STEM与日常科技·英语30篇（9）

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电动车如何在刹车时充电

Regenerative braking converts kinetic energy back into electrical energy using the motor as a generator.
When drivers lift off the accelerator, magnetic resistance slows the wheels and spins the rotor.
This motion induces current in copper windings, sending power back to the battery pack.
Energy recovery works best at city speeds—above 40 km/h, friction brakes take over gradually.
Dashboard displays show real-time wattage reclaimed, often 5–15% of total driving energy.
Cold batteries accept less regen charge, so systems throttle output until optimal temperature returns.
Drivers can adjust regen strength: strong mode allows ‘one-pedal driving’ in stop-and-go traffic.
Over a year, regen may extend range by 100–300 km—equivalent to several free fuel stops.