Electrical Engineering ⇒ Topic : Sulphation of Plates
|
Maninder
| |
Sulphation of Plates If a lead-acid cell remains in a partially discharged condition for a long period or is not fully charged periodically, then the lead sulphate (PbSO4) formed during discharge is not fully converted back to Pb02 and Pb. Some of the unconverted lead sulphate gets deposited on the plates. This phenomenon is called *sulphation ofplates and the plates are said to be sulphated. The lead sulphate is white in colour, hard, insoluble in acid and is an insulator. Sulphation reduces the active surface of the plates which raises the internal resistance of the cell. The result is that capacity as well as efficiency of the cell is reduced. Cure. Sulphation of plates is undesirable and must be avoided. If the sulphation is slight, we can eliminate it by over-charging the battery using a low current for several days. Badly sulphated batteries can be given extra useful life by charging them with a current of one or two amperes for 50-100 hours. | |
| |
!! OOPS Login [Click here] is required for more results / answer