Regenerative Braking
An energy recovery system that slows a vehicle by converting kinetic energy into electricity to recharge a high-voltage battery.
Regenerative braking is an energy recovery mechanism used in hybrid and electric vehicles that slows down the vehicle by converting its kinetic energy into electrical energy. Instead of wasting this energy as heat through friction brakes, the vehicle's electric motor is run in reverse to act as a generator.
When the driver lifts off the accelerator or presses the brake pedal, the motor resists the wheels' rotation, creating a braking force that slows the vehicle. The electricity generated is directed to recharge the high-voltage traction battery. The traditional friction brakes (pads and rotors) are still present but are only used for hard stops, emergency braking, or at very low speeds, significantly extending their service life.
Because the friction brakes are used less frequently, they are susceptible to rust buildup on the rotors and seized caliper slide pins due to lack of exercise. Mechanics servicing hybrid and EV brake systems must perform periodic cleaning and lubrication of the brake calipers to ensure they operate smoothly when needed. Diagnosing regenerative braking issues requires advanced scanners to interface with the hybrid/EV controller.