"In 2022, the automaker provided details about the Sweep Energy Storage System which, a Toyota statement explained, made use of "batteries reclaimed from electrified vehicles (HEV, PHEV, BEV, FCEV)." (The first such system began operations in October of that year.) The "sweep" part of this concept refers to a piece of engineering that allows fuller use of older batteries, enabling them to be utilized "to their full capacity regardless of their level of deterioration.""
"In an article for Autoblog, Stephen Edelstein explained the significance of these new tests and of Toyota's system in general. He notes that Toyota's technology "theoretically allows for battery packs with different cell types, chemistries, and different states of health to be used together. That's important, given that Toyota won't able to control which batteries end up in the discard pile.""
Old EV batteries can be repurposed for energy storage and grid services. A U.S. startup uses reclaimed batteries in microgrids, and Toyota developed the Sweep Energy Storage System using batteries reclaimed from HEV, PHEV, BEV, and FCEV vehicles, with first operations in October 2022. The system’s "sweep" engineering enables fuller use of older batteries to their full capacity regardless of deterioration. Toyota and Mazda began testing the system at Mazda’s Hiroshima factory to regulate renewable power supply and demand. The technology can theoretically combine packs with differing chemistries and states of health, allowing mixed discarded batteries to be used together.
Read at InsideHook
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