New Battery Tracker Makes Recycled EV Batteries Safer and Smarter
This could make cheaper, longer-lasting storage from old EV batteries possible.
Deep Dive
Researchers demonstrated a way to estimate the health and state of charge of every individual cell in a second-life battery system using only field operation data. When tested on a real system containing hundreds of cells, it found uneven degradation, a systematic state-of-charge imbalance, and two faulty cells. The approach also showed that a conventional module-level model only tracks average behavior and can miss the weakest cells, leading it to overestimate both health and charge by significant amounts.
Key Points
- This method inspects each individual cell inside a repurposed battery, not just the whole pack.
- Older methods overestimated battery health by as much as 31%, missing weak cells.
- Catches faulty cells early, making second-life batteries safer and more affordable for solar storage.
Why It Matters
Repurposed EV batteries could power your home cheaply—if we can trust them. This makes them safer.