
48 Cells, batteries and transformers
When current is drawn from the cell the active chemicals on the
positive plate expand and the plate tends to distort, especially under
heavy loads. Some measure of protection against this distortion or
buckling, is achieved by arranging for each positive plate to be adjacent
to two negative plates (Diagram 59).
Action of lead-acid cell
When an external load is connected to the terminals of the cell, electrical
energy is delivered to the load. During this discharge period, a chemical
reaction between the plates and the electrolyte takes place and a layer of
lead sulphate is deposited on the plates. However ...