens, and grilles. It features several interesting aspects: Fully parameterized geometry, which can be modified for different cell sizes. . Abstract: The utility model discloses an air cooling structure for a battery pack of a new energy vehicle, which comprises a structural body, and both ends of the inner part of the protective frame are provided with limited position rods, and an inserting plate one is provided inside the inserting. . In fact, research shows Li-ion batteries live about 20 percent longer at 20°C vs 30°C, and life drops by about 40 percent at 40°C. Hot spots in a pack can trigger runaway and fires. Thus thermal management is critical.