BYD is bringing its 5-min 'Flash' electric car charging to Canada

Original Article ↗ Hacker News Discussion ↗

Battery longevity and ultra-fast charging

  • Several commenters ask how 5‑minute “Flash” charging affects battery life; consensus: unknown for this specific tech, but:
    • Studies of EVs and smartphones suggest fast DC charging is less harmful than once feared if thermal management is good.
    • Heat, not current alone, is seen as the main degradation driver.
  • BYD is said to use advanced cooling (e.g., direct refrigerant immersion, pre‑warming, low‑resistance cells), plus better monitoring to avoid dendrite growth.
  • Many argue road‑trip fast charging will be occasional; daily charging should be Level 2 at home/work.

Charging infrastructure, grid impact, and buffering

  • Concern that megawatt‑class 5‑minute charging is a major logistical challenge for local grids.
  • BYD reportedly deploys local battery storage at stations:
    • Some say these are charged “off‑peak” to reduce grid stress.
    • Others argue full off‑peak storage for all demand is uneconomical; more realistic use is power‑smoothing (drawing lower continuous power and discharging in short, high‑power bursts).
  • Discussion of required battery capacity per site and trade‑offs between grid connection size and storage cost; details seen as an engineering/usage‑pattern question.

Geopolitics, trade, and market access

  • Long thread on US–China–Canada auto politics:
    • Canada’s limited opening to Chinese EV imports (49k units) is framed as a wedge in North American auto integration under current US tariffs.
    • BYD’s charging network is viewed as a way to rapidly entrench Chinese presence in Canada.
    • Speculation that Canada could pivot away from US auto suppliers if squeezed.
  • Debate over whether/when BYD can enter the US:
    • Some see Canada and Mexico as stepping stones; others predict strong US protectionism and even bans on Chinese‑origin cars (including via Canada/Mexico).
    • Concerns about dependence on Chinese infrastructure in a conflict scenario, countered by pointing out US tech/control risks as well.

EV adoption trajectories (US, Europe, China)

  • Multiple comments compare EV adoption:
    • China seen far ahead on EVs, batteries, and charging, with BYD as a key leader.
    • US is described as slow, politicized, and protectionist, but with potential due to home charging and solar.
    • Europe viewed as having early momentum but hampered by poor apartment/urban charging and fragmented, app‑heavy public networks; some countries are doing much better than others.

BYD product quality and labor ethics

  • European owners report strong build quality and a “premium” feel versus established brands; software impressions are less detailed.
  • Questions raised about parts availability and repairability, especially with cell‑to‑body designs.
  • Ethical concerns highlighted about alleged labor abuses in BYD’s Brazil operations and investigations in other countries; some commenters say this affects their purchase decisions.

Safety and fire risks

  • Sarcastic comments about “Flash” implying fires prompt discussion:
    • Several point out ICE vehicles also suffer frequent fire‑related recalls.
    • General view: both gasoline and high‑energy batteries carry risk; EV fires are often overemphasized.