Toyota in Japan is taking a sustainable approach to handling used battery packs from electric and hybrid cars by repurposing them for a new purpose. The company has introduced the Sweep Energy Storage System, which utilizes high-voltage car batteries, at Mazda’s Hiroshima plant.
The innovative system is designed to serve as a buffer between the factory’s power supplies and the assembly line, ensuring a smooth and efficient energy flow. This initiative not only helps in reducing waste but also contributes to the overall sustainability goals of both Toyota and Mazda.
Repurposing old EV batteries into stationary storage is a smart way to extend their lifespan and minimize environmental impact. By giving these batteries a second life, Toyota is showcasing a commitment to sustainability and responsible resource management.
The Sweep Battery, which incorporates packs from electrified vehicles, is currently undergoing testing at Mazda’s facility. The stability of charging and discharging cycles is being closely monitored to ensure that the system can effectively power the factory or specific sections of it.
In the future, the modular battery system will play a crucial role in connecting the factory’s solar plant to the assembly line, acting as a storage unit for excess energy. Toyota has ingeniously integrated the original inverters from the cars into the system, eliminating the need for a separate management unit. This integration allows for a seamless energy flow, utilizing batteries of various capacities, chemistries, and conditions.
The first Sweep Energy Storage System, developed in collaboration with Jera, Japan’s leading power generation company, boasts impressive specifications. With an output of 485 kilowatts and a storage capacity of 1,260 kilowatt-hours, the system can handle multiple battery types, including lithium-ion, nickel-metal-hydride, and lead-acid.
Toyota’s proprietary “sweep” device plays a crucial role in managing the diverse range of batteries within the system. By controlling the energy discharge through series-connected batteries in microseconds, the device can optimize energy flow and usage, ensuring efficient operation and extending the lifespan of the batteries.
Overall, Toyota’s innovative approach to repurposing used EV batteries for stationary storage showcases a commitment to sustainability, resource efficiency, and technological innovation. By giving new life to old batteries, the company is setting a positive example for the automotive industry and promoting a more sustainable future.