This circuit is composed of a generator can be a DYNAMO in the oldest cars that would responsible for producing DC or an alternator that produces alternating current and becomes continuous.
The electricity is produced when the engine by V-belt drives the generator. Limit the voltage regulator and the current intensity in general. The current produced reaches the vehicle battery.
This is generally composed of six vessels in which we find: A beam of positive plates interleaved with other negative plates. Separators that isolate the two types of electrolyte (liquid) plates covering plates.
Each glass generates around 2 volts tension. Connected as a total voltage of 12 volts which is operating the vehicle are in series generally. Of the positive plates, or get a positive terminal to the external circuit and the negative plates of a connector or negative.
The battery should have enough stored electricity to start the engine and power the circuitry necessary if engine stop or meet this turning at low speeds.