STEM与日常科技·英语30篇（1）

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快充协议与电池发热的安全边界

Fast charging increases voltage and current to recharge batteries in under an hour.
But pushing too much energy too quickly raises battery temperature dangerously.
Modern phones use smart protocols like USB-PD or Qualcomm Quick Charge to manage heat.
These protocols communicate between charger and device to adjust power dynamically.
Thermal sensors inside batteries trigger slowdowns if temperatures exceed safe thresholds.
Lithium-ion cells degrade faster when regularly exposed to high heat or full charge cycles.
Manufacturers limit peak charging speeds after reaching about 50–80% capacity.
Cooling systems like graphite sheets or vapor chambers help dissipate heat efficiently.
Using non-certified chargers bypasses safety negotiations and risks overheating.
Engineers balance speed, longevity, and safety—not just raw wattage.