New energy automobile lithium battery box fire-extinguishing device

The invention discloses a new energy automobile lithium battery box fire-extinguishing device, and belongs to the technical field of battery safety. The new energy automobile lithium battery box fire-extinguishing device comprises a battery panel, a cover plate, a plurality of lithium batteries, a movable plate and a fire-extinguishing mechanism. Each lithium battery is installed inside the battery panel. The cover plate is installed on the battery panel and further matched with the battery panel. The movable plate is installed on the cover plate in a movable mode. The fire-extinguishing mechanism is installed at one end of the cover plate. According to the new energy automobile lithium battery box fire-extinguishing device, the movable plate is arranged on the cover plate, when the lithium batteries are ignited to produce smog, a smog sensor can receive signals to pull an air cylinder to act, the movable plate moves, all heat emission holes in the cover plate are covered, and air flowing of the battery panel