Leaks containment embodiment for electrochemical stack

A flow battery, comprising:

• an anode electrolyte and a cathode electrolyte;
• a first tank for containing said anode electrolyte, said first tank having a first outlet;
• a second tank containing said cathode electrolyte, said second tank having a second outlet;
• a plurality of electrolytic membranes and electrodes,
• a plurality of planar cells, each of said plurality of planar cells having two mutually opposite faces, and each respective one of said plurality of planar cells respectively having plural respective channels on each of said two mutually opposite faces for independent conveyance of said anode electrolyte and said cathode electrolyte, said plurality of planar cells being mutually separated by said plurality of electrolytic membranes and electrodes,
• a plurality of hydraulic circuits and a plurality of pumps, each of said plurality of hydraulic circuits having a respective one of said plurality of pumps for supplying said anode electrolyte and said cathode electrolyte to respective ones of said plurality of planar cells;
• wherein said plurality of planar cells are mutually aligned and stacked so as to constitute a laminar pack, said laminar pack having a front side;
• an end plate being disposed on said front side of said laminar pack, said end plate having at least one access channel adapted to enable access of said anode electrolyte and said cathode electrolyte that are supplied to said laminar pack, and said end plate having at least one discharge channel adapted for conveyance of said anode electrolyte and said cathode electrolyte from said access channel to at least one of said first outlet of said first tank and said second outlet of said second tank, and
• at least one drainage channel that receives leakage of said anode electrolyte and said cathode electrolyte from said plurality of planar cells, and wherein said drainage channel is connected to one of said first tank and said second tank to return said leakage to said one of said first tank and said second tank.