Fire prevention and detection device

The utility model provides a fire prevention and detection device, and relates to the technical field of fire prevention and detection. The fire prevention and detection device comprises a combustible gas sensor used for detecting data of combustible gas released by a lithium battery at the initial stage of thermal runaway; the temperature and smoke sensor comprises a temperature detection unit and a smoke detection unit which are connected and are respectively used for detecting the temperature of the lithium battery and smoke data in the environment; the controller is connected with the combustible gas sensor and the temperature and smoke sensor, and is used for acquiring the data of the combustible gas, the temperature of the lithium battery and the smoke data; and the communication unit is connected with the controller and is used for transmitting data of the controller to a battery management system and/or a fire-fighting host so as to control the lithium battery to stop charging and discharging or start