Neither article really explains how they are able to charge this fast, aside from “vertical integration” and slightly increased energy density in the battery design. No real details on the charging technology itself.
BYD did not go to specifics about their blade 2.0 battery that enables this, but there has to be battery chemistry and manufacturing advancements. CATL shared some details on their 12C LFP batteries before, they lowered li-ion mobility resistance, increased how the anode and cathode can accept more li-ions at faster rates. Another improvement for blade 2.0 battery is the charge curve is much better. 80 - 90 % can have much higher charging rates.
there needs to be battery chemistry improvements. Otherwise, with existing batteries, charging at these speeds will cause too much heat and shorten battery life span. BYD is offering 1.5MW charging with increased battery lifespan and without increasing the heat dissipation requirements. Another improvement compared to current crop of batteries is charge curve. Charging from 80 to 95%, BYD batteries can handle higher power than current batteries at MAX
