Electrical System

The job of an automobile's engine is to convert chemical energy in  fuel form to useful mechanical turning force. In theory, this is simple. Yet, a car's engine consists of several systems that work together to accomplish a desired goal: getting a car to move. Some of these systems include the electrical system, the fuel system, the cooling system, and the lubrication system. Here we will dwell more into the electrical system of a vehicle.

The Battery

A car's battery plays a crucial role in the electrical system of a car. A car uses electricity from the battery to start the vehicle on demand. How? Chemicals within the battery store chemical energy. This power is then used to operate a starter, an electric motor that rotates the internal combustion engine so to initiate the engine's operation under its own power. 

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In addition, the battery also gives energy to power the electric fuel pump, which delivers fuel to the engine and to power the computer and ignition, which will then be used to ignite the air and fuel mixture inside the cylinders.

Alternator

Once an engine has been started and operating under its own power, a belt attached to the front of a rotating crackshaft powers an alternator, a type of electromechanic device that can convert mechanical energy to electrical energy.

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This electrical energy produced by the alternator is then used for several important tasks, including recharging the battery which can then be used for starting power, powering other electrical systems, powering the lights, blower motors, radio.