BYD's original Blade cell was a long “sword”: a thin LFP prism close to a metre long, spanning the pack and doubling as a structural beam. RWTH Aachen's 2025 teardown of that first-generation cell measured about 160 Wh/kg, and praised its thermal behaviour at conventional charge rates. Very high currents expose the weakness of a long cell. Current must travel further along the electrode foil, raising resistance, and heat builds toward the cell core, where it is hardest to remove. BYD says Blade 2.0 has a revised geometry for flash charging; a shorter current path limits that core heating, though the new dimensions have not yet been independently published.
| Metric | Original Blade | Blade 2.0 |
|---|---|---|
| Cell geometry | Long “sword” prism, ~1 m class | Revised for flash charging; dimensions not independently published |
| Cell energy density | ~160 Wh/kg (RWTH Aachen, 2025) | ~179.6 Wh/kg (teardown estimate) |
| Pack energy density | — | ~132 Wh/kg (teardown estimate) |
| Cell-to-pack mass integration | — | ~73.5% |
| Fast-charge profile | Conventional DC fast charging | 10–70% ~5 min; 10–97% ~9 min (BYD, 1,500 kW) |
| Pack cell count | Varies by model | 170 cells in series (teardown) |
| Repairability | Cell-to-pack, limited | Adhesive across modules, busbars, tabs and wiring; destructive disassembly |
Taking it apart was brutal. The team froze the pack for about 40 hours to make the adhesive brittle, then spent roughly eight hours grinding, sawing and levering it apart. Heat and chemical solvents could not be used safely near intact cells. There are no serviceable modules: structural adhesive bonds the cells, busbars, tabs and even wiring into one monolithic structure.
That bonding is what delivers the integration figure. The team's estimates of about 179.6 Wh/kg per cell and 132 Wh/kg per pack mean roughly 73.5% of pack mass is active cells. The lifecycle cost is serious. A single faulty cell or crash-damaged section can turn into a full pack replacement, which pushes insurers toward total-loss write-offs and leaves recyclers with expensive, energy-intensive disassembly. For powertrain architects and asset investors, Blade 2.0 shows how much density is gained, and how much circularity is lost, when the pack itself becomes the structure.