High-performance lawn-mower prototype with re-used Lithium Iron Phosphate battery

Small lawn-mowers powered by low-energy lithium batteries are on the market already. However, battery powers only the grass cutting blades while propulsion is to be done manually. Standard self-propelling lawn-mowers use noisy combustion engines or 230 V AC supplied single-phase induction machines. A self-propelled battery powered lawn-mower is developed and assembled within a prototype project. Lithium Ion batteries are the present optimal choice for mobile power from the technical side. The general high cost of such an mobile off-grid energy supply leads to employing cells in re-use. An application-adapted battery management system is realized for that purpose. As the 230 V AC drive is the original grid-powered one, we insert a commercial 12 V DC => 230 V AC inverter. In order to accomplish start-up of the induction machine some additional circuits are included.