What charges the battery in a car? Does it charge automatically while the car is running or do I need a charger or something?

Automatic charging while the car is running

The role of car battery:

The battery is a device that converts chemical energy into electrical energy, which belongs to the DC power source, and its roles are:

(1) When starting the engine, it can provide a strong starting current to the starter motor (about 10A).

(2) When the generator is overloaded, it can assist the generator in supplying power to electrical equipment.

(3) When the engine is at idle, it supplies power to electrical equipment.

(4) The battery is also a high-capacity capacitor that protects the car's electrical appliances.

(5) When the generator terminal voltage is higher than the electric potential of the lead battery, a portion of the electrical energy is converted into chemical energy and stored, that is, charged.

Expanded information:

The design life of the battery is 27 months, the general family car is more frugal, the battery of the new car is used in many 3-4 years, but the replacement of the once! After that, the battery must be replaced in about 2 years.　

The newer the car, the more the battery saves, because the motor is good to save battery, generator is good to use the battery can be fully charged, the car is old, especially the two big pieces of motor generator replacement, due to the two products on the market, the difference between the original goods and refurbished goods is huge, so it is easy for owners not to change the original parts, and after the battery is more likely to be bad.

Accelerating battery aging operations are:

1, over-discharge

2, battery storage for a long time (in the storage period has not been charged)

3, can not be charged through the automobile engine

4, no electrolyte

5, the specific gravity of the electrolyte is too high

6, charging at high temperatures

6, charging

7, the impact of the car engine is not a good idea. p>

7, contaminated by dirt (such as hydrochloric acid, seawater, organic acids and other pollution)

8, battery charging plus excessive current

9, electrode plate deformation caused by the positive plate and the negative plate in contact with each other, resulting in short-circuit phenomenon

10, in the plate on the top and bottom of the deposition of dirt, resulting in short-circuit

Reference:

Baidu Encyclopedia - Automotive Battery