cathode_cath

BYD Blade uses a different LFP formulation from EVE or CATL — slightly higher silicon content in the anode and a different electrode coating. Independent lab testing shows excellent retention numbers on factory-spec cells. The Grade B market variability isn't a formulation problem, it's a supply chain problem. Load test every cell regardless of claimed grade.

The flat voltage curve issue compounds with age. As cells degrade, the plateau at 50% SoC becomes even flatter — what little voltage signal existed for SoC estimation disappears entirely. A Daly that was off by ±15% new will be off by ±25% at 500 cycles. Proper coulomb counting with a calibrated BMS is non-optional on LFP, not a nice-to-have.