Electro-acoustic Charging Prolongs the Cycle Life of Lead-Acid Battery Cells

The impending electric vehicle (EV) transition anticipates the decommissioning of approximately 1.7 million metric tons of starter lighting and ignition (SLI) flooded lead-acid batteries (LABs). Notably, LABs, primarily localized in manufacturing, boast a near-circular economy with a staggering 90% recycling rate, thanks to stringent policies against toxic landfill disposals. As the automotive sector shifts from SLI toward alternatives, predominantly lithium-ion batteries, the need for renewable, dependable energy storage for off-grid EV charging stations escalates. LABs present a potentially sustainable solution, catering not only to EVs but also off-grid DC-powered households. Nonetheless, their adaptation hinges on resolving current limitations, including short cycle life and associated economic implications, with sulfation being a primary failure mode. This study introduces “electro-acoustic charging,” a dual energy input technique blending electricity and sound for LAB recharge, particularly with intermittent renewables like solar photovoltaics. Preliminary evidence underscores its capability to counteract the cycle life challenges of LABs, signifying a promising avenue for sustainable EV energy storage.