Maximising Piezoelectric Energy Harvesting: Overcoming Challenges and Unlocking Sustainable Power Generation

Piezoelectric generation presents a promising path towards sustainable energy. Transforming mechanical pressure into electrical power supports our pursuit of environmentally friendly solutions, contributing to a cleaner and more efficient energy landscape while reducing our reliance on traditional sources. While piezoelectric generation holds immense potential, a notable challenge is its relatively low power output. Due to the limited mechanical stress available from ambient sources like walking or vibrations, the generated energy often falls short for many applications. Innovative strategies are essential to overcome this limitation and unlock their full energy harvesting capabilities. This research focuses on optimising the power output of piezoelectric energy harvesting systems by enhancing both mechanical stress application and electrical conversion efficiency. We propose the integration of rubber stoppers and mechanical spacers onto the piezoelectric transducers to induce greater mechanical deformation, thereby improving energy conversion performance. Furthermore, we investigate the strategy of vertically stacking multiple piezoelectric transducers mounted on PCB assemblies. This stacking approach demonstrates a significant boost in cumulative energy output, with power generation increasing proportionally to the number of layered piezoelectric modules. Importantly, these advancements go beyond theoretical concepts. The improved piezoelectric system offers practical applications, such as powering LED walkways and electrical appliances. This translates into a viable and sustainable energy source that holds promise across a spectrum of real-world scenarios. By overcoming the challenges of limited power output, we unlock the full potential of piezoelectric energy harvesting, contributing to a greener future.