Fire Accident Simulation and Fire Emergency Technology Simulation Research of Lithium Iron Phosphate Battery in Prefabricated Compartment for Energy Storage Power Station

In order to establish a reliable thermal runaway model of lithium battery, an updated dichotomy methodology is proposed-and used to revise the standard heat release rate to accord the surface temperature of the lithium battery in simulation. Then, the geometric models of battery cabinet and prefabricated compartment of the energy storage power station are constructed based on their real dimensions, and applied to the simulation of fire accident. Three stages: initial heating stage, flame generation stage and flame propagation stage, were observed and corresponding characteristic parameters were obtained from the fire accident simulation. Finally, the fire emergency technology include fire alarm and water mist fire extinguishing system were studied. The results show that the infrared beam linear smoke detector can give the fastest warning response to the fire. Besides, the optimal parameters for water mist fire extinguishing system were obtained. The research results can not only provide reasonable methods and theoretical guidance for the numerical simulation of lithium battery thermal runaway, but also provide theoretical data for safety fire protection design of electrochemical energy storage station.