• Planté plates are positive plates made with pure lead versus a lead alloy. The active mass is formed by a corrosion process out of the grid. The demand for Planté plate is declining. Costly and challenging production techniques, and the requirement to use more lead in construction, do not deliver significant benefits as compared to alloyed tubular or flat plate batteries. Figure 1 shows Planté plate

• Pasted plates are flat, positive plates made by pasting the lead oxide active mass on a mesh grid. Figure 2 shows classic pasted plate

• Tubular plates use a frame structure consisting of a series of vertical spines connected to a common bus bar. The tubular design keeps the active material mechanically together and presses it onto the grid. The paste is held in micro- porous, non-conductive tubes (gauntlets), which are placed over the individual spines. Assembling the spines, gauntlets, lead oxide, and end cap together makes a positive plate. Volume changes during discharge and charge are mostly compensated by a high mass porosity, and gas bubbles help to distribute remaining free particles in the cell. Pressing the PbO2 corrosion layer onto the grid surface also helps to protect the lead grid against further corrosion. Figure 3  shows classic tubular plate

Reminder: the negative plates in all lead-acid cells are the flat, pasted type


source :sbsbattery.com