Construction and Working of Lead-Acid Accumulator

Construction and Working of Lead-Acid Accumulator Points : Definition, Construction and Working of Lead-Acid Accumulator, Modern Lead Accumulator Definition This is a kind of secondary cell and is used to supply electric current. Construction It consists of a pair of lead plates A and B immersed in a vessel containing dilute sulphuric acid. Working When cell is working, the oxide coated plate A become positive terminal and metal plate B becomes negative terminal and current flows from A to B through the external circuit and from B to A through the acid.
Following chemical action takes place during working.
PbO₂ + H₂ → PbO + H₂0
PbO + H₂S0₄ →PbSO₂ + H₂0 Modern Lead Accumulator In modern accumulator instead of lead plates, lead grids are used and in the spaces of grids a mixture of lead oxide and sulphuric acid is used for the anode plate.