Project Description:
This project proposes the design, fabrication, and testing of a novel hybrid power system to extend the operational life of pacemaker batteries. The primary motivation is to reduce the frequency of high-risk battery replacement surgeries. Our approach deviates from traditional recharging models. Instead, we will develop a system focused on load reduction. We will design and build a proof-of-concept glucose biofuel cell (G-BFC) that harvests electrochemical energy directly from glucose, a fuel source abundant in the body. This G-BFC is not intended to power a pacemaker battery directly. The low-power output from the G-BFC will charge a supercapacitor, which will act as an energy buffer. This G-BFC/supercapacitor unit will then be connected in parallel with the pacemaker's primary battery. Additionally, a Schottky Diode is placed in series with the terminals of each battery to prevent the voltage from the battery (3V) from forcing current back into the G-BFC, ensuring that the battery does not charge the G-BFC. Lastly, a DC-DC boost converter is necessary to step up the (~0.5V) from the G-BFC to 3V, which is consistent with the battery to prevent further current leakage. By providing a supplemental power source, our hybrid system will reduce the current drawn from the main battery, thereby extending its effective lifespan.
