Battery-less piezoceramics mode energy harvesting for automobile TPMS

Abstract

A battery-less Tire Pressure Monitoring System (TPMS) with piezoceramics mode energy harvesting is presented. A chip of power recovery circuit at piezoceramics mode is designed and implemented at Chartered 0.35µm High Voltage CMOS Process. Based on testing results, with the piezoceramics, the chip converts mechanical strain energy to DC power which provides stable voltage output around 3V, and about 10mA current for almost 20ms at recurring working mode for sensor, MCU and data transmitter to work well in a tire monitoring module of TPMS. And taking the frequency multiplication method mentioned last, the application of this type of battery-less TPMS in real car environment is hopeful1.