FORD 2013 Focus Electric - Manual (Page 260)

Regenerative braking system
Your vehicle uses a feature known as regenerative braking. This is used
to simulate the engine braking of an internal combustion engine and
assist the standard brake system while recovering some of the energy of
motion and storing it in the battery to improve fuel economy. The
standard brake system is designed to fully stop the car if regenerative
braking is not available. During regenerative braking, the motor is spun
as a generator to create electrical current. This recharges the battery
and slows the vehicle. In effect, once the accelerator pedal is released,
the motor changes from an energy user to an energy producer.
When the accelerator pedal is released or the brake pedal is applied, the
brake controller automatically detects the amount of deceleration
requested and optimizes how much of the deceleration will be produced
by regenerative braking. The remaining portion is generated by standard
friction braking. When the battery is almost fully charged, the amount of
regenerative braking is limited to avoid overcharging, and the requested
deceleration is produced by standard friction braking alone.
Regenerative braking does not take the place of the standard friction
brakes; it only assists them. Regenerative braking has also been designed
to interact with the anti-lock brake system. Regenerative braking is
disabled when the anti-lock brake system is activated or the battery is
fully charged.
Brake Over Accelerator
In the event the accelerator pedal becomes stuck or entrapped, apply
steady and firm pressure to the brake pedal to slow the vehicle and
reduce motor power. If you experience this condition, apply the brakes
and bring your vehicle to a safe stop. Turn the motor off, shift to P
(Park) and apply the parking brake, and then inspect the accelerator
pedal for any interferences. If none are found and the condition persists,
have your vehicle towed to the nearest authorized dealer.
260 Driving
2013 Focus Electric Vehicle (fob)
Owners Guide gf, 1st Printing
USA (fus)