Abstract: The rapid development of new energy automobile industry puts forward new demand for fire protection design of automobile garage. In this article, cases of typical new energy car fires in buildings are analyzed, the first real fire test of new energy cars in storage is carried out, and measures for fire protection design of garages are discussed. The findings show that: the thermal runaway of the battery pack volatilizes gray combustible gases but the duration varies and explosive combustion is easy to occur in the garage. The thermal feedback from the inner wall of the garage is likely to accelerate the combustion of the car body, and the dura-tion of the strong combustion stage lasts for about 20% of the total combustion time. It is suggested that the fire prevention design of new energy automobile garage should focus on the detection of earlier signs of thermal runaway and the control of later combustion extent as well as the adoption of passive safety technology measures, and the garage should be installed with the recording device with sound pickup function and the separating elements with the fire-resistance rate not less than 2.00 h.

Key words: new energy vehicles, automobile garage, real fire experiment, lithium-ion battery, fire protection design