A Bio-Inspired Temperature-Arousing Battery with Giant Power for Fire Alarming

摘要

Forest fire has been becoming a conscious theme as it causes huge loss oflife and ghastly impact on the ecological environment. Temperature sensorappropriate for large-area distribution in forest is rising as a subject of considerablespeculation to build a fire alarming network. This strategy needs powersupplies that can support fire alarming sensors in long term. Herein, a conceptof temperature-arousing battery (TAB) is conceived that has no energyconsumption at normal temperaturewhile becoming activated in fire scenario.The TAB is made of a thermoelectric (TE) generator deposited with exothermicand endothermic materials on its hot sink and cold sink, respectively.Learning from bombardier beetles, the exothermic reaction and endothermicreaction can only happen when the thermal-responsive switches to isolatereactants are triggered in the event of fire occurrence. Even in an isothermalatmosphere, a remarkable temperature difference is formed between twosinks of TE generator, accordingly producing a thermoelectric voltage higherthan 5.0 V and a giant power over 1.0 W, which are high enough to power awireless signal transmitter. In the practical tests, the integrated self-poweredalarming system can transmit an electrical signal in 79 s when the TABtouches a forest fire.