Development of energy harvesting bicycle tire using flexible triboelectric nanogenerators for bicycle wheel safety light

Abstract

There is a growing demand for renewable energy sources; triboelectric nanogenerators are gaining popularity as an alternative power source for small electronics and LEDs. This study aims to develop a bicycle safety wheel light using a triboelectric nanogenerator. Develop a flexible triboelectric nanogenerator that can generate enough power for LED lights. The TENG is installed inside a 26 x 2.35-inch mountain bike and tested in different riding conditions. Adjusting tire pressure induces air separation and allows for direct contact between the dielectric materials, producing charges. Each TENG (Triboelectric Nanogenerator) will be linked to distinct sets of LEDs, which are connected to a bridge rectifier that converts the alternating current (AC) power into direct current (DC). The TENG could light up multiple LEDs when dropped in a back-and-forth motion. This study evaluates whether the pressure applied and speed are related to the TENG's maximum voltage and power output. The result shows a high correlation between the TENG's speed, maximum power, and voltage output in no-load and load conditions. At the same time, there is a strong correlation between the pressure applied to the tire and maximum power output when connected to a one megaohm load. When two Teng are installed on the tire, the Device can charge a 22-microfarad capacitor. It can generate an average of 25.61 microjoules of stored energy and energize the capacitor up to 1.517 V when ridden for 30 minutes.