Batteryless Tire Pressure Monitoring System Driven by Triboelectric Energy Harvester

Abstract

Tire pressure monitoring system (TPMS) has been brought into the regulatory frameworks of many countries in the automotive market. However, a life of battery in commercial TPMSs must limited because of some safety risks and environmental problems. It is noted that energy harvesting approaches are promising to realize a batteryless TPMS. In this study, we developed a triboelectric energy harvester for mounting inside a tire to power a TPMS. The developed harvester can generate the output power more than 1 mW under the load resistance of 10 MΩ at the tire rotational speed of 50 km/h and the load force of 2kN. The 4.4 mF capacitors can be saturated at 3.5 V during approximately 70 s. Additionally, a commercial TPMS can be effectively powered by this harvester when it works.