In this comprehensive DIY video, the creator demonstrates how to build a cost-effective 24V, 24Ah lithium-ion battery pack for an electric bicycle using salvaged 18650 cells from laptop batteries. Despite using low-quality cells with reduced capacity, the creator successfully assembles a battery pack that potentially offers an impressive range of up to 100 miles. The process involves carefully testing and sorting individual cells, charging them to optimal voltage, and connecting them in parallel and series configurations. The creator highlights that even lower-quality cells can be remarkably useful, with each cell costing around 85 cents. Key differences between high and low-quality cells include lower electrical efficiency, reduced capacity, faster self-discharge, and shorter lifespan. Through meticulous testing and innovative assembly techniques like using hot glue and duct tape, the creator creates a compact and functional battery pack. The final battery demonstrates remarkable efficiency, consuming only 6 watt-hours per mile, which enables the potential for extended range. This project showcases resourcefulness, technical skill, and the potential for affordable electric vehicle battery solutions using recycled components.
