In order to prevent the safety problems caused by gas generation from thermal runaway of batteries in the energy storage prefabricated cabins,a full-scale gas diffusion model of thermal runaway in energy storage prefabricated cabin was es-tablished by using the CFD numerical simulation method.The diffusion law of gases and the smoke exhaust effect of cabin un-der various ventilation schemes were analyzed.The results show that under the windless conditions,the combustible gases will diffuse to the top center of cabin at 73.5 seconds.Under the ventilation conditions,the response time of gas monitoring and warning is earlier than under windless conditions.The indoor ventilation will change the diffusion law and accumulation of thermal runaway gases.When supplying air at the top,the gases mainly accumulate on the opposite side of air supply outlet,while when supplying air at the bottom,the gases mainly accumulate near the air supply outlet.It is necessary to select the smoke exhaust positions in combination with ventilation schemes to improve the smoke exhaust efficiency,and when there is no ventilation,the top smoke exhaust should be selected.A design strategy of ventilation and smoke exhaust for prefabricated cabins based on the simulation technology is proposed.The research results can provide reference for the design and optimiza-tion of ventilation and smoke exhaust schemes of the energy storage systems.
energy storage prefabricated cabinventilation and smoke exhaustgas diffusionbattery thermal runawaysimulation
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