a system in an electric vehicle in which energy flows from the wheels to the battery when the driver uses the brakes to slow down or stop, rather than being wasted as heat. The energy in the battery can then be used when the car speeds up or starts moving again

The electric car has regenerative braking, so when you're coasting or braking, the battery recharges. 电动汽车有再生制动，所以当你滑行或者刹车时，电池会再充电。