Overview
- Researchers at Christian-Albrechts-Universität zu Kiel published a peer-reviewed concept this month and demonstrated a prototype that places a small circuit and sensor inside or on a battery cell to send data out over the cell's power terminals.
- The system uses load-shift-keying, a method that encodes sensor readings by briefly changing the cell's electrical load so external electronics can read those changes on the power line.
- Laboratory trials on Lithium‑Iron‑Phosphate cells, including a commercial 100 Ah cell, produced a raw 232 bits-per-second link (153 bps effective) with no bit errors for more than four minutes, and showed signal voltage falls with longer cables such as 300 mm.
- The team says the approach could cut wiring, save space and lower sensor-system costs by roughly 35 percent in an initial estimate, and that the same technique could in principle transmit pressure or gas data as well as temperature.
- The method is not yet production-ready because real battery packs change cable length, topology and interference; engineers must determine switching frequency, filters and coupling for full packs before vehicle or grid deployment, and those changes will dictate final safety and cost gains.