What is the difference between regenerative braking and dynamic braking in the Audi e-Tron?

I've heard that both regenerative braking and dynamic braking are used in electric cars to recover energy. But what exactly are the differences between the two, and how are they implemented in the Audi e-Tron?

Regenerative braking uses the electric motor to slow down the car and convert kinetic energy into electrical energy, which is then stored in the battery. On the other hand, dynamic braking uses the friction between the brake pads and rotor to slow down the car and convert kinetic energy into heat energy that is dissipated. In the Audi e-Tron, both methods are used in combination to maximize energy recuperation.

One key difference between regenerative and dynamic braking is the amount of control the driver has over the braking force. Regenerative braking can be controlled through the pedal or paddles, giving the driver more control over the amount of energy recovered. Dynamic braking, on the other hand, is automatic and cannot be adjusted by the driver. In the Audi e-Tron, the driver can choose between three levels of regenerative braking.

Another important difference is the efficiency of the two methods. Regenerative braking is generally more efficient as it converts energy that would otherwise be lost into usable electrical energy. Dynamic braking, on the other hand, produces heat as a byproduct, which is not as efficient. In the Audi e-Tron, regenerative braking is the primary method for slowing down the car, with dynamic braking only being used when regenerative braking is not possible.