Research on heat dissipation of cabinet of electrochemical energy storage system

When lithium batteries are charged and discharged in electrochemical energy storage systems, significant internal electrochemical reactions occur, generating substantial heat and causing a rise in battery temperature. This can adversely affect battery performance and lifespan, and in severe cases, lead to thermal runaway, threatening the safety of the entire system. Research on the thermal modeling of lithium-ion batteries, accurate description and prediction of temperature rise, and the design of thermal management systems based on numerical heat flow simulations are crucial for ensuring safe and reliable battery operations. These efforts are vital for advancing new energy technologies. However, most existing research on heat dissipation in energy storage systems focuses solely on single air-cooled or liquid-cooled systems, which often have simple structures and poor heat dissipation effects. Based on the actual size of an energy storage products, this thesis establishes a comprehensive energy storage system model, incorporating the lithium-ion battery heat generation module, liquid cooling plate module, and air cooling module. Using Fluent software, various module structures are simulated to investigate different inlet and outlet positions of the liquid cooling plates, as well as the heat dissipation effects of different inlet and outlet structures of the energy storage cabinet. The optimal arrangement structure is then selected. Additionally, a guide plate is added to the module to alter the temperature and flow fields within the energy storage cabinet, further enhancing the cooling effect. The overall temperature equalization of the lithium-ion battery module is significantly improved, with the maximum temperature difference controlled within 10°C.