The braking principle of a fuel vehicle is to generate huge friction during the braking process, converting the vehicle's kinetic energy into heat energy and dissipating it to achieve the purpose of reducing the speed. In other words, friction braking is used.
Electric vehicles use energy recovery braking. By controlling all or part of the braking modules to have a reverse energy flow function, part of the vehicle's inertial energy can be fed back to the energy storage device, and at the same time it can brake the vehicle.
The advantage of electric braking is only that it can recover energy, but the disadvantage is that certain problems may occur due to the complicated mechanical structure. For example, some models will prompt that kinetic energy recovery is unavailable under certain working conditions. In addition, during the braking process It is not as decisive as mechanical braking, so the best use environment currently is auxiliary braking.
Braking energy recovery of electric vehicles is a major factor in improving the energy efficiency of electric vehicles. Braking energy recovery must take into account the braking effect, braking energy distribution, characteristics of the energy storage battery, and utilization of stored energy, etc., and then determine how to implement the braking energy storage system.
In terms of mechanical braking, there is not much difference between electric vehicles and fuel vehicles. However, it should be noted that because electric vehicles need to carry batteries, they are heavier than fuel vehicles of the same size. Therefore, even if they start from the same starting point as fuel vehicles in terms of brake configuration , but the braking distance will also be longer, which is why many electric models have begun to use brakes from high-end brands.
In addition, another reason why electric vehicles are mistakenly thought to be unable to brake is that due to the characteristics of the electric motor, it reaches a high torque at the start, causing the vehicle to accelerate too fast. By the time we react, it is too late to apply the brakes. So it's not that I can't stop, it's that I didn't control the speed well.
Brake failure accidents of electric vehicles are not only caused by the car itself, but also by the driver's familiarity and control over the vehicle.