What is the Purpose of a Battery?
There are three main functions of the automotive battery. The main function for most vehicle batteries is to supply power the starter and ignition system so the engine can be cranked or started. The second is to supply the extra power necessary when the vehicle's electrical load requirements exceed the supply from the charging system. The battery must also act as a voltage stabilizer in the electrical system. The battery smoothes out or reduces high voltages, which occur in the vehicle's electrical system. These excessively high voltages would damage other components in the electrical system if it were not for the protection provided by the battery.
How does a Battery Recharge?
The discharged material on both plates is lead sulfate (PbSO4). When a charging voltage is applied, charge flow occurs. Electrons move in the metal parts; ions and water molecules move in the electrolyte. Chemical reactions occur at both the positive and negative plates converting the discharged material into charged material. The material on the positive plate is converted to lead dioxide (Pb02); the material on the negative plate is converted to lead (Pb). Sulfuric acid is produced at both plates and water is consumed at the positive plate. |
