Overview
- A BYD demonstration video shows a Denza Z9GT kept at −22°F (−30°C) for 24 hours go from about 20% to roughly 97% state of charge in about 12 minutes using the company’s Flash charger and second‑generation Blade LFP battery.
- BYD promotes Flash chargers that it says can deliver up to 1,500 kW to compatible lithium iron phosphate (LFP) packs and advertises 10%‑to‑70% charges in about five minutes and 10%‑to‑97% in under ten minutes in ideal lab conditions.
- The car’s post‑charge display showed nearly 626 miles of range but that figure likely reflects China’s CLTC test cycle, a lab protocol that typically produces more optimistic range numbers than Western cycles or real driving.
- BYD chairman Wang Chuanfu has said the company leaves a roughly 3% charge buffer in its test cutoffs to preserve regenerative braking after high‑power Flash sessions.
- Independent and competitor context tempers the claim because published specs and tests show lower acceptance rates in many EVs—for example Mercedes‑AMG cites up to 600 kW acceptance and an independent test found a Lucid Gravity reached 0–50% in about 12.5 minutes—so real‑world speeds will depend on vehicle compatibility, charger availability and thermal management.