Battery prefabricated cabin energy storage device with fire extinguishing and alarming functions

The utility model relates to the technical field of fire extinguishing and alarming, in particular to a battery prefabricated cabin energy storage device with a fire extinguishing and alarming function, which comprises an alarming assembly, the alarming assembly comprises a shell, a fixing block and a trigger type alarm, and the fixing block is fixedly connected to the top surface of the inner wall of the shell. When high temperature occurs, the fusing plate is fused, the second clamping block is promoted to move through the first spring, the abutting block and the round rod are promoted to move, the second clamping block is driven to move through the round rod, a calcium carbonate block is promoted to fall into a diluted hydrochloric acid solution, a large amount of carbon dioxide gas is generated, and therefore flames in the shell are rapidly extinguished; and the internal structure of the device cannot be damaged when the device extinguishes fire, the round rod pushes the abutting plate to move and make co