Strap grid tubular plate

Schematic representation of three tubular plate designs (a) cylindrical tube cross section (b) elliptical tube cross section (c) strap grid tubular plate construction.

Fig. 3.4L Capacity curves for strap grid tubular positive plates (SGTP) (a) cast strap grids with smooth surface (b) die-cut strap grids with smooth surface (PCL-1 effect) (c) die-cut strap grids with rough surface obtained after reverse-current treatment prior to formation proper [54].

It has been established that on cycling of tubular positive plates with die-cut strap grids (SGTP) or of positive plates with expanded grids with flat ribs, a rapid capacity loss is observed (the PCL-1 effect, see Section 2.3, Chapter 2 and Chapter 9) [54]. The reason for this capacity loss is the formation of groups of PbS04 crystals in the layer of the PAM that contacts the current-collector (Fig. 3.39). These PbS04... 

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