How BYD got EV chargers to work almost as fast as gas pumps

Original Article ↗ Hacker News Discussion ↗

EV Fast-Charging Claims and Technology

  • BYD’s “FLASH” system reportedly uses ~1.5 MW chargers and new Blade 2.0 batteries to reach ~70% in 5 minutes and ~97% in ~9–12 minutes, with thousands of stations already built or planned in China and Europe.
  • Details of the chemistry and thermal management are only partly described: mentions of improved LFP-type cells, reduced internal resistance, better charge curves, and higher power from 80–95% state of charge.
  • Some commenters see this as an incremental step following CATL’s fast-charging work; others treat it as a major leap. Technical specifics remain unclear.

Practicality, Grid, and Infrastructure

  • Skeptics argue that 1.5 MW per stall is infeasible at scale without massive grid upgrades, calling it demo-level only.
  • Supporters counter that buffer batteries or supercapacitors at stations can smooth demand: grid charges storage steadily, which then provides short, high-power bursts.
  • Debate over using retooled gas stations vs. simpler parking-lot chargers; charging doesn’t need spill-containment infrastructure like fuel.
  • Several note that 5–10 minutes is already “good enough” because drivers typically want a break after ~300–400 miles.

Battery Lifespan and Degradation

  • Concerns that ultra-fast charging will shorten battery life, based on e-bike and older EV experience.
  • Others cite data suggesting modern EVs degrade ~1.5–3% capacity per year, with faster charging modestly increasing wear, and argue batteries will outlast the car for most users.
  • LFP chemistry is described as heavier but cheaper, safer, and longer-lived, increasingly moving upmarket.

User Experience and Infrastructure Gaps

  • In dense or EV-friendly regions with strong fast-charger networks, many users already find ~150 kW / ~20-minute stops acceptable.
  • In sparse regions (e.g., Canadian prairies), limited 50–100 kW chargers force 1 hour of charging per 2 hours of driving; faster charging would be a major quality-of-life improvement and reduce queues.

Geopolitics, Industrial Policy, and Protectionism

  • Strong thread on whether the US and Europe are “falling behind” China due to political dysfunction, fossil-fuel interests, and lack of long-term industrial strategy.
  • Others highlight China’s heavy subsidies, capital controls, and authoritarian system, questioning fairness and whether the West should deepen economic dependence on a rival.
  • Bans or barriers on Chinese EVs are seen either as necessary protection or as consumers being denied superior tech.